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How to control the degree of spot welding machine
Release time:2022-03-10

How is the control degree of a spot welding machine controlled? The spot welding machine control device has both the functions of welding cycle automation and general current regulation. According to the welding process requirements, the control device can also add some other functions. There are 10 main programs for welding cycles in some point and projection welding machine control boxes in China; There are three electrical pulses: preheating, welding, and tempering. Each pulse also has a pulse modulation modulator with "heating" and "interval" cycles to modulate the preheating, welding, tempering, and other pulses. The pulse width, interval between the two pulses, and current intensity of each electrical pulse can be adjusted separately. In order to prevent splashing welding pulses at the beginning of welding, the welding pulse also has current increment control to gradually increase the welding current from a small value to the command value.

In the welding cycle, there are constant pressure, trapezoidal, saddle shaped, and any adjustable pressure cycles. Some welding machines also have automatic grid voltage compensation devices or various types of closed-loop control to ensure stable output heat or welding nugget quality. When several spot welding machines are used at the same time, interlocking control or group control can also be performed. If necessary, only one spot welding machine can be powered on for welding at the same time, avoiding excessive reduction of grid voltage and affecting welding quality during simultaneous welding.

The working principle of a spot welding machine is to use electrodes to apply electricity to the product being welded. This principle utilizes Joule heating generated by the contact resistance between the electrodes to melt the metal and achieve the purpose of welding. No need to add any solder, high efficiency and low cost. Features such as ease of automation.



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