Every summer is the season of trouble for major factories and workshop managers. Why are we saying this? The current workers' treatment requirements have been improved, and the work environment without central air conditioning or environmental air conditioning work has caused a shortage of employment. The installation of central air-conditioning will increase the cost of corporate expenses, which is a lot of money. Not every business can afford the cost of expensive central air conditioning. What about the large workshops where air conditioners cannot be installed? The times are changing, is technology solved?

Our company believes that business owners can install big air industrial fan for their own factories and workshops. This is the best solution for both. Compared to central air conditioning, the cost of installing big air industrial fan is much lower. So what are the advantages of large industrial fans?

1. The big air industrial fan specifically solves the problem of high space ventilation and cooling;
2. The big air industrial fan needs up to 1.5 kWh per hour;
3. The big air industrial fan has a large coverage area and low overall input cost;

The company specializes in the production and manufacture of the best industrial fan, and produces and sells industrial fans, industrial fans, big air industrial fans, industrial ceiling fans, industrial large ceiling fans, and large industrial ceiling fans. When you buy a big air industrial fan, our company is a good choice.

Company Profile

Jiangsu Gaxiao, one of the professional commercial fan manufacturers is located in Suzhou, Jiangsu province, China. Since its inception, Gaxiao has always been committed to the development and high volume low speed industrial fans. Adhere to the corporate purpose: down to earth, technology-oriented, focus on quality, brand name service!

Extra large industrial ceiling fans are kind of fan which is widely used in large industrial workshop, logistics warehouse, waiting room, exhibition hall and other high and large space. It is an industrial cooling equipment for space ventilation and cooling. The overall design of this extra large industrial ceiling fan has been accurately calculated to produce the best effect of the breeze in line with the human body's best feeling. Moreover, the maximum operating power of each fan is only 1.5 kw, and only 12 yuan is required for 8 hours per day.

1. Personnel cooling:

Extra large industrial ceiling fans (#hvls fan #high volume low speed industrial fans#industrial ceiling fan #ceiling industrial fan) change the traditional way of cooling the human body directly by fans. The natural breeze produced by industrial fans blows on the human body and promotes the evaporation of sweat to take away heat, thus cooling the human body and bringing the feeling of cooling. Usually, this cooling sensation can reach 5-8 degrees Celsius. The three-dimensional natural wind blown by the super-large energy-saving fan is more comfortable, because on the one hand, the three-dimensional wind blows the human body in an all-round way, so that the evaporation area of the human body reaches the maximum. On the other hand, human beings have accumulated a kind experience of natural wind in nature. Once there is a natural breeze with variable wind speed, the human body will naturally feel extremely comfortable and cool.

2. Natural ventilation:

In previous ventilation schemes, people often decided which products and quantity to use according to the number of ventilation in space. This effect is very obvious in a small space. You can even see the steam in the bathroom drain out quickly with the operation of the negative pressure fan. But in the large and wide enclosed space, the ventilation effect is not obvious. Smoke, moisture, carbon dioxide, and poor-quality air are still concentrated at the bottom of the building. Roof negative pressure fans have no effect on the air in all corners, but the people and equipment are there.

3. Dehumidification and dehumidification:

Super-large energy-saving fans can solve this problem: the advantage is that they are direct and effective! It promotes air mixing throughout space. Other benefits are the elimination of birds and bedbugs, as well as the avoidance of noise and decay caused by humidity from other ventilation schemes.

Gaxiao is a one of the professional industrial ceiling fan manufacturers in China with our own R&D team, we are always ready to help you increase air circulation and reduce energy cost.   

When choose industrial fans, the user maybe confused, and do not know which kind is better. While a good industrial fan is not only meeting performance requirements,but also involving safety and noise.

Five safety standards for large industrial fans as follow:

1. Check whether the motor head and the whole machine will shake when rotating in low and medium speed gears, especially in high speed gears.

2.After a long period of high speed rotation (at least 1 hour later),perceive the heat generating from the front shell of the industrial fan by hand or other instruments. If it feels very hot, it indicates that the industrial fan motor has poor heat dissipation performance.

3, look at the speed, power, air volume, noise and other parameters (industrial fan speed, power, air volume and noise is proportional, that is to say, the higher of fan speed, the power and air volume are greater,  the noise will also become larger,part ventilation cooling effect is better).

4, see whether there is intermittent pause in high speed rotation around the head, whether the head is not in place.

5. Gaxiao industrial fan is designed with brand-new mortise and tenon structure connection mode, which has the function of real anti-collision.

Then, we need to observe the industrial fan noise. What are the sources of noise?

1.Vibration. If the rotor of the fan rotates, the rotor's physical center of mass and the center of inertia of the rotating shaft are not on the same axis, it will lead to the imbalance of the rotor.The close distance between the physical center of mass of the rotor and the center of inertia of the rotor is called eccentricity, and the imbalance of the rotor will result in eccentricity. When the rotor rotates, a force acting on the support of the rotor will be generated due to the action of centrifugal force, resulting in vibration, and vibration will be transmitted from the base path to all parts of the machinery.

2.Wind noise. At the rotating of large industrial fans, the blades are periodically subject to the pulsating action, resulting in noise;On the other hand, the blade itself and the pressure on the blade are not evenly distributed, so it is easy to disturb the surrounding gas and parts during the rotation, which also constitutes the rotation noise.In addition, vortex noise is generated by the pulsation of pressure distribution on the blade , which is due to gas flowing through the blade generating the turbulent attachment layer, vortex and vortex separation.The noise of these 3 reasons can be called  "cut wind noise", the fan with general wind & big wind pressure, its cut wind noise is bigger also.

3. Abnormal sound, wind noise sounds like just the wind, but the abnormal sound is different, during the rotating of industrial fan, if except to the wind, there are still other sounds, you can judge the industrial fan has abnormal sound.Abnormal sound may occur due to foreign matter or deformation in the bearing, collision for improper assembly, or uneven winding of the motor resulting in looseness.The service life of fan is working time of radiator product working normally without breakdown , high grade industrial fan use life can achieve tens of thousands hours commonly.

The size of noise when the fan works, affected by many factors, the unit is decibel (dB).When measuring the large fan’s noise, it shall be carried out in the muffler room with noise less than 17dB, one meter away from the fan, and aligned with the fan's air inlet along the direction of the fan shaft, and measured in A weighted way.

4. The spectral characteristics of industrial fan noise are also very important. Therefore, it is necessary to record the noise frequency distribution with a spectrograph. Generally, the noise of the fan should be as small as possible and there should be no abnormal sound.Fan noise is related to friction and air flow.Fan rotate speed is higher, wind quantity is bigger, the noise that causes also can be bigger, the element of fan’s vibration also cannot ignore additionally.Of course, a high-quality fan will have very little vibration of its own, but the first two are difficult to overcome.To solve this problem, try using a larger fan.In the case of the same air volume, the working noise of the large fan at a lower speed should be less than that of the small fan at a higher speed.

Gaxiao is a one of the professional industrial ceiling fan manufacturers in China with our own R&D team, we are always ready to help you increase air circulation and reduce energy cost.  

Company Profile

Jiangsu Gaxiao, one of the professional commercial fan manufacturers is located in Suzhou, Jiangsu province, China. Since its inception, Gaxiao has always been committed to the development and research of industrial high volume fans. . Adhere to the corporate purpose: down to earth, technology-oriented, focus on quality, brand name service!

Nowadays, many physical factories use industrial large fans to promote the air circulation of the production workshop and reduce the temperature of the workshop. This solves the problem of how to choose large industrial fans. Many physical factories will purchase multiple fans in batches and install them in suitable parts of the workshop. . So what do you need to pay attention to when installing a new market quotation for huge industrial fan? #hvls fan #high volume low speed fan #industrial ceiling fan #ceiling industrial fan

First, use the steel bars to firmly fix the fan to the ceiling

The huge industrial fan consists of three main components: the fan blade and the fan head and the suspension device. Unlike ordinary household fans, industrial large fans usually need to be suspended and mounted on the top of the use scene. If the fan is not firmly fixed to the roof, it may cause the fan to fall during the later use. Therefore, it is necessary to fix the work when installing the industrial fan. It should be used on the ceiling of the factory floor. The steel bar hook securely fixes the assembled fan. If there are no reserved bar hooks on the ceiling of the production workshop, the fan should be used to lift the fan on the ceiling.

Second, connect each line accurately

The normal operation of large industrial fans requires the use of power supplies in addition to the support of various important components, and the manufacturers generally reserve the fuses of the live and neutral wires on the suspension of the fan. In the case where the connection between the fan head and the installation scene is inaccurate, a short circuit may occur. Therefore, when installing a large industrial fan, it is necessary to check the connection status of each line. In addition, it is necessary to cut off the installation scene in advance when wiring. Power supply to avoid accidents such as electric shock.

The introduction to the matters needing attention when industrial fan installation is coming to an end. In fact, the installation precautions for industrial large fans are not only the two aspects of suspension and wiring. In addition, the installer should also pay attention to installing the rubber wheel matched with the industrial large fan on the corresponding position on the fan instead of directly discarding it.

Gaxiao is a one of the professional industrial ceiling fan manufacturers in China with our own R&D team, we are always ready to help you increase air circulation and reduce cost.

Company Profile

Jiangsu Gaxiao, one of the professional industrial fan manufacturers, is located in Suzhou, Jiangsu province, China. Since its inception, Gaxiao has always been committed to the development and research of large industrial fans. Adhere to the corporate purpose: down to earth, technology-oriented, focus on quality, brand name service!

Our hvls fan company main products are as follows: Traditional Industrial Fan, PMSM Fan, Commercial Fan, Explosion-Proof Fan and so on. On the basis of energy saving, low carbon and environmental protection, try our best to make the world cool and refreshing.

Weaving machine is a fabric made of spinning parts, which is made of grey cloth or finished cloth by weaving, preparing and finishing. In order to distinguish knitting, it is customary to call weaving machine weaving

The fabric or finished fabric woven by a loom is made of two systems of yarn perpendicular to each other, namely warp and weft, which are woven by a loom according to certain rules. To do a good job of weaving preparation, the yarn through the network、twisting、 warping、sizing and other equipment to make warp (fabric roll axis) and filling package (isattached or cheese). Then  network equipment and the "spinning and twisting machinery" are the same, the rest of the equipment are as follows:

 (1)warping : A certain number of yarns from the package leads, regularly arranged in the beam width on the beam forming rules, forms a uniform layer of warp tension and winding according to the length of a uniform density. The warping machine has a batch warping machine, a warping machine, a yarn warping machine, a ball warping machine and so on.

 (2) sizing machine: to make the yarn surface coated with a uniform film, to increase the yarn strength, wear resistance, reduce the breakage rate, and make weaving smoothly. The size of sizing machine is divided into sizing machine, warp sizing machine, dyeing machine, finishing machine, warping and stretching machine.

 (3) loom: the warp and woof of each of the two vertical systems arranged by each other are woven into fabric or finished cloth by certain rules. There are many kinds of looms, which are mainly divided into two kinds: shuttle looms and non—shuttle looms.

 (4) finishing equipment: to inspect and repair the fabric quality, to improve and enhance the appearance quality of the fabric, and to pack it into a certain form of equipment. The finishing equipment includes cloth inspecting machine, brushing machine, cloth drying machine, cloth folding machine, packing machine and so on.

Cloth inspecting machine: it is used for quality inspection, winding and length measuring of all kinds of fabrics.

Cloth brushing machine: it is used to remove cloth, impurities and cotton knot, and improve the quality of cloth.

Cloth dryer: it is used for moisture regain cloth drying, to prevent mildew in storage.

Folding machine: to fold according to a certain folding, and to measure the total length of fabric based on the folding and folding number.

Packing machine: to make fabric packing into a certain form, which is convenient for transport and dyeing factory sales.

WEAVING MACHINERY

As an integrated supplier of weave machine, we are now providing electronic jacquard machine, high speed rapier looms, low speed rapier looms, jacquard looms, terry towel looms, industrial fabric looms, air jet looms and water jet looms. These weaving looms embody features of Europeans looms, as well as our unique design and technique. Diversified product range, reasonable price and first class quality have enabled us to provide specialized and right solutions for clients with different weaving needs.

Although there are many types of trunnion mounted ball valves produced by trunnion ball valve manufacturers, they all have the following ball valve characteristics:

1. Its operation is labor-saving: the ball is supported by upper and lower bearings, which reduces friction. It eliminates the excessive torque caused by the enormous sealing load formed by the sphere and seal seat driven by the inlet pressure.

2. Reliable sealing performance: PTFE unisexual material seals are embedded in stainless steel seats with springs at the end of the metal seats to ensure sufficient preload of the seals. When the sealing surface of trunnion type ball valve is worn out during use, the valve will continue to ensure good sealing performance under the action of spring.

3. Fire-proof structure: In order to prevent the PTFE sealing ring from burning down due to sudden heat or fire, and to increase the fire potential, a fire-proof sealing ring is set between the sphere and the valve seat. When the sealing ring is burned down, under the action of spring force, the seat sealing ring is quickly pushed onto the sphere to form a metal and metal seal. It has a certain degree of sealing effect. The refractory test meets the requirements of APl6FA and APl607 standards.

4. Automatic pressure relief function: When the medium pressure in the stagnant chamber of the trunnion mounted ball valve constructionincreases abnormally beyond the pre-force of the spring, the seat retreats away from the ball to achieve the effect of automatic pressure relief, and the seat is automatically restored after pressure relief.

5. Drainage pipeline: Both upper and lower parts of the valve body are equipped with discharge L, which can check whether the valve seat leaks or not. In work, when the valve is fully open or closed, the pressure in the middle chamber can be discharged and the filler can be replaced directly. The residue in the middle chamber can be discharged to reduce the medium pollution to the trunnion mounted ball valves.

Zeco Value is one of the most professional trunnion ball valve suppliers. For more information of product features, please visit our website at http://www.zecovalve.com/.

As a industrial Valve factory, ZECO always adhere to exceed customer expectations, to provide customers with more value-added

services and products as the ultimate goal.

ZECO valve group co ltd was established in year 1991. We are located in Shanghai, Yancheng and Wenzhou with total building area 102000㎡. Till now, we have expanded into a group with 8 holding companies(including 5 production bases), sales offices and sales agents. Mainly manufacturing forged ball valve, casting ball valve, wedge gate valve, through conduit gate valve, globe valve, dual plate check valve, swing check valve & forged steel valve.

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Description of 3 inch flanged butterfly valve:

ZECO 3 inch butterfly valve is a small diameter butterfly valve, usually manually operated, and the connection is usually lug type or wafer type, because the advantage of small diameter butterfly valve is that it is simple in accordance with the way, compared with other valve flange connection operation is fast and simple. ZECO as a professional on the wafer and lug type butterfly valve manufacturer, is strict to the material and appearance of the casting, casting usually arrive ZECO factory, will be isolated in the corresponding area waiting for QC inspector inspection, inspector will, in turn, the chemical composition, physical properties of the casting and design is individually and will follow the ERP system into the data of the product review file for later use. ZECO also pays great attention to every detail in the production process, and each process will be tested and recorded by corresponding inspectors in the ERP system.

Features of 3 Inch Butterfly Valve:

1. ZECO 3 inch butterfly valve can use metal seal structure and resilient seal structure, connection mode can also choose lug type, wafer type and flange connection, the choice of diversity, users can choose according to the actual working conditions to meet the requirements of working conditions;
2. ZECO 3 inch butterfly valve has low torque. Although it is small in size, ZECO engineers make every effort to design the product so that users can feel ZECO's improvement in design, rather than rush through it;
3. The stem of ZECO 3 inch butterfly valve is designed with anti blow-out structure, which can ensure the maintenance personnel to avoid personal safety damage caused by the pressure of the middle chamber pushing out the stem when replacing the packing;
4. The seat and sealing ring of ZECO butterfly valve can be replaced, which ensures the quick and convenient maintenance of maintenance personnel on site.

Material of 3 Inch Butterfly Valve:

We have various valve for sale, the mainly butterfly valve price include 3 inch butterfly valve price,  4 inch butterfly valve price. Welcome to buy.

As a industrial valve manufacturer, ZECO always adhere to exceed customer expectations, to provide customers with more value-added

services and products as the ultimate goal.

ZECO valve group co ltd was established in year 1991. We are located in Shanghai, Yancheng and Wenzhou with total building area 102000㎡. Till now, we have expanded into a group with 8 holding companies(including 5 production bases), sales offices and sales agents. Mainly manufacturing forged ball valve, casting ball valve, wedge gate valve, through conduit gate valve, globe valve, dual plate check valve, swing check valve & forged steel valve.

Contrary to the maturity and elegance of satin, the yarn looks youthful, lively and elegant. There are many kinds of yarns, and the classification methods are also different. The general textile industry is classified according to its fiber and textile twisting method. Since we mainly introduce the knowledge of wedding fabrics, we will list the common yarns in wedding fabrics to give you a basic concept. Generally divided into: crystal yarn, organza yarn (European yarn), ice yarn, bicolor yarn, glass yarn, pearl yarn, snow yarn, mesh yarn, georgette yarn (chiffon)

The characteristics of yarn fabrics are versatile. It can be used as the main fabric or as an auxiliary material. The texture is soft and elegant, which can show the romantic and hazy beauty. There have great black sequin fabric and mermaid sequin fabric for you choice.

Suitable styles: cascading styles for rendering atmosphere, princess-style court styles. It can also be used on the long tail of the wedding dress alone. If it is a tight-fitting style, it can be covered on the main fabric as a simple veil.

Comparison of three common dress material characteristics

Eugen yarn, English name: Organza. Eugen yarn is light and elegant, very thin and transparent, feels a little stiff, and is suitable for materials with poncho contours. The price of imported Eugen yarns is relatively higher, mostly for higher grade wedding dresses or foreign trade wedding dresses.

Transparent or translucent light yarn, mostly covered on satin or silk. The wedding dresses designed by the French mostly use Eugen yarn as the main raw material. The composition of Eugen yarn is 100% pol, 100% nalon, polyester and nylon, polyester and rayon, nylon and rayon, etc.

Chiffon (georgette) fabric is light and elegant. It has the flexibility and thinness of silk. It is soft to the touch and looks refreshing and cool. Chiffon dress is very suitable for summer wear.

The crystal yarn has a hard texture, good transparency, light weight and thinness.

Compared with the satin, chiffon, taffeta, etc. of wedding fabrics, the information of crystal yarn is much less. We have also seen many netizens searching for "crystal yarn" in Google, but what they found may be just some supply and demand information of crystal yarn. There is very little information about crystal yarn on the Internet. The main reason is that crystal yarn is different from taffeta and other fabrics.

So, what is crystal yarn? With our years of experience in the wedding dress industry, we now summarize the characteristics of crystal yarn.

The English name is crystal yarn.

The crystal yarn has a hard texture, good transparency, light weight and thinness.

Crystal yarn is often used in the design of wedding dresses in spring, summer and autumn because of its good breathability.

You can judge according to the word "crystal yarn" itself: what is crystal yarn.

Simple comparison of other common wedding dresses material characteristics:

Pearl gauze: shiny, colorful, soft and elegant, suitable for lively, petite, princess brides.

Taffeta: It is light and slippery. It is easy to print dark patterns such as water or wood grain on the fabric, suitable for summer and autumn.

Product - red taffeta dress.

Snow yarn: It feels delicate and silky, and its light transmission is not high. It is mostly used to dye bright colors to make exotic dresses.

Ice yarn: The mesh is thick and dense, the reflection is uniform, the hardness is moderate, and it is mostly used as a cover yarn to cover the main fabric.

Turban yarn: Also called mesh yarn, as the name implies, it is generally the main material for the head yarn. Want to know more couture, please contact us.

1. Achromatic doublet lensis a kind of common lens. It consists of several groups of positive and negative cemented lenses with different radius of curved surface. It can only correct the axial chromatic aberration of red and blue light in spectral line. At the same time, the spherical aberration on the axis and the coma aberration on the paraxial point are corrected. This kind of lens can not eliminate the second-order spectrum, only the spherical aberration and chromatic aberration in the yellow and green wave regions are corrected. The spherical aberration and chromatic aberration of the remaining chromatic aberration and other wave areas can not be eliminated, and the image field bending is still very large, that is to say, only the clear image in the middle of the field of view can be obtained. It is advisable to use yellow-green light as illumination source or insert yellow-green filter in the optical path. This kind of lens is simple, economical and practical. It is often used in conjunction with correction eyepiece and is widely used in medium and low power microscopes. In black-and-white photography, green filters can be used to reduce the residual axial chromatic aberration and obtain good contrast photographs.

2. Complex achromatic doublet lensis composed of several groups of advanced lenses made of special optical glass and fluorite. The axial chromatic aberration is corrected by red, blue and yellow light, and the secondary spectrum is eliminated. Therefore, the image quality is good, but it is difficult to process and calibrate many lenses. The correction of chromatic aberration is in all wavebands of visible light. If blue or yellow filters are added, the effect will be better. It is the best objective in the microscope. It has good correction for spherical aberration and chromatic aberration. It is suitable for high magnification. However, it still needs to be used with compensating eyepiece to eliminate residual chromatic aberration.

3. Planar achromatic doubletlens is a complex optical structure composed of multiple lenses, which can correcting astigmatism and image field bending well, and make the whole field of view clear. It is suitable for microphotography. The correction of spherical aberration and chromatic aberration of the objective is still limited to the yellow-green wave region, and there is still residual chromatic aberration.

4. Planar achromatic doublet lens has the same degree of aberration correction as complex achromatic objective lens except for further image field bending correction, which makes the image clear and flat. But the structure is complex and difficult to manufacture.

Hyperion Optics is a premium supplier of photonics products including optical components, lens systems, and opto-mechanical assemblies from UV, VIS, NIR, to SWIR applications.

Our client base spans across defense, security, bioengineering, pharmaceutical, institutional, industrial, and research industries worldwide. We specialize in DFM (optical assembly manufacturing) input from rapid prototyping to volume production. Our comprehensive metrology coupled with cost-effective philosophy can help Hyperion customers obtain a competitive edge in the global market.

1、Technical principle

The curvature radius of the aspheric lens changes with the center axis. It can be used to improve optical quality, reduce the number of optical components and reduce design costs. Compared with spherical lens, aspheric lens has unique advantages, so it has been widely used in optical instrument, image and photoelectron industry, such as digital camera, CD player and high end micro instrument.

2、Comparative advantage

a, Spherical aberration calibration

The most remarkable advantage of aspheric lenses in replacing spherical lenses is that they can correct the spherical aberration caused by spherical lenses in collimating and focusing systems. By adjusting the surface constant and the aspheric coefficient, the aspheric lens can eliminate spherical aberration to the maximum extent.Aspheric lenses (rays converge to the same point and provides optical quality) basically eliminate spherical aberrations produced by spherical lenses (rays converge to different points and leads to blurred imaging).

Three spherical lenses are used to increase the effective focal length, which can be used to eliminate spherical aberration. However, a aspheric lens (high numerical aperture, short focal length) can be realized, and it can simplify the system design and provide the light transmittance.

b, System advantages

The aspheric lens simplifies the elements involved in optical engineers to improve the optical quality and improves the stability of the system.For example, in zoom systems, 10 or more lenses are normally used (additional: high mechanical tolerances, additional assembly procedures, and the improvement of antireflection coating). However, one or two aspheric lenses can achieve similar or better optical qualities. This reduces the system size, increases the cost rate and reduces the overall cost of the system.

3、Moulding techniques

a, Moulding of precision glass

The molding of precision glass is to make the glass material heated to high temperature and become plastic, and then molded by aspheric mold, and finally gradually cooled to room temperature.At present, the molding of precision glass is not suitable for aspheric lens with diameter greater than 10mm. However, new tools, optical glass and metrology process are driving the development of the technology. Although precision glass molding at the beginning of the hyp design has high cost (high precision mold development), but after the molding, the production of high-quality products can be split off the pre development costs. It is especially suitable for the needs of mass production.

b, Forming of precision polishing

Lapping and polishing are generally applicable to the production of monolithic aspheric lenses at one time. With the improvement of technology, the accuracy is higher and higher.The most remarkable thing is that precise polishing is controlled by computers and automatically adjusted to optimize parameters.If higher quality polishing is required, magnetorheological finishing (magneto-rheological finishing) will be adopted. Compared with standard polishing, magnetorheological finishing has higher performance and shorter time.Precision polishing molding technology need professional equipment. It is currently the first choice of sample production and small batch sample.

c, Hybrid molding technology

The hybrid molding is a spherical aspheric lens with a spherical lens as the substrate, which is cast on the surface of the spherical lens through an aspherical mould and cured by a layer of high polymer with UV light.Mixed forming is generally used the achromatic spherical lens as the base, and then a layer of aspheric surface is cast on the surface to eliminate chromatic aberration and spherical aberration simultaneously.Figure 7 is the manufacturing process of the hybrid aspheric lens. The hybrid aspherical lens is suitable for large scale manufacturing with additional characteristics (eliminating chromatic aberration and spherical aberration) .

d, Injection molding

In addition to glass aspherical lenses, there are plastic aspheric lenses.Plastic molding is the injection of molten plastics into aspherical molds.Compared with glass, the thermal stability and compressive resistance of plastics are poor. It requires special treatment to obtain similar aspherical lenses. However, the plastic aspheric lens is characterized by its low cost, light weight and easy molding. It is widely used in the fields of moderate optical quality, insensitive to thermal stability and little pressure resistance.

4、Basis of choice

All kinds of aspheric lenses have their own relative advantages. Therefore, it is very important to choose the right products for different applications. The main considerations include: batch, quality and cost.

Hyperion Optics is a premium supplier of photonics products including optical components, lens systems, and opto-mechanical assemblies from UV, VIS, NIR, to SWIR applications.

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.

申请文理学院

学生：Y同学

GPA：3.6+

SAT：1260

TOEFL：98

录取学校：联合学院（Union College）

联合学院

众所周知，本科 申请文理学院 奖学金的条件是十分苛刻的。如果不是托福105+，SAT1500+，奖学金想都不要想，更何况是全美排名36，联合学院（Union College）的奖学金?

联合学院是一所著名的私立文理学院，历史悠久，始建于1795年，是美国纽约政府第一家承认的学院。联合学院坐落于美国纽约州斯克内克塔，往东三小时到达波士顿，往南三小时到达纽约，靠近纽约市、蒙特利尔、波士顿等现代化大都市，这为毕业生就业提供了很大便利。学校的著名校友有第二十一任美国总统Chester A. Arthur、激光发明者Gordon Gould，到华纳兄弟娱乐公司CEO Alan Hom，众多校友在政治、科学技术、经济和文化领域都是行业的领军人物。

求真案例

求真教育的Y同学，除了拿到了竞争激烈、学术严谨、历史悠久的文理学院录取，还收获了东北大学（Northeastern University）、普渡大学（Purdue University, West Lafayette）的录取。这么多优秀的大学为什么要争抢一个GPA 3.6（英语成绩C）、托福98、SAT1260，没有任何成绩优势的国际生呢?

Y同学是一个非常内向不爱说话的孩子，求真教育的老师和他第一次电话沟通的时候，感觉他特别着急挂电话，只要老师不说话，他是绝不会主动去开启话题的。和这样的同学接触，老师首先要了解学生的基本情况，第一步就是让他写东西，把自己的基本情况、期望目标、过往经历都通过文字表达出来。第二步是聊天，虽然在书面反馈中只有三言两语的介绍，但是老师从中提取了很多重要信息，并通过和孩子以及妈妈分开沟通进行深入挖掘并做背景提升形成了最终的文书。

Y同学当时就读于一所国际高中，其中的学生来自不同的国家，于是求真教育的申请老师建议他在目前的国际学校建立一个文化社团 ，用自己的亲身经历去帮助身边的人更好的适应新的环境。后来因为时间关系和资金问题，这个社团最终没有开展起来，但是他并没有放弃，从身边的小范围入手，发现身边遇到困难的学生，举办一些文化介绍活动或者校园聚会帮助学生适应，孩子想去美国之后办理这样一个社团，帮助更多的学生。有时候做活动不一定要成功，主要是从这个活动中体现的学生的特质、想法，这才是最重要的。

求真寄语

每个学生都有自己的闪光点，作为顾问老师就是要帮助学生看到这个闪光点，并通过活动背景提升去放大这个优势，然后去展现给招生官看。在这个过程中，学生收获的不仅仅是offer，还有个人成长，Y同学在其中的收获和转变是令所有人欣慰的。求真教育在申请文理学院方面有着多年的经验和丰富的案例，能为学生的前途保驾护航。文章来源：https://indeededu.com

商业分析专业

商业分析专业是美国近年来大热的研究生申请方向，今天我们来看一个求真教育录取的真实案例。

L同学的母亲在孩子大一的时候就来求真教育咨询过出国留学的事宜，但是孩子这边的意愿一直不是很强烈，对继续读研究生的想法也没有很在意。在大二结束的时候，L同学的学校有一个美国加州州立大学交换两年的机会，抱着出国去见见世面的想法，她参加了这个交换项目。

在从美国交换了一学期后，L同学跟她母亲再一次联系了求真教育，确定要出国读研究生。她在美国交换期间，对于美国新颖的教育模式，有趣的课堂设计和更为开放的校园环境都产生了很大的热情，也因此在交换期间的成绩比在国内好很多，她个人也更适应这种教学方式。同时，她的母亲在亚马逊工作，受到母亲的影响，她对于电商和数据分析方面的工作非常感兴趣。

专业选择

在确定了出国的想法后，综合考虑了学生感兴趣的方向，求真教育的研究生申请老师建议她主要考虑商业分析专业，一来是因为专业对口，学习供应链管理的学生申请商业分析是没有问题的。二来是因为商业分析主要涉及三方面的内容，金融、统计、计算机，这三个方向L同学都非常感兴趣。此外商业分析专业作为一个新型专业，就业前景非常好，并且很多学校的商业分析是STEM专业，这一点也能够满足L同学毕业后留在美国找工作的想法。

考试准备

在确定好申请方向后，了解到L同学在美国会拿到本科学位，由此很多学校可以免掉托福。为了确保她能顺利考出GRE成绩，求真教育给L同学做了详细的时间规划，第一个任务就是在大三暑假前考出理想的GRE成绩。在此之前她已经考过两次GRE考试，但是成绩都不理想，刚刚到300分的样子。申请老师给她订的目标是第三次考到315，写作考到3分。如果有时间考第四次，再争取考到320。在第三次考完后，L同学的成绩也只有310分，写作只有2.5分。拿到成绩后，L同学非常气馁，一度想放弃考试。申请老师在和她再三强调了GRE考试的重要性，商业分析专业前100美国总共就有30多所学校开设，GRE写作基本都是卡3分，这个成绩可选的学校太少了，鼓励L同学再考一次。终于功夫不负有心人，L同学最后一次的成绩是318，并且写作考到了3分。

文书写作

在文书环节，每一篇essay文书老师都和学生反复沟通和修改，争取在有限的字数中尽可能地展现L同学的优势。在后续的面试中，求真教育的老师对学生进行了全面的面试指导，最终学生获得了加州大学欧文分校的青睐。

文章来源：https://indeededu.com

商业分析专业

商业分析专业是美国近年来大热的研究生申请方向，今天我们来看一个求真教育录取的真实案例。

L同学的母亲在孩子大一的时候就来求真教育咨询过出国留学的事宜，但是孩子这边的意愿一直不是很强烈，对继续读研究生的想法也没有很在意。在大二结束的时候，L同学的学校有一个美国加州州立大学交换两年的机会，抱着出国去见见世面的想法，她参加了这个交换项目。

在从美国交换了一学期后，L同学跟她母亲再一次联系了求真教育，确定要出国读研究生。她在美国交换期间，对于美国新颖的教育模式，有趣的课堂设计和更为开放的校园环境都产生了很大的热情，也因此在交换期间的成绩比在国内好很多，她个人也更适应这种教学方式。同时，她的母亲在亚马逊工作，受到母亲的影响，她对于电商和数据分析方面的工作非常感兴趣。

专业选择

在确定了出国的想法后，综合考虑了学生感兴趣的方向，求真教育的研究生申请老师建议她主要考虑商业分析专业，一来是因为专业对口，学习供应链管理的学生申请商业分析是没有问题的。二来是因为商业分析主要涉及三方面的内容，金融、统计、计算机，这三个方向L同学都非常感兴趣。此外商业分析专业作为一个新型专业，就业前景非常好，并且很多学校的商业分析是STEM专业，这一点也能够满足L同学毕业后留在美国找工作的想法。

考试准备

在确定好申请方向后，了解到L同学在美国会拿到本科学位，由此很多学校可以免掉托福。为了确保她能顺利考出GRE成绩，求真教育给L同学做了详细的时间规划，第一个任务就是在大三暑假前考出理想的GRE成绩。在此之前她已经考过两次GRE考试，但是成绩都不理想，刚刚到300分的样子。申请老师给她订的目标是第三次考到315，写作考到3分。如果有时间考第四次，再争取考到320。在第三次考完后，L同学的成绩也只有310分，写作只有2.5分。拿到成绩后，L同学非常气馁，一度想放弃考试。申请老师在和她再三强调了GRE考试的重要性，商业分析专业前100美国总共就有30多所学校开设，GRE写作基本都是卡3分，这个成绩可选的学校太少了，鼓励L同学再考一次。终于功夫不负有心人，L同学最后一次的成绩是318，并且写作考到了3分。

文书写作

在文书环节，每一篇essay文书老师都和学生反复沟通和修改，争取在有限的字数中尽可能地展现L同学的优势。在后续的面试中，求真教育的老师对学生进行了全面的面试指导，最终学生获得了加州大学欧文分校的青睐。

文章来源：https://indeededu.com

Generally speaking, traveling by the rail transit system is one of the most efficient ways to get around, especially in regions with high population density. This way, pedestrian turnstiles are needed to improve the passenger experience.

ZOJE Intelligent offers a wide variety of pedestrian turnstiles for train stations with specific requirements as customization is what we are good at.

Benefits of Using Train Turnstile

1. Control the flow of people during rush hours to prevent crowding or trampling.
2. Unregistered passengers will be kept from entering the restricted areas.
3. Turnstile gates will be more efficient than manual checking. Also, it'll be more reliable.
4. Public transportation stations are usually in service for 24/7. With train turnstilegates installed, a lot of labor costs would be saved as fewer ticket inspectors are needed.

Public Transportation Turnstile Solution

All Problems Solved

The railway, bus or metro station turnstile gates are always facing some problems, such as more frequent use, easy failure, slow running speed, etc, which greatly reduces the efficiency of the passage, causing great inconvenience to daily management and use. All these are not a problem for ZOJE.

For passengers with large luggage, baby carriages, wheelchair, etc, train turnstile and ticket turnstile with customized wider lanes could be provided.

Public Transportation Turnstile Solution

Features of ZOJE Train Turnstile Gates

1. Compatible with paper ticket, QR code, RFID card, face recognition and so on.
2. High-quality and stable brushless or servo motor for high frequent and long-term use.
3. PWD(Persons with Disability) lanes are available for the benefits and privileges of people with disabilities.
4. More pairs of infrared sensors are as optional choice for the sake of children and seniors' safety in case of any pinching injuries.
5. It will put an end to any kind of sneaking without tickets. One person, one ticket, with tailing alarm.

ZOJE will offer you the most qualified train station solution for your most benefits. Feel free to contact us for more.

Based in Shenzhen, the innovation center of China, Hong Kong ZOJE Intelligent Technology Co., Ltd was established in 2012. We are access control security turnstile gate suppliers, specializing in turnstile gates technology and security control systems ever since the very beginning.

HanKing Mould, a Chinese mould maker located in Shenzhen, dedicates in injection moulding and tooling, manufacturing and plastic injection moulding services, offers custom injection mould making and plastic parts production for global companies.

As the famous plastic molding shop, we have injection mould for sale, welcome to buy injection mould.

HanKing Mould Enginering Ltd. started the business in the year of 1996 as a injection mold maker company in the line of mold making and injection molding in Longgang, Shenzhen, China. With continuous developments and progresses, we have become a professional Chinese plastic injection tooling company, offering custom plastic injection molding service, plastic molding manufacturing and other mould making services.

Following the concept of customer first, HanKing Mould dedicates to be a trustworthy tooling company by designing and manufacturing plastic injection molds, providing custom plastic injection molding china manufacturing and services according to every individual's requirements. Hanking's successes are ensured by our management capability, technical knowledge, advanced plastic tooling equipment and professional injection molding services. We are pursuing better quality and technical capability to meet the demands of increasing mold making markets.

Optical communication is a communication method in which light waves are used as information carriers and optical fibers are used as transmission media. After decades of development, the optical communication industry has expanded its industry scale and product range. At present, there are already nearly complete industrial chains such as optical transmission equipment, optical access equipment, optical supporting equipment, optical fiber cables, and fiber optical components. fiber optic cables for data communication, and optical communication equipment includes optical terminal transceivers, switches, and other related products. In recent years, the average growth rate of the overall optical communication industry has reached 30%-40%.

5G is the future development trend of the communication industry, and the optical communication industry plays a vital role in the construction of 5G networks. The products involved in the application of optical communication mainly include fiber optic cable and optical communication equipment and devices, including fiber optical cable, fiber indoor cable, fiber optic patch panel, fiber optic patch cords, and other related products. The demand for fiber optic cable driven by 5G will begin to manifest in 2019,and the traffic will increase further after 5G commercial use in 2020 which will bring the increasing pressure of network upgrade and expansion. As a result, the demand for fiber optic cable will continue to drive for a long time.

UnitekFiber is a provider of device and network solutions for information and communication. After years of development, its product range covers the series of fiber optic indoor/outdoor cables, Fiber optical patch panels, MPO/MTP trunck cable, PLC splitters and fiber assemblies ect. The company policy of UnitekFiber is always providing professional and high-quality services. We sincerely look forward to co-operating with you.

UnitekFiber Solution is a group company which engaged in R&D, manufacturing and marketing of fiber optical products and accessories.Providing professional products and services of fiber Indoor/outdoor cables, Fiber cable management, high density datacom cabling, Fiber optical connectivity and PLC splitter and so on .Our products and solutions are widely applied in 4G/5G, Data Center and Cloud Computing industry etc.

With more than 10 years experience and development, UnitekFiber Solution become the industry-leading fiber optics supplier which supported the main domestic market in the South and a big occupation in overseas market.Our key value is offering the best quality and service to the customers around the world.

Use and classification of corner shearing machine  . The shearing machine is mainly used in cutting the straight edge of various sizes of sheet metal and is widely used in cars, planes, steel rolling, tractors, ships, Bridges, electric appliance, instrumentation, boiler, pressure vessel and other industries.

There are many kinds of shearing machine. According to shearing machine function, shearing machine working principle and structure, they can be divided into:

First, the Flat blade shearing machine.

It features superior quality, small deformation but large energy consumption. And the two blades are parallel to each other. It is often used in the hot shearing of the Square bloom and the slab in plants.

Second, inclined blade shearing machine.

The upper and lower blade of the shearing machine form an Angle, and the upper blade inclines 1 ° ~ 6 °. The shearing force of the inclined blade shears is smaller than that of the flat blade shearing machine, so the power of the motor and the weight of the whole machine is smaller. It is commonly seen in the practical application. This kind of shearing machine is divided into guillotine shearing machine and pendulum sheet shearing machine according to the motion of the tool holder. And according to the main drive system, it can be divided into two types: mechanical transmission and hydraulic transmission shearing machine.

Third, Multi-purpose shearing machine:

The sheet bending and shearing machine can complete the cutting and bending process on the same machine, which is convenient and practical. Combined punching and shearing machine can be used for cutting of sheets and proximate matter, most of which occur in the laying-off process.

Forth, Special shearing machine:

Sheet flat line shearing machine is used in sheet coil straightening lines. The high-speed shearing machine is designed to cooperate with fast shear requirements. On the thick sheet shearing line, there is mostly hydraulic high-speed shearing machine. While on the thin sheet line, there is mostly pneumatic guillotine shearing machine. And on the high-speed line, there is flying shear, which can work continuously and brings high production efficiency. Steel structure production line shears are mostly used in Angle steel and H section automatic production line to complete the cutting process. Cold bending molding line shears, such as the cold bending line of automobile longitudinal beam, the production line of the side baffle of the car, the molding line of color steel sheet and other special shearing machines.

If you want to know the types of shearing machine, please contact us. We will give you book of shearing machine safety precautions.

BLKMA is a company from China. Founded in 1994, it is located in Ma'anshan, Anhui Province, China. It is only 26 kilometers away from Nanjing Lukou International Airport. It has the developed transportation system so that our customers can visit at any time. In the pipeline processing machinery industry in China, BLKMA is the most authoritative modern enterprise, which participated in the national Chinese pipeline machinery industry standards. In recent years, it maintains a rapid growth in sales revenue and enterprise scale according to the technological innovation and the continuous development of global markets.

BLKMA Auto duct line And Spiral duct machine delievery to Australia

The order of Duct marking machine from an Australian customer was completed and shipped to Brisbane, Australia, after rigorous factory testing.

The Zhiyun Crane 3S is the latest iteration of Zhiyun’s flagship line of Crane gimbals, traditionally designed for DSLRs and mirrorless cameras. On first glance, the Crane 3S looks a lot like the Crane 3 LAB, but it definitely holds a few extra tricks up its sleeve.

I’ve been using one for a few weeks now when weather and Scotland’s lockdown rules have allowed and I’m going to go over some of those differences and the advantages the Crane 3S has to offer over the Crane 3 LAB.

There are three different Crane 3S kits available. There is the Crane 3S-E, the Crane 3S and the Crane 3S Pro. We’ll get into the differences a little later, but for clarification, the kit I have is the standard Crane 3S.

FIRST IMPRESSIONS & DIFFERENCES OVER THE CRANE 3 LAB

The case for the Crane 3S is quite similar to that of the Crane 3 LAB. It feels a little more compact, although it’s actually pretty close in size. It feels tough and rugged, built from the same kind of hard foam as many gimbal cases these days. It has a top handle for carrying it and locking clips that keep it shut when it needs to be.

Inside though, the Crane 3S case looks a little more cramped than that of the Crane 3 LAB due to a slightly beefier body, with no empty slots for future expansion and upgrades, which is a little disappointing. This was a great feature of the Crane 3 LAB case, which had dedicated slots for all the extras you could buy separately as well as a spare set of batteries. There is still nowhere to add any kind of shoulder strap. So, if you’re carrying the case, you’re tying up one of your hands.

If you buy the 3S Pro kit, I would assume (hope?) that it comes with a different case containing slots for all the extra bits that come with it. But if you’re buying the 3S and hoping to add extras like the focus motor (which only come with the 3S Pro kit), then you’re going to need something else to store them in.

All that said, the case feels solid and everything is packed well inside. The immediate difference between the 3S and the 3 LAB, for the observant ones amongst you, is that the handle isn’t actually attached to the gimbal. Yes, that’s right, it’s removable, and the gimbal can function just fine without it through a bunch of extra buttons on the gimbal body itself or by using the mobile app.

You can see when you look inside the Crane 3S and Crane 3 LAB cases side by side that the 3S is somewhat beefier than the 3 LAB, with noticeably thicker arms and larger motors. This provides the Crane 3S load capacity of a whopping 6.5kg vs the 4.5kg of the Crane 3 LAB. Interestingly, both gimbals have the same minimum load capacity of a somewhat modest 0.6kg. The gimbal itself, however, weighs almost a kilogram more than the 3 LAB, coming in at 3.2kg vs 2.3kg – which is a significant difference.

Pulling it out of the case, the 3S actually feels even more solid than the 3 LAB did. I think this is partly due to the new locking mechanism on the pitch, roll and yaw axes. In the 3 LAB, the arms could either be unlocked and free to move or “locked”, restraining them to a fairly consistent position, although a little movement was available. With the Crane 3S, these locks now have three modes. There’s unlocked, a locked mode similar to the 3 LAB and a new really locked mode, which tightens the arms down hard so that they don’t move at all – which makes balancing a little easier.

One of the things I immediately noticed about the 3S over the 3 LAB was how many connection points it has. But it wasn’t just the quantity that caught my attention, but the fact that some of them have been upgraded from 1/4-20″ to 3/8-16″. This is great because it means you’ll get a more substantial connection between accessories and support systems, but it is slightly annoying in other ways as some accessories will not be interchangeable between gimbals if you own both the Crane 3S and Crane 3LAB, or other gimbals that only utilise 1/4-20″ threads.

The new mounting plate was also something that I noticed right away. It’s still a Manfrotto PL compatible plate, although they’ve ditched the strange extra adjustable platform of the mounting plate that came with the 3 LAB and they’ve also added threads on the front of the plate to attach rods for your follow focus motors. Having this built right into the tripod plate means it’s much easier to set up your camera and balance it properly with a follow focus unit now than it was before because the camera and focus motor is moving together.

You’ll see above that there’s also a lens support supplied with the mounting plate. Personally, I’ve only needed to use this when playing around with the 300mm, but it can be very handy for larger cameras with big lenses that need a little extra assistance. To help with the increased size of the loads it can carry, the whole mount assembly slides left and right from the tilt arm, too, which means you no longer need offset plates for wide cameras like the Blackmagic Pocket 4K.

As a quick aside, while we’re on the topic of focus motors, the Crane 3S is compatible with the Crane 3 LAB focus motors, and there are Type-C USB sockets for connecting both right next to the mounting plate. So, if you’re upgrading from the 3 LAB to the 3S, bear this in mind.

After charging up the batteries and pulling everything out of the case, things went together well. The SmartSling removable handle, which replaces the fixed handle on the Crane 3 LAB goes in and out easily and utilises a double locking system to ensure a good fit with no accidents.

The camera slides onto the mount smoothly and balancing the camera is just as straightforward as it was on the 3 LAB if not a little easier, thanks to being able to completely lock each arm down tight.

Powering it up presents the same array of shooting modes as the Crane 3 LAB and handling seems very similar, albeit slightly heavier.

Let’s dig into a little more detail now, though.

THE SMARTSLING (AND EASYSLING) HANDLES

The kit that I have is the standard Zhiyun Crane 3S package. This includes the SmartSling handle, which offers similar controls to the built-in handle on the Crane 3 LAB except that unlike that one, this is removable.

A removable handle might seem a little odd at first, especially if you’re only used to using gimbals handheld, but it has a few benefits. First, it means you can break the gimbal down into smaller components for more easily packing into a backpack. But it also means that you have easier mounting options for attaching it to things like vehicles, as the arm isn’t going to be getting in the way, and helps to keep everything as compact as possible.

Attaching the Crane 3S to a vehicle isn’t something I’ve tried yet, although it’s on my list. After Scotland’s lockdown is fully over and it’s safe to travel and be in close proximity to other people, it’s one of the first things I’ll be trying when the chance presents itself, so stay tuned for that.

The Crane 3S-E package comes with just the EasySling handle, which is essentially just a rubber-clad metal cylinder with a 3/8-16″ threaded socket in the bottom, a 3/8-16″ threaded screw on the top. It’s clad in rubber to make it easy to grip and not feel so cold when you’re shooting in chilly weather. You can screw this straight into the gimbal, or attach it via a small offset plate, putting it into a similar position to how the SmartSling would mount. Of course, you don’t get any handle controls or display with the EasySling handle.

Despite not being part of the standard 3S kit, I did receive the EasySling handle, and if you decide to only get the standard kit, I’d definitely recommend buying an EasySling handle separately. It’s available as an optional accessory. Both handles come included with the Crane 3S Pro kit, and having them both will make your life much easier with the Crane 3S, especially if you’re using larger cameras, as you can also mount it underneath the gimbal with the supplied tabletop tripod below that.

Being able to use both the SmartSling and EasySling handles simultaneously in this way and pick the whole rig up and set it back down with two hands definitely makes life easier on your arms and back.

I was originally going to recommend that the EasySling handle would be a good upgrade for existing Crane 3 LAB owners who don’t need the added load capacity and versatility of the Crane 3S, but there’s a bit of a snag. The Crane 3 LAB and its accompanying tabletop tripod use 1/4-20″ threads, not 3/8-16″. Hopefully, Zhiyun will release a similar handle that uses 1/4-20″ for Crane 3 LAB users, as Zhiyun has stressed that the 3S is not a replacement model for the 3 LAB, it’s simply another product line.

The mount on the Crane 3S (left) is 3/8-16″, a beefy upgrade from the 1/4-20″ on the Crane 3 LAB (right), although it means parts aren’t interchangeable.

This also means that all your 1/4-20″ quick releases for the Crane 2 and Crane 3 LAB to take it on and off the mini tripod, your monopod, or whatever else you put it on also won’t fit the Crane 3S. Hopefully, they’ll release a 3/8-16″ version, too. Or at least one with a 3/8-16″ hole in the bottom, a 1/4-20″ thread on top, and a couple of 1/4-20″ to 3/8-16″ adapters.

WEIGHT AND SIZE CAPACITY

While the Zhiyun Crane line of gimbals has traditionally held a lot of weight, they’ve had a one or two issues. Many users haven’t been able to take full advantage of that weight capacity due to size limitations. Usually, it’s because the camera just can’t sit off to the side or forward & backwards enough to balance well or the larger camera systems (like the Blackmagic URSA Mini) physically don’t fit. With the Crane 3S, those problems are solved, with the ability to take some pretty large cinema cameras. Even the Blackmagic URSA Mini.

Knowing in advance that I’d have a Zhiyun Crane 3S was on the way to me, I had hoped to get hold of and actually test it with a Blackmagic URSA Mini but then the lockdown happened, making that pretty much impossible. So, I’ve had to make do with the equipment I have here at my disposal. For me, that primarily means Nikon DSLRs and Panasonic mirrorless. Not the best test subjects for a heavy-duty gimbal like this, but it does allow me to test out at least physically large and awkward setups, even if it’s not putting much of a load strain on the gimbal.

My basic setup for these tests was the Nikon D800 and the Sigma 28-70mm f/2.8 lens. It’s not a particularly outstanding setup when it comes to video quality, but it’s a respectable size and weight and represents what you might get with something like a Pocket 4K or larger video-centric mirrorless camera. So, it serves the purpose.

Initially, I tried it out with just the supplied mini tripod screwed into the bottom. Despite the increased weight, it felt quite similar to using the Crane 3 LAB. The movements were pretty much the same, and the general operation didn’t differ too much despite the extra controls and buttons on the Crane 3S.

The one thing that did stick out, though, was the joystick. You can’t unscrew it and remove it on the Crane 3S like you can with the Crane 3 LAB, which can sometimes lead to accidentally knocking it and moving the orientation of the camera if you’re not careful.

What I really wanted to see, though, was how big and useful this thing was fully extended. The extension is a separate piece, and it’s awesome, but it’s also awkward. It’s not designed to be regularly taken on and taken off. The wires contained within the arm are quite delicate and it is quite easy to risk damaging them if you’re not careful. So, if you’re always using larger camera systems, you’ll want to keep the extension attached all the time. This means you’re probably going to be looking for another case in which to keep the gimbal, as it won’t fit into the supplied one with the extension arm attached.

But, I extended the arm on the head of the gimbal, put the EasySling handle underneath and attached the focus motor. My D800 was otherwise engaged, so I just grabbed a 1.5x crop Nikon D7000 – mostly because this would offer me a field of view at a given focal length similar to Super 35mm. On this camera, I put the Nikon 300mm f/4 AF-S, for a field of view similar to a 450mm lens on full-frame. This is a setup that just should not work on a gimbal, and it’s rare you’ll find people using anything longer than about a 60mm or 70mm full-frame equivalent lens, just because such a long focal length massively magnifies the little micro-jitters from the motors or simply being handheld.

It actually held up surprisingly well. You do need to be quite careful, and tracking a moving subject is extremely difficult because the tiniest movement in pan follow mode can translate into a very big shift going ahead of your subject. But I just wanted to see how well it could even handle such an odd (for shooting video on a gimbal) set up and it was very impressive. It held the shot extremely well. Occasionally I moved a little too quickly and it would be pointing at something completely different to what I intended, but when I wasn’t screwing up, it was certainly giving me usable steady shots, without any of the jitters you’d expect with such an unusual load.

It’s certainly not a practical setup, by any means, and not something I’d ever use in the real world, but it served its testing purpose. If you want to go handheld on a static subject at a distance with such a long lens, then it does sort-of work. Of course, I’d probably recommend a tripod with a fluid head instead for this sort of thing, but curiosity got the better of me and I had to try it.

My loads were typically of the DSLR + 28-70mm f/2.8 variety I mentioned earlier, though and it it performed equally as well as the Crane 3 LAB. Except with the added benefit of being able to put the EasySling handle between the gimbal and the mini tripod, making it much easier to pick it up, set it back down and walk around with it two-handed.

BALANCING AND THE NEW LOCKS ON THE ARMS

As mentioned earlier, the Crane 3S features a 3-way locking system over the 2-way system of the Crane 3 LAB, which had them completely loose or sort-of locked. Now you get loose, sort-of locked and locked solid. This actually makes much more of a difference than I expected it to. For easy transporting in a backpack (which the Crane 3S can do, thanks to the removable handle), being able to fully lock the arms provides a much more secure feeling when it’s bouncing around inside the bag. But it also made balancing easier, too.

Instead of having a locked-ish feeling with the two arms I wasn’t currently balancing, I could lock them down completely. They were absolutely immobilised, which meant that it was much easier to adjust the length of the other arms individually and balance each one in turn without wobbles from the other two. As a result, balancing was easier and possibly a little quicker than it was with the Crane 3 LAB, and when you’ve got a big, unbalanced and unwieldy load on there, it definitely helped.

The locks of the Crane 3 LAB were definitely a step in the right direction from the no-lock-at-all on the Crane 2. The Crane 3S just takes that a step further and it made a big difference to me.

OTHER FEATURES

The Crane 3S comes with the usual assortment, but also has one or two extra tricks up its sleeve. As one would expect, there are places to connect a pair of servo motors to control focus and zoom (or aperture) rings on your lens. These sit directly next to the mounting plate for your camera, so they’re within easy reach. The Crane 3S also works with the same motors as the Crane 3 LAB. So, if you’re upgrading from the 3 LAB to the 3S, you won’t need to buy new motors.

There’s also the port on the other side for connecting the gimbal to your camera, offering some level of remote control for a number of brands and models of camera to different degrees. With some, you can control the focus without a servo motor over the USB connection. With others you can adjust the exposure settings. Some cameras allow you to start and stop recording from a button on the gimbal itself. And some don’t offer you any kind of communication between the camera and gimbal at all.

None of my cameras are compatible with the USB communications on the Crane 3S, but I did use the focus motor from my Crane 3 LAB with it and it behaved flawlessly.

One of the big advantages the Crane 3S has over the Crane 3 LAB is when it comes to power. Yes, both of them are powered internally by a trio of Zhiyun 18650 batteries, but the Crane 3S also allows for external power via the Zhiyun TransMount PowerPlus, which extends the battery life with six more 18650 batteries and plugs into a port on the side of the Crane 3S.

SHOOTING MODES AND HANDLING

As you would expect, the Zhiyun Crane 3S offers the usual array of shooting modes including Pan Follow (PF), Follow (F), Point of View (POF), Vortex (V), Lock (L) and Go. Each of these modes offers different ways of shooting to get different kinds of shots.

Pan Follow (PF) – This mode lets you pan and follow your subject on a horizontal plane, even if you’re tilting the actual gimbal for better handholding.

Follow (F) – This mode pans horizontally as well as tilts up and down to follow your movements.

Point of View (POV) – This offers synchronous 360° movements on all three axes.

Vortex (V) – This offers 360° barrel rotation when the gimbal is “underslung”

Lock (L) – This locks the camera to always point in a specific direction, no matter how you turn or tilt the handle.

Go Mode – This mode lets you capture fast action and movement for things like sports or fancy whip pan transitions

All of these modes performed quite well, although I don’t really need to use the POV or Go modes much for the kinds of things I shoot. Pan Follow, Follow, Vortex and Lock modes work as well as we’ve seen from other gimbals in Zhiyun’s lineup – although Vortex isn’t one I need to use too often.

The controls to switch between modes are available on the SmartSling handle with buttons spread around the LCD and to the side, but you can also switch them on the gimbal itself. This means you have access to change modes with either hand if you need it, or when you’re using the EasySling handle.

After using the Crane 3 LAB for the past year or so, switching to the Crane 3S with the SmartSling handle was a doddle. It operates in a very similar fashion. Using the EasySling handle, though, took a little more getting used to. Not having the controls right there at my fingertips with an easy to read display was a pain. If you’ve never used the 3 LAB or the SmartSling handle, you’d probably take to it more quickly. But for me, that EasySling handle will live underneath the gimbal between it and the mini tripod.

And with that setup, it’s absolutely fantastic. SmartSling handle on the back, EasySling handle underneath (if you go for the standard 3S kit, BUY THE HANDLE!) and it felt easier to handle than the Crane 3 LAB, despite the increased weight. Because I was able to more easily distribute that weight, and because I didn’t struggle as much to lift or set down the gimbal, my arms and wrists survived for much longer.

If you’re using a much heavier system, like the previously mentioned URSA Mini, then you’re not going to have such an easy time. It’s certainly not something you’re going to be carrying around all day without some assistance from something like a Steadicam vest & arm or the Digitalfoto Thanos Pro. But, without the arm & vest, it should still be usable for short bursts.

One of the things I’m particularly looking forward to trying, which I haven’t done yet, is vehicle mounting. It’s something Zhiyun showed off in the launch video, and it’s made easier by the fact that there’s a more substantial 3/8-16″ socket underneath but also a second one on top, allowing for two pretty solid mounting points. And as you can remove the SmartSling handle from the gimbal, it’s not sitting there getting in the way.

When using this setup, obviously you’re not going to be holding it. You’re either going to be communicating via smartphone or Zhiyun’s Image Transmission System. But it’s definitely something I plan to try once the country starts to fully open up and it’s safe to hang out with other people again. And what could be a better view for it than the Scottish wilderness on two wheels?

CONCLUSION

Overall, it’s a really nice upgrade over the Crane 3 LAB if you can deal with the extra weight or really need the increased load capacity. If you already have the Crane 3 LAB and it already offers you exactly what you need, then I’d probably stick with it. If you don’t know whether you need the extra features and load capacity the Crane 3S offers over the Crane 3 LAB you already have, then just stick with what you know. But if you don’t have the Crane 3 LAB yet, and you’ve been thinking about it, it’s definitely worth considering the Crane 3S instead.

PROS

When it comes to the pros, there are quite a few – more than I expected over the Crane 3 LAB.

6.5kg load capacity with stronger motors for big beefy rigs

Extendable arm for increased size capacity for larger camera setups

Same minimum load capacity as the Crane 3 LAB

Lateral movements of the camera plate for wide cameras like the Pocket 4K

External power for longer running time with heavier systems

Removable handle to let it fit in a backpack when travelling

The EasySling Handle as a base between the gimbal and tripod (just get it)

CONS

Weight. In a straight side-by-side with the Crane 3 LAB, assuming you’re using a camera setup that works fine on both, you’re carrying around an extra 900g for no real benefit. When you add the EasySling handle, though, it gets easier and for me, it sort of evened things out.

If you’re using a really heavy rig, then you’re going to need to invest in a vest and arm solution for long term use on set.

If you’re thinking about the Crane 3S-E package which only contains the EasySling handle, then I’d probably suggest going for the Crane 3 LAB instead, if you can find one, unless you’re planning to vehicle mount it or something and control it remotely and really need that extra load capacity. The versatility of the built-in handle on the Crane 3 LAB is well worth the extra, plus you save some weight.

If you’re looking at the standard Crane 3S package, then I’d probably recommend going for this over the Crane 3 LAB if you don’t own one already. If you’re concerned about the extra weight, sure, go for the Crane 3 LAB, but given the benefits of the EasySling handle underneath the gimbal in addition to the SmartSling handle controlling the gimbal, I think I’d still prefer the Crane 3S with buying that extra handle (it’s only an extra $49)

If you’re planning to go the whole hog and get the Crane 3S Pro package, then you likely already know that you need both handles, along with the external power, focus & zoom motors and all the extra bits, so just go for it. But plan for the arm & vest.

With Zhiyun's new gimbal about to launch, should you care? And if so, why?

With modern DSLR and mirrorless bodies being more than capable video cameras, a lot of stills shooters have dipped their toes in to moving image waters. However, there was the barrier that is so familiar to photographers the world over: money. To effectively shoot professional quality footage, there's always equipment you could do with owning, but that racks up in cost. However, typical to all technological advance, things are getting smaller and cheaper.

Zhiyun have already built a good reputation in the gimbal world, and their new Crane M2 looks to be an excellent option with a low entry point — a very low entry point. Coming in at just $269, videographers using mirrorless, small DSLRs, or phone cameras can have a serious gimbal for under $300 without having to take your chances with unproven brands. It is certainly an interesting option.

Do you currently have a gimbal at this price point? Are you looking to buy Zhiyun-Tech's new stabilizer? Share your thoughts in the comments below.