EP2084413A1 - Nadellager - Google Patents
NadellagerInfo
- Publication number
- EP2084413A1 EP2084413A1 EP07817734A EP07817734A EP2084413A1 EP 2084413 A1 EP2084413 A1 EP 2084413A1 EP 07817734 A EP07817734 A EP 07817734A EP 07817734 A EP07817734 A EP 07817734A EP 2084413 A1 EP2084413 A1 EP 2084413A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- needle bearing
- needle
- bearing
- needles
- bearing ring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
- F16C19/44—Needle bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/34—Rollers; Needles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/58—Raceways; Race rings
- F16C33/62—Selection of substances
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/58—Raceways; Race rings
- F16C33/64—Special methods of manufacture
Definitions
- the invention is in the field of hybrid rolling bearings and relates to a needle bearing with at least one bearing ring.
- needle roller bearings are known in principle for a long time and commercially available.
- needle bearings are usually two bearing rings - an inner bearing ring (so-called inner ring) and an outer bearing ring (outer ring), each with a raceway for the rolling elements (cylindrical rollers or needles) - provided.
- inner ring inner bearing ring
- outer bearing ring outer bearing ring
- needle in the context of the present invention comprises rolling elements of cylindrical shape, preferably needle-shaped rolling elements with a diameter which is very thin in relation to the length.
- martensitic hardenable steels for example Cronidur 30, Energytechnik, Essen
- these steels have sufficient hardenability; However, they are not sufficient in their corrosion resistance for particularly demanding applications and also tend to embrittlement in a hydrogen-containing atmosphere.
- these steels are magnetic, which can lead to undesirable attachment of metallic abrasion or the like. Suitable needles for needle roller bearings could not previously be realized from this material.
- the object of the invention in the creation of a needle bearing, which has extremely high load ratings and also has a long service life in corrosive acting and / or hydrogen-containing operating atmosphere.
- a needle bearing with at least one bearing ring which consists of a hardened austenitic steel with a content of carbon and nitrogen of a total of 0.8 to 1, 2 wt%, and with rolling on a running surface of the bearing ring needles a ceramic whose surface defects are smaller than 40 ⁇ m.
- An essential aspect of the invention is the use of nitrogen / carbon austenites with about 0.8 to 1, 2 carbon and nitrogen content, which form a sufficiently hardenable steel grade. With this material can namely hardening of above 50 Rockwell Cone (HRC) reach the running surfaces of bearing rings.
- the austenitic steel is characterized by a much higher compared to martensitic hardenable steels Corrosion resistance and resistance to hydrogen-containing environment.
- This provides a hybrid needle roller bearing with excellent running properties, which is also characterized by a good run under insufficient lubrication at high load ratings.
- the needles can preferably consist of silicon nitride, silicon oxide, aluminum oxide or zirconium oxide. These materials form ceramics with excellent rolling element properties, whereby the permissible surface defects can be reliably and comparatively easily limited to less than 40 ⁇ m. Surface defects in this context are to be understood as meaning any openings in the surface or foreign inclusions.
- the hardening of the bearing rings can preferably be done by cold working.
- the cold working can be done by deep drawing.
- disks are more preferably provided as starting workpieces, which have a wall thickness of 2 to 20 mm after deep drawing.
- this or these are heat treated according to an advantageous embodiment of the invention after cold working above a temperature of 400 0 C, more preferably at temperatures of 400 ° to 500 0 C.
- the duration of the heat treatment is - depending on the mass of the bearing rings - usually about 1 to 3 hours.
- cold forming eg by deep drawing
- the subsequent outsourcing bearing rings can be produced with particularly good strength values and a hardness of above 50 HRC.
- the ceramic needles for example made of silicon nitride, can be produced by cold pressing, subsequent sintering and hot-insulating pressing (HIP). Finally, a looping process and / or a gas pressure sintering may be provided in the ceramic needles thus produced.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Rolling Contact Bearings (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006050122A DE102006050122A1 (de) | 2006-10-25 | 2006-10-25 | Nadellager |
PCT/DE2007/001900 WO2008049410A1 (de) | 2006-10-25 | 2007-10-23 | Nadellager |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2084413A1 true EP2084413A1 (de) | 2009-08-05 |
Family
ID=39067410
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07817734A Withdrawn EP2084413A1 (de) | 2006-10-25 | 2007-10-23 | Nadellager |
Country Status (5)
Country | Link |
---|---|
US (1) | US20100027933A1 (de) |
EP (1) | EP2084413A1 (de) |
JP (1) | JP4921560B2 (de) |
DE (1) | DE102006050122A1 (de) |
WO (1) | WO2008049410A1 (de) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9561845B2 (en) | 2007-12-06 | 2017-02-07 | Roller Bearing Company Of America, Inc. | Bearing installed on an aircraft structure |
US10012265B2 (en) | 2007-12-06 | 2018-07-03 | Roller Bearing Company Of America, Inc. | Corrosion resistant bearing material |
EP2128465B1 (de) * | 2008-05-14 | 2011-07-06 | Siemens Aktiengesellschaft | Wälzlager, Wälzkörper für Wälzlager und Gerät mit Wälzlager |
US10077808B2 (en) | 2013-12-18 | 2018-09-18 | Roller Bearing Company Of America, Inc. | Roller profile for hourglass roller bearings in aircraft |
US9890814B2 (en) | 2014-06-03 | 2018-02-13 | Roller Bearing Company Of America, Inc. | Cage for hourglass roller bearings |
US10302127B2 (en) | 2015-04-28 | 2019-05-28 | E. I. Du Pont De Nemours And Company | Needle bearing |
Family Cites Families (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3537658A1 (de) * | 1985-10-23 | 1987-04-23 | Schaeffler Waelzlager Kg | Verfahren zur herstellung eines gehaerteten, aus einem austenitischen werkstoff bestehenden unmagnetisierbaren waelzlagerbauteils und nach diesem verfahren hergestelltes waelzlagerbauteil |
US5019332A (en) * | 1988-03-16 | 1991-05-28 | Carpenter Technology Corporation | Heat, corrosion, and wear resistant steel alloy |
DD270743A1 (de) * | 1988-04-18 | 1989-08-09 | Fortschritt Veb K | Verfahren zur herstellung von lagerkaefigen |
DE3901470C1 (en) * | 1989-01-19 | 1990-08-09 | Vereinigte Schmiedewerke Gmbh, 4630 Bochum, De | Cold-working steel and its use |
DE4212966C2 (de) * | 1992-04-18 | 1995-07-13 | Ver Schmiedewerke Gmbh | Verwendung eines martensitischen Chrom-Stahls |
JPH05331615A (ja) * | 1992-05-29 | 1993-12-14 | Ntn Corp | 非磁性鋼製転がり軸受部品 |
US5520467A (en) * | 1993-09-09 | 1996-05-28 | Ngk Ltd. | Rolling bearing for use in molten metal |
JPH1046286A (ja) * | 1996-07-26 | 1998-02-17 | Nippon Seiko Kk | 転がり軸受 |
WO1998041663A1 (de) * | 1997-03-15 | 1998-09-24 | Fag Aircraft/Super Precision Bearings Gmbh | Hochleistungswälzlager bzw. wälzbeanspruchte bauteile |
DE19740435A1 (de) * | 1997-09-15 | 1999-03-18 | Schaeffler Waelzlager Ohg | Verfahren zum Herstellen eines Käfigs |
JP2000297819A (ja) * | 1999-04-14 | 2000-10-24 | Nsk Ltd | セラミックスコーティングボールを用いた軸受 |
DE19959499A1 (de) * | 1999-12-10 | 2001-06-13 | Schaeffler Waelzlager Ohg | Selbstschmierendes Wälzlager |
JP2002106570A (ja) * | 2000-07-27 | 2002-04-10 | Kyocera Corp | 転動体およびこれを用いたベアリング |
JP2002147467A (ja) * | 2000-08-29 | 2002-05-22 | Nsk Ltd | 転がり支持装置 |
US6761777B1 (en) * | 2002-01-09 | 2004-07-13 | Roman Radon | High chromium nitrogen bearing castable alloy |
JP2005325961A (ja) * | 2004-05-17 | 2005-11-24 | Nsk Ltd | 機械部品及び転がり軸受用保持器 |
DE102004041962B4 (de) * | 2004-08-04 | 2014-05-28 | Schaeffler Technologies Gmbh & Co. Kg | Wälzlager |
US20060026838A1 (en) * | 2004-08-06 | 2006-02-09 | Timken Us Corporation | High carbon steel formed bearing assembly |
DE102004047053B3 (de) * | 2004-09-28 | 2006-04-13 | Gebrüder Reinfurt GmbH & Co. KG | Verfahren zur Herstellung von Wälzlagerteilen |
DE102004048172A1 (de) | 2004-10-02 | 2006-04-06 | Ina-Schaeffler Kg | Spanlos hergestelltes dünnwandiges rostfreies Lagerbauteil insbesondere Wälzlagerbauteil |
-
2006
- 2006-10-25 DE DE102006050122A patent/DE102006050122A1/de not_active Withdrawn
-
2007
- 2007-10-23 US US12/447,188 patent/US20100027933A1/en not_active Abandoned
- 2007-10-23 JP JP2009533654A patent/JP4921560B2/ja not_active Expired - Fee Related
- 2007-10-23 EP EP07817734A patent/EP2084413A1/de not_active Withdrawn
- 2007-10-23 WO PCT/DE2007/001900 patent/WO2008049410A1/de active Application Filing
Non-Patent Citations (2)
Title |
---|
GAVRILJUK V G ET AL: "Corrosion-resistant analogue of Hadfield steel", MATERIALS SCIENCE AND ENGINEERING A: STRUCTURAL MATERIALS:PROPERTIES, MICROSTRUCTURE & PROCESSING, LAUSANNE, CH, vol. 420, no. 1-2, 25 March 2006 (2006-03-25), pages 47 - 54, XP027952026, ISSN: 0921-5093, [retrieved on 20060325] * |
See also references of WO2008049410A1 * |
Also Published As
Publication number | Publication date |
---|---|
JP4921560B2 (ja) | 2012-04-25 |
DE102006050122A1 (de) | 2008-04-30 |
US20100027933A1 (en) | 2010-02-04 |
JP2010507757A (ja) | 2010-03-11 |
WO2008049410A1 (de) | 2008-05-02 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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17P | Request for examination filed |
Effective date: 20090429 |
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AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR |
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17Q | First examination report despatched |
Effective date: 20091106 |
|
DAX | Request for extension of the european patent (deleted) | ||
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: SCHAEFFLER TECHNOLOGIES GMBH & CO. KG |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: SCHAEFFLER TECHNOLOGIES AG & CO. KG |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: SCHAEFFLER TECHNOLOGIES GMBH & CO. KG |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: SCHAEFFLER TECHNOLOGIES AG & CO. KG |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 20150917 |
|
P01 | Opt-out of the competence of the unified patent court (upc) registered |
Effective date: 20230523 |