| 摘要 |
A laser machining apparatus capable of removing spatters and slugs produced in piercing and of increasing supply pressure of blow gas sufficiently without hindering a jet of assist gas 6. A piercing assist jig 10 can be turned and moved up and down by a rotary air cylinder 14 and an extendable air cylinder 15 which are attached to a machining head 1. When piercing is to be performed, the piercing assist jig 10, which is in a position where it does not interfere with the machining nozzle 2 and the workpiece 9, is turned to make a center of a hole 11 of the piercing assist jig 10 coincide with a center of the machining nozzle 2. Then the machining head 1 is moved down to a piercing position, and the piercing assist jig 10 is pressed on the workpiece 9. Then, a laser beam 5 is irradiated and assist gas 6 is jetted, and also blow gas 16 is jetted from a blow gas supply opening 12a, 12b so that the blow gas 16 flows with the assist gas therebetween. Spatters and slugs flying up in the process of piercing are removed by the flow gas 16 without hindering the piercing. <IMAGE> <IMAGE> |
