A method of laser machining metallic materials by controlling the transverse power distribution of a laser beam in a working plane, and a machine and a computer program for carrying out said method

Abstract

A method for laser processing of metallic materials by controlling the transverse power distribution of a laser beam (B) in a working plane, as well as machines and computer programs for carrying out said method. A method for laser processing of metallic materials by means of a focused laser beam (B) having a predetermined transverse power distribution on at least one working plane of the metallic material is described, comprising the steps of: providing a laser beam emission source; transporting the laser beam along the beam The optical path is directed to a working head disposed adjacent to the material; collimating the laser beam along a propagating optical axis incident on the material; focusing the collimated laser beam in a region of the working plane of the material; and A working path on a metallic material conducts the focused laser beam, wherein the laser beam is shaped by reflecting the collimated beam by means of a deformable controlled surface reflective element having a plurality of independently movable reflective areas, and by The arrangement of the reflective areas is controlled to establish a predetermined transverse power distribution of the light beam on at least one working plane of the metallic material depending on the area of ​​the current working plane and / or the current direction of the working path on the metallic material.

Description

technical field [0001] The present invention relates to laser processing of metallic materials, and more particularly to laser processing methods for cutting, drilling or welding said materials. [0002] According to other aspects, the invention relates to a machine for laser processing of metallic material arranged to implement a laser processing method, and a computer program comprising one or more code modules for when the program is executed by electronic processing means Used to implement the above methods at execution time. [0003] In the following description and claims, the term "metallic material" is used to define any metal workpiece, such as having an insignificant closed cross-section (such as a hollow circular, rectangular or square form - or an open cross-section - such as a flat cross-section or Sections in the form of L, C, U, etc.) plates or elongated profiles. Background technique [0004] In industrial metalworking methods, and especially in the process...

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Problems solved by technology

[0023] It is widely believed that a physically "unbalanced" system or lack of rotational symmetry at the point of incidence of the laser beam and assist gas on the material leads to complexity and difficulty in controlling the working path, or to a worse quality of the machining results

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