How to deal with welding failure of spot welding machine?

1. When welding, the position of the electrode rod should be adjusted first, so that when the electrode is just pressed to the weldment, the electrode arms remain parallel to each other.

2. The selection of current adjustment switch stages can be selected according to the thickness and material of weldments. After power on, the power indicator light should be on, and the electrode pressure can be adjusted by changing the compression degree of the spring pressure nut.

3. After the above adjustment is completed, the cooling water can be switched on first and then the power supply can be switched on to prepare for welding. The procedure of the welding process: the weldment is placed between the two electrodes, step on the pedal, and make the upper electrode contact the weldment and pressurize it. When the pedal is continued to be pressed, the power contact switch is turned on, and the transformer starts to work. The secondary circuit is energized to heat the weldment. When the electrode rises when the pedal is released after welding for a certain period of time, the power supply is cut off first and then restored to its original state by the pulling force of the spring, and the single point welding process is over.

4, weldment preparation and assembly: dirt, oil stains, oxidized skin and rust on the surface of the welding spot shall be removed before welding of steel weldments. for hot rolled steel, it is better to pickl, sand blast or remove oxidized skin with grinding wheel at the welding place. Although uncleaned weldments can be welded, the service life of the electrode is seriously reduced, and the production efficiency and quality of spot welding are also reduced.