EP3736639A1 - Herstellungsverfahren einer spiralfeder für uhrwerk - Google Patents

Herstellungsverfahren einer spiralfeder für uhrwerk Download PDF

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Publication number
EP3736639A1
EP3736639A1 EP19173114.0A EP19173114A EP3736639A1 EP 3736639 A1 EP3736639 A1 EP 3736639A1 EP 19173114 A EP19173114 A EP 19173114A EP 3736639 A1 EP3736639 A1 EP 3736639A1
Authority
EP
European Patent Office
Prior art keywords
weight
deformation
percentage
total
spiral 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.)
Granted
Application number
EP19173114.0A
Other languages
English (en)
French (fr)
Other versions
EP3736639B1 (de
Inventor
Christian Charbon
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 EP19173114.0A priority Critical patent/EP3736639B1/de
Priority to EP21170773.2A priority patent/EP3889691B1/de
Priority to US16/831,913 priority patent/US11550263B2/en
Priority to JP2020068864A priority patent/JP2020183940A/ja
Priority to CN202010372078.1A priority patent/CN111913380B/zh
Priority to CN202411661811.6A priority patent/CN119472216A/zh
Publication of EP3736639A1 publication Critical patent/EP3736639A1/de
Application granted granted Critical
Publication of EP3736639B1 publication Critical patent/EP3736639B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • G04B17/00—Mechanisms for stabilising frequency
    • G04B17/04—Oscillators acting by spring tension
    • G04B17/06—Oscillators with hairsprings, e.g. balance
    • G04B17/066—Manufacture of the spiral spring
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C27/00—Alloys based on rhenium or a refractory metal not mentioned in groups C22C14/00 or C22C16/00
    • C22C27/02—Alloys based on vanadium, niobium, or tantalum
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/16—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon
    • C22F1/18—High-melting or refractory metals or alloys based thereon
    • 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
    • G04B17/00—Mechanisms for stabilising frequency
    • G04B17/04—Oscillators acting by spring tension
    • G04B17/06—Oscillators with hairsprings, e.g. balance
    • 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
    • G04B17/00—Mechanisms for stabilising frequency
    • G04B17/04—Oscillators acting by spring tension
    • G04B17/06—Oscillators with hairsprings, e.g. balance
    • G04B17/063—Balance construction

Definitions

  • the invention relates to a method of manufacturing a spiral spring intended to equip a balance of a clockwork movement. It also relates to the spiral spring resulting from this process produced in an Nb-Hf alloy.
  • spiral springs are also centered on the concern for thermal compensation, so as to guarantee regular chronometric performance. This requires obtaining a thermoelastic coefficient close to zero. We are also looking to produce spiral springs having limited sensitivity to magnetic fields.
  • An object of the present invention is to provide a method of manufacturing a spiral spring intended to equip a balance with a clockwork movement making it possible to facilitate deformation, and more particularly to obtain easy rolling.
  • the invention relates to a method of manufacturing a spiral spring intended to equip a balance of a clockwork movement and made of an alloy comprising niobium and hafnium.
  • the NbHf alloy blank used in the present invention does not include other elements except for possible and inevitable traces. This prevents the formation of fragile phases.
  • the carbon content is less than or equal to 0.04% by weight of the total, in particular less than or equal to 0.02% by weight of the total, or even less than or equal to 0.015% by weight of the total.
  • the iron content is less than or equal to 0.05% by weight of the total, in particular less than or equal to 0.02% by weight of the total, or even less than or equal to 0.005% by weight of the total.
  • the hydrogen content is less than or equal to 0.01% by weight of the total, in particular less than or equal to 0.0035% by weight of the total, or even less than or equal to 0.001% by weight of the total.
  • the nickel content is less than or equal to 0.05% by weight of the total, in particular less than or equal to 0.01% by weight of the total, or even less than or equal to 0.002% by weight of the total.
  • the aluminum content is less than or equal to 0.05% by weight of the total, in particular less than or equal to 0.01% by weight of the total, or even less than or equal to 0.002% by weight of the total.
  • the chromium content is less than or equal to 0.05% by weight of the total, in particular less than or equal to 0.01% by weight of the total, or even less than or equal to 0.002% by weight of the total.
  • the manganese content is less than or equal to 0.05% by weight of the total, in particular less than or equal to 0.01% by weight of the total, or even less than or equal to 0.002% by weight of the total.
  • the vanadium content is less than or equal to 0.05% by weight of the total, in particular less than or equal to 0.01% by weight of the total, or even less than or equal to 0.002% by weight of the total.
  • the tin content is less than or equal to 0.01% by weight of the total, in particular less than or equal to 0.0035% by weight of the total, or even less than or equal to 0.001% by weight of the total.
  • the magnesium content is less than or equal to 0.05% by weight of the total, in particular less than or equal to 0.01% by weight of the total, or even less than or equal to 0.002% by weight of the total.
  • the molybdenum content is less than or equal to 0.05% by weight of the total, in particular less than or equal to 0.01% by weight of the total, or even less than or equal to 0.002% by weight of the total.
  • the lead content is less than or equal to 0.05% by weight of the total, in particular less than or equal to 0.01% by weight of the total, or even less than or equal to 0.002% by weight of the total.
  • the cobalt content is less than or equal to 0.01% by weight of the total, in particular less than or equal to 0.0035% by weight of the total, or even less than or equal to 0.001% by weight of the total.
  • the boron content is less than or equal to 0.005% by weight of the total, in particular less than or equal to 0.0001% by weight of the total.
  • the deposition step which is more particularly the subject of the invention consists in depositing a layer of a ductile material chosen from the group comprising copper, nickel, cupro-nickel, cupro-manganese, gold , silver, nickel-phosphorus Ni-P and nickel-boron Ni-B, to facilitate wire-forming.
  • a ductile material chosen from the group comprising copper, nickel, cupro-nickel, cupro-manganese, gold , silver, nickel-phosphorus Ni-P and nickel-boron Ni-B, to facilitate wire-forming.
  • the thickness of the layer of ductile material deposited is chosen so that the ratio of ductile material surface / surface area of the NbHf alloy for a given wire section is less than 1, preferably less than 0.5, and more preferably between 0.01 and 0.4.
  • the layer of ductile material can have a thickness of 7 ⁇ m for an NbHf alloy section of 0.086 mm in diameter. This corresponds to a ratio between the area of copper (0.002 mm 2 ) and the area of NbHf (0.0058 mm 2 ) of 0.35.
  • Such a thickness of ductile material, and in particular of copper allows the Cu / NbHf composite material to be easily drawn, drawn and rolled. Indeed, the thickness of copper is optimized so that the tip, created by filing or by hot drawing, necessary for the introduction of the wire into the die during drawing or drawing is covered with copper.
  • the deformation step generally denotes one or more deformation treatments, which may include wire drawing and / or rolling.
  • Wire drawing may require the use of one or more dies during the same deformation step or during different deformation steps if necessary.
  • Wire drawing is carried out until a wire of round section is obtained.
  • Rolling can be carried out in the same deformation step as wire drawing or in another subsequent deformation step.
  • the last deformation treatment applied to the alloy is rolling, preferably with a rectangular profile compatible with the entry section of a stranding spindle.
  • the annealing prior to the deformation step as well as the intermediate annealing carried out between the deformation steps is carried out during a period of between 5 minutes and 2 hours, preferably between 10 minutes and 1 hour at a temperature of between 650 ° C and 1750 ° C.
  • the method of the invention enables the production, and more particularly the shaping, of a balance spring for a balance made of a niobium-hafnium type alloy.
  • This alloy has high mechanical properties, by combining a very high elastic limit, greater than 600 MPa, and a very low modulus of elasticity, of the order of 60 GPa to 100 GPa. This combination of properties is well suited for a spiral spring. In addition, such an alloy is paramagnetic.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Springs (AREA)
  • Heat Treatment Of Steel (AREA)
EP19173114.0A 2019-05-07 2019-05-07 Herstellungsverfahren einer spiralfeder für uhrwerk Active EP3736639B1 (de)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP19173114.0A EP3736639B1 (de) 2019-05-07 2019-05-07 Herstellungsverfahren einer spiralfeder für uhrwerk
EP21170773.2A EP3889691B1 (de) 2019-05-07 2019-05-07 Uhrspiralfeder aus nb-hf-legierung
US16/831,913 US11550263B2 (en) 2019-05-07 2020-03-27 Method for manufacturing a balance spring for a horological movement
JP2020068864A JP2020183940A (ja) 2019-05-07 2020-04-07 計時器用ムーブメントのためのバランスばねを製造する方法
CN202010372078.1A CN111913380B (zh) 2019-05-07 2020-05-06 制造钟表机芯的游丝的方法
CN202411661811.6A CN119472216A (zh) 2019-05-07 2020-05-06 制造钟表机芯的游丝的方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19173114.0A EP3736639B1 (de) 2019-05-07 2019-05-07 Herstellungsverfahren einer spiralfeder für uhrwerk

Related Child Applications (2)

Application Number Title Priority Date Filing Date
EP21170773.2A Division-Into EP3889691B1 (de) 2019-05-07 2019-05-07 Uhrspiralfeder aus nb-hf-legierung
EP21170773.2A Division EP3889691B1 (de) 2019-05-07 2019-05-07 Uhrspiralfeder aus nb-hf-legierung

Publications (2)

Publication Number Publication Date
EP3736639A1 true EP3736639A1 (de) 2020-11-11
EP3736639B1 EP3736639B1 (de) 2024-07-03

Family

ID=66448420

Family Applications (2)

Application Number Title Priority Date Filing Date
EP21170773.2A Active EP3889691B1 (de) 2019-05-07 2019-05-07 Uhrspiralfeder aus nb-hf-legierung
EP19173114.0A Active EP3736639B1 (de) 2019-05-07 2019-05-07 Herstellungsverfahren einer spiralfeder für uhrwerk

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP21170773.2A Active EP3889691B1 (de) 2019-05-07 2019-05-07 Uhrspiralfeder aus nb-hf-legierung

Country Status (4)

Country Link
US (1) US11550263B2 (de)
EP (2) EP3889691B1 (de)
JP (1) JP2020183940A (de)
CN (2) CN119472216A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115079542A (zh) * 2021-03-16 2022-09-20 尼瓦罗克斯-法尔股份公司 用于钟表机芯的螺旋弹簧

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4060425B1 (de) * 2021-03-16 2024-10-16 Nivarox-FAR S.A. Spiralfeder für uhrwerk
EP4123393B1 (de) 2021-07-23 2025-04-16 Nivarox-FAR S.A. Spiralfeder für uhrwerk

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0886195A1 (de) * 1997-06-20 1998-12-23 Montres Rolex Sa Selbstkompensierende Spiralfeder für mechanische Uhrwerkunruhspiralfederoszillator und Verfahren zu deren Herstellung
EP1258786A1 (de) * 2001-05-18 2002-11-20 Montres Rolex Sa Selbstkompensierende Feder für einen mechanischen Oszillator vom Unruh-Spiralfeder-Typ

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1521206A (fr) * 1966-06-08 1968-04-12 Vacuumschmelze Gmbh Procédé pour la préparation d'alliages non ferromagnétiques dont le coefficient de température du module d'élasticité est réglable, ainsi que les produits conformes à ceux obtenus par le présent procédé ou procédé similaire
EP1039352B1 (de) * 1999-03-26 2003-10-08 Rolex Sa Selbstkompensierende Spiralfeder für Uhrwerkspiralfederunruh und Verfahren zur Behandlung derselben
JP2005140674A (ja) * 2003-11-07 2005-06-02 Seiko Epson Corp 時計用ばね、ぜんまい、ひげぜんまい、及び時計
US10372083B2 (en) * 2012-07-06 2019-08-06 Rolex Sa Method for treating a surface of a timepiece component, and timepiece component obtained from such a method
JP5859132B2 (ja) * 2012-08-31 2016-02-10 シチズンホールディングス株式会社 機械式時計用ひげぜんまい材料とこれを用いたひげぜんまい
EP3040790A1 (de) * 2014-12-29 2016-07-06 Montres Breguet S.A. Uhr oder Schmuckgegenstand aus einer leichten hochwertigen Legierung auf Titanbasis
EP3252542B1 (de) * 2016-06-01 2022-05-18 Rolex Sa Teil zur befestigung einer unruhspirale
EP3422116B1 (de) * 2017-06-26 2020-11-04 Nivarox-FAR S.A. Spiralfeder eines uhrwerks

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0886195A1 (de) * 1997-06-20 1998-12-23 Montres Rolex Sa Selbstkompensierende Spiralfeder für mechanische Uhrwerkunruhspiralfederoszillator und Verfahren zu deren Herstellung
EP1258786A1 (de) * 2001-05-18 2002-11-20 Montres Rolex Sa Selbstkompensierende Feder für einen mechanischen Oszillator vom Unruh-Spiralfeder-Typ

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115079542A (zh) * 2021-03-16 2022-09-20 尼瓦罗克斯-法尔股份公司 用于钟表机芯的螺旋弹簧
EP4060424A1 (de) * 2021-03-16 2022-09-21 Nivarox-FAR S.A. Spiralfeder für uhrwerk
US11898225B2 (en) 2021-03-16 2024-02-13 Nivarox-Far S.A. Spiral spring for a horological movement

Also Published As

Publication number Publication date
EP3736639B1 (de) 2024-07-03
EP3889691A1 (de) 2021-10-06
US11550263B2 (en) 2023-01-10
CN111913380A (zh) 2020-11-10
JP2020183940A (ja) 2020-11-12
CN119472216A (zh) 2025-02-18
US20200356057A1 (en) 2020-11-12
CN111913380B (zh) 2025-01-17
EP3889691B1 (de) 2024-02-21

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