SPOT WELDING METHOD, AND ELECTRODE FOR SPOT WELDING

摘要

PROBLEM TO BE SOLVED: To provide a method for determining the quality of the spot welding by a non-destructive inspection. SOLUTION: An electrode having a recess in which the depth of a weld trace formed on a surface of a metal body and reaching a deepest part is set to be a predetermined value when an electrode surface is a substantially projecting curved surface and a nugget is excellently formed in a center of an electrode surface by the spot welding is used for at least one electrode to perform the spot welding. The quality of the spot welding is determined based on the shape of the weld trace formed on the surface of the metal body corresponding to the recess by the spot welding. COPYRIGHT: (C)2007,JPO&INPIT