EP3226083A1 - Rohwerk eines uhrwerks - Google Patents

Rohwerk eines uhrwerks Download PDF

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Publication number
EP3226083A1
EP3226083A1 EP17164653.2A EP17164653A EP3226083A1 EP 3226083 A1 EP3226083 A1 EP 3226083A1 EP 17164653 A EP17164653 A EP 17164653A EP 3226083 A1 EP3226083 A1 EP 3226083A1
Authority
EP
European Patent Office
Prior art keywords
glass
ceramic
blank
blank according
watch movement
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Withdrawn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
EP17164653.2A
Other languages
English (en)
French (fr)
Inventor
Nicolas Yoakim
Gregory Bruttin
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.)
Richemont International SA
Original Assignee
Richemont International 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 Richemont International SA filed Critical Richemont International SA
Publication of EP3226083A1 publication Critical patent/EP3226083A1/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Withdrawn legal-status Critical Current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
    • G04B29/00—Frameworks
    • G04B29/02—Plates; Bridges; Cocks
    • G04B29/027—Materials and manufacturing
    • 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
    • G04B13/00—Gearwork
    • 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
    • G04B15/00—Escapements
    • G04B15/14—Component parts or constructional details, e.g. construction of the lever or the escape wheel
    • 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
    • G04B17/28—Compensation of mechanisms for stabilising frequency for the effect of imbalance of the weights, e.g. tourbillon
    • G04B17/285—Tourbillons or carrousels
    • 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
    • G04B19/00—Indicating the time by visual means
    • 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
    • G04B21/00—Indicating the time by acoustic means
    • G04B21/02—Regular striking mechanisms giving the full hour, half hour or quarter hour
    • G04B21/06—Details of striking mechanisms, e.g. hammer, fan governor
    • 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
    • G04B23/00—Arrangements producing acoustic signals at preselected times
    • G04B23/02—Alarm clocks
    • G04B23/06—Alarm clocks adjustable for several preselected times with automatic stopping of the signal
    • 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
    • G04B5/00—Automatic winding up
    • G04B5/02—Automatic winding up by self-winding caused by the movement of the watch
    • G04B5/16—Construction of the weights

Definitions

  • the present invention relates to a watch movement blank, that is to say a structural component of a fixed or movable frame of a watch movement such as a plate, a bridge or a tourbillon cage element.
  • watch movement blanks are made of metal or metal alloy. They are often thin and / or perforated, even skeleton type to reveal from the top or bottom of the watch most of the moving parts of the movement.
  • the blanks undergo significant stresses in their thin parts and, where appropriate, in the skeleton arms, stresses that are specific to the metals and metal alloys commonly used to make the blanks. This can result in deformations of the blank, which can in particular cause assembly difficulties or hinder the stroke of moving components once the blank mounted in the movement. It is known to apply a draft relaxation heat treatment to alleviate this problem. But this on the one hand does not completely eliminate the risk of deformation and on the other hand complicates the manufacture. In addition, the heat treatment can degrade certain properties of the material.
  • An object of the invention is to overcome at least in part these disadvantages.
  • the subject of the invention is a watch movement blank according to claim 1.
  • the blank according to the invention comprises a glass-ceramic, said glass-ceramic comprising a crystalline phase representing at least 50% by volume of said glass-ceramic, the remainder of the glass-ceramic being a vitreous matrix, said crystalline phase being at least 50% of mica type.
  • the expression "glass-ceramic with a mica structure" is used to designate such a glass-ceramic.
  • the watch movement blank according to the invention is typically obtained by at least one mechanical machining step by removing material from a substrate of said glass-ceramic.
  • at least 50% of these machining steps are machining mechanical machining steps, chosen for example from the following conventional mechanical machining techniques: turning, milling, polishing, satin finishing, mechanical etching, drilling or cutting.
  • Said glass-ceramic preferably has a density of less than 3 g / cm 3 .
  • the glass ceramic of the watch movement blank according to the invention may comprise at least two zones with different shades. These differences in hue can be obtained under the effect of a targeted exposure to a laser beam.
  • the glass-ceramic of the blank according to the invention may comprise metal ions of one of the elements of the rare earth group, such as, for example, europium or erbium ions, of one of the elements of the group of metals. transition, for example yttrium ions or one of the elements of the group of poor metals, for example bismuth ions.
  • the glass-ceramic of the watch movement blank according to the invention may comprise at least two zones with different luminescences. These differences in luminescence can be obtained under the effect of a targeted exposure to a laser beam or by localized ion implantation of at least one of said metal ions in charged form.
  • the watch movement blank according to the invention may also comprise a coating covering at least a portion of the surface of the glass-ceramic.
  • Said coating may be made of a material chosen from a paint, a lacquer, a material having a higher photoluminescence than said glass-ceramic, a metal-based material, and / or any other material for providing optical contrast with said glass-ceramic, in particular for displaying information.
  • the coating makes it possible to perform another function, advantageously an assembly function.
  • the coating may be affixed to the surfaces intended to receive a counterpart, the coating may for example make it possible to reinforce the surface in order to promote the driving of a third component such as a stone or a screw or to make the surface capable of being assembled to another component by brazing, welding or any other equivalent process.
  • at least one material may be applied between the substrate and the coating.
  • the metal-based material constituting said coating may have a density greater than the density of the glass-ceramic, may be chosen from the family of precious metals and / or from the family of transition metals, and / or may comprise from at least one element selected from a nitride, an oxide and / or a carbide of a metal element. It may be in particular metal alloys.
  • the rough watch movement according to the invention is for example a plate, a bridge or a part of a tourbillon cage. It can be openwork, or even form a skeleton type structure. More specifically, at least 10%, preferably at least 20%, preferably at least 30%, preferably at least 50%, preferably at least 70%, of the surface delimited by the external contour of the blank in order to The face ( see figure) is occupied by through openings whose particular function is to let the light through the blank to make visible one or more moving parts of the movement.
  • the watch movement blank according to the invention makes it possible to dispense with the relaxation heat treatment operations used for the production of metal blanks.
  • a watch movement blank 1 comprises a glass-ceramic comprising a crystalline phase representing at least 50% by volume of said glass-ceramic, the remainder of the glass-ceramic being a vitreous matrix, said crystalline phase being at least 50% of mica type. .
  • the crystalline phases of the mica type are at least partly in the form of lamellae. These last ones favor the machinability of the glass-ceramic with mica structure.
  • Said glass-ceramic contains silicon dioxide and other elements, partly oxides, a non-limiting composition of the material further comprising the following elements: MgO, Al 2 O 3 , K 2 O, B 2 O 3 and F. may be completed, partially or completely replaced by other elements, chosen in particular from magnesium fluoride, strontium oxide, iron oxides, chromium or other metal elements. Certain elements such as copper or gold can advantageously modify the colors of the glass-ceramic.
  • glass-ceramics mica structure do not require sintering step or baking during their shaping to obtain the blank according to the invention, and have the advantage of being machined without special tools.
  • a rough watch movement according to the invention is produced by machining a glass-ceramic substrate with a mica structure. It is typically obtained by at least one mechanical machining step, by removal of material. Preferably, at least 50% of the roughing machining steps are machining mechanical machining steps chosen for example from among the following conventional mechanical machining techniques: turning, milling, polishing, satin finishing, mechanical etching , drilling or cutting.
  • mechanical machining is meant a machining in which the removal of material is obtained by solid-solid contact between the machining instrument and the substrate to be machined.
  • the machining of the blank in a mica-structure glass-ceramic substrate can also be carried out by alternative methods, such as, for example, water-jet machining or laser-guided machining. water jet.
  • a glass-ceramic mica structure as defined above typically has a density of less than 3g / cm 3 , which makes it advantageous for the production of movable elements, their inertia then being greatly reduced.
  • the blank 1 as illustrated in the figure is a platen.
  • the watch movement blank 1 according to the invention could for example be a bridge or an element of a tourbillon cage.
  • the rough watch movement 1 according to the invention can undergo various treatments and take various forms.
  • the perforated parts can in particular give a skeleton effect. This represents both a gain in terms of weight and a particularly interesting aesthetic effect.
  • An advantage of using a glass ceramic mica structure with respect to metals traditionally used in watchmaking movement blanks comes from the absence or reduction of internal stresses after machining, which allows, particularly in the case highly openwork parts such as blanks called skeletons, to ensure high geometries and tolerances during assemblies, overcoming problems of warping or other encountered in thin metal structures.
  • the mica-structure glass-ceramic used comprises certain compounds such as, for example, metal oxides, such as zirconium oxide and / or aluminum oxide
  • its reflectance may be modified, in particular under the effect of laser exposure or irradiation at specific frequency, duration, and wavelength pulsations.
  • it is possible to change the shade of the material usually in shades ranging from white to black, through intermediate gray, selectively and localized. This can for example be used to write indications on the blank 1.
  • the presence of certain other metal elements in the glass-ceramic mica structure used such as copper or gold in addition to varying the hue of the entire ceramic glass in certain color spectra, including decorative purposes, for example to match the blank to other components of the watch movement.
  • the glass-ceramic mica structure of the watch movement blank 1 may comprise metal ions that can be introduced into the glass-ceramic by any suitable technique, including doping or ion implantation.
  • the luminescence or other property of said glass-ceramic mica structure may be modified, especially under the effect of a laser irradiation with specific frequency, duration and wavelength pulsations. Such irradiation makes it possible to obtain luminescence by excitation of photons and thus to modify the luminescence properties of the exposed zone. This can for example be used to write indications on the blank 1.
  • the modified property is a mechanical property, such as its surface hardness and / or its tribological properties.
  • Another possibility is to introduce these ions previously loaded with laser ion implantation.
  • a surface coating can be made on at least a portion of the glass-ceramic surface mica structure of the watch movement blank 1 according to the invention, for example to represent indications.
  • Such a surface coating may consist of a metallization of a portion of the glass-ceramic surface of the watch movement blank 1 according to the invention.
  • Said metallization can be carried out by various known methods, for example, but without being limiting, by PVD or CVD. It can be used to promote the bonding of a glass-ceramic surface with a mica structure of the watch movement blank 1 to another metallic or metallized element of the watch movement blank 1 or of the movement, by soldering, brazing, pressing or by any other method providing the same bonding function between two metallic or metallized elements.
  • the material of the surface coating is typically selected from materials comprising at least one metal element, said metal element having a density greater than the density of the glass-ceramic and / or being selected from the family of precious metals.
  • a surface coating with a metal or metalloid may typically be completed with a step leading to an oxide, nitride and / or carbide thereof. This may be advantageous for example to reinforce a surface of the blank 1 subjected to high friction and / or wear stress, where the sliding must be maximized or a surface to cooperate with another surface without liquid lubrication or with special lubrication conditions. Such surfaces can cooperate with the pivots of the moving parts of the movement.
  • the rough watch movement according to the invention is advantageously subjected to finish or decoration treatments including in particular steps such as chamfering or engraving.
  • the watch movement blank according to the invention has many advantages. It is particularly easily achievable, mainly by mechanical machining in a glass ceramic mica structure, without the need for sintering or baking operations and without anisotropic removal of the material. It has a relatively low density to reduce its inertia. It is also possible, depending on the composition of the glass ceramic mica structure used, to locally modify, under the effect of a laser for example, the luminescence and / or the shade of the glass-ceramic structure mica, typically to show indications or patterns on its surface.
  • the watch movement blank according to the invention can also be perforated for example in the form of a skeleton type structure, while ensuring high geometries and tolerances during assemblies, overcoming the warping or other problems encountered in thin metal structures. In addition, it may be coated with a layer of a second material, typically metallic or photoluminescent for purposes such as improving the tribological properties or assembly with other components or for decorative purposes.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Metallurgy (AREA)
  • Acoustics & Sound (AREA)
  • Glass Compositions (AREA)
  • Surface Treatment Of Glass (AREA)
  • Laser Beam Processing (AREA)
EP17164653.2A 2016-04-01 2017-04-03 Rohwerk eines uhrwerks Withdrawn EP3226083A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH4312016 2016-04-01

Publications (1)

Publication Number Publication Date
EP3226083A1 true EP3226083A1 (de) 2017-10-04

Family

ID=55649970

Family Applications (3)

Application Number Title Priority Date Filing Date
EP17164652.4A Active EP3226082B1 (de) 2016-04-01 2017-04-03 Komponente eines uhrwerks
EP17164653.2A Withdrawn EP3226083A1 (de) 2016-04-01 2017-04-03 Rohwerk eines uhrwerks
EP17164654.0A Active EP3232276B1 (de) 2016-04-01 2017-04-03 Komponente eines uhrwerks

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP17164652.4A Active EP3226082B1 (de) 2016-04-01 2017-04-03 Komponente eines uhrwerks

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP17164654.0A Active EP3232276B1 (de) 2016-04-01 2017-04-03 Komponente eines uhrwerks

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109270818A (zh) * 2018-11-07 2019-01-25 精时拓飞（深圳）科技有限公司 一种微型机械的自动供能模块

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1398315A (en) * 1972-08-15 1975-06-18 Dassortiments Reunies Fab Method for manufacturing dials for watches and dials for watches manufactured according to said method
DE102006059274A1 (de) * 2006-12-13 2008-06-26 Stein, Ralf Verfahren zur Herstellung eines Bauteils für das Werk einer mechanischen Uhr
WO2016033253A1 (en) * 2014-08-27 2016-03-03 Apple Inc. Sapphire cover for electronic devices

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1398315A (en) * 1972-08-15 1975-06-18 Dassortiments Reunies Fab Method for manufacturing dials for watches and dials for watches manufactured according to said method
DE102006059274A1 (de) * 2006-12-13 2008-06-26 Stein, Ralf Verfahren zur Herstellung eines Bauteils für das Werk einer mechanischen Uhr
WO2016033253A1 (en) * 2014-08-27 2016-03-03 Apple Inc. Sapphire cover for electronic devices

Also Published As

Publication number Publication date
EP3226082B1 (de) 2020-02-26
EP3232276B1 (de) 2020-08-26
EP3232276A1 (de) 2017-10-18
EP3226082A1 (de) 2017-10-04

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