STRUCTURE FOR BONDING METAL PARTS TO EACH OTHER AND BONDING METHOD THEREFOR

摘要

A flange (24) is provided on the perimeter of a metal cap (21). A wire (25) is formed in a ring shape and disposed on the lower surface of the flange (24). Preferably, the wire (25) is tack-welded to the lower surface of the flange (24). The wire (25) used has a melting point in the range of -150°C to +150°C with respect to the melting points of the metal cap (21) and the metal base (22). The flange (24) of the metal cap (21) is placed on the metal base (22) with the wire (25) interposed therebetween. Then, an electric current is passed between the flange (24) of the metal cap (21) and the metal base (22) to melt the wire (25) and resistance-weld the flange (24) to the metal base (22).