Method of laser processing of a metallic material with high dynamic control of the movement axes of the laser beam along a predetermined processing path, as well as a machine and a computer program for the implementation of said method

A method of laser processing of a metallic material, in particular for laser cutting, drilling or welding of said material, by means of a focused laser beam having a predetermined transverse power distribution at at least one working plane of the metallic material, comprising the steps of:

• providing a laser beam emitting source;
• leading the laser beam emitted by said emitting source along a beam transport optical path to a working head arranged in proximity of said metallic material;
• collimating the laser beam along an optical axis of propagation incident on the metallic material;
• focusing said collimated laser beam in an area of a working plane of said metallic material;
• and
• conducting said focused laser beam along a working path on the metallic material comprising a succession of working areas,
• wherein the method comprises shaping the laser beam, wherein shaping the laser beam comprises:
• reflecting said collimated beam by means of a deformable, controlled surface reflecting element having a reflecting surface with a continuous curvature including a plurality of independently movable reflection areas, and
• controlling the arrangement of said reflection areas to establish a predetermined transverse power distribution of the beam at at least one working plane of the metallic material as a function of the area of the current working plane and/or the current direction of the working path on the metallic material.