EP4214580B1 - Mikromechanische komponente, insbesondere eine uhrentriebfeder, insbesondere eine hemmungstriebfeder, mit optimierter kontaktfläche - Google Patents

Mikromechanische komponente, insbesondere eine uhrentriebfeder, insbesondere eine hemmungstriebfeder, mit optimierter kontaktfläche

Info

Publication number
EP4214580B1
EP4214580B1 EP21769740.8A EP21769740A EP4214580B1 EP 4214580 B1 EP4214580 B1 EP 4214580B1 EP 21769740 A EP21769740 A EP 21769740A EP 4214580 B1 EP4214580 B1 EP 4214580B1
Authority
EP
European Patent Office
Prior art keywords
mobile
substrate
phosphorus
nickel
coating
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
EP21769740.8A
Other languages
English (en)
French (fr)
Other versions
EP4214580A1 (de
Inventor
Serge Nicoud
Samuel VIGNIER
Sébastien RODER
Jean-Luc Helfer
Christian Charbon
Frédéric Kohler
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.)
ETA SA Manufacture Horlogere Suisse
Original Assignee
ETA SA Manufacture Horlogere Suisse
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 ETA SA Manufacture Horlogere Suisse filed Critical ETA SA Manufacture Horlogere Suisse
Publication of EP4214580A1 publication Critical patent/EP4214580A1/de
Application granted granted Critical
Publication of EP4214580B1 publication Critical patent/EP4214580B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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

Definitions

  • the invention relates to a micromechanical component, in particular a clockwork mechanism with an optimized surface, in particular an escapement mechanism.
  • the invention further relates to a watch escapement mechanism comprising at least one non-magnetic moving part constituting an escape wheel or an anchor.
  • the invention relates to the field of watchmaking mechanisms, and more particularly to escapement mechanisms comprising at least one escape wheel and at least one anchor, of which at least one is non-magnetic.
  • the Swiss lever escapement wheels are historically made of nickel-plated steel, and are sensitive to magnetic fields.
  • WO 2008/052 378 A2 discloses the example of a watch part made from a material containing nickel and phosphorus, and coated on the surface with another material.
  • the invention aims to solve the technical problem of the holding of the usual watch lubricant, and more particularly to guarantee an epilame effect, under usual climatic conditions, on components made of LIGA NiP12, or similar, non-ferromagnetic, in particular on Swiss lever escapement wheels.
  • the invention relates to a micromechanical component whose surface is optimized, in particular a watch movement, in particular an escapement movement, according to claim 1.
  • the invention further relates to a clockwork escapement mechanism comprising at least one such moving part constituting an escape wheel or an anchor.
  • the invention relates to the field of micromechanical components, and more particularly to watch movements.
  • the invention aims to solve in particular the technical problem of the holding of the usual watch lubricant, under usual climatic conditions, on components made of LIGA NiP12, or similar, non-ferromagnetic, in particular on wheels of a Swiss lever escapement mechanism.
  • the main problem is the loss of epilame effect on the exhaust wheel board, which causes oil to spread and loss of lubrication at the contact between the wheel tooth and the ruby lift.
  • the stability of the lubrication at the contact between the anchor levers and the escape wheel must ensure the consistency of the amplitude.
  • a coating in the form of a layer of galvanic nickel (Ni) preferably, or of chemical nickel (for example NiP6-9), or even of nickel-boron deposited by chemical means, on a LIGA NiP12 escape wheel greatly improves the performance of the movements.
  • the galvanic nickel coating can be an alloy, for example Ni-Fe, or Ni-W, or other.
  • the invention relates to a micromechanical component, in particular a watch movement.
  • This component is advantageously produced by a watch movement manufacturing process, according to which a substrate is made with a first material comprising at least nickel and phosphorus, this substrate is shaped to the geometry of the movement, and a coating is made of the substrate, by galvanic and/or chemical means, at the level of at least one surface of the substrate of the movement, with at least a second material of thin thickness, in particular less than 10 micrometers, which constitutes a peripheral layer of the movement at the level of this at least one surface of the substrate of the movement, and which comprises only nickel and boron.
  • this first material is non-magnetic.
  • this second material is non-magnetic. More precisely, it exhibits a non-magnetic character.
  • nickel is not non-magnetic, and that NiP6-9% is not necessarily so; it is the thinness of the deposit that gives the part its non-magnetic character.
  • the substrate is a nickel-phosphorus of NiPx formulation, with x between 1% and 15% by mass, or more particularly with x between 10% and 15% by mass, the latter range making it possible to guarantee the non-magnetic character of the coating.
  • the coating covering the substrate is low in phosphorus and its thickness is not limited to between 0.2 micrometers and 10.0 micrometers, and, more particularly, between 0.2 micrometers and 2.0 micrometers.
  • the coating has a thickness of 0.5 micrometers.
  • the coating treatment with a low-phosphorus coating can be carried out by galvanic means.
  • the recoating treatment with a low or zero phosphorus coating according to the invention can be done chemically, according to a chemical nickel application process, which can be pure nickel, or a low phosphorus nickel-phosphorus, for example NiP6-9, with 6% to 9% by mass of phosphorus, or even a nickel-boron NiB.
  • a chemical nickel application process which can be pure nickel, or a low phosphorus nickel-phosphorus, for example NiP6-9, with 6% to 9% by mass of phosphorus, or even a nickel-boron NiB.
  • NiP6-9, or NiB increases the stability of the epilame in all climatic conditions, the grip of the epilame and therefore the resistance of any common watch lubricant.
  • the epilame used is a fluoride-based formulation.
  • the lubricant can also be deposited on an exhaust valve with a supplement in the form of a paste based on molybdenum disulfide MoS2, which acts as a lubricant and lubricant sponge.
  • the escapement mechanism in question has a geometry that minimizes the contact surfaces; for example, preference is given to using a cradled anchor, which is an anchor whose active faces of the fork, intended to come into contact with the pallet fork pin and the stops, are rounded, which allows for a point of contact instead of a line of contact.
  • a cradled anchor which is an anchor whose active faces of the fork, intended to come into contact with the pallet fork pin and the stops, are rounded, which allows for a point of contact instead of a line of contact.
  • An innovative design of an escapement mechanism includes an anchor made of LIGA, or an anchor whose pallets are at least made of LIGA. In such a case, the LIGA parts of the anchor are subject to the same problem, and the same solution is applicable.
  • this coating of the substrate is applied, at least on one surface adjacent to a friction surface of the moving part, with this at least one second material, which constitutes a peripheral layer of the moving part at the level of this at least one surface adjacent to a friction surface.
  • adjacent we mean that the two surfaces are contiguous, or at least tangent, their intersection is not empty, even if it is limited to an isthmus of very small section.
  • This micromechanical component and more particularly this clockwork mechanism, comprises a substrate made of a first material containing at least nickel and phosphorus. According to the invention, this substrate is coated, at at least one surface of the clockwork mechanism's substrate, with a coating of a second material containing only nickel and boron, and the second material constitutes the peripheral layer of the clockwork mechanism at at least one surface of the substrate.
  • the substrate coating covers the substrate on surfaces of the moving part other than the surfaces that guide the moving part for its pivoting or for its guidance along a single degree of freedom. More specifically still, the substrate coating covers the substrate on all surfaces of the moving part other than the guide surfaces.
  • the substrate is covered, at the level of at least one surface adjoining a rubbing surface of the mobile, by a coating of a second material comprising only nickel and boron, and the second material constitutes the peripheral layer of the mobile at the level of at least one surface adjoining a rubbing surface.
  • the substrate coating covers the substrate at all surfaces adjacent to the friction surfaces of the mobile other than the surfaces guiding the mobile for its pivoting or for its guidance according to a single degree of freedom.
  • the substrate coating covers the substrate on all surfaces adjacent to the mobile's friction surfaces, including the guiding surfaces of the mobile for its pivoting or for its guidance according to a single degree of freedom.
  • the first material consists solely of nickel and phosphorus.
  • the second material is chosen with a phosphorus mass proportion less than or equal to 15%. More specifically, the second non-magnetic material is chosen with a phosphorus mass proportion between 10% and 15%.
  • the second material is chosen with a phosphorus mass content between 6% and 12%. In another unclaimed alternative, the second material is chosen with a phosphorus mass content between 1% and 6%. In yet another unclaimed alternative, the second material is chosen with a phosphorus mass content less than or equal to 1%.
  • the second material consists solely of nickel and phosphorus.
  • the second material contains boron.
  • the second material contains only nickel and boron.
  • the second material consists of pure nickel.
  • the coating has a thickness of less than 10 micrometers. More specifically, the coating has a thickness of less than 5 micrometers. Even more specifically, the coating has a thickness between 0.2 micrometers and 2.0 micrometers.
  • the invention also relates to a clockwork mechanism, in particular but not limited to an escapement mechanism.
  • the clockwork escapement mechanism comprises at least one such moving part, for example, formed by an escape wheel or an anchor.
  • This mobile comprises a substrate made of a first material comprising at least nickel and phosphorus, the substrate being covered, at all surfaces adjoining the rubbing surfaces of the mobile, by a coating made of a second material comprising only nickel and boron.
  • the second material constitutes the peripheral layer of the mobile at the level of the surfaces adjoining the friction surfaces that the mobile has to cooperate with an anchor or an escape wheel or a balance wheel.
  • the moving part can advantageously receive a lubricating substance on its friction surfaces, for example, a synthetic oil or grease suitable for precision microtechnical applications, familiar to watchmakers.
  • a lubricating substance can be combined with a paste based on molybdenum disulfide (MoS2).

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Lubricants (AREA)
  • Gears, Cams (AREA)
  • Micromachines (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
  • Electromechanical Clocks (AREA)

Claims (10)

  1. Uhrwerksdrehteil, umfassend ein Substrat aus einem ersten Material, umfassend zumindest Nickel und Phosphor, dadurch gekennzeichnet, dass das Substrat auf zumindest einer seiner Oberflächen mit einer Plattierung aus einem zweiten Material, das nur Nickel und Bor umfasst, bedeckt ist, und dass das zweite Material eine periphere Schicht des Drehteils auf der zumindest einen Oberfläche des Substrats des Drehteils bildet.
  2. Drehteil nach Anspruch 1, dadurch gekennzeichnet, dass das Substrat auf zumindest einer Oberfläche, die an eine Reibungsoberfläche des Drehteils angrenzt, mit einer Plattierung aus dem zweiten Material bedeckt ist, welche die periphere Schicht des Drehteils auf der zumindest einen Oberfläche bildet, die an eine Reibungsoberfläche des Drehteils angrenzt.
  3. Drehteil nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das erste Material Phosphor mit einem Gewichtsanteil zwischen 1 % und 15 % umfasst.
  4. Drehteil nach Anspruch 3, dadurch gekennzeichnet, dass das erste Material nichtmagnetisch ist und Phosphor mit einem Gewichtsanteil an Phosphor zwischen 10 % und 15 % umfasst.
  5. Drehteil nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass das erste Material nur Nickel und Phosphor umfasst.
  6. Drehteil nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass das zweite Material eine Dicke von weniger als 10 Mikrometern aufweist.
  7. Drehteil nach Anspruch 6, dadurch gekennzeichnet, dass das zweite Material eine Dicke im Bereich von zwischen 0,2 Mikrometern und 2,0 Mikrometern aufweist.
  8. Horologischer Hemmungsmechanismus, umfassend zumindest ein Drehteil nach einem der Ansprüche 1 bis 7, das ein Hemmungsrad oder einen Anker bildet.
  9. Mechanismus nach Anspruch 8, umfassend eine Schmiersubstanz auf den Reibungsoberflächen des Drehteils.
  10. Mechanismus nach Anspruch 9, umfassend eine Epilamschicht auf zumindest einer Oberfläche der Plattierung, die nicht eine ihrer Reibungsoberflächen ist.
EP21769740.8A 2020-09-15 2021-08-31 Mikromechanische komponente, insbesondere eine uhrentriebfeder, insbesondere eine hemmungstriebfeder, mit optimierter kontaktfläche Active EP4214580B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP20196229.7A EP3968096B1 (de) 2020-09-15 2020-09-15 Mikromechanische komponente, insbesondere eine uhrentriebfeder, insbesondere eine hemmungstriebfeder, mit optimierter kontaktfläche
PCT/EP2021/074026 WO2022058159A1 (fr) 2020-09-15 2021-08-31 Composant de micromecanique, notamment un mobile d'horlogerie, notamment un mobile d'echappement, dont la surface est optimisee

Publications (2)

Publication Number Publication Date
EP4214580A1 EP4214580A1 (de) 2023-07-26
EP4214580B1 true EP4214580B1 (de) 2025-12-24

Family

ID=72521412

Family Applications (2)

Application Number Title Priority Date Filing Date
EP20196229.7A Active EP3968096B1 (de) 2020-09-15 2020-09-15 Mikromechanische komponente, insbesondere eine uhrentriebfeder, insbesondere eine hemmungstriebfeder, mit optimierter kontaktfläche
EP21769740.8A Active EP4214580B1 (de) 2020-09-15 2021-08-31 Mikromechanische komponente, insbesondere eine uhrentriebfeder, insbesondere eine hemmungstriebfeder, mit optimierter kontaktfläche

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP20196229.7A Active EP3968096B1 (de) 2020-09-15 2020-09-15 Mikromechanische komponente, insbesondere eine uhrentriebfeder, insbesondere eine hemmungstriebfeder, mit optimierter kontaktfläche

Country Status (6)

Country Link
US (1) US20230305492A1 (de)
EP (2) EP3968096B1 (de)
JP (1) JP7649374B2 (de)
KR (1) KR102848471B1 (de)
CN (1) CN116018564B (de)
WO (1) WO2022058159A1 (de)

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH514873A (fr) * 1969-07-11 1971-07-15 Far Fab Assortiments Reunies Procédé de fabrication d'une ancre d'horlogerie
JPS5740669A (en) * 1980-08-25 1982-03-06 Citizen Watch Co Ltd Watch hand and manuacture thereof
JP3269090B2 (ja) * 1991-05-21 2002-03-25 セイコーエプソン株式会社 時 計
EP2082014B1 (de) * 2006-11-02 2018-02-14 Rolex Sa Watch
US20080123475A1 (en) * 2006-11-28 2008-05-29 Seiko Epson Corporation Timepiece component and timepiece having the timepiece component
EP2586879A1 (de) * 2011-10-27 2013-05-01 Nivarox-FAR S.A. Verfahren zur thermischen Behandlung von mikromechanischen Bauteilen von Uhren
EP2706416B1 (de) * 2012-09-07 2015-11-18 The Swatch Group Research and Development Ltd Flexibler Anker mit konstanter Kraft
EP2945025B1 (de) * 2014-05-16 2018-02-07 Nivarox-FAR S.A. Uhrwerksmechanismus mit ungeschmierter Kontaktkupplung
EP2952971B1 (de) * 2014-06-05 2016-10-12 Nivarox-FAR S.A. Anker für Hemmungsmechanismus eines Uhrwerks
EP3171229A1 (de) * 2015-11-19 2017-05-24 Nivarox-FAR S.A. Uhrwerkskomponente
EP3171230B1 (de) * 2015-11-19 2019-02-27 Nivarox-FAR S.A. Uhrwerkkomponente mit verbesserter tribologie
WO2017102661A1 (fr) * 2015-12-18 2017-06-22 Rolex Sa Procede de fabrication d'un composant horloger
EP3273306B1 (de) * 2016-07-19 2025-08-27 Nivarox-FAR S.A. Bauteil für uhrwerk
EP3273303B1 (de) * 2016-07-19 2025-10-01 Nivarox-FAR S.A. Bauteil für uhrwerk
EP3273307B1 (de) * 2016-07-19 2025-04-30 Nivarox-FAR S.A. Bauteil für uhrwerk
CH712719B1 (fr) * 2016-07-19 2020-12-15 Nivarox Sa Composant horloger pour mouvement d'horlogerie.
EP3290451B1 (de) * 2016-09-01 2021-08-18 The Swatch Group Research and Development Ltd. Substrat, das eine mit epilamisierungsmittel beschichtete oberfläche umfasst, und epilamisierungsverfahren eines solchen substrats

Also Published As

Publication number Publication date
KR20230047479A (ko) 2023-04-07
KR102848471B1 (ko) 2025-08-20
CN116018564B (zh) 2026-02-13
CN116018564A (zh) 2023-04-25
JP7649374B2 (ja) 2025-03-19
EP3968096A1 (de) 2022-03-16
JP2023539069A (ja) 2023-09-13
EP4214580A1 (de) 2023-07-26
WO2022058159A1 (fr) 2022-03-24
US20230305492A1 (en) 2023-09-28
EP3968096B1 (de) 2026-04-01

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