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The influence of three major parameters of copper wire butt welding machine on the joint
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The influence of three major parameters of copper wire butt welding machine on the joint
Release time:2022.05.11
Summary of information:
The three major parameters of the copper wire butt welding machine include welding current, welding time and upsetting force. Some have a ramp-up time (the current rises steadily, designed to suppress splashing)
Copper wire butt welding machineThe three major parameters include welding current, welding time and upsetting force. Some have a ramp-up time (the current rises steadily, designed to suppress splashing)
1. Welding current
The influence of welding current on heat production is greater than that of resistance and energization time. It is a square proportional relationship, so it is an important parameter that must be strictly controlled.In addition to the total amount of current, current density also has a significant impact on heating.
Excessive current density will cause weld metal to spatter, form cavities, weld cracks and reduce mechanical properties.
2. Influence of welding time
During resistance spot welding, in order to ensure the nugget size and solder joint strength, the welding time and welding current can complement each other within a certain range. The total heat can be changed by adjusting the current or the welding time. But the heat transfer situation is related to time.
In order to obtain a solder joint with a certain strength:
➢Can be welded under high current and short time under strong conditions (hard specifications);
➢Welding under weak conditions (soft specification) with low current and long time can also be used.
3. Upsetting force
The function of upsetting pressure is to squeeze out oxides and other harmful impurities in the plastic deformation layer, and to make the weld be forged and fused uniformly. It is adjusted mainly through upsetting screws. If the upsetting force is too small, the deformation will be insufficient and the joint strength will be reduced. If the upsetting force is too large, the deformation will be too large, the crystal grain will be severely bent, and the impact toughness of the joint will be reduced.
Wuxi Xinxing Welding Equipment Factory has focused on resistance welding machines for 29 years and has core technology. Its products include: manual butt welding machine, pneumatic-flash butt welding machine, multi-strand wire welding machine, foot spot welding machine, pneumatic spot welding machine, medium frequency spot welding machine, row welding machine-welding production line, resistance automatic welding machine, energy storage welding machine, copper rod aluminum rod steel rod welding machine, automobile parts spot Welding machine, sheet metal box shell spot welding machine, home appliance hardware spot welding machine, electronic appliance spot welding machine, copper bar copper pipe welding machine, nut spot welding machine, stainless steel welding machine, foil belt spot welding machine, aluminum spot welding machine, multi-head spot welding machine, bag cage spot welding machine, mesh row welding machine, ton barrel frame welding production line, resistance automatic welding machine, brazing machine, diffusion welding machine, projection welding machine, seam welding machine,Wire and cable optical cable supporting equipmentThere are more than 300 types. If you are interested in our welding equipment, please contact us.
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9 problems and solutions for automatic flash butt welding machine
Summary of information:
1. The burning is too violent and produces a strong explosion sound. Reduce the transformer stage; slow down the burning speed. 2. The flash is unstable. Remove the oxides at the bottom and surface of the electrode; increase the transformer stage; speed up the burning speed. 3. There is an oxide film, incomplete welding or slag inclusion in the joint. Increase the degree of preheating; speed up the upsetting.
1. Burning is too violent and produces a strong explosion sound
Reduce the number of transformer stages; slow down the burning speed
2. The flash is unstable
Remove oxides from the bottom and surface of the electrode; increase the number of transformer stages; speed up the burning speed
3. There is oxide film, incomplete welding or slag inclusion in the joint.
Increase the degree of preheating; speed up the degree of burning when approaching upsetting; ensure the electrified upsetting process; speed up the upsetting speed; increase the upsetting pressure.
4. There are shrinkage holes in the joints
Reduce the number of transformer stages; avoid excessively violent burning process; appropriately increase the upsetting allowance and upsetting pressure.
5. The weld seam is overheated
Reduce the degree of preheating; speed up the burning speed and shorten the welding time; avoid excessive live upsetting.
6. Joint cracks
Check the carbon, sulfur, and phosphorus content of the steel bars. If the steel bars do not meet the requirements, replace the steel bars; adopt a low-frequency preheating method to increase the degree of preheating.
7. Small surface melting and burns
Eliminate rust and oil stains on the clamped parts of the workpiece; eliminate oxides on the inner surface of the electrode; improve the shape of the electrode notch and increase the contact area;
Clamp the workpiece.
8. The joint axis deviates or bends
Correctly adjust the electrode position; trim the electrode jaws or replace deformed electrodes; cut off or straighten the elbows of the steel bars
9. Joints burn unevenly
Increase the degree of preheating; control secondary flash to avoid premature upsetting.
Wuxi Xinxing Welding Equipment Factory has been engaged in resistance welding for 29 years. Its core technical products include: semi-automatic butt welding machine, pneumatic-flash butt welding machine, multi-strand wire welding machine, foot pedal spot welding machine, pneumatic spot welding machine, medium frequency spot welding machine, row welding machine mesh welding machine, resistance automatic welding machine, energy storage welding machine, copper rod and aluminum rod disc circular welding machine, auto parts spot welding machine, sheet metal spot welding machine, home appliance hardware spot welding machine, small electrical appliances There are more than 300 types of spot welding machines, copper bar copper tube welding machines, nut spot welding machines, stainless steel welding machines, foil strip spot welding machines, aluminum spot welding machines, multi-head spot welding machines, bag cage spot welding machines, mesh welding machines, ton rack welding production lines, automatic resistance welding machines, brazing machines, diffusion welding machines, projection welding machines, seam welding machines, wire and cable optical cable supporting equipment, etc. If you are interested in our welding equipment, please contact us.
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