US 12,220,766 B2
Method for producing metal structures
Manfred RührnößL, Linz (AT); Markus Schorn, Steinerkirchen (AT); and Herbert Staufer, Neuhofen (AT)
Assigned to Fronius International GmbH, Pettenbach (AT)
Appl. No. 17/277,509
Filed by Fronius International GmbH, Pettenbach (AT)
PCT Filed Sep. 18, 2019, PCT No. PCT/EP2019/074927
§ 371(c)(1), (2) Date Mar. 18, 2021,
PCT Pub. No. WO2020/058298, PCT Pub. Date Mar. 26, 2020.
Claims priority of application No. 18195766 (EP), filed on Sep. 20, 2018.
Prior Publication US 2021/0370442 A1, Dec. 2, 2021
Int. Cl. B23K 26/342 (2014.01); B33Y 10/00 (2015.01); B33Y 30/00 (2015.01)
CPC B23K 26/342 (2015.10) [B33Y 10/00 (2014.12); B33Y 30/00 (2014.12)] 22 Claims
OG exemplary drawing
 
1. A method for automated production of at least one three-dimensional metal structure on a metal base material, comprising:
when a first welding torch is activated, supplying a first metal additive to a welding point on the metal base material the first metal additive being fused at the welding point in a first part of a welding process to produce a first weld seam via at least by a first electric arc produced between a first electrode of the first welding torch and the metal base material, whereby the first weld seam produces a first portion of the three-dimensional metal structure consisting of a material of the first metal additive;
supplying a laser beam to the welding point; and
supplying, via a second welding torch, a second metal additive to the welding point, the second metal additive being fused at the welding point in a second part of the welding process to produce a second weld seam at least by a second electric arc produced between a second electrode of the second welding torch and the metal base material, whereby the second weld seam produces a second portion of the three-dimensional metal structure consisting of a material of the second metal additive,
wherein the first metal additive and the second metal additive are different materials, and
wherein the first metal additive and the second metal additive are supplied to the welding point sequentially in time by switching from the first welding torch, which is deactivated so that no electric arc burns any longer when the first weld seam or part of the three-dimensional metal structure consisting of the material of the first additive has been completed, to the second welding torch, so that the second part of the welding process is continued from the first part of the welding process and the first portion of the three-dimensional metal structure and the second portion of the three-dimensional metal structure are fused in a region of the welding point to form the three-dimensional metal structure.