WO2006020346A1 - High carbon steel formed bearing assembly - Google Patents
High carbon steel formed bearing assembly Download PDFInfo
- Publication number
- WO2006020346A1 WO2006020346A1 PCT/US2005/026005 US2005026005W WO2006020346A1 WO 2006020346 A1 WO2006020346 A1 WO 2006020346A1 US 2005026005 W US2005026005 W US 2005026005W WO 2006020346 A1 WO2006020346 A1 WO 2006020346A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- shell
- cold
- forming
- rolled strip
- circumferential raceway
- Prior art date
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
- F16C19/46—Needle bearings with one row or 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
-
- 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
- F16C21/00—Combinations of sliding-contact bearings with ball or roller bearings, for exclusively rotary movement
- F16C21/005—Combinations of sliding-contact bearings with ball or roller bearings, for exclusively rotary movement the external zone of a bearing with rolling members, e.g. needles, being cup-shaped, with or without a separate thrust-bearing disc or ring, e.g. for universal joints
-
- 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
- F16C2204/00—Metallic materials; Alloys
- F16C2204/60—Ferrous alloys, e.g. steel alloys
- F16C2204/66—High carbon steel, i.e. carbon content above 0.8 wt%, e.g. through-hardenable steel
-
- 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
- F16C2361/00—Apparatus or articles in engineering in general
- F16C2361/41—Couplings
-
- 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
- Y10T29/49643—Rotary bearing
- Y10T29/49679—Anti-friction bearing or component thereof
- Y10T29/49682—Assembling of race and rolling anti-friction members
- Y10T29/49684—Assembling of race and rolling anti-friction members with race making
-
- 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
- Y10T29/49643—Rotary bearing
- Y10T29/49679—Anti-friction bearing or component thereof
- Y10T29/49689—Race making
-
- 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
- Y10T29/49709—Specific metallic composition
Definitions
- This invention relates to roller bearings with a roller race made from flat sheet metal.
- this invention relates to a roller bearing of the type including a roller race made
- One method of making a roller bearing is to form a race with end flanges from flat sheet
- the sheet metal is subjected to a forming process to form the flat stock into a shell 12 which is closed or flanged at one end 14 and open at the opposite end 16. Examples of the forming
- Fig. 1 is an illustrative forming process in which the flat sheet metal is drawn or formed between male and female dies 17 and IS, respectively. The forming process can occur in a single operation or a sequence of forming operations.
- the roller bearing 10 has a number of internal components (not shown) installed within cylindrical shell 12. The open end 16 is then bent over during final assembly to retain the internal components.
- the open end 16 is bent over, and then later the internal components are installed to create the final assembly.
- the flat sheet metal used to form the shells has typically been made of low carbon steel
- a steel having a carbon content of less than 0.35 % for example, a steel having a carbon content of less than 0.35 %.
- the shell is subjected to a process to add carbon to the surface, for example, carburizing,
- carburizing includes
- U.S. Patent No. 6,682,227 discloses a bearing assembly manufactured from a cold-rolled
- the shell must be
- the present invention provides a roller bearing assembly and a method of forming a
- the bearing assembly includes a shell formed from a cold-rolled strip
- the formed shell has a circumferential raceway and a plurality of rolling elements are positioned in the shell.
- the circumferential raceway has an as hardened surface hardness of at least 58 HRC without carburizing of the formed shell.
- the cold-rolled strip has a carbon content greater than 0.65% and an ASTM grain size no. of 8 or finer.
- the circumferential raceway has a surface roughness Ra less than or equal to 18 microinchs without the application of any finishing process to the formed shell.
- the cold-rolled strip has a carbon content greater than 0.65% and a plain strain forming limit value (FLo) greater than or equal to 0.25.
- Fig. 1 is a plan view in partial cross-section showing a roller bearing shell that is a first embodiment of the present invention formed via an illustrative forming process.
- Fig. 2 is an isometric view of a formed bearing shell.
- Fig. 3 is a cross sectional view along the line 3-3 in Fig. 2.
- Fig. 4 is a cross sectional view similar to Fig. 3 showing the rolling elements positioned in the shell and the open end closed.
- Fig. 5 is a cross sectional view similar to Fig. 3 showing an alternative configuration of the shell.
- Fig. 6 is a sheet metal forming limit diagram (FLD) for an illustrative high carbon sheet
- the bearing assembly 10 includes a cylindrical shell 12 that is formed from a piece of flat stock.
- the shell 12 can have various configurations, for example, cylindrical, tapered, or a partial sphere, and is described herein as a cylinder for illustrative purposes only.
- the shell 12 is flanged at one end 14 and initially open at the opposite end 16.
- the shell 12' can have a closed end 14' opposite the open end 16. The closed end 14' maybe provided
- open end 16 often has a thinner cross section that is conventionally referred to as a lip 20.
- the shell is conventionally referred to as a lip 20.
- components may include a retainer cage to hold and guide the rolling elements, one or more seals,
- the lip 20 is bent, folded or otherwise turned to close the open end 16 of the shell 12.
- the lip 20 is bent, folded or otherwise turned to close the open end 16 of the shell 12
- the material preferably has a chemical composition of: % carbon 0.65-0.90; % manganese
- the preferred material also has an ASTM grain size no. of 8 or finer.
- ASTM grain size no. of 8 or finer For example, the inventors have produced the present bearing assembly 10 utilizing SAE-
- SAE- 1074 carbon steel strip stock to be preferable, other high carbon steels may be utilized. It is preferred that such high carbon steels have an ASTM grain size no. of 8 or finer and a plain strain forming limit value (FL 0 ) greater than or equal to 0.25. As indicated in Fig. 6, the inventors have found that a material of this nature has an anisotropy value R that is close to 1.0 without
- Roller bearing assemblies 10 manufactured using the preferred material provided a shell
- the shell 12 having very good concentricity and roundness.
- the shell 12 also has a heat treated bearing
- the formed shell 12 is typically tempered to increase the surface
- formed shell 12 also has a substantially uniform carbon content through the cross-section of the
- the formed shell 12 has a smooth surface
- the formed shell 12 will preferably have an average surface roughness Ra of less than 18 microinchs and preferably less than 8 microinchs without any
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Rolling Contact Bearings (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/912,818 | 2004-08-06 | ||
US10/912,818 US20060026838A1 (en) | 2004-08-06 | 2004-08-06 | High carbon steel formed bearing assembly |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006020346A1 true WO2006020346A1 (en) | 2006-02-23 |
Family
ID=34983822
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2005/026005 WO2006020346A1 (en) | 2004-08-06 | 2005-07-22 | High carbon steel formed bearing assembly |
Country Status (5)
Country | Link |
---|---|
US (1) | US20060026838A1 (en) |
DE (1) | DE102005036311A1 (en) |
FR (1) | FR2874067A1 (en) |
GB (1) | GB2416813A (en) |
WO (1) | WO2006020346A1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006050122A1 (en) * | 2006-10-25 | 2008-04-30 | Schaeffler Kg | Needle bearing has bearing ring, where bearing ring has hardened austenitic steel with total carbon and nitrogen content and needles roll on bearing surface of bearing ring |
DE102015212829A1 (en) * | 2015-07-09 | 2017-01-12 | Schaeffler Technologies AG & Co. KG | Cylindrical roller bearing and method for manufacturing a cylindrical roller bearing |
CN114350902B (en) * | 2021-12-23 | 2023-11-07 | 中国航发哈尔滨东安发动机有限公司 | Technological method for improving medium-small size thin-wall bushing seepage layer hardness consistency |
CN114908245B (en) * | 2022-05-11 | 2024-03-26 | 武汉理工大学 | Method for regulating and controlling forming and manufacturing of retained austenite of bearing with high fatigue durability and dimensional stability |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4553417A (en) * | 1981-04-16 | 1985-11-19 | Miracle Metals, Inc. | Implantation of certain solid lubricants into certain metallic surfaces by mechanical inclusion |
EP0458646A1 (en) * | 1990-05-23 | 1991-11-27 | Aichi Steel Works, Ltd. | Bearing steel |
EP0703375A2 (en) * | 1994-09-23 | 1996-03-27 | The Torrington Company | Two-piece thrust washer |
DE19711389A1 (en) * | 1997-03-19 | 1998-09-24 | Schaeffler Waelzlager Ohg | Method of assembling roller bearing |
GB2342409A (en) * | 1997-08-18 | 2000-04-12 | Nsk Ltd | Steel composition for a bearing |
US6162390A (en) * | 1997-04-04 | 2000-12-19 | Ascometal | Steel for bearings |
JP2002327213A (en) * | 2001-04-27 | 2002-11-15 | Nsk Ltd | Method for manufacturing rolling device |
US20030091256A1 (en) * | 2000-04-22 | 2003-05-15 | Karl-Ludwig Grell | Rolling bearing component |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1715268A (en) * | 1927-04-01 | 1929-05-28 | Gen Motors Corp | Method of making bearings |
DE3103343C2 (en) * | 1981-01-31 | 1985-01-17 | Skf Kugellagerfabriken Gmbh, 8720 Schweinfurt | Process for the non-cutting manufacture of a bearing sleeve provided with a bottom |
KR930010411B1 (en) * | 1988-07-11 | 1993-10-23 | 니혼 세이코오 가부시끼가이샤 | Rolling bearing |
GB2235212B (en) * | 1989-07-25 | 1993-08-11 | Nippon Seiko Kk | Rolling bearing |
US5135587A (en) * | 1991-04-01 | 1992-08-04 | Ford Motor Company | Machinable, strong, but crackable low ductility steel forging |
US5139583A (en) * | 1992-01-21 | 1992-08-18 | Kawasaki Steel Corporation | Graphite precipitated hot-rolled steel plate having excellent bending workability and hardenability and method therefor |
JP3303176B2 (en) * | 1993-12-27 | 2002-07-15 | 光洋精工株式会社 | Bearing parts |
US6855214B2 (en) * | 1995-12-29 | 2005-02-15 | Rikuro Obara | Anti-friction bearing |
JPH09310153A (en) * | 1996-05-16 | 1997-12-02 | Sanyo Special Steel Co Ltd | Steel for bearing excellent in cold forgeability |
JPH11101247A (en) * | 1997-09-29 | 1999-04-13 | Ntn Corp | Rolling bearing part |
CA2272730C (en) * | 1998-05-26 | 2004-07-27 | Kabushiki Kaisha Kobe Seiko Sho | .alpha. + .beta. type titanium alloy, a titanium alloy strip, coil-rolling process of titanium alloy, and process for producing a cold-rolled titanium alloy strip |
US6419398B1 (en) * | 1998-07-30 | 2002-07-16 | The Torrington Company | Double wall bearing cup |
NL1014946C2 (en) * | 2000-04-13 | 2001-10-16 | Skf Eng & Res Centre Bv | Method for manufacturing a part of a rolling bearing. |
US6440237B1 (en) * | 2000-05-23 | 2002-08-27 | Delphi Technologies, Inc. | Process for forming cold formed high-load bearing steel parts |
US6673171B2 (en) * | 2000-09-01 | 2004-01-06 | United States Steel Corporation | Medium carbon steel sheet and strip having enhanced uniform elongation and method for production thereof |
US7438477B2 (en) * | 2001-11-29 | 2008-10-21 | Ntn Corporation | Bearing part, heat treatment method thereof, and rolling bearing |
DE10247372A1 (en) * | 2002-10-10 | 2004-04-22 | Rexroth Star Gmbh | Production of a hardened steel component comprises forming a semi-finished product made from air-hardened steel, cold forming the product to form the finished molded component, and hardening the component by heat treating |
WO2005078297A1 (en) * | 2004-02-12 | 2005-08-25 | Ntn Corporation | Shell type needle roller bearing, support structure of compressor spindle, and support structure of piston pump drive part |
-
2004
- 2004-08-06 US US10/912,818 patent/US20060026838A1/en not_active Abandoned
-
2005
- 2005-07-22 WO PCT/US2005/026005 patent/WO2006020346A1/en active Application Filing
- 2005-08-01 GB GB0515738A patent/GB2416813A/en not_active Withdrawn
- 2005-08-02 DE DE102005036311A patent/DE102005036311A1/en not_active Withdrawn
- 2005-08-05 FR FR0508372A patent/FR2874067A1/en not_active Withdrawn
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4553417A (en) * | 1981-04-16 | 1985-11-19 | Miracle Metals, Inc. | Implantation of certain solid lubricants into certain metallic surfaces by mechanical inclusion |
EP0458646A1 (en) * | 1990-05-23 | 1991-11-27 | Aichi Steel Works, Ltd. | Bearing steel |
EP0703375A2 (en) * | 1994-09-23 | 1996-03-27 | The Torrington Company | Two-piece thrust washer |
DE19711389A1 (en) * | 1997-03-19 | 1998-09-24 | Schaeffler Waelzlager Ohg | Method of assembling roller bearing |
US6162390A (en) * | 1997-04-04 | 2000-12-19 | Ascometal | Steel for bearings |
GB2342409A (en) * | 1997-08-18 | 2000-04-12 | Nsk Ltd | Steel composition for a bearing |
US20030091256A1 (en) * | 2000-04-22 | 2003-05-15 | Karl-Ludwig Grell | Rolling bearing component |
JP2002327213A (en) * | 2001-04-27 | 2002-11-15 | Nsk Ltd | Method for manufacturing rolling device |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 2003, no. 03 5 May 2003 (2003-05-05) * |
Also Published As
Publication number | Publication date |
---|---|
FR2874067A1 (en) | 2006-02-10 |
DE102005036311A1 (en) | 2006-03-09 |
GB2416813A (en) | 2006-02-08 |
GB0515738D0 (en) | 2005-09-07 |
US20060026838A1 (en) | 2006-02-09 |
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