| 摘要 |
PURPOSE:To execute laser beam processing with high accuracy and high grade by executing said processing while ejecting a cooling gas at a high speed to the part to be worked thereby decreasing the thermally deformed layer in the cutting part and maintaining a min. cutting width. CONSTITUTION:The laser beam emitted from a laser oscillator 2 is focused by a lens 3, is reflected by a reflecting mirror 6 and is irradiated through a partition member 7 onto the work 9. The focal position thereof is adjusted by driving a motor 5 and laterally moving a focusing barrel 4. The cooling gas is introduced from a cooling gas supply pipe 8. The introduced cooling gas is ejected through the flow passage between a housing 1 and the member 7 toward the part to be processed from a nozzle at the top end of the housing. The nozzle is so constituted that the central axis thereof is alighted to the central axis of the member 7, by which the ejected gas is evenly blown to the periphery around the position of the work 9 where the laser beam is irradiated. |
