| 摘要 |
PURPOSE:To cross the barrel and a cover plate of a drum can at right angles by eliminating a wedge-shaped gap generated on the inside corner between the bent base of the side periphery of the drum barrel and the drum cover plate. CONSTITUTION:The inside corner 5 between the bent base 6 of the side periphery 3 of the drum barrel 1 and the drum cover plate 2 is irradiated with a laser beam 8 from a laser beam welding machine 9 from the outside of the drum, cladding 10 by welding is formed on the wedge-shaped gap and simultaneously, cladding by welding is performed by an electrode 11 on the outside of the drum barrel 1. |
