Thin-walled bearing component, produced without material-removing machining

a technology of thin-walled bearings and machining, which is applied in the direction of couplings, heat treatment devices, furnaces, etc., can solve the problem that the cold-rolled strip is unlikely to corrode, and achieve the effect of high-beneficial effect on the dimensional stability of the components

Inactive Publication Date: 2006-04-06
INA SCHAEFFLER KG
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0018] This has a highly beneficial effect on the dimensional stability of the components. Consequently, there is no need for sudden quenching, which in the prior art at times leads to changes in dimensions and shape.

Problems solved by technology

The high chromium content means that the cold-rolled strip is unlikely to corrode.

Method used

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  • Thin-walled bearing component, produced without material-removing machining
  • Thin-walled bearing component, produced without material-removing machining
  • Thin-walled bearing component, produced without material-removing machining

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Embodiment Construction

[0025]FIG. 1 shows a sectional view through a bearing component 1 according to the invention in the exemplary form of a universal joint bush 2. This is a rotationally symmetrical component comprising a bush base 3, a bush wall 4 and a flange 5. The universal joint bush is initially deep-drawn from a cold-rolled strip, without the flanged edge 5 yet being provided. This means that the cylinder wall 4 extends in a straight line. After the introduction of needle bearing bodies, the free edge is bent over to form the flanged edge, by means of which the needles are then held in place.

[0026] The universal joint bush 2 is drawn from a cold-rolled strip which has a carbon content of 0.15-0.25% with a chromium alloying content of at least 12%. Known cold-rolled strips which can be used and have these contents as well as isotropic deformation properties, which ensure a homogeneous wall thickness in the drawn component, include, for example, X20Cr13 or X22Cr13. Both are high-alloy steels with...

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Abstract

A thin-walled stainless bearing component, in particular a rolling bearing component, such as bearing ring, sleeve or bush, produced without material-removing machining by being deep-drawn from a cold-rolled strip with a carbon content of 0.15-0.25% and a chromium alloying content of at least 12%, and having a martensitic microstructure which is enriched with dissolved nitrogen at least at a side edge zone.

Description

FIELD OF THE INVENTION [0001] The invention relates to a thin-walled preferably stainless, bearing component, in particular a rolling bearing component, such as a bearing ring, sleeve or bush, that is produced without material-removing machining. BACKGROUND OF THE INVENTION [0002] Bearing components of this type, which are used, for example, in needle bearings or the like, are usually deep-drawn from a cold-rolled strip. A precondition for the use of a deep-drawing process is that internal and external diameters of constant wall thickness with a correspondingly low level of roughening of the running surfaces, and which require no further remachining, be achieved. This requires a uniform, isotropic deformability of the cold-rolled strip. In the prior art, for example, a cold-rolled strip of deep-drawing steel containing approximately 0.10% of carbon as well as manganese, chromium and nickel is used for this purpose. Typical steels in this respect are DC04 modified, C15 modified, SAE1...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C23C8/26
CPCB21D53/10C21D1/06C21D6/002C21D9/40C21D2211/008C22C38/001C22C38/18C23C8/26C23C8/80F16C21/005F16C33/30F16C33/62F16C33/64F16D3/385F16C33/588F16C2361/41Y02T10/86
Inventor GRELL, KARL-LUDWIGKRUPPA, MARTINMULLER, THOMASHARING, WOLFGANGMERKLEIN, CARSTEN
Owner INA SCHAEFFLER KG
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