| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a laser beam machining method for executing the laser beam machining with a protective sheet being affixed to a surface of a material, the method which is capable of preventing the surface of the material from being damaged, and of suppressing any peeling and turning-up of the protective sheet. <P>SOLUTION: In the laser beam machining method, a plate-like metal material with a protective sheet being affixed to a surface thereof is irradiated with laser beam while blowing assist gas to conduct cutting, boring or other machining. A nozzle opening diameter is set to satisfy the inequality D/G≥2, where G[mm] denotes the melting width of the protective sheet, and D[mm] denotes the nozzle opening diameter. The plate-like metal material and the protective sheet are machined with one time of laser beam irradiation. <P>COPYRIGHT: (C)2012,JPO&INPIT |
