| 摘要 |
A transmissive resin member and an absorptive resin member having lower optical transmittance than the transmissive resin member are superimposed together to form a superimposed part. Laser irradiation is performed from the side of the transmissive resin member while moving the irradiation position with respect to the superimposed part, and a noncombustible gas is blown onto the irradiation position from the side of the transmissive resin member in accordance with the movement of the laser light irradiation position. This laser welding method is particularly suited for manufacturing a resinous impeller for an air blower. A laser welding apparatus for the laser welding method includes a laser irradiation lens unit configured to irradiate resin members with laser light while an irradiation position is moved, and a discharge nozzle mounted on the laser irradiation lens unit and configured to blow a noncombustible gas toward the moving irradiation position. |
