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UHMWPE sheet is widely used in various fields such as fenders, carriage slides, coal bunker linings, roller skates, railway, highway and bridge bearing gaskets; Cnc Machining UHMWPE profiles can be prepared by machining the sheet, or obtained by injection molding

5.1 Compression molding

(1) Compression molding process

Compression molding is the earliest processing method for UHMWPE machining, and the process flow is shown in Figure 12. The method is not affected by the molecular weight and fluidity of the resin raw materials, and produces products with small internal stress and warpage deformation, simple equipment, low production cost, and low production efficiency.

In addition to the traditional compression molding process, the preparation methods of the sheet include:

• Extrusion molding. Use a plunger extruder for reciprocating batch extrusion or a screw extruder for continuous extrusion;
• Gas-assisted extrusion molding. During the screw extrusion process, a stable gas is injected between the die and the melt material to provide full-slip boundary conditions on the wall surface and reduce the frictional resistance between the melt and the flow channel;
• Ultrasonic powder molding method. Use ultrasonic vibration to quickly heat and plasticize the powder itself and then mold it;
• High-speed impact molding. At the temperature near the melting point, the mold filled with powder is subjected to high-speed impact and then sintered.

All of the above methods can improve the production efficiency of plates, but they are not easy to form larger products, and are limited in actual production.

(2) Plate modification technology

UHMWPE sheet has low surface hardness, easy fatigue wear, poor heat resistance and creep resistance, which restrict its application in some specific environments. In order to improve these deficiencies, domestic and foreign scholars have done a lot of research on molding resin or product modification, the main methods are polymerization modification, filling modification, cross-linking modification and so on.

Using new catalysts or in-situ polymerization to modify UHMWPE resin from the catalytic polymerization stage can prepare resins with specific molecular chain structures or compound modified resins that are uniformly mixed at the molecular scale, but the technical barriers are high; filling modification is simple and easy to implement However, there are problems of filler agglomeration or poor compatibility; cross-linking modification can better improve wear resistance and heat resistance. Among them, chemical cross-linking is more sensitive to the amount of cross-linking agent, and the residual instability after radiation cross-linking The degradation of free radicals and oxidative components has an effect on the properties of composite materials.

The author’s research group in this paper prepared UHMWPE composites with good self-lubrication, thermal conductivity, wear resistance, creep resistance and load-bearing capacity through solid-phase grafting, organic-inorganic hybridization and other methods. The large amount of frictional heat accumulated in the friction process cannot be conducted and plastic deformation occurs, which brings about potential safety hazards. Successfully prepared high wear resistance, high load bearing, and long cumulative displacement that can meet the needs of highway and railway bridge bearings. UHMWPE profiles.

5.2 Injection molding

(1) Injection molding process

Injection molding is the most efficient production method for large-scale preparation of various UHMWPE wear-resistant profiles. Compared with ordinary plastics, UHMWPE injection molding has the following difficulties: resin is difficult to feed, difficult to plasticize; melt viscosity is large, easy to block; injection molding is difficult to compact; product cooling is easy to deform.

Japan’s Mitsui Petrochemical Company realized the injection molding and commercialization of UHMWPE in the 1970s. Its injection molding technology is actually a combination of plunger injection and compression molding, which has the defects of poor plasticization, slow heat transfer and long molding cycle. ; Later, the reciprocating screw injection molding technology was developed, and the melt was sheared and stretched by the reciprocating screw, which solved the problems of poor plasticization.
In the 1980s, Beijing Plastics Research Institute improved the reciprocating screw to complete UHMWPE injection molding using high pressure and high speed injection technology. However, due to the low clamping force of domestic injection molding machines and the backward operating system, the stability of injection molding products was poor. In addition, UHMWPE injection molding is carried out by plunger push injection machine, multi-plunger injection machine, and plunger stamping injection machine, but there are disadvantages such as poor plasticizing effect, long molding cycle, and small melt amount.

In recent years, some companies have used reciprocating screw injection molding machines to inject flow-modified UHMWPE, but so far, injection molding technology has not been applied on a large scale in the field of UHMWPE.

The research shows that the screw groove of the feeding section is of equal depth, the screw groove of the compression section is gradually shallower, the homogenization section is divided into two sections, the deep screw groove and the shallow screw groove, and the nozzle is divided into a cylindrical cavity, a conical cavity, a nozzle hole and an inverted conical cavity. The design of the machine can promote the material to be gradually plasticized in the barrel and achieve smooth injection. The movable cavity technology is adopted, the cavity is expanded when filling the mold, and the cavity is compressed when the mold is clamped, so that the melt compaction can effectively improve the shrinkage problem of the product. . The order of the influence of various process parameters of the screw injection molding machine on the tensile properties of the product is injection pressure > injection speed > temperature in the metering section > screw speed.

The author of this paper believes that UHMWPE is easy to slip and can be fed with a deep screw groove design; a reasonable distance between the screw and the barrel can achieve full shear melting of high-viscosity melt and avoid screw locking; appropriate nozzle diameter can provide sufficient shear And avoid poor discharge; appropriate injection pressure and clamping force can ensure that the mold cavity is filled without overflowing; the variable mold temperature technology of high mold temperature filling and gradually decreasing mold temperature and pressure can also effectively solve the problem of product shrinkage.

(2) Modification technology of injection molding raw materials

Much of the focus on modification of injection-molding grade resins is to improve fluidity, including polymerization modification and blending modification. For example, bimodal polyethylene, solvent oil-containing resin, lubricating modifier-containing resin, etc. are prepared by new catalysis and polymerization processes; in addition, the processing performance of 3d printing and UHMWPE materials is improved by blending with components that improve the fluidity of the matrix.

HDPE and UHMWPE have good compatibility, UHMWPE/HDPE blending is a more convenient and effective method for UHMWPE flow modification; nanoparticles make composite materials have the characteristics of organic, inorganic and nanomaterials, and nanoparticles are introduced by in-situ polymerization , which can prepare injection-molding grade composite materials with uniform dispersion; use new catalytic polymerization technology such as single active center to develop new resins with both narrow molecular weight distribution and long-chain branched structure and low entanglement degree, which can solve the problem of processing performance and mechanical properties. The contradiction between them is also a research direction worth looking forward to.

Improving the fluidity of the resin can avoid problems such as melting glue and injection difficulties. The filling method also needs to solve the problems of loose product structure and serious shrinkage. Only when the fluidity modification is matched with the injection molding process and equipment can the final injection molding products with stable comprehensive performance and excellent quality be formed.

5.3 Artificial joints

At present, more than 90% of the artificial joint materials on the market are made of UHMWPE material. There are about three million joint replacement surgeries in the world every year. The wear and damage of UHMWPE components are the main factors affecting the life of artificial joints.

(1) Preparation process

UHMWPE artificial joints can be prepared by two methods of plunger extrusion and molding, and then modified and processed to obtain artificial knee joints, hip joints and other products. Compression-molded UHMWPE has an isotropic crystal orientation, while plunger extruded material has a slightly different crystal morphology with distance from the centerline. These crystal morphology differences can lead to subtle differences in fatigue crack growth behavior, Thereby affecting the phenomenon of osteolysis. Therefore, the use of molded UHMWPE molding or pom cnc machining is currently the mainstream of artificial joints.

(2) Research progress

UHMWPE was first used to make artificial joint liners and pads in 1960. At present, the wear resistance of UHMWPE base resin cannot fully meet the long-term use of joints. Research institutions and enterprises such as Massachusetts General Hospital have developed cross-linked UHMWPE, which greatly reduces joint wear and tear. FDA (FDA) approved for clinical use.

Subsequently, European and American countries invented vitamin E polyethylene, which has both anti-oxidation and wear resistance properties, and was approved by the FDA for clinical use in 2009. my country has gradually used UHMWPE to make joint liners since 1990, but the molecular weight, molding process and joint manufacturing process of domestic UHMWPE are relatively backward, the clinical life of artificial joints is short (about five years on average), and complications caused by wear and tear serious.

Increasing the entanglement density of UHMWPE by melt annealing can improve its amorphous region microstructure, thereby reducing the osteolysis of UHMWPE (i.e., grinding slag due to wear); however, the effect of melt annealing is limited and cannot effectively maintain high entanglement. state, the use of radiation crosslinking to reduce the chain mobility required for large-scale plastic deformation can slow down the formation of surface debris; however, secondary thermal processing after or during radiation melting can lead to oxidative degradation of the material , causing a decrease in crystallinity and strength, and using vitamin E as an antioxidant for medical-grade UHMWPE can eliminate residual free radicals in highly cross-linked UHMWPE artificial joints.

Recently, researchers found that the flavonoid natural antioxidants rutin, quercetin and tea polyphenols are more antioxidant than vitamin E. The author’s research group cooperated with key domestic artificial joint research units and enterprises to first obtain UHMWPE resin with reasonable molecular weight, distribution, particle size and distribution, and metal residue and comprehensive properties that meet the requirements of implant-grade standards; Research on modification of cross-linking, antibacterial and anti-oxidation.

Plastic processing, also known as plastic molding, is the process of processing plastics or synthetic resins into plastic products. It can be said to be one of the largest production sectors in the plastics production industry. Plastic processing is developed because of the development of synthetic resins. With the continuous improvement of science and technology, plastics
The processing technology has also been greatly improved. At present, it is mainly composed of the steps of batching, molding, cnc plastic machining, joining, modification, and assembly. Let's take a closer look at its technological process.

Plastic Processing Process

1. Ingredients

This is the first step in the plastic processing technology. In addition to the polymer, it requires the addition of some plastic additives such as stabilizers, plasticizers, colorants, etc., so that the performance of the processed plastic products will be greatly improved. improve, and also reduce production costs. The polymer and additives are mixed together and dispersed as a dry mix. It can also be processed into pellets.

2. Forming

This is the most critical step in the plastic processing process. We need to make various forms of plastic into the desired shape. There are many ways to form this, and the choice is mainly based on the type of plastic, the initial shape, and the size and shape of the product. If it is a thermoplastic, extrusion, injection molding, calendering, blow molding and thermoforming are generally used; if it is a thermosetting plastic, molding, transfer molding, or injection molding can be used. In addition, there are castings using liquid monomers or polymers as raw materials.

3.CNC Plastic Machining

This step can be seen as an auxiliary process of forming. It can borrow the cnc plastic machining methods of metal or wood to manufacture some plastic products with precise dimensions or small quantities. However, the performance of plastic is completely different from that of metal and wood. The tools and cutting speed used in machining must conform to the characteristics of plastic.

4. Joining

This step is to join the plastic parts together. There are two main methods: welding and bonding. The welding methods are mainly hot air welding, hot melt welding, high frequency welding, friction welding, ultrasonic welding, etc. The bonding method is done using adhesives such as flux, resin solution and hot melt adhesive bonding.

5. Modification

The purpose of this step is to beautify the surface of plastic products, generally through mechanical modification, that is, grinding, filing, polishing, etc.; and then finishing, such as coating the surface of the product with paint, covering the surface of the product with a patterned film, etc. ; There are also coloring, such as painting, printing, etc.; there are also metal plating, including vacuum coating, electroplating, and chemical silver plating.

6. Assembly

This is the last step in plastic processing, which is to combine the individual plastic parts processed into a complete plastic product.

Several of the most common plastic processing processes

• Extrusion: Extrusion is also called extrusion in plastic machining and extrusion（Different from aluminum extrusion） in rubber processing. It refers to a processing method in which the material passes through the action between the extruder barrel and the screw, is heated and plasticized, and is pushed forward by the screw, and continuously passes through the head to make various cross-sectional products or semi-products. Extruded products are continuous profiles, such as tubes, rods, wires, plates, films, wire and cable coatings, etc. The extruded products produced by Baoyi use a variety of unused raw materials, among which the most commonly used are cnc machining peek,PC, ABS, PVC, PS, PE, PP, TPE, TPE, TPU, etc. After the processing is completed, there are many plastic products such as LED lampshades, drain pipes, supermarket price tags, etc. that appear in our lives. The processing technology is extrusion.
• Injection Molding: Thermoplastic injection molding, a method in which the plastic material is melted and then injected into the film cavity. Once the molten plastic enters the mold, it is cooled and shaped into a cavity-like shape. Injection-molded products are also very common in our lives. Our most common products are: computer case shells, connectors, mobile phone shells, keyboards, mice, stereos, etc.
• Blow molding: also known as hollow blow molding, a rapidly developing plastic processing method. The tubular plastic parison obtained by extrusion or injection molding of thermoplastic resin is placed in a split mold while it is hot (or heated to a softened state), and compressed air is introduced into the parison immediately after closing the mold to blow the plastic parison. It expands and sticks closely to the inner wall of the mold, and after cooling and demoulding, various hollow products are obtained. The plastic processing technology for bottles, barrels, cans, boxes and all containers for packaging food, beverages, cosmetics, medicines and daily necessities that are common in our lives is blow molding.

The above is the technological process of plastic processing. The most important ones are the first two steps. The latter four processes are carried out after the plastic has been formed into a finished product or semi-finished product, which is regarded as the secondary processing of plastic. In the process of plastic processing, it is inevitable to encounter various problems, among which the plastic processing shrinkage problem is the most common and the most difficult one. Only by minimizing this problem can a higher quality of the product be guaranteed. However, with the continuous improvement of plastic processing technology, it is believed that this problem will be solved in the future.

Cutting Vibration

How To Control Vibration During Cutting During CNC Machining?Cutting vibration usually occurs in turning of slender shafts, turning of thin-walled parts, etc. Once the vibration intensifies, there will be intense vibration with an amplitude exceeding several tens of μm, usually accompanied by a large amount of noise. In the cutting process, the vibration may exceed 100μm. Although it can be processed, there will be obvious vibration scratches on the machined surface, which is not allowed on the finished surface.

Hazards Of Cutting Vibration

Vibration in metal cutting is a very harmful phenomenon.

• 1. Affecting the surface quality of parts If vibration occurs during processing, there will be relative displacement between the tool and the workpiece, which will cause vibration marks on the machined surface, seriously affecting the surface quality and performance of the parts;
• 2. When cutting vibration of the machine tool and tool life is reduced, the process system will continue to bear the action of dynamic alternating loads, the tool is easily worn (even chipped), the connection characteristics of the machine tool are damaged, and even the cutting process cannot be continued in severe cases;
• 3. Noise is harmful to the health of the operator The noise generated in the vibration will also endanger the health of the operator. In order to reduce the vibration, sometimes the cutting amount has to be reduced, which reduces the production efficiency of machine tool processing.

Therefore, in order to ensure the normal operation of such machining equipment, the control of cutting chatter becomes more and more important.

The Causes Of Cutting Vibration

For the tool to vibrate when cutting the workpiece, the following three conditions must exist at the same time:

• The first is that the rigidity of the process system including the tool is insufficient, resulting in its low natural frequency.
• The second is that the cutting generates a sufficiently large external force,
• The third is that the frequency of the external excitation force is the same as the natural frequency of the process system and then resonance occurs.

How To Eliminate Cutting Vibration

(1) Solutions

• The first is to reduce the cutting force to a minimum,
• The second is to maximize the static rigidity of the tool system or fixture and the workpiece;
• The third is to create another vibration inside the tool holder to disrupt the vibration frequency of the externally excited cutting force, thereby eliminating tool vibration.

(2) Countermeasures

1. The first is to reduce the cutting force to a minimum

• (1) Use a sharp blade to reduce cutting force
• (2) When the depth of cut is constant, use a small tool nose arc radius
• (3) For boring tools with slender shanks and turning slender shaft parts, 90-degree leading angle tools should be used
• (4) For milling cutters with slender rods, circular blade milling cutters are the most beneficial for vibration reduction.
• (5) The plunging method is often used when aluminum cnc milling deep cavities with slender rod end mills
• (6) The face milling cutter adopts sparse tooth unequal distance milling cutter to reduce milling vibration
• (7) The smaller the blade edge angle, the better

2. Improve the static rigidity of the tool holder (Static Toughness)

Use solid carbide or heavy metal toolholders to improve the static rigidity of the toolholder 3. Improve the dynamic rigidity of the tool—passive damping and vibration-isolating toolholders

3. Improve the dynamic rigidity of the tool—passive damping and vibration-isolating tool bar

The Classification Of CNC Machine Tools

There are many classification methods for CNC machine tools, which can be roughly classified according to the type of machine tool structure, control method, china cnc machining movement method, and machine tool processing method.

1. Classification by machine tool structure

If it is classified according to the machine tool structure, then the main distinction is in the number and method of machine tool motion axes, usually two-axis linkage lathes, three-axis linkage machine tools (such as those with tool magazines are called machining centers), and four-axis linkage machine tools (which move The axis consists of X, Y, Z, A four axes), five-axis linkage machine tool (usually consists of X, Y, z, A, C or X, Y, Z, B, C five axes).

2. Classification of control methods

The control of the machine tool is usually realized by the servo mechanism, so according to the different detection positions of the machine tool, it can be divided into three types: open-loop, semi-closed-loop and closed-loop control.

• (1) Open-loop control: It does not detect any feedback device, and the information control feedback belongs to a one-way mode, so it is called an open-loop control mode. Advantages: The system is relatively stable. Disadvantages: There is no feedback device, and its accuracy is mainly controlled by the transmission accuracy of machine tool components, and the relative accuracy is not high.
• (2) Semi-closed loop control: The total detection feedback device usually controls the feedback in the rotating part of the screw of the machine tool, not in the actual position detection of the moving parts, which is called semi-closed loop control. There is an error in the machine tool screw transmission, which is difficult to eliminate, so the actual detection position is not as good as the closed-loop control of directly detecting the workpiece, but the error can be debugged and compensated, so high-precision machining can still be obtained.
• (3) Closed-loop control: The detection feedback device directly detects the workpiece, so it is called closed-loop control. Because the feedback can be detected and compensated for the entire transmission error, higher accuracy can theoretically be obtained. In practice, the stability of precision control is difficult, and there are many influencing factors.

3. The Classification By Machining Motion

CNC machine tools can be divided into point control machine tools, linear control machine tools, and contour control machine tools according to the movement mode. The differences between them are as follows.

• Point control machine tool: Point control is simply point movement, similar to drilling movement. 189 top group
• Linear control machine tool: The movement of the linear control machine tool is simple, and its movement is similar to that of a CNC grinder.
• Contour control machine tool: The movement of the contour control machine tool is complex, which can complete the three-dimensional movement in space and complete the processing of complex profile workpieces.

4. Classification By Machine Tool Processing Method

According to the machine tool processing method, it can be divided into CNC turning, CNC milling, CNC grinding, CNC drilling, CNC planing, laser wire cutting and other special machine tools, special CNC machine tools also include CNC forming machines, CNC shearing machines, CNC spark machines, CNC wire Cutting machine etc.

General Rule Of Knife Path

Rough opening: Under the maximum load of the machine tool, in most cases, the largest possible knife, the largest possible feed amount, and the fastest possible feed should be used. In the case of the same tool, the feed is inversely proportional to the feed amount. Under normal circumstances, the load of the machine tool is not a problem, and the principle of tool selection is mainly based on whether the two-dimensional angle and three-dimensional arc of the product are too small. After the tool is selected, the tool length is determined. The principle is that the tool length is greater than the machining depth. For large workpieces, it is necessary to consider whether the chuck interferes.

Smooth knife: The purpose of the smooth knife is to meet the precision cnc machining experience requirements of the surface finish of the workpiece and to reserve an appropriate allowance. Similarly, the light knife uses the largest knife and the fastest time possible, because the fine knife takes a long time, and the most suitable feed and feed are used. Under the same feed, the larger the lateral feed, the faster. The surface feed amount is related to the finish after machining, and the feed size is related to the surface shape of the surface. In the case of not damaging the surface, leave the minimum allowance, Use the largest knife, the fastest speed, and the appropriate feed.

Clamping Method

• 1. All clamps are horizontal and vertical.
• 2. Vise clamping: the clamping height should not be less than 10 mm, and the clamping height and cnc machining height must be specified when cnc machining metal parts. The cnc machining height should be about 5 mm higher than the plane of the vise, the purpose is to ensure the firmness, and at the same time not to hurt the vise. This kind of clamping is a general clamping, and the clamping height is also related to the size of the workpiece. The larger the workpiece, the larger the clamping height.
• 3. Clamping of the splint: the splint is coded on the worktable with a code, and the workpiece is locked on the splint with a screw. This kind of clamping is suitable for workpieces with insufficient clamping height and large machining force. Generally, medium and large workpieces have better effect. .
• 4. Code iron clamping: when the workpiece is large, the clamping height is not enough, and it is not allowed to lock the wire at the bottom, the code iron is used for clamping. This kind of clamping requires a second clamping, first code the four corners, process the other parts, and then code the four sides and process the four corners. When the second clamping, do not let the workpiece loose, first code and then loose. You can also code both sides first and process the other sides.
• 5. Clamping of tools: if the diameter is above 10mm, the clamping length should not be less than 30mm; if the diameter is below 10mm, the clamping length should not be less than 20mm. The clamping of the tool should be firm, and the collision of the tool and the direct insertion of the workpiece should be strictly avoided.

Classification Of Tools And Their Scope Of Application

1. According to the material

• White steel knife: easy to wear and tear, used for roughing copper and small steel materials.
• Tungsten steel knife: used for cleaning corners (especially steel) and light knives.
• Alloy knife: similar to tungsten steel knife.
• Purple knife; used for high-speed cutting, not easy to wear.

2. According to the cutter head

• Flat-bed knife: used for flat and straight sides to clear flat angles.
• Ball knife: used for light and light knives on various curved surfaces.
• Bull nose knife (with one side, two sides and five sides): used for roughing steel (R0.8, R0.3, R0.5, R0.4). Rough leather knife: used for rough cutting, pay attention to the allowance of the margin (0.3).

3. According to the cutter bar

• Straight bar knife: Straight bar knife is suitable for various occasions.
• Oblique bar knife: but not suitable for straight face and face with a slope less than the slope of the bar.

4. According to the blade

Two-blade, three-blade, four-blade, the more blades, the better the effect.

5. The difference between ball knife and flying knife light knife

Ball knife: When the concave ruler is smaller than the ball ruler, and the plane ruler is smaller than the ball R, the light will not reach (the bottom corner cannot be cleared).
Flying knife: The advantage is that it can clear the bottom corner. Comparison of the same parameters: V=R*ω, the speed is much faster (flying knife), the light is bright, and the flying knife is mostly used for the contour shape, and sometimes the flying knife does not need medium light. The disadvantage is that the size of the concave surface and the plane ruler are smaller than the diameter of the flying knife.

CNC With EDM, The Practice Of Copper

1. Under what circumstances do you need to be a copper worker:

The knife does not go down at all to make a copper male, and there is still a copper male that cannot go down. The shape is protruding and needs to be divided.

The knife can go down, but the knife that is easy to break also needs to be made of copper, which depends on the actual situation.

Products that require fire patterns need to be made of copper. If the copper male cannot be made, the bone position is too thin and too high, and the male is easily damaged and deformed. It is deformed during  cnc machining and sparks. At this time, inserts are required.

The surface of things processed by Tong Gong (especially the curved surface will be very smooth and uniform) can overcome many problems in fine gongs and many problems in drawing. When a precise shape or a large margin is required, a thick copper male must be made.

2. Tong Gong’s practice:

Select the surface to be the copper male, complete the supplemented surface, or extend the extended surface to ensure that all the edges of the copper male are larger than the edges to be punched and do not damage the surface of other products, and remove unnecessary cleaning. The plane angle (the intersection with the plane angle is a deeper glue position), and make up a regular shape; find the maximum shape of the copper male, use a boundary and then project it to the support surface; determine the size of the reference frame, cut off the support surface, and reach This copper public drawing is basically completed; material preparation: length * width * height, length and width ≥ Ymax and Xmax as the reference frame, the length and width of the actual copper material must be larger than the reference frame on the picture. Height ≥ theoretical size of copper male + reference frame height + clamping height.

The Problem Of The Number Of Drawings

1. If there is no ready-made cnc milling surface, the plane is divided into four sides, the center is to the origin, the top is zero, and the top surface is uneven (for copper males) to leave a margin of 0.1, that is, when the number is touched, the actual value of 0 (z ), which is 0.1 lower on the graph.
2. When there is a ready-made processing surface, make the ready-made face on the figure 0(z), and the plane can be divided into the middle, otherwise, the actual height, width and , the length is different from the drawing, and it is programmed according to the actual material. In general, it is first processed to the size on the drawing and then processed to the shape on the drawing.
3. When multiple positions are required for processing, the first position (standard position), the benchmarks of the other positions must be set well, and the length, width and height must be
4. The positioning of the inserts: put them in the whole, raise the bottom to a certain height, and then raise the height of the drawing. The plane is divided according to the whole, and the height is locked with screws under the drawing; The center can be divided into the middle; the rough point can be divided into the maximum shape; cut a fixture, according to the fixture, the relative position of the insert drawing and the fixture is determined, and then the origin of the drawing is placed at the center of the fixture.

The Choice Of Rough Cutting Path

1. Surface grooving

The key is the selection of the range and the selection of the face.

The area of ​​toolpath processing is: the selected surface within the selected range is the end surface, and the principle is all the places the tool can go from the highest point to the lowest point. The selected surface is preferably the whole surface, and the boundary can only be the area to be processed. The non-surface extends a distance of less than half the tool radius. Because there is enough margin for other surfaces, it is automatically protected; it is best to extend the lowest line, because There is an R gong at the lowest point.

Knife selection: If the tool cannot be fed spirally or obliquely, or the area that cannot be machined cannot be fed, the area where the tool cannot be fed is sealed and left for the second roughing.

Before the light knife, be sure to roughen all the areas that have not been roughened, especially the small corners, including two-dimensional corners, three-dimensional corners and sealed areas, otherwise the knife will be broken. Secondary roughing: generally use three-dimensional grooving to select the range, flat-bottomed knives, and those that can use plane grooving and contour tool paths. In the case of not hurting other surfaces, the center of the tool reaches the selected boundary. Generally, the boundary is not refined. Use a fast two-way angle depending on the situation. Helical feed, angle 1.5 degrees, height 1. The spiral lower knife is fed with an oblique line. Generally, the filter is turned on, especially when the curved surface is thickened.

• Retraction: Generally, relative retraction is not required, but absolute retraction is used. When there is no island, relative retraction is used.
• Plane grooving: milling various planes, concave and flat grooves, when milling part of an open plane, it is necessary to set the boundary, in principle, the tool can be fed (more than one tool diameter), the opening is more than half the tool diameter outside, closed peripheral.
• Shape: When the selected plane is suitable for shape layering, use the shape layered knife (plane shape), when the point of lifting the knife and the point of the lower knife are at one point, the knife does not need to be lifted. ; The correction direction is generally right correction (smooth knife).
• The tool path setting for mechanical correction: the correction number is 21, and the computer correction is changed to mechanical correction, and the feed is vertical feed. If the knife cannot pass, change the R to a larger value without leaving a margin.
• Equal height shape: it is suitable for the closed surface. If the open surface is four circles, the surface should be sealed. If it is within four circles or non-four circles, the range and height should be selected (a certain arc-shaped feed and thickening are required.) ), used for roughing: the machining distance in any plane is less than one tool diameter, if it is greater than one tool diameter, a larger tool or two contours of equal height should be used.
• Curved surface streamline: It has the best uniformity and brittleness, and it is suitable for light knives to replace contour shapes in many cases.
• Radial tool path: suitable for cases with large holes in the middle (use less). Matters needing attention: bounce the knife, the knife is not sharp, the knife is too long, when the workpiece is too deep, it should go around and cannot go up and down; the surfaces on both sides of the sharp corner in the workpiece should be divided into two tool paths, and cannot be crossed. The edge of the light knife is the best Extend (advance and retreat with an arc).

Clear Angle

• The clean angle here is the two-dimensional dead angle, which is the part that has not been reached in the previous process. If the light knife needs to go to the place, the angle should be cleaned first and then the light knife. If the angle is too small and deep, it can be divided into several knives. , do not use a knife to clear too many places.
• Clear three-dimensional corners: open some small grooves and some three-dimensional corners.
• The knife that is easy to break must be considered such as thin knife, too long, and excessive aluminum cnc machining volume (mainly z-direction, depth direction).
• Tool path: Use two-dimensional shape to walk, only small corners (R0.8) and two-dimensional plane angles can be cleared; use parallel tool paths; use contours of equal height; there is a kind of curved surface and shape that cannot be reached by the knife. Dead corners should be sealed first, and then the corners should be cleared. Small gaps in the large surface are generally sealed first.

Medium Light

1. Medium light: Steel and fine materials as curved surfaces are medium light.
2. Principle: There is a lot of allowance between layers when the knife is roughened. In order to obtain a better effect when the knife is polished,
3. Features: fast removal, large knife flying knife, large feed, large spacing; no need to worry about the surface quality; flat workpieces do not need to be in the light; workpieces with the same height shape do not need the middle light, when the contour shape is thick, it can be a little thinner Putting the two processes together, the finer point refers to the surface allowance and the distance between layers; whether medium light is required, another important factor is the material of the work, the harder the material, the medium light is considered; the cnc machining of medium light The direction and the roughness of the light knife are best relative to the processing of such things will have a good effect and uniformity.

Light Knife

The light knife is to meet the assembly requirements of various products and molds, so it must be very careful, and different tool path settings and parameter settings are given according to different requirements.

• The lower and final height of the light knife are changed to 0. The tolerance design is within 1 wire, and no filtering is required (the smaller the workpiece, the smaller the tolerance, and the tolerance affects the appearance).
• The front mold and parting surface should achieve the best finish, the rear mold can be inferior, and other non-matching and vacant positions can be rough.
• The tool path design is determined by the following factors: specific shape (such as plane and other surfaces), steep surface and flat surface. Whether there is a sharp angle between the two sides (the sharp angle is separated). Whether the requirements of the two parts are different (whether or not to leave a margin, how much the margin is, and the requirements for the finish are different).

The problem of protecting the surface in the light knife is a big problem. The processed surface must be protected from errors during processing and protected according to the requirements of the protective surface. Range protection, 0 protection regardless of error, height range and plane range; protection surface protection. For the extension of the tool path, in the light knife, it is best to use an arc to advance and retract the tool when the tool path is processed to the edge, otherwise the surface is slightly extended in advance. Knife lift problem in Light Knife. Carrying knives is a waste of time, so try to avoid carrying knives.

• Method 1: Set the knife clearance (small gap)
• Method 2: Cover, seal the knife handle (small gap)
• Method 3: Avoid gaps (large gaps)
• Method 4: When the shape of the same height is extended to the feeding problem of the same height, the feeding of the first knife must be from the outside of the workpiece to avoid vibration and damage to the workpiece. All smooth knives must be equipped with feeding.

Tool wear problem: When the workpiece is large, multiple knives are required to finish the same repid prototyping parts.

El torno CNC puede procesar normalmente, además del hardware de la máquina herramienta, el software del sistema y la herramienta más importante es la herramienta de corte CNC, la herramienta de corte CNC se utiliza para mecanizar la producción de herramientas importantes, herramientas de corte que incluyen cuchillas, herramientas de rectificado, barra de herramientas, mango, etc. Los tipos de herramientas de torno CNC son muchos, según el uso, se pueden dividir en herramienta de torneado de círculo exterior, herramienta final, herramienta de corte, herramienta de torneado de roscas y herramienta de torneado de orificios, según la estructura y dividida en integral, tipo de soldadura, máquina tipo abrazadera y tipo especial.

En este artículo,CNCMACHINING.ES, un fabricante de piezas de mecanizado CNC, le presentará las herramientas de torneado del torno de acuerdo con la clasificación de la estructura de la herramienta de torneado, la clasificación del material de la herramienta de torneado, la clasificación del proceso de la herramienta de torneado:

1. Clasificación por estructura de herramienta

• Estructura Integral de la Herramienta de Torneado: El cuerpo principal de la herramienta está hecho de una pieza en blanco sin separación, y es fácil de moler en un filo afilado. La herramienta tiene buena rigidez y es adecuada para herramientas de torneado pequeñas y procesamiento de herramientas de torneado de metales no ferrosos.
• Tipo de soldadura de la estructura de la herramienta de torneado: está conectado por el método de soldadura, y el cabezal de la herramienta y el portaherramientas están separados. La estructura es compacta y la fabricación es conveniente. Es adecuado para todo tipo de herramientas de torneado, especialmente para herramientas pequeñas que son más prominentes.
• Estructura de la herramienta de sujeción de la máquina: la hoja se fija en el portaherramientas con un soporte mecánico, y la hoja se puede reemplazar después de ser roma. Es una herramienta de uso común para tornos CNC, y el portaherramientas se reutiliza.
• Un tipo especial de estructura de herramienta de torneado: como herramientas compuestas, herramientas amortiguadoras, etc.

2. Clasificación por material de herramienta de torneado

• Herramienta de acero de alta velocidad: está hecha de acero de alta velocidad y se puede rectificar continuamente. Es una herramienta de uso general para desbaste y semiacabado.
• Herramienta de carburo cementado: herramienta de corte de carburo cementado: la cuchilla está hecha de carburo cementado, se utiliza para cortar hierro fundido, metales no ferrosos, plástico, fibra química, grafito, vidrio, piedra y acero ordinario, también se puede utilizar para cortar acero resistente al calor, acero inoxidable, acero de alta resistencia, acero para herramientas y otros materiales difíciles.
• Diamante: la hoja tiene incrustaciones de diamante, que tiene las ventajas de una dureza y resistencia al desgaste extremadamente altas, un coeficiente de fricción bajo, un módulo elástico alto, una conductividad térmica alta, un coeficiente de expansión térmica bajo y una afinidad baja con los metales no ferrosos. ser utilizado para materiales duros quebradizos no metálicos como grafito, materiales de alta resistencia al desgaste, materiales, aleación mecanizado de aluminio con alto contenido de silicio y otros materiales dúctiles de metales no ferrosos procesamiento de precisión.
• Otros materiales: como herramientas de nitruro de boro cúbico, herramientas de cerámica, etc., se están desarrollando en la dirección del mecanizado de desbaste y el corte interrumpido de fundición de aleación de alta dureza.

3. Clasificación por proceso de herramienta de torneado

• Herramienta de torneado externo: la herramienta de torneado externo de 93 grados se usa principalmente para procesar círculos externos y caras finales, y la herramienta de compensación de 35 grados se usa principalmente para perfilar contornos externos.
• Herramienta de torneado de orificios internos: la herramienta de torneado de orificios internos de 93 grados se utiliza principalmente para el mecanizado interno.
• Herramientas de torneado de roscas: Las herramientas de torneado de roscas incluyen principalmente herramientas de torneado de roscas externas y herramientas de torneado de roscas internas. Entre ellos, las herramientas de torneado de roscas externas se utilizan principalmente para el procesamiento de roscas externas, y las herramientas de torneado de roscas internas se utilizan principalmente para el procesamiento de roscas internas.
• Herramienta de ranurado: la herramienta de torneado de ranurado externo se usa principalmente para ranurado y corte externo, y la herramienta de torneado de ranurado interno se usa principalmente para el procesamiento de ranurado interno.

4. Herramientas comunes y selección de tornos CNC

Herramientas comunes para tornos CNC

Las herramientas utilizadas en los tornos CNC incluyen herramientas de torneado cilíndrico, taladros, herramientas de mandrinado, herramientas de corte, herramientas de roscado, etc. Entre ellas, las herramientas de torneado cilíndrico, herramientas de mandrinado y taladros son las más utilizadas.

Selección de herramientas

1. En la producción real, la herramienta de torneado CNC se determina principalmente a partir de la muestra de la herramienta de acuerdo con el tamaño de la instalación de la herramienta, el material de la pieza de trabajo, el tipo de procesamiento, los requisitos de procesamiento y las condiciones de procesamiento del portaherramientas giratorio del torno CNC. Los pasos son aproximados de la siguiente manera:
2. Determine el material de la pieza de trabajo y el tipo de mecanizado (excírculo, orificio o rosca);
3. Determinar el grado y la geometría del inserto de acuerdo con los requisitos de desbaste y acabado y las condiciones de procesamiento;
4. Elija un soporte según el tamaño del soporte, el tipo de hoja y el tamaño.

Instalación de herramientas

Después de seleccionar la cuchilla y el vástago apropiados, primero instale la cuchilla en el vástago, luego instale el vástago en el portaherramientas rotativo y luego verifique el tamaño de instalación de la herramienta a través del diagrama de interferencia de la herramienta y el diagrama de carrera de mecanizado laton.　

5. Asuntos que requieren atención

Se debe prestar atención a los siguientes problemas durante la instalación de la herramienta:

1. Antes de la instalación, asegúrese de que el eje y la superficie de posicionamiento de la hoja estén limpios y sin daños;
2. Al instalar el portaherramientas en el portaherramientas, asegúrese de que la dirección del portaherramientas sea correcta;
3. Al instalar la herramienta, asegúrese de que la punta de la herramienta esté más alta que el centro de rotación del husillo.

Project name：Yacht model

Material: ABS engineering plastics

Process: CNC machining

Post treatment: Painting, plating

Qty: 1 set

Advantages: high precision, fast speed and high processing efficiency

Production cycle: 15 days

Project requirements:

1. Precise proportion: The yacht model is made in 1:40 scale

2, perfect assembly, fine surface treatment, smooth lines of finished products and even colors

Project Background

The birth of a yacht begins with a drawing. After a rigorous review, the model of the yacht is produced. This is the conceptual model of the yacht. The customer can easily make the appearance review by making the yacht model.

Project pre-stage analysis:

After receiving the design drawings sent by the customer, the production department holds a preliminary analysis meeting, and through the cooperation of various departments, detailed analysis of each problem that the product needs to pay attention to.

Process and material selection:

The hull and superstructure are mostly made of ABS engineering plastics as raw materials, and some small parts are made of metal stainless steel. Most of the manufacturing processes are done by ABS CNC machining. After processing, the model needs to be post-treated by grinding, painting, electroplating, etc. to enhance the appearance of the model.

Production process:

1. Disassemble and check the overall matching degree of the components: Combine with the CNC machining process, split the model to ensure that the components of each level can be processed; with the help of the software, the pre-analyst optimizes the assembly of the drawings and verifies the feasibility of the drawings. .

Disassemble and check the overall matching degree of the components

2. Programming on the machine: After preliminary analysis, programmed on the machine. In order to ensure that all parts can be finely processed, we carry out precision abs plastic machiningthrough the industry-leading CNC processing equipment to ensure the high precision of the product.

Programming on the machine

3. After the machining is completed, the rough assembly is carried out: After the cnc model makingis completed, the parts are rough-assembled and necessaryly polished to ensure that the products are assembled correctly before painting.

rough assembly

4. Fine post-processing: according to the customer's specified requirements, the finished parts are polished, painted, electroplated and other post-treatment processes.

Finely polished by hand

Finely polished by hand

paint

Paint

Fine post-processing

5. Strict quality inspection: Each component is inspected by the project manager and transferred to the quality inspection department who checks again to ensure that the product has no any quality problems.

Strict quality inspection

Strict quality inspection

Strict quality inspection

6. Beautiful finished products

Beautiful finished products

Duch Group can provide customers with CNC processing, 3D printing, product appearance processing (grinding, polishing, vacuun casting, spraying, silk screen, pad printing, electroplating, laser engraving, wire drawing, etc.) small batch personalized product customization, mass production and other services, which can help customers quickly verify the appearance of the product, help customers achieve high-quality sample manufacturing and rapid manufacturing. If you have the above needs, please contact us!

HASCO is a leading European manufacturing company for moulding services and moulds, and is considered to be the standard maker for European moulds. The company recently developed a Quick-Change Mold System. This enables injection moulding manufacturers to quickly and effectively replace their moulds to reduce the time and cost of resetting their machines. Mould printed by Stratasys 3D Printer makes the whole process cheaper. It can make cnc prototyping china samples faster and cheaper, or make small batch production with reasonable cost.

Duch Group provide customers with competitive solutions such as rapid prototype, mass production, small batch production, 3D printing, mold making, and injection molding. With more than 20 years of extensive production experience in the rapid prototyping china industry, it is the world's largest rapid prototyping service company.

With the development of science and technology, people's requirement for parts processing quality is becoming higher and higher. At the same time, product modification is frequent. In general mechanical processing, single and small batch products account for an increasing proportion. In order to ensure product quality, improve productivity and reduce costs, machine tools are required not only to have good versatility and flexibility, but also to have a high degree of automation in the process of processing. cnc machining technology is a kind of high-efficiency and flexible automatic processing technology developed under this environment, which is controlled by digital information of NC machine tools. It is suitable for high-precision, complex parts and small and medium-sized batch production.

CNC machine tool is an efficient and flexible mechanical-electrical integration equipment which integrates computer technology, modern control technology, sensor detection technology, information processing technology, network communication technology, hydraulic pneumatic technology, optical and mechanical technology, and it is the basis of modern manufacturing technology.

1. Composition of NC Machine Tool and NC Machining Process

CNC machine tools refer to the machine tools that use digital information recorded in the media to control the machine tools through the CNC device, so that it can automatically implement the specified processing process.

1) Composition of CNC Machine Tools

NC machine tools automatically process workpieces according to pre-programmed processing procedures. CNC machine tools are usually composed of machine body, servo system, CNC device and control medium, as shown in Figure 2-61.

Figure 2-61 Composition of CNC Machine Tool

Control medium. Control medium, also known as information carrier, is an intermediate medium which conveys the operation intention of human to CNC machine tools. It contains all the information necessary to process a part. Commonly used control media are perforated tape, magnetic tape, disk and other carriers that can store instruction information. For the short NC processing program, the NC device can be input directly through the keyboard on the NC operation panel.

NC device. CNC device is the center of CNC machine tool. It receives the information from control medium, and converts it into pulse signal to control machine tool action.

Servo system. Servo system is a device which connects the moving parts of machine tool with CNC system, including servo drive mechanism and movable parts of machine tool. It is the executive part of CNC system of machine tool. It transforms the impulse signal from CNC device into the movement of machine tool parts, so that the worktable or tool holder can be positioned accurately or moved strictly according to the expected trajectory, and the parts meeting the requirements of the drawings can be machined.

Machine tool.  Machine tool is the mechanical part of NC machine tool. Besides the general parts such as main drive device, feed drive device, bed, worktable and auxiliary part, there are also special parts, such as tool storehouse, automatic tool changer and rotary worktable.

NC Machine Parts Processing Process

The NC machine tool parts processing process is that the operator first changes it into the content of manufacturing process according to the processing pattern. On the basis of familiarity with the processing technology, the processing program is compiled, and the human will is transformed into the acceptable information of CNC machine tools with the prescribed code and program format. Record information on control media (such as punched tape, tape or disk) to make it an instruction for controlling machine tools. After the input information is processed by the NC device, the command pulse is sent to the servo system of the coordinate axes of the machine tool to drive the corresponding moving parts of the machine tool, and other actions such as speed change, tool change and machine shutdown are controlled to automatically process the workpiece that meets the requirements of the drawings.

Classification of 2 NC Machine Tools

CNC machine tools can be classified according to process use, locus of motion, control mode and so on. This paper only introduces the classification according to process use. CNC machine tools are classified according to their processing characteristics or main processing procedures. They are mainly CNC lathes (including turning centers), CNC milling machines (including milling centers), CNC boring machines, CNC machining centers, CNC grinding machines (including grinding centers), CNC drilling machines (including drilling centers), CNC broaching machines, CNC planer, CNC cutting machine, CNC gear processing machine and CNC EDM machine (including EDM center, etc.). Figure 2-62 shows the appearance of CK50 NC lathe. Its processing range is the same as that of ordinary lathe. It mainly processes rotational parts such as shafts and discs. Figure 2-63 shows the appearance of XJK125 NC milling machine. It is especially suitable for the processing of complex parts. It can complete milling, drilling and boring.

Figure 2-62   CK50 CNC lathe appearance chart

Figure 2-63   XJK125 CNC Milling Machine Appearance Diagram

Machining center (MC) is a kind of NC machine tool for multi-process machining of workpiece. It has a tool library and an automatic tool changer (ATC). After the workpiece is clamped once, under the control of the NC system, the machining center can automatically select and change the cutting tools according to different processes; automatically change the spindle speed, feed rate and the movement track of the tool relative to the workpiece and other auxiliary functions; sequentially complete the multi-process processing on several surfaces of the workpiece. Therefore, it reduces the time of workpiece clamping, measuring and machine adjustment, shortens the time of workpiece storage and handling, improves productivity and machine tool utilization, and it is an important development direction of CNC machine tools. Figure 2-64 shows the layout of JCS-018 machining center. Its shape is similar to that of vertical milling machine. There is a sliding seat 2 on the bed 1, and it moves horizontally (y axis direction). Workbench 3 moves longitudinally on the slide seat (x-axis direction). There are frame pillars 5 at the back of the machine tool. The spindle box 9 makes vertical lifting motion (z axis direction) on the column guide rail. The left and right parts of the column are the NC device 6, the left front part is equipped with the tool storehouse 7 and the automatic tool changing manipulator 8, and the left lower part is equipped with the lubrication device 4. There are 16 cutters in the tool library, which can complete all kinds of hole processing and milling. There are 16 cutters in the tool library, which can complete all kinds of hole processing and milling. The NC operation panel 10 is suspended in front of the operator's right for easy operation. The working state of the machine tool is displayed on the panel. Machining centers are usually divided into horizontal, vertical and universal machining centers according to the spatial position of the spindle during processing.

Figure 2-64   JCS-018 Machining Center Layout

machine tool body; 2-slide seat; 3-worktable; 4-lubrication device; 5-pillar; 6-NC device; 7-tool library; 8-tool changing manipulator; 9-spindle box; 10-operation panel

3 Programming

The so-called programming means that the process, process parameters, tool movement and direction and other auxiliary actions (tool changing, cooling, clamping, etc.) of parts are compiled into tables according to the sequence of movement and the instruction code and program format given by the NC machine tools used. This form is called "parts processing program sheet", or simply "procedure sheet". Then, all the contents of the program sheet are recorded on the control medium (such as perforated tape, tape, etc.), and then transmitted to the NC device to direct the NC machine tool processing. The whole process from the analysis of part drawings to the production of control media for NC machine tools is called programming.

Generally speaking, the steps of NC programming are: process design→numerical calculation→preparation of parts processing program sheet→preparation of control medium or program input→program verification and trial cutting.

1) Process design

On the basis of comprehensive analysis of part drawings, the clamping and positioning method, processing route (such as tool setting point, tool changing point, feed route), tool and cutting parameters (such as feed speed, spindle speed, cutting width and cutting depth) are determined.

2) numerical calculation

According to the part drawing and the determined processing route, the tool trajectory is calculated.

The general NC device has the functions of linear interpolation and circular interpolation. For processing simple parts consisting of arcs and straight lines, only the coordinate values of the intersection or tangent points (base points) of adjacent geometric elements on the contour of the part are calculated, and the starting and ending points of the straight line, the starting and ending points of the arc and the coordinate values of the center of the circle can be obtained. When the shape of parts is complex and the interpolation function of NC devices is inconsistent, more complex calculations are needed.

3) Writing Procedure Sheet for Parts Processing

According to the calculated coordinates of tool path, the determined cutting parameters and auxiliary actions, and the instruction codes and program formats prescribed by the NC system, a part processing program sheet is compiled.

4) Preparing control medium or program input

After the program sheet has been written, the operator or programmer must input the processing information into the NC device. According to the different input and output devices of the NC system, the program can be moved to some control medium first. Commonly used control media are U disk, disk, tape and so on.

Program Checking and Trial Cutting

The program must be checked and tested before it can be used formally. The method of checking is to input the contents of the control medium directly into the NC device to check whether the tool's trajectory is correct or not. On the CNC machine tool with CRT graphics display screen, the program checking and trial cutting can be carried out by simulating the cutting process of the workpiece; otherwise, the pen can replace the knife and coordinate paper can replace the workpiece, so that the machine tool can run and draw the processing trajectory.

These methods can only check whether the tool's motion path is correct or not, and can not check the machining accuracy. Therefore, the trial cutting of parts should also be carried out. If it is found that the accuracy of the parts can not meet the requirements through trial cutting, the program sheet and the control medium should be modified, and the error compensation method should be adopted until the qualified parts are processed.

4. Characteristics and Application of CNC Machine Tools

1) Characteristics of CNC Machine Tools

(1) High processing accuracy and stable processing quality. Because of the high manufacturing accuracy of CNC machine tool and the automatic processing according to the scheduled program, the artificial operation error is avoided, the consistency of the same batch of parts is good, and the product quality is stable.

High productivity. Because many parts can be processed in one clamping process, many intermediate processes (such as marking) are omitted. Generally, only the first piece inspection is needed, which greatly shortens the production preparation time, so the productivity is high.

(3) The high degree of automation reduces the intensity of labor and improves the working conditions. Except for the manual clamping of the blank, the whole processing process is automatically completed by the machine tool, which reduces the labor intensity of the operator and improves the working conditions.

(4)It has strong adaptability and good economic benefit. When the processing object is changed, the NC program can be redesigned without redesigning tools, fixtures and moulds. This greatly shortens the product development cycle and provides a shortcut for the development of new products. At the same time, the processing accuracy is high, the quality is stable, the waste rate is reduced, the production cost is reduced, and the productivity is high, so good economic benefits can be obtained.

(5) It is conducive to the modernization of production management. By using NC machine tools, the processing time of parts can be accurately calculated, and the management of inspection, fixture and semi-finished products can be effectively simplified, which is conducive to the modernization of production management. Because of the use of digital information, it is easy to form an integrated computer aided design and manufacturing system.

However, the cost of CNC machine tools is high, the technology is complex and the maintenance is difficult, which requires higher quality of management and operators.

Application of NC Machine Tool

CNC machine tools are widely used, especially suitable for processing parts with the following characteristics: multi-variety, small batch production parts; parts with complex structure and high precision requirements; parts with frequent modifications. CNC machine tools can save a lot of tooling costs, reduce the overall cost. It is expensive, and it does not allow scrap of key parts; urgent parts with the shortest production cycle are needed.

HASCO is a leading European manufacturing company for moulding services and moulds, and is considered to be the standard maker for European moulds. The company recently developed a Quick-Change Mold System. This enables injection moulding manufacturers to quickly and effectively replace their moulds to reduce the time and cost of resetting their machines. Mould printed by Stratasys 3D Printer makes the whole process cheaper. It can make cnc prototype china samples faster and cheaper, or make small batch production with reasonable cost.

Duch Group provide customers with competitive solutions such as rapid prototype, mass production, small batch production, 3D printing, mold making, and injection molding. With more than 20 years of extensive production experience in the rapid prototype service china, it is the world's largest rapid prototyping service company.

QINGGONG MACHINER with KT series high-performance turbines, the sand blasting machine parts has blasting wheels provided with eight throwing blades locked into the wheel double-disc. The double-disc wheel offers the following advantages:

Abrasive

Abrasive, the blasting materials, it depends on what kind of material you need to blast cleaning, this is the first things first for the blasting media' choice. We have steel shot, steel grit, and steel cut wire shot.

Advantages of abrasive

Uniform particle size, good cleaning effect, low dust, low hollow, tight internal structure, high wear resistance, high life, moderate hardness, good strength

Our company has shot blasting machine spares. And the shot blasting prices are reasonale and competitive.

According to its working principle, shot blasting machines can be divided into two types, that is, wheel blasting and air blasting. QINGGONG MACHINERY sand blasting machine manufacturers a variety of shot blasting machines to meet your different needs. According to the industry, different types of shot blasting machines can be chosen from. To learn more, you may see the “Industry” applications. Contact us to get more information about our shot blasting machine products.

Shot Blasting Machine

QINGGONG MACHINERY shot blasting machine offers you an effective solution to deal with the surface of the workpieces, including remove the contaminant on the surface, clean and roughen a smooth surface before applying a primer or coating to the workpiece. More specifically, the treatment of a shot blasting machine includes derusting, descaling, desanding, or deburring of the workpieces. Other uses are such as surfaces shot peening, finishing, and roughening of surfaces so as to make coat better.

CNC punch press machine is the machine that performs the punching, the operation that serves to make holes and cuts in the metal sheet. The turret punching process is the best alternative to laser cutting for its balance between price and quality, as long as the geometry of the piece allows it. CNC machines are programmed with a design which can then be manufactured hundreds or even thousands of times. Each manufactured product will be exactly the same. CNC machines can be programmed by advanced design software such as Pro/DESKTOP®, enabling the manufacture of products that cannot be made by manual machines, even those used by skilled designers/engineers.

Qinggong MACHINERY has 3 types  cnc turret punch machine, including servo CNC turret punching machine, mechanical CNC turret punching press machine and hydraulic CNC turret punching machine.

Details about CNC Turret Punch Press

The main transmission of servo cnc turret punch press machine is directly from drive servo motor, which retains the advantage of a simple and reliable structure as mechanical transmission, it features  high efficiency, energy saving, low noise, high accuracy, and can realize many processes like die-cutting, forming, beading, lettering and so on.

Mechanical CNC turret punching machine by the programming software (or manual) processing program, by the servo feeding mechanism sent the plate material to the required processing position, at the same time by the die selection system select the appropriate die from the turret, by the mechanical power system according to the procedure of punching, automatic completion of the workpiece processing.

The driving system of the Y30 series CNC turret punch machine is hydraulic, with low noise, high speed, and high efficiency, and the thickness of the punching plate is 6mm. The design of high precision and high repetitive positioning accuracy enables the machine to produce more high-precision parts than other similar machines.

We have turret punch for sale, CNC punching machine price is reasonale and competitive.welcome to buy.

Shot Blasting Machine

QINGGONG MACHINERY shot blasting machine offers you an effective solution to deal with the surface of the workpieces, including remove the contaminant on the surface, clean and roughen a smooth surface before applying a primer or coating to the workpiece. More specifically, the treatment of a shot blasting machine includes derusting, descaling, desanding, or deburring of the workpieces. Other uses are such as surfaces shot peening, finishing, and roughening of surfaces so as to make coat better.

1. The CNC rebar bending machinemust have product specifications, certificates of conformity and maintenance records, it should be installed on a stable ground, and its cable insulation is good. Zero protection should be reliable. There should be enough sites for stacking steel reinforcement around the machine.
2. Both the belt pulley and the exposed gear must have a protective cover.
3. Before using, it is necessary to check whether the shock protector works effectively, whether the blade has cracks, and we also should make sure that the nut for fixing the blade is firm and not loose.
4. When the rebar bending and cutting machinedoes not reach the normal speed, it can not cut the material. When cutting the material, the operator's hand should only be placed on the side of the rebar which is near the worker's body, and the two ends of the rebar should not be cut with both hands. When the long rebar is cut off, the other side should be especially helped by a professional person to stabilize the reinforcement.
5. When operating, we should use both hands to hold the reinforcing brand aim at the edge of the knife. When the blade comes down and we feels a little press, it is necessary to press the steel bar immediately, so as to avoid hitting the end with the end up.
6. When cutting short material, the length of one part which held in the hand should not be less than 40 cm, and the distance between the hand near the blade and the blade should be kept more than 15 cm. If the part which held by hand is less than 40 centimeters, the short rebar must be pressed down by the casing to prevent injury when cutting.
7. The cutting materials should be cleaned in time. It should be stacked in order according to different specifications.
8. When we operate the machine, it is strictly prohibited to use hand to remove the broken ends and debris near the edge of the knife directly. The people around the machinery who are not professional are not allowed to stay.
9. It is forbidden to cut rebars and red-burning rebars whose diameters exceed the mechanical regulations. When multiple bars are cut off at one time, the section of rebars must be converted.
10. When it is found that the mechanical operation is abnormal or the abnormal sound or the blade is skewed, the machine should be stopped immediately. Workers should pull the sluice to break the power, report the repair of the machine repair personnel, and not repair it without authorization.
11. Operators at night should have adequate lighting, the height of lamps and lanterns is not less than 5 meters and their bulbs should be protected and they should be outside the dangerous areas on both sides of the factory.

3-axis CNC router is an entry-level engraving machine that can meet machining requirements without high procurement and maintenance costs. As one of the basic type and best selling CNC router, 3 axis cnc wood router is easy to operate, and wide range of applications. Besides that the 3 axis wood cnc machine is applicable to produce the cupboard door, solid wood door, computer table, panel furniture and so on. With the advantages of low-cost and wide usage, it is used for the works of high-density boards with large area and production, plane engraving, cutting, 3D carving, etc.

Blue Elephant 3 axis CNC router working area and x, y, z working distance all can be set on your request. It is the best choice for processing non-metallic materials. Blue Elephant CNC provides high-quality 3 axis cnc router for sale and reasonable 3 axis cnc router price.

BLUE ELEPHANT is an enterprise with high-advanced technology, specializing in the r&d and manufacturing of nesting CNC router. If you want to know more details or want a quotation, just feel free to contact us!

Qingdao Qinggong Machinery delivered the steel pipe shot blasting machine to Mexico.

This customer want to blast steel pipes, the diameter of pipes from 1’’ to 18’’, length from 3m to 9m. And he want to use 1 machine to blast those steel pipe.

According to the customer requirements and steel pipes information, we advise customer use roller conveyor shot blasting machine.

Roller conveyor shot blast cleaning machine can blast different size pipes, and one time can blast many pipes, has high work efficiency.

1. Opening size: 2000mm*600mm

2. Blast turbines: 6*11kw

3. Total length: 26m

4. Dust collector blower: 2*15kw

Roller conveyor shot blasting machine not only blast steel pipe, but also can blast steel plate, h-beam, steel structure, trailer, tank and others.

QINGGONG MACHINERY is a professional china shot blasting manufacturer, Please consult with our engineer team if you require a multi-purpose shot blasting machine, our engineer team will give you the most professional and cost-effective solutions according your actual situation.

We have 4 axis cnc router for sale! 4 axis CNC router for full automatic 3D machining of carving, engraving, marking, cutting, turning, drilling, milling or grooving. 4 axis CNC woodworking machines are available for wood (softwood, hardwood, solid wood, plywood, MDF),fabric, leather, PVC. And 4 axis cnc woodworking machine are widely used in industrial manufacturing applications, school education, small business, home business, small shop and home shop. And it is designed for processing a more complex figure and do advanced working. 4 axis engraving machines with X, Y and Z axis rotation axes (fourth axis). Mainly offer the solutions for column material processing, such as newel post, handrail, chair jamb, baluster.

Blue Elephant CNC 4-axis router is mainly divided into two types. One is to add a rotating device to the ordinary 3 axis cnc router , and the other is that the spindle of the machine itself can swing 180 degrees. And the cnc router machine price is reasonable.  

BLUE ELEPHANT is an enterprise with high-advanced technology, specializing in the r&d and manufacturing of nesting CNC router. If you want to know more details or want a quotation about blue elephant cnc, just feel free to contact us!

5 axis CNC machine is also called 5 axis CNC router, 5 axis CNC machining center,  5 axis cnc wood carving machine, 5 axis CNC milling machine or 5 axis cnc wood carving machine. 5 axis CNC router is somewhat like the 3/4 axis CNC router, but 5 axis cnc routers has two additional axis they can move along. These additional axis allow for shorter project time due to their capability of cutting five edges of the material simultaneously. They are designed for trimming formed parts, patterns or molds using five-axis simultaneous motions and smaller applications to larger aerospace and composite applications utilizing large/heavy fixtures. And widely used in large automotive molds, Styrofoam mold, cartoon character statue, garden three-dimensional sculpture, casting mold wood mold, lost mold, plastic mold, luggage mold, ceramic mold development and other high-precision three-dimensional products processing.

We have 5 axis cnc router machine for sale ! Blue Elephant is one of the most professional 5 axis cnc router manufacturers in China. Blue Elephant CNC 5 axis router is with an extra heavy duty gantry and machine table for maximum rigidity and strength to provide high-speed machining in all 5 axis. If you are interested in our 5 axis cnc router for sale, please leave a message or contact us directly. We’d like to provide you with 5 axis cnc router price information.

BLUE ELEPHANT is an enterprise with high-advanced technology, specializing in the r&d and manufacturing of nesting cnc machine. If you want to know more details or want a quotation, just feel free to contact us!

Linear ATC CNC router can be used for automatic engraving, cutting, drilling, milling, grooving, sanding, polishing for solid wood, cork, hardwood, plywood, foam, stone, ceramic, plastic, acrylic, glass, MDF, ACM, PVC, copper, brass, aluminum and other soft metals. ATC CNC machinery usually requires 3 axes to complete the engraving work, called X, Y and Z. The X axis is horizontal, the Y axis is vertical, and the Z axis is perpendicular to the other two axes. The spindle holds the tool and moves along the X, Y and Z axes, following the tool path generated by the software. In addition, there are some ATC CNC Router+4 axis engraving machines with X, Y and Z axis rotation axes (fourth axis). These CNC router engraving machines are mainly used for some cylindrical engraving and cutting work.

Blue Elephant atc cnc router machines have an automatic tool change function including carousel tool change type and linear tool change type. According to the processing requirements, automatic tool change can be realized without manual participation, which further improves the machining efficiency. To know ATC CNC router machine price information, you can leave a message through our website or directly call us.

BLUE ELEPHANT is an enterprise with high-advanced technology, specializing in the r&d and manufacturing of nesting cnc. If you want to know more details or want a quotation, just feel free to contact us!

This engraving machine is a typical 3-axis ATC CNC engraving machine. With a linear tool magazine design, different tools can be installed and can be automatically changed to meet different machining requirements, thus greatly improving work efficiency. In addition, adopting the Italian HSD air-cooled spindle, no need to connect the water pump, and it is easy to use. Therefore, this machine is the first choice for customers in water shortage areas.

ELECNC-2040 Linear ATC Wood CNC Router Machine Features:

Compare with 2040 Carousel ATC CNC Router Machine, this kind of machine was designed with linear type tool magazine;

Different from 3 Axis CNC, different knife can be installed in tool holder. The tool can change automatically to process different patterns of objects; In that case, the working efficiency can be greatly improved;

With Italy HSD air cooling spindle, and the working speed can reach to 24000RPM for per minutes;

The machine is one of typical 3 Axis ATC CNC Machine. If you want to do 3D processing, 1530-4A Woodworking CNC Router Machine is more suitable. Because the rotary spindle can swing 180 degree;

Compare with 4*8 CNC Router Machine, the working size and processing area are larger. Also, the working efficiency can be greatly improved;

With T-slot and vacuum working table; with 6 zones to help you to fix the material, and increase the utilization rate;

ELECNC-2040 Linear ATC CNC router Machine Parameter：

ELECNC-2040 Linear ATC Wood CNC Router Machine Sample & Application

Wood-working industry: Ideally suitable for furniture decoration,musical instruments,wooden crafts,solid wood furniture,MDF paint-free door,wood composite door,cabinet,kitchen doors,windows,night table,etc.

Decoration industry: Art model,Wall Art,screen felief engraving and cutting,decoration processing,gifts wrapping,waved plate,electrical cabinets panels,sports equipment,and other wooden industrial products.

Advertisement: Acrylic,double color plate,PVC,ABS board,aluminum plate,density board,artificial stone,organic glass,soft metals like aluminum and copper,cut matrix,character,signs,trademar. Application

BLUE ELEPHANT is an enterprise with high-advanced technology, specializing in the r&d and manufacturing of cnc router furniture. If you want to know more details or want a quotation, just feel free to contact us!

Jinan Blue Elephant CNC Machinery co ltd.

Tel: + 86-531-80983066

Fax: +86-531-80981766

Mobile/What's app/Wechat:

+86-150 6402 6772

Email: manager@nestingcnc.com

Office Address: 15A03, J1 Office Building, Gaoxin Wanda Plaza, Gaoxin District, Jinan City, Shandong Province, China.

Factory Address: NO.1888 Chunbo Road, Gaoxin District, Jinan City, Shandong Province, China.

BLUE ELEPHANT is an enterprise with high-advanced technology, specializing in the r&d and manufacturing of cnc machine furniture. If you want to know more details or want a quotation, just feel free to contact us!

EPS CNC Styrofoam router machine adopt integrated casting machine body by well heat treated, which makes machine more stable, rigid, endurable. Adopting Imported high-precision ball screw and Taiwan HIWIN linear square rails, which ensure the machining precision. Especially with a wider travel distance, which is designed for large scale production and suitable for EPS, casting wood mold, engineering plastics and other non-metal material mold.

Blue Elephant EPS CNC router with many optional configuration and service available. According to your requirement, different configurations of foam carving machine will be offered. For example, the Z axis can be heighten, and the whole working size also can be customized.

BLUE ELEPHANT is an enterprise with high-advanced technology, specializing in the r&d and manufacturing of nesting CNC router. If you want to know more details or want a quotation, just feel free to contact us!

Equipped with a pushing device, this machine can automatically pushes the plate off the processing table, which is convenient for the operator to take the material. With the double-station equipment and uninterrupted processing, which can greatly saving time and realize maximum productivity. In addition, the machine can achieve an optimized layout to achieve the processing of shaped materials, so that the sheet utilization rate is as high as 95%.

ELECNC-1325 cnc machine for wood furniture Features:

Good effect of processsing:High precision , cutting material very smoothly , Automatic design , automatic classification, without human intervention.

Improve work efficiency:Auto feeding materials, automatic layout optimization , improve material utilization. and this is one of the typical features of Wooden Furniture CNC.

Save working time:Automatic feeding , save the time of labor , no human intervention , minimizing error rate to minimum , ensure the quality of the order.

User friendly Machine control interface design. Workers can operate the machine expertly just by simple training.

ELECNC-1325 Auto Feeding Furniture Production Line Parameter：

ELECNC-1325 Auto Feeding Furniture Production Line Sample & Application

Wood furniture industry： Doors; Cabinets; Tables; Chairs.Wave plate, fine pattern, antique furniture, wooden door, screen, craft sash, composite gates, cupboard doors, interior doors, sofa legs, headboards and so on.

Advertising industry： Signage; Logo; Badges; Display board; Meeting sign board; Billboard Advertising filed, sign making, acrylic engraving and cutting, crystal word making, blaster molding, and other advertising materials derivatives making.

BLUE ELEPHANT is an enterprise with high-advanced technology, specializing in the r&d and manufacturing of nesting cnc machine. If you want to know more details or want a quotation, just feel free to contact us!