WELDING METHOD FOR CAN STOCK

摘要: PURPOSE:To perform the electric resistance welding of various stocks for can starting with a tin free steel by irradiating laser beam on surface overlapping part zone in advance prior to welding. CONSTITUTION:The is performed whole or one sheet-steel sheet contact faces, 6, 7 and sheet-welding electrode faces 5, 8 case stock like tin-free coating an extremely thin chrome plating surface. By this irradiation, oxide layer 1 metallic 2 are completely removed evaporation alloyed material yet produced ultrafine powder removed. The including which was regarded as impossible past therefore be easily.