EP3680731B1 - Herstellungsverfahren von uhrkomponenten aus zerbrechlichem material - Google Patents

Herstellungsverfahren von uhrkomponenten aus zerbrechlichem material Download PDF

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Publication number
EP3680731B1
EP3680731B1 EP19150749.0A EP19150749A EP3680731B1 EP 3680731 B1 EP3680731 B1 EP 3680731B1 EP 19150749 A EP19150749 A EP 19150749A EP 3680731 B1 EP3680731 B1 EP 3680731B1
Authority
EP
European Patent Office
Prior art keywords
timepiece components
components
tool
fragile material
timepiece
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
EP19150749.0A
Other languages
English (en)
French (fr)
Other versions
EP3680731A1 (de
Inventor
Sylvain Jeanneret
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.)
Patek Philippe SA Geneve
Original Assignee
Patek Philippe SA Geneve
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 Patek Philippe SA Geneve filed Critical Patek Philippe SA Geneve
Priority to EP19150749.0A priority Critical patent/EP3680731B1/de
Publication of EP3680731A1 publication Critical patent/EP3680731A1/de
Application granted granted Critical
Publication of EP3680731B1 publication Critical patent/EP3680731B1/de
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Classifications

    • 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
    • G04D3/0002—Watchmakers' or watch-repairers' machines or tools for working materials for mechanical working other than with a lathe
    • G04D3/0043—Watchmakers' or watch-repairers' machines or tools for working materials for mechanical working other than with a lathe for components of the time-indicating mechanisms
    • G04D3/0046—Watchmakers' or watch-repairers' machines or tools for working materials for mechanical working other than with a lathe for components of the time-indicating mechanisms for hands
    • 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
    • G04B13/00—Gearwork
    • G04B13/02—Wheels; Pinions; Spindles; Pivots
    • G04B13/028—Wheels; Pinions; Spindles; Pivots wheels in which the teeth are conic, contrate, etc; also column wheels construction
    • 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
    • G04B19/00—Indicating the time by visual means
    • G04B19/04—Hands; Discs with a single mark or the like
    • G04B19/042—Construction and manufacture of the hands; arrangements for increasing reading accuracy
    • 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
    • G04D3/0002—Watchmakers' or watch-repairers' machines or tools for working materials for mechanical working other than with a lathe
    • G04D3/0015—Watchmakers' or watch-repairers' machines or tools for working materials for mechanical working other than with a lathe for components of the pawl construction, stop clicks, clutches
    • 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
    • G04D3/0002—Watchmakers' or watch-repairers' machines or tools for working materials for mechanical working other than with a lathe
    • G04D3/0017—Watchmakers' or watch-repairers' machines or tools for working materials for mechanical working other than with a lathe for components of gearworks
    • G04D3/002—Watchmakers' or watch-repairers' machines or tools for working materials for mechanical working other than with a lathe for components of gearworks for gear wheels or gears
    • 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
    • G04D3/0002—Watchmakers' or watch-repairers' machines or tools for working materials for mechanical working other than with a lathe
    • G04D3/0028—Watchmakers' or watch-repairers' machines or tools for working materials for mechanical working other than with a lathe for components of the escape mechanism
    • G04D3/0033—Watchmakers' or watch-repairers' machines or tools for working materials for mechanical working other than with a lathe for components of the escape mechanism for lever wheels
    • 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
    • G04D3/0002—Watchmakers' or watch-repairers' machines or tools for working materials for mechanical working other than with a lathe
    • G04D3/0043—Watchmakers' or watch-repairers' machines or tools for working materials for mechanical working other than with a lathe for components of the time-indicating mechanisms
    • G04D3/0048—Watchmakers' or watch-repairers' machines or tools for working materials for mechanical working other than with a lathe for components of the time-indicating mechanisms for dials

Definitions

  • the present invention relates to a process for manufacturing watch components made of fragile material.
  • brittle material is meant any material which, at ambient temperature (25° C.), does not have a plastic domain and is therefore not capable of deforming permanently. A brittle material breaks without prior plastic deformation.
  • fragile material mention may be made of glasses, silicon, graphite, carbon, quartz, sapphire and ceramics such as silicon nitride or silicon carbide.
  • the present invention aims to provide an industrial solution for producing horological components made of three-dimensional fragile material which overcomes the aforementioned drawbacks or at least attenuates them.
  • a method according to claim 1 particular embodiments being defined in the dependent claims.
  • the figure 1 schematically illustrates a process for manufacturing watch components, in particular for wristwatches or pocket watches, according to the invention.
  • a first step of the method consists in etching a silicon wafer 10, preferably by DRIE deep reactive ion etching, in order to form therein a batch of watch components 11 ( figure 1(a) ).
  • Silicon is monocrystalline or polycrystalline, preferably monocrystalline.
  • the components watchmakers 11 are, for example, indicator hands as illustrated in figure 2 .
  • Bridges of material 12 are left during etching between the timepiece components 11 and the rest of the silicon wafer 10 to prevent the timepiece components 11 from detaching.
  • the silicon wafer 10 with its timepiece components 11 is placed in an oven to be subjected to heat treatment, at a temperature typically between 500°C and 1300°C, preferably between 800°C and 1200°C. C, more preferably between 1000°C and 1200°C. At these temperatures, silicon becomes ductile and can therefore deform permanently.
  • the silicon wafer 10 rests by its underside on a hollow support 13 ( figure 1(b) ).
  • the silicon wafer 10 can be fixed to the support 13 or simply positioned on the latter.
  • a tool 14 is applied to the upper face of the silicon wafer 10 in the form of a wafer bearing projections 15 ( figure 1(c) ).
  • the tool 14 is positioned so that the projections 15 are placed facing respective areas 16 of the watch components 11 to be deformed, these areas 16 to be deformed being themselves facing recesses 17 of the support 13 in order to be able to deform freely.
  • the projections 15 put the zones 16 under stress so as to deform them simultaneously and plastically ( figure 1(d) ).
  • Each of the timepiece components 11 excluding its zone 16 bears against the support 13 to prevent its detachment from the wafer 10 during the application of the tool 14.
  • the projections 15 can be of any suitable shape.
  • the support 13 and the tool 14 are each made of a material which resists the temperatures of the heat treatment, for example quartz, fused silica, silicon carbide, a polyimide-based plastic such as Vespel (registered trademark) , a metal, an alloy or a ceramic. These materials also have the advantage of not sticking to the silicon of the wafer 10 during the heat treatment.
  • the silicon wafer 10 is extracted from the oven and cooled ( Figure 1(e) ), then the deformed watch components 11 are detached from the wafer 10 by breaking or eliminating the bridges of material 12.
  • timepiece components 11 are deformed by the tool 14 during the heat treatment.
  • several areas 16 of the component can be deformed.
  • the process according to the invention makes it possible to obtain needles whose end is curved, as illustrated in picture 3 , to follow the curved profile of a dial or to improve reading accuracy for example for a second hand which is remote from the dial by its position above the other hands.
  • Other types of horological components than hands can be manufactured by the method according to the invention, for example dials, springs, in particular rocker or lever springs, wheels, toothed or not, such as wheels of escapement or gear wheels, anchors, rockers, levers, pawls, saltires, etc.
  • the dials (cf. figure 4 ) can be curved, for example to be associated with needles of the type illustrated in picture 3 .
  • the escape wheels (cf. figure 6 ) can be curved.
  • the gear wheels (cf. figure 7 ) may include curved lugs 18.
  • the deformation of the components may have a functional purpose, for example allowing the component to cooperate with a partner component located in another plane or reducing the friction surfaces between two partner components. It can also, in addition or as an alternative, have an aesthetic purpose.
  • various additional treatments can be implemented to improve the characteristics of said components, for example their mechanical resistance, their properties tribological, their aesthetic aspect, etc. It is thus possible in particular to provide for the formation of an oxide layer on the components.
  • the present invention can be applied to other fragile materials than silicon, in particular to other monocrystalline materials or to materials such as glasses, quartz, sapphire or ceramics.
  • the present invention offers an industrial solution for producing horological components in three-dimensional fragile material having shapes that are difficult or even impossible to obtain with known methods.

Claims (10)

  1. Verfahren zur Herstellung von Uhrenkomponenten aus zerbrechlichem Material, das die folgenden Schritte umfasst:
    a) Fertigen von Uhrenkomponenten (11) in einer Platte (10) aus zerbrechlichem Material, wobei die Uhrenkomponenten (11) durch Materialbrücken (12) an der Platte (10) befestigt bleiben,
    b) Unterziehen der Uhrenkomponenten (11) einer Wärmebehandlung und, während dieser Wärmebehandlung, Anwenden einer Beanspruchung auf mindestens eine Zone (16) von mindestens einer der Uhrenkomponenten (11) mittels eines Werkzeugs (14), um sie auf dauerhafte Weise zu verformen, wobei die mindestens eine der Uhrenkomponenten (11) mit Ausnahme der mindestens einen Zone (16) während der Anwendung der Beanspruchung gegen eine Stütze (13) in Auflage ist,
    c) Lösen der Uhrenkomponenten von der Platte (10),
    dadurch gekennzeichnet, dass der Schritt c) nach dem Schritt b) stattfindet.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass der Schritt a) einen Schritt des reaktiven Ionentiefenätzens umfasst.
  3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Wärmebehandlung von Schritt b) bei einer Temperatur von zwischen 500 °C und 1300 °C durchgeführt wird.
  4. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass im Schritt b) die Beanspruchung mittels des Werkzeugs (14) gleichzeitig auf die Uhrenkomponenten (11) oder mehrere der Uhrenkomponenten (11) angewandt wird, um sie auf dauerhafte Weise zu verformen.
  5. Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass im Schritt b) die Beanspruchung durch mindestens einen Vorsprung (15) angewandt wird, den das Werkzeug (14) umfasst.
  6. Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass das Werkzeug (14) aus Quarz, geschmolzenem Siliziumdioxid, Siliziumcarbid, Kunststoff auf Polyimidbasis, Metall, Legierung oder Keramik besteht.
  7. Verfahren nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die Stütze (13) aus Quarz, geschmolzenem Siliziumdioxid, Siliziumcarbid, Kunststoff auf Polyimidbasis, Metall, Legierung oder Keramik besteht.
  8. Verfahren nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass das zerbrechliche Material Silizium, Glas, Quarz, Saphir oder eine Keramik ist.
  9. Verfahren nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass das zerbrechliche Material ein monokristallines Material ist.
  10. Verfahren nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass die Uhrenkomponenten (11) Anzeigezeiger, Zifferblätter, Federn, Räder, Anker, Wippen, Hebel, Sperrkegel oder Hebelfedern sind.
EP19150749.0A 2019-01-08 2019-01-08 Herstellungsverfahren von uhrkomponenten aus zerbrechlichem material Active EP3680731B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP19150749.0A EP3680731B1 (de) 2019-01-08 2019-01-08 Herstellungsverfahren von uhrkomponenten aus zerbrechlichem material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19150749.0A EP3680731B1 (de) 2019-01-08 2019-01-08 Herstellungsverfahren von uhrkomponenten aus zerbrechlichem material

Publications (2)

Publication Number Publication Date
EP3680731A1 EP3680731A1 (de) 2020-07-15
EP3680731B1 true EP3680731B1 (de) 2022-06-08

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Application Number Title Priority Date Filing Date
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Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH696475A5 (fr) * 2005-05-12 2007-06-29 Eta Sa Mft Horlogere Suisse Organe d'affichage analogique en matériau cristallin, pièce d'horlogerie pourvue d'un tel organe d'affichage et procédé pour sa fabrication.
CH699109A1 (fr) * 2008-07-10 2010-01-15 Swatch Group Res & Dev Ltd Procédé de fabrication d'une pièce micromécanique.
JP2010217054A (ja) * 2009-03-17 2010-09-30 Seiko Epson Corp 時計用文字板の製造方法、時計用文字板および時計
CH704391B1 (fr) * 2009-12-09 2016-01-29 Rolex Sa Procédé de fabrication d'un ressort pour pièce d'horlogerie.
HK1193537A2 (en) * 2013-07-29 2014-09-19 Master Dynamic Ltd Silicon overcoil balance spring
CH709729A2 (fr) * 2014-06-03 2015-12-15 Swatch Group Res & Dev Ltd Pièce d'habillage à base de verre photostructurable.

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Publication number Publication date
EP3680731A1 (de) 2020-07-15

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