SOURCES OF ACOUSTIC EMISSION IN RESISTANCE SPOT WELDING

Acoustic emission is an outlet parameter which provides some information about the process of resistance spot welding, as well as about the quality of the weld spot. The information gained from acoustic emission can strongly support or reject conclusions about weld quality by simply monitoring a single physical property. In this paper we describe the basic characteristics principles of acoustic emission, and an approach to monitoring the characteristic phases of the resistance spot welding process. Alternative useful applications of the acoustic emission signal are mentioned.