US 12,253,144 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. 17/629,797
Filed by Schaeffler Technologies AG & Co. KG, Herzogenaurach (DE)
PCT Filed Jun. 25, 2020, PCT No. PCT/DE2020/100546
§ 371(c)(1), (2) Date Jan. 25, 2022,
PCT Pub. No. WO2021/018339, PCT Pub. Date Feb. 4, 2021.
Claims priority of application No. 10 2019 120 812.2 (DE), filed on Aug. 1, 2019.
Prior Publication US 2022/0260139 A1, Aug. 18, 2022
Int. Cl. B21D 53/24 (2006.01); F16H 25/22 (2006.01); F16H 25/24 (2006.01)
CPC F16H 25/2204 (2013.01) [B21D 53/24 (2013.01); F16H 2025/2481 (2013.01); F16H 2025/249 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A method for producing a threaded nut of a threaded drive, the method comprising:
forming a sleeve from a steel sheet, the steel sheet configured for case-hardening,
forming a flange integrally with the sleeve, the flange having a welding surface configured for welding to a machine part,
forming a rolling profile on an inner circumference of the sleeve, the rolling profile: i) configured for rolling contact with rolling elements; and, ii) extending helically around a longitudinal axis of the sleeve,
applying a diffusion-inhibiting layer to at least a side of the flange facing the machine part, the diffusion-inhibiting layer configured to inhibit penetration of carbon into the welding surface, and
case-hardening the sleeve.