If you are planning to weld various sheet metals, spot welding would be the easiest method to accomplish your task. The spot welders are exclusively used for welding sheet metals which are typically in a thickness range of 0.5-3.0 mm. The welding process make use of two copper alloy welding electrodes which concentrates the welding current into a small ‘spot’ and also holds the metal sheets together. A small chunk of metal is formed as the current passes through the spot due to instant melting of the metal.  This completes the welding process. One of the main advantages of spot welders is that a large amount of energy is delivered at the spot in a very short time. This initiates quick welding without excessively heating the rest of the sheet.

The spot welding technology can be efficiently used for welding many sheet metal goods like metal pails. It is also possible to use spot welders for welding aluminum alloys. But while spot welding aluminum, the welding current required should be three times higher owing to the higher thermal conductivity and electrical conductivity of the metal.

You can find that the spot welders are utilized universally for welding the sheet metal forming a car. Thus the automobile industry gets the major benefits of spot welding. Yet another advantage of spot welders is that it can be completely automated and many industrial robots are actually spot welders.