How does the commutator spot welder control the precision

    The commutator spot welding machine control device combines the functions of welding cycle automation and general current adjustment. According to welding process requirements, the control device can also add some other functions. There are some points and projection welding machine control boxes in China. The welding cycle has 10 main programs; there are three power pulses for preheating, welding and tempering. Each pulse also has a pulse adjustment modulator for "heating" and "interval" cycles. , To modulate preheating, welding, tempering and other pulses. The pulse width, the interval between the two pulses and the current intensity of each energizing pulse can be adjusted independently. In order to prevent the splash welding pulse at the beginning of welding, it also has current incremental control. Gradually increase the welding current from a small value to a command value.

    In the welding cycle, the electrode pressure has constant pressure, trapezoidal shape, saddle shape, and any adjustable pressure cycle. Some commutator spot welders also have automatic network pressure compensation devices or various types of closed-loop control to ensure stable heat output or welding melting. The nuclear quality is stable. When several spot welding machines are used at the same time, interlocking control or group control can also be carried out. When necessary, only one commutator spot welding machine can be energized and welded at the same time, so as to avoid simultaneous welding to cause network pressure The reduction may even affect the welding quality.