| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a laser processing method for protecting turning-up of an edge portion of a protection sheet that is cut and left on a processed work during a cutting processing. SOLUTION: A laser bam L is irradiated to a processed work 3 while gas is injected toward the processed work 3 through both of a gas passages 6 and 7 so that processed work 3 can be cut at a predetermined profile. Further, the processed work 3 is supported on a non-illustrated worktable so that a side of a protection sheet 5 on the processed work is in an upside position. Pressure of gas in a second gas passage 7 during a cutting processing is higher than the pressure of gas in a first gas passage 6. During a cutting processing, edge portions 5A, 5A of the protection sheet 5 at a cut place 3A is strongly pushed toward a base material 4 by gas of the second gas passage 7.</p> |
