The principle of the capacitor discharge spot welder is to charge a group of high capacity capacitors in advance by a smaller transformer and then discharge the welded parts by a high power resist welding transformer.
The outstanding features of the capacitor discharge welder are short discharge time, high instantaneous current, heat affected deformation after welding, and small discoloration. The low power capacitor discharge spot welder is suitable for welding precision parts, and the high power capacitor discharge spot welder is suitable for multi-point projection welding, ring projection welding and sealed projection welding.
The metal pipe cap and pipe seat are placed in the corresponding specification of the upper and lower welding molds, a certain welding pressure is applied, and the energy stored in the energy storage capacitor for a long time is used to obtain a larger welding current with the energy released at the moment of welding, and the contact resistance converts the electrical energy into heat energy to realize the welding process.