US 12,257,643 B2
Device and method for increasing the speed and increasing the stability of the welding pin in friction stir welding
Markus Weigl, Donauwoerth (DE)
Assigned to GRENZEBACH MASCHINENBAU GMBH, Asbach-Bäumenheim (DE)
Filed by Grenzebach Maschinenbau GmbH, Asbach-Baeumenheim (DE)
Filed on Nov. 1, 2023, as Appl. No. 18/499,568.
Application 18/499,568 is a division of application No. 17/295,375, granted, now 11,883,901, previously published as PCT/DE2020/000207, filed on Sep. 11, 2020.
Claims priority of application No. 10 2019 006 413.5 (DE), filed on Sep. 11, 2019.
Prior Publication US 2024/0058890 A1, Feb. 22, 2024
Int. Cl. B23K 20/00 (2006.01); B23K 20/12 (2006.01)
CPC B23K 20/1255 (2013.01) 11 Claims
OG exemplary drawing
 
1. A method for increasing speed and stability of a welding pin in friction stir welding, the method comprising:
positioning the welding pin on a workpiece to be welded, the welding pin being a portion of a tool drive;
heating the workpiece by rotating the welding pin in contact with the workpiece and moving the tool drive relative to the workpiece to create a weld seam;
pressing the weld seam with a tool shoe of the tool drive for smoothing and compacting the weld seam to create a welding burr, wherein the tool shoe includes (i) a concave portion that partially surrounds the welding pin and (ii) a smoothing and compacting surface that is located directly adjacent to the welding pin; and
smoothing an unevenness of the welding burr by rolling a roller in a transition region between the weld seam and a base material of the workpiece along flanks of the tool shoe.