EP3502787A1 - Herstellungsverfahren einer unruh für uhren - Google Patents

Herstellungsverfahren einer unruh für uhren Download PDF

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Publication number
EP3502787A1
EP3502787A1 EP17210299.8A EP17210299A EP3502787A1 EP 3502787 A1 EP3502787 A1 EP 3502787A1 EP 17210299 A EP17210299 A EP 17210299A EP 3502787 A1 EP3502787 A1 EP 3502787A1
Authority
EP
European Patent Office
Prior art keywords
metal alloy
serge
balance
ppm
hub
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
EP17210299.8A
Other languages
English (en)
French (fr)
Other versions
EP3502787B1 (de
Inventor
Alexandre Haemmerli
François Gueissaz
Jean-Claude Martin
Lionel Paratte
Yves Winkler
Gianni Di Domenico
Pascal Winkler
Jean-Luc Helfer
Lionel TOMBEZ
Baptiste Hinaux
Donald William Corson
Michel Willemin
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.)
Swatch Group Research and Development SA
Original Assignee
Swatch Group Research and Development 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 Swatch Group Research and Development SA filed Critical Swatch Group Research and Development SA
Priority to EP17210299.8A priority Critical patent/EP3502787B1/de
Priority to EP20201790.1A priority patent/EP3796102B1/de
Priority to US16/150,524 priority patent/US11307535B2/en
Priority to JP2018216249A priority patent/JP6770049B2/ja
Priority to CN201811455309.4A priority patent/CN109960137B/zh
Priority to CN202110265760.5A priority patent/CN112965355A/zh
Publication of EP3502787A1 publication Critical patent/EP3502787A1/de
Application granted granted Critical
Publication of EP3502787B1 publication Critical patent/EP3502787B1/de
Priority to US17/669,476 priority patent/US11640140B2/en
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
    • G04B17/20—Compensation of mechanisms for stabilising frequency
    • G04B17/22—Compensation of mechanisms for stabilising frequency for the effect of variations of temperature
    • G04B17/227—Compensation of mechanisms for stabilising frequency for the effect of variations of temperature composition and manufacture of the material used
    • 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
    • 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
    • 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
    • G04B17/20—Compensation of mechanisms for stabilising frequency
    • G04B17/22—Compensation of mechanisms for stabilising frequency for the effect of variations of temperature
    • G04B17/222—Compensation of mechanisms for stabilising frequency for the effect of variations of temperature with balances
    • 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
    • G04B18/00—Mechanisms for setting frequency
    • G04B18/006—Mechanisms for setting frequency by adjusting the devices fixed on the balance
    • 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
    • G04D3/0035—Watchmakers' or watch-repairers' machines or tools for working materials for mechanical working other than with a lathe for components of the regulating mechanism
    • G04D3/0038—Watchmakers' or watch-repairers' machines or tools for working materials for mechanical working other than with a lathe for components of the regulating mechanism for balances
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D15/00—Casting using a mould or core of which a part significant to the process is of high thermal conductivity, e.g. chill casting; Moulds or accessories specially adapted therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D25/00—Special casting characterised by the nature of the product
    • B22D25/02—Special casting characterised by the nature of the product by its peculiarity of shape; of works of art
    • B22D25/026—Casting jewelry articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
    • B22D27/04—Influencing the temperature of the metal, e.g. by heating or cooling the mould
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C14/00—Alloys based on titanium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C16/00—Alloys based on zirconium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C3/00—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means
    • G04C3/04—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means wherein movement is regulated by a balance

Definitions

  • the invention relates to a method of manufacturing a balance for a timepiece comprising a serge, a hub and at least one arm connecting the hub to said serge.
  • the oscillator or resonator of a mechanical watch consists of a spiral spring and a flywheel called balance.
  • the thermal variations vary the stiffness of the hairspring, as well as the geometries of the hairspring and the balance, which modifies the spring constant and the inertia, and therefore the frequency of oscillation.
  • Watchmakers have worked hard to have temperature-stable oscillators and several tracks have been explored / exploited, including one that won a Charles-Edouard Nicolas Nobel Prize for the development of the Elinvar alloy whose elastic modulus increases with the temperature and compensates for the increase of inertia of the pendulum.
  • the monocrystalline quartz spiral allows a thermal compensation of the change of inertia of the balance.
  • the quartz is limited to materials having a coefficient of thermal expansion of the order of 10 ppm / ° C, which corresponds for example titanium and platinum.
  • the main problem of these materials is the machinability and control of fine structure and / or a perfect finish (mirror polished by example).
  • titanium its relatively low density limits its use for large pendulums and in the case of platinum its high price limits its use to prestige and luxury products.
  • the object of the present invention is to remedy these drawbacks by proposing a method of manufacturing a balance made of new materials allowing a simpler and more precise manufacture, so as to reduce, for example, the dispersion of inertia and / or unbalance within the same batch of production.
  • a metal alloy balance can be realized using a simplified manufacturing process such as a casting process or a hot forming process.
  • the metal alloy in its at least partially amorphous form has the property of having a much larger elastic range than its crystalline equivalent, thanks to the absence of dislocation. This property makes it possible to overmould or integrate the balance wheel elements to improve the centering and to adjust the inertia and / or unbalance.
  • a pendulum 1 for a timepiece Such a rocker 1 comprises in a traditional way a serge 2, continuous or not, defining the outer diameter of the rocker 1, a hub 4, forming its central portion and provided with a hole 6 for receiving a shaft (not shown) defining the pivot axis of the balance 1.
  • the hub 4 is integrally connected to the serge 2 by arms 8.
  • the arms 8 are here four in number and are arranged at 90 °. We also usually find rockers with two or three arms, arranged respectively at 180 ° or 120 °.
  • the serge 2, the hub 4 and the arms 8 are made of the same metal alloy.
  • the rocker 1 is monobloc, that is to say, made in one piece.
  • the balance 1 may for example be made entirely of a platinum or palladium-based alloy which will be described in detail below. Platinum in particular having a high density (21000 kg / m 3 ), the platinum alloy used in the invention also has a high density (15.5 g / cm 3 ), so that the addition of elements in dense material to increase the inertia of the pendulum will not necessarily be necessary.
  • the cooling step d) can be carried out at a cooling rate chosen to obtain a crystalline, partially amorphous or totally amorphous alloy.
  • the balance 1 can also be made entirely for example in a titanium-based alloy or zirconium which will be described in detail below. Since zirconium, for example, has a lower density, the zirconium alloy used in the invention also has a lower density (6.5 g / cm 3 ), so that the addition of denser material elements to increase the inertia of the balance is recommended, especially if one wishes to realize a small balance for small movements. These elements make it possible to increase the inertia of the balance while keeping an aesthetic serge geometry and with good aerodynamic properties.
  • the serge 2 may comprise overmolded first inertia adjusting elements 10, said first inertia adjusting elements being made of a material having a density greater than the density of the metal alloy.
  • These first adjustment elements of the inertia 10 may for example be tungsten or tungsten carbide, and are obtained by overmolding.
  • the method according to the invention comprises a step of overmoulding said first inertia adjusting elements 10 in the serge 2, by means of inserts placed in the mold before the introduction of the metal alloy, and overmoulded, said first inertia adjusting members being made of a first material having a density greater than the density of said metal alloy.
  • the arms and the hub of the balance are made of a metal alloy, the serge being made of a material having a density greater than the density of said metal alloy used for the arms and the hub.
  • This material may itself be the platinum or palladium-based metal alloy as defined below or another material.
  • the arms and the hub of the balance are made of the zirconium-based amorphous metal alloy as defined below to make it possible to couple the balance with a spiral, preferably in monocrystalline quartz, and the serge is made in another material having a density greater than the density of the alloy zirconium-based metal used for the arms and the hub to improve the inertia of the balance.
  • the cooling step d) can be carried out at a cooling rate chosen to obtain a crystalline, partially amorphous or totally amorphous alloy.
  • the methods of the invention according to the first or second embodiments advantageously utilize the properties of a metal alloy capable of being in at least partially amorphous form when heated to easily form it to realize a metal alloy balance.
  • a metal alloy capable of being in a form at least partially amorphous when heated allows a great ease in shaping allowing the manufacture of parts with complicated shapes with greater precision.
  • the use of such a material also makes it possible to reproduce fine geometries very precisely because the viscosity of the alloy decreases sharply as a function of the temperature in the temperature range [Tg-Tx] and the alloy thus allies the details of the negative.
  • the shaping is done around 300 ° C for a viscosity up to 10 3 Pa.s for a stress of 1 MPa, instead of a viscosity from 10 to 12 Pa.s at the Tg temperature.
  • the use of dies has the advantage of creating highly accurate three-dimensional parts, which can not be cut or stamped.
  • a method advantageously used is the hot forming of an amorphous preform.
  • This preform is obtained by melting in a furnace metal elements intended to form the metal alloy. This fusion is done under controlled atmosphere with the aim of obtaining a contamination of the alloy with oxygen as low as possible. Once these elements are melted, they are cast as a semi-finished product, then cooled rapidly to maintain the partially or totally amorphous state.
  • the hot forming is performed in order to obtain a final piece. This hot forming is carried out by pressing in a temperature range between the glass transition temperature Tg and the crystallization temperature Tx of the metal alloy for a predetermined time to maintain an at least partially amorphous structure. This is done in order to maintain the characteristic elastic properties of the amorphous metals.
  • the pendulum can also be made by casting or injection. This process consists of casting or injecting the heated metal alloy at a temperature between its transition temperature vitreous and its crystallization temperature to be at least partially amorphous in a mold having the shape of the final piece.
  • the mold can be reused or dissolved to free the parts.
  • the molding process has the advantage of perfectly replicating the geometry of the balance, including any decorations or surface patterning. Less dispersion of inertia and better centering on a rocker production batch are obtained.
  • the molding process provides a balance with aesthetic geometry, with sharp interior angles, a serge profile and / or curved arm, and a perfect finish. It is also possible to provide a non-continuous serge.
  • the mold will be made of silicon by a DRIE process. It is obvious that the mold can also be produced by machining by milling, laser, spark erosion or any other type of machining.
  • the characteristic elastic properties of the amorphous metals are used to overmold or integrate functional and / or decorative elements in the serge and / or at the arms and / or at the hub for example by means of corresponding inserts placed in the mold before introducing the heated metal alloy between its glass transition temperature and its crystallization temperature to be at least partially amorphous.
  • the serge 2 may comprise housings 12 intended to receive second inertia and / or unbalance adjusting elements 14, 15 as shown in FIG. figure 3 .
  • These housings 12 may advantageously be provided during the manufacture of the balance 1 by molding, in accordance with the methods of the invention.
  • the second adjustment elements of the inertia and / or unbalance 14, 15 may be for example flyweights, slit weights, pins 14, cotter pins, or pins with unbalance 15, which act as flyweights. These elements are hunted or clipped in the dwellings 12.
  • On the figure 3 are represented a pin 14 inserted into its housing 12, and a pin with unbalance 15 inserted into its housing 12.
  • the figure 4 shows a sectional view along line AA of the figure 3 representing the pin with unbalance 15 inserted in the housing 12 provided in the serge 2.
  • the dwellings 12 shown on the figure 3 may also constitute housings intended to receive aesthetic and / or luminescent elements, such as tritium tubes (not shown), or capsules of phosphorescent materials (Superluminova, for example) or fluorescent.
  • aesthetic and / or luminescent elements such as tritium tubes (not shown), or capsules of phosphorescent materials (Superluminova, for example) or fluorescent.
  • one or the other of the methods comprises a step of overmolding flexible centering elements 16, 17 on the hub 4, on its inner periphery or on its surface.
  • the hub 4 may include integrated flexible centering elements, which allow self-centering of the balance when mounted on an axis by the elastic deformation of said flexible centering elements.
  • said integrated flexible centering elements 16 are resilient blades provided on the inner periphery of the hub 4 so as to be positioned in the hole 6.
  • said integrated flexible centering elements 17 are provided on the surface of the hub 4 and are distributed around the hole 6. The flexible centering elements 16 and 17 can advantageously be put in place during the manufacture of the balance 1 by molding, in accordance with the methods of the invention.
  • one or the other of the methods comprises a step of overmolding third inertia adjusting elements 19, 20, 22a, 22b flexible in the arm 8.
  • at least one of one of the arms 8 carries third integrated flexible inertia adjustment elements.
  • a third flexible buckling inertia adjusting member 20 is provided in the housing 18 for adjusting the frequency.
  • the third adjustment element of the inertia 20 is made of a material having different expansion properties of the metal alloy of the balance of the invention, such as silicon or silicon oxide.
  • the end of the arm 8 on the side of the serge 2 ends in three branches 8a, 8b, 8c forming between them two housings 18a, 18b in which are incorporated third inertia adjusting elements 22a, 22b flexible multi- stable ratchet for frequency adjustment.
  • These third flexible inertia adjusting elements 19, 20, 22a, 22b for adjusting the frequency can be used as well when the entire balance is in the same metal alloy as when the arms are made of metal alloy, the balance of the balance, and in particular the serge, being in another material.
  • a mold having microstructures forming a decor or a photonic network it is used in one or other of the methods of the invention a mold having microstructures forming a decor or a photonic network.
  • one of the arm 8, the serge 2 and the hub 4 has a structured surface state. Only one of the elements may have a structured surface condition or all the elements of the balance may have a structured surface state, this structured surface state may be the same or different.
  • the figure 10 represents a pendulum of the invention for which the serge 2 has a structured surface state different from the structured surface state presented by the arm 8. This structured surface state can be a polished, satin, sandblasted, pearled, sunny state etc.
  • microstructures forming a photonic network in order to replicate these microstructures on the surface of the balance.
  • These microstructures can make it possible to create a photonic crystal giving the piece a certain color, a hologram, or a diffraction grating that can constitute an anti-counterfeiting element.
  • the structures are directly introduced into the mold, and are replicated during the manufacture of the balances by hot forming, which no longer requires termination operations. It is also possible to add a logo to the mold.
  • the metal alloy used in the processes of the invention has a coefficient of thermal expansion typically less than 25 ppm / ° C and greater than 7 ppm / ° C, and is capable of being in at least partially amorphous form when it is heated to a temperature between its glass transition temperature and its crystallization temperature.
  • the metal alloy used in the processes of the invention is based on an element selected from the group consisting of platinum, zirconium, titanium, palladium, nickel, aluminum and iron.
  • element-based means that said metal alloy contains at least 50% by weight of said element.
  • Said metal alloy used in the present invention may be platinum-based and has a coefficient of thermal expansion of less than 12 ppm / ° C, preferably between 8 ppm / ° C and 12 ppm / ° C.
  • the metal alloy used in the present invention can also be based on zirconium and has a coefficient of thermal expansion of less than 12 ppm / ° C, preferably between 8 ppm / ° C and 11 ppm / ° C.
  • the metal alloy used in the present invention may also be based on palladium and has a coefficient of thermal expansion less than 20 ppm / ° C, preferably between 13 ppm / ° C and 18 ppm / ° C.
  • the alloys used in the invention contain no impurities. However, they may include traces of impurities that can result, often unavoidably, the development of said alloys.
  • the alloys used in the present invention have a coefficient of thermal expansion less than 12 ppm / ° C and greater than 8 ppm / ° C, they can be used to achieve at least a portion of a balance that will be paired with a hairspring preferably monocrystalline quartz.
  • the alloys used in the present invention having a coefficient of thermal expansion of less than 20 ppm / ° C and greater than 13 ppm / ° C can be used to make at least a portion of a pendulum that will be paired with a metal hairspring or in silicon.
  • Such an alloy has a coefficient of thermal expansion of between 11 and 12 ppm / ° C.
  • Such an alloy has a coefficient of thermal expansion of between 10.5 and 11 ppm / ° C.
  • Such an alloy has a coefficient of thermal expansion of between 15 and 16 ppm / ° C.
  • the balance according to the invention is made of a material that makes it possible to use a simple manufacturing process while having a coefficient of thermal expansion that makes it possible to match it to a monocrystalline quartz spiral, and / or to a metal or silicon preferably monocrystalline quartz.
  • the balance according to the invention also makes it possible to have at least arms having a coefficient of thermal expansion enabling it to be paired with a spiral of monocrystalline quartz, and / or of metal or silicon, while having great inertia while keeping a compact and aesthetic serge geometry, of small volume, using a suitable serge, or comprising elements made of a material of greater density, or being itself made of a material of greater density.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Metallurgy (AREA)
  • Manufacturing & Machinery (AREA)
  • Adornments (AREA)
  • Forging (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Micromachines (AREA)
EP17210299.8A 2017-12-22 2017-12-22 Herstellungsverfahren einer unruh für uhren Active EP3502787B1 (de)

Priority Applications (7)

Application Number Priority Date Filing Date Title
EP17210299.8A EP3502787B1 (de) 2017-12-22 2017-12-22 Herstellungsverfahren einer unruh für uhren
EP20201790.1A EP3796102B1 (de) 2017-12-22 2017-12-22 Verfahren zur herstellung einer unruh für uhren
US16/150,524 US11307535B2 (en) 2017-12-22 2018-10-03 Process for producing a balance wheel for a timepiece
JP2018216249A JP6770049B2 (ja) 2017-12-22 2018-11-19 計時器用のバランス車を製造する方法
CN201811455309.4A CN109960137B (zh) 2017-12-22 2018-11-30 用于制造钟表的摆轮的方法
CN202110265760.5A CN112965355A (zh) 2017-12-22 2018-11-30 用于制造钟表的摆轮的方法
US17/669,476 US11640140B2 (en) 2017-12-22 2022-02-11 Process for producing a balance wheel for a timepiece

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP17210299.8A EP3502787B1 (de) 2017-12-22 2017-12-22 Herstellungsverfahren einer unruh für uhren

Related Child Applications (2)

Application Number Title Priority Date Filing Date
EP20201790.1A Division EP3796102B1 (de) 2017-12-22 2017-12-22 Verfahren zur herstellung einer unruh für uhren
EP20201790.1A Division-Into EP3796102B1 (de) 2017-12-22 2017-12-22 Verfahren zur herstellung einer unruh für uhren

Publications (2)

Publication Number Publication Date
EP3502787A1 true EP3502787A1 (de) 2019-06-26
EP3502787B1 EP3502787B1 (de) 2020-11-18

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EP20201790.1A Active EP3796102B1 (de) 2017-12-22 2017-12-22 Verfahren zur herstellung einer unruh für uhren
EP17210299.8A Active EP3502787B1 (de) 2017-12-22 2017-12-22 Herstellungsverfahren einer unruh für uhren

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US (2) US11307535B2 (de)
EP (2) EP3796102B1 (de)
JP (1) JP6770049B2 (de)
CN (2) CN112965355A (de)

Cited By (3)

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Publication number Priority date Publication date Assignee Title
CH716669A1 (fr) * 2019-10-03 2021-04-15 Richemont Int Sa Procédé de fabrication d'un arbre de pivotement de balancier.
CN115537598A (zh) * 2022-10-10 2022-12-30 东莞理工学院 一种宽温域可调控线性低热膨胀钛铌合金及其制备方法
CN115537599A (zh) * 2022-10-13 2022-12-30 东莞理工学院 一种高弹性模量及近零线膨胀系数的钛铌合金及其制备方法

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Publication number Priority date Publication date Assignee Title
EP3796101A1 (de) * 2019-09-20 2021-03-24 Nivarox-FAR S.A. Spiralfeder für uhrwerk

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EP2395402A1 (de) * 2010-06-11 2011-12-14 Montres Breguet SA Hochfrequenzunruh für Uhr
EP2703909A1 (de) * 2012-09-04 2014-03-05 The Swatch Group Research and Development Ltd. Gepaarter Spiralunruh-Schwinger
EP3170579A1 (de) * 2015-11-18 2017-05-24 The Swatch Group Research and Development Ltd. Verfahren zur herstellung eines teils aus amorphem metall

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CH716669A1 (fr) * 2019-10-03 2021-04-15 Richemont Int Sa Procédé de fabrication d'un arbre de pivotement de balancier.
CN115537598A (zh) * 2022-10-10 2022-12-30 东莞理工学院 一种宽温域可调控线性低热膨胀钛铌合金及其制备方法
CN115537598B (zh) * 2022-10-10 2023-06-20 东莞理工学院 一种宽温域可调控线性低热膨胀钛铌合金及其制备方法
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CN115537599B (zh) * 2022-10-13 2023-06-06 东莞理工学院 一种高弹性模量及近零线膨胀系数的钛铌合金及其制备方法

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CN112965355A (zh) 2021-06-15
EP3796102B1 (de) 2022-04-20
US11307535B2 (en) 2022-04-19
CN109960137A (zh) 2019-07-02
US20190196408A1 (en) 2019-06-27
US11640140B2 (en) 2023-05-02
JP6770049B2 (ja) 2020-10-14
CN109960137B (zh) 2021-04-09
JP2019113533A (ja) 2019-07-11
US20220163923A1 (en) 2022-05-26
EP3796102A1 (de) 2021-03-24
EP3502787B1 (de) 2020-11-18

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