| 摘要 |
PROBLEM TO BE SOLVED: To provide a laser cutting method and a laser cutting apparatus which perform laser cutting on a planar workpiece. SOLUTION: In the laser cutting method and the laser cutting apparatus, prior to laser cutting of a planar workpiece W, a plurality of times of piercing are performed in which the approaching positions of a condenser lens 5 to the workpiece are variously changed and the focal positions to the workpiece are variously changed, and a focal position is held and the workpiece is subjected to laser cutting, the focal position giving the minimum value to the detected value of the quantity of scattered light detected upon the piercing for a plurality of times. COPYRIGHT: (C)2012,JPO&INPIT |
