METHOD OF MATERIAL PROCESSING USING A LASER BEAM

摘要

An output beam from a laser, for example an Nd-YAG laser, is directed on to a workpiece, for example steel sheet. In order to perform a material processing operation, eg cutting, drilling, milling or welding one or more laser beam pulses are applied to the workpiece. Each pulse is divided into n sub-pulses having power amplitudes A1, A2, ... An and durations t1, t2, ... tn. The sub-pulses are separated by intervals having amplitudes B1, B2... Bn-1 and duration T1, T2, ... Tn-1. The invention may be achieved when the following conditions are observed: (B1/A1), (B2/A2),...(Bn-1/An-1)