METHOD FOR JOINING CONTACT POINT MATERIAL

摘要

PURPOSE:To increase the joining area even if special working is not performed on a metal plate and to perform welding with little thermal effect by irradiating a joining part annularly with an electron beam or a laser beam. CONSTITUTION:The metal plate 2 is irradiated with the laser beam 3 which is formed into the annular mode from the rear side so as not to damage a contact point material 1. By this method, the laser beam 3 is absorbed annularly on the surface of the metal plate which is molten up to the central part by thermal conduction and integrated with a contact point and welding with little thermal effect is performed.