EP4092489A1 - Verfahren zum umformen einer triebfeder aus metallischen glas - Google Patents

Verfahren zum umformen einer triebfeder aus metallischen glas Download PDF

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Publication number
EP4092489A1
EP4092489A1 EP22170104.8A EP22170104A EP4092489A1 EP 4092489 A1 EP4092489 A1 EP 4092489A1 EP 22170104 A EP22170104 A EP 22170104A EP 4092489 A1 EP4092489 A1 EP 4092489A1
Authority
EP
European Patent Office
Prior art keywords
ribbon
spring
curvatures
heating
shaped
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.)
Withdrawn
Application number
EP22170104.8A
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English (en)
French (fr)
Inventor
Dominique Gritti
Thomas Gyger
Vincent von Niederhäusern
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.)
Rolex SA
Original Assignee
Rolex SA
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=41110579&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP4092489(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from EP08405192A external-priority patent/EP2154581A1/de
Application filed by Rolex SA filed Critical Rolex SA
Publication of EP4092489A1 publication Critical patent/EP4092489A1/de
Withdrawn legal-status Critical Current

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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
    • G04B1/00—Driving mechanisms
    • G04B1/10—Driving mechanisms with mainspring
    • G04B1/14—Mainsprings; Bridles therefor
    • G04B1/145—Composition and manufacture of the springs

Definitions

  • the present invention relates to a method for shaping a barrel spring for a mechanism driven by a mainspring, in particular for a timepiece, formed from a metallic glass material.
  • the mechanical properties of the alloy and the final shape are the result of the combination of these two steps. A single heat treatment would not achieve the mechanical properties desired for traditional alloys.
  • the fixing of crystalline metal alloys involves a relatively long treatment time (several hours) at a temperature high enough to induce the desired modification of the crystalline structure.
  • Nivaflex ® which are obtained by a series of heat treatments at different stages of their manufacturing process. Therefore, and contrary to the Nivaflex ® alloy, subsequent hardening by heat treatment is not necessary.
  • the object of the present invention is to remedy, at least in part, the aforementioned drawbacks.
  • the subject of the present invention is a method for shaping the barrel spring according to claim 1.
  • the strips intended to form the barrel springs are produced by the wheel quenching technique (or Planar Flow Casting) which is a technique for producing metal strips by rapid cooling.
  • a jet of molten metal is propelled onto a cold wheel which spins at high speed.
  • the speed of the wheel, the width of the injection slot, the injection pressure are all parameters which will define the width and the thickness of the tape produced.
  • Other ribbon-making techniques may also be used, such as the Twin Roll Casting.
  • the alloy used is Ni 53 Nb 20 Zr 8 Ti 10 Co 6 Cu 3 in this example. From 10 to 20g of alloy are placed in a distribution nozzle heated between 1050 and 1150°C. The slit width of the nozzle is between 0.2 and 0.8mm. The distance between the nozzle and the wheel is between 0.1 and 0.3mm. The wheel on which the molten alloy is deposited is a copper alloy wheel and driven at a speed of 5 to 20m/s. The pressure exerted to force the molten alloy out through the nozzle is between 10 and 50 kPa.
  • the barrel spring releases its energy when it passes from the armed state to the disarmed state.
  • the goal is to calculate the shape that the spring must have in its free state so that each section is subjected to the maximum bending moment in its armed state.
  • the figures 1 to 3 below respectively describe the three mainspring configurations, namely armed, disarmed and free.
  • the spring in its charged state (see figure 1 ) is considered to be a spiral with the turns tight against each other.
  • the metallic glass ribbon is obtained by rapid solidification of the liquid metal on a copper or alloy wheel with high thermal conductivity rotating at high speed.
  • a minimum critical cooling rate is required to vitrify liquid metal. If the cooling is too slow, the metal solidifies by crystallization and loses its mechanical properties. It is important, for a given thickness, to guarantee the maximum cooling rate. The higher this will be, the less the atoms will have time to relax and the greater the concentration of free volume will be. The ductility of the ribbon is then improved.
  • the Planar Flow Casting step is therefore decisive for the mechanical and thermodynamic properties of the tape.
  • the viscosity decreases sharply with temperature, i.e. approximately one order of magnitude per 10K rise.
  • the viscosity at Tg is generally equal to 10 12 Pa.s, independently of the alloy considered. It is then possible to model the viscous body, in this case the ribbon, to give it its desired shape, then cool it to permanently fix the shape.
  • thermal activation will allow the diffusion of free volumes and atoms within the material.
  • the atoms will locally form denser domains, close to a crystalline structure at the expense of the free volumes, which will be annihilated. This phenomenon is called relaxation.
  • the decrease in free volume is accompanied by an increase in Young's modulus and a decrease in subsequent ductility.
  • the relaxation phenomenon may resemble annealing.
  • the thermal agitation the relaxation is accelerated and causes a drastic embrittlement of the glass by annihilation of the free volume. If the treatment time is too long, the amorphous material will crystallize and thus lose its exceptional properties.
  • Hot forming is therefore a balance between sufficient relaxation to retain the desired shape and as little reduction in ductility as possible.
  • the ribbons produced by the Planar Flow Casting (PFC) technique have a width of several millimeters and a thickness of between 40 and 150 ⁇ m. Strips have been machined, using the wire EDM technique, to the typical width and length of a mainspring. The flanks were ground, after which the spring was shaped, based on the theoretical shape as calculated previously.
  • PFC Planar Flow Casting
  • a laying of the type generally used is used, on which the spring is wound to give it its free shape, determined by the theoretical shape as calculated above, taking into account a variation between the shape imposed by the laying and the free shape actually obtained.
  • the curvatures being defined as the inverse of the radius of curvature
  • the laying curvatures must therefore be increased accordingly so that the free shape obtained corresponds to the theoretical shape.
  • the ratio between the curvatures of the shaped ribbon before the relaxation heating and the curvatures of the theoretical free form depends on the heating parameters, the alloy and its state of initial relaxation, and is between 100% and 140%, typically 130% under the conditions used below.
  • the spring in its setting was then introduced into an oven heated to around Tg (590° C.) for a period of 3 to 5 minutes, depending on the setting used.
  • heating modes can be used, such as heating by Joule effect or a jet of hot inert gas for example.
  • a sliding flange for a self-winding watch spring in Nivaflex ® alloy was riveted to its outer end, to enable winding and unwinding tests to be carried out.
  • the sliding flange is necessary to ensure the function of such a spring, however its method of assembly to the blade as well as the material of the flange may vary.
  • the figure 4 shows the variation in torque as a function of the number of turns obtained with the spring calculated and shaped according to the method described in this document.
  • This winding-unwinding curve is entirely characteristic of the behavior of a mainspring.
  • the torque, the number of turns of development and the overall efficiency are fully satisfactory given the dimensions of the ribbon.

Landscapes

  • Engineering & Computer Science (AREA)
  • Metallurgy (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Springs (AREA)
  • Electromechanical Clocks (AREA)
EP22170104.8A 2008-06-10 2009-06-09 Verfahren zum umformen einer triebfeder aus metallischen glas Withdrawn EP4092489A1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
EP08405153 2008-06-10
EP08405192A EP2154581A1 (de) 2008-08-04 2008-08-04 Schließzylinderfeder und Verfahren zur ihrer Formgebung
EP09771888.6A EP2286308B1 (de) 2008-06-10 2009-06-09 Feder von amorphem metall für federhaus und verfahren zur ihrer formgebung
PCT/CH2009/000191 WO2010000081A1 (fr) 2008-06-10 2009-06-09 Procede pour la mise en forme d'un ressort de barillet en verre metallique

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP09771888.6A Division EP2286308B1 (de) 2008-06-10 2009-06-09 Feder von amorphem metall für federhaus und verfahren zur ihrer formgebung

Publications (1)

Publication Number Publication Date
EP4092489A1 true EP4092489A1 (de) 2022-11-23

Family

ID=41110579

Family Applications (3)

Application Number Title Priority Date Filing Date
EP09405089.5A Revoked EP2133756B1 (de) 2008-06-10 2009-05-27 Zugfeder für Federhaus
EP22170104.8A Withdrawn EP4092489A1 (de) 2008-06-10 2009-06-09 Verfahren zum umformen einer triebfeder aus metallischen glas
EP09771888.6A Active EP2286308B1 (de) 2008-06-10 2009-06-09 Feder von amorphem metall für federhaus und verfahren zur ihrer formgebung

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP09405089.5A Revoked EP2133756B1 (de) 2008-06-10 2009-05-27 Zugfeder für Federhaus

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP09771888.6A Active EP2286308B1 (de) 2008-06-10 2009-06-09 Feder von amorphem metall für federhaus und verfahren zur ihrer formgebung

Country Status (6)

Country Link
US (2) US8348496B2 (de)
EP (3) EP2133756B1 (de)
JP (2) JP5656369B2 (de)
CN (2) CN101604141B (de)
CH (1) CH698962B1 (de)
WO (1) WO2010000081A1 (de)

Families Citing this family (28)

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CH698962B1 (fr) * 2008-06-10 2014-10-31 Rolex Sa Ressort de barillet et procédé pour sa mise en forme.
EP2510405B1 (de) * 2009-12-09 2016-03-30 Rolex S.A. Verfahren zur formung einer feder für eine uhr
US20110156328A1 (en) * 2009-12-31 2011-06-30 Nicolio Curtis J Integral retainer to retain a spring
GB201001897D0 (en) * 2010-02-05 2010-03-24 Levingston Gideon Non magnetic mateial additives and processes for controling the thermoelastic modulus and spring stiffness within springs for precision instruments
EP2390732A1 (de) 2010-05-27 2011-11-30 Association Suisse pour la Recherche Horlogère Zugfeder für Federhaus
CN103124935B (zh) * 2010-06-22 2015-05-13 斯沃奇集团研究和开发有限公司 钟表抗震系统
CN102339008A (zh) * 2010-07-15 2012-02-01 慈溪市九菱电器有限公司 一种定时器s形发条
EP2596141B1 (de) 2010-07-21 2014-11-12 Rolex Sa Amorphe metallische legierung
JP6346441B2 (ja) 2010-07-21 2018-06-20 ロレックス・ソシエテ・アノニムＲｏｌｅｘ Ｓａ アモルファス金属合金を含む時計部品
US9298162B2 (en) * 2010-10-01 2016-03-29 Rolex Sa Timepiece barrel with thin disks
CH704236B1 (fr) 2010-12-17 2015-09-30 Manuf Et Fabrique De Montres Et Chronomètres Ulysse Nardin Le Locle Sa Procédé de réalisation d'un timbre de sonnerie.
DE102011001783B4 (de) 2011-04-04 2022-11-24 Vacuumschmelze Gmbh & Co. Kg Feder für ein mechanisches Uhrwerk, mechanisches Uhrwerk, Uhr mit einem mechanischen Uhrwerk und Verfahren zur Herstellung einer Feder
DE102011001784B4 (de) 2011-04-04 2018-03-22 Vacuumschmelze Gmbh & Co. Kg Verfahren zur Herstellung einer Feder für ein mechanisches Uhrwerk und Feder für ein mechanisches Uhrwerk
EP2590325A1 (de) * 2011-11-04 2013-05-08 The Swatch Group Research and Development Ltd. Thermokompensierter Resonator aus Keramik
JP6109921B2 (ja) * 2012-03-16 2017-04-05 イェール ユニバーシティーＹａｌｅ Ｕｎｉｖｅｒｓｉｔｙ 金属ガラスから作られる複雑な物品の製造のための多段階加工方法
US9448533B2 (en) 2012-04-04 2016-09-20 Rolex Sa Barrel shaft for a clock movement, barrel spring and barrel including such a spring and/or such a shaft
EP2703911B1 (de) 2012-09-03 2018-04-11 Blancpain SA. Regulierorgan für kleinuhr
EP2706415A3 (de) * 2012-09-05 2017-06-14 Seiko Epson Corporation Verfahren zur Herstellung einer Uhrfeder, Vorrichtung zur Herstellung einer Uhrfeder, Uhrfeder und Uhr
CH708231B1 (fr) * 2013-06-27 2017-03-15 Nivarox Far Sa Ressort d'horlogerie en acier inoxydable austénitique.
CH708660A1 (fr) * 2013-10-04 2015-04-15 Cartier Création Studio Sa Ressort moteur pour barillet moteur minimisant l'usure du tambour.
EP2924514B1 (de) 2014-03-24 2017-09-13 Nivarox-FAR S.A. Uhrfeder aus austenitischem Edelstahl
US10315241B2 (en) 2014-07-01 2019-06-11 United Technologies Corporation Cast components and manufacture and use methods
DE102015002430A1 (de) 2015-02-26 2016-09-01 Gernot Hausch CoNiCrMo-Legierung für Aufzugsfedern in einem mechanischen Uhrwerk
US10317842B2 (en) 2016-04-25 2019-06-11 Seiko Epson Corporation Timepiece mainspring, timepiece drive device, timepiece movement, timepiece, and manufacturing method of timepiece mainspring
EP3273305B1 (de) * 2016-07-19 2023-07-19 Nivarox-FAR S.A. Bauteil für uhrwerk
EP3557333B1 (de) 2018-04-16 2020-11-04 Patek Philippe SA Genève Herstellungsverfahren einer zugfeder für eine uhr
EP3575885B1 (de) * 2018-06-01 2022-09-21 Nivarox-FAR S.A. Federhaus für uhren
EP3882710A1 (de) 2020-03-19 2021-09-22 Patek Philippe SA Genève Verfahren zur herstellung einer uhrenkomponente auf siliziumbasis

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US3187416A (en) * 1961-02-14 1965-06-08 Tuetey Paul Method for manufacturing spiral springs, particularly for watchmaking
DE3136303A1 (de) * 1981-09-12 1983-04-14 Vacuumschmelze Gmbh, 6450 Hanau Vorrichtung fuer die herstellung von metallband aus einer schmelze
EP0942337A1 (de) 1997-08-28 1999-09-15 Seiko Epson Corporation Feder, zugfeder, spiralfeder, diese verwendenden antriebsmechanismus und uhr
US20070133355A1 (en) * 2003-11-07 2007-06-14 Seik Epson Corporation Timepiece and spring thereof

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EP2154581A1 (de) 2008-08-04 2010-02-17 Rolex Sa Schließzylinderfeder und Verfahren zur ihrer Formgebung
CH698962B1 (fr) * 2008-06-10 2014-10-31 Rolex Sa Ressort de barillet et procédé pour sa mise en forme.
EP2510405B1 (de) 2009-12-09 2016-03-30 Rolex S.A. Verfahren zur formung einer feder für eine uhr
JP6346441B2 (ja) 2010-07-21 2018-06-20 ロレックス・ソシエテ・アノニムＲｏｌｅｘ Ｓａ アモルファス金属合金を含む時計部品

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3187416A (en) * 1961-02-14 1965-06-08 Tuetey Paul Method for manufacturing spiral springs, particularly for watchmaking
DE3136303A1 (de) * 1981-09-12 1983-04-14 Vacuumschmelze Gmbh, 6450 Hanau Vorrichtung fuer die herstellung von metallband aus einer schmelze
EP0942337A1 (de) 1997-08-28 1999-09-15 Seiko Epson Corporation Feder, zugfeder, spiralfeder, diese verwendenden antriebsmechanismus und uhr
US20070133355A1 (en) * 2003-11-07 2007-06-14 Seik Epson Corporation Timepiece and spring thereof

Also Published As

Publication number Publication date
CH698962B1 (fr) 2014-10-31
EP2133756B1 (de) 2016-07-20
EP2133756A2 (de) 2009-12-16
US20090303842A1 (en) 2009-12-10
US8348496B2 (en) 2013-01-08
WO2010000081A1 (fr) 2010-01-07
EP2286308A1 (de) 2011-02-23
CN101604141A (zh) 2009-12-16
US8720246B2 (en) 2014-05-13
CH698962A2 (fr) 2009-12-15
JP5656369B2 (ja) 2015-01-21
CN101604141B (zh) 2012-06-27
CN102057336A (zh) 2011-05-11
US20110072873A1 (en) 2011-03-31
JP2011523066A (ja) 2011-08-04
EP2286308B1 (de) 2022-05-04
JP5518852B2 (ja) 2014-06-11
CN102057336B (zh) 2013-07-03
EP2133756A3 (de) 2011-04-13
JP2009300439A (ja) 2009-12-24

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