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1. (WO2018196927) METHOD FOR MONITORED LASER CUTTING FOR METAL WORKPIECES

Pub. No.:    WO/2018/196927    International Application No.:    PCT/DE2018/100408
Publication Date: Fri Nov 02 00:59:59 CET 2018 International Filing Date: Fri Apr 27 01:59:59 CEST 2018
IPC: B23K 26/03
B23K 26/38
Applicants: JENOPTIK AUTOMATISIERUNGSTECHNIK GMBH
Inventors: LANGEBACH, Jan
SCHMIEDER, Frank
DOERING, Christian
Title: METHOD FOR MONITORED LASER CUTTING FOR METAL WORKPIECES
Abstract:
The invention relates to a method for the monitored cutting of a slug (2) out of a metal workpiece (1), in which a machining laser beam (3) is directed onto a workpiece surface (1.1) of the workpiece (1) and is guided along an actual cut contour (4), which deviates from a desired cut contour by limited tolerances, and a separating cut (5) is formed in the workpiece (1). After complete guiding along the actual cut contour (4), the machining laser beam (3) is guided along a run-out path (4.1) that extends into the inside of the actual cut contour (4). The intensity (I), detected during the method, of a reflected radiation component of the machining laser beam (3) falls discontinuously with a defined step size (hd) when the slug (2) has fallen out of the workpiece (1).