Method for producing a threaded nut of a threaded drive, in particular a ball screw nut of a ball screw drive
AssigneeSchaeffler Technologies AG & Co. KG
InventorsMario Kreutzer, Dieter Eckert, Paul Heinz, Richard Baier
Life of this patent
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Abstract
The disclosure relates to a method for producing a threaded nut of a threaded drive. In a forming process, a sleeve is produced from a steel sheet which is suitable for case-hardening. A flange is integrally formed on the sleeve for welding to a machine part. A welding surface of the flange has a diffusion-inhibiting layer which inhibits the penetration of carbon into the welding surface. The sleeve is case-hardened, and the welding surface is then exposed by removing the diffusion-inhibiting layer. The sleeve can be bonded to a machine part on the exposed welding surface of the sleeve.
Claims15
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.
A method for producing a threaded nut of a threaded drive, the method comprising:
- providing a steel sheet having a diffusion-inhibiting layer, the diffusion-inhibiting layer configured to inhibit penetration of carbon during a case-hardening process of the steel sheet,
- forming a sleeve from the steel sheet, the diffusion-inhibiting layer arranged on an outer surface of the sleeve,
- forming a flange integrally with the sleeve, the flange having a welding surface covered by a portion of the diffusion-inhibiting layer, the 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, and
- case-hardening the sleeve.
Dependencies are inferred from the claim text.