| 摘要 |
PURPOSE:To set a butt gap with high accuracy by inserting shims having thickness corresponding to the butt gap quantity into the shear-cut surfaces of materials to be welded. CONSTITUTION:In butt laser beam welding where a couple of metallic sheets 1 and 2 to be welded are subjected to butt welding with the specified gap quantity S, the metallic sheets 1 and 2 to be welded are shear-cut, then, the shims 5 having thickness corresponding to the gap quantity S are inserted into the shear-cut surfaces of both sheets in the vicinity of both ends thereof, both metallic sheets are abutted on each other via the shims 5 and then, subjected to laser beam welding. After welding, the remaining sheet ends of the shims are then cut and removed. Consequently, the butt gap quantity can be obtained with high accuracy. |
