| 摘要 |
<p>PROBLEM TO BE SOLVED: To enable the welding of a narrow part, to reduce the running cost, to prevent the oxidation and burning of a back side of a product, and to improve the welding quality by applying and drying an antioxidant for heat treatment to a part to be welded of a work surface, and irradiating the laser beam thereupon to effect the welding. SOLUTION: An antioxidant supplying and applying device 13 for heat treatment is lowered to an application position by a cylinder 17, a laser beam machining head 19 is moved by a welding program, and an antioxidant is applied to a work W by the antioxidant supplying and applying device 13. After the antioxidant is dried, the antioxidant supplying and applying device 13 is retracted and elevated by the cylinder to effect the welding weight applying any shield gas. The antioxidant on the work W is wiped with a cloth containing water. Since there is nothing between a collective lens unit 21 and the work W, the welding of a narrow part of a product can be effected. Since no nozzle is present, the welding can be effected with the laser beam machining head 19 at an optimum angle.</p> |
