EP4214580A1 - Composant de micromécanique, notamment un mobile d'horlogerie, notamment un mobile d'échappement, dont la surface est optimisée - Google Patents
Composant de micromécanique, notamment un mobile d'horlogerie, notamment un mobile d'échappement, dont la surface est optimiséeInfo
- Publication number
- EP4214580A1 EP4214580A1 EP21769740.8A EP21769740A EP4214580A1 EP 4214580 A1 EP4214580 A1 EP 4214580A1 EP 21769740 A EP21769740 A EP 21769740A EP 4214580 A1 EP4214580 A1 EP 4214580A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- mobile
- phosphorus
- substrate
- 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.)
- Granted
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 horological mobile whose surface is optimized, in particular an escapement mobile.
- the invention also relates to a timepiece escapement mechanism comprising at least one non-magnetic mobile constituting an escape wheel or an anchor.
- the invention relates to the field of horological mechanisms, and more particularly to escapement mechanisms comprising at least one escape wheel and at least one anchor, at least one of which is non-magnetic in nature.
- the Swiss lever escapement wheels are historically made of nickel-plated steel, and are sensitive to magnetic fields.
- the invention proposes to solve the technical problem of the behavior of the usual watchmaking lubricant, and more particularly to guarantee an epilame effect, under the usual climatic conditions, on components made of LIGA NiF'12, 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 horological mobile, in particular an escapement mobile, according to claim 1.
- the invention also relates to a timepiece escapement mechanism comprising at least one such mobile constituting an escape wheel or an anchor.
- the invention relates to the field of micromechanical components, and more particularly to horological mobiles.
- the invention proposes to solve in particular the technical problem of the behavior of the usual watchmaking lubricant, in the usual climatic conditions, on components made of LIGA NiP12, or similar, non-ferromagnetic, in particular on wheels of an escapement mechanism. Swiss anchor.
- the contact between the ruby lever of the anchor and the tooth of the escapement wheel is particularly sensitive, as is the contact between the fork and the plate peg. or between the fork and the anchor stops.
- this involves ensuring the presence of lubricant on the contact surfaces between the escape wheel and the pallet, and reducing the aging of the escape wheel and the pallet.
- the main problem is the loss of epilame effect on the escape wheel plate, which causes oil spreading and loss of lubrication at the contact between the wheel tooth and the ruby lift.
- the stability of the lubrication in contact between the lifts of the anchor and the escapement wheel must make it possible to guarantee the constancy of the amplitude.
- a coating in the form of a layer of galvanic nickel (Ni) preferentially, or of chemical nickel (for example NiP6-9), or else of nickel-boron deposited by chemical means, on a LIGA NiP12 escape wheel greatly improves movement performance.
- the galvanic nickel coating may be an alloy, for example Ni-Fe, or Ni-W, or other.
- the invention relates to a micromechanical component, in particular a horological mobile.
- This component can advantageously be produced by a process for manufacturing a watch mobile, according to which a substrate is produced with a first material comprising at least nickel and phosphorus, this substrate is shaped to the geometry of the mobile, and a coating of the substrate, by galvanic and/or chemical means, at the level of at least one surface of the substrate of the mobile, with at least one second material of low thickness, in particular less than 10 micrometers, which constitutes a peripheral layer of the mobile at level of this at least one surface of the mobile substrate, and which comprises at least nickel and which is poorer in phosphorus than the first material, or which comprises nickel and is devoid of phosphorus.
- this first material is non-magnetic.
- this second material is non-magnetic. More precisely, it has an amagnetic character. We note that nickel is not non-magnetic, and that NiP6-9% is not necessarily so, it is the low thickness of the deposit which 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, this latter range making it possible to guarantee the non-magnetic nature 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 still between 0.2 micrometers and 2.0 micrometers.
- the coating has a thickness of 0.5 micrometer.
- the coating treatment with a coating low in phosphorus, according to the invention, can be done by galvanic means.
- the coating treatment with a low or zero phosphorus coating can be done chemically, according to a method of applying chemical nickel, which can be pure nickel, or a nickel-phosphorus low in phosphorus, for example NiP6-9, with 6% to 9% by mass of phosphorus, or even a nickel-boron NiB.
- chemical nickel which can be pure nickel, or a nickel-phosphorus low in phosphorus, for example NiP6-9, with 6% to 9% by mass of phosphorus, or even a nickel-boron NiB.
- the epilame used is a fluorine-based formulation.
- the lubricant can also be deposited on an escapement wheel set with a supplement in the form of a paste based on molybdenum disulphide MoS2, which acts as a lubricant and a lubricant sponge.
- the escapement wheel concerned has a geometry making it possible to reduce the contact surfaces to a minimum, for example the use of a cradled anchor is preferred, which is an anchor whose active faces of the fork, intended to come into contact with the chainring pin and the stops, are rounded, which makes it possible to have a point of contact instead of a line of contact.
- a cradled anchor is preferred, which is an anchor whose active faces of the fork, intended to come into contact with the chainring pin and the stops, are rounded, which makes it possible to have a point of contact instead of a line of contact.
- An innovative embodiment of the escapement mechanism includes an anchor in LIGA, or an anchor whose pallets at least are in LIGA.
- the LIGA parts of the anchor are subject to the same problem, and the same solution is applicable.
- the invention makes it possible to guarantee normal aging conditions, a constant amplitude, and the absence of shutdown, in particular in the presence of cradled LIGA nickel-phosphorus anchors, which provide better shock resistance than anchors silicon, for example.
- a method for manufacturing such a micromechanical component, in particular a watch mobile is implemented, according to which:
- a substrate is manufactured with a first material comprising at least nickel and phosphorus
- This substrate is coated, at at least one surface of the mobile substrate, with at least one second material which constitutes a peripheral layer of the mobile at this at least one surface of the substrate;
- This at least one second material comprises at least nickel, and is poorer in phosphorus than the first material, or else this at least one second material comprises nickel and is devoid of phosphorus.
- this coating of the substrate is carried out, at the level of at least one surface adjoining a friction surface of the mobile, with this at least one second material, which constitutes a peripheral layer of the mobile at the level of this at least one surface adjoining a rubbing surface.
- “adjoining” 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.
- Such a micromechanical component in particular a watch mobile, thus comprises an optimized surface.
- This micromechanical component and more particularly this clockwork mobile, comprises a substrate in a first material comprising at least nickel and phosphorus. According to the invention, this substrate is covered, at at least one surface of the mobile substrate, by a coating of a second material comprising at least nickel and poorer in phosphorus than the first material, or devoid of phosphorus , and the second material constitutes the peripheral layer of the mobile at the level of the at least one surface of the substrate.
- the coating of the substrate covers the substrate at surfaces of the mobile other than the guide surfaces of the mobile for its pivoting or for its guidance according to a single degree of freedom. More particularly still, the coating of the substrate covers the substrate at the level of all the surfaces of the mobile other than the guide surfaces.
- the substrate is covered, at at least one surface adjoining a friction surface of the mobile, by a coating of a second material comprising at least nickel and poorer in phosphorus than the first material, or devoid of phosphorus , and the second material constitutes the peripheral layer of the mobile at the level of the at least one surface adjoining a friction surface.
- the coating covers the substrate at the level of at least one surface adjoining rubbing surfaces of the mobile other than the guide surfaces of the mobile for its pivoting or for its guidance according to a single degree of freedom.
- the coating of the substrate covers the substrate at the level of all the surfaces adjoining the friction surfaces of the mobile other than the guide surfaces of the mobile for its pivoting or for its guidance according to a single degree of freedom.
- the coating of the substrate covers the substrate at all the surfaces adjoining the rubbing surfaces of the mobile including the mobile guide surfaces for its pivoting or for its guidance according to a single degree of freedom.
- the coating of the substrate covers the substrate at the level of all the surfaces of the mobile including the guide surfaces of the mobile for its pivoting or for its guidance according to a single degree of freedom.
- the first material comprises only nickel and phosphorus.
- the first material comprises phosphorus with a mass proportion of between 1% and 15%. More particularly still, the first material is non-magnetic and comprises phosphorus with a mass proportion of phosphorus of between 10% and 15%.
- the second material is chosen with a phosphorus mass proportion of less than or equal to 15%. More particularly, the second non-magnetic material is chosen with a mass proportion of phosphorus of between 10% and 15%.
- the second material is chosen with a mass proportion of phosphorus of between 6% and 12%. In another alternative, the second material is chosen with a mass proportion of phosphorus of between 1% and 6%. In yet another alternative, the second material is chosen with a phosphorus mass proportion of less than or equal to 1%.
- the second material comprises only nickel and phosphorus.
- the second material comprises boron. More particularly still, the second material comprises only nickel and boron.
- the second material consists of pure nickel.
- the coating has a thickness of less than 10 micrometers. More particularly still, the coating has a thickness of less than 5 micrometers. Even more particularly, the coating has a thickness comprised between 0.2 micrometer and 2.0 micrometer.
- the thickness of the coating is 0.5 micrometer.
- the coating is applied with a thickness of less than 0.2 micrometer, in particular in the vicinity of 0.1 micrometer.
- the invention also relates to a clockwork mechanism, in particular but not limited to an escapement mechanism.
- the timepiece escapement mechanism comprises at least one such wheel set, 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 the surfaces adjoining the rubbing surfaces of the mobile, by a coating made of a second material comprising at least nickel and being poorer in phosphorus than the first material, or being devoid of phosphorus.
- the second material constitutes the peripheral layer of the mobile at the level of the surfaces adjoining the rubbing surfaces that the mobile has to cooperate with an anchor or an escape wheel or a balance wheel.
- the mobile can advantageously receive, on its friction surfaces, a lubricating substance, for example a synthetic oil or grease suitable for precision microtechnology applications, known to those skilled in the watchmaking profession.
- a lubricating substance for example a synthetic oil or grease suitable for precision microtechnology applications, known to those skilled in the watchmaking profession.
- Such a lubricating substance can be combined with a paste based on molybdenum disulphide MoS2.
- the mobile can advantageously also receive a layer of epilame on at least one surface of the coating other than its friction surfaces in order to allow a better hold of the lubricating substance.
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)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP20196229.7A EP3968096B1 (fr) | 2020-09-15 | 2020-09-15 | Composant de micromécanique, notamment un mobile d horlogerie, notamment un mobile d' échappement, avec surface de contact optimisée |
| 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 true EP4214580A1 (fr) | 2023-07-26 |
| EP4214580B1 EP4214580B1 (fr) | 2025-12-24 |
Family
ID=72521412
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20196229.7A Active EP3968096B1 (fr) | 2020-09-15 | 2020-09-15 | Composant de micromécanique, notamment un mobile d horlogerie, notamment un mobile d' échappement, avec surface de contact optimisée |
| EP21769740.8A Active EP4214580B1 (fr) | 2020-09-15 | 2021-08-31 | Composant de micromécanique, notamment un mobile d'horlogerie, notamment un mobile d'échappement, dont la surface est optimisée |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20196229.7A Active EP3968096B1 (fr) | 2020-09-15 | 2020-09-15 | Composant de micromécanique, notamment un mobile d horlogerie, notamment un mobile d' échappement, avec surface de contact optimisée |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20230305492A1 (fr) |
| EP (2) | EP3968096B1 (fr) |
| JP (1) | JP7649374B2 (fr) |
| KR (1) | KR102848471B1 (fr) |
| CN (1) | CN116018564B (fr) |
| WO (1) | WO2022058159A1 (fr) |
Family Cites Families (17)
| 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 (fr) * | 2006-11-02 | 2018-02-14 | Rolex Sa | Montre |
| US20080123475A1 (en) * | 2006-11-28 | 2008-05-29 | Seiko Epson Corporation | Timepiece component and timepiece having the timepiece component |
| EP2586879A1 (fr) * | 2011-10-27 | 2013-05-01 | Nivarox-FAR S.A. | Procédé de traitement thermique de pièces micromécaniques horlogères |
| EP2706416B1 (fr) * | 2012-09-07 | 2015-11-18 | The Swatch Group Research and Development Ltd | Ancre flexible à force constante |
| EP2945025B1 (fr) * | 2014-05-16 | 2018-02-07 | Nivarox-FAR S.A. | Mécanisme d'horlogerie à couple de contact sans lubrification |
| EP2952971B1 (fr) * | 2014-06-05 | 2016-10-12 | Nivarox-FAR S.A. | Ancre pour mécanisme d'échappement d'un mouvement de montre |
| EP3171229A1 (fr) * | 2015-11-19 | 2017-05-24 | Nivarox-FAR S.A. | Composant d' horlogerie |
| EP3171230B1 (fr) * | 2015-11-19 | 2019-02-27 | Nivarox-FAR S.A. | Composant d'horlogerie a tribologie amelioree |
| WO2017102661A1 (fr) * | 2015-12-18 | 2017-06-22 | Rolex Sa | Procede de fabrication d'un composant horloger |
| EP3273306B1 (fr) * | 2016-07-19 | 2025-08-27 | Nivarox-FAR S.A. | Pièce pour mouvement d'horlogerie |
| EP3273303B1 (fr) * | 2016-07-19 | 2025-10-01 | Nivarox-FAR S.A. | Pièce pour mouvement d'horlogerie |
| EP3273307B1 (fr) * | 2016-07-19 | 2025-04-30 | Nivarox-FAR S.A. | Pièce pour mouvement d'horlogerie |
| CH712719B1 (fr) * | 2016-07-19 | 2020-12-15 | Nivarox Sa | Composant horloger pour mouvement d'horlogerie. |
| EP3290451B1 (fr) * | 2016-09-01 | 2021-08-18 | The Swatch Group Research and Development Ltd. | Substrat comprenant une surface recouverte d'un agent épilame et procédé d'épilamage d'un tel substrat |
-
2020
- 2020-09-15 EP EP20196229.7A patent/EP3968096B1/fr active Active
-
2021
- 2021-08-31 JP JP2023511636A patent/JP7649374B2/ja active Active
- 2021-08-31 WO PCT/EP2021/074026 patent/WO2022058159A1/fr not_active Ceased
- 2021-08-31 KR KR1020237008248A patent/KR102848471B1/ko active Active
- 2021-08-31 EP EP21769740.8A patent/EP4214580B1/fr active Active
- 2021-08-31 CN CN202180055060.1A patent/CN116018564B/zh active Active
- 2021-08-31 US US18/041,584 patent/US20230305492A1/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| KR20230047479A (ko) | 2023-04-07 |
| EP4214580B1 (fr) | 2025-12-24 |
| KR102848471B1 (ko) | 2025-08-20 |
| CN116018564B (zh) | 2026-02-13 |
| CN116018564A (zh) | 2023-04-25 |
| JP7649374B2 (ja) | 2025-03-19 |
| EP3968096A1 (fr) | 2022-03-16 |
| JP2023539069A (ja) | 2023-09-13 |
| WO2022058159A1 (fr) | 2022-03-24 |
| US20230305492A1 (en) | 2023-09-28 |
| EP3968096B1 (fr) | 2026-04-01 |
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