Laser machining system and laser machining method

Patent metadata

Field	Value
Publication number	US-2019143458-A1
Application number	US-201816184598-A
Country	US
Kind code	A1
Filing date	Nov 8, 2018
Priority date	Nov 15, 2017
Publication date	May 16, 2019
Grant date	—

Abstract

The invention pertains to a laser machining system that comprises first deflection optics, which are designed for deflecting a machining laser beam in two directions in space, second deflection optics, which are designed for deflecting a measuring beam in two directions in space independently of the machining laser beam, and a coupling device, which is arranged in a beam path of the machining laser beam and designed for coupling the measuring beam into the beam path of the machining laser beam.

First claim

1 . A laser machining system, comprising:
first deflection optics, which are designed for deflecting a machining laser beam in two directions in space; second deflection optics, which are designed for deflecting a measuring beam in two directions in space independently of the machining laser beam; and a coupling device, which is arranged in a beam path of the machining laser beam and designed for coupling the measuring beam into the beam path of the machining laser beam.

2 . The laser machining system according to claim 1 , wherein the first deflection optics comprise two independent first deflection mirrors.

3 . The laser machining system according to claim 1 , wherein the first deflection optics are designed for a two-dimensional oscillation of the machining laser beam.

4 . The laser machining system according to claim 1 , wherein the second deflection optics comprise two independent second deflection mirrors.

5 . The laser machining system according to claim 1 , wherein the second deflection optics are designed for a linear or circular motion of the measuring beam.

6 . The laser machining system according to claim 1 , wherein the second deflection optics are designed for deflecting the measuring beam on at least one workpiece independently of an advance direction of the machining laser beam.

7 . The laser machining system according to claim 1 , wherein the coupling device is a beam splitter.

8 . The laser machining system according to claim 1 , wherein the coupling device is designed for superimposing the machining laser beam and the measuring beam coaxially.

9 . The laser machining system according to claim 1 , furthermore comprising an evaluation unit that is designed for determining a seam progression on a workpiece with the measuring beam.

10 . The laser machining system according to claim 9 , furthermore comprising a control unit that is designed for controlling the first deflection device in such a way that the machining laser beam tracks a seam progression on the workpiece.

11 . The laser machining system according to claim 10 , wherein the evaluation unit comprises an optical coherence interferometer.

12 . A laser machining method, comprising:
deflecting a machining laser beam in two directions in space such that the machining laser beam carries out a two-dimensional motion on at least one workpiece; deflecting a measuring beam in two directions in space independently of the machining laser beam; and coupling the measuring beam into the beam path of the machining laser beam.

13 . The method according to claim 12 , wherein the machining laser beam carries out an oscillating motion.

14 . The method according to claim 12 , wherein the measuring beam carries out a linear or circular motion.

15 . The method according to claim 12 , furthermore comprising:
determining a seam progression with the measuring beam by means of optical coherence tomography; and tracking the seam progression by means of the machining laser beam based on the determined seam progression.

Assignees

• Precitec Gmbh & Co Kg

Inventors

• Strebel Matthias

Classifications

• B23K26/28

  of curved planar seams · CPC title

• B23K26/0652

  comprising prisms · CPC title

• B23K26/067

  Dividing the beam into multiple beams, e.g. multi-focusing · CPC title

• B23K31/125 Primary

  Weld quality monitoring · CPC title

• B23K26/0643

  comprising mirrors · CPC title