| 摘要 |
PURPOSE: To simplify work by traveling the position of bottom part of machining nozzle of a laser bean machining torch of a laser beam machine along the center axis and piercing the nozzle hole larger than the diameter at bottom face part of condensed laser beam CONSTITUTION: The torch 9 is provided with a condensing lens 6 to condense a laser beam 2 outputted from a laser oscillator 1 and when an object to be machined 20 is irradiated with a condensed laser beam 7 condensed by a condensing lens 6, a passing mouth to irradiate with laser beam and inject assist gas is pierced to a machining nozzle 18 by the condensed laser beam itself and then laser machining is started. In this laser beam machining torch 9, a machining nozzle 18 is made of compression forming, a shape of a bottom part 29 of torch 9 is deformed in X direction of the center axis 4 of machining nozzle 18 by the pressure of injecting gas. |
