EP3680731A1 - Herstellungsverfahren von uhrkomponenten aus zerbrechlichem material - Google Patents

Herstellungsverfahren von uhrkomponenten aus zerbrechlichem material Download PDF

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Publication number
EP3680731A1
EP3680731A1 EP19150749.0A EP19150749A EP3680731A1 EP 3680731 A1 EP3680731 A1 EP 3680731A1 EP 19150749 A EP19150749 A EP 19150749A EP 3680731 A1 EP3680731 A1 EP 3680731A1
Authority
EP
European Patent Office
Prior art keywords
watch components
components
fragile material
watch
tool
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
Application number
EP19150749.0A
Other languages
English (en)
French (fr)
Other versions
EP3680731B1 (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
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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 method of manufacturing watch components made of fragile material.
  • fragile 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 fragile 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 remedy these drawbacks or at least to mitigate them and proposes for this purpose 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 in the process consists in etching a silicon wafer 10, preferably by deep reactive ion etching DRIE, in order to form therein a batch of horological components 11 ( figure 1 (a) ).
  • the silicon is monocrystalline or polycrystalline, preferably monocrystalline.
  • the watch components 11 are for example indicator hands as illustrated in the figure 2 .
  • Bridges of material 12 are left during the etching between the watch components 11 and the rest of the silicon wafer 10 to prevent the watch components 11 from coming loose.
  • the silicon wafer 10 with its watch components 11 is placed in an oven to be subjected to a heat treatment, at a temperature typically between 500 ° C and 1300 ° C, preferably between 800 ° C and 1200 ° C, more preferably between 1000 ° C and 1200 ° C. At these temperatures, the silicon becomes ductile and can therefore be permanently deformed.
  • 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 thereon.
  • a tool 14 is applied to the upper face of the silicon wafer 10 in the form of a wafer carrying projections 15 ( figure 1 (c) ).
  • the tool 14 is positioned so that the projections 15 are placed facing respective zones 16 of the watch components 11 to be deformed, these zones 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 watch components 11 excluding its zone 16 is in abutment against the support 13 to prevent its detachment from the plate 10 during the application of the tool 14.
  • the projections 15 may 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 plastic based on polyimide 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 horological components 11 are detached from the plate 10 by breaking or eliminating the material bridges 12.
  • the method according to the invention makes it possible to obtain needles whose ends are curved, as illustrated in FIG. figure 3 , to follow the curved profile of a dial or to improve the reading accuracy for, for example, a second hand which is distant from the dial by its position above the other hands.
  • Other types of horological components than hands can be produced by the process according to the invention, for example dials, springs, in particular rocking or lever springs, wheels, toothed or not, such as exhaust or gear wheels, anchors, flip-flops, levers, pawls, jumpers, etc.
  • the dials (cf. figure 4 ) can be curved, for example to be combined with needles of the type illustrated in the figure 3 .
  • the escape wheels (cf. figure 6 ) can be curved.
  • the gear wheels (cf. figure 7 ) may include curved tabs 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 complementary treatments can be implemented to improve the characteristics of said components, for example their mechanical strength, their tribological properties, their aesthetic appearance, 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 watch components in fragile three-dimensional material. having shapes which it is difficult or even impossible to obtain with known methods.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Micromachines (AREA)
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 true EP3680731A1 (de) 2020-07-15
EP3680731B1 EP3680731B1 (de) 2022-06-08

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ID=65010607

Family Applications (1)

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

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EP (1) EP3680731B1 (de)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1722281A1 (de) * 2005-05-12 2006-11-15 ETA SA Manufacture Horlogère Suisse Analoger Anzeiger aus kristallenem Material, Uhr mit solchem Anzeiger, und Herstellungsverfahren dafür
EP2145856A1 (de) * 2008-07-10 2010-01-20 The Swatch Group Research and Development Ltd. Verfahren zur Herstellung eines mikromechanischen Bauteils
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
WO2011069273A1 (fr) * 2009-12-09 2011-06-16 Rolex S.A. Procédé de fabrication d'un ressort pour pièce d'horlogerie
EP2833221A2 (de) * 2013-07-29 2015-02-04 Master Dynamic Limited Silicium-Ausgleichsspiralfeder
EP2952978A1 (de) * 2014-06-03 2015-12-09 The Swatch Group Research and Development Ltd. Verkleidungselement aus fotostrukturierbarem glas

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1722281A1 (de) * 2005-05-12 2006-11-15 ETA SA Manufacture Horlogère Suisse Analoger Anzeiger aus kristallenem Material, Uhr mit solchem Anzeiger, und Herstellungsverfahren dafür
EP2145856A1 (de) * 2008-07-10 2010-01-20 The Swatch Group Research and Development Ltd. Verfahren zur Herstellung eines mikromechanischen Bauteils
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
WO2011069273A1 (fr) * 2009-12-09 2011-06-16 Rolex S.A. Procédé de fabrication d'un ressort pour pièce d'horlogerie
EP2833221A2 (de) * 2013-07-29 2015-02-04 Master Dynamic Limited Silicium-Ausgleichsspiralfeder
EP2952978A1 (de) * 2014-06-03 2015-12-09 The Swatch Group Research and Development Ltd. Verkleidungselement aus fotostrukturierbarem glas

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EP3680731B1 (de) 2022-06-08

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