EP1282783A1 - Method for finishing the surface of a rolling contact component - Google Patents

Method for finishing the surface of a rolling contact component

Info

Publication number
EP1282783A1
EP1282783A1 EP01919994A EP01919994A EP1282783A1 EP 1282783 A1 EP1282783 A1 EP 1282783A1 EP 01919994 A EP01919994 A EP 01919994A EP 01919994 A EP01919994 A EP 01919994A EP 1282783 A1 EP1282783 A1 EP 1282783A1
Authority
EP
European Patent Office
Prior art keywords
calendering
ball
burnishing
contact component
rolling contact
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Withdrawn
Application number
EP01919994A
Other languages
German (de)
French (fr)
Inventor
Pieter Martin Lugt
John Howard Tripp
Rinke Vos
Ralph Cornelis Petrus Meeuwenoord
Armin Herbert Emil August Olschewski
Antonio Gabelli
John Michael Beswick
Arend Pieter Voskamp
Aidan Michael Kerrigan
Alexander Jan Carel De Vries
Johannes Cornelis Kuijpers
Eustathios Ioannides
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.)
SKF Engineering and Research Centre BV
Original Assignee
SKF Engineering and Research Centre BV
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 SKF Engineering and Research Centre BV filed Critical SKF Engineering and Research Centre BV
Publication of EP1282783A1 publication Critical patent/EP1282783A1/en
Withdrawn legal-status Critical Current

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
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller 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
    • F16C33/58—Raceways; Race rings
    • F16C33/64—Special methods of manufacture
    • 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
    • F16C2240/00—Specified values or numerical ranges of parameters; Relations between them
    • F16C2240/12—Force, load, stress, pressure
    • F16C2240/18—Stress
    • 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
    • F16C2240/00—Specified values or numerical ranges of parameters; Relations between them
    • F16C2240/40—Linear dimensions, e.g. length, radius, thickness, gap
    • 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
    • F16C2240/00—Specified values or numerical ranges of parameters; Relations between them
    • F16C2240/40—Linear dimensions, e.g. length, radius, thickness, gap
    • F16C2240/42—Groove sizes
    • 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
    • Y10T29/47—Burnishing

Definitions

  • the invention is related to the field of finishing the surface of a rolling contact component.
  • a rolling contact component can form part of a rolling element bearing, e.g. a bearing ring or a ball-type or roller-type rolling element.
  • components which form part of a rolling traction drive are encompassed, e.g. the power rollers and discs of an infinitively or continuously variable transmission.
  • a proportioning and strengthening of the surface in question is obtained by means of a ball calendering (burnishing) tool which plastically deforms the roughness peaks which are left behind after a hard turning or rough grinding operation.
  • the tool comprises a holder at the tip of which a ball is usually rotatably supported by means of a pressure fluid.
  • the calendering ball has a diameter of 2 mm to 13 mm.
  • a method of this type for manufacturing a traction drive rolling element has been disclosed in Japanese patent application JP-A-9137854. According to this prior art method, a surface pressures of 7 GPa or higher is applied. As a result, compressive residual stresses are obtained beneath the surface thus treated which lead to an increase of the rolling fatigue resistance and which would prevent the surface layers from flaking off. The method in question is claimed to generate compressive stresses of about 1.5 GPa at a depth of 0.1 - 0.2 mm beneath the surface.
  • the object of the present invention is therefore to provide a method for finishing a surface of a rolling contact component which combines excellent tribological propertied with a long contact fatigue life, good scuffing resistance and a good ability to build up a lubricant film.
  • a method for finishing the surface of a rolling contact component such as a bearing rolling element, a bearing ring or a traction drive rolling element, comprising the steps of: carrying out a cutting operation on the surface, - subsequently calendering or burnishing the surface by means of a ball comprising a material harder than the rolling contact component material whereby the maximum calendering or burnishing pressure exerted on the surface is less than 7 GPa.
  • the calendering or burnishing pressure By controlling the calendering or burnishing pressure at values less than 7 GPa, first of all the desired pattern or texture of flattened areas or lands is obtained, which areas are separated from each other by grooves. The flattened areas have the same height, which results in a balanced load sharing ability.
  • the limitation of the calendering pressure provides reduced residual surface and sub-surface compressive stresses, which leads to an extended life.
  • compressive stresses are generated at and/or beneath the surface, which compressive stresses do not exceed 1 GPa absolute.
  • the compressive stresses do not exceed 0.8 GPa absolute. Since the surface of the component in question has been overrolled and thereby plastically deformed, it can be expected that the running in takes place already at the manufacturing stage. The bearing therefore does not require running in.
  • the process in question can be carried out in a quick and cost-effective manner by combining the (hard) cutting operation and the calendering operation in a single pass turning process.
  • the calendering ball may either be of a rolling type or of a sliding type. Furthermore, specific surface portions may be exposed to the calendering or burnishing pressure for more than one time.
  • Figure 1 shows a state of the art surface obtained by grinding.
  • Figure 2 shows a surface obtained according to the method of the invention.
  • the surface shown in figure 1, e.g. of a bearing ring or power roller, has been obtained by a cutting operation and subsequent grinding.
  • the surface has a regular pattern of grooves 2 and ridges 1 , providing ISO reference of R A 0.2 ⁇ m.
  • the roughness R A in general is 0.27 whereas the roughness on the areas (which need not to be fully flat) is R A 0.1 microns.
  • the surface and sub-surface residual compresses stresses are less than 0.8 GPa.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Rolling Contact Bearings (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Abstract

A method for finishing the surface of a rolling contact component, such as a bearing rolling element, a bearing ring or a traction drive rolling element, comprises the steps of: carrying out a cutting operation on the surface, subsequently calendering or burnishing the surface by means of a ball comprising a material harder than the bearing component material whereby the maximum calendering or burnishing pressure exerted on the surface is less than 7 Gpa.

Description

Method for finishing the surface of a rolling contact component
The invention is related to the field of finishing the surface of a rolling contact component. Such component can form part of a rolling element bearing, e.g. a bearing ring or a ball-type or roller-type rolling element. Also components which form part of a rolling traction drive are encompassed, e.g. the power rollers and discs of an infinitively or continuously variable transmission.
In the finishing process a proportioning and strengthening of the surface in question is obtained by means of a ball calendering (burnishing) tool which plastically deforms the roughness peaks which are left behind after a hard turning or rough grinding operation. The tool comprises a holder at the tip of which a ball is usually rotatably supported by means of a pressure fluid. Typically, the calendering ball has a diameter of 2 mm to 13 mm.
As a result of the calendering or burnishing operation, the roughness peaks are plastically deformed, leading to a surface which typically has smooth material areas of equal height. A surface texture like this, that is with areas of about the same height, separated by grooves, is not fully smooth and is therefore suitable for the envisaged applications mentioned before, e.g. rolling element, power rollers etc.
A method of this type for manufacturing a traction drive rolling element has been disclosed in Japanese patent application JP-A-9137854. According to this prior art method, a surface pressures of 7 GPa or higher is applied. As a result, compressive residual stresses are obtained beneath the surface thus treated which lead to an increase of the rolling fatigue resistance and which would prevent the surface layers from flaking off. The method in question is claimed to generate compressive stresses of about 1.5 GPa at a depth of 0.1 - 0.2 mm beneath the surface.
Under specific conditions however, it appears that, despite the improved resistance against flaking, a decrease in life was obtained. Thus, the method should be adapted in such a way that this negative effect does not occur.
The object of the present invention is therefore to provide a method for finishing a surface of a rolling contact component which combines excellent tribological propertied with a long contact fatigue life, good scuffing resistance and a good ability to build up a lubricant film. This object is achieved by a method for finishing the surface of a rolling contact component, such as a bearing rolling element, a bearing ring or a traction drive rolling element, comprising the steps of: carrying out a cutting operation on the surface, - subsequently calendering or burnishing the surface by means of a ball comprising a material harder than the rolling contact component material whereby the maximum calendering or burnishing pressure exerted on the surface is less than 7 GPa.
By controlling the calendering or burnishing pressure at values less than 7 GPa, first of all the desired pattern or texture of flattened areas or lands is obtained, which areas are separated from each other by grooves. The flattened areas have the same height, which results in a balanced load sharing ability. On the other hand, the limitation of the calendering pressure provides reduced residual surface and sub-surface compressive stresses, which leads to an extended life.
Preferably, compressive stresses are generated at and/or beneath the surface, which compressive stresses do not exceed 1 GPa absolute.
Most preferably, the compressive stresses do not exceed 0.8 GPa absolute. Since the surface of the component in question has been overrolled and thereby plastically deformed, it can be expected that the running in takes place already at the manufacturing stage. The bearing therefore does not require running in. The process in question can be carried out in a quick and cost-effective manner by combining the (hard) cutting operation and the calendering operation in a single pass turning process.
The calendering ball may either be of a rolling type or of a sliding type. Furthermore, specific surface portions may be exposed to the calendering or burnishing pressure for more than one time.
This can be achieved by selecting the advancement speed of the tool which carries the calendering ball in such a way in relation to the turning rotation speed of the object that each spot on the surface is more than one time, e.g. five times, contacted by said ball. The invention will describe further with reference to the figures.
Figure 1 shows a state of the art surface obtained by grinding. Figure 2 shows a surface obtained according to the method of the invention. The surface shown in figure 1, e.g. of a bearing ring or power roller, has been obtained by a cutting operation and subsequent grinding.
The surface has a regular pattern of grooves 2 and ridges 1 , providing ISO reference of RA 0.2μm. The surface as shown in figure 2, obtained by a hard cutting operation and subsequent calendering or burnishing, comprises grooves 3 between areas 4. The roughness RA in general is 0.27 whereas the roughness on the areas (which need not to be fully flat) is RA 0.1 microns.
It is of importance that the areas 4 all have the same height, whereby a perfect load sharing ability is obtained. As a result, the fatigue life is almost equal to that of very smooth surfaces.
According to the invention, the surface and sub-surface residual compresses stresses are less than 0.8 GPa.

Claims

Claims
1. Method for finishing the surface of a rolling contact component, such as a bearing rolling element, a bearing ring or a traction drive rolling element, comprising the steps of: carrying out a cutting operation on the surface, subsequently calendering or burnishing the surface by means of a ball comprising a material harder than the rolling contact component material whereby the maximum calendering or burnishing pressure exerted on the surface is less than 7 GPa.
2. Method according to claim 1, wherein compressive stresses are generated at and/or beneath the surface, which compressive stresses do not exceed 1 GPa absolute.
3. Method according to claim 2, wherein the compressive stresses do not exceed 0.8 GPa absolute.
4. Method according to claims 1, 2 or 3, wherein a hard cutting operation is carried out on the surface before the calendering or burnishing operation.
5. Method according to any of claims 1 - 4, wherein the cutting operation and the calendering or burnishing operation are carried out in a single pass turning process.
6. Method according to any of the preceding claims, wherein the calendering or burnishing operation is carried out by means of a ball comprising a material harder than the rolling contact component material.
7. Method according to claim 6, wherein the ball is rolled over the surface.
8. Method according to claim 6, wherein the ball is slid over the surface, a high traction fluid being provided for increasing the sliding force between said ball and surface.
9. Method according to any of the preceding claims, wherein specific surface portions are exposed to the calendering or burnishing pressure each more than one time.
10. Method according to claim 9, wherein the ball is rolled over the surface maximally five times.
EP01919994A 2000-03-22 2001-03-22 Method for finishing the surface of a rolling contact component Withdrawn EP1282783A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
NL1014723A NL1014723C2 (en) 2000-03-22 2000-03-22 Method for finishing the surface of a rolling contact component.
NL1014723 2000-03-22
PCT/NL2001/000235 WO2001071208A1 (en) 2000-03-22 2001-03-22 Method for finishing the surface of a rolling contact component

Publications (1)

Publication Number Publication Date
EP1282783A1 true EP1282783A1 (en) 2003-02-12

Family

ID=19771056

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01919994A Withdrawn EP1282783A1 (en) 2000-03-22 2001-03-22 Method for finishing the surface of a rolling contact component

Country Status (8)

Country Link
US (1) US20030176152A1 (en)
EP (1) EP1282783A1 (en)
JP (1) JP2003528272A (en)
KR (1) KR20020082897A (en)
CN (1) CN1418292A (en)
AU (1) AU2001246940A1 (en)
NL (1) NL1014723C2 (en)
WO (1) WO2001071208A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1023342C2 (en) * 2003-05-05 2004-11-09 Skf Ab Method for treating the surface of a machine element.
SE525303C2 (en) * 2003-10-14 2005-01-25 Skf Ab Roll contact surface improvement method, especially for roller bearings, comprises vibrating hard turning tool during surface turning
US8752271B2 (en) 2004-07-30 2014-06-17 Acushnet Company Golf club groove configuration
JP4947884B2 (en) * 2004-08-20 2012-06-06 住友重機械工業株式会社 Method for manufacturing pin of planetary rotating member of planetary reduction mechanism
US8152687B2 (en) 2007-01-24 2012-04-10 Torotrack (Development) Limited Powdered metal variator components
JP7073193B2 (en) * 2017-11-24 2022-05-23 Ntn株式会社 Rolling parts, bearings and their manufacturing methods

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2431654A (en) * 1944-11-03 1947-11-25 George W White Stock cutting and burnishing tool
US3049788A (en) * 1960-02-26 1962-08-21 Omega Ind Inc Method and apparatus for finishing surfaces
US4299017A (en) * 1979-05-11 1981-11-10 W. Hegenscheidt Gesellschaft Mbh Apparatus for smooth rolling the bearing seats of crankshafts
US4554811A (en) * 1983-08-04 1985-11-26 Toyoda Koki Kabushiki Kaisha Crankpin rolling apparatus
JP2508178B2 (en) * 1988-02-29 1996-06-19 日本精工株式会社 Rolling bearing and manufacturing method thereof
JP3440657B2 (en) 1995-11-15 2003-08-25 日産自動車株式会社 Finishing method of traction drive rolling element surface
DE19628825A1 (en) * 1996-07-17 1998-01-22 Fag Aircraft Gmbh Roller bearing for use in air and space travel applications
US5826453A (en) * 1996-12-05 1998-10-27 Lambda Research, Inc. Burnishing method and apparatus for providing a layer of compressive residual stress in the surface of a workpiece
US6415486B1 (en) * 2000-03-01 2002-07-09 Surface Technology Holdings, Ltd. Method and apparatus for providing a residual stress distribution in the surface of a part
US6622570B1 (en) * 2000-03-01 2003-09-23 Surface Technology Holdings Ltd. Method for reducing tensile stress zones in the surface of a part

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0171208A1 *

Also Published As

Publication number Publication date
KR20020082897A (en) 2002-10-31
WO2001071208A1 (en) 2001-09-27
AU2001246940A1 (en) 2001-10-03
US20030176152A1 (en) 2003-09-18
NL1014723C2 (en) 2001-09-25
JP2003528272A (en) 2003-09-24
CN1418292A (en) 2003-05-14

Similar Documents

Publication Publication Date Title
Fox et al. Hard lubricating coatings for cutting and forming tools and mechanical components
US7134939B2 (en) Method for reducing wear of mechanically interacting surfaces
US8859078B2 (en) Friction piece in a lubricated medium, working at contact pressures higher than 200 MPa
EP1620230B1 (en) Method for treating the surface of a machine element
CN1300352A (en) Coated rolling element bearing
Yeldose et al. An investigation into the high performance of TiN-coated rollers in burnishing process
JP4520811B2 (en) Method for forming improved rolling contact surface
US20030176152A1 (en) Method for finishing the surface of a rolling contact component
WO2004033757A3 (en) Tool with wear resistant low friction coating and method of making the same
Franzen et al. Finishing of thermally sprayed tool coatings for sheet metal forming operations by roller burnishing
CN111094776B (en) Method for manufacturing a bearing component and bearing component
JP4487530B2 (en) Roller bearing cage and manufacturing method thereof
WO2009114720A2 (en) Texturing of the bearing surface for a roller cone rock bit
JP3440657B2 (en) Finishing method of traction drive rolling element surface
US11231079B2 (en) Ferrous workpiece and method of manufacture
JP2004011793A (en) Linear guide
JP2009243619A (en) Rolling slide member and bearing for steel pipe forming roll
JP2004116766A (en) Method of manufacturing rolling sliding member, rolling sliding member obtained by the method and anti-friction bearing using the same
US6986606B2 (en) Ball bearing and lubricating method thereof
JP2002168256A (en) Rolling bearing and manufacturing method therefor
Bang-zhong et al. Research on surface characteristics of non-traditional finishing
JP2965441B2 (en) Follower bearing
JP4186626B2 (en) Manufacturing method of rolling sliding member
JP4284956B2 (en) Manufacturing method of rolling sliding member
Over et al. Friction: the ubiquitous coefficient can it be controlled?

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

17P Request for examination filed

Effective date: 20020910

AK Designated contracting states

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

AX Request for extension of the european patent

Extension state: AL LT LV MK RO SI

RBV Designated contracting states (corrected)

Designated state(s): DE FR GB IT

17Q First examination report despatched

Effective date: 20050511

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: 20050922