US 11,701,732 B2
Welding gun and welding method
Uwe Popp, Widnau (CH); and Klaus Bertsch, Frastanz (AT)
Assigned to HILTI AKTIENGESELLSCHAFT, Schaan (LI)
Appl. No. 16/757,916
Filed by HILTI AKTIENGESELLSCHAFT, Schaan (LI)
PCT Filed Nov. 21, 2018, PCT No. PCT/EP2018/082102
§ 371(c)(1), (2) Date Apr. 21, 2020,
PCT Pub. No. WO2019/120842, PCT Pub. Date Jun. 27, 2019.
Claims priority of application No. 17208713 (EP), filed on Dec. 20, 2017.
Prior Publication US 2020/0338660 A1, Oct. 29, 2020
Int. Cl. B23K 9/20 (2006.01); B23K 9/28 (2006.01); B23K 9/32 (2006.01)
CPC B23K 9/202 (2013.01) [B23K 9/205 (2013.01); B23K 9/287 (2013.01); B23K 9/325 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A welding gun for welding a welding stud to a substrate in a welding direction, the welding gun comprising a holding device for holding the welding stud during a welding operation, wherein the welding stud has a contact surface which is intended to contact the substrate before and/or during the welding operation; a stud lifting device for conveying the holding device against the welding direction to an immersing start position; a stud immersing device for conveying the holding device from the immersing start position in the welding direction; a bearing element having a bearing surface for supporting the welding gun on the substrate; a locking element configured to lock the stud lifting device in an offset position relative to the bearing surface; and, a device configured to offset the immersing start position relative to the bearing surface in the welding direction.