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Impulse refers to the welding current waveform is discontinuous, current size changes.

Generally speaking, pulse type spot welder refers to the sinusoidal alternating current is SCR, divided into sections of current, commonly known as pulse welder. In other words, pulse mode of operation refers to the mode of operating only once every certain interval.

At present, single pulse and double pulse are mostly used in welding.

Conventional pulse gas welding: only one pulse. All the peaks of a monopulse are the same like NNNNN. Pulse gas welding machine is the use of pulse current to achieve droplet transition welding mode, no splash, deep penetration, fine grain, high weld strength, suitable for all-position welding, from 20 a to 500A can achieve stable quality welding, welding performance is far better than the ordinary gas welding machine, is the mainstream direction of welding machine development. Double pulses are equivalent to the superposition of two single pulses with the same period and different phases. In other words, one period may have two peaks: nNnNnN.

Double pulse gas shielded welding is a welding method developed on the basis of pulse gas shielded welding. It is a welding method with alternating changes of two pulse gas shielded welding methods with different current sizes. It is mainly used in the welding of aluminum alloy, and it can produce the effect of fish-scale pattern without swing, similar to the effect of ac TIG welding. In addition, this welding method can effectively control the heat input, which is similar to the pulsed argon arc. It can be fully welded without penetration, and is suitable for all metal welding. It is an advanced welding method.

Application advantages of impulse welding:

There is no spatter in the welding process, the heat affected area is small, especially for the thin plate welding has obvious advantages, the consistency of energy waveform output can be guaranteed from beginning to end, and the fusion depth and weld pile height are fully consistent. Double pulse can be used for welding aluminum alloy and stainless steel. No spatter during welding, easy to operate, suitable for manual and automatic welding, arc stability, adjustable depth, beautiful shape, less porosity, excellent mechanical properties and other characteristics! It is widely used in aluminum alloy, steel ship, locomotive, automobile parts, automobile manufacturing, aerospace, colleges and research institutions, heavy industry machinery, pipe making, steel structure, coal mining machinery, etc.

If you want to buy high frequency plastic welding machine and impulse welding machine, I think we are a good choice.

At present, pvc membrane welding machine has been widely promoted in a number of plastic welding industry. Various welding defects are inevitable in the process of use. In this article, it mainly analyzes how to solve the problems in debugging or welding.

1.Crush and bruise

Pressing injury and abrasion are common problems in the process of pvc membrane welding machine. Sometimes it's not so serious, and it just gets white or marks. When you encounter such problems, the first thing to do is to ensure that the location of the tooling is not out of alignment. First let off the air of the cylinder, press down the welding head, and carefully observe whether the welding head position of the scratch is correct. If the welding head is in the correct position, or if the abrasion or compression occurs on the support (or lower cover), then it is necessary to observe whether there is any interference between the tooling and the product. If it is old tooling, it is suggested to clean the tooling with alcohol at this time. If it is a new fixture, lightly rub the scratch (especially at the bottom of the step) with sandpaper to prevent burrs. In addition, observe whether the air pressure of the cylinder is too large during welding, whether the film of the pad has not been changed for a long time during welding, or whether there are foreign bodies stuck on the film.

If the above work is done, the pressing injury still exists, it can be basically judged as the interference of tooling. At this time, the mold shall be modified according to the size and location of the pressing injury:

(1)slight pressing injury. File the sharp Angle of the tool at the corresponding place of the tool, blunt the sharp Angle of the tool, and then use sandpaper polishing;

(2)the pressing injury is serious, but there is no welding rib at the corresponding place. Rub off the interference part of the fixture with an air abrasive rod (be careful not to touch other parts, especially the root part of the air abrasive rod, which may be rubbed off other places without being noticed). After grinding, make it smooth with whetstone and buff with sandpaper;

(3)severe crush injury. If there is welding rib in the corresponding place, or if there is serious pressing injury and the interference part is very large, please consult with the designer. Have the processing center dealing with the modified drawing and contact the relevant personnel to confirm whether there is a problem with the injection molding, or whether to improve the product structure.

2.Material overflow

If there is any overflow in the welding process of pvc membrane welding machine, do not debug or modify the welding parameters right away. First measure the size after welding, and compare it with the normal value. Adjust according to the difference.

3.Insufficient welding strength

If it is old tooling, first stick the product on the welding head, observe whether the gap between the product and the welding head is too large in the weak welding place, to determine whether the welding head is worn; if it is a new tool, please scan it with the welding head, observe its frequency, power and curve, and make sure there is no problem with the welding head.

We are one of the professional rf welding supplies, we produce pvc membrane machine, warmly waiting for your order!

1.Overview of EV Water-Cooling On-board Charger Case

Vehicle charger is an essential core component of new energy vehicles, and its market scale expands with the rapid growth of the new energy vehicle market. Compared with traditional vehicles, new energy vehicles have three core components, namely: "battery" assembly means battery and battery management system; "Motor" assembly means the motor and the motor controller.

At present, the vehicle charger has the function of high-speed CAN network and BMS communication to judge whether the battery connection status is correct. Getting the battery system parameters, and the real-time data of the whole group and the single battery before charging and during charging.

By high speed CAN communication network and vehicle monitoring system, upload the working status, working parameters and fault warning information of the charger, and accept the control command to start charging or stop charging. For safety protection measures, it has functions such as ac input over-voltage protection, ac input under-voltage warning and ac input over-current protection.

2.Advantage of EV Water-Cooling On-board Charger Case

Aluminum alloy structural parts have good plasticity, aluminum alloy material special physical properties,so in the ductility and plasticity of the product is much better than the steel material. Aluminum alloy structure has advantages of light weight, small volume, low cost, but also has the waterproof, dustproof and anti-corrosion,the characteristics of aluminum alloy on the heat dissipation can be fast cooling, and the structure can make air cooling and water cooling model charger, effective cooling of high power charger, enable the internal electronic components to small power input, the effect of high power output.

3.Application of EV Water-Cooling On-board Charger Case

1. AC outdoor ev charger cover

2. EVcharger enclosure

Friction welding is a pressure welding method that uses the heat generated by the relative frictional movement of the weldment to achieve reliable connection of materials.

The friction stir welding and processing is under the effect of pressure, the friction between the materials to be welded increases the temperature of the interface and its vicinity and reaches in the thermoplastic state, with the action of upsetting force, the interface oxide film is broken, the material undergoes plastic deformation and flow, and the joint is formed by the interface element diffusion and recrystallization metallurgical reaction.

In actual production, continuous drive friction welding, phase-controlled friction welding, inertial friction welding and friction aluminium stir welding are more common.

Friction welding machine is mainly used for welding of medium-sized shaft parts. It can weld a wide range of metals, and has the characteristics of stable performance, high production efficiency and low energy consumption.

As one of the most professional friction welding companies, we provide with the best friction welding services, if you have any interests, please contact us.

Fire suppression pipe is a kind of normal carbon steel pipe for conveying water, gas and other fire suppression agents. It's usually in red. But the exterior of the light-wall pipes is galvanized silvery. Installation of red steel pipe is only to be used as wet sprinkler system. Dry and wet pipe sprinkler systems (including pre-action pipe sprinkler systems) are allowed to install galvanized pipes.

Since the installation of the first fire protection system,  black steel has been the traditional leader of the fire sprinkler pipe market bacause of its  strength, durability, and extreme resistance to heat exhibited. With a melting point between a whopping 2,600°F and 2,800°F (1,427°C and 1,538°C), steel pipe can withstand the heat of  burning buildings, it even can keep water flowing over a fire.

Steel Pipe for Fire Protection Systems

Steel pipe is suitable for all fire protection systems. It's easy to form, bend, and fabricate, which can be manufactured in various sizes, shapes and configurations. Steel pipe has been the main material of sprinkler piping systems for a long time. Steel is considered strong, durable and resistant to fire. With a melting point of about 2,700°F, steel pipe can withstand the heat of a burning building.

Steel pipe for sprinkler systems can be connected by screw thread, welded connection, rolling connection and groove cutting connection. Threading is only allowed for Schedule 40 or heavier pipe. However, if a lighter wall pipe is listed by a specialized thread testing laboratory, NFPA 13 (National Fire Protection Association) will allow the lighter wall pipe threads.

Fire Fighting Pipe's National Standard

GB/T5135.20-2010 standard

GB/T17219-1998 standard

CJ/T120-2008 standard.

GB50261-2010 national standard automatic sprinkler system Part 20: Coated steel pipes

Fire Fighting Pipe's Technical Parameter

Coating material: modified heavy anti-corrosion epoxy resin

Universal color: red

Coating thickness: 250um-550 um Coating method: Fluidized bed impregnation process, one-time film formation.

Fire Protection Piping Product specifications: DN15-DN1200

Ambient temperature: -30 ° C to 80 ° C (peak 760 ° C)

Regular pressure: 0.1Mpa-2.5Mpa

Connection method: thread, groove, flange connection, etc.

Application areas: fire water supply, gas supply, foam medium conveying pipeline system

With the development automation technology, automatic welding technology is more advanced. Automatic welding machine plays an important role in the application of various industries, and its application is expanding rapidly. In the modern industrial production, the mechanization and automation of the welding production process are the inevitable trends of the manufacturing industry. The automatic welding machine we provided, with more efficient, high welding precision and fast welding speed, can be widely used in many fields.

In the past 20 years, with the development of digital, automation, computer, mechanical design technology and the importance of welding quality, automatic welding has developed into an advanced manufacturing technology, and role automatic welding equipment plays in various industrial applications is more and more important, and the scope of application is expanding rapidly. In modern industrial production, the mechanization and automation of the welding production process is an inevitable trend in the modernization of the welding mechanism manufacturing industry.

According to the degree of automation, automated welding equipment can be divided into the following three categories:

1. Rigid automated welding equipment Rigid automatic welding equipment can also be called primary automatic welding equipment, most of which are designed according to the principle of open loop control. Although the entire welding process is automatically completed by the welding equipment, the feedback of the welding parameters during the welding process cannot be closed-loop feedback system, and the possible deviations cannot be randomly corrected.

2. Self-adaptive control automatic welding equipment The adaptively controlled welding equipment is a highly automated welding equipment, which is equipped with sensors and electronic detection lines, it can automatically guide and tracks the weld trajectory, and implements closed-loop feedback control of the main welding parameters. The entire welding process will be completed automatically according to preset procedures and process parameters.

Intelligent automatic welding equipment

It utilizes a variety of advanced sensing components such as vision sensors, tactile sensors, auditory sensors and laser scanners etc., and it makes uses of computer software systems, databases and expert systems with functions such as identification, judgment, real-time detection, calculation, automatic programming, welding parameters storage and the ability to automatically generate weld log files.

The composition of automated welding equipment:

1. Welding power supply, its output power and welding characteristics should be matched with the welding method to be used, and the interface connected with the main controller is installed.
2. wire feeder and its control and speed control system, for the wire feeder with higher requirements on wire feed speed control accuracy, its control circuit should add speed feedback
3. The welding machine head uses its moving mechanism, which consists of a welding machine head, a welding head support frame, a hanging type carriage, etc., and is used in a precision welding head mechanism. The drive system should adopt a servo motor equipped with an encoder.
4. Weldment movement or displacement mechanism, such as welding roller frame, head and tail frame turning machine, rotary platform and positioner, etc., precision moving position mechanism should be equipped with servo motor drive
5. weldment clamping mechanism
6. The main controller, also known as the system controller, is mainly used for linkage control of each component, control of welding procedures, setting, adjustment and display of main welding parameters. Control functions such as troubleshooting and man-machine dialogue can be expanded as necessary.
7. computer software, computer software commonly used in welding equipment includes: programming software, functional software, process software and expert systems, etc.
8. welding head guiding or tracking mechanism, arc pressure automatic controller, welding gun yaw and monitoring system
9. Auxiliary devices, such as wire feeding system, circulating water cooling system, flux recovery and conveying device, wire holder, cable hose, drag chain mechanism structure design and electrical control design these three parts.
10. Welding robots, also known as robotic arms, are an important part of automated welding equipment. Its main tasks include: welding, cutting, thermal spraying, carrying etc..

Application and value of automatic welding equipment in all-position welding

First, the automatic welding system industrial electronics is applied in the all-position welding, and the welding execution part is driven by the rotary pair to flexibly and reasonably change the posture of the welding torch, which is beneficial to the all-position welding work. At the same time, the motor power can be reduced while driving the same welding actuator. In the application, it is better to install the sensor at the welding position on the final stage deceleration shaft to detect the position of the welding gun. With this installation method, the control precision obtained is relatively high. In addition, by means of this memory on the automatic welding equipment, the parameters of the welding process and the weld tracking control program are stored, and the welding process parameters are stored in the arc welding power source, so that the advantages of the arc welding power source are further exerted. Through the cooperation of the two, it effectively solves various quality problems that may occur in all-position automatic welding operations.

Secondly, the driving of the welding torch is carried out by means of a stepping motor (the stepping motor is an open-loop control element stepping motor part that converts the electric pulse signal into angular displacement or line displacement). The digital input pulse model is effectively converted into a rotary motion by this motor. The accuracy of the component itself is high, and there is neither drift problem nor problems such as accumulated error. The application of this component in all-position welding not only keeps the rotational speed unchanged, but also controls the frequency signal to be relatively stable, and the torch displacement is more accurate.

Thirdly, in the all-position welding operation, the welding head and the arc welding power source are organically combined, which not only can achieve the purpose of full-position automatic welding, but also can reduce the price of the automatic welding equipment to a certain extent. In this way, not only can automatic welding be achieved, also the semi-automatic welding can be carried out by means of the arc welding power sources and the utilization of the semi-automatic welding torches.

Yiheda automation, one of custom automation companies, specializes in designing and manufacturing the China automatic production line to customers. We welcome merchants from all over the world to cooperate with our factory for mutual benefit and win-win, and jointly create a better future.

With the development automation technology, automatic welding technology is more advanced. Automatic welding machine plays an important role in the application of various industries, and its application is expanding rapidly. In the modern industrial production, the mechanization and automation of the welding production process are the inevitable trends of the manufacturing industry. The automatic welding machine we provided, with more efficient, high welding precision and fast welding speed, can be widely used in many fields.

In the past 20 years, with the development of digital, automation, computer, mechanical design technology and the importance of welding quality, automatic welding has developed into an advanced manufacturing technology, and role automatic welding equipment plays in various industrial applications is more and more important, and the scope of application is expanding rapidly. In modern industrial production, the mechanization and automation of the welding production process is an inevitable trend in the modernization of the welding mechanism manufacturing industry.

According to the degree of automation, automated welding equipment can be divided into the following three categories:

1. Rigid automated welding equipment Rigid automatic welding equipment can also be called primary automatic welding equipment, most of which are designed according to the principle of open loop control. Although the entire welding process is automatically completed by the welding equipment, the feedback of the welding parameters during the welding process cannot be closed-loop feedback system, and the possible deviations cannot be randomly corrected.

2. Self-adaptive control automatic welding equipment The adaptively controlled welding equipment is a highly automated welding equipment, which is equipped with sensors and electronic detection lines, it can automatically guide and tracks the weld trajectory, and implements closed-loop feedback control of the main welding parameters. The entire welding process will be completed automatically according to preset procedures and process parameters.

Intelligent automatic welding system industrial electronics

It utilizes a variety of advanced sensing components such as vision sensors, tactile sensors, auditory sensors and laser scanners etc., and it makes uses of computer software systems, databases and expert systems with functions such as identification, judgment, real-time detection, calculation, automatic programming, welding parameters storage and the ability to automatically generate weld log files.

The composition of automated welding equipment:

1. Welding power supply, its output power and welding characteristics should be matched with the welding method to be used, and the interface connected with the main controller is installed.
2. wire feeder and its control and speed control system, for the wire feeder with higher requirements on wire feed speed control accuracy, its control circuit should add speed feedback
3. The welding machine head uses its moving mechanism, which consists of a welding machine head, a welding head support frame, a hanging type carriage, etc., and is used in a precision welding head mechanism. The drive system should adopt a servo motor equipped with an encoder.
4. Weldment movement or displacement mechanism, such as welding roller frame, head and tail frame turning machine, rotary platform and positioner, etc., precision moving position mechanism should be equipped with servo motor drive
5. weldment clamping mechanism
6. The main controller, also known as the system controller, is mainly used for linkage control of each component, control of welding procedures, setting, adjustment and display of main welding parameters. Control functions such as troubleshooting and man-machine dialogue can be expanded as necessary.
7. computer software, computer software commonly used in welding equipment includes: programming software, functional software, process software and expert systems, etc.
8. welding head guiding or tracking mechanism, arc pressure automatic controller, welding gun yaw and monitoring system
9. Auxiliary devices, such as wire feeding system, circulating water cooling system, flux recovery and conveying device, wire holder, cable hose, drag chain mechanism structure design and electrical control design these three parts.
10. Welding robots, also known as robotic arms, are an important part of automated welding equipment. Its main tasks include: welding, cutting, thermal spraying, carrying etc..

Application and value of automatic welding equipment in all-position welding

First, the automatic welding equipment is applied in the all-position welding, and the welding execution part is driven by the rotary pair to flexibly and reasonably change the posture of the welding torch, which is beneficial to the all-position welding work. At the same time, the motor power can be reduced while driving the same welding actuator. In the application, it is better to install the sensor at the welding position on the final stage deceleration shaft to detect the position of the welding gun. With this installation method, the control precision obtained is relatively high. In addition, by means of this memory on the automatic welding equipment, the parameters of the welding process and the weld tracking control program are stored, and the welding process parameters are stored in the arc welding power source, so that the advantages of the arc welding power source are further exerted. Through the cooperation of the two, it effectively solves various quality problems that may occur in all-position automatic welding operations.

Secondly, the driving of the welding torch is carried out by means of a stepping motor (the stepping motor is an open-loop control element stepping motor part that converts the electric pulse signal into angular displacement or line displacement). The digital input pulse model is effectively converted into a rotary motion by this motor. The accuracy of the component itself is high, and there is neither drift problem nor problems such as accumulated error. The application of this component in all-position welding not only keeps the rotational speed unchanged, but also controls the frequency signal to be relatively stable, and the torch displacement is more accurate.

Thirdly, in the all-position welding operation, the welding head and the arc welding power source are organically combined, which not only can achieve the purpose of full-position automatic welding, but also can reduce the price of the automatic welding equipment to a certain extent. In this way, not only can automatic welding be achieved, also the semi-automatic welding can be carried out by means of the arc welding power sources and the utilization of the semi-automatic welding torches.

Dongguan Yiheda Automation Co.,Ltd, established in 2010, is an expert custom automation company, specializes in designing and manufacturing the custom automation solution to customers. If you are looking for automatic production machines, just contact us!

With the development automation technology, automatic welding technology is more advanced. Automatic welding machine plays an important role in the application of various industries, and its application is expanding rapidly. In the modern industrial production, the mechanization and automation of the welding production process are the inevitable trends of the manufacturing industry. The automatic welding machine we provided, with more efficient, high welding precision and fast welding speed, can be widely used in many fields.

In the past 20 years, with the development of digital, automation, computer, mechanical design technology and the importance of welding quality, automatic welding has developed into an advanced manufacturing technology, and role automatic welding equipment plays in various industrial applications is more and more important, and the scope of application is expanding rapidly. In modern industrial production, the mechanization and automation of the welding production process is an inevitable trend in the modernization of the welding mechanism manufacturing industry.

According to the degree of automation, automatic welding system equipment can be divided into the following three categories:

1. Rigid automated welding equipment Rigid automatic welding equipment can also be called primary automatic welding equipment, most of which are designed according to the principle of open loop control. Although the entire welding process is automatically completed by the welding equipment, the feedback of the welding parameters during the welding process cannot be closed-loop feedback system, and the possible deviations cannot be randomly corrected.

2. Self-adaptive control automatic welding equipment The adaptively controlled welding equipment is a highly automated welding equipment, which is equipped with sensors and electronic detection lines, it can automatically guide and tracks the weld trajectory, and implements closed-loop feedback control of the main welding parameters. The entire welding process will be completed automatically according to preset procedures and process parameters.

Intelligent automatic welding system industrial electronics

It utilizes a variety of advanced sensing components such as vision sensors, tactile sensors, auditory sensors and laser scanners etc., and it makes uses of computer software systems, databases and expert systems with functions such as identification, judgment, real-time detection, calculation, automatic programming, welding parameters storage and the ability to automatically generate weld log files.

The composition of automated welding equipment:

1. automatic welding machine and supply, its output power and welding characteristics should be matched with the welding method to be used, and the interface connected with the main controller is installed.
2. wire feeder and its control and speed control system, for the wire feeder with higher requirements on wire feed speed control accuracy, its control circuit should add speed feedback
3. The welding machine head uses its moving mechanism, which consists of a welding machine head, a welding head support frame, a hanging type carriage, etc., and is used in a precision welding head mechanism. The drive system should adopt a servo motor equipped with an encoder.
4. Weldment movement or displacement mechanism, such as welding roller frame, head and tail frame turning machine, rotary platform and positioner, etc., precision moving position mechanism should be equipped with servo motor drive
5. weldment clamping mechanism
6. The main controller, also known as the system controller, is mainly used for linkage control of each component, control of welding procedures, setting, adjustment and display of main welding parameters. Control functions such as troubleshooting and man-machine dialogue can be expanded as necessary.
7. computer software, computer software commonly used in welding equipment includes: programming software, functional software, process software and expert systems, etc.
8. welding head guiding or tracking mechanism, arc pressure automatic controller, welding gun yaw and monitoring system
9. Auxiliary devices, such as wire feeding system, circulating water cooling system, flux recovery and conveying device, wire holder, cable hose, drag chain mechanism structure design and electrical control design these three parts.
10. Welding robots, also known as robotic arms, are an important part of automated welding equipment. Its main tasks include: welding, cutting, thermal spraying, carrying etc..

Application and value of automatic welding equipment in all-position welding

First, the automatic welding equipment is applied in the all-position welding, and the welding execution part is driven by the rotary pair to flexibly and reasonably change the posture of the welding torch, which is beneficial to the all-position welding work. At the same time, the motor power can be reduced while driving the same welding actuator. In the application, it is better to install the sensor at the welding position on the final stage deceleration shaft to detect the position of the welding gun. With this installation method, the control precision obtained is relatively high. In addition, by means of this memory on the automatic welding equipment, the parameters of the welding process and the weld tracking control program are stored, and the welding process parameters are stored in the arc welding power source, so that the advantages of the arc welding power source are further exerted. Through the cooperation of the two, it effectively solves various quality problems that may occur in all-position automatic welding operations.

Secondly, the driving of the welding torch is carried out by means of a stepping motor (the stepping motor is an open-loop control element stepping motor part that converts the electric pulse signal into angular displacement or line displacement). The digital input pulse model is effectively converted into a rotary motion by this motor. The accuracy of the component itself is high, and there is neither drift problem nor problems such as accumulated error. The application of this component in all-position welding not only keeps the rotational speed unchanged, but also controls the frequency signal to be relatively stable, and the torch displacement is more accurate.

Thirdly, in the all-position welding operation, the welding head and the arc welding power source are organically combined, which not only can achieve the purpose of full-position automatic welding, but also can reduce the price of the automatic welding equipment to a certain extent. In this way, not only can automatic welding be achieved, also the semi-automatic welding can be carried out by means of the arc welding power sources and the utilization of the semi-automatic welding torches.

Exothermic Welding Products

Exothermic welding, also called hot melt welding, fire-clay welding, thermite welding and explosion welding, is a high-heat principle that utilizes the redox reaction between metals, the operation of which is simple, easy to learn, safe and efficient, and it has significant results in the production of high quality permanent welded joints between homogeneous metals and metals of different materials and is now well known to the public, becoming more popular in more and more architectural designs, and widely required to replace the connection method using conventional metal fixtures.

Exothermic Welding Supplies require high-quality graphite to form a cavity mold with a certain shape, such as line style (butt), T-joint (three-way), cross-type joint (four-way) and so on. The mold can be used multiple times, effectively saving costs.

Exothermic Welding Advantanges:

1. Good electrical conductivity: the current-carrying capacity of the welded joint surface is almost the same as that of the metal conductor, and the electrical conductivity is strong.

Experiments have shown that the the change rate of DC resistance before and after welding is close to zero, which is incomparable with any traditional connection mode.

2. Long and durable life: due to the high temperature fusion between the metal conductors during exothermic welding, an integrated permanent joint is formed, which is very strong and difficult to break and damage.
3. Strong corrosion resistance: the material of the welded point is mainly copper, and the corrosion resistance is almost the same as that of copper.
4. The operation is convenient and simple with no need for professionals but can be performed only after pepole are simply trained by professionals.
5. The requirement for operating environment is low, and no external power source or heat source is required for welding.

Operation flow of hot-melt welding

1. First, the mold and the welded conductor joint should be cleaned, and then the welded conductor should be fixed at the center of the mold cavity.
2. Close the mold and steadily place a metal protective gasket on the bottom of the mold furnace.
3. Pour in the exothermic welding flux, and evenly spread the starting powder on the surface of the flux and place it in an environmentally friendly starting powder.
4. Cover the mold, expose a part of the pyrophoric wrap at the mold opening, and then ignite the starting powder with an igniter.
5. After the hot-melt flux is ignited, a high temperature reaction occurs in the mold.
6. After the reaction is completed and cooled, the mold is opened and the welded conductor has been permanently connected.

Exothermic Welding for Grounding Precautions Flammable and explosive articles shall not be placed within 2 meters of the site during construction operation. Unrelated personnel shall not stay and operators must wear heat insulation gloves and related protective equipment.

Zhejiang, it is a professional enterprice, who focus on production and sales of copper clad earth rod. We welcome merchants from all over the world to cooperate with our factory for mutual benefit and win-win, and jointly create a better future.

0.8 Series  Copper Coated Stainless Steel Wire

Origin of new material development

0.8mm series copper-clad round wire is a new type of material developed by our Company to replace pure copper. Because it has the advantages of high strength, low price, high corrosion resistance and high conductivity of copper, and meanwhile its comprehensive performance is high and its cost is more economical than pure copper grounding device, it has been widely used in UHV lines, petrochemical industry, nuclear power and high-speed railway, especially in key projects in recent years.

Copper-clad steel:

The material in which the surface of a steel core is uniformly coated with copper includes copper-clad steel bars (for vertical grounding electrode only), copper-clad steel tape, and copper-clad steel wires (including round wires and stranded wires). According to the production process, it can be divided into continuous casting copper-clad steel and electroplating copper-clad steel.

Development of copper-clad steel grounding device

With the increasing voltage level of power lines and the increasing capacity of the system, higher requirements are put forward for the safety and reliability of grounding devices.

The traditional method in foreign countries is to use pure copper as the grounding material, but pure copper is expensive and it is a strategic resource, which is not suitable for being massively used as grounding devices in China. From 1910 to 1955, National Bureau of Standards (NBS) conducted corrosion resistance studies of grounding bodies. 36,500 samples collected at 128 test sites throughout the United States represented 333 metal materials consisting of iron, non-ferrous metals and protective coatings, respectively. The test results show that only steel bars and stainless steel bars with copper plating thickness over 0.5mm can be accepted.

In addition, continue the statistical data of 8 to 30 years and take the test results of 43 copper samples in different soils, 41 of which were calculated, to get the 0.17mm average pitting depth of 30 years. Therefore, some international standards have determined the thickness of copper coating of copper-clad steel material to be at least 0.25 mm. Considering the hard friction during construction, it is suggested that the thickness of copper coating be defined as 0.5-0.8 mm.

In China, copper clad(copperweld) steel materials are widely used in substation grounding grids in areas with high soil resistivity. Because of the characteristics of UHV project, such as high voltage level, large capacity and short power cut window period, combined with the corrosion intensity of groundwater in the area, copper-clad steel grounding devices have been applied in UHV lines and many UHV lines in China use copper-clad steel materials as grounding bodies.

Comparison between copper-clad steel grounding and traditional hot-dip galvanized steel grounding device

1. Corrosion rate comparision
   Annual corrosion rate of grounding materials in some place of Beijing and Tianjin

The test results show that galvanized steel has the most serious corrosion and its corrosion rate is more than 50 times higher than that of pure copper; the corrosion degree of stainless steel is much lower than that of pure copper and copper-clad steel, showing good corrosion resistance; as a copper-steel composite material, the self-corrosion potential of copper-clad steel in soil is basically the same as that of pure copper, and its corrosion rate is the same as that of pure copper; the corrosion rate of the electroplated copper-clad steel with thinner coating is higher than that of the continuous casting copper-clad steel with thicker coating.

2. Analysis and comparison of physical performance in short circuit

If the conductivity of copper were 100% and the conductivity of standard 1020 steel were only 10.8%, the conductivity of copper would be about 10 times that of steel. However, the conductivity of the 30% conductivity copper-clad round wire would be 30%, and the conductivity of the 40% conductivity copper-clad round wire would be 40%, which would be far better than the steel grounding body. Especially under skin effect, the conductivity of copper-plated strands at high frequencies would be much better than that of steel, that is, the conductivity of copper grounding body would be better than that of steel grounding body. The melting point of copper is 1083℃ and the maximum allowable temperature during short circuit is 450℃ ; the melting point of steel is 1510℃ and the maximum allowable temperature during short circuit is 400℃. Therefore, when the grounding body has the same cross section, the copper-clad steel grounding material has better thermal stability.

3. Economic comparison

According to Appendix D of Technical Conditions for Copper-clad Steel for Grounding in Electrical Engineering, the corrosion rates of copper clad steel in different soils are calculated according to the reference values in table. Corrosion rate of pure copper under different soil corrosion grades (mm/a)

The 0.8mm copper plating thickness is enough to meet the requirement of 60 years of service under the grade of III extremely strong corrosion.

The corrosion rate of galvanized steel is nearly 50 times that of copper-clad steel under the same soil conditions, and the grounding body should be overhauled after being used for 3-5 years.

The State Grid has accounted the UHV tower according to the drawings: after the investigation of the market price of material during the construction, the market price of the copper-clad-steel grounding body is calculated at RMB 20 /m, the market price of φ12 galvanized-steel round steel grounding body is calculated at RMB 6 /m and the grounding body laying is calculated according to the grounding construction drawing. During the 30-year whole life cycle, galvanized steel is overhauled every 5 years, of which the cost of material is RMB 20 /m for copper-clad steel and RMB 36/m for galvanized steel, that is, only material cost can be reduced by 80%. Galvanized steel can be overhauled and replaced six times. If the construction cost is RMB 70 /m3 for earthwork and stone works and each base tower is calculated by 23 m3 for excavation, RMB 9660 per base tower will be saved.

Copper-clad steel construction

The horizontal laying of the copper-clad steel grounding device is the same as that of the ordinary galvanized round steel, where only the connection method is changed to hot-melt welding, which has reduced the contact resistance between the joints and is more conducive to the release of lightning current.

Exothermic welding, also known as "aluminum heat welding", is a simple, high-efficiency, high-quality metal joining process that has been mass-produced and used in China in recent years. Exothermic welding uses chemical reaction heat of metal compounds as heat source and through superheated (reduced) molten metal or indirect heating, a certain shape and size of the melted joint is formed in the cavity of the special graphite mould, which meets the engineering requirements, and finally through cooling and condensation, the welding process is realized. At present, exothermic welding has generally replaced the mechanical connection between metals in the past.

Advantages of copper-clad steel

1.It has strong corrosion resistance and will not be disjointed, warped or cracked. The corrosion in the grounding body of the grounding grid is reduced, which has improved the overall operational safety of the equipment;

2. It has good electrical conductivity and stable electrical performance;
3. The copper layer and the steel bar achieve molecular bonding, and the grounding bar will not break down when it penetrates into the soil.
4. The copper-clad-steel grounding material used has high efficiency of reducing the resistance, and the length of the horizontal grounding body is reduced by 1/3 for the design of the high-resistance section, greatly reducing the excavation amount of the earthwork;
5. The design and use of exothermic welding technology is very suitable for the needs of field construction, greatly improving work efficiency and effectively shortening the construction period.

Performance parameters of copper-clad steel wire

Copper layer thickness:0.8mm; tensile strength: greater than 500MPa; copper-clad steel bent 180° without peeling off copper layer.

Specification of 0.8mm series copper-clad round steel: Soft copper-clad round bars are generally packaged in hanks or rolls, 100 meters per roll, easy to transport, suitable for laying of large grounding grids and horizontal grounding lines.

Usage:key projects, large grounding grids and horizontal grounding wires in industries with higher lightning protection requirements, etc.

Note:

1. If the thickness of copper layer is required to be 1 mm, please contact us directly.
2. We undertake custom-made zinc-clad steel ground rod and round steel.

Production method of copper clad steel technical field The invention specifically relates to a production method of copper clad steel.

Background technologycopper clad steel

The conductivity of existing copper clad steel products is not good, far inferior to that of pure copper products. The reason is that the overall product performance is insufficient when copper is coated on steel materials in the process.

Summary of the invention

In view of the above technical problems, the invention provides a production method of copper clad steel.

A copper clad steel production method comprises the following steps:

1. Surface treatment of steel wire;
2. Stripping and wire drawing of the treated steel wire;
3. Straightening and polishing the treated steel wire.
4. Heating the treated steel wire to 300-400 degrees.
5. Melting copper into water in high temperature furnace.
6. The steel wire in step D is coated with copper water in step E and then cold crystallized to form the product.

Preferably, the  copper plated steel wire  surface treatment in step A is a mechanical grinding treatment without water contamination.

The invention provides a production method of copper clad steel. The conductivity of the product obtained by the method is close to that of the pure copper product, the cost is greatly reduced, and the service life is prolonged.

Ningbo Zhenhai Beisuda Petrochemical Equipment Co.,Ltd located in Ningbo, Zhejiang, it is a professional enterprice, who focus on production and sales of copper clad earth rod. We welcome merchants from all over the world to cooperate with our factory for mutual benefit and win-win, and jointly create a better future.

The most important function of laser automatic welding machine is to use the laser beam with very high energy density as a heat source to achieve the welding effect. Generally speaking, the use of continuous laser beam can reflect the role of welding to better achieve good welding effect at the same time. Usually there are certain technological parameters for laser automatic welding machine. Then, what are the main process parameters of laser automatic welding machine with high quality and quantity?

1. The power density requirement of laser automatic welding machine:

Power density is one of the most important parameters of laser automatic welding machine. For example, high power density can heat the surface to boiling point in microsecond time and produce a lot of vaporization, which can make the precision welding and seamless welding of processing materials better.

2. Pulse waveform of laser automatic welding machine:

Pulse waveform of laser automatic welding machine is an important element for laser welding of thin sheet material. For example, when high intensity laser beam is applied to the surface of material to be welded, most of the reflectivity of metal surface will decrease and its reflectivity will change with the surface temperature. So we should pay attention to the change of metal reflectivity caused by laser pulse waveform in laser automatic welding machine.

3. Pulse width of laser automatic welding machine:

Pulse width of laser automatic welding machine is an important parameter to distinguish material of removal and melting in laser welding. It is also a key parameter to determine the cost and volume of processing equipment. This parameter is suitable for precision machining, and the general material can be neglected.

4. Defocus of laser automatic welding machine:

Defocusing is usually a process parameter that has an effect on the quality of laser automatic welding machine. In order to prevent the evaporation of holes caused by the high power density of the spot center at the laser focus, people should pay attention to the need for defocusing during laser welding.

RF dryer is a kind of high efficiency leather drying equipment.

Working principle

In the high-frequency electric field, the dielectric water in the wet leather will be affected by the electric field, causing molecular disturbance and friction and heat between molecules, so that the moisture in the leather will get enough heat and vaporize, and then the steam will be taken away by the air to achieve the purpose of leather drying.

Characteristics of RF dryer

(1) The drying speed is fast because the electrical energy into heat, high frequency electric field and leather do not need any intermediary, so in the moment that leather is electrified, heat will produce, to achieve the purpose of rapid drying.

(2) Uniform drying, good leather quality if the leather dry to the specific moisture content, will encounter a lot of problems, one of them is the moisture uniformity problem. In the past, most tanneries have dried the leather to a leathery state and then rewetted it. It is said that only in this way can the leather have a uniform moisture content so that it can be tendered. The high frequency heating drying method is very different, the leather part of the absorption of heat is proportional to the moisture content of the part. As a result, the wet parts absorbed more heat energy, so that the moisture content of the whole skin became uniform. The traditional drying method can only carry out conventional drying, the wet parts retain more water, unless it is always drying, until all the water evaporation, so it is very easy to cause excessive drying and loss of area.

(3) Easy to operate, easy to control temperature, easy to achieve automation.

• High power consumption, gasification of 1kg of water about 8kW·h power.

Exothermic welding, also called hot melt welding, fire-clay welding, thermite welding and explosion welding, is a high-heat principle that utilizes the redox reaction between metals, the operation of which is simple, easy to learn, safe and efficient, and it has significant results in the production of high quality permanent welded joints between homogeneous metals and metals of different materials and is now well known to the public, becoming more popular in more and more architectural designs, and widely required to replace the connection method using conventional metal fixtures.

Exothermic welding products require high-quality graphite to form a cavity mold with a certain shape, such as line style (butt), T-joint (three-way), cross-type joint (four-way) and so on. The mold can be used multiple times, effectively saving costs.

Exothermic Welding Advantanges:

1. Good electrical conductivity: the current-carrying capacity of the welded joint surface is almost the same as that of the metal conductor, and the electrical conductivity is strong.

Experiments have shown that the the change rate of DC resistance before and after welding is close to zero, which is incomparable with any traditional connection mode.

2. Long and durable life: due to the high temperature fusion between the metal conductors during exothermic welding, an integrated permanent joint is formed, which is very strong and difficult to break and damage.
3. Strong corrosion resistance: the material of the welded point is mainly copper, and the corrosion resistance is almost the same as that of copper.
4. The operation is convenient and simple with no need for professionals but can be performed only after pepole are simply trained by professionals.
5. The requirement for operating environment is low, and no external power source or heat source is required for welding.

Operation flow of hot-melt welding

1. First, the mold and the copper clad steel groundingshould be cleaned, and then the welded conductor should be fixed at the center of the mold cavity.
2. Close the mold and steadily place a metal protective gasket on the bottom of the mold furnace.
3. Pour in the exothermic welding flux, and evenly spread the starting powder on the surface of the flux and place it in an environmentally friendly starting powder.
4. Cover the mold, expose a part of the pyrophoric wrap at the mold opening, and then ignite the starting powder with an igniter.
5. After the hot-melt flux is ignited, a high temperature reaction occurs in the mold.
6. After the reaction is completed and cooled, the mold is opened and the welded conductor has been permanently connected.

Welding For Grounding Precautions Flammable and explosive articles shall not be placed within 2 meters of the site during construction operation. Unrelated personnel shall not stay and operators must wear heat insulation gloves and related protective equipment.

We can provide you various exothermic welding supplies, RFQ today!

RF heat sealing equipment uses the friction heat generated on the contact surface of two workpieces to be welded to melt the plastic. Heat energy comes from a certain pressure, a workpiece on another surface with a certain displacement or amplitude reciprocating movement. Once the desired degree of embossing is achieved, the vibration will stop, but there will still be a certain amount of pressure on the two workpieces, so that the just embossed part of the cooling, curing, thus forming a close combination.

Characteristics of RF heat sealing equipment

1. High frequency thermal sealing equipment anti-wave interference device: high frequency stabilizer and high frequency magnetic field shielding system device, to minimize the high frequency interference, effectively solve the impact of high frequency interference on other machines or residents.

2. RFsealing equipmentweek stability: the use of international industrial band 27.12MHZ, stable output cycle, in line with the international industrial band standard.

3. RFsealing machinesoutput force is strong, reliable performance: low loss coaxial oscillator, with tuner, strong output force shorten welding time, improve output.

4. RF heat sealing equipment high-sensitivity spark arrester: relay, detection of excessive current.

5. Safety performance: in the work or static, whether it is suddenly encountered power failure or gas stop, or power or ventilation, the machine is stationary state, keep the original position, it will not suddenly rise or fall; Greatly improve the safety of workers operating problems.

6. RF heat sealing equipment heating device: stepless heating thermostat, according to the production needs of different products, may adjust the temperature, let the working efficiency is higher.

7. RF heat sealing equipment automatic over-current protection system: automatic over-current protection system, can increase the service life of the vacuum tube, protect the mould. Can choose direct or indirect oiling pressure oiling pressure. The output force is strong and the machine structure is solid. Double station foot control, convenient and quick, special mechanical structure, high output pressure.

8.RF heat sealing equipment is easy to high-speed tuner: the output power can be adjusted by the tuner depending on the size of the electrode and material thickness, with the exception of a variety of control devices and special electronic circuit, can greatly reduce the necessary welding time, improve the production of the machine.

Impulse refers to the welding current waveform is discontinuous, current size changes.

Generally speaking, pulse type spot welder refers to the sinusoidal alternating current is SCR, divided into sections of current, commonly known as pulse welder. In other words, pulse mode of operation refers to the mode of operating only once every certain interval.

At present, single pulse and double pulse are mostly used in welding.

Conventional pulse gas welding: only one pulse. All the peaks of a monopulse are the same like NNNNN. Pulse gas welding machine is the use of pulse current to achieve droplet transition welding mode, no splash, deep penetration, fine grain, high weld strength, suitable for all-position welding, from 20 a to 500A can achieve stable quality welding, welding performance is far better than the ordinary gas welding machine, is the mainstream direction of welding machine development. Double pulses are equivalent to the superposition of two single pulses with the same period and different phases. In other words, one period may have two peaks: nNnNnN.

Double pulse gas shielded welding is a welding method developed on the basis of pulse gas shielded welding. It is a welding method with alternating changes of two pulse gas shielded welding methods with different current sizes. It is mainly used in the welding of aluminum alloy, and it can produce the effect of fish-scale pattern without swing, similar to the effect of ac TIG welding. In addition, this welding method can effectively control the heat input, which is similar to the pulsed argon arc. It can be fully welded without penetration, and is suitable for all metal welding. It is an advanced welding method.

Application advantages of impulse welding:

There is no spatter in the welding process, the heat affected area is small, especially for the thin plate welding has obvious advantages, the consistency of energy waveform output can be guaranteed from beginning to end, and the fusion depth and weld pile height are fully consistent. Double pulse can be used for welding aluminum alloy and stainless steel. No spatter during welding, easy to operate, suitable for manual and automatic welding, arc stability, adjustable depth, beautiful shape, less porosity, excellent mechanical properties and other characteristics! It is widely used in aluminum alloy, steel ship, locomotive, automobile parts, automobile manufacturing, aerospace, colleges and research institutions, heavy industry machinery, pipe making, steel structure, coal mining machinery, etc.

Buy hf welders on hf-weld.com!

If the time of hf welding pvc is too long, there are often some faults. After the failure occurs, users must find and deal with it in the first time and solve it in time. For different faults, the solutions are different. The following solutions are listed here for everyone:

If the welding effect is not ideal or it cannot be welded or the workpiece is damaged when it is in the process of hf welding pvc, we can not think that it is the problem of equipment. It could be other problems. For example: equipment setting error, blown fuse and so on may happen.

Common failure analysis and solutions:

1. If there are bubbles in the process of hf welding pvc with workpieces, it is not directly related to the equipment usually.

(1) situation of loose connection

it is possible that the flow meter of the gas regulator has been damaged or blocked with sundries.

(2) there may be sundries on the surface of the workpiece.

2. it is not directly related to the equipment if the voltage is unsteady in the process of hf weldingpvc with workpieces.

(1) loose connection wire between the main machine and the extension machine

(2) the induction coil is out of shape or there is no distance between the coil and the coil, or the induction coil is loose.

If above circumstance has been excluded, it still cannot work normally, users should turn off equipment and ask professional technicians to repair the equipment. If the device suddenly stops working in the process of use, you should immediately turn off the device and check the host, and wait for 3-5 minutes before starting up. If it can not work normally after turn it on, ask professional technicians to repair the equipment. But users also need to be skilled in using the equipment, and can make an accurate judgment of the corresponding fault to timely solve the fault, reduce the waste and loss of equipment and production.

 High frequency sealing machine  is the first choice of plastic heat sealing equipment. The principle is different from plastic welding machine with conduction of heat because it is the use of high-frequency electric field polar molecules to produce plastic torsion friction heat, and thus to achieve the purpose of welding. The welding temperature is uniform in the outside and the inside.

It is mainly used for all kinds of plastic welding, welding, etc., which are on the basis of PVC (PVC). And it makes blister with different shapes or blisters plastic to weld automatically as well as trimming at the same time. It is suitable to use for two-sided welding of plastic uptake, bubble shell of plastic uptake and for sealing paper card. For special plastic material (PE, PS, PETG) with sealing, the PVC material with more than 30% for plastic welding is the best. Plastic packaging contains (including two-sided blister, blister, and cardboard with heat)automotive interior leather, trademarks, stationery, raincoats, inflatable toys, plastic products, shoe cover, bed, cushion, bags, handbags and other soft sealing processing, pressing various concave-convex patterns, alphabet, bronzing etc..

※ The stabilization of frequency

Yu Fei high frequency adopts the industrial band 6.78/13.56/27.12/40.68MHZ and designs a filter, bypass, isolation device which has a little interference to the outside equipment and reach 1/100 of radiant frequency in national standards according to the International Committee on radio interference (CISPR). It is far better than the national standard.

※ The suspension of sparks

Yu Fei high frequency with high sensitivity spark suppression circuit can accurately detect spark current imbalance, and to cut off oscillating circuit to suspend sparks quickly as they are produced in the instant, making minimize the damage to mold, raw materials, and products. In the meantime, the warning lights will raise up.

※ The automatic control of oscillating current

The oscillating current of adjusting the material thickness of Yu Fei high-frequency output power can be set according to the size and thickness of the products. And then the current will be regulated automatically to control the degree of welding in order to ensure the quality of products are uniform. Also, it can lower the consuming time of welding greatly and increase the productive speed of the machine.

The high frequency of Yu Fei is equipped with overvoltage and overcurrent protection device. It can automatically cut off the high voltage to protect the oscillation tube and rectifier when the work is abnormal and avoid the frequency drift caused by improper operation.

Yu Fei is committed to decades of research on high frequency and high frequency equipment. Their products are exported to India, Thailand, Ukraine, Turkey, Slovakia, Russia, and other countries. It is leading in technology whose new models maintains international leadership from the beginning to end. It is popular among the customers home and abroad and receives identical favorable comments.