EP3171230B1 - Uhrwerkkomponente mit verbesserter tribologie - Google Patents

Uhrwerkkomponente mit verbesserter tribologie Download PDF

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Publication number
EP3171230B1
EP3171230B1 EP15195386.6A EP15195386A EP3171230B1 EP 3171230 B1 EP3171230 B1 EP 3171230B1 EP 15195386 A EP15195386 A EP 15195386A EP 3171230 B1 EP3171230 B1 EP 3171230B1
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EP
European Patent Office
Prior art keywords
component
surface layer
solution
pin
boric acid
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.)
Active
Application number
EP15195386.6A
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English (en)
French (fr)
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EP3171230A1 (de
Inventor
Christian Charbon
Philippe Dubois
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.)
Nivarox Far SA
Nivarox SA
Original Assignee
Nivarox Far SA
Nivarox SA
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 Nivarox Far SA, Nivarox SA filed Critical Nivarox Far SA
Priority to EP15195386.6A priority Critical patent/EP3171230B1/de
Priority to US15/337,060 priority patent/US20170146955A1/en
Priority to JP2016214141A priority patent/JP6231644B2/ja
Priority to CN201611011906.9A priority patent/CN106919036B/zh
Priority to RU2016145143A priority patent/RU2718342C1/ru
Publication of EP3171230A1 publication Critical patent/EP3171230A1/de
Application granted granted Critical
Publication of EP3171230B1 publication Critical patent/EP3171230B1/de
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Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B15/00—Escapements
    • G04B15/14—Component parts or constructional details, e.g. construction of the lever or the escape wheel
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B31/00—Bearings; Point suspensions or counter-point suspensions; Pivot bearings; Single parts therefor
    • G04B31/08—Lubrication
    • G—PHYSICS
    • G04—HOROLOGY
    • G04D—APPARATUS OR TOOLS SPECIALLY DESIGNED FOR MAKING OR MAINTAINING CLOCKS OR WATCHES
    • G04D3/00—Watchmakers' or watch-repairers' machines or tools for working materials
    • G04D3/0074—Watchmakers' or watch-repairers' machines or tools for working materials for treatment of the material, e.g. surface treatment
    • G04D3/0087—Watchmakers' or watch-repairers' machines or tools for working materials for treatment of the material, e.g. surface treatment for components of the escapement mechanism, e.g. lever escapement, escape wheel

Definitions

  • the invention relates to a timepiece component comprising at least one self-lubricating surface layer.
  • the invention also relates to a clock escapement mechanism comprising at least one such component.
  • the invention also relates to a watch movement comprising at least one such escape mechanism.
  • the invention further relates to a watch having at least one movement.
  • the invention further relates to a method of coating a timepiece component with a self-lubricating surface layer.
  • the invention relates to the field of watch mechanism components subjected to intense use, with a high pulse frequency, and a large number of pulses and friction phases during their service, such as exhaust mechanism components.
  • the porous metal comprises copper, tin and graphite, and may contain a solid lubricant such as boric acid or salicylic acid, useful in particular during pressing or sintering.
  • Boric acid H 3 BO 3 is of particular interest in friction because of its ability to lubricate dry. During friction, the planar crystalline meshes of boric acid tend to self-level into sheets parallel to the surface. This arrangement reduces friction similarly to more well known compounds such as MoS 2 molybdenum sulphide and WS 2 tungsten sulphide.
  • the invention aims at a non-lubricated operation of the watch exhaust, in order to reduce maintenance, and to allow high oscillation frequencies.
  • the invention relates to a timepiece component comprising at least one self-lubricating surface layer, according to claim 1.
  • the invention also relates to a clock escapement mechanism comprising at least one such component.
  • the invention also relates to a watch movement comprising at least one such escape mechanism.
  • the invention further relates to a watch having at least one movement.
  • the invention further relates to a method of coating a timepiece component with a self-lubricating surface layer according to claim 12.
  • the invention proposes, at least for the most stressed components of watchmaking mechanisms, to produce them with a dry, self-lubricating surface layer, for which the use of boric acid H 3 BO 3 is preferred, which is of particular interest in friction, because of its ability to lubricate dry.
  • the invention relates to a timepiece component 1 comprising at least one self-lubricating surface layer 2.
  • this surface layer 2 is a dry layer comprising boric acid H 3 BO 3 and has a thickness of between 10 nanometers and 10 microns.
  • this thickness is between 50 nanometers and 1 micrometer.
  • this surface layer 2 consists entirely of boric acid.
  • the component 1 comprises, under this surface layer 2, a material chosen to provide a very good adhesion of boric acid.
  • the component 1 comprises, under the surface layer 2, a substrate which is either composed of silicon oxide SiO 2 or aluminum oxide Al 2 O 3 , or which is covered with a layer intermediate 3 consisting of silicon oxide SiO 2 or Al 2 O 3 aluminum oxide, or DLC, or the like.
  • a component 1 which is an escape mechanism component, taken from an escape wheel, an anchor, a rocker, a dart, an ellipse, a pallet, a stop of limitation, a plateau, a quill, a rest, a relaxation, a fork, an ankle.
  • the invention also relates to a clock escapement mechanism comprising at least one such component 1.
  • this escapement mechanism 10 comprises such a component 1 which is an escape wheel made of silicon oxide or a mixture of silicon and silicon oxide SiO 2 .
  • the component 1 is made of silicon by DRIE, and then thermally oxidized.
  • the micro-manufacturing of silica or quartz components (crystalline or amorphous SiO 2 ) is not yet completely controlled at present.
  • This escape wheel is coated with such a superficial layer 2 of boric acid, and is arranged to cooperate with other components 1 which are ruby paddles each coated with such a surface layer 2 of boric acid.
  • the invention also relates to a watch movement 100 comprising at least one such escape mechanism 10.
  • the invention also relates to a watch 1000 comprising at least one such movement 100.
  • the invention also relates to a method of coating a timepiece component 1 with a self-lubricating surface layer 2.
  • the thickness of the boric acid layer H 3 BO 3 can also be controlled by the concentration of the solution.
  • the thickness therefore also depends on the concentration of the solution.
  • the repetition of the steps makes it possible to increase the thickness, because the dissolution of the boric acid already formed is relatively slow.
  • this method is applied to a watch exhaust mechanism component 1, emitting or undergoing more than one pulse per second, chosen from an escapement wheel, an anchor, a pendulum, a dart, a ellipse, a palette, a limit stop, a plateau, a star, a rest, a relaxation, a fork, an ankle.
  • the thickness of the boric acid layer is between 50 nanometers and 1 micrometer.
  • the components to be coated with boric acid are typically silicon, silicon and silicon oxide, metals or ceramics. These may have a rough or porous surface, so as to promote adhesion.
  • the typical concentration of the solution is calculated so as to coat the components with a thin layer, more particularly of the order of 100 nm, of solid boric acid.
  • the solubility of the H 3 BO 3 at room temperature being, in the solvent liquids proposed above, higher than the recommended dosage, it is generally not necessary to heat the liquids. However, heating can facilitate dissolution, especially in the case of water that is not flammable.
  • H 3 BO 3 powder is advantageously mixed with the solvent and stirred, and ultrasound may also be used.
  • the component to be coated is soaked in the solution, or sprinkled, then extracted and allowed to dry, so as to avoid contact with the functional parts, for example deposited on a blotting paper.
  • a slight gas blast may be used to hasten the evaporation of the liquid.
  • the component 1 In its final state, the component 1 is covered with the desired surface layer 2.
  • the component 1 is made to have a mirror-polished surface before coating, interference fringes are visible.
  • the small thicknesses of deposited boric acid typically from about 50 nm to 100 nm, do not bring about a marked color change.
  • the passage of a sharp object on the surface may leave a trace indicative of the presence of the layer.
  • the invention allows a non-lubricated operation of a watch exhaust, to reduce maintenance, and allow high oscillation frequencies.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Lubricants (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)

Claims (14)

  1. Uhrenkomponente (1) mit mindestens einer selbstschmierenden Oberflächenschicht (2), dadurch gekennzeichnet, dass die Oberflächenschicht (2) eine vollständig aus Borsäure H3BO3 gebildete Trockenschicht ist und eine Dicke im Bereich von 10 Nanometern bis 10 Mikrometern aufweist.
  2. Komponente (1) nach Anspruch 1, dadurch gekennzeichnet, dass die Komponente (1) unter der Oberflächenschicht (2) ein Substrat aufweist, das aus Siliciumoxid SiO2 oder Aluminiumoxid Al2O3 gebildet ist oder das mit einer Zwischenschicht (3) bedeckt ist, die aus Siliciumoxid SiO2 oder Aluminiumoxid Al2O3 gebildet ist.
  3. Komponente (1) nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Komponente (1) unter der Oberflächenschicht (2) ein Substrat aus Silicium oder Siliciumoxid oder Diamant CVD oder einem anderen Mikrofertigungsmaterial aufweist.
  4. Komponente (1) nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Komponente (1) unter der Oberflächenschicht (2) ein Substrat aus Keramik aufweist.
  5. Komponente (1) nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Komponente (1) unter der Oberflächenschicht (2) ein Substrat aus Stahl oder aus einer kupferhaltigen Legierung oder aus Nickel oder aus einer Nickelverbindung aufweist.
  6. Komponente (1) nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Komponente (1) unter der Oberflächenschicht (2) ein Substrat aus Kunststoff aufweist.
  7. Komponente (1) nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die Komponente (1) eine Hemmungsmechanismuskomponente ist, zu denen ein Hemmungsrad, ein Anker, eine Unruh, ein Sicherheitsstift, eine Ellipse, eine Palette, ein Begrenzungsanschlag, eine Hebelscheibe, ein Sperrstift, eine Ruhe, ein Gesperr, eine Gabel und ein Hebelstein gehören.
  8. Uhrenhemmungsmechanismus (10), umfassend mindestens eine Komponente (1) nach Anspruch 7.
  9. Hemmungsmechanismus (10) nach Anspruch 8, dadurch gekennzeichnet, dass er eine Komponente (1) umfasst, die ein aus Siliciumoxid oder einem Gemisch aus Silicium und Siliciumoxid SiO2 hergestelltes Hemmungsrad ist, beschichtet mit einer Oberflächenschicht (2) aus Borsäure und angeordnet, um mit anderen Komponenten (1) zusammenzuwirken, die Paletten aus Rubin sind, von denen jede mit einer Oberflächenschicht (2) aus Borsäure beschichtet ist.
  10. Uhrwerk (100), umfassend mindestens einen Hemmungsmechanismus (10) nach Anspruch 8 oder 9.
  11. Uhr (1000), umfassend mindestens ein Werk (100) nach Anspruch 10.
  12. Verfahren zum Beschichten einer Uhrenkomponente (1) mit einer selbstschmierenden Oberflächenschicht (2), dadurch gekennzeichnet, dass es für die Herstellung der Schicht die folgenden Schritte umfasst:
    - Lösen der Körner oder des Pulvers von Borsäure H3BO3 in einem Lösungsmittel, ausgewählt aus Wasser, Isopropanol, Propanol, Methanol, Methylpropanol, Ethylenglykol, Glycerin oder Aceton mit einer Dosierung von 0,01 Massen-% bis 1,0 Massen-% bei Raumtemperatur,
    - Mischen und Rühren der Lösung,
    - Eintauchen der zu beschichtenden Komponente (1) in die Lösung oder Aufsprühen der Lösung,
    - im Fall des Eintauchens Entnehmen der Komponente aus der Lösung,
    - Austrocknen der flüssigen Phase, wobei die Oberfläche, die die Oberflächenschicht (2) bildet, auf Abstand von jeglichem Fremdkörper gehalten wird, bis die Austrocknung beendet ist.
  13. Verfahren nach Anspruch 12, dadurch gekennzeichnet, dass die Schritte, die darin bestehen:
    - die zu beschichtende Komponente (1) in die Lösung einzutauchen oder sie mit der Lösung zu besprühen,
    - im Fall des Eintauchens die Komponente aus der Lösung zu entnehmen,
    - die flüssige Phase austrocknen zu lassen, wobei die Oberfläche, die die Oberflächenschicht (2) bildet, auf Abstand von jeglichem Fremdkörper gehalten wird, bis die Austrocknung abgeschlossen ist,
    wiederholt ausgeführt werden bis zum Erhalt einer gewünschten Schichtdicke, die im Bereich von 10 Nanometern bis 10 Mikrometern liegt.
  14. Anwendung des Verfahrens nach Anspruch 12 oder 13 auf die Beschichtung einer Komponente (1) eines Uhrenhemmungsmechanismus, der mehr als einen Impuls pro Sekunde ausgibt oder erfährt, die ausgewählt ist aus einem Hemmungsrad, einem Anker, einer Unruh, einem Sicherheitsstift, einer Ellipse, einer Palette, einem Begrenzungsanschlag, einer Hebelscheibe, einem Sperrstift, einer Ruhe, einem Gesperr, einer Gabel und einem Hebelstein.
EP15195386.6A 2015-11-19 2015-11-19 Uhrwerkkomponente mit verbesserter tribologie Active EP3171230B1 (de)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP15195386.6A EP3171230B1 (de) 2015-11-19 2015-11-19 Uhrwerkkomponente mit verbesserter tribologie
US15/337,060 US20170146955A1 (en) 2015-11-19 2016-10-28 Timepiece component with improved tribology
JP2016214141A JP6231644B2 (ja) 2015-11-19 2016-11-01 トライボロジーが改善された計時器コンポーネント
CN201611011906.9A CN106919036B (zh) 2015-11-19 2016-11-17 具有改进的摩擦的计时器组件
RU2016145143A RU2718342C1 (ru) 2015-11-19 2016-11-18 Часовой компонент с улучшенной самосмазкой

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP15195386.6A EP3171230B1 (de) 2015-11-19 2015-11-19 Uhrwerkkomponente mit verbesserter tribologie

Publications (2)

Publication Number Publication Date
EP3171230A1 EP3171230A1 (de) 2017-05-24
EP3171230B1 true EP3171230B1 (de) 2019-02-27

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EP15195386.6A Active EP3171230B1 (de) 2015-11-19 2015-11-19 Uhrwerkkomponente mit verbesserter tribologie

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US (1) US20170146955A1 (de)
EP (1) EP3171230B1 (de)
JP (1) JP6231644B2 (de)
CN (1) CN106919036B (de)
RU (1) RU2718342C1 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11392091B2 (en) 2017-07-31 2022-07-19 Rolex Sa Watch pivot device
EP3968096A1 (de) * 2020-09-15 2022-03-16 ETA SA Manufacture Horlogère Suisse Mikromechanische komponente, insbesondere eine uhrentriebfeder, insbesondere eine hemmungstriebfeder, mit optimierter kontaktfläche
EP3968095A1 (de) * 2020-09-15 2022-03-16 ETA SA Manufacture Horlogère Suisse Verfahren zur herstellung einer mikromechanischen komponente, insbesondere einer uhrentriebfeder, mit optimierter kontaktfläche
CN113402299A (zh) * 2021-04-27 2021-09-17 北京化工大学 一种提升石墨材料摩擦性能的方法及制备工艺

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Also Published As

Publication number Publication date
CN106919036B (zh) 2019-08-09
RU2718342C1 (ru) 2020-04-02
CN106919036A (zh) 2017-07-04
EP3171230A1 (de) 2017-05-24
US20170146955A1 (en) 2017-05-25
JP6231644B2 (ja) 2017-11-15
JP2017096932A (ja) 2017-06-01

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