| 摘要 |
PURPOSE:To suppress the occurrence of shrinkage and deposit of molten material on a welding starting end and a welding finishing end and to enhance the extensional flange formability. CONSTITUTION:A butt gap S of steel sheets 11 and 12 is set within a specified value, the distance P1 between the irradiation starting position of a laser beam L and the welding starting side end faces of the steel sheets is set above a specified value, the distance P2 between the irradiation finishing position of the laser beam L and the welding finishing side end faces of the steel sheets is set above a specified value, the deviation between the irradiation starting time of the laser beam L and the supply starting time of a filler wire 13 is set in a specified range and the deviation between the irradiation finishing time of the laser beam L and the supply finishing time of the filler wire 13 is set in a specified range. |
