| 摘要 |
PROBLEM TO BE SOLVED: To provide a twin beam processing method which can surely obtain the deep penetration as the particularity of a laser beam welding by dividing the laser beam and can efficiently fill up into a beveling by melting a welding wire. SOLUTION: A lens 10 for dividing into axial symmetrical condensing lens system 3 to an optical axis is inserted from the side part toward the optical axis direction and the laser beam is introduced to the condensing lens system 3 and a welding spot A is condensed on the work 14 and also, the laser beam is divided with the lens 10 for dividing and a preliminary spot C is condensed on the work 14. On the other hand, the deepest part of the beveling part on the work 14 is melted with the welding spot A by supplying the welding wire 11 onto the preliminary spot C and also, the welding wire 11 is welded with the preliminary spot C and filled up into the beveling part on the work 14. |
