| 摘要 |
PROBLEM TO BE SOLVED: To prevent the scale from being included in a welded part by bringing clamping devices close to each other, butting and pressing end faces after cutting stocks and pressing them against each other to float the scales on the end faces of both stocks, removing the scales, and welding the stocks to surely perform the copying control of the welding line. SOLUTION: Scales 5 on the surface are closely attached before a succeeding rolled stock 1 is butted to a preceding rolled stock 2, but when they are butted and pressed against each other, the scales 5 are cracked and floated to cover the welding line 6. The floated scales are removed by blowing the air by an air blow header 7. The laser beam welding is performed by moving a laser beam torch 8 along the welding line 6. During the welding, the scales 5 on the welding line 6 and in the vicinity thereof are removed, and the welding line 6 is detected through the image processing by a CCD camera, etc., and the copying control of the laser beam torch 8 is performed to achieve the stable laser beam welding. |
