| 摘要 |
<p>PROBLEM TO BE SOLVED: To weld two aluminum alloy members at a high speed and to prevent the occurrence of defective welding by arranging a filler metal in a thin plate side of the butting parts of end surfaces to each other in the two aluminum alloy members having different thicknesses and welding by irradiating this filler metal with a laser beam. SOLUTION: The end surfaces of two aluminum alloy members of a thick plate 3 and a thin plate 4 are butted to each other and a filler metal 2 is arranged in the butting part on the aluminum alloy member 4 at the thin plate side. At the time of irradiating this filler metal 2 with a laser beam 1, the filler metal 2 is melted, a melt-starting part of the filler metal 2 is formed just after starting the irradiation of the laser beam 1 and the welding is progressed. By this method, a welded metal part without generating deflective welding, is formed. That is, at the time of welding, in the case of making the thin plate side member 4 an aiming position while irradiating the filler metal 2 with the laser beam 1, the filler metal is added while keeping the welding condition at a low heat inputting side in the thin plate side and the formation of a molten metal can be accelerated.</p> |
