Why is manual copper wire butt welding machine enough?

1) Before welding, you should adjust the transformer stages, turn on the cooling water, and check the components and grounding conditions of the butt welding machine before starting work.

2) Before work and when changing the steel bar grade or diameter, trial welding should be carried out according to relevant regulations, and tensile and cold bending tests should be carried out. Only after passing the test can welding in batches.

3) Before welding, rust and dirt should be removed from the electrode jaws at the ends of the steel bars to facilitate the passage of current and prevent "ignition" caused by poor contact at the jaws.

4) The ends of the steel bars should be kept straight. If there are bends and twists, they should be straightened or cut off. The electrode jaws should be fixed firmly and the two steel bars should be in the same straight line. During the welding process, welding slag, rust and other dirt on the electrodes should be removed at any time, and brushing should be done properly at the end of each shift.

5) When preheating flash welding is used for grade II and III steel bars, the key points of operation are: one flash, the flash level shall prevail; sufficient preheating, the frequency should be high; the second flash should be short, stable and strong; the upsetting process should be fast and powerful. For Grade IV steel bars, due to the high carbon, manganese, and silicon content, oxidation defects are easily produced in the weld and heat-affected zone during welding, and they are prone to brittle fracture due to overheating and quenching. When welding, the appropriate temperature should be mastered, and the welding parameters should be adjusted appropriately according to the temperature. The key points of its operation are:
One flash is used to remove crushing injuries; the preheating is moderate and the frequency is medium to low; the second flash is steady and strong; the upsetting process is fast and with appropriate force.
When preheating steel bars at low frequency, the preheating contact time should be between 0.5~2s/time according to the grade and diameter of the steel bars. The preheat gap time is slightly larger than the contact time of each preheat.
There should be a certain contact pressure during preheating. The degree of preheating should be controlled by combining the preheating allowance and the number of preheating times.

6) Steel bars of different diameters can be butt welded, but the ratio of the two cross-sectional areas should not be greater than 1.5 times, and the diameter difference should not be greater than 2^~3mm. When welding, the welding parameters should be selected according to the large diameter steel bars.

7) When flash welding is performed under negative temperature (not less than -20oC), it should be welded indoors, weak parameters should be used, the adjustment length should be appropriately increased, the transformer series should not be too large, the flash speed should be slightly slower, the number of preheating times should be increased, and the joints should be maintained with asbestos powder and other materials.
8) After welding, wait until the joint turns from red to black before loosening the clamp and taking out the steel bar smoothly to prevent the joint from bending.

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.