| 摘要 |
PROBLEM TO BE SOLVED: To uniformly supply a filler material, which is added for improving welding quality of a seam part with laser beam welding, without lowering a welding speed. SOLUTION: A steel strip 1 continuously transferred is formed to a cylindrical shape, a foil or wire filler material is inserted from the open side of a V shaped converging point of steel strip edge parts 1a, 1b. The steel strip edge parts 1a, 1b and filler material 2 are pressurized and butted by squeeze rolls 3a, 3b, while continuously supplying the filler material between the butted parts 4, the butted parts 4 are irradiated with a laser beam 5 and welded. |
