CZ2007845A3 - Process for producing bearing rings by flaring intermediate products from bearing steel with pipe-expanding machine - Google Patents

Process for producing bearing rings by flaring intermediate products from bearing steel with pipe-expanding machine Download PDF

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Publication number
CZ2007845A3
CZ2007845A3 CZ20070845A CZ2007845A CZ2007845A3 CZ 2007845 A3 CZ2007845 A3 CZ 2007845A3 CZ 20070845 A CZ20070845 A CZ 20070845A CZ 2007845 A CZ2007845 A CZ 2007845A CZ 2007845 A3 CZ2007845 A3 CZ 2007845A3
Authority
CZ
Czechia
Prior art keywords
rolling
bearing
rings
forging
temperature
Prior art date
Application number
CZ20070845A
Other languages
Czech (cs)
Inventor
Karhánek@Jaroslav
Otoupalík@Jan
Original Assignee
Zkl Brno, A. S.
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 Zkl Brno, A. S. filed Critical Zkl Brno, A. S.
Priority to CZ20070845A priority Critical patent/CZ2007845A3/en
Publication of CZ2007845A3 publication Critical patent/CZ2007845A3/en

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21HMAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H1/00Making articles shaped as bodies of revolution
    • B21H1/06Making articles shaped as bodies of revolution rings of restricted axial length
    • B21H1/12Making articles shaped as bodies of revolution rings of restricted axial length rings for ball or roller bearings
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30Parts of ball or roller bearings
    • F16C33/58Raceways; Race rings
    • F16C33/64Special methods of manufacture
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00Metal working
    • Y10T29/49Method of mechanical manufacture
    • Y10T29/49636Process for making bearing or component thereof
    • Y10T29/49643Rotary bearing
    • Y10T29/49679Anti-friction bearing or component thereof
    • Y10T29/49691Cage making

Abstract

In the process of producing bearing rings by rolling a bearing steel blank through a rolling machine, the preform is heated to a temperature in the range of 600 degC to 800 degC, in particular 700 degC to 720 degC, and rolled as semi-finished products. forgings forged by forging or die forging, turned rings or thick-walled pipes.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing by rolling a stock from a bearing bearing ring of steel with a rolling machine.

BACKGROUND OF THE INVENTION

Up to now, bearing rings have been produced most frequently by rolling and, in this method, basically either by hot rolling at a forging temperature or by cold rolling.

Hot rolling is based on preforms, forgings are forged either by free forging or die forging. Forges that produce bearing rings are mostly equipped with rolling machines of different types from different manufacturers. The rolling of the rings takes place at a forging temperature above 850 ° C, which is typically 1050 ° C - 850 ° C for bearing steel.

The disadvantage of this technology is especially the size of allowances and tolerances, which must cover inaccuracy of production, shrinkage, decarburization, surface defects caused not only during rolling, but also during forging, higher energy consumption spent on heating for forging when furnaces are set to 1100 ° C, Significant thermal stress on tool and machine, less shape and dimensional accuracy, less use of material and in many cases less * «·« ν ·

suitable fiber course, which is broken during subsequent machining.

Cold-rolling at temperatures below 400 ° C is a relatively new technology in which the material is formed, i.e., rolled, at ambient or low ambient temperatures. Rolling is performed on a special rolling machine.

The blank is a turned ring of suitable shape.

Cold rolling then allows considerably fewer additions, increasing material utilization. Rolls of more precise dimensions with the shape and also substantially very close to the shape of the machined ring, so that the

The cold rolling of the fibers is very stressing the bearing ring.

also to strengthen the material.

However, a disadvantage is that the feedstock must have a uniform structure suitable for cold forming.

The material must be soft annealed with a delay at the annealing temperature.

Cold rolling is also the stress of the machine, which results from the greater required forming force and greater deformation work.

This, in turn, places higher demands on the quality of the tools, which have to accommodate the larger forming forces.

The material exhibits embedded non-uniform deformation stress, which during further operations, especially hardening, increases the dimensional deformation of the ring and causes, among other things, ovality.

SUMMARY OF THE INVENTION It is an object of the present invention to overcome the aforementioned drawbacks of the known methods of rolling the bearing rings and in particular to achieve lower deformation work, lower energy consumption,

- 3 · «···· Higher material utilization, lower spacers weight, longer tool life and the possibility of applying smaller allowances and tolerances or processing larger rings

SUMMARY OF THE INVENTION

This object is solved and the drawbacks of the known methods of rolling the bearing rings largely eliminate the method of producing bearing rings by rolling the bearing steel blanks with a rolling machine according to the invention, which is characterized in that the blanks are heated to 600 ° C to 800 ° C Deň: 32 ° C.

It is particularly preferred that the preform is heated to a temperature in the range of 700 ° C to 720 ° C prior to rolling.

Forgings can be rolled forgings forged by free forging or die forging, or turned rings or thick-walled tubes.

The advantage of the method according to the invention is in particular that the energy consumption is lower than that of the forging, lower deformation work against cold-rolling, higher material utilization, lower weight of the cold-rolling bars, higher tool life and the possibility of applying lower allowances and tolerances compared to forging treatment. Scaling and decarburization are minimal and have no practical effect on machining allowances. The solution makes it possible to process larger rings compared to cold rolling.

DETAILED DESCRIPTION OF THE INVENTION

According to the invention, a technology for the production of rollers is proposed. of the bearing rings behind the “semi-heat”. The proposed technology practically exploits the advantages of both of these technologies described in the prior art and suppresses their disadvantages.

The principle is that the rolling process takes place at a temperature in the range of 600 to 800 ° C. A temperature range of 700-720 ° C is particularly preferred. Semi-finished products for billets are thick-walled tubes or die forgings. These blanks are turned to the required shape and volume. The turned ring is then inserted into an induction heater where it is heated to a desired temperature, for example 720 ° C. The output of the heater is monitored by a thermometer, which controls the keeping of the temperature, so that a ring with only the correct temperature is inserted into the rolling machine.

The transport between the heater and the roller is operated by a robot. The rolling process is programmable, computer controlled and stored. This guarantees the repeatability and reproducibility of the profile. After rolling, the ring is removed from the machine and placed on the aftercooling conveyor, which ensures even and controlled aftercooling to a temperature of approximately 300 ° C.

The advantage of this solution is lower energy consumption compared to forging rolling, lower deformation work against cold rolling, higher utilization of material, lower * 4 ·····

4 * ··

- 5 the weight of the hot-rolled bar, longer tool life and the possibility of applying lower allowances and tolerances compared to forging. Scaling and decarburization are minimal and have no practical effect on machining allowances. The solution makes it possible to process larger rings compared to cold rolling.

The proposed new semi-heat rolling technology of bearing rings exploits the technical advantages of both prior art technologies and suppresses their disadvantages. The optimum temperature in the process of the invention is in the range of 700 - 720 ° C, where the deformation resistance of the material is half that of the cold material and the ductility of the material is improved.

Claims (5)

  1. A method for producing bearing rings by rolling a bearing steel blanks with a rolling machine, characterized in that the blanks are heated to a temperature in the range of 600 ° C to 800 ° C prior to rolling.
  2. Method according to claim 1, characterized in that the preform is heated to a temperature in the range of 700 ° C to 720 ° C prior to rolling.
  3. Method according to claim 1 or 2, characterized in that forgings forged by forging or die forging are rolled as blanks.
  4. Method according to claim 1 or 2, characterized in that turned rings are rolled as blanks.
  5. Method according to claim 1 or 2, characterized in that thick-walled tubes are rolled as blanks.
CZ20070845A 2007-11-30 2007-11-30 Process for producing bearing rings by flaring intermediate products from bearing steel with pipe-expanding machine CZ2007845A3 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CZ20070845A CZ2007845A3 (en) 2007-11-30 2007-11-30 Process for producing bearing rings by flaring intermediate products from bearing steel with pipe-expanding machine

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
CZ20070845A CZ2007845A3 (en) 2007-11-30 2007-11-30 Process for producing bearing rings by flaring intermediate products from bearing steel with pipe-expanding machine
US12/323,745 US20090139092A1 (en) 2007-11-30 2008-11-26 Method and manufacturing of ball bearing rings
PCT/CZ2008/000141 WO2009067961A1 (en) 2007-11-30 2008-11-26 Method of manufacturing of ball bearing's rings by rolling-out of the blanks from bearing's steel using a roll-out machine
CNA2008101774165A CN101446316A (en) 2007-11-30 2008-11-27 Method of manufacturing of ball bearing's rings by rolling-out of the blanks from bearing's steel using a roll-out machine
BRPI0822310-6A BRPI0822310A2 (en) 2007-11-30 2008-12-01 Method of manufacture of spherical bearings rings by laminating steel bearing models using a laminating machine

Publications (1)

Publication Number Publication Date
CZ2007845A3 true CZ2007845A3 (en) 2009-06-10

Family

ID=40592036

Family Applications (1)

Application Number Title Priority Date Filing Date
CZ20070845A CZ2007845A3 (en) 2007-11-30 2007-11-30 Process for producing bearing rings by flaring intermediate products from bearing steel with pipe-expanding machine

Country Status (5)

Country Link
US (1) US20090139092A1 (en)
CN (1) CN101446316A (en)
BR (1) BRPI0822310A2 (en)
CZ (1) CZ2007845A3 (en)
WO (1) WO2009067961A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BR112014010596A2 (en) * 2011-11-02 2017-05-02 Mauser-Werke Oberndorf Maschb Gmbh method and device for inserting a bearing sleeve
CN107414425A (en) * 2017-08-03 2017-12-01 常州市双强机械制造有限公司 Wind-powered electricity generation gear ring bearing seamless ring technique
CN109681532B (en) * 2019-01-07 2020-10-02 广州大学 Composite machining method for inner ring of roller bearing

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1452535A (en) * 1919-06-23 1923-04-24 Chicago Mfg And Distributing C Manufacture of bearing rings
US1854897A (en) * 1929-12-26 1932-04-19 Joseph A Ganster Method of making bearing rings
US2376779A (en) * 1942-09-30 1945-05-22 Elizabeth B Dickson Process for making antifriction bearings
FR1069592A (en) * 1952-01-18 1954-07-09 Kugelfischer G Schaefer & Co A method for producing raceways of rings for rolling bearings
US2893114A (en) * 1953-12-04 1959-07-07 Roy A Halversen Hot working of metals
US3046653A (en) * 1958-05-14 1962-07-31 Zd Y Presneho Strojirenstvi Li Forging of rings and similar parts
GB1172093A (en) * 1965-10-23 1969-11-26 Federal Mogul Corp Improvements in Forging Parts from Workpieces
US4393563A (en) * 1981-05-26 1983-07-19 Smith David T Cold forced sintered powder metal annular bearing ring blanks
JP3285927B2 (en) * 1992-05-25 2002-05-27 エヌティエヌ株式会社 Manufacturing method of split bearing ring
JP3366534B2 (en) * 1996-09-19 2003-01-14 山陽特殊製鋼株式会社 Warm or hot front-rear simultaneous extrusion high-speed die forging method and apparatus
DE10219441C1 (en) * 2002-04-25 2003-09-18 Univ Dresden Tech Machine tool for the production of inner/outer roller bearing and gear rings ready for grinding, from tubular or solid workpieces, uses a combination of lathe turning and profile roller shaping in series and/or in parallel
SE525426C2 (en) * 2002-05-02 2005-02-15 Skf Ab Method of manufacturing rings and a device for implementing the method.

Also Published As

Publication number Publication date
BRPI0822310A2 (en) 2013-12-10
WO2009067961A1 (en) 2009-06-04
US20090139092A1 (en) 2009-06-04
CN101446316A (en) 2009-06-03

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