Patent ID: 7566844
Filing Date: 2009-07-28
Classification: B23K

Abstract:
1. A laser-machining device, for machining a workpiece by radiating the workpiece with the laser beam output from the nozzle of a laser oscillator, comprising: a gap amount sensor for detecting the gap amount between the workpiece and the nozzle; and an approaching means for causing the nozzle to approach toward the workpiece to a position suitable for laser machining; wherein the approaching means performs a first approach operation in which the nozzle approaches the workpiece using the gap amount detected by the gap amount sensor until the gap amount reaches a predetermined value, and a second approach operation in which, after the first approach operation, the nozzle approaches the workpiece until the completion of the approach without using the gap amount detected by the gap amount sensor; the laser beam is radiated on the workpiece while starting the second approach operation.