Resistance spot welding is a resistance pressure welding process for welding primarily sheet metal parts of different dimensions and materials.
Resistance spot welding belongs to the group of pressure welding processes using electricity as the energy source.
The principle is that current is supplied to the parts to be welded via electrodes and under the effect of force.
The resistance heating process heats the mating parts until the required welding temperature is reached. The parts are spot-welded at their point of contact between the electrodes under the effect of an electrode force.
In a relatively short period of time, the thermal energy is concentrated on a small area of the workpieces, creating an inseparable bond under the effect of pressure.