METHOD FOR BUTT WELDING OF SHEETS OF DIFFERENT THICKNESS

摘要

PURPOSE:To provide an excellent weld joint with high efficiency without executing the machining to the end surface to be welded of a sheet or using a filler wire in executing the butt welding of the sheets of different thickness by a high density energy heat source such as the laser beam and the electron beam. CONSTITUTION:Sheets 1 and 2 are irradiated with the high density energy heat source 3 such as the laser beam and the electron beam by setting the irradiation angle theta relative to the butt surfaces 1a, 2a of both sheets 1 and 2 by 10-45 deg. toward the thicker sheet 1.