| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain an excellent welding quality without deteriorating a welding velocity. SOLUTION: In this device, a cutting light condensed beam, wherein the cutting laser beams outputted from a cutting laser oscillator 13 are condensed, is radiated to end parts of one metallic plate and the other metallic plate nipped between first and second clamp parts 1 and 2 while a cut welding torch 20 is moved so as to cut the metallic plates. The second clamp part 2 is moved on the first clamp 1 side, so as to butt end faces of the metallic plates after cutting. A welding light condensed beam, wherein the welding laser beams outputted from a welding laser oscillator 14 are condensed, is radiated to the butt part of the metallic plates while the cut welding torch 20 is moved, so as to perform welding. At that time, while the light condensed beam, wherein the cutting laser beams are condensed, is radiated to the butt part for pre- heating, the welding light condensed beam is radiated for performing welding.</p> |
