| 摘要 |
PURPOSE:To provide a laser beam welding method where the allowable butt clearance during the welding can be increased, and the stable and higly qualified welding can be executed in the butt welding of a preceding sheet-shaped member to be welded with a succeeding member to be welded. CONSTITUTION:In the laser beam welding method where the laser beam is converged along the butt part having a small gap G between the rear end of a preceding sheet-shaped member 12 to be welded and the forward end of the succeeding member 13 to be welded to weld the but part, either of the members to be welded is melted by the laser beam at the weld starting end 17 of the butt part, and after the small gap G is reduced, the butt part is welded. |
