| 摘要 |
PROBLEM TO BE SOLVED: To solve a problem that in a processing device for injecting a water jet to a processing target and emitting a laser beam by using a stream of the water jet as a light guiding material to perform cutting, when cutting depth becomes long to some extent, the laser beam attenuates until reaching a processing point, causing limitation on cutting possible depth.SOLUTION: A stream is injected to form a first diameter on a processing target and cutting is performed. Subsequently, the stream is injected to form a second diameter (smaller than the first diameter) on the processed object and cutting is performed. This can suppress absorption of laser beam in a cut part side face. |
