WO1997041996A1 - Process for producing moulded bodies - Google Patents
Process for producing moulded bodies Download PDFInfo
- 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
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
Description
Beschreibung description
Titel der ErfindungTitle of the invention
Verfahren zum Herstellen von FormkörpernProcess for the production of moldings
Anwendungsgebiet der ErfindungField of application of the invention
Die Erfindung betrifft ein Verfahren zum Herstellen von Formkörpern aus Eisenlegierungen, insbesondere Käfige für Radial-, Axial- oder Linearlager, wobei in einem Metallband durch Ausstanzungen Wälzkörper aufnehmende Taschen gebildet werden und die Formkörper zur Erzielung gewünschter Eigen¬ schaften wie Härte, Festigkeit und Verschleißverhalten einer thermischen oder thermisch-chemischen Behandlung unterworfen sind.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.
Hintergrund der ErfindungBackground of the Invention
Wälzlagerkäfige aus Stahl werden in der Großserienfertigung durch unterschied¬ liche Verfahren hergestellt. Sie können beispielsweise aus Stahlblech durch Ziehen, Stanzen und Biegen oder auch aus Stahlrohren hergestellt werden (DE-OS 21 47 169, DE-OS 21 47 171 ). Käfige für besonders hohe Beanspru- chungen können zusätzlich durch thermische oder thermisch-chemische Be¬ handlungsverfahren, wie z. B. Einsatzhärten oder Nitrieren in ihren Festigkeits¬ und Verschleißeigenschaften verbessert werden (DE-OS 25 56 745).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).
Es ist auch bekannt, Käfige für Radiallager aus Bandmaterial zu fertigen, indem man aus dem Band Wälzkörper aufnehmende Taschen ausstanzt, das Band rundbiegt und gegebenenfalls an seinen aneinanderstoßenden Enden zusam¬ menschweißt (FR 12 56 601 , US 22 88 564). Diese Verfahrensweise der Käfig- herstellung aus einem gebogenen Band wird auch für Axiallager angewendet (DE 21 46 056 C3).It is also known to manufacture cages for radial bearings from strip material by punching out pockets receiving rolling elements from the strip, bending the strip round and optionally welding them together at their abutting ends (FR 12 56 601, US 22 88 564). This procedure the cage Manufacture from a curved band is also used for thrust bearings (DE 21 46 056 C3).
Durch die zur Verbesserung der Eigenschaften angewandte Behandlung tritt insbesondere bei Filigrankäfigen, d. h. Käfigen mit geringen Wand- und Steg¬ stärken das Problem auf, daß die als Verzug bezeichnete Form- und Maßände¬ rungen besonders durchschlagen, d. h. im Extremfall ein derartiges Teil un¬ brauchbar machen. So werden beim Härten diese Maß- und Formänderungen der Werkstücke durch Überlagerung der aufgrund thermisch bedingter Eigen- Spannungen hervorgerufenen Deformation und der umwandlungsbedingten Volumenänderung hervorgerufen.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. During hardening, 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.
Zusammenfassung der ErfindungSummary of the invention
Der Erfindung liegt daher die Aufgabe zugrunde, Formkörper trotz einer Anwen¬ dung von Behandlungsverfahren zu deren Eigenschaftsverbesserung so zu fertigen, daß deren Verzug verhindert wird.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.
Erfindungsgemäß wird diese Aufgabe nach dem kennzeichnenden Teil von Anspruch 1 dadurch gelöst, daß die thermische oder thermisch-chemische Behandlung des Metallbandes vor dem Ausstanzen der Taschen erfolgt.According to the invention 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.
Auf diese Weise werden durch ein Vorziehen der thermischen bzw. thermisch¬ chemischen Behandlungsverfahren und deren Anwendung auf das Ausgangs- material die unvermeidbaren Form- und Maßänderungen der Teile eliminiert, da die durch Eigenspannung hervorgerufenen Deformationen und die umwand¬ lungsbedingten Volumenänderung vor der Fertigstellung der endgültigen Form der Teile abgelaufen sind.In this way, the inevitable changes in shape and size of the parts are eliminated by advancing the thermal or thermal-chemical treatment processes and applying them to the starting material, since the deformations caused by internal stress and the change in volume caused by the transformation prior to the completion of the final one Shape of the parts have expired.
Unter thermischen Verfahren sind dabei in bekannter Weise Wärmebehand¬ lungsverfahren zu verstehen, mit denen bestimmte Verarbeitungs- und/oder Gebraucheigenschaften durch thermische Einwirkung ohne beabsichtigte Ände¬ rung der chemischen Zusammensetzung verbessert oder erreicht werden sollen. Unter thermisch-chemischen Verfahren sind Wärmebehandlungsverfahren mit dem Ziel zu verstehen, durch thermische und chemische Einwirkungen die chemische Zusammensetzung und das Gefüge vorzugsweise in der Randschicht zu verändern, um ebenfalls bestimmte Gebrauchseigenschaften zu erreichen.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.
Aus den Ansprüchen 2 und 3 geht hervor, daß das Metallband rundgebogen und an seinen aneinanderstoßenden Enden verschweißt wird.From claims 2 and 3 it appears that the metal strip is bent round and welded at its abutting ends.
Die werkstofftechnische Besonderheit ist hierbei, daß die Schweißnaht aufgrund der vorbestimmten Härtbarkeit keine Martensitbildung aufweist und demzufolge kein martensitischer Schweißaufwurf entsteht, der möglicherweise abrasiv auf Wälzlagerbauteile, wie Laufbahnen, wirken könnte.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.
Da aufgrund der kurzzeitigen Schweißerwärmung, im Bereich unterhalb der AC, -Temperatur, das vergütete Bandgefüge keinen wesentlichen Anlaßeffekt erfährt, ist vorteilhafter Weise keine Erweichung im Schweißnahtübergangs¬ bereich vorhanden, die niedriger als die Grundfestigkeit ist. Die auftretenden Schweißeigenspannungen werden aufgrund der hinreichenden Werkstoffzähig¬ keit weitestgehend abgebaut.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.
In weiterer Ausgestaltung der Erfindung soll das Band nach Anspruch 4 einsatz¬ gehärtet oder nitrokarburiert sein. Bei der Einsatzhärtung werden in bekannter Weise Stähle mit einem geringen Kohlenstoffgehalt von 0,05 bis 0,20 %, die also praktisch nicht härtbar sind, in kohlenstoffabgebenden festen, flüssigen oder gasförmigen Mitteln bei Temperaturen zwischen 850 bis 1.000 °C geglüht. Der Kohlenstoff diffundiert dabei in die Randschichten des eingesetzten Werk¬ stücks ein, so daß man eine Art Verbundwerkstoff erhält, der aus einem Kern mit niedrigem und aus einem Rand mit hohem Kohlenstoffgehalt besteht.In a further embodiment of the invention, the tape is to be case-hardened or nitro-carburized according to claim 4. In case hardening, 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.
Das Nitrokarburieren ist wie das Einsatzhärten ein thermisch-chemisches Ver¬ fahren. Dabei wird die Oberfläche mit Stickstoff und Kohlenstoff angereichert. Ziel dieser thermisch-chemischen Behandlungen ist immer die Einstellung der eingangs genannten Eigenschaften, wie Härte, Dauer- und Verschleißfestigkeit. In vorteilhafter Weise ist nach Anspruch 5 eine Anlaßbehandlung vorgesehen, wobei diese gemäß Anspruch 6 bei etwa 180 °C mit einer Haltezeit von etwa 1 Stunde oder bei etwa 350 °C mit einer Haltezeit von etwa 5 Sekunden erfolgen soll.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. Advantageously, 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.
Durch dieses Anlassen wird eine Stabilisierung des verformten Gefüges erreicht und somit die Dauerfestigkeit erhöht sowie Schweißeigenspannungen abgebaut, aber keine Maß- und Formänderung bewirkt.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.
Die Erfindung wird an nachstehendem Ausführungsbeispiel anhand eines Käfigs für ein Radialwälzlager näher erläutert.The invention is explained in more detail using the following embodiment with reference to a cage for a radial roller bearing.
Kurze Beschreibung der ZeichnungenBrief description of the drawings
Es zeigen:Show it:
Figur 1 ein flaches Blechband im Ausgangszustand;Figure 1 is a flat sheet metal strip in the initial state;
Figur 2 dieses Blechband nach dem Ausstanzen der Taschen undFigure 2 this sheet metal strip after punching out the pockets and
Figur 3 ein aus dem ausgestanzten Blechband zusammengerollter und geschweißter Käfig.Figure 3 is a rolled and welded cage from the punched sheet metal strip.
Ausführliche Beschreibung der ZeichnungenDetailed description of the drawings
Das in Figur 1 dargestellte flache und geradlinige Blechband 1 aus C22, d. h. einem Kohlenstoffstahl mit 0,22 % C wird bei 800 bis 900 °C in einem Durch¬ laufofen vergütet, wie das typischer Weise mit Federbändern nach DIN 1 7 222 geschieht. Die durch das Vergüten erreichte Festigkeit soll 250 bis 350 HV bzw. 850 bis 1 .100 N/mm2 Zugfestigkeit betragen. In ein derart vergütetes Band 1 werden nun gemäß Figur 2 Wälzkörper aufnehmende Taschen 2 ausgestanzt, bevor, wie aus Figur 3 ersichtlich, das perforierte Band 1 zu einem Radialkäfig 3 rundgebogen wird, dessen beide aneinanderstoßende Enden 4, 5 durch einen Schweißvorgang miteinander verunden werden.The flat and rectilinear sheet metal strip 1 shown in FIG. 1 made of C22, ie a carbon steel with 0.22% C, is tempered at 800 to 900 ° C. in a continuous furnace, as is typically done with spring strips according to DIN 1 7 222. The strength achieved by tempering should be 250 to 350 HV or 850 to 1,100 N / mm 2 tensile strength. According to FIG. 2, 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.
Auf diese Weise ist der offensichtliche Vorteil ausgezeichneter Gebrauchseigen- scharten durch Härten bzw. Vergüten nicht mehr mit dem Nachteil des Verzugs und der Formänderung verknüpft, da die unvermeidbaren Form- und Ma߬ änderungen auf das flache und ungestanzte Ausgangsband vorverlegt wurden.In this way, the obvious advantage of excellent proprietary characteristics by hardening or tempering is no longer linked to the disadvantage of warping and changing the shape, since the inevitable changes in shape and size have been brought forward to the flat and un-punched starting strip.
Das Ausführungsbeispiel kann auch auf ebene oder lineare Lageranordnungen angewendet werden, wo eine hin- und hergehende lineare Bewegung in einer Ebene auftritt, z. B. in Maschinenführungen. In diesem Fall bleibt natürlich der Metallstreifen eben und wird nicht zu einem ringförmigen Käfig aufgerollt und an seinen beiden Enden zusammengeschweißt. Aber auch die Anwendung der erfindungsgemäßen Verfahrensweise für die Herstellung eines Axialkäfigs ist problemlos möglich. 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. In this case, of course, the metal strip remains flat and is not rolled up into an annular cage and welded together at both ends. However, the method according to the invention can also be used without problems for the production of an axial cage.
BezugszahlenlisteLIST OF REFERENCE NUMBERS
Blechband Tasche Radialkäfig Ende Ende Sheet metal bag pocket radial cage end end
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19780400T DE19780400D2 (en) | 1996-05-06 | 1997-01-24 | Process for the production of moldings |
| 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 |
|---|---|---|---|
| DE19618065.1 | 1996-05-06 | ||
| DE19618065A DE19618065A1 (en) | 1996-05-06 | 1996-05-06 | Process for the production of moldings |
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 (en) | 1997-11-13 |
Family
ID=7793423
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP1997/000323 Ceased WO1997041996A1 (en) | 1996-05-06 | 1997-01-24 | Process for producing moulded bodies |
Country Status (3)
| Country | Link |
|---|---|
| KR (1) | KR20000010768A (en) |
| DE (2) | DE19618065A1 (en) |
| WO (1) | WO1997041996A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100738849B1 (en) * | 2000-04-22 | 2007-07-12 | 쉐플러 카게 | Rolling bearing parts |
| CN103415717A (en) * | 2011-02-24 | 2013-11-27 | 谢夫勒科技股份两合公司 | Rolling element cage |
| DE102014212752A1 (en) * | 2014-07-02 | 2016-01-07 | Schaeffler Technologies AG & Co. KG | Method for producing a roller bearing cage from a metal sheet |
| CN108032036A (en) * | 2017-11-27 | 2018-05-15 | 重庆市大足区捷瑞机械设备制造有限公司 | A kind of clutch steel disc processing method |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10011651B4 (en) * | 2000-03-10 | 2009-12-24 | Schaeffler Kg | Rotationally symmetrical molded part |
| US7114854B2 (en) * | 2002-11-07 | 2006-10-03 | Ntn Corporation | Thrust roller bearing and cage |
| DE102006024720B4 (en) * | 2006-05-26 | 2010-04-01 | Ab Skf | Rolling bearings with a cage |
| DE102007019917B4 (en) * | 2007-04-27 | 2009-04-09 | Ab Skf | Tapered roller bearings |
| DE102015204773B4 (en) * | 2015-03-17 | 2023-05-11 | Aktiebolaget Skf | Layer formation for roller bearing cages |
| CN104723038A (en) * | 2015-03-23 | 2015-06-24 | 中航工业哈尔滨轴承有限公司 | Method for machining circular hole alloy steel cage with inner-and-outer double fore shafts |
| DE102020103407A1 (en) | 2020-02-11 | 2021-08-12 | Schaeffler Technologies AG & Co. KG | Thrust washer |
| CN119457720B (en) * | 2024-11-01 | 2025-10-28 | 中国航发贵州黎阳航空动力有限公司 | A forming method for a cylinder with a boss |
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| US3173192A (en) * | 1962-12-05 | 1965-03-16 | Mcgill Mfg Company Inc | Method for fabricating roller bearing retainers |
| DE2556745A1 (en) * | 1975-12-17 | 1977-06-30 | Kugelfischer G Schaefer & Co | Roller bearing cage with anti-corrosion coating - has nickel layer applied to steel surface by heating under gas or in vacuum |
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|---|---|---|---|---|
| DE7119285U (en) * | 1971-08-12 | Zahnradfabrik Friedrichshafen Ag | Cage for needle bearings to guide the needles | |
| 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 (en) * | 1948-10-02 | 1951-08-13 | Metallgesellschaft Ag | Process for the production of stamped and deep drawn parts from sheet metal or strip |
| FR1256601A (en) * | 1960-02-09 | 1961-03-24 | Roulements A Aiguilles Sa | Needle bearing cage and its manufacturing process |
| FR1470088A (en) * | 1967-04-21 | 1967-02-17 | Torrington Mfg Co | Manufacturing process for bearing cages |
| JPH07127646A (en) * | 1993-10-29 | 1995-05-16 | Ntn Corp | Retainer for roller bearing |
| DE19500576C2 (en) * | 1994-03-16 | 1996-07-11 | Schaeffler Waelzlager Kg | Process for the thermochemical treatment of thin-walled components |
-
1996
- 1996-05-06 DE DE19618065A patent/DE19618065A1/en not_active Withdrawn
-
1997
- 1997-01-24 DE DE19780400T patent/DE19780400D2/en not_active Expired - Lifetime
- 1997-01-24 WO PCT/EP1997/000323 patent/WO1997041996A1/en not_active Ceased
- 1997-01-24 KR KR1019980708890A patent/KR20000010768A/en not_active Ceased
Patent Citations (2)
| 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 (en) * | 1975-12-17 | 1977-06-30 | Kugelfischer G Schaefer & Co | Roller bearing cage with anti-corrosion coating - has nickel layer applied to steel surface by heating under gas or in vacuum |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100738849B1 (en) * | 2000-04-22 | 2007-07-12 | 쉐플러 카게 | Rolling bearing parts |
| CN103415717A (en) * | 2011-02-24 | 2013-11-27 | 谢夫勒科技股份两合公司 | Rolling element cage |
| CN103415717B (en) * | 2011-02-24 | 2016-05-18 | 舍弗勒技术股份两合公司 | rolling element cage |
| DE102014212752A1 (en) * | 2014-07-02 | 2016-01-07 | Schaeffler Technologies AG & Co. KG | Method for producing a roller bearing cage from a metal sheet |
| CN108032036A (en) * | 2017-11-27 | 2018-05-15 | 重庆市大足区捷瑞机械设备制造有限公司 | A kind of clutch steel disc processing method |
Also Published As
| Publication number | Publication date |
|---|---|
| DE19618065A1 (en) | 1997-11-13 |
| DE19780400D2 (en) | 1998-12-03 |
| KR20000010768A (en) | 2000-02-25 |
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