| 摘要 |
PROBLEM TO BE SOLVED: To enlarge the welded broadening on the welded end sides by correction, when the lapped parts of the ends of an antecedent plate and a following plate are welded. SOLUTION: If the progression of an inlet clamp 5 is 100 mm, the distance between a lower stopper part 43, which moves with the clamp 5, and a stopper piece 55 fixed on a base 33 is set at 100 mm. The distance between an upper stopper part 43 and a stopper piece 56 is set at 100 mm+α. When the inlet clamp 5 advances, the lower stopper part 43 firstly comes into contact with the stopper piece 55. At this point, there still exists a gap ofαbetween the upper stopper part 43 and the stopper piece 56. When an upper cylinder 41 is driven further, the stopper piece 56 comes into contact with the stopper part 43, which advances the welded end of the following plate 3 by 1 mm and enlarges the lapped parts on the welded end sides. |
