HIGH-POWER-DENSITY BEAM WELDING METHOD IN COMBINATION WITH UPSET WELDING AND APPARATUS THEREFOR

摘要

Method and apparatus for high-power-density beam welding in combination with upset welding. The method comprises forming along abutting edges of metal materials to be welded a continuous weld line for high-power-density beam welding by using an upset welding, and welding the metal materials by irradiation of a high-power-density beam along the weld line with an output of the high-power-density beam determined on the basis of an input heat produced by resistance exothermal reaction in the metal materials during the upset welding as well as a welding pressure given to the metal materials.