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DE102014214957A1 - Bearing ring and method for producing a bearing ring - Google Patents

Bearing ring and method for producing a bearing ring Download PDF

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Publication number
DE102014214957A1
DE102014214957A1 DE102014214957.6A DE102014214957A DE102014214957A1 DE 102014214957 A1 DE102014214957 A1 DE 102014214957A1 DE 102014214957 A DE102014214957 A DE 102014214957A DE 102014214957 A1 DE102014214957 A1 DE 102014214957A1
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Germany
Prior art keywords
bearing ring
producing
bearing
cooling channels
manufacturing process
Prior art date
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Ceased
Application number
DE102014214957.6A
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German (de)
Inventor
Oskar Beer
Edgar Streit
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Schaeffler Technologies AG and Co KG
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Schaeffler Technologies AG and Co KG
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Priority to DE102014214957.6A priority Critical patent/DE102014214957A1/en
Priority to PCT/DE2015/200423 priority patent/WO2016015728A1/en
Publication of DE102014214957A1 publication Critical patent/DE102014214957A1/en
Ceased legal-status Critical Current

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    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
    • B22F10/20—Direct sintering or melting
    • B22F10/28—Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/24—After-treatment of workpieces or articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
    • B22F5/10—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of articles with cavities or holes, not otherwise provided for in the preceding subgroups
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C33/00—Making ferrous alloys
    • C22C33/02—Making ferrous alloys by powder metallurgy
    • C22C33/0257—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements
    • C22C33/0264—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements the maximum content of each alloying element not exceeding 5%
    • C22C33/0271—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements the maximum content of each alloying element not exceeding 5% with only C, Mn, Si, P, S, As as alloying elements, e.g. carbon steel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
    • F01D25/08—Cooling; Heating; Heat-insulation
    • F01D25/12—Cooling
    • F01D25/125—Cooling of 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
    • F16C37/00—Cooling of bearings
    • F16C37/007—Cooling of bearings of rolling bearings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy
    • 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
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/04—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
    • F16C19/06—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row or balls
    • 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
    • F16C2220/00—Shaping
    • 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
    • F16C2360/00—Engines or pumps
    • F16C2360/23—Gas turbine engines
    • 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
    • F16C33/60—Raceways; Race rings divided or split, e.g. comprising two juxtaposed rings
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T50/00—Aeronautics or air transport
    • Y02T50/60—Efficient propulsion technologies, e.g. for aircraft

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Articles (AREA)

Abstract

Die Erfindung betrifft ein Verfahren zur Herstellung eines Lagerrings mit integrierten Kühlkanälen und einen Lagerring mit integrierten Kühlkanälen.The invention relates to a method for producing a bearing ring with integrated cooling channels and a bearing ring with integrated cooling channels.

Description

Gegenstand der ErfindungSubject of the invention

Die Erfindung betrifft ein Verfahren zur Herstellung eines Lagerrings mit integrierten Kühlkanälen und einen Lagerring mit integrierten Kühlkanälen.The invention relates to a method for producing a bearing ring with integrated cooling channels and a bearing ring with integrated cooling channels.

Stand der TechnikState of the art

Lagerringe in Flugtriebwerken sind generell hohen Überrollbelastungen und hohen Betriebstemperaturen ausgesetzt. Dies gilt in besonderem Maße für Lagerringe in Hauptwellenlagerungen. Als Werkstoffe für derartige Lagerring werden überwiegend warmfeste durchhärtende oder einsatzgehärtete Stähle, wie beispielsweise M50 (AMS 6491), M50NiL (AMS 6278), RBD, Pyrowear 675 (AMS 5930) eingesetzt.Bearing rings in aircraft engines are generally exposed to high roll-over loads and high operating temperatures. This applies in particular to bearing rings in main shaft bearings. As materials for such bearing ring predominantly heat-resistant through hardening or case hardened steels, such as M50 (AMS 6491), M50NiL (AMS 6278), RBD, Pyrowear 675 (AMS 5930) are used.

Die Wärmeableitung aus den Kontaktbereichen erfolgt durch einen kontinuierlichen Ölstrom. Dabei kann eine verbesserte Wärmeableitung aus dem Kontaktbereich eine Leistungssteigerung von Lagern bewirken, beispielsweise im Triebwerksbereich. Bekannt ist eine Wärmeableitung beispielsweise aus der EP 2 503 107 B1 , die eine Lageranordnung für eine Strömungsmaschine beschreibt, wobei ein Lagergehäuseteil mit einem Kühlmittelkanal und ein Lagergehäuseteil mit einem Schmiermittelkanal versehen sind, wobei der Kühlmittelkanal und der Schmiermittelkanal voneinander fluidisch getrennt sind. Konkret wird ein Materialverbund aus einem Lagergehäuse mit integrierten Kühlkanälen im Verbund mit einer Lagerschale beschrieben.The heat dissipation from the contact areas is carried out by a continuous flow of oil. In this case, improved heat dissipation from the contact region can bring about an increase in performance of bearings, for example in the engine area. A heat dissipation is known for example from the EP 2 503 107 B1 DE-2008-02755A, which describes a bearing arrangement for a turbomachine, wherein a bearing housing part with a coolant channel and a bearing housing part are provided with a lubricant channel, wherein the coolant channel and the lubricant channel are fluidly separated from one another. Specifically, a composite material is described from a bearing housing with integrated cooling channels in conjunction with a bearing shell.

Da jedoch die Dauerfestigkeit der genannten warmfesten Stähle mit steigender Temperatur abnimmt und auch die Betriebstemperatur, unter der die zur Schmierung und Wärmeabfuhr verwendeten Öle eingesetzt werden können, begrenzt ist, kann mit den derzeit verwendeten Lagerwerkstoffen und Ölen eine höhere Temperatur im Kontaktbereich nicht zugelassen werden.However, since the fatigue strength of the above-mentioned heat-resistant steels decreases with increasing temperature and also the operating temperature at which the oils used for lubrication and heat dissipation can be used is limited, a higher temperature in the contact area can not be allowed with the currently used bearing materials and oils.

Grundsätzlich ist zwar auch in der EP 2 503 107 B1 eine Wärmeableitung aus dem Kontaktbereich möglich. Die Kühlmöglichkeit ist jedoch begrenzt, da die vom Kühlmittel durchströmten Kanäle relativ weit von der Kontaktfläche entfernt sind, da die Lagerschale aus Festigkeitsgründen eine bestimmte Mindestdicke aufweisen muss. Darüberhinaus ist die Herstellung des beschriebenen Verbundes problematisch. Weiterhin wird durch das Einbringen der Kühlkanäle am Innendurchmesser des Innenrings oder am Außendurchmesser des Aussenrings die dort vorliegenden Passungsverhältnisse, beispielsweise im Hinblick auf Festigkeit und unterschiedliche Ausdehnung der Passungspartner, beeinflusst. Basically, although in the EP 2 503 107 B1 a heat dissipation from the contact area possible. However, the possibility of cooling is limited, since the channels through which the coolant flows are relatively far away from the contact surface, since the bearing shell must have a certain minimum thickness for reasons of strength. Moreover, the production of the described composite is problematic. Furthermore, by the introduction of the cooling channels on the inner diameter of the inner ring or on the outer diameter of the outer ring, the fitting conditions present there, for example, in terms of strength and different expansion of the fit partners, influenced.

Aufgabe der ErfindungObject of the invention

Aufgabe der Erfindung ist es demnach, Lagerringe und ein Verfahren zu deren Herstellung bereitzustellen, wobei eine effektive Wärmeabfuhr aus dem Kontaktbereich möglich ist.The object of the invention is therefore to provide bearing rings and a method for their production, wherein an effective heat dissipation from the contact area is possible.

Beschreibung der ErfindungDescription of the invention

Gelöst wird diese Aufgabe durch ein Verfahren nach Patentanspruch 1.This object is achieved by a method according to claim 1.

Erfindungsgemäß werden Kühlkanäle in unmittelbarer Nähe der Kontaktzone, bzw. der Lauffläche des Lagerrings, dergestalt eingebracht, dass diese sich direkt in dem Werkstoff, der die Laufbahn ausbildet, befinden.According to the invention, cooling channels in the immediate vicinity of the contact zone, or the running surface of the bearing ring, are introduced in such a way that they are located directly in the material which forms the raceway.

Damit ist eine wirksame Abfuhr von Wärme aus dem Kontaktbereich durch öldurchströmte Kanäle möglich, die sich in den Nahbereichen der Kontaktzonen der Lagerringe befinden. Ein Einbringen von Kühlkanälen ist in diesem Bereich mit bisher angewendeten Fertigungsverfahren nicht möglich. Erfindungsgemäß ist daher vorgesehen, die Kühlkanäle während des Ausformens der Lagerringe auszubilden – vorzugsweise durch ein generatives Fertigungsverfahren, wie beispielsweise Laserschmelzen, Lasersintern oder dergleichen.Thus, an effective dissipation of heat from the contact area by oil-flow channels is possible, which are located in the vicinity of the contact zones of the bearing rings. An introduction of cooling channels is not possible in this area with hitherto applied manufacturing processes. According to the invention, it is therefore provided to form the cooling channels during the molding of the bearing rings - preferably by a generative manufacturing method, such as laser melting, laser sintering or the like.

Allerdings ist dieses Verfahren nach dem derzeitigen Stand der Technik nicht anwendbar bei den durchhärtenden Stählen, die für die extremen Einsatzzwecke, beispielsweise in Flugtriebwerken, benötigt werden, da sich während des generativen Herstellungsprozesses starker Verzug und Risse bilden können.However, this prior art technique is not applicable to the through hardening steels required for extreme applications, such as in aircraft engines, because of severe distortion and cracking during the additive manufacturing process.

Erfindungsgemäß ist daher vorgesehen, für das generative Fertigungsverfahren ein Pulver eines niedrigkohlenstoffhaltigen Stahles zu verwenden. Die notwendige Härte im Bereich der Laufbahnen kann dann durch ein nachfolgendes Randschichthärten erfolgen, beispielsweise durch ein nachträgliches Anreichern mit Kohlenstoff.According to the invention, it is therefore intended to use a powder of a low-carbon steel for the additive manufacturing process. The necessary hardness in the region of the raceways can then be achieved by subsequent surface hardening, for example by subsequent enrichment with carbon.

Gelöst wird die Aufgabe ferner durch einen Lagerring gemäß Patentanspruch 6.The object is further achieved by a bearing ring according to claim 6.

Der erfindungsgemäße Lagerring umfasst dabei integrierte innenliegende Kühlkanäle. In einer bevorzugten Ausführungsform weisen diese Kühlkanäle einen Querschnitt auf, der von einer Kreisform abweicht. Besonders bevorzugt ist ein Querschnitt, der sich bogenförmig in ähnlicher Form wie die zu kühlende Laufbahn erstreckt.The bearing ring according to the invention comprises integrated internal cooling channels. In a preferred embodiment, these cooling channels have a cross section which deviates from a circular shape. Particularly preferred is a cross section which extends arcuately in a similar shape as the raceway to be cooled.

Beschreibung der Figur Description of the figure

1 zeigt einen Querschnitt durch einen erfindungsgemäßen Lagerring 10 mit entlang der Laufbahn 11 eingebrachten Kanälen 12. 1 shows a cross section through a bearing ring according to the invention 10 along the track 11 introduced channels 12 ,

ZITATE ENTHALTEN IN DER BESCHREIBUNG QUOTES INCLUDE IN THE DESCRIPTION

Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Zitierte PatentliteraturCited patent literature

  • EP 2503107 B1 [0003, 0005] EP 2503107 B1 [0003, 0005]

Claims (6)

Verfahren zur Herstellung eines Lagerrings (10), umfassend folgende Schritte: – Bereitstellen eines Pulvers eines niedrigkohlenstoffhaltigen Stahles – Herstellung eines Lagerrings (10) mit innenliegenden Kanälen (12) nahe einer Laufbahn (11) des Lagerrings (10) mittels eines generativen Fertigungsverfahren.Method for producing a bearing ring ( 10 ), comprising the following steps: - Providing a powder of a low-carbon steel - Producing a bearing ring ( 10 ) with internal channels ( 12 ) near a career ( 11 ) of the bearing ring ( 10 ) by means of a generative manufacturing process. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass als generatives Fertigungsverfahren Laserschmelzen angewendet wird.A method according to claim 1, characterized in that as a generative manufacturing process laser melting is applied. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass als generatives Fertigungsverfahren Lasersintern angewendet wird.A method according to claim 1, characterized in that is used as a generative manufacturing process laser sintering. Verfahren nach einem der Ansprüche 1 bis 3, ferner umfassend ein nachfolgendes Randschichthärten des Lagerrings.Method according to one of claims 1 to 3, further comprising a subsequent surface hardening of the bearing ring. Verfahren nach Anspruch 4, wobei das Randschichthärten ein Anreichern mit Kohlenstoff umfasst.The method of claim 4, wherein the surface hardening comprises carbon enrichment. Lagerring (10) mit einem oder mehreren nahe einer Laufbahn (11) integrierten innenliegenden Kanälen (12).Bearing ring ( 10 ) with one or more close to a career ( 11 ) integrated internal channels ( 12 ).
DE102014214957.6A 2014-07-30 2014-07-30 Bearing ring and method for producing a bearing ring Ceased DE102014214957A1 (en)

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DE102014214957.6A DE102014214957A1 (en) 2014-07-30 2014-07-30 Bearing ring and method for producing a bearing ring
PCT/DE2015/200423 WO2016015728A1 (en) 2014-07-30 2015-07-27 Bearing ring and method for producing a bearing ring

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Application Number Priority Date Filing Date Title
DE102014214957.6A DE102014214957A1 (en) 2014-07-30 2014-07-30 Bearing ring and method for producing a bearing ring

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016215812A1 (en) 2016-08-23 2018-03-01 Schaeffler Technologies AG & Co. KG Process for processing a case hardening steel to form a component
DE102017106234A1 (en) * 2017-03-23 2018-04-12 Schaeffler Technologies AG & Co. KG Bearing assembly with a bearing and method for producing such
WO2018233745A1 (en) * 2017-06-21 2018-12-27 Schaeffler Technologies AG & Co. KG Method for producing a bearing ring by means of an additive manufacturing method and rolling element bearing having a bearing ring

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Publication number Priority date Publication date Assignee Title
DE102023125627B4 (en) 2023-09-21 2025-05-15 Schaeffler Technologies AG & Co. KG Method for producing bearing components of a turbocharger bearing, turbocharger bearing, turbocharger

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DE102010034962A1 (en) * 2010-08-20 2012-02-23 Schaeffler Technologies Gmbh & Co. Kg Bearing component, in particular roller bearing cage, and method for its preparation
EP2503107B1 (en) 2011-03-22 2014-05-07 MTU Aero Engines GmbH Bearings, fluid flow engine and method

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DE3217892A1 (en) * 1982-05-12 1983-11-17 Glyco-Metall-Werke Daelen & Loos Gmbh, 6200 Wiesbaden COOLED SLIDING BEARING
DE10031470A1 (en) * 2000-06-28 2002-01-10 Krupp Werner & Pfleiderer Gmbh gear pump
DE102006025008B4 (en) * 2006-05-30 2022-09-15 Schaeffler Technologies AG & Co. KG Process for hardening running surfaces of roller bearing components
DE102007025133A1 (en) * 2007-05-30 2008-12-04 Mahle International Gmbh loader

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Publication number Priority date Publication date Assignee Title
DE102004047053B3 (en) * 2004-09-28 2006-04-13 Gebrüder Reinfurt GmbH & Co. KG Roller bearing components are produced by preparing a powder metallurgical open pored sintered stainless steel member, and treating the surface mechanically and/or chemically
DE102010034962A1 (en) * 2010-08-20 2012-02-23 Schaeffler Technologies Gmbh & Co. Kg Bearing component, in particular roller bearing cage, and method for its preparation
EP2503107B1 (en) 2011-03-22 2014-05-07 MTU Aero Engines GmbH Bearings, fluid flow engine and method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016215812A1 (en) 2016-08-23 2018-03-01 Schaeffler Technologies AG & Co. KG Process for processing a case hardening steel to form a component
WO2018036590A1 (en) 2016-08-23 2018-03-01 Schaeffler Technologies AG & Co. KG Method for processing a case-hardening steel to form a component
DE102017106234A1 (en) * 2017-03-23 2018-04-12 Schaeffler Technologies AG & Co. KG Bearing assembly with a bearing and method for producing such
WO2018233745A1 (en) * 2017-06-21 2018-12-27 Schaeffler Technologies AG & Co. KG Method for producing a bearing ring by means of an additive manufacturing method and rolling element bearing having a bearing ring

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Publication number Publication date
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