| 摘要 |
PURPOSE:To prevent such a state that spatters spattered from a part to be worked irradiated with a laser light beam by a condenser lens adhere onto protective glass arranged between the condenser lens and part to be worked. CONSTITUTION:The torch is provided with a condenser lens 20 for radiating a light beam converged on a part 30 to be worked, a gas feeding-out means 23 for supplying inert gas to the part 30 to be worked from an ejection port 23b opened toward the relative moving direction of the part 30 to be worked with respect to the condensing lens 20, and an air feeding-out means 22 for ejecting air for forming an air curtain between the part 30 to be worked and the condenser lens 20 form an ejection port 22b opened toward the direction inclined to an optical axis of the laser light beam allowed to irradiate the part 30 to be worked. |
