CH624741A5 - Precision rolling bearing - Google Patents

Precision rolling bearing Download PDF

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Publication number
CH624741A5
CH624741A5 CH80277A CH80277A CH624741A5 CH 624741 A5 CH624741 A5 CH 624741A5 CH 80277 A CH80277 A CH 80277A CH 80277 A CH80277 A CH 80277A CH 624741 A5 CH624741 A5 CH 624741A5
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Switzerland
Prior art keywords
precision
bearing according
races
bearings
rolling
Prior art date
Application number
CH80277A
Other languages
German (de)
Inventor
Johann Lammer
Hans Rudolf Kocher
Hans-Erich Hintermann
Original Assignee
Suisse Horlogerie Rech Lab
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 Suisse Horlogerie Rech Lab filed Critical Suisse Horlogerie Rech Lab
Priority to CH80277A priority Critical patent/CH624741A5/en
Priority to AT0370277A priority patent/AT381995B/en
Priority to NL7800108A priority patent/NL7800108A/en
Priority to DE2800854A priority patent/DE2800854C2/en
Priority to DE7800563U priority patent/DE7800563U1/en
Priority to IT47599/78A priority patent/IT1101903B/en
Priority to SE7800545A priority patent/SE440259B/en
Priority to GB2232/78A priority patent/GB1589041A/en
Priority to FR7802808A priority patent/FR2378204A1/en
Priority to BE1008657A priority patent/BE863101A/en
Priority to JP572878A priority patent/JPS53131285A/en
Publication of CH624741A5 publication Critical patent/CH624741A5/en

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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
    • F16C33/32—Balls
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
    • C04B41/5053—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials non-oxide ceramics
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
    • C04B41/81—Coating or impregnation
    • C04B41/85—Coating or impregnation with inorganic materials
    • C04B41/87—Ceramics
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C30/00—Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process
    • C23C30/005—Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process on hard metal substrates
    • 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
    • F16C33/303—Parts of ball or roller bearings of hybrid bearings, e.g. rolling bearings with steel races and ceramic rolling elements
    • 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
    • F16C33/34—Rollers; 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
    • F16C33/46—Cages for rollers or needles
    • F16C33/56—Selection of substances
    • F16C33/565—Coatings
    • 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
    • F16C2206/00—Materials with ceramics, cermets, hard carbon or similar non-metallic hard materials as main constituents
    • F16C2206/40—Ceramics, e.g. carbides, nitrides, oxides, borides of a metal
    • 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
    • F16C2206/00—Materials with ceramics, cermets, hard carbon or similar non-metallic hard materials as main constituents
    • F16C2206/40—Ceramics, e.g. carbides, nitrides, oxides, borides of a metal
    • F16C2206/56—Ceramics, e.g. carbides, nitrides, oxides, borides of a metal based on ceramic carbides, e.g. silicon carbide (SiC)
    • 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
    • F16C2206/00—Materials with ceramics, cermets, hard carbon or similar non-metallic hard materials as main constituents
    • F16C2206/80—Cermets, i.e. composites of ceramics and metal
    • F16C2206/82—Cermets, i.e. composites of ceramics and metal based on tungsten carbide [WC]
    • 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
    • F16C33/66—Special parts or details in view of lubrication
    • F16C33/6696—Special parts or details in view of lubrication with solids as lubricant, e.g. dry coatings, powder

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Metallurgy (AREA)
  • Rolling Contact Bearings (AREA)
  • Chemical Vapour Deposition (AREA)

Description

Die vorliegende Erfindung betrifft Wälzlager, bei denen die Rollelemente aus Hartmetall bestehen, die mit einer Diffusionsbarriere aus einem verschleissfesten Hartstoff mit einem kleinen Reibungskoeffizienten gegenüber dem Ringmaterial beschichtet sind. Die erfindungsgemässen Lager ermöglichen die Herstellung von Präzisionslagern höchster Güteklassen, nach AFBMA Nonnen ABEC 7 und 9, und sind für Anwendungen bis zu extremsten Umweltsbedingungen geeignet. The present invention relates to rolling bearings in which the rolling elements are made of hard metal, which are coated with a diffusion barrier made of a wear-resistant hard material with a small coefficient of friction compared to the ring material. The bearings according to the invention enable the manufacture of precision bearings of the highest quality classes, according to AFBMA nuns ABEC 7 and 9, and are suitable for applications up to the most extreme environmental conditions.

Wälzlager, die für Weltraumanwendungen vorgesehen sind, sowie Wälzlager für Anwendungen im Hochtemperatur-Kernreaktorbau, die unter Inertgasatmosphäre laufen sollen, können nicht auf herkömmliche Weise geschmiert werden, da die beständigsten Flüssigschmiermittel bei Temperaturen über 180°C und (oder) wegen des Vakums verdampfen. Die Reibungskoeffizienten Stahl-Stahl ohne Schmiermittel sind sehr hoch und betragen zum 20fachen bei Betrieb im Hochvakuum (IO-6 mbar) oder Helium einer Temperatur von 320C. Rolling bearings intended for space applications, as well as rolling bearings for applications in high-temperature nuclear reactor construction, which are supposed to run under an inert gas atmosphere, cannot be lubricated in a conventional manner, since the most stable liquid lubricants evaporate at temperatures above 180 ° C and (or) due to the vacuum. The friction coefficients steel-steel without lubricants are very high and amount to 20 times when operated in a high vacuum (IO-6 mbar) or helium at a temperature of 320C.

Die Verschweissneigung zwischen dem Ringmaterial und den Kugeln bzw. Rollen des Lagers führt zu übermässigem Verschleiss der Rollreibepartner, so dass die Lager eine stark begrenzte Lebenszeit aufweisen. Infolge des Verschleisses findet eine ständige Aenderung der Lagercharakteristika statt. Für den Temperaturbereich bis 450°C und im Hochvakuum wurden Kugellager, deren Laufbahn mit Titankarbid beschichtet wurde (Schweizer Archiv für angewandte Wissenschaft und Technik, Heft 6,33. Jahrgang 1967, und Heft 6, 36. Jahrgang 1970), und proceedings of the first european space tribology symposium,Frascati,ESA SP III, Italy,9—11. April 1975, page 281-291), erfolgreich eingesetzt. Das Titankarbid hat gegen Stahl einen sehr geringen Reibungswiderstand und dient bei diesen Anwendungen gleichzeitig als Diffusionsbarriere gegenüber den Stahlkugeln. The tendency to weld between the ring material and the balls or rollers of the bearing leads to excessive wear of the rolling friction partners, so that the bearings have a very limited life. As a result of wear and tear, there is a constant change in the bearing characteristics. For the temperature range up to 450 ° C and in a high vacuum, ball bearings, the raceway of which was coated with titanium carbide (Swiss Archives for Applied Science and Technology, Issue 6.33, Year 1967, and Issue 6, Year 36, 1970), and proceedings of the first european space tribology symposium, Frascati, ESA SP III, Italy, 9-11. April 1975, page 281-291), successfully used. The titanium carbide has a very low frictional resistance against steel and at the same time serves as a diffusion barrier to the steel balls in these applications.

Der Nachteil dieser Schutz-Beschichtung, die mittels Abscheidung aus der Gasphase erfolgt, ist die hohe Ab-scheidungstemperatur (800-1200°C). The disadvantage of this protective coating, which takes place by means of deposition from the gas phase, is the high deposition temperature (800-1200 ° C).

Wälzlagerstähle wie zum Beispiel die Stähle 100 Cr 6 oder 440 C zeigen bei diesen Beschichtungstemperaturen so starken Verzug, dass Lager höchster Güteklassen, wie ABEC 7-9 nach AFBMA nicht hergestellt werden können. Lager höchster Güteklassen sind aber die Voraussetzung für schnelldrehende Lager. Rolling bearing steels such as 100 Cr 6 or 440 C steels show such strong distortion at these coating temperatures that bearings of the highest quality classes, such as ABEC 7-9 according to AFBMA, cannot be produced. Bearings of the highest quality are the prerequisite for high-speed bearings.

Die vorliegende Erfindung bezweckt diese Nachteile zu beseitigen und Präzisionslager-Anwendungen in extremen Umweltsbedingungen zuzuführen. The present invention aims to overcome these drawbacks and to supply precision bearing applications in extreme environmental conditions.

Die erfindungsmässigen Wählzlager verwenden ebenfalls die guten Reibeeigenschaften des Titankarbides oder anderer geeigneter Hartstoffe gegen Stahl und deren geringe gegenseitige Löslichkeit, um die gewünschten physico-chemischen Eigenschaften der Oberfläche der Reibepartner zu erzeugen. Es werden zu diesem Zweck die Stahlkugeln normaler Präzisions-Wälzlager durch Hartmetallkugeln, die mit einer Diffusionsbarriere aus verschleissfestem Hartstoff von niedrigem Reibungskoeffizient beschichtet sind, ersetzt. Als Hartstoffe können harte und verschleissfeste Materialien mit niedrigem Reibungskoeffizienten gegenüber dem Ringmaterial, bestehend aus Karbiden und (oder) Nitriden und (oder) Karbonitriden und (oder) Boriden und (oder) Siliziden und (oder) Oxyden von Metallen der Gruppe III bis VI des periodischen Systems eingesetzt werden. Die Hartmetallkugeln können ohne Schaden und Verzug bei hohen Temperaturen beschichtet werden. Präzisionskugel-Hersteller können diese beschichteten Kugeln ohne Problem auf das Endmass der gewünschten Güteklasse nach AFBMA-Normen fertigbearbeiten. The dial bearings according to the invention also use the good friction properties of titanium carbide or other suitable hard materials against steel and their low mutual solubility in order to produce the desired physico-chemical properties of the surface of the friction partners. For this purpose, the steel balls of normal precision rolling bearings are replaced by hard metal balls, which are coated with a diffusion barrier made of wear-resistant hard material with a low coefficient of friction. As hard materials, hard and wear-resistant materials with a low coefficient of friction compared to the ring material, consisting of carbides and (or) nitrides and (or) carbonitrides and (or) borides and (or) silicides and (or) oxides of metals from group III to VI des periodic system. The carbide balls can be coated at high temperatures without damage and warpage. Precision ball manufacturers can finish these coated balls without problems to the final dimension of the desired quality class according to AFBMA standards.

Durch diese Fertigungsmethode wird es nun möglich, auch Präzisionslagern den gewünschten Schutz für Anwendungen unter extremen Bedingungen zu geben. Zudem geben die Hartmetallkugeln den Lagern eine um 10-20% erhöhte Steifigkeit. This manufacturing method now makes it possible to provide precision bearings with the desired protection for applications under extreme conditions. In addition, the carbide balls give the bearings an increased stiffness of 10-20%.

Die Ringe können aus Stahl, hochwarmfesten und (oder) korrosionsbeständigen Legierungen bestehen. Als Käfigmaterial kann entweder ein herkömmlicher Stahlkäfig, der mit einer Trockenschmierschicht versehen ist oder ein Kunststoffkäfig mit oder ohne selbstschmierende Füllstoffe oder Beschichtungen verwendet werden. The rings can be made of steel, high-temperature and (or) corrosion-resistant alloys. Either a conventional steel cage with a dry lubrication layer or a plastic cage with or without self-lubricating fillers or coatings can be used as the cage material.

Nach Festlegung der Lagergüteklasse werden Hartmetallkugeln unter Berücksichtigung einer Bearbeitungszugabe auf die geforderte Genauigkeit und Toleranz geschliffen. Sodann werden sie durch Abscheidung aus der Gasphase oder einem andern geeigneten Verfahren mit Hartstoff beschichtet. Dies kann nach dem für Präzisionsteile patentierten Verfahren Schweizer Patent Nr. 455 856 geschehen. After determining the bearing quality class, carbide balls are ground to the required accuracy and tolerance, taking into account a machining allowance. They are then coated with hard material by deposition from the gas phase or another suitable process. This can be done according to the Swiss Patent No. 455 856 patented for precision parts.

Danach folgt die Fertigbearbeitung der Kugel auf die gewünschte Genauigkeit und der Zusammenbau des Lagers mit den vorgesehenen Käfigen und Laufringen. This is followed by finishing the ball to the desired accuracy and assembling the bearing with the cages and races provided.

Als Laufringe können serienmässige, demontierbare Ringe der gewünschten Güteklasse verwendet werden. Standard, removable rings of the desired quality class can be used as races.

Das erfindungsmässige Verfahren sei an einigen Anwendungsbeispielen erläutert: The method according to the invention will be explained using a few application examples:

1. In heliumgekühlten Kernreaktoren soll die Standzeit der Lager erhöht werden, um den Warungszyklus zu verlängern. 1. In helium-cooled nuclear reactors, the service life of the bearings is to be increased in order to extend the maintenance cycle.

Kugellager gemäss Erfindung mit Hartmetallkugeln mit einer nach dem Verfahren der chemischen Abscheidung in der Gasphase nach Patent CH 455 856 aufgebrachten Diffusionsbarriere aus Titankarbid von 6 um Schichtdicke, Laufringen aus Wälzlagerstahl 100 Cr 6 und molybdändisulfidbeschichte-ten Stahlkäfigen wurden in Reinsthelium bei 320°C mit 100 Umdrehungen / min. geprüft und eine 25mal längere Stand5 Ball bearings according to the invention with hard metal balls with a diffusion barrier made of titanium carbide with a layer thickness of 6 μm, applied by the chemical vapor deposition method according to patent CH 455 856, raceways made of bearing steel 100 Cr 6 and molybdenum disulphide-coated steel cages were made at 100 ° C in pure helium at 320 ° C Revolutions / min. tested and a 25 times longer stand5

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zeit als mit herkömmlichen, mit Stahlkugeln ausgerüsteten Lagern erzielt. time than achieved with conventional bearings equipped with steel balls.

2. Schnelldrehende Röntgendrehanoden- (Antikathoden)-lager haben während ihres Betriebes eine sehr hohe thermische Strahlungsbelastung zu ertragen. Die Ausstattung mit s herkömmlichen Lagern erfordert nicht nur einen sehr intensiven Wartungsbetrieb, sondern beinhaltet die Gefahr des Versagens der Röntgenanlage in kritischen Momenten. 2. Fast rotating x-ray anode (anti-cathode) bearings have to endure a very high thermal radiation load during their operation. Equipping with conventional bearings not only requires very intensive maintenance operations, but also involves the risk of the X-ray system failing at critical moments.

Zur Verbesserung der Standzeit von schnelldrehenden Röntgendrehanoden bzw. Antikathoden können Kugellager 10 gemäss Erfindung mit Hartmetallkugeln mit einer nach einem geeigneten Verfahren, z.B. nach Patent CH 455 856, aufgebrachten Diffusionsbarriere aus Titankarbid von 6 um Schichtdicke, Laufringen aus Wälzlagerstahl 100 Cr 6 und molybdän-disulfidbeschichteten Bronzekäfigen eingesetzt werden. Falls is das System mit klassischen Schmierstoffen, Oelen oder Fetten To improve the service life of fast-rotating x-ray anodes or anti-cathodes, ball bearings 10 according to the invention can be made with hard metal balls using a suitable method, e.g. according to patent CH 455 856, applied diffusion barrier made of titanium carbide with a layer thickness of 6 .mu.m, races made of bearing steel 100 Cr 6 and molybdenum disulfide-coated bronze cages. If the system is with classic lubricants, oils or greases

624 741 624 741

geschmiert wird, haben die erfindungsgemässen Lager aufgrund des geringen Reibungskoeffizienten Titankarbid gegen Stahl den Vorteil ausgezeichneter Notlaufeigenschaften. is lubricated, the bearings according to the invention have the advantage of excellent emergency running properties due to the low friction coefficient of titanium carbide against steel.

3. Lagerelemente für Weltraumanwendungen müssen gegen Verschweissen geschützt werden. Dazu sollen sie auf Grund der geringen zur Verfügung stehenden Energien ein sehr kleines Anlaufmoment haben. 3. Bearing elements for space applications must be protected against welding. For this, they should have a very small starting torque due to the low available energies.

Kugellager gemäss Erfindung mit titankarbidbeschichteten Hartmetallkugeln, Stahlringe aus rostfreiem Stahl 440 C und Bronzekäfigen, weisen die für Weltraumanwendungen notwendigen physico-chemischen Eigenschaften, wie niedriger Reibungskoeffizient (achtmal kleiner als derjenige von Stahl gegen Stahl), auf, und die geringe Löslichkeit von Stahl gegen Titankarbid verhindert die Kaltverschweissung der Rollreibepartner. Ball bearings according to the invention with titanium carbide-coated hard metal balls, steel rings made of 440 C stainless steel and bronze cages have the physico-chemical properties required for space applications, such as a low coefficient of friction (eight times smaller than that of steel against steel) and the low solubility of steel against titanium carbide prevents cold welding of the roller friction partners.

B B

Claims (9)

624 741624 741 1. Präzisionswälzlager, gekennzeichnet dadurch, dass die Rollelemente aus Hartmetall bestehen, die mit einer Diffusionsbarriere aus einem verschleissfesten Hartstoff mit niedrigem Reibungskoeffizienten gegenüber dem Ringmaterial beschichtet sind. 1. Precision roller bearing, characterized in that the rolling elements consist of hard metal, which are coated with a diffusion barrier made of a wear-resistant hard material with a low coefficient of friction compared to the ring material. 2. Präzisionswälzlager nach Patentanspruch 1, dadurch gekennzeichnet, dass die Beschichtung der Rollelemente aus Karbiden und (oder) Nitriden und (oder) Karbonitriden und (oder) Boriden und (oder) Siliziden und (oder) Oxyden von Metallen der Gruppe III - VI des periodischen Systems der Elemente in Form einer Mischung oder eines Mischkristalls besteht. 2. Precision roller bearing according to claim 1, characterized in that the coating of the rolling elements made of carbides and (or) nitrides and (or) carbonitrides and (or) borides and (or) silicides and (or) oxides of metals from group III - VI of periodic system of elements in the form of a mixture or a mixed crystal. 2 2nd PATENTANSPRÜCHE PATENT CLAIMS 3. Präzisions-Wälzlagernach Patentanspruch 1 oder 2, dadurch gekennzeichnet, dass die Laufringe aus Stahl bestehen. 3. Precision rolling bearings according to claim 1 or 2, characterized in that the races are made of steel. 4. Präzisions-Wälzlager nach Patentanspruch 1 oder 2, dadurch gekennzeichnet, dass die Laufringe aus hochwarmfe-sten Legierungen, insbesondere Hartmetallen bestehen. 4. Precision rolling bearing according to claim 1 or 2, characterized in that the races are made of high-temperature alloys, in particular hard metals. 5. Präzisions-Wälzlager nach Patentanspruch 1 oder 2, dadurch gekennzeichnet, dass die Laufringe aus korrosionsfesten Legierungen bestehen. 5. Precision rolling bearing according to claim 1 or 2, characterized in that the races are made of corrosion-resistant alloys. 6. Präzisions-Wälzlager nach Patentanspruch 1 oder 2, dadurch gekennzeichnet, dass die Laufringe aus keramischen oder keramisch-metallischen Materialien bestehen. 6. Precision rolling bearing according to claim 1 or 2, characterized in that the races are made of ceramic or ceramic-metallic materials. 7. Präzisionswälzlager nach Patentanspruch 1 oder 2, dadurch gekennzeichnet, dass die Käfige aus metallischen oder nichtmetallischen Materialien mit oder ohne selbstschmierende Füllstoffe oder Beschichtungen bestehen. 7. Precision roller bearing according to claim 1 or 2, characterized in that the cages consist of metallic or non-metallic materials with or without self-lubricating fillers or coatings. 8. Präzisionswälzlager nach Patentanspruch 1 oder 2, dadurch gekennzeichnet, dass die Käfige aus Kunststoffen mit oder ohne selbstschmierende Füllstoffe oder Beschichtungen bestehen. 8. Precision roller bearing according to claim 1 or 2, characterized in that the cages consist of plastics with or without self-lubricating fillers or coatings. 9. Präzisionswälzlager nach Patentansprüchen 1 bis 8, entsprechend AFBMA-Normen ABEC 1-9. 9. Precision roller bearings according to patent claims 1 to 8, according to AFBMA standards ABEC 1-9.
CH80277A 1977-01-21 1977-01-21 Precision rolling bearing CH624741A5 (en)

Priority Applications (11)

Application Number Priority Date Filing Date Title
CH80277A CH624741A5 (en) 1977-01-21 1977-01-21 Precision rolling bearing
AT0370277A AT381995B (en) 1977-01-21 1977-05-24 HIGH PRECISION ROLLER BEARING
NL7800108A NL7800108A (en) 1977-01-21 1978-01-04 PRECISION BALL BEARINGS INTENDED TO BE USED UNDER EXTREME CONDITIONS.
DE2800854A DE2800854C2 (en) 1977-01-21 1978-01-10 High-precision rolling bearings for extreme conditions
DE7800563U DE7800563U1 (en) 1977-01-21 1978-01-10 PRECISION ROLLING BEARING FOR EXTREME CONDITIONS
IT47599/78A IT1101903B (en) 1977-01-21 1978-01-11 PRECISION BALL BEARINGS FOR EXTREME CONDITIONS
SE7800545A SE440259B (en) 1977-01-21 1978-01-17 HIGH PRECISION ROLLING STOCK WHERE THE ROLLING ELEMENT IS COVERED WITH A TITAN CARBID DIFFUSION LOCK
GB2232/78A GB1589041A (en) 1977-01-21 1978-01-19 Bearings
FR7802808A FR2378204A1 (en) 1977-01-21 1978-01-19 PRECISION BEARINGS FOR EXTREME CONDITIONS
BE1008657A BE863101A (en) 1977-01-21 1978-01-20 PRECISION BEARINGS FOR EXTREME CONDITIONS
JP572878A JPS53131285A (en) 1977-01-21 1978-01-21 Precision roller bearing applicable under extreme conditions

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH80277A CH624741A5 (en) 1977-01-21 1977-01-21 Precision rolling bearing

Publications (1)

Publication Number Publication Date
CH624741A5 true CH624741A5 (en) 1981-08-14

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ID=4195523

Family Applications (1)

Application Number Title Priority Date Filing Date
CH80277A CH624741A5 (en) 1977-01-21 1977-01-21 Precision rolling bearing

Country Status (10)

Country Link
JP (1) JPS53131285A (en)
AT (1) AT381995B (en)
BE (1) BE863101A (en)
CH (1) CH624741A5 (en)
DE (2) DE2800854C2 (en)
FR (1) FR2378204A1 (en)
GB (1) GB1589041A (en)
IT (1) IT1101903B (en)
NL (1) NL7800108A (en)
SE (1) SE440259B (en)

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Also Published As

Publication number Publication date
IT7847599A0 (en) 1978-01-11
NL7800108A (en) 1978-07-25
IT1101903B (en) 1985-10-07
DE2800854A1 (en) 1978-07-27
SE7800545L (en) 1978-07-22
FR2378204B1 (en) 1982-10-15
ATA370277A (en) 1986-05-15
DE2800854C2 (en) 1983-08-18
AT381995B (en) 1986-12-29
SE440259B (en) 1985-07-22
JPS5647950B2 (en) 1981-11-12
FR2378204A1 (en) 1978-08-18
DE7800563U1 (en) 1978-06-08
GB1589041A (en) 1981-05-07
BE863101A (en) 1978-05-16
JPS53131285A (en) 1978-11-15

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