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The Working Principle Of Spot Welder
Apr 09, 2018

The process of spot welding is to open cooling water; Clean the surface of the welding parts. After the assembly is accurate, it is sent to the upper and lower electrodes to exert pressure to make it contact well. The contact surface of the two workpieces is heated by the electricity, and the fusion core is formed. Maintain pressure after power failure, so that the molten core can be cooled and solidified under pressure to form solder joints. Remove the pressure and remove the workpiece. Welding current, electrode pressure, electric time and surface dimension of electrode working surface have great influence on welding quality.

The spot welder USES the high temperature arc generated by the positive and negative electrodes to melt the welding materials between electrodes to achieve the purpose of binding them. The structure of spot welder is very simple. It is said that a large power transformer will turn 220V alternating current into low voltage, and the power supply of large current can be dc or ac. The electric welding transformer has its own characteristics, which is characterized by a sharp drop in voltage.

In the electrode voltage drop after ignition, the regulation of the working voltage of electric welding machine, in addition to 220/380 of a voltage transformation, secondary coil also have tap changing voltage, as well as with iron core to adjust, adjustable iron core. An electric welding machine is generally a large power transformer, which is made from the principle of inductance. When the inductance is switched on and off, a large voltage change will be generated. The welding material on the electrode will be melted by the high voltage arc generated by the positive and negative polarity in the instantaneous short circuit. To achieve the purpose of binding them.