| 摘要 |
PURPOSE:To improve optical axis adjusting accuracy at the time of welding by providing a rotary table to mount a laser beam splitting part, fiber optical parts and laser beam emitting optical parts at the positions in opposition. CONSTITUTION:The laser beam welding machine is provided with the rotary table part 9 which mounts the laser beam splitting part 2 to split a laser beam, the fiber optical parts 3a and 3b to lead the laser beam to machining points in opposition on workpieces 5a and 5b and the laser beam emitting optical parts 4a and 4b and rotates around the workpieces 5a and 5b. An optical axis of the workpieces 5a and 5b held by collect chucks 6a and 6b is adjusted by a Z stage and an X-Y stage 8. The laser beam is split equally and emitted from the laser beam emitting optical parts to the machining points. The laser beam emitting optical parts move to the optional positions around the workpieces by the rotary table 9 while maintaining the positions in opposition mutually to perform spot welding. After spot welding, the laser beam emitting optical parts make a half-round around the workpieces to perform seam welding. By this method, thermal strain is offset and optical axis adjusting accuracy can be improved. |
