| 摘要 |
A laser-machining device ( 1 ) for machining a workpiece (W) by radiating it with the laser beam output from a nozzle ( 42 ) of a laser oscillator ( 31 ) is disclosed. A gap amount sensor ( 43 ) detects the gap amount between the workpiece and the nozzle. An approach unit ( 12, 41 ) causes the nozzle to approach the workpiece to a position suitable for the laser machining. The approach unit performs a first approach operation ( 12 a) for making the nozzle approach the workpiece using the gap amount detected by the gap amount sensor until the gap amount comes to assume a predetermined value, and a second approach operation ( 12 b), after the first approach operation, for causing the nozzle to approach the workpiece until the complete approach without using the gap amount detected by the gap amount sensor. As a result, the required time is shorter and a stable piercing process can be executed.
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