Electric resistance welding

Spot welding or electric resistance spot welding is lap welding by melting two parts clamped between two electrodes, through which electric current is supplied. The resulting weld has the shape of a point, and its cross-section is in the shape of a lens. High-quality electric resistance welding machines, intended for a specific welding procedure, have built-in high-quality devices for guiding and controlling the welding process. In the event that the method and type of welding is changed on a particular machine, care should be taken to select a good selection of new welding parameters.