MANUFACTURE OF LASER BEAM WELDED MEMBER

摘要

PURPOSE:To prevent a large recessed part and a through hole from being generated by irradiating a flange part in the vicinity of the bend of a mating work with a high density energy beam from the frange part of a work and welding both flange parts. CONSTITUTION:A laser beam torch 9 is arranged on the position in opposition to the seat surface 13b of the flange part 13a. The flange part 13a in the vicinity of the bend 14b of the flange part 14a is irradiated with the laser beam from the laser beam torch 9. Since the upper surface of the flange part 13a is flat, the melting quantity of metal is little as compared with the case when it is bent and spraying of assisting gas is carried out uniformly for the face of weld. Consequently, the inflow of molten metal into a gap between the flange parts 13a and 14a is reduced and the large recessed part and the through hole are not generated on a based 18 generated by welding.