US 12,275,087 B2
Method for welding sheets with coatings comprising an alloy of aluminum and silicon
Tim Hesse, Ditzingen (DE); and Nicolai Speker, Pleidelsheim (DE)
Assigned to TRUMPF LASER- UND SYSTEMTECHNIK GMBH, Ditzingen (DE)
Filed by TRUMPF Laser- und Systemtechnik GmbH, Ditzingen (DE)
Filed on Jun. 12, 2024, as Appl. No. 18/741,573.
Application 18/741,573 is a continuation of application No. PCT/EP2022/084804, filed on Dec. 7, 2022.
Claims priority of application No. 10 2021 133 684.8 (DE), filed on Dec. 17, 2021; and application No. 10 2022 121 052.9 (DE), filed on Aug. 19, 2022.
Prior Publication US 2024/0367265 A1, Nov. 7, 2024
Int. Cl. B23K 26/32 (2014.01); B23K 26/06 (2014.01); B23K 26/062 (2014.01); B23K 26/073 (2006.01); B23K 26/08 (2014.01); B23K 26/244 (2014.01); B23K 26/322 (2014.01); B23K 101/18 (2006.01); B23K 101/34 (2006.01)
CPC B23K 26/322 (2013.01) [B23K 26/062 (2015.10); B23K 26/073 (2013.01); B23K 26/0876 (2013.01); B23K 26/244 (2015.10); B23K 2101/18 (2018.08); B23K 2101/34 (2018.08)] 20 Claims
OG exemplary drawing
 
1. A method of welding two metal sheets, the method comprising:
providing a first sheet having a first weld surface and a second sheet having a second weld surface, the first sheet having a coating comprising an alloy of aluminum and silicon on the first weld surface; and
irradiating the first weld surface and the second weld surface with a laser beam, the laser beam having an inner core and an outer ring with different intensity profiles,
wherein the laser beam is moved with a wobbling motion in a feed direction along an imaginary feed line and perpendicular to the imaginary feed line, and
wherein a path of the laser beam along the imaginary feed line is of a periodic shape, a width of the path perpendicular to the imaginary feed line being greater than a length of a period of the path along the imaginary feed line.