EP2154581A1 - Schließzylinderfeder und Verfahren zur ihrer Formgebung - Google Patents

Schließzylinderfeder und Verfahren zur ihrer Formgebung Download PDF

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Publication number
EP2154581A1
EP2154581A1 EP08405192A EP08405192A EP2154581A1 EP 2154581 A1 EP2154581 A1 EP 2154581A1 EP 08405192 A EP08405192 A EP 08405192A EP 08405192 A EP08405192 A EP 08405192A EP 2154581 A1 EP2154581 A1 EP 2154581A1
Authority
EP
European Patent Office
Prior art keywords
spring
barrel
mainspring
blade
shape
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Withdrawn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
EP08405192A
Other languages
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
Application filed by Rolex SA filed Critical Rolex SA
Priority to EP08405192A priority Critical patent/EP2154581A1/de
Priority to CH00809/09A priority patent/CH698962B1/fr
Priority to EP09405089.5A priority patent/EP2133756B1/de
Priority to US12/479,947 priority patent/US8348496B2/en
Priority to JP2009136880A priority patent/JP5656369B2/ja
Priority to CN2009101595422A priority patent/CN101604141B/zh
Priority to JP2011512804A priority patent/JP5518852B2/ja
Priority to US12/996,542 priority patent/US8720246B2/en
Priority to EP22170104.8A priority patent/EP4092489A1/de
Priority to PCT/CH2009/000191 priority patent/WO2010000081A1/fr
Priority to EP09771888.6A priority patent/EP2286308B1/de
Priority to CN2009801217412A priority patent/CN102057336B/zh
Publication of EP2154581A1 publication Critical patent/EP2154581A1/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Withdrawn legal-status Critical Current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
    • 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
    • G04D3/0005—Watchmakers' or watch-repairers' machines or tools for working materials for mechanical working other than with a lathe for parts of driving means
    • G04D3/0007—Watchmakers' or watch-repairers' machines or tools for working materials for mechanical working other than with a lathe for parts of driving means for springs

Definitions

  • the present invention relates to a barrel spring for a mechanism driven by a motor spring, particularly for a timepiece, formed of a metal glass material, and to a method for shaping the barrel spring. .
  • 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 desired mechanical properties 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.
  • the mechanical properties of the material are intrinsically linked to its amorphous structure and are obtained immediately after solidification, unlike the mechanical properties of the traditional Nivaflex ® alloy springs, which are obtained by a series of heat treatments at different stages of the process. their manufacturing process. Therefore, and unlike to the Nivaflex ® alloy, subsequent hardening by heat treatment is not necessary.
  • the object of the present invention is to overcome, at least in part, the aforementioned drawbacks.
  • the present invention firstly relates to a barrel spring for a mechanism driven by a motor spring according to claim 1. It then relates to a method for shaping the barrel spring.
  • the ribbons intended to form the barrel springs are made by the technique of quenching on a wheel (or Planar Flow Casting) which is a technique for producing metal ribbons by rapid cooling.
  • a jet of molten metal is propelled on a cold wheel that rotates at high speed.
  • the speed of the wheel, the width of the injection slot, the injection pressure are all parameters that will define the width and thickness of the ribbon produced.
  • Other techniques for producing ribbons can also be used, such as 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 20 g of alloy are placed in a dispensing 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 bring the molten alloy out through the nozzle is between 10 and 50kPa.
  • the barrel spring releases its energy as it moves 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 describe respectively the three configurations of the barrel spring namely armed, disarmed and free.
  • the spring in its armed state (see figure 1 ) is considered an Archimedean spiral with the turns tight against each other.
  • the metallic glass ribbon is obtained by rapid solidification of the liquid metal on a copper wheel or alloy with high thermal conductivity rotating at high speed.
  • a minimum critical cooling rate is required to vitrify the 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 it is, the less the atoms will have time to relax and the higher the concentration of free volume will be important. The ductility of the band is then improved.
  • the plastic deformation of the metal glasses below about 0.7 x the glass transition temperature Tg [K], is heterogeneous through the initiation and then the propagation of slip bands.
  • the free volumes act as sites of germination of the sliding bands and the more their number is high, the less the deformation is localized and the more the deformation before rupture is important.
  • Planar Flow Casting stage is therefore crucial for the mechanical and thermodynamic properties of the ribbon.
  • the viscosity decreases sharply with temperature, about an order of magnitude by 10K elevation.
  • 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 band, to give it its desired shape, then cool it to freeze the shape permanently.
  • 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 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 the subsequent ductility.
  • the relaxation phenomenon can be likened to annealing.
  • thermal agitation the diffusion of atoms is facilitated: 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 ductility as possible.
  • the strips produced by the Planar Flow Casting (PFC) technique have a width of several millimeters and a thickness of between 40 and 150 ⁇ m.
  • the ribbons were machined by wire EDM to the typical width and length of a mainspring. A sidewall grinding was performed, after which the spring was shaped from the theoretical form as previously calculated.
  • heating modes such as Joule heating or a hot inert gas jet, for example.
  • the figure 4 shows the torque variation as a function of the number of revolutions obtained with the spring calculated and shaped according to the method described in this document.
  • This armor-disarming curve is quite 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 blade.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Metallurgy (AREA)
  • Springs (AREA)
EP08405192A 2008-06-10 2008-08-04 Schließzylinderfeder und Verfahren zur ihrer Formgebung Withdrawn EP2154581A1 (de)

Priority Applications (12)

Application Number Priority Date Filing Date Title
EP08405192A EP2154581A1 (de) 2008-08-04 2008-08-04 Schließzylinderfeder und Verfahren zur ihrer Formgebung
CH00809/09A CH698962B1 (fr) 2008-06-10 2009-05-26 Ressort de barillet et procédé pour sa mise en forme.
EP09405089.5A EP2133756B1 (de) 2008-06-10 2009-05-27 Zugfeder für Federhaus
US12/479,947 US8348496B2 (en) 2008-06-10 2009-06-08 Mainspring
JP2009136880A JP5656369B2 (ja) 2008-06-10 2009-06-08 主ぜんまい
CN2009101595422A CN101604141B (zh) 2008-06-10 2009-06-09 主弹簧
JP2011512804A JP5518852B2 (ja) 2008-06-10 2009-06-09 金属ガラス製主ぜんまいの成形方法
US12/996,542 US8720246B2 (en) 2008-06-10 2009-06-09 Method for shaping a barrel spring made of metallic glass
EP22170104.8A EP4092489A1 (de) 2008-06-10 2009-06-09 Verfahren zum umformen einer triebfeder aus metallischen glas
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
EP09771888.6A EP2286308B1 (de) 2008-06-10 2009-06-09 Feder von amorphem metall für federhaus und verfahren zur ihrer formgebung
CN2009801217412A CN102057336B (zh) 2008-06-10 2009-06-09 用以成形由金属玻璃制成的发条盒发条的方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08405192A EP2154581A1 (de) 2008-08-04 2008-08-04 Schließzylinderfeder und Verfahren zur ihrer Formgebung

Publications (1)

Publication Number Publication Date
EP2154581A1 true EP2154581A1 (de) 2010-02-17

Family

ID=40410068

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08405192A Withdrawn EP2154581A1 (de) 2008-06-10 2008-08-04 Schließzylinderfeder und Verfahren zur ihrer Formgebung

Country Status (1)

Country Link
EP (1) EP2154581A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2133756A3 (de) * 2008-06-10 2011-04-13 Rolex Sa Zugfeder für Federhaus
EP2703911A1 (de) * 2012-09-03 2014-03-05 Blancpain SA. Regulierorgan für Uhrwerk

Citations (3)

* 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

Patent Citations (3)

* 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

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2133756A3 (de) * 2008-06-10 2011-04-13 Rolex Sa Zugfeder für Federhaus
EP2133756B1 (de) 2008-06-10 2016-07-20 Rolex Sa Zugfeder für Federhaus
EP2703911A1 (de) * 2012-09-03 2014-03-05 Blancpain SA. Regulierorgan für Uhrwerk
WO2014033309A3 (fr) * 2012-09-03 2014-04-24 Blancpain Sa Organe régulateur d'horlogerie
US9201399B2 (en) 2012-09-03 2015-12-01 Blancpain S.A. Timepiece regulating member
RU2625733C2 (ru) * 2012-09-03 2017-07-18 Бланпэн Са Регулирующий элемент часов

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