| 摘要 |
PURPOSE:To execute the welding performance of a high quality by which no irregurarily exists on a welding bead and no blowhole is left in the inside by inserting an insert member containing no low boiling point element into a weld part of a high strength Al alloy member, irradiating it with a laser beam and executing the welding. CONSTITUTION:As for welding object members 1, 2, for instance, a high strength Al alloy consisting of an Al - Mg compound alloy is used. In this state, for instance, an insert 3 consisting of industrial pure Al containing no low boiling point element is inserted as a weld joint into a weld part of the members 1, 2. A laser beam 4 is emitted through a window 6 from an oscillator 5, reduced to necessary power density by a condensing lens 7, and radiated to the insert material 3. Simultaneously, from a gas leading-in port 8, insert gas such as argon gas, etc., is led in as shield gas. While radiating the laser beam, the whole members 1, 2 are moved by a moving table and a welding work is executed continuously, and desired welding is attained. |
