The main problems that should be paid attention to when using butt welding machine

15 Jun 2022

(1) The worktable for feeding and feeding the material should be kept level with the lower part of the cutter, and the length of the worktable can be determined according to the length of the processed material. When processing long steel bars, there should be a special person to help, and obey the instructions of the operator, and do not push or pull arbitrarily. (2) Before starting, it must be checked that the cutter should be free of cracks, the bolts of the tool holder are fastened, and the protective cover is firm. Then turn the pulley by hand, check the gear meshing clearance, and adjust the cutter clearance. (3) After starting, it should be idling first to check that the transmission parts and bearings are running normally before operation. (4) The material shall not be cut when the machine does not reach the normal speed. When cutting, the middle and lower parts of the cutter must be used, and the steel bar should be grasped and fed quickly to the knife edge. It is strictly for...

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The composition of automatic welding equipment

08 Jun 2022

1. The welding power source, its output power and welding characteristics should match the welding process method to be used, and be equipped with an interface connected to the main controller. 2. Wire feeder and its control and speed regulation system, for the wire feeder that requires higher control accuracy of wire feeding speed, its control circuit should increase the speed measurement feedback 3. The welding head uses its moving mechanism, which consists of the welding head, the welding head support frame, the hanging carriage, etc. It is based on the precision welding head mechanism, and its drive system should use a servo motor equipped with an encoder 4. Weldment moving or displacement mechanism, such as welding roller frame, head and tail frame turning machine, slewing platform and positioner, etc. The precise mobile displacement mechanism should be driven by servo motor 5. Weldment clamping mechanism 6. The main controller, also known as the system controller, is mainly used ...

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Types of automatic welding equipment

02 Jun 2022

According to the degree of automation, automated welding equipment can be divided into the following three categories: 1. Rigid automatic 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 whole welding process is completed automatically by the welding equipment, it cannot be a closed-loop feedback system for the fluctuation of welding parameters during the welding process, and the possible deviation cannot be corrected randomly. 2. Adaptive control of automatic welding equipment Adaptive control welding equipment is a kind of welding equipment with a high degree of automation. It is equipped with sensors and electronic detection circuits to automatically guide and track the welding seam trajectory, and implement closed-loop feedback control of the main welding parameters. The whole welding process will be completed automatically according to...

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Preheat and interpass temperature

23 May 2022

When welding structural steel, especially when the thickness is greater than 25mm, the preheating temperature of the weldment should be determined according to the chemical composition, thickness, ambient temperature, etc., and through the weldability test and production test. Preheating can increase the welding speed, thus reducing the residence time of the molten pool metal at high temperature or reducing the burnout of alloying elements. At the same time, it can increase the stirring and fusion ability of the molten pool, accelerate the diffusion and escape of hydrogen, and prevent the generation of pores. Preheating can also appropriately reduce the welding current, which is convenient for beginners to operate. The following weldments or environments require preheating of weldments: ① Weldments with higher welding strength ② Welding of steels with a tendency to harden ③ Welding materials with particularly good thermal conductivity ④ Weldments with larger thickness ⑤ When the ambien...

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Influencing factors of porosity in argon arc welding

17 May 2022

As we all know, argon arc welding has many advantages: 1. Good protection effect, high welding quality, no spatter, and beautiful welding seam. 2. The welding deformation is small, it can realize single-sided welding and double-sided forming, ensure the penetration of the root, and can carry out welding in various positions. 3. Various metals and alloys can be welded. How are the pores in the weld created? 1. Influencing factors of pores: the purity of argon gas, the size of argon gas flow, the size of wind speed (wind protection measures should be taken when the wind speed is > 2 m/s), the diameter of the welding torch nozzle is too small, the distance between the welding torch nozzle and the workpiece is large , The pressure in the gas cylinder is too small (the pressure should be disabled when the pressure is less than 1 MPa), the angle of the welding torch is too large, and the accessories of the welding torch are not suitable. 2. Influence of welding materials: The welding wire...

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Whether the welding shape looks good or not is related to the welding sequence

11 May 2022

The so-called welding sequence refers to which part of the welding structure is welded first and which part is welded later, or which weld is welded first and which weld is welded last, that is, the welding sequence of each weld. Improper selection of welding sequence affects the welding quality as follows: (1) The welding sequence directly affects the stress and deformation of the weldment. If the selection is improper, it will cause excessive deformation or internal stress of the weldment, which not only reduces the quality of the weldment, but also causes the weldment to be scrapped in severe cases. (2) Improper selection of assembly welding sequence often results in difficulty in welding of welds at certain positions, or even impossible to weld at all. Seriously reduce the strength or air tightness requirements of the welded structure. (3) If the welding sequence of the stainless steel welding structure is not selected properly, the working weld in contact with the corrosive medium...

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