| 摘要 |
PURPOSE:To concentrate and supply assist gas uniformly on the irradiation face of laser beam by providing a ring-shaped nozzle around the laser beam and blowing inert gas onto the spot of laser beam irradiation from the ring-shaped nozzle. CONSTITUTION:The laser beam 1 is reflected by a condenser 2 and condensed upon the material to be welded 5 to weld the material. At this time, assist gas (inert gas) is blown onto the position of laser beam irradiation from a ring-shaped Nozzle 3A that surrounds the laser beam 1. It is desirable to make the blown gas to a rotating current. |
