WELDING METHOD OF WELDED JOINT

摘要

PURPOSE:To improve reliability to resistance to fatigue by determining the aiming position of a torch nozzle and torch angle toward the joint of two members each consisting of an Al alloy, oscillating the torch around the same and controlling the coefft. of stress concn. at the toe of weld at a specific value or below. CONSTITUTION:The aiming position of a torch nozzle and torch angle are determined toward two members each consisting of an Al member and the torch is oscillated around the same and at the same time welding is performed by controlling the coefft. Kt of stress concn. at the toe of weld to <=3 with a method for welding said members. For example, the number of oscillation is made 150- 250 times/min and the oscillating width + or -4mm. or >=50% gaseous helium is mixed with the shielding gas of the torch nozzle and the coefft. Kt is made <=3.