US 12,007,003 B2
Method for producing a threaded nut of a threaded drive, in particular a ball screw nut of a ball screw drive
Mario Kreutzer, Sonneberg (DE); Dieter Eckert, Fürth (DE); Paul Heinz, Forchheim (DE); and Richard Baier, Aurachtal (DE)
Assigned to Schaeffler Technologies AG & Co. KG, Herzogenaurach (DE)
Appl. No. 17/628,057
Filed by Schaeffler Technologies AG & Co. KG, Herzogenaurach (DE)
PCT Filed Jun. 25, 2020, PCT No. PCT/DE2020/100544
§ 371(c)(1), (2) Date Jan. 18, 2022,
PCT Pub. No. WO2021/018338, PCT Pub. Date Feb. 4, 2021.
Claims priority of application No. 10 2019 120 813.0 (DE), filed on Aug. 1, 2019.
Prior Publication US 2022/0275854 A1, Sep. 1, 2022
Int. Cl. F16H 25/24 (2006.01); B23K 31/02 (2006.01); C21D 1/06 (2006.01); C21D 9/00 (2006.01); C21D 9/50 (2006.01); C23C 8/02 (2006.01); C23C 8/22 (2006.01); C25D 7/00 (2006.01); F16H 25/22 (2006.01); C25D 3/38 (2006.01)
CPC F16H 25/24 (2013.01) [B23K 31/02 (2013.01); C21D 1/06 (2013.01); C21D 9/0093 (2013.01); C21D 9/50 (2013.01); C23C 8/02 (2013.01); C23C 8/22 (2013.01); F16H 25/2214 (2013.01); C25D 3/38 (2013.01); C25D 7/003 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A method for producing a threaded nut of a threaded drive, having the following steps:
providing a sleeve produced from a steel sheet;
molding a rolling profile for a rolling contact with rolling bodies on an inner circumference of the sleeve, said rolling profile being wound in a helical manner about a longitudinal axis of the sleeve;
welding a flange to an end face of the sleeve to form the threaded nut,
the flange including a welding surface on a flange end face facing away from the sleeve for welding to a machine part,
the welding surface initially having a diffusion-inhibiting layer which inhibits a penetration of carbon into the welding surface; and
case-hardening the threaded nut.