Abstract
Resistance welding is a process in which the main source of heat is the electric current flowing through the welding region. The result of the flow of current is the resistance heating of the area of contact between the elements to be welded. This results in either strong plasticisation or liquidity. If the upsetting pressure, exerted both during the flow of current and afterwards, is sufficiently high, a permanent joint between the welded elements will be made.7 The magnitude of the pressure should be sufficient to allow the flow of a high current of, possibly, several thousand amperes. Although the process of resistance welding has been known for over 125 years, it is still being improved.
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