SPOT WELDING OF COMPOSITE DAMPING STEEL PLATE

摘要

PURPOSE:To shorten the preheating time and to make the welding quality a stabilized good one by spot-welding the compound type damping steel plate pinching a conductive resin layer with the spherical press electrode chip having its tip radius which is less than the specified magnification of the thickness of the damping steel plate. CONSTITUTION:A compound type damping steel plate 1 pinching a conductive resin layer 1c is put on a base plate 2 and a spot welding is performed with pressing from the side (a) of the damping plate 1 by the spherical press electrode chip 3 having the radius R of its tip of less than 80 times approx. of the damping plate 1a. In this case the electrifying preheating time becomes less than 20% of the electrifying time of all spot weldings and the variation is eliminated in the welding quality and a stabilized good joint is made.