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WO1997041996A1 - Procede de production de corps moules - Google Patents

Procede de production de corps moules Download PDF

Info

Publication number
WO1997041996A1
WO1997041996A1 PCT/EP1997/000323 EP9700323W WO9741996A1 WO 1997041996 A1 WO1997041996 A1 WO 1997041996A1 EP 9700323 W EP9700323 W EP 9700323W WO 9741996 A1 WO9741996 A1 WO 9741996A1
Authority
WO
WIPO (PCT)
Prior art keywords
metal strip
thermal
pockets
moulded bodies
roller bearings
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.)
Ceased
Application number
PCT/EP1997/000323
Other languages
German (de)
English (en)
Inventor
Leo Müntnich
Karl-Ludwig Grell
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.)
INA Waelzlager Schaeffler OHG
Original Assignee
INA Waelzlager Schaeffler OHG
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 INA Waelzlager Schaeffler OHG filed Critical INA Waelzlager Schaeffler OHG
Priority to DE19780400T priority Critical patent/DE19780400D2/de
Publication of WO1997041996A1 publication Critical patent/WO1997041996A1/fr
Priority to US09/184,124 priority patent/US6330748B1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • B23P15/003—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass bearings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • 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
    • F16C33/46—Cages for rollers or needles
    • F16C33/54—Cages for rollers or needles made from wire, strips, or sheet metal
    • F16C33/542—Cages for rollers or needles made from wire, strips, or sheet metal made from sheet metal
    • F16C33/543—Cages for rollers or needles made from wire, strips, or sheet metal made from sheet metal from a single part
    • F16C33/545—Cages for rollers or needles made from wire, strips, or sheet metal made from sheet metal from a single part rolled from a band
    • 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

Definitions

  • the invention relates to a process for the production of moldings from iron alloys, in particular cages for radial, axial or linear bearings, wherein pockets which hold rolling elements are formed in a metal strip by punching and the moldings to achieve desired properties such as hardness, strength and wear behavior are subjected to thermal or thermal-chemical treatment.
  • Rolling cages made of steel are manufactured in large series by various processes. They can be made from sheet steel, for example, by drawing, punching and bending, or also from steel pipes (DE-OS 21 47 169, DE-OS 21 47 171). Cages for particularly high loads can additionally be processed by thermal or thermochemical treatment processes, such as. B. case hardening or nitriding can be improved in their strength and wear properties (DE-OS 25 56 745).
  • the treatment used to improve the properties occurs particularly in filigree cages, i.e. H. Cages with small wall and web strengthens the problem that the changes in shape and dimensions referred to as warping particularly break through, ie. H. in extreme cases render such a part unusable.
  • warping particularly break through
  • these dimensional and shape changes in the workpieces are caused by the superimposition of the deformation caused by the thermal stresses and the change in volume caused by the transformation.
  • the invention is therefore based on the object, in spite of an application of treatment processes to improve their properties, to produce moldings in such a way that their distortion is prevented.
  • this object is achieved according to the characterizing part of claim 1 in that the thermal or thermo-chemical treatment of the metal strip is carried out before the pockets are punched out.
  • Thermal processes are to be understood in a known manner as heat treatment processes with which certain processing and / or usage properties are to be improved or achieved by thermal action without any intentional change in the chemical composition.
  • Thermal-chemical processes are to be understood as heat treatment processes with the aim of changing the chemical composition and the structure, preferably in the surface layer, by thermal and chemical influences in order to likewise achieve certain usage properties.
  • the material-technical peculiarity is that due to the predetermined hardenability, the weld seam has no martensite formation and consequently no martensitic weld build-up, which could possibly have an abrasive effect on rolling bearing components such as raceways.
  • the tempered strip structure Since, due to the brief heating of the weld, in the area below the AC, temperature, the tempered strip structure does not experience any significant starting effect, there is advantageously no softening in the weld seam transition area that is lower than the basic strength. The inherent welding stresses are largely reduced due to the sufficient material toughness.
  • the tape is to be case-hardened or nitro-carburized according to claim 4.
  • steels with a low carbon content of 0.05 to 0.20%, which are therefore practically not hardenable are annealed in carbon-donating solid, liquid or gaseous agents at temperatures between 850 and 1,000 ° C.
  • the carbon diffuses into the edge layers of the workpiece used, so that a type of composite material is obtained which consists of a core with a low and an edge with a high carbon content.
  • Nitro-carburizing like case hardening, is a thermal-chemical process.
  • the surface is enriched with nitrogen and carbon.
  • the aim of these thermal-chemical treatments is always to set the properties mentioned at the outset, such as hardness, durability and wear resistance.
  • a tempering treatment is provided according to claim 5, which is to be carried out according to claim 6 at about 180 ° C with a holding time of about 1 hour or at about 350 ° C with a holding time of about 5 seconds.
  • This tempering stabilizes the deformed structure and thus increases the fatigue strength and residual welding stress, but does not cause any change in shape or shape.
  • Figure 1 is a flat sheet metal strip in the initial state
  • Figure 3 is a rolled and welded cage from the punched sheet metal strip.
  • the strength achieved by tempering should be 250 to 350 HV or 850 to 1,100 N / mm 2 tensile strength.
  • pockets 2 receiving rolling elements are punched out into a band 1 that has been tempered in this way, before, as can be seen from FIG. 3, the perforated band 1 into a radial cage 3 is bent round, the two abutting ends 4, 5 are joined together by a welding process.
  • the embodiment can also be applied to flat or linear bearing arrangements where a reciprocating linear movement occurs in a plane, e.g. B. in machine guides.
  • a reciprocating linear movement occurs in a plane, e.g. B. in machine guides.
  • the metal strip remains flat and is not rolled up into an annular cage and welded together at both ends.
  • the method according to the invention can also be used without problems for the production of an axial cage.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

L'invention a pour objet un procédé de production de corps moulés en alliages à base de fer, en particulier de cages pour coussinets radiaux, axiaux ou linéaires, selon lequel des poches (2) destinées au logement des roulements sont formées par découpage à la matrice dans une bande métallique (1), et les corps moulés sont soumis à un traitement thermique ou thermochimique, en vue d'obtenir des propriétés spécifiques telles que dureté, résistance mécanique et résistance à l'usure. Conformément à l'invention, ce traitement, par exemple trempe et revenu ou cémentation au carbone, est déjà effectué sur la bande plate (1), avant découpage des poches (2), ce qui permet d'éviter des distorsions telles que des modifications de cotes et de forme.
PCT/EP1997/000323 1996-05-06 1997-01-24 Procede de production de corps moules Ceased WO1997041996A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE19780400T DE19780400D2 (de) 1996-05-06 1997-01-24 Verfahren zum Herstellen von Formkörpern
US09/184,124 US6330748B1 (en) 1997-01-24 1998-11-02 Method of making formed bodies

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19618065A DE19618065A1 (de) 1996-05-06 1996-05-06 Verfahren zum Herstellen von Formkörpern
DE19618065.1 1996-05-06

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US09/184,124 Continuation US6330748B1 (en) 1997-01-24 1998-11-02 Method of making formed bodies

Publications (1)

Publication Number Publication Date
WO1997041996A1 true WO1997041996A1 (fr) 1997-11-13

Family

ID=7793423

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1997/000323 Ceased WO1997041996A1 (fr) 1996-05-06 1997-01-24 Procede de production de corps moules

Country Status (3)

Country Link
KR (1) KR20000010768A (fr)
DE (2) DE19618065A1 (fr)
WO (1) WO1997041996A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100738849B1 (ko) * 2000-04-22 2007-07-12 쉐플러 카게 롤링 베어링 부품
CN103415717A (zh) * 2011-02-24 2013-11-27 谢夫勒科技股份两合公司 滚动体保持架
DE102014212752A1 (de) * 2014-07-02 2016-01-07 Schaeffler Technologies AG & Co. KG Verfahren zum Herstellen eines Wälzlagerkäfigs aus einem Blech
CN108032036A (zh) * 2017-11-27 2018-05-15 重庆市大足区捷瑞机械设备制造有限公司 一种离合器钢片加工方法

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10011651B4 (de) * 2000-03-10 2009-12-24 Schaeffler Kg Rotationssymmetrisches Formteil
US7114854B2 (en) 2002-11-07 2006-10-03 Ntn Corporation Thrust roller bearing and cage
DE102006024720B4 (de) * 2006-05-26 2010-04-01 Ab Skf Wälzlager mit einem Käfig
DE102007019917B4 (de) * 2007-04-27 2009-04-09 Ab Skf Schrägrollenlager
DE102015204773B4 (de) * 2015-03-17 2023-05-11 Aktiebolaget Skf Schichtbildung für Wälzlagerkäfige
CN104723038A (zh) * 2015-03-23 2015-06-24 中航工业哈尔滨轴承有限公司 一种内、外双锁口圆孔合金钢保持架的加工方法
DE102020103407A1 (de) 2020-02-11 2021-08-12 Schaeffler Technologies AG & Co. KG Axialscheibe
CN119457720B (zh) * 2024-11-01 2025-10-28 中国航发贵州黎阳航空动力有限公司 一种带凸台筒体的成型方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3173192A (en) * 1962-12-05 1965-03-16 Mcgill Mfg Company Inc Method for fabricating roller bearing retainers
DE2556745A1 (de) * 1975-12-17 1977-06-30 Kugelfischer G Schaefer & Co Waelzlagerkaefig

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7119285U (de) * 1971-08-12 Zahnradfabrik Friedrichshafen Ag Käfig fur Nadellager zur Fuhrung der Nadeln
US1712076A (en) * 1927-02-19 1929-05-07 New Departure Mfg Co Separator and method therefor
US2288564A (en) * 1940-06-25 1942-06-30 Orange Roller Bearing Co Inc Method of making cages for roller bearings
DE810866C (de) * 1948-10-02 1951-08-13 Metallgesellschaft Ag Verfahren zur Herstellung von Stanz- und Tiefziehteilen aus Metallblech oder -band
FR1256601A (fr) * 1960-02-09 1961-03-24 Roulements A Aiguilles Sa Cage de roulement à aiguilles et son procédé de fabrication
FR1470088A (fr) * 1967-04-21 1967-02-17 Torrington Mfg Co Procédé de fabrication de cages pour roulements
JPH07127646A (ja) * 1993-10-29 1995-05-16 Ntn Corp ころ軸受用保持器
DE19500576C2 (de) * 1994-03-16 1996-07-11 Schaeffler Waelzlager Kg Verfahren zur thermochemischen Behandlung von dünnwandigen Bauteilen

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3173192A (en) * 1962-12-05 1965-03-16 Mcgill Mfg Company Inc Method for fabricating roller bearing retainers
DE2556745A1 (de) * 1975-12-17 1977-06-30 Kugelfischer G Schaefer & Co Waelzlagerkaefig

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100738849B1 (ko) * 2000-04-22 2007-07-12 쉐플러 카게 롤링 베어링 부품
CN103415717A (zh) * 2011-02-24 2013-11-27 谢夫勒科技股份两合公司 滚动体保持架
CN103415717B (zh) * 2011-02-24 2016-05-18 舍弗勒技术股份两合公司 滚动体保持架
DE102014212752A1 (de) * 2014-07-02 2016-01-07 Schaeffler Technologies AG & Co. KG Verfahren zum Herstellen eines Wälzlagerkäfigs aus einem Blech
CN108032036A (zh) * 2017-11-27 2018-05-15 重庆市大足区捷瑞机械设备制造有限公司 一种离合器钢片加工方法

Also Published As

Publication number Publication date
KR20000010768A (ko) 2000-02-25
DE19618065A1 (de) 1997-11-13
DE19780400D2 (de) 1998-12-03

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