US20040064948A1 - Method of producing a workpiece having at least one bearing eye - Google Patents

Method of producing a workpiece having at least one bearing eye Download PDF

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Publication number
US20040064948A1
US20040064948A1 US10/678,665 US67866503A US2004064948A1 US 20040064948 A1 US20040064948 A1 US 20040064948A1 US 67866503 A US67866503 A US 67866503A US 2004064948 A1 US2004064948 A1 US 2004064948A1
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US
United States
Prior art keywords
bearing eye
friction coating
workpiece
processed
coating
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.)
Abandoned
Application number
US10/678,665
Inventor
Thomas Rumpf
E. Schneiderbauer
Helmut Spiessberger
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.)
Miba Gleitlager Austria GmbH
Original Assignee
Miba Gleitlager Austria GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Miba Gleitlager Austria GmbH filed Critical Miba Gleitlager Austria GmbH
Assigned to MIBA GLEITLAGER GMBH reassignment MIBA GLEITLAGER GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: RUMPF, THOMAS, SCHNEIDERBAUER, ELISABETH, SPIESSBERGER, HELMUT
Publication of US20040064948A1 publication Critical patent/US20040064948A1/en
Abandoned legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D7/00—Electroplating characterised by the article coated
    • C25D7/10—Bearings
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C30/00—Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process
    • 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
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • F16C33/06—Sliding surface mainly made of metal
    • F16C33/12—Structural composition; Use of special materials or surface treatments, e.g. for rust-proofing
    • 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
    • F16C9/00—Bearings for crankshafts or connecting-rods; Attachment of connecting-rods
    • F16C9/04—Connecting-rod bearings; Attachments thereof
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49636—Process for making bearing or component thereof
    • Y10T29/49705—Coating or casting

Definitions

  • the present invention relates to a method of producing a workpiece having at least one bearing eye, the bearing eye being coated with an anti-friction coating made of an alloy of a harder alloy component and a softer alloy component.
  • Friction bearings subjected to high dynamic loads for connecting rods of internal combustion engines, for example, are generally made of bearing shells which are received by a divided bearing seat of the workpiece.
  • the bearing eye provided in the workpiece be coated directly with an anti-friction material (European Patent Application 0 635 104 B1).
  • the workpiece may be coated with the anti-friction coating through a thermal spray method, before the anti-friction coating applied to the bearing eye surface is divided together with the workpiece or, if the workpiece is already divided, is itself divided corresponding to the workpiece by a fracture separation.
  • the present invention is therefore based on the object of implementing a method of producing a workpiece having at least one bearing eye of the type initially described in such a way that, with a comparatively low production cost, a high dynamic bearing load capacity may be ensured without impairing the service life.
  • This object is achieved according to the present invention in that the bearing eye is processed for a precise fit to a circular cylinder before the anti-friction coating is applied to the processed bearing eye surface in a thickness corresponding to the final dimensions, the proportion of the softer alloy component in the deposited alloy being increased with increasing coating thickness.
  • the final dimension of the running surface formed by the anti-friction coating may be ensured using a thin-layered application of the anti-friction coating without reprocessing of the anti-friction coating, with the advantage that the anti-friction coating has a constructively predetermined thickness gradient, which represents an essential requirement for a high service life of friction bearings subjected to high dynamic loads, particularly since comparatively thin anti-friction coatings having a thickness of, for example, 20 to 40 ⁇ m are possible within narrow tolerance ranges, if no compensation of imprecisions via the anti-friction coating thickness is required.
  • a further requirement for a high dynamic load capacity of such a friction bearing may be seen in the load capacity of the anti-friction coating itself, taking into consideration the running-in conditions, which require a comparatively soft running coating.
  • the anti-friction coating which is typically made of an alloy of harder and softer alloy components, is deposited on the bearing eye surface in such a way that with increasing coating thickness, the proportion of the softer alloy component in the deposited alloy is increased, so that the hardness of the anti-friction coating increases from the running surface toward the bearing eye surface. This means that in spite of good running-in conditions, a sufficient support effect to meet high dynamic loads of the friction bearing may also be applied via the anti-friction coating.
  • Such anti-friction coatings may be applied physically in vacuum with the necessary precision due to the restricted coating thickness.
  • the coating outlay may be simplified in relation to this application method by a galvanic deposition of the anti-friction coating on the bearing eye surface, however.
  • the strength of the electrical field used for the depositing procedure merely has to be changed during the galvanic deposition procedure as a function of the desired increase of the proportion of the softer alloy component.
  • the hardness gradient over the thickness of the anti-friction coating thus achieved may be controlled in accordance with the particular requirements via the current density.
  • the bearing eye surface is processed for a precise fit after assembly of the divided bearing eye and then galvanically coated with the anti-friction coating, before the anti-friction coating is divided in accordance with the division of the bearing eye through a fracture separation. Since, after the assembly of the divided bearing eye, the processing of the bearing eye for a precise fit is performed in order to provide the requirements for a tailored coating which ensures the final dimensions without reprocessing, it must merely be ensured, after the thin-layered application of the anti-friction coating, that the anti-friction coating applied is divided corresponding to the division of the bearing eye, which is advantageously performed through a fracture separation.
  • the comparatively low coating thickness and the good adhesion of the galvanically deposited anti-friction coating on the bearing eye surface represent advantageous conditions for a fracture separation without problems.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electrochemistry (AREA)
  • Sliding-Contact Bearings (AREA)

Abstract

A method of producing a workpiece having at least one bearing eye is described, the bearing eye being coated with an anti-friction coating made of an alloy of a harder alloy component and a softer alloy component. In order to achieve an advantageous load capacity, it is suggested that the bearing eye be processed for a precise fit to a circular cylinder before the anti-friction coating is applied to the processed bearing eye surface in a thickness corresponding to the final dimensions, the proportion of the softer alloy component in the deposited alloy being increased with increasing coating thickness.

Description

    1. FIELD OF THE INVENTION
  • The present invention relates to a method of producing a workpiece having at least one bearing eye, the bearing eye being coated with an anti-friction coating made of an alloy of a harder alloy component and a softer alloy component. [0001]
    • 2. DESCRIPTION OF THE PRIOR ART
  • Friction bearings subjected to high dynamic loads, for connecting rods of internal combustion engines, for example, are generally made of bearing shells which are received by a divided bearing seat of the workpiece. In order to avoid the disadvantages in regard to the overall size and therefore the weight, as well as the production cost, connected with providing separate bearing shells, it has already been suggested that the bearing eye provided in the workpiece be coated directly with an anti-friction material (European Patent Application 0 635 104 B1). For this purpose, the workpiece may be coated with the anti-friction coating through a thermal spray method, before the anti-friction coating applied to the bearing eye surface is divided together with the workpiece or, if the workpiece is already divided, is itself divided corresponding to the workpiece by a fracture separation. As an additional advantage of this direct coating of the bearing eye, it was emphasized that the bearing eye surface to be coated must no longer be reprocessed for a precise fit, because imprecisions are compensated for by applying the anti-friction coating and it is therefore no longer necessary to appropriately process the anti-friction coating itself precisely. However, the compensation of imprecisions of the bearing eye requires sufficiently thick anti-friction coatings, which thermal spray methods are particularly suitable for applying. Such thermal spray methods have the disadvantage, however, that the adhesion between the anti-friction coating sprayed on and the bearing eye surface is hardly sufficient for high load requirements without something further. In addition, due to the compensation of imprecisions, after the anti-friction coating has been processed for a precise fit, a non-uniform thickness of the anti-friction coating, whose distribution is unpredictable, must be expected, which, due to the fatigue strength, which is reduced with the thickness of the anti-friction coating, may lead to a localized overload of the anti-friction coating, for example, if anti-friction coating zones, whose position may not be influenced, occur in a high load bearing region. [0002]
    • SUMMARY OF THE INVENTION
  • The present invention is therefore based on the object of implementing a method of producing a workpiece having at least one bearing eye of the type initially described in such a way that, with a comparatively low production cost, a high dynamic bearing load capacity may be ensured without impairing the service life.[0003]
  • This object is achieved according to the present invention in that the bearing eye is processed for a precise fit to a circular cylinder before the anti-friction coating is applied to the processed bearing eye surface in a thickness corresponding to the final dimensions, the proportion of the softer alloy component in the deposited alloy being increased with increasing coating thickness. [0004]
  • Since, as a consequence of these measures, a precisely fit, circular cylindrical bearing eye surface may be assumed, the final dimension of the running surface formed by the anti-friction coating may be ensured using a thin-layered application of the anti-friction coating without reprocessing of the anti-friction coating, with the advantage that the anti-friction coating has a constructively predetermined thickness gradient, which represents an essential requirement for a high service life of friction bearings subjected to high dynamic loads, particularly since comparatively thin anti-friction coatings having a thickness of, for example, 20 to 40 μm are possible within narrow tolerance ranges, if no compensation of imprecisions via the anti-friction coating thickness is required. A further requirement for a high dynamic load capacity of such a friction bearing may be seen in the load capacity of the anti-friction coating itself, taking into consideration the running-in conditions, which require a comparatively soft running coating. In order to be able to meet these partially contradictory requirements, the anti-friction coating, which is typically made of an alloy of harder and softer alloy components, is deposited on the bearing eye surface in such a way that with increasing coating thickness, the proportion of the softer alloy component in the deposited alloy is increased, so that the hardness of the anti-friction coating increases from the running surface toward the bearing eye surface. This means that in spite of good running-in conditions, a sufficient support effect to meet high dynamic loads of the friction bearing may also be applied via the anti-friction coating. [0005]
  • Such anti-friction coatings may be applied physically in vacuum with the necessary precision due to the restricted coating thickness. The coating outlay may be simplified in relation to this application method by a galvanic deposition of the anti-friction coating on the bearing eye surface, however. The strength of the electrical field used for the depositing procedure merely has to be changed during the galvanic deposition procedure as a function of the desired increase of the proportion of the softer alloy component. This means, for example, for an anti-friction coating based on a copper-lead alloy, that the current density must be increased during the depositing procedure from an initial 3 A/dm[0006] 2 to 10 A/dm2, in order to elevate the proportion of lead in the deposited coating using the higher current density. The hardness gradient over the thickness of the anti-friction coating thus achieved may be controlled in accordance with the particular requirements via the current density.
  • During coating of a workpiece having a divided bearing eye, the bearing eye surface is processed for a precise fit after assembly of the divided bearing eye and then galvanically coated with the anti-friction coating, before the anti-friction coating is divided in accordance with the division of the bearing eye through a fracture separation. Since, after the assembly of the divided bearing eye, the processing of the bearing eye for a precise fit is performed in order to provide the requirements for a tailored coating which ensures the final dimensions without reprocessing, it must merely be ensured, after the thin-layered application of the anti-friction coating, that the anti-friction coating applied is divided corresponding to the division of the bearing eye, which is advantageously performed through a fracture separation. The comparatively low coating thickness and the good adhesion of the galvanically deposited anti-friction coating on the bearing eye surface represent advantageous conditions for a fracture separation without problems. [0007]

Claims (3)

1. A method of producing a workpiece having at least one bearing eye, the bearing eye being coated with an anti-friction coating made of an alloy of a harder alloy component and a softer alloy component,
characterized in that the bearing eye is processed for a precise fit to a circular cylinder before the anti-friction coating is applied to the processed bearing eye surface in a thickness corresponding to the final dimensions, the proportion of the softer alloy component in the deposited alloy being increased with increasing coating thickness.
2. The method according to claim 1,
characterized in that the anti-friction coating is galvanically deposited on the processed bearing eye surface and, during the galvanic depositing procedure, the strength of the electrical field used for the depositing procedure is varied as a function of the desired increase of the proportion of the softer alloy component.
3. The method according to claim 1 or 2,
characterized in that, for a workpiece having a divided bearing eye, the bearing eye surface is processed for a precise fit after the assembly of the divided bearing eye and then galvanically coated with the anti-friction coating, before the anti-friction coating is divided in accordance with the division of the bearing eye by a fracture separation.
US10/678,665 2002-10-04 2003-10-03 Method of producing a workpiece having at least one bearing eye Abandoned US20040064948A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA1506/2002 2002-10-04
AT0150602A AT412556B (en) 2002-10-04 2002-10-04 METHOD FOR MANUFACTURING AT LEAST ONE LAGERAUGEWICHEN WORKPIECE

Publications (1)

Publication Number Publication Date
US20040064948A1 true US20040064948A1 (en) 2004-04-08

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ID=31999990

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US10/678,665 Abandoned US20040064948A1 (en) 2002-10-04 2003-10-03 Method of producing a workpiece having at least one bearing eye

Country Status (3)

Country Link
US (1) US20040064948A1 (en)
AT (1) AT412556B (en)
DE (1) DE10344720B4 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2015204340A1 (en) * 2014-09-26 2016-04-14 Honda Motor Co., Ltd. Connecting rod for internal combustion engine

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2187755A (en) * 1936-12-11 1940-01-23 United Aircraft Corp Method of forming bearings
US2734024A (en) * 1956-02-07 Method of making bearings
US4508396A (en) * 1981-05-22 1985-04-02 Hitachi, Ltd. Method of producing bearing component
US5156729A (en) * 1988-11-01 1992-10-20 Metal Leve, S.A. Method of making a plain bearing sliding layer
US5551782A (en) * 1993-02-08 1996-09-03 Sintermetallwerk Krebsoge Gmbh Component having at least one split bearing seat and method of producing same
US6312579B1 (en) * 1999-11-04 2001-11-06 Federal-Mogul World Wide, Inc. Bearing having multilayer overlay and method of manufacture
US6537683B1 (en) * 1998-11-13 2003-03-25 Federal-Mogul Wiesbaden Gmbh & Co. Kg Stratified composite material for sliding elements and method for the production thereof
US6735868B2 (en) * 2001-09-07 2004-05-18 Aktiebolaget Skf Surface treatment method
US6854183B2 (en) * 2001-10-08 2005-02-15 Federal-Mogul World Wide, Inc. Lead-free bearing
US6942389B2 (en) * 2002-10-03 2005-09-13 Federal-Mogul World Wide, Inc. Engine bearing
US7178238B2 (en) * 2002-10-04 2007-02-20 Miba Gleitlager Gmbh Method of producing a workpiece having at least one bearing eye
US7181842B2 (en) * 2002-10-04 2007-02-27 Miba Gleitlager Gmbh Method of producing a workpiece forming at least one bearing eye
US7217035B2 (en) * 2001-07-05 2007-05-15 Federal-Mogul Wiesbaden Gmbh & Co. Kg Connecting rod-bearing combination for adjusting and reducing oscillating masses of a connecting rod-piston-combination and method for producing a connecting rod-bearing combination of this type

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4211881C2 (en) * 1992-04-09 1994-07-28 Wmv Ag Process for the electrochemical application of a structured surface coating
JP4444491B2 (en) * 1997-07-28 2010-03-31 フオルクスワーゲン・アクチエンゲゼルシヤフト Connecting rod with fixed sliding bearing layer
DE19955297C1 (en) * 1999-11-17 2001-04-26 Ks Gleitlager Gmbh Galvanically deposited bearing lead alloy contains alloying additions of tin, antimony and copper

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2734024A (en) * 1956-02-07 Method of making bearings
US2187755A (en) * 1936-12-11 1940-01-23 United Aircraft Corp Method of forming bearings
US4508396A (en) * 1981-05-22 1985-04-02 Hitachi, Ltd. Method of producing bearing component
US5156729A (en) * 1988-11-01 1992-10-20 Metal Leve, S.A. Method of making a plain bearing sliding layer
US5551782A (en) * 1993-02-08 1996-09-03 Sintermetallwerk Krebsoge Gmbh Component having at least one split bearing seat and method of producing same
US6537683B1 (en) * 1998-11-13 2003-03-25 Federal-Mogul Wiesbaden Gmbh & Co. Kg Stratified composite material for sliding elements and method for the production thereof
US6312579B1 (en) * 1999-11-04 2001-11-06 Federal-Mogul World Wide, Inc. Bearing having multilayer overlay and method of manufacture
US7217035B2 (en) * 2001-07-05 2007-05-15 Federal-Mogul Wiesbaden Gmbh & Co. Kg Connecting rod-bearing combination for adjusting and reducing oscillating masses of a connecting rod-piston-combination and method for producing a connecting rod-bearing combination of this type
US6735868B2 (en) * 2001-09-07 2004-05-18 Aktiebolaget Skf Surface treatment method
US6854183B2 (en) * 2001-10-08 2005-02-15 Federal-Mogul World Wide, Inc. Lead-free bearing
US6942389B2 (en) * 2002-10-03 2005-09-13 Federal-Mogul World Wide, Inc. Engine bearing
US7222425B2 (en) * 2002-10-03 2007-05-29 Federal-Mogul World Wide, Inc. Method of forming engine bearing
US7178238B2 (en) * 2002-10-04 2007-02-20 Miba Gleitlager Gmbh Method of producing a workpiece having at least one bearing eye
US7181842B2 (en) * 2002-10-04 2007-02-27 Miba Gleitlager Gmbh Method of producing a workpiece forming at least one bearing eye

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2015204340A1 (en) * 2014-09-26 2016-04-14 Honda Motor Co., Ltd. Connecting rod for internal combustion engine
AU2015204340B2 (en) * 2014-09-26 2016-11-17 Honda Motor Co., Ltd. Connecting rod for internal combustion engine

Also Published As

Publication number Publication date
AT412556B (en) 2005-04-25
ATA15062002A (en) 2004-09-15
DE10344720A1 (en) 2004-04-15
DE10344720B4 (en) 2007-11-29

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Legal Events

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AS Assignment

Owner name: MIBA GLEITLAGER GMBH, AUSTRIA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:RUMPF, THOMAS;SCHNEIDERBAUER, ELISABETH;SPIESSBERGER, HELMUT;REEL/FRAME:014590/0414

Effective date: 20030829

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION