WELDING JOINT SHAPE FOR ALUMINUM ALLOY DIE-CAST MEMBER AND ALUMINUM ALLOY CAST MEMBER

摘要

PURPOSE:To form the joint without any welding defect by thinning the welding zone of the Al die cast member to be overlapped on the surface of the welding zone of Al alloy cast member toward the tip, by cutting off the tip nearly vertically and by directing an arc for the position slightly apart from the tip. CONSTITUTION:The welding part of the Al alloy die cast member 20 to be joined with welding to Al alloy cast member 1 is made in the following shape: the face 28, etc. inclining to a mating surface 9 are provided and thinned toward the tip; the tip face 27 is formed in the gapping shape about vertically for the mating surface 9 further. A welding wire 31, namely, an arc is welded toward the mating surface 9 with slightly separating from the tip face 27. The thermal capacity of the welding part of the member 20 is thus reduced and the welding part of the die cast member 20 can be welded with less heat gain and penetration even in case of the penetration at the cast member 1 side being made much sufficiently. Accordingly the generation of blow hole is controlled and the welding zone without defect is obtd.