EP4214581A1 - Procede de fabrication d'un composant de micromecanique, notamment d'un mobile d'horlogerie, dont la surface est optimisee - Google Patents
Procede de fabrication d'un composant de micromecanique, notamment d'un mobile d'horlogerie, dont la surface est optimiseeInfo
- Publication number
- EP4214581A1 EP4214581A1 EP21769741.6A EP21769741A EP4214581A1 EP 4214581 A1 EP4214581 A1 EP 4214581A1 EP 21769741 A EP21769741 A EP 21769741A EP 4214581 A1 EP4214581 A1 EP 4214581A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- mobile
- phosphorus
- substrate
- chosen
- nickel
- 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 method for manufacturing a micromechanical component, in particular a horological mobile.
- 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 watch lubricant, and more particularly to guarantee an epilame effect, under the usual climatic conditions, on components in LIGA NiP12, or similar, non-ferromagnetic, especially on levers and Swiss lever escapement wheels.
- the invention relates to a method of manufacturing watch mobiles according to claim 1.
- 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 the 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 process for manufacturing a micromechanical component, in particular a watch mobile, according to which a substrate is produced with a first material comprising at least nickel and phosphorus, this substrate is shaped by geometry of the mobile, and the substrate is coated, by galvanic and/or chemical means, at the level of at least one surface of the substrate of the mobile, with at least a second thin material, less than 10 micrometers, which constitutes a peripheral layer of the mobile at the level of this at least one surface of the substrate of the mobile, 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 non-magnetic material is chosen.
- this second non-magnetic material is chosen. More precisely, it has an amagnetic character.
- 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 comprised between 1% and 15% by mass, or more particularly with x comprised 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 carried out 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 else 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 else 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 an escapement mechanism comprises 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, 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 process for manufacturing a clockwork 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.
- the substrate is shaped to the geometry of the mobile.
- this coating of the substrate is carried out by galvanic and/or chemical and/or PVD and/or CVD means.
- this coating of the substrate is carried out 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, this coating of the substrate is carried out at all the surfaces of the mobile other than these guide surfaces of the mobile.
- the coating of the substrate is carried out at the surfaces of the mobile including these guide surfaces of the mobile. In yet another variant, this coating is carried out at the level of at least one surface adjoining a friction surface 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, this coating of the substrate is carried out at all the 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 is carried out at the level of surfaces adjoining a friction surface 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 coating of the substrate is carried out at all the surfaces of the mobile.
- the first material comprising phosphorus with a mass proportion of between 1% and 15% is chosen.
- the first material consisting solely of nickel and phosphorus is chosen.
- the first non-magnetic material is chosen with a mass proportion of phosphorus of between 10% and 15%.
- the first non-magnetic material is chosen.
- the second material is chosen comprising only pure nickel, or else only nickel and phosphorus.
- the second material is chosen with a phosphorus mass proportion of less than or equal to 15%.
- 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%.
- 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 mass proportion of phosphorus less than or equal to 1%.
- the second material comprising boron is chosen.
- the second material consisting solely of nickel and boron is chosen.
- the second material is applied galvanically.
- the second material is applied chemically.
- the coating is applied with a thickness of less than 10 micrometers.
- the coating is applied with a thickness of between 0.2 micrometer and 5.0 micrometer. More particularly still, the coating is applied with a thickness of between 0.2 micrometer and 2.0 micrometer.
- the coating is applied with a thickness of less than 0.2 micrometer, in particular in the vicinity of 0.1 micrometer.
- a heat treatment is applied to the assembly formed by the substrate and its coating, at a temperature of between 100° C. and 500° C., for 1 to 8 hours.
- this heat treatment is carried out after the coating operation.
- this heat treatment is carried out before the coating operation.
- the substrate is produced by a “LIGA” process (lithography-galvanization-forming, from the German “Rôntgenlithographie, Galvanoformung, Abformung”).
- a coating is carried out by galvanic and/or chemical means of all the surfaces of the substrate, with such a second material.
- this process is applied to the manufacture of an escape wheel set formed for example by an escape wheel or an anchor.
- the thickness of the second material which constitutes the peripheral layer of the mobile is limited at the level of the at least one surface adjoining a friction surface to less than 10 micrometers. Even more particularly, the thickness of the second material which constitutes the peripheral layer of the mobile at the level of the at least one surface adjoining a friction surface is limited to less than 5 micrometers.
- the thickness of the second material which constitutes the peripheral layer of the mobile at the level of at least one surface of the substrate is limited to less than 10 micrometers. Even more particularly, the thickness of the second material which constitutes the peripheral layer of the mobile at the level of the at least one surface of the substrate is limited to less than 5 micrometers.
- This process allows the production of a micromechanical component, in particular a horological mobile, and more particularly still an escapement mechanism mobile, the surface of which is optimized.
- the mobile thus manufactured 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)
- Micromachines (AREA)
- Lubricants (AREA)
- Chemically Coating (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP20196228.9A EP3968095B1 (fr) | 2020-09-15 | 2020-09-15 | Procédé de fabrication d'un composant de micromécanique, notamment d'un mobile d'horlogerie, avec surface de contact optimisee |
| PCT/EP2021/074027 WO2022058160A1 (fr) | 2020-09-15 | 2021-08-31 | Procede de fabrication d'un composant de micromecanique, notamment d'un mobile d'horlogerie, dont la surface est optimisee |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP4214581A1 true EP4214581A1 (fr) | 2023-07-26 |
| EP4214581B1 EP4214581B1 (fr) | 2025-12-24 |
Family
ID=72521411
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20196228.9A Active EP3968095B1 (fr) | 2020-09-15 | 2020-09-15 | Procédé de fabrication d'un composant de micromécanique, notamment d'un mobile d'horlogerie, avec surface de contact optimisee |
| EP21769741.6A Active EP4214581B1 (fr) | 2020-09-15 | 2021-08-31 | Procede de fabrication d'un composant de micromecanique, notamment d'un mobile d'horlogerie, dont la surface est optimisee |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20196228.9A Active EP3968095B1 (fr) | 2020-09-15 | 2020-09-15 | Procédé de fabrication d'un composant de micromécanique, notamment d'un mobile d'horlogerie, avec surface de contact optimisee |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20230288872A1 (fr) |
| EP (2) | EP3968095B1 (fr) |
| JP (1) | JP7529888B2 (fr) |
| KR (1) | KR102848470B1 (fr) |
| CN (1) | CN116075781B (fr) |
| WO (1) | WO2022058160A1 (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 |
| EP2082014B1 (fr) * | 2006-11-02 | 2018-02-14 | Rolex Sa | Montre |
| JP5389455B2 (ja) * | 2008-02-21 | 2014-01-15 | セイコーインスツル株式会社 | 摺動部品及び時計 |
| CN103765330B (zh) * | 2011-07-21 | 2019-01-29 | 斯沃奇集团研究和开发有限公司 | 功能性微机械组件 |
| 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 |
| EP3171230B1 (fr) * | 2015-11-19 | 2019-02-27 | Nivarox-FAR S.A. | Composant d'horlogerie a tribologie amelioree |
| EP3171229A1 (fr) * | 2015-11-19 | 2017-05-24 | Nivarox-FAR S.A. | Composant d' horlogerie |
| WO2017102661A1 (fr) * | 2015-12-18 | 2017-06-22 | Rolex Sa | Procede de fabrication d'un composant horloger |
| EP3273307B1 (fr) * | 2016-07-19 | 2025-04-30 | Nivarox-FAR S.A. | Pièce pour mouvement d'horlogerie |
| EP3273306B1 (fr) * | 2016-07-19 | 2025-08-27 | Nivarox-FAR S.A. | Pièce pour mouvement d'horlogerie |
| CH712718B1 (fr) * | 2016-07-19 | 2020-12-15 | Nivarox Sa | Axe de pivotement pour mouvement d'horlogerie. |
| CH712719B1 (fr) * | 2016-07-19 | 2020-12-15 | Nivarox Sa | Composant horloger pour mouvement d'horlogerie. |
| JP7006065B2 (ja) * | 2017-09-14 | 2022-01-24 | セイコーエプソン株式会社 | 時計用部品、時計用ムーブメントおよび時計 |
| EP3786720B1 (fr) * | 2019-08-27 | 2023-12-13 | Rolex Sa | Composant horloger destiné à recevoir un organe par chassage |
| JP2021081299A (ja) * | 2019-11-19 | 2021-05-27 | セイコーエプソン株式会社 | 時計用部品及び時計 |
-
2020
- 2020-09-15 EP EP20196228.9A patent/EP3968095B1/fr active Active
-
2021
- 2021-08-31 WO PCT/EP2021/074027 patent/WO2022058160A1/fr not_active Ceased
- 2021-08-31 JP JP2023503437A patent/JP7529888B2/ja active Active
- 2021-08-31 KR KR1020237006768A patent/KR102848470B1/ko active Active
- 2021-08-31 CN CN202180063007.6A patent/CN116075781B/zh active Active
- 2021-08-31 EP EP21769741.6A patent/EP4214581B1/fr active Active
- 2021-08-31 US US18/006,672 patent/US20230288872A1/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| US20230288872A1 (en) | 2023-09-14 |
| EP4214581B1 (fr) | 2025-12-24 |
| EP3968095B1 (fr) | 2026-02-18 |
| CN116075781B (zh) | 2025-04-11 |
| KR20230044271A (ko) | 2023-04-03 |
| JP2023534523A (ja) | 2023-08-09 |
| KR102848470B1 (ko) | 2025-08-20 |
| JP7529888B2 (ja) | 2024-08-06 |
| WO2022058160A1 (fr) | 2022-03-24 |
| EP3968095A1 (fr) | 2022-03-16 |
| CN116075781A (zh) | 2023-05-05 |
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