Spot welding

Spot welding


Spot welding is a type of resistance welding used to weld thin pieces of ferrous metal. It uses two large electrodes which are placed on either side of the surface to be welded, and passes a large electrical current through them that heats up the metal in-between. The result is a small "spot" that is quickly heated to the melting point, forming a small dot of welded metal. Applying the current for too long can burn a hole right through the material.