EP2680090A1 - Triebfeder für Uhr - Google Patents

Triebfeder für Uhr Download PDF

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Publication number
EP2680090A1
EP2680090A1 EP13169865.6A EP13169865A EP2680090A1 EP 2680090 A1 EP2680090 A1 EP 2680090A1 EP 13169865 A EP13169865 A EP 13169865A EP 2680090 A1 EP2680090 A1 EP 2680090A1
Authority
EP
European Patent Office
Prior art keywords
blade
metal
predetermined depth
mainspring
motor spring
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.)
Ceased
Application number
EP13169865.6A
Other languages
English (en)
French (fr)
Inventor
Christian Charbon
Maxime GOVAERTS
Cédric Von Grünigen
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.)
Nivarox Far SA
Nivarox SA
Original Assignee
Nivarox Far SA
Nivarox 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 Nivarox Far SA, Nivarox SA filed Critical Nivarox Far SA
Priority to EP13169865.6A priority Critical patent/EP2680090A1/de
Publication of EP2680090A1 publication Critical patent/EP2680090A1/de
Ceased 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49609—Spring making

Definitions

  • the invention relates to a mainspring for a timepiece and in particular for a mainspring intended to be integrated into a cylinder.
  • Nivaflex 45/5 it is known to use the Nivaflex 45/5 to form a mainspring barrel. This material offers a high elastic limit typically of 3100 MPa and a high modulus typically of 220 GPa.
  • the object of the present invention is to overcome all or part of the drawbacks mentioned above by proposing an alternating monobloc motor-spring allowing both to limit the sensitivity to the magnetic fields, to obtain a lower elastic modulus while having in the zones main stress an improved elastic limit.
  • the invention relates to a motor spring comprising a metal blade characterized in that the metal is austenitic type steel to limit its sensitivity to magnetic fields and in that at least the surface outer blade is cured relative to the remainder of the blade to a predetermined depth to harden the blade at the main stress zones while keeping the elastic modulus of the austenitic steel.
  • the mainspring allows cumulative advantages such as low sensitivity to magnetic fields, low elastic modulus and, in the main stress zones, a high elastic limit, in addition to good resistance to corrosion and fatigue.
  • the invention relates to a cylinder for a timepiece characterized in that it comprises a mainspring according to one of the preceding variants
  • the invention relates to a mainspring as for a barrel of a timepiece.
  • a mainspring as for a barrel of a timepiece.
  • other applications requiring a mainspring are possible such as an automaton.
  • the motor spring 1 comprises a blade 3 of metal and preferably wound on itself.
  • a blade 3 of metal and preferably wound on itself.
  • stresses which are essentially applied to the outer surface of the blade 3, that is to say along the length l , the height h and l thickness e.
  • the stresses decrease from the outer surface to the center of the blade 3 where the stresses are zero.
  • the metal 5 is austenitic type steel and, preferably, stainless, in order to advantageously limit its sensitivity to magnetic fields.
  • at least the outer surface 7 of the blade is hardened with respect to the remainder of the blade to a predetermined depth so as to offer, advantageously according to the invention, a high elastic limit at said outer surface while keeping a low elastic modulus.
  • the elastic limit of the cured outer surface 7 comprises an elastic limit of between 3500 and 4500 MPa while the elastic modulus remains substantially equal to or less than 190 GPa for a surface curing greater than 1100 HV and advantageously between 1200 HV and 2000 HV
  • the above values were obtained from 316L stainless steel nickel chromium austenitic steel. Of course, other austenitic steels are possible.
  • a curing depth of between 5% and 40% of the total thickness e of the blade 3 is sufficient for application to a mainspring.
  • the depth of hardening is preferably around 15 microns all around the blade 3.
  • a different depth of hardening 7 between 5% and 80% of the total thickness e may be provided.
  • the hardened outer surface 7 comprises diffused atoms of at least one non-metal such as nitrogen and / or carbon.
  • a surface area 7 is cured without having to deposit a second material over the blade 3.
  • the curing 7 is carried out directly in the material 5 of the blade 3 which advantageously allows according to the invention to avoid any posterior delamination.
  • At least one surface area 7 is hardened, that is to say that the core of the blade 3 can remain little or no change without significant modification of the qualities of the mainspring.
  • the blade 3 is wound during step a) in order to directly diffuse the atoms according to the final shape of the mainspring 1.
  • the blade 3 can also be wound after step b) in order to diffuse the atoms according to an intermediate blank of the mainspring 1.
  • step b) may consist of a thermochemical treatment such as a carburizing or nitriding of several motor springs and / or several blanks of motor springs. It is understood that step b) may consist in interstitially diffusing into the steel 5, nonmetallic atoms such as nitrogen and / or carbon. Finally, advantageously, it has been found that the compressive stresses of the process improve the fatigue resistance.
  • Step b) could also consist of an ion implantation process and diffusion treatment.
  • This variant has the advantage of not limiting the type of diffused atoms and allowing an interstitial as well as a substitutional diffusion.
  • the present invention is not limited to the illustrated example but is susceptible of various variations and modifications that will occur to those skilled in the art.
  • it can be envisaged to totally or almost totally treat the blade 3, that is to say treat a percentage greater than 80% of the thickness e of the blade 3 even if it is not necessary for the application to a spiral spring.

Landscapes

  • Engineering & Computer Science (AREA)
  • Metallurgy (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Springs (AREA)
  • Heat Treatment Of Articles (AREA)
EP13169865.6A 2012-06-28 2013-05-30 Triebfeder für Uhr Ceased EP2680090A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP13169865.6A EP2680090A1 (de) 2012-06-28 2013-05-30 Triebfeder für Uhr

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP12174134 2012-06-28
EP13169865.6A EP2680090A1 (de) 2012-06-28 2013-05-30 Triebfeder für Uhr

Publications (1)

Publication Number Publication Date
EP2680090A1 true EP2680090A1 (de) 2014-01-01

Family

ID=48470866

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13169865.6A Ceased EP2680090A1 (de) 2012-06-28 2013-05-30 Triebfeder für Uhr

Country Status (5)

Country Link
US (1) US20140003203A1 (de)
EP (1) EP2680090A1 (de)
JP (1) JP5766751B2 (de)
CN (2) CN109884870A (de)
RU (1) RU2634790C2 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3002635A1 (de) 2014-09-29 2016-04-06 Richemont International S.A. Herstellungsverfahren eines federelements für uhrwerk oder anderes präzisionsinstrument
EP3208664A1 (de) * 2016-02-19 2017-08-23 Creaditive AG Ritzelwelle, uhrwerk, uhr oder messgerät ohne magnetische signatur
EP3273305A1 (de) * 2016-07-19 2018-01-24 Nivarox-FAR S.A. Bauteil für uhrwerk
EP3273303A1 (de) * 2016-07-19 2018-01-24 Nivarox-FAR S.A. Bauteil für uhrwerk

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2867734B1 (de) * 2012-06-28 2016-05-04 Nivarox-FAR S.A. Triebfeder für uhr
EP3009896B1 (de) * 2014-10-17 2020-03-11 Nivarox-FAR S.A. Elektrogeformtes monoblock-metallteil
US10327151B2 (en) * 2015-04-14 2019-06-18 ETAK Systems, LLC Wireless coverage testing systems and methods with unmanned aerial vehicles
US10192354B2 (en) * 2015-04-14 2019-01-29 ETAK Systems, LLC Systems and methods for obtaining accurate 3D modeling data using UAVS for cell sites
US20160342934A1 (en) * 2015-05-22 2016-11-24 Peter Michalik System and process for communicating between a drone and a handheld device
WO2017192488A1 (en) * 2016-05-04 2017-11-09 Wal-Mart Stores, Inc. Systems and methods for transporting products via unmanned aerial vehicles

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH323662A (de) * 1953-10-15 1957-08-15 Reinhard Dr Straumann Verfahren zur Herstellung einer Triebfeder für Uhren und nach diesem Verfahren erhaltene Triebfeder
US20020191493A1 (en) * 2000-07-11 2002-12-19 Tatsuo Hara Spring, drive mechanism, device and timepiece using the spring

Family Cites Families (19)

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Publication number Priority date Publication date Assignee Title
US1977458A (en) * 1933-12-16 1934-10-16 Gillette Safety Razor Co Bimetallic spring
GB506307A (en) * 1937-06-02 1939-05-25 Fabriques De Spiraux Reunies S Process for the manufacture of compensating spiral springs for watches, chronometers and the like
GB722427A (en) * 1950-12-12 1955-01-26 Sandvikens Jernverks Ab Improvements in or relating to corrosion resistant steel springs and spring materialand methods for making same
CH367756A (de) * 1960-05-20 1963-04-11 Scott Rogerson Harold Einrichtung zur Verminderung der Gefahr des Überdrehens von Uhrwerkfedern
FR1493033A (fr) * 1966-07-12 1967-08-25 Soc Metallurgique Imphy Alliages fer-nickel-chrome-molybdène amagnétiques et spiraux de montre obtenus avecces alliages
CH535989A (de) * 1968-08-19 1972-11-30 Straumann Inst Ag Zeithaltendes Element
US3928085A (en) * 1972-05-08 1975-12-23 Suwa Seikosha Kk Timepiece mainspring of cobalt-nickel base alloys having high elasticity and high proportional limit
US4622081A (en) * 1984-12-14 1986-11-11 Ford Motor Company Formable, temperature-resistant martensitic steel having enhanced resistance to wear
US5549370A (en) * 1994-11-07 1996-08-27 Folsom; Mark F. Fiber-reinforced plastic springs with helical fiber wind
ES2171872T3 (es) * 1997-06-20 2002-09-16 Rolex Montres Espiral autocompensadora para oscilador mecanico de balancin-espiral para dispositivo de movimiento de relojeria y procedimiento de fabricacion de la espiral.
WO1999012080A1 (fr) * 1997-08-28 1999-03-11 Seiko Epson Corporation Ressort, ressort moteur, ressort spiral, mecanisme d'entrainement employant ceux-ci, et compteur de temps
JP3757872B2 (ja) * 2002-01-23 2006-03-22 セイコーエプソン株式会社 動力伝達用歯車、およびこれを備えた機器
EP1422436B1 (de) * 2002-11-25 2005-10-26 CSEM Centre Suisse d'Electronique et de Microtechnique SA Spiraluhrwerkfeder und Verfahren zu deren Herstellung
DE602004026849D1 (de) * 2004-07-02 2010-06-10 Nivarox Sa Spiralfeder mit modifizierter Aussenkurve
EP1886194A2 (de) * 2005-05-14 2008-02-13 Gideon Levingston Unruhe, regulierte unruhebaugruppe und herstellungsverfahren dafür
US8240910B2 (en) * 2006-12-21 2012-08-14 Complitime S.A. Mechanical oscillator for timepiece
EP2351860B1 (de) * 2008-10-08 2014-04-09 Barth, Peter Verwendung eines biokompatiblen Werkstoffs aus Edelstahl mit einer martensitischen Randschicht, für Implantate
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
CH703796B1 (fr) * 2010-10-28 2012-03-30 Gen Ressorts Sa Ressort.

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH323662A (de) * 1953-10-15 1957-08-15 Reinhard Dr Straumann Verfahren zur Herstellung einer Triebfeder für Uhren und nach diesem Verfahren erhaltene Triebfeder
US20020191493A1 (en) * 2000-07-11 2002-12-19 Tatsuo Hara Spring, drive mechanism, device and timepiece using the spring

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3002635A1 (de) 2014-09-29 2016-04-06 Richemont International S.A. Herstellungsverfahren eines federelements für uhrwerk oder anderes präzisionsinstrument
EP3208664A1 (de) * 2016-02-19 2017-08-23 Creaditive AG Ritzelwelle, uhrwerk, uhr oder messgerät ohne magnetische signatur
EP3273305A1 (de) * 2016-07-19 2018-01-24 Nivarox-FAR S.A. Bauteil für uhrwerk
EP3273303A1 (de) * 2016-07-19 2018-01-24 Nivarox-FAR S.A. Bauteil für uhrwerk
US11131965B2 (en) 2016-07-19 2021-09-28 Nivarox-Far S.A. Component for a timepiece movement

Also Published As

Publication number Publication date
RU2634790C2 (ru) 2017-11-03
RU2013129529A (ru) 2015-01-10
JP2014010155A (ja) 2014-01-20
US20140003203A1 (en) 2014-01-02
CN103529682A (zh) 2014-01-22
JP5766751B2 (ja) 2015-08-19
CN109884870A (zh) 2019-06-14

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