A METHOD OF LASER PROCESSING OF A METALLIC MATERIAL WITH CONTROL OF THE TRANSVERSE POWER DISTRIBUTION OF THE LASER BEAM IN A WORKING PLANE, AND A MACHINE AND COMPUTER PROGRAM FOR THE IMPLEMENTATION OF SAID METHOD

摘要

A method of laser processing of a metallic material with control of the transverse power distribution of the laser beam (B) in a working plane, and a machine and computer program for the implementation of said method A method of laser processing of a metallic material is described, by means of a focused laser beam (B) having a predetermined transverse power distribution on at least one working plane of the metallic material, comprising the steps of: • - providing a laser beam emitting source; • - leading the laser beam along a beam transport optical path to a working head arranged in proximity to the material; • - collimating the laser beam along an optical axis of propagation incident on the material; • - focusing the collimated laser beam in an area of a working plane of the material; and • - conducting said focused laser beam along a working path on the metallic material comprising a succession of working areas, wherein the laser beam is shaped: • - by reflecting the collimated beam by means of a deformable controlled surface reflecting element having a plurality of independently movable reflection areas, and • - by controlling the arrangement of the reflection areas to establish a predetermined transverse power distribution of the beam on at least one working plane of the metallic material as a function of the area of the current working plane and/or of the current direction of the working path on the metallic material.