| 摘要 |
<p>PROBLEM TO BE SOLVED: To sufficiently secure welding depth and range. SOLUTION: In a laser beam welding device 10 equipped with a laser outputting structure 1 to emit welding laser beam and having a fixed locaion of a focus F to which welding laser beam A is condensed in the forward direction of laser emission, plural injection nozzles 2 are provided to blow out shielding gas C toward the work to prevent oxidation of the welded work B and at the same time the injection nozzles 2 are each arranged at an equal angular distance on the same circumference H taking the emitted welding laser beam A as the center axis.</p> |
