| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for joining a steel band extremely advantageous in welding quality and productivity when producing a steel band used for a tailored blank method by joining steel bands of different kinds. SOLUTION: When continuously welding the edge parts of a plurality of different kinds of steel bands 1, 2, a plurality of steel bands 1, 2 are passed between a welding roll 5 and a plurality of press rolls 3, 4 slantingly arranged so as to apply width direction force to the steel bands, and consequently applying pressing force to the edge part end face of the steel band, a welding position is detected by a position detector 14, and a laser beam emitting tube 6 is moved following the welding position according to the detected value, thus conducting the laser beam welding. |
