EP3771948A1 - Dial for a timepiece - Google Patents

Dial for a timepiece Download PDF

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Publication number
EP3771948A1
EP3771948A1 EP19189456.7A EP19189456A EP3771948A1 EP 3771948 A1 EP3771948 A1 EP 3771948A1 EP 19189456 A EP19189456 A EP 19189456A EP 3771948 A1 EP3771948 A1 EP 3771948A1
Authority
EP
European Patent Office
Prior art keywords
dial
relief
level
elementary
parts
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.)
Pending
Application number
EP19189456.7A
Other languages
German (de)
French (fr)
Inventor
M. Frédéric JEANRENAUD
M. Gregory KISSLING
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.)
Omega SA
Original Assignee
Omega 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 Omega SA filed Critical Omega SA
Priority to EP19189456.7A priority Critical patent/EP3771948A1/en
Priority to US16/902,474 priority patent/US11906932B2/en
Priority to JP2020115398A priority patent/JP7063944B2/en
Priority to CN202010751039.2A priority patent/CN112305898B/en
Publication of EP3771948A1 publication Critical patent/EP3771948A1/en
Priority to US18/340,599 priority patent/US20230367266A1/en
Pending 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
    • G04B19/00—Indicating the time by visual means
    • G04B19/06—Dials
    • G04B19/065—Dials with several parts
    • 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
    • G04D3/0043—Watchmakers' or watch-repairers' machines or tools for working materials for mechanical working other than with a lathe for components of the time-indicating mechanisms
    • G04D3/0048—Watchmakers' or watch-repairers' machines or tools for working materials for mechanical working other than with a lathe for components of the time-indicating mechanisms for dials
    • 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
    • G04B19/06—Dials
    • 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
    • G04B19/06—Dials
    • G04B19/08—Geometrical arrangement of the graduations
    • 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
    • G04B19/06—Dials
    • G04B19/10—Ornamental shape of the graduations or the surface of the dial; Attachment of the graduations to the dial
    • 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
    • G04B19/06—Dials
    • G04B19/12—Selection of materials for dials or graduations markings
    • 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
    • G04B47/00—Time-pieces combined with other articles which do not interfere with the running or the time-keeping of the time-piece
    • G04B47/04—Time-pieces combined with other articles which do not interfere with the running or the time-keeping of the time-piece with attached ornaments or amusement apparatus
    • G04B47/042—Fastening of jewels and the like
    • 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
    • G04D3/0069—Watchmakers' or watch-repairers' machines or tools for working materials for working with non-mechanical means, e.g. chemical, electrochemical, metallising, vapourising; with electron beams, laser beams
    • 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
    • G04D3/0074—Watchmakers' or watch-repairers' machines or tools for working materials for treatment of the material, e.g. surface treatment
    • G04D3/0092—Watchmakers' or watch-repairers' machines or tools for working materials for treatment of the material, e.g. surface treatment for components of the time-indicating mechanism, e.g. dials
    • 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
    • G04D3/02—Lathes, with one or more supports; Burnishing machines, with one or more supports
    • G04D3/0227—Lathes, with one or more supports; Burnishing machines, with one or more supports for the manufacture of special components for clockworks
    • G04D3/0272—Lathes, with one or more supports; Burnishing machines, with one or more supports for the manufacture of special components for clockworks for components of the time-indicating mechanism, e.g. dials

Definitions

  • the present invention relates to a dial for a timepiece, in particular for a wristwatch, and more particularly to such a polished and / or enamelled dial, the visible surface of which has a relief.
  • dials which include a relief, formed for example by a conical or pyramidal part on the outside of a flat and circular part.
  • Dials of this type are generally made by machining from the base material of the dial such as stone or ceramic, to obtain the three-dimensional shape, followed by polishing and / or enamelling steps.
  • polishing and enamelling steps A problem which is often encountered is that these polishing and enamelling processes round off the ridges between the surfaces of the relief after machining, which is detrimental to the aesthetic appearance of the watch.
  • the present invention aims to provide a method of manufacturing a dial for a timepiece which overcomes the problems identified above.
  • the invention makes it possible to produce reliefs with Sharp edges at the junctions between the different parts forming the dial.
  • the invention also relates to a dial for a timepiece, preferably for a watch, the dial being provided with a relief which is produced as an assembly of parts at different levels, juxtaposed on a base, so that the relief is formed by the upper surfaces of the parts.
  • FIG. 1 An illustration of a dial 1 as known in the state of the art is shown in figure 1 .
  • the dial comprises a part 9 in one piece comprising a flat lower surface 2, attached for example by gluing to a base or substrate 3 intended to be attached above a watch movement for example by means of dial feet. (not shown).
  • the upper surface has a relief, comprising a flat central part 4 which is located at a first level A1 measured from a horizontal reference plane which is here the plane of the base 3, and twelve surfaces 5 inclined from the first level A1 to a second level A2 outside dial 1, the second level A2 being lower than the first level A1.
  • the method of manufacturing this dial as it is currently known consists in machining a cylindrical part made of metal, stone or ceramic for example.
  • the inclined surfaces 5 as well as the central surface 4 are polished.
  • the edges between the surfaces of the relief are rounded and ill-defined, adversely affecting the aesthetics of the dial.
  • the method may also include a step of enamelling the upper surface of the relief, this step is particularly applicable when the dial is made of metal.
  • the enamelling operation will have the effect of rounding the edges.
  • a set of elementary parts manufactured according to one embodiment of the method of the invention are shown in figure 2 : all of these elementary parts comprises a parallelepiped 10 having a thickness A1 and twelve straight lateral faces, as well as twelve identical parts 11 having a lateral face whose width corresponds to the width of the lateral faces of the parallelepiped 10.
  • the upper surface of the pieces 11 is inclined between the thicknesses A1 'and A2.
  • the thicknesses A1 and A1 ′ may be equal but preferably A1 ′ is slightly smaller or greater than A1, for example by a few tens of micrometers.
  • the manufacture of the elementary parts 10 and 11 can be carried out using machining techniques known per se, such as by grinding, laser ablation, machining assisted by ultrasound and / or laser cutting.
  • the upper surfaces 4 and 5 of the parts 10 and 11 are then subjected to a surface treatment to give the upper surfaces a determined aesthetic appearance, in this case a polishing, using techniques known in the state of the art, such as polishing by barrel, flat disc or fine grinding wheels.
  • the upper surfaces of the parts can be all or in part, alternately subjected to an enamelling step.
  • the part 9 in one piece used in the method of the state of the art illustrated in figure 1 is manufactured by machining according to a conventional process, polished, and then cut, for example by laser cutting, to obtain the elementary parts 10 and 11.
  • the elementary parts 10 and 11 obtained and whose upper surfaces 4 and 5 are polished and / or enamelled are then assembled edge to edge, by placing them on the base 3 of the watch, as illustrated in figures 3a to 3c .
  • the fixing of the elementary parts 10 and 11 on the base can be carried out by a method known per se, preferably by gluing or by a mechanical connection such as by rods, or by a combination of these methods.
  • the parallelepiped 10 is mounted first, followed by the side pieces 11 which are juxtaposed to the side faces of the parallelepiped 10, and to the faces of two adjacent pieces 11.
  • the polished and / or enamelled parts 10 and 11 are produced with strict dimensional tolerances, so that a contact without interstice is made for all the adjacent interfaces of the adjacent elementary parts.
  • this method makes it possible to produce a dial 1 in relief with sharp edges 12, each of these edges 12 being defined by the junction between the top lines 12a, 12b of two adjacent elementary parts 10, 11.
  • the figure 4 shows another example of a dial manufactured according to the method of the invention, and the relief of which is produced by assembling two elementary parts: a cylindrical part 20 having a thickness A1 and a conical part 21 which produces a relief between A1 'and A2, A2 being less than A1' (the relationship between A1 and A1 'is the same as that described for the embodiment shown in figures 2 and 3a-3c ).
  • the two parts 20 and 21 are manufactured separately.
  • the upper surfaces 4 'and 5' are polished and / or enameled and then cut into their final shape.
  • the parts 20 and 21 are then assembled on the base 3.
  • the figure 5 shows an example of the dial with twelve inclined surfaces, i.e. the same dial which is shown in figures 1 to 3 , but produced by an assembly of two parts 10 and 31: the parallelepiped 10 and a ring 31.
  • the ring 31 comprising the twelve surfaces 5 inclined between A1 'and A2, is produced as a single piece, preferably by laser cutting the piece 9 shown in figure 1 .
  • the upper surfaces 4 and 5 of parts 10 and 31 are then polished and / enamelled, then cut into their final shape before being assembled on base 3.
  • the base 3 comprises several levels, and the thickness of the parts which define the relief takes into account the height of these levels.
  • the figure 6 shows a dial assembled according to the method of the invention and which has the same external appearance as the dial of figures 2 and 3a-3c , but in which the parallelepiped 10 is mounted on a central raised part of the base 3.
  • the level of the central part of the base is higher than the level of the outer part 33 of the base, on which the parts 11 are mounted .
  • This dial comprises four parts 40 to 43 mounted on the base 3, which produce a relief between a thickness A1 on the outside of the dial and a thickness A2 less than A1 at the center of the dial.
  • the invention is not limited to the embodiments described above.
  • the relief need not necessarily extend over the entire surface of the dial.
  • An example of a local relief produced by the method of the invention is illustrated on figure 8 .
  • the relief comprises a central cylindrical part 50 surrounded by a conical part 51, the parts being integrated in a cylindrical hole 53 provided in a flat dial 52.
  • the assembly of the relief is therefore carried out by manufacturing the parts 50, 51 and 52, followed by by polishing and / or enameling the parts, cutting them into their final shape and then by assembling the parts on the base 3.

Abstract

Cadran d'une pièce d'horlogerie, de préférence une montre, le cadran étant pourvu d'un relief qui est réalisé comme un assemblage de pièces (10, 11 ;20,21 ;30,31 ;41,42,43,44 ;50,51,52) à niveaux différents, juxtaposés sur une base (3), de sorte que le relief est formé par les surfaces supérieures (4,5) des pièces. Procédé de fabrication dudit cadran. Selon le procédé, plusieurs pièces séparées sont fabriquées, ensuite soumises à une étape de polissage et/ou éventuellement une étape d'émaillage des surfaces supérieures des pièces. Les pièces sont ensuite découpées selon un contour déterminé puis assemblées bord à bord sur une base, de manière à créer le relief.

Figure imgaf001
Dial of a timepiece, preferably a watch, the dial being provided with a relief which is produced as an assembly of parts (10, 11; 20,21; 30,31; 41,42,43,44 ; 50,51,52) at different levels, juxtaposed on a base (3), so that the relief is formed by the upper surfaces (4,5) of the parts. Method of manufacturing said dial. According to the process, several separate parts are manufactured, then subjected to a polishing step and / or optionally a step of enamelling the upper surfaces of the parts. The pieces are then cut according to a determined outline and then assembled edge to edge on a base, so as to create the relief.
Figure imgaf001

Description

Domaine techniqueTechnical area

La présente invention se rapporte à un cadran pour une pièce d'horlogerie, notamment pour une montre-bracelet, et plus particulièrement à un tel cadran poli et/ou émaillé dont la surface visible comporte un relief.The present invention relates to a dial for a timepiece, in particular for a wristwatch, and more particularly to such a polished and / or enamelled dial, the visible surface of which has a relief.

État de la techniqueState of the art

Il est bien connu de fabriquer des cadrans qui comportent un relief, formé par exemple par une partie conique ou pyramidale à l'extérieur d'une partie plate et circulaire. Les cadrans de ce type sont généralement fabriqués par usinage dans le matériau de base du cadran tel que la pierre ou la céramique, pour obtenir la forme tridimensionnelle, suivi par des étapes de polissage et/ou d'émaillage. Un problème qui est souvent rencontré est que ces procédés de polissage et émaillage arrondissent les arêtes entre les surfaces du relief après l'usinage, ce qui nuit à l'aspect esthétique de la montre.It is well known to manufacture dials which include a relief, formed for example by a conical or pyramidal part on the outside of a flat and circular part. Dials of this type are generally made by machining from the base material of the dial such as stone or ceramic, to obtain the three-dimensional shape, followed by polishing and / or enamelling steps. A problem which is often encountered is that these polishing and enamelling processes round off the ridges between the surfaces of the relief after machining, which is detrimental to the aesthetic appearance of the watch.

Résumé de l'inventionSummary of the invention

La présente invention vise à fournir un procédé de fabrication d'un cadran pour pièce d'horlogerie qui pallie les problèmes identifiés ci-dessus.The present invention aims to provide a method of manufacturing a dial for a timepiece which overcomes the problems identified above.

A cet effet l'invention propose un procédé de fabrication d'un cadran pour une pièce d'horlogerie, le cadran comprenant un relief, selon lequel le relief est réalisé comme un assemblage de pièces à niveaux différents, juxtaposées sur une base, de sorte que le relief est formé par les surfaces supérieures des pièces, le procédé comprenant les étapes consistant à :

  1. a) fabriquer des pièces semi-finies par usinage,
  2. b) traiter lesdites surfaces supérieures des pièces après l'étape a) pour donner aux surfaces supérieures un aspect esthétique déterminé,
  3. c) découper lesdites pièces traitées selon un contour de géométrie déterminé,
  4. d) assembler les pièces obtenues après l'étape c), par juxtaposition des pièces sur la base.
To this end, the invention proposes a method of manufacturing a dial for a timepiece, the dial comprising a relief, according to which the relief is produced as an assembly of parts at different levels, juxtaposed on a base, so that the relief is formed by the upper surfaces of the parts, the method comprising the steps of:
  1. a) manufacture semi-finished parts by machining,
  2. b) treating said upper surfaces of the parts after step a) to give the upper surfaces a determined aesthetic appearance,
  3. c) cutting said treated parts according to a determined geometry contour,
  4. d) assembling the parts obtained after step c), by juxtaposing the parts on the base.

Par l'application des étapes traitement de surface notamment par des opérations de de polissages et/ou d'émaillage sur des pièces usinées et découpées avant l'assemblages desdites pièces sur une base ou substrat, l'invention permet de réaliser les reliefs avec des arêtes franches au niveau des jonctions entre les différentes pièces formant le cadran.By applying the surface treatment steps in particular by polishing and / or enamelling operations on machined and cut parts before assembling said parts on a base or substrate, the invention makes it possible to produce reliefs with Sharp edges at the junctions between the different parts forming the dial.

L'invention concerne également un cadran pour une pièce d'horlogerie, de préférence pour une montre, le cadran étant pourvu d'un relief qui est réalisé comme un assemblage de pièces à niveaux différents, juxtaposées sur une base, de sorte que le relief est formé par les surfaces supérieures des pièces.The invention also relates to a dial for a timepiece, preferably for a watch, the dial being provided with a relief which is produced as an assembly of parts at different levels, juxtaposed on a base, so that the relief is formed by the upper surfaces of the parts.

D'autres caractéristiques et avantages de la présente invention apparaîtront dans la description suivante de modes de réalisation préférés, présentés à titre d'exemple non limitatif en référence aux dessins annexésOther characteristics and advantages of the present invention will become apparent from the following description of preferred embodiments, presented by way of non-limiting example with reference to the accompanying drawings.

Brève description des figuresBrief description of the figures

  • La figure 1 représente un cadran d'une montre comportant un relief, tel qu'il est connu actuellement.The figure 1 represents a dial of a watch comprising a relief, as is currently known.
  • La figure 2a représente les pièces constitutives d'un cadran fabriqué selon la méthode de l'invention.The figure 2a represents the constituent parts of a dial manufactured according to the method of the invention.
  • Les figures 3a -3c représentent les étapes d'assemblage du cadran selon la méthode de l'invention.The figures 3a -3c represent the steps of assembling the dial according to the method of the invention.
  • La figure 4 représente un autre exemple d'un cadran fabriqué selon la méthode de l'invention.The figure 4 shows another example of a dial produced according to the method of the invention.
  • La figure 5 représente une forme d'exécution alternative pour fabriquer le cadran de la figure 3c.The figure 5 represents an alternative embodiment to manufacture the dial of the figure 3c .
  • La figure 6 représente un cadran fabriqué selon la méthode de l'invention comprenant une base à niveaux différents.The figure 6 shows a dial manufactured according to the method of the invention comprising a base at different levels.
  • La figure 7 représente un cadran fabriqué selon l'invention, comportant un relief négatif.The figure 7 shows a dial manufactured according to the invention, comprising a negative relief.
  • La figure 8 représente un cadran fabriqué selon l'invention, comprenant un relief local.The figure 8 shows a dial manufactured according to the invention, comprising a local relief.
Description détaillée de formes d'exécution de l'inventionDetailed description of embodiments of the invention

Une illustration d'un cadran 1 tel qu'il est connu dans l'état de la technique est représentée à la figure 1. Le cadran comporte une pièce 9 d'un seul tenant comportant une surface inférieure plane 2, attachée par exemple par collage à une base ou substrat 3 destiné à être rapporté au-dessus d'un mouvement de montre par exemple au moyen de pieds de cadran (non représentés). La surface supérieure comporte un relief, comprenant une partie centrale plate 4 qui se situe à un premier niveau A1 mesuré à partir d'un plan de référence horizontal qui est ici le plan de la base 3, et douze surfaces 5 inclinées à partir du premier niveau A1 vers un deuxième niveau A2 à l'extérieur du cadran 1, le deuxième niveau A2 étant inférieur au premier niveau A1. Le procédé de fabrication de ce cadran tel qu'il est connu actuellement consiste à usiner une pièce cylindrique en métal, en pierre ou en céramique par exemple. Après l'usinage, les surfaces inclinées 5 ainsi que la surface centrale 4 sont polies. Lors de l'opération de polissage les arêtes entre les surfaces du relief se trouvent arrondies et mal définies nuisant à l'esthétique du cadran. En fonction du matériau de la pièce 9, le procédé peut inclure également une étape d'émaillage de la surface supérieure du relief, cette étape est notamment applicable quand le cadran est fabriqué de métal. Là encore l'opération d'émaillage va avoir l'effet d'arrondir les arêtes.An illustration of a dial 1 as known in the state of the art is shown in figure 1 . The dial comprises a part 9 in one piece comprising a flat lower surface 2, attached for example by gluing to a base or substrate 3 intended to be attached above a watch movement for example by means of dial feet. (not shown). The upper surface has a relief, comprising a flat central part 4 which is located at a first level A1 measured from a horizontal reference plane which is here the plane of the base 3, and twelve surfaces 5 inclined from the first level A1 to a second level A2 outside dial 1, the second level A2 being lower than the first level A1. The method of manufacturing this dial as it is currently known consists in machining a cylindrical part made of metal, stone or ceramic for example. After machining, the inclined surfaces 5 as well as the central surface 4 are polished. During the polishing operation, the edges between the surfaces of the relief are rounded and ill-defined, adversely affecting the aesthetics of the dial. Depending on the material of the part 9, the method may also include a step of enamelling the upper surface of the relief, this step is particularly applicable when the dial is made of metal. Here again the enamelling operation will have the effect of rounding the edges.

Pour réaliser le même cadran par le procédé de l'invention, plusieurs pièces séparées sont d'abord fabriquées par usinage pour réaliser des pièces élémentaires semi-finies comportant une surface supérieure. Les surfaces supérieures des pièces élémentaires sont traitées pour conférer à ces surfaces élémentaires un aspect esthétique déterminé. Les surfaces supérieures de ces pièces élémentaires sont par exemple polies et/ou éventuellement émaillées. Ces surfaces supérieures peuvent également être soumises à des traitements de structuration pour former des décors tels que des côtes de Genève, du perlage, des côtes circulaires, du sablage, du satinage etc. Les pièces élémentaires ayant subies un traitement de leur surface supérieure sont ensuite découpées selon un contour présentant une géométrie déterminée, puis assemblées sur la base 3 par juxtaposition de préférence bord à bord.To produce the same dial by the method of the invention, several separate parts are first manufactured by machining to produce semi-finished elementary parts having a top surface. The upper surfaces of the elementary parts are treated to give these elementary surfaces a determined aesthetic appearance. Surfaces upper parts of these elementary parts are for example polished and / or possibly enamelled. These upper surfaces can also be subjected to structuring treatments to form decorations such as Côtes de Genève, perlage, circular ribs, sandblasting, satin finishing, etc. The elementary parts having undergone a treatment of their upper surface are then cut along a contour having a determined geometry, then assembled on the base 3 by juxtaposition, preferably edge to edge.

Un ensemble de pièces élémentaires fabriquées selon une forme d'exécution de la méthode de l'invention sont représentées à la figure 2 : l'ensemble de ces pièces élémentaires comprend un parallélépipède 10 ayant une épaisseur A1 et douze faces latérales droites, ainsi que douze pièces 11 identiques ayant une face latérale dont la largeur correspond à la largeur des faces latérales du parallélépipède 10. La surface supérieure des pièces 11 est inclinée entre les épaisseurs A1' et A2. Les épaisseurs A1 et A1' peuvent être égales mais de préférence A1' est légèrement inférieure ou supérieure à A1, par exemple par quelques dizaines de micromètres. La fabrication des pièces élémentaires 10 et 11 peut être réalisée en utilisant des techniques d'usinage connues en soi, tel que par meulage, laser d'ablation, l'usinage assisté par ultrasons et/ou le découpage laser. Les surfaces supérieures 4 et 5 des pièces 10 et 11 sont ensuite soumises à un traitement de surface pour donner aux surfaces supérieures un aspect esthétique déterminé, en l'occurrence un polissage, utilisant des techniques connues dans l'état de la technique, tel que le polissage par tonneau, par disque plan ou par meules fines.A set of elementary parts manufactured according to one embodiment of the method of the invention are shown in figure 2 : all of these elementary parts comprises a parallelepiped 10 having a thickness A1 and twelve straight lateral faces, as well as twelve identical parts 11 having a lateral face whose width corresponds to the width of the lateral faces of the parallelepiped 10. The upper surface of the pieces 11 is inclined between the thicknesses A1 'and A2. The thicknesses A1 and A1 ′ may be equal but preferably A1 ′ is slightly smaller or greater than A1, for example by a few tens of micrometers. The manufacture of the elementary parts 10 and 11 can be carried out using machining techniques known per se, such as by grinding, laser ablation, machining assisted by ultrasound and / or laser cutting. The upper surfaces 4 and 5 of the parts 10 and 11 are then subjected to a surface treatment to give the upper surfaces a determined aesthetic appearance, in this case a polishing, using techniques known in the state of the art, such as polishing by barrel, flat disc or fine grinding wheels.

Quand les pièces 10 et 11 sont en métal ou céramique, les surfaces supérieures des pièces peuvent être toutes ou en partie, alternativement soumises à une étape d'émaillage.When the parts 10 and 11 are made of metal or ceramic, the upper surfaces of the parts can be all or in part, alternately subjected to an enamelling step.

Selon une forme d'exécution, la pièce 9 d'un seul tenant utilisée dans le procédé l'état de technique illustrée à la figure 1 est fabriquée par usinage selon un procédé classique, polie, et puis découpée par exemple par découpage laser, pour obtenir les pièces élémentaires 10 et 11.According to one embodiment, the part 9 in one piece used in the method of the state of the art illustrated in figure 1 is manufactured by machining according to a conventional process, polished, and then cut, for example by laser cutting, to obtain the elementary parts 10 and 11.

Les pièces élémentaires 10 et 11 obtenues et dont les surfaces supérieures 4 et 5 sont polies et/ou émaillées sont alors assemblées bord à bord, en les plaçant sur la base 3 de la montre, tel qu'illustré aux figures 3a à 3c. La fixation des pièces élémentaires 10 et 11 sur la base peut être réalisée par un procédé connu en soi, de préférence par collage ou par une connexion mécanique telle que par des tiges, ou par une combinaison de ces méthodes.The elementary parts 10 and 11 obtained and whose upper surfaces 4 and 5 are polished and / or enamelled are then assembled edge to edge, by placing them on the base 3 of the watch, as illustrated in figures 3a to 3c . The fixing of the elementary parts 10 and 11 on the base can be carried out by a method known per se, preferably by gluing or by a mechanical connection such as by rods, or by a combination of these methods.

De préférence, le parallélépipède 10 est monté d'abord, suivi par les pièces latérales 11 qui sont juxtaposées aux faces latérales du parallélépipède 10, et aux faces de deux pièces 11 adjacentes. Les pièces 10 et 11 polies et/ou émaillées sont réalisées avec des tolérances dimensionnelles strictes, de sorte qu'un contact sans interstice est réalisé pour l'ensemble des interfaces adjacentes des pièces élémentaires contiguës. Ainsi, ce procédé permet de réaliser un cadran 1 en relief avec des arêtes franches 12, chacune de ces arêtes 12 étant définie par la jonction entre les lignes de sommet 12a, 12b de deux pièces élémentaires contiguës 10, 11.Preferably, the parallelepiped 10 is mounted first, followed by the side pieces 11 which are juxtaposed to the side faces of the parallelepiped 10, and to the faces of two adjacent pieces 11. The polished and / or enamelled parts 10 and 11 are produced with strict dimensional tolerances, so that a contact without interstice is made for all the adjacent interfaces of the adjacent elementary parts. Thus, this method makes it possible to produce a dial 1 in relief with sharp edges 12, each of these edges 12 being defined by the junction between the top lines 12a, 12b of two adjacent elementary parts 10, 11.

La figure 4 représente un autre exemple d'un cadran fabriqué selon le procédé de l'invention, et dont le relief est réalisé par l'assemblage de deux pièces élémentaires : une pièce cylindrique 20 ayant une épaisseur A1 et une pièce conique 21 qui réalise un relief entre A1' et A2, A2 étant inférieure à A1' (la relation entre A1 et A1' est la même que celle décrite pour la forme d'exécution représentée aux figures 2 et 3a-3c). Les deux pièces 20 et 21 sont fabriquées séparément. Les surfaces supérieures 4' et 5' sont polies et/ou émaillées puis découpées dans leur forme finale. Les pièces 20 et 21 sont ensuite assemblées sur la base 3.The figure 4 shows another example of a dial manufactured according to the method of the invention, and the relief of which is produced by assembling two elementary parts: a cylindrical part 20 having a thickness A1 and a conical part 21 which produces a relief between A1 'and A2, A2 being less than A1' (the relationship between A1 and A1 'is the same as that described for the embodiment shown in figures 2 and 3a-3c ). The two parts 20 and 21 are manufactured separately. The upper surfaces 4 'and 5' are polished and / or enameled and then cut into their final shape. The parts 20 and 21 are then assembled on the base 3.

La figure 5 représente un exemple du cadran à douze surfaces inclinées, i.e. le même cadran qui est représenté aux figures 1 à 3, mais réalisé par un assemblage de deux pièces 10 et 31 : le parallélépipède 10 et un anneau 31. L'anneau 31 comprenant les douze surfaces 5 inclinées entre A1' et A2, est réalisé comme une pièce d'un seul tenant, de préférence par découpage à laser de la pièce 9 représentée à la figure 1. Les surfaces supérieures 4 et 5 des pièces 10 et 31 sont ensuite polies et/ émaillées, puis découpées dans leur forme finale avant d'être assemblées sur la base 3.The figure 5 shows an example of the dial with twelve inclined surfaces, i.e. the same dial which is shown in figures 1 to 3 , but produced by an assembly of two parts 10 and 31: the parallelepiped 10 and a ring 31. The ring 31 comprising the twelve surfaces 5 inclined between A1 'and A2, is produced as a single piece, preferably by laser cutting the piece 9 shown in figure 1 . The upper surfaces 4 and 5 of parts 10 and 31 are then polished and / enamelled, then cut into their final shape before being assembled on base 3.

Selon une forme d'exécution, la base 3 comprend plusieurs niveaux, et l'épaisseur des pièces qui définissent le relief tient compte de la hauteur de ces niveaux. La figure 6 représente un cadran assemblé selon le procédé de l'invention et qui présente le même aspect extérieur que le cadran des figures 2 et 3a-3c, mais dans lequel le parallélépipède 10 est monté sur une partie surélevée centrale de la base 3. Le niveau de la partie centrale de la base est supérieur par rapport au niveau de la partie extérieure 33 de la base, sur lequel les pièces 11 sont montées.According to one embodiment, the base 3 comprises several levels, and the thickness of the parts which define the relief takes into account the height of these levels. The figure 6 shows a dial assembled according to the method of the invention and which has the same external appearance as the dial of figures 2 and 3a-3c , but in which the parallelepiped 10 is mounted on a central raised part of the base 3. The level of the central part of the base is higher than the level of the outer part 33 of the base, on which the parts 11 are mounted .

Il est possible également de réaliser un relief négatif par la méthode de l'invention. Un exemple est représenté à la figure 7. Ce cadran comporte quatre pièces 40 à 43 montées sur la base 3, qui réalisent un relief entre une épaisseur A1 à l'extérieur du cadran et une épaisseur A2 inférieure à A1 au centre du cadran.It is also possible to produce a negative relief by the method of the invention. An example is shown at figure 7 . This dial comprises four parts 40 to 43 mounted on the base 3, which produce a relief between a thickness A1 on the outside of the dial and a thickness A2 less than A1 at the center of the dial.

L'invention n'est pas limitée aux formes d'exécution décrites ci-dessus. Le relief ne doit pas forcément s'étendre sur la surface complète du cadran. Un exemple d'un relief local réalisé par la méthode de l'invention est illustré à la figure 8. Le relief comprend une pièce cylindrique centrale 50 entourée par une pièce conique 51, les pièces étant intégrées dans un trou cylindrique 53 pourvue dans un cadran plat 52. L'assemblage du relief est donc réalisé en fabriquant les pièces 50, 51 et 52, suivi par le polissage et/ ou l'émaillage des pièces, le découpage dans leur forme finale et ensuite par l'assemblage des pièces sur la base 3.The invention is not limited to the embodiments described above. The relief need not necessarily extend over the entire surface of the dial. An example of a local relief produced by the method of the invention is illustrated on figure 8 . The relief comprises a central cylindrical part 50 surrounded by a conical part 51, the parts being integrated in a cylindrical hole 53 provided in a flat dial 52. The assembly of the relief is therefore carried out by manufacturing the parts 50, 51 and 52, followed by by polishing and / or enameling the parts, cutting them into their final shape and then by assembling the parts on the base 3.

Claims (15)

Procédé de fabrication d'un cadran (1) pour une pièce d'horlogerie, le cadran comprenant un relief, selon lequel le relief est réalisé comme un assemblage de pièces élémentaires (10,11 ;20,21 ;30,31 ;41,42,43,44 ;50,51,52) à niveaux différents, juxtaposées sur une base (3), de sorte que le relief est formé par les surfaces supérieures (4,5) des pièces élémentaires, le procédé comprenant les étapes consistant à : a) fabriquer des pièces élémentaires semi-finies par usinage, b) traiter lesdites surfaces supérieures des pièces élémentaires après l'étape a) pour donner aux surfaces supérieures un aspect esthétique déterminé, c) découper lesdites pièces élémentaires traitées selon un contour de géométrie déterminé, d) assembler les pièces élémentaires obtenues après l'étape c), par juxtaposition des pièces élémentaires sur la base (3). Method of manufacturing a dial (1) for a timepiece, the dial comprising a relief, according to which the relief is produced as an assembly of elementary parts (10,11; 20,21; 30,31; 41, 42,43,44; 50,51,52) at different levels, juxtaposed on a base (3), so that the relief is formed by the upper surfaces (4,5) of the elementary parts, the method comprising the steps of at : a) manufacture semi-finished elementary parts by machining, b) treating said upper surfaces of the elementary parts after step a) to give the upper surfaces a determined aesthetic appearance, c) cutting said elementary parts processed according to a determined geometry contour, d) assembling the elementary parts obtained after step c), by juxtaposing the elementary parts on the base (3). Procédé selon la revendication 1, caractérisé en ce que étape b) est une étape de polissage, d'émaillage, ou de structuration de la surface pour former un décor.Process according to Claim 1, characterized in that step b) is a step of polishing, enamelling or structuring the surface to form a decoration. Procédé selon la revendication 1 ou 2, caractérisé en ce qu'à l'étape d) les pièces élémentaires sont juxtaposées bord à bord.Method according to Claim 1 or 2, characterized in that in step d) the elementary parts are juxtaposed edge to edge. Procédé selon l'une des revendications 1 à 4, caractérisé en ce que le relief s'étend sur la totalité de la surface du cadran.Method according to one of claims 1 to 4, characterized in that the relief extends over the entire surface of the dial. Procédé selon la revendication 4, caractérisé en ce que le relief est défini par une surface plane (4) central polygonale qui se situe à un premier niveau (A1) mesuré à partir d'un plan de référence horizontal, et une pluralité de surfaces planes (5) latérales inclinées, qui s'étendent d'un niveau (A1') essentiellement égal au premier niveau vers un deuxième niveau (A2) à l'extérieur du cadran, le deuxième niveau étant inférieure au premier niveau, le nombre de surfaces inclinées correspondant au nombre de côtés de la surface polygonale (4),
et en ce que : - une desdites pièces élémentaires est un parallélépipède (10) dont la surface supérieure forme la surface centrale polygonale (4), et qui comporte un nombre de faces latérales correspondant au nombre de côtés de la surface polygonale (4), - le parallélépipède (10) est monté centralement sur ladite base (3), - chacune des surfaces inclinées (5) est réalisée par le montage sur ladite base (3) de pièces élémentaires (11) qui sont juxtaposées aux faces latérales dudit parallélépipède (10). Method according to Claim 4, characterized in that the relief is defined by a central polygonal flat surface (4) which is located at a first level (A1) measured from a horizontal reference plane, and a plurality of flat surfaces (5) inclined sides, which extend from a level (A1 ') essentially equal to the first level to a second level (A2) outside the dial, the second level being lower than the first level, the number of inclined surfaces corresponding to the number of sides of the polygonal surface (4),
and in that : - one of said elementary parts is a parallelepiped (10) whose upper surface forms the polygonal central surface (4), and which comprises a number of lateral faces corresponding to the number of sides of the polygonal surface (4), - the parallelepiped (10) is mounted centrally on said base (3), - Each of the inclined surfaces (5) is produced by mounting on said base (3) elementary parts (11) which are juxtaposed with the side faces of said parallelepiped (10). Procédé selon la revendication 4, caractérisé en ce que le relief est défini par une surface plane (4) central polygonale qui se situe à un premier niveau (A1) mesuré à partir d'un plan de référence horizontal, et une pluralité de surfaces planes (5) latérales inclinées, qui s'étendent d'un niveau (A1') essentiellement égal au premier niveau vers un deuxième niveau (A2) à l'extérieur du cadran, le deuxième niveau étant inférieure au premier niveau, le nombre de surfaces inclinées correspondant au nombre de côtés de la surface polygonale (4), dans laquelle le relief est formé par deux pièces élémentaires dont : - la première pièce élémentaire est un parallélépipède (10) dont la surface supérieure forme la surface centrale polygonale (4), et qui comporte un nombre de faces latérales extérieures correspondant au nombre de côtés de la surface polygonale (4), - la deuxième pièce élémentaire est un anneau (31) dont la surface supérieure est formée par la pluralité de surfaces inclinées (5), et qui comporte un nombre de faces latérales intérieures correspondant au nombre de côtés de la surface polygonale (4) et en ce que : - le parallélépipède (10) est monté centralement sur ladite base (3), - les surfaces inclinées (5) sont réalisées par le montage sur ladite base (3) de la deuxième pièce élémentaire (31) juxtaposée à la première pièce élémentaire. Method according to Claim 4, characterized in that the relief is defined by a central polygonal flat surface (4) which is located at a first level (A1) measured from a horizontal reference plane, and a plurality of flat surfaces (5) inclined laterals, which extend from a level (A1 ') essentially equal to the first level to a second level (A2) outside the dial, the second level being lower than the first level, the number of surfaces inclined corresponding to the number of sides of the polygonal surface (4), in which the relief is formed by two elementary parts including: - the first elementary part is a parallelepiped (10) whose upper surface forms the polygonal central surface (4), and which has a number of outer side faces corresponding to the number of sides of the polygonal surface (4), - the second elementary part is a ring (31) whose upper surface is formed by the plurality of inclined surfaces (5), and which has a number of inner side faces corresponding to the number of sides of the polygonal surface (4) and in that : - the parallelepiped (10) is mounted centrally on said base (3), - The inclined surfaces (5) are produced by mounting on said base (3) the second elementary part (31) juxtaposed to the first elementary part. Procédé selon la revendication 4, caractérisé en ce que le relief est défini par une surface plane central circulaire qui se situe à un premier niveau (A1) mesuré à partir d'un plan de référence horizontal, et une surface conique, qui s'étend d'un niveau (A1') essentiellement égal au premier niveau vers un deuxième niveau (A2) à l'extérieur du cadran, le deuxième niveau étant inférieure au premier niveau, dans laquelle le relief est formé par deux pièces élémentaires dont : - la première pièce élémentaire est un cylindre (20) dont la surface supérieure forme la surface centrale circulaire, - la deuxième pièce élémentaire est un anneau (21) dont la surface supérieure est formée par ladite surface conique, et en ce que : - le cylindre (20) est monté centralement sur ladite base (3), - la surface conique est réalisée par le montage sur ladite base (3) de la deuxième pièce élémentaire (21) juxtaposée à la première pièce élémentaire (20). Method according to Claim 4, characterized in that the relief is defined by a circular central flat surface which is located at a first level (A1) measured from a horizontal reference plane, and a conical surface, which extends from a level (A1 ') essentially equal to the first level to a second level (A2) outside the dial, the second level being lower than the first level, in which the relief is formed by two elementary parts including: - the first elementary part is a cylinder (20) whose upper surface forms the circular central surface, - the second elementary part is a ring (21) whose upper surface is formed by said conical surface, and in that : - the cylinder (20) is mounted centrally on said base (3), - The conical surface is produced by mounting on said base (3) the second elementary part (21) juxtaposed with the first elementary part (20). Procédé selon l'une des revendications 1 à 3, dans laquelle le relief est un relief local (50,51) qui se situe sur une portion du cadran (1).Method according to one of claims 1 to 3, in which the relief is a local relief (50,51) which is located on a portion of the dial (1). Cadran (1) pour une pièce d'horlogerie, le cadran comprenant un relief, dans lequel le relief est réalisé comme un assemblage de pièces élémentaires (10,11 ;20,21 ;30,31 ;41,42,43,44 ;50,51,52) à niveaux différents, juxtaposées sur une base (3), de sorte que le relief est formé par les surfaces supérieures (4,5) des pièces élémentaires.Dial (1) for a timepiece, the dial comprising a relief, in which the relief is produced as an assembly of elementary parts (10,11; 20,21; 30,31; 41,42,43,44; 50,51,52) at different levels, juxtaposed on a base (3), so that the relief is formed by the upper surfaces (4,5) of the elementary parts. Cadran selon la revendication 9, dans lequel le relief s'étend sur la surface entière du cadran.Dial according to Claim 9, in which the relief extends over the entire surface of the dial. Cadran selon la revendication 9, dans lequel le relief est un relief local (50,51) qui se situe sur une portion du cadran.Dial according to Claim 9, in which the relief is a local relief (50,51) which is located on a portion of the dial. Cadran selon l'une des revendications 9 à 11, dans lequel le cadran comprend des reliefs avec des arêtes franches, chacune de ces arêtes étant définie par la jonction entre les lignes de sommet de deux pièces élémentaires contiguës.Dial according to one of Claims 9 to 11, in which the dial comprises reliefs with sharp edges, each of these edges being defined by the junction between the top lines of two contiguous elementary parts. Cadran selon l'une des revendications 9 à 12, dans lequel lesdites pièces formant le relief sont réalisées en un matériau ayant une dureté HV supérieure à 500, de préférence supérieure à 800 et plus préférablement supérieure à 1000.Dial according to one of claims 9 to 12, wherein said parts forming the relief are made of a material having an HV hardness greater than 500, preferably greater than 800 and more preferably greater than 1000. Cadran selon la revendication 13 dans lequel lesdites pièces sont réalisées en saphir, alumine, zircone ou pierres naturellesDial according to claim 13 wherein said parts are made of sapphire, alumina, zirconia or natural stones. Une pièce d'horlogerie comprenant un cadran selon l'une quelconque des revendications 9 à 14.A timepiece comprising a dial according to any one of claims 9 to 14.
EP19189456.7A 2019-07-31 2019-07-31 Dial for a timepiece Pending EP3771948A1 (en)

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EP19189456.7A EP3771948A1 (en) 2019-07-31 2019-07-31 Dial for a timepiece
US16/902,474 US11906932B2 (en) 2019-07-31 2020-06-16 Dial for timepieces
JP2020115398A JP7063944B2 (en) 2019-07-31 2020-07-03 Timekeeping dial
CN202010751039.2A CN112305898B (en) 2019-07-31 2020-07-30 Clock dial
US18/340,599 US20230367266A1 (en) 2019-07-31 2023-06-23 Dial for timepieces

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US20230367266A1 (en) 2023-11-16
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US11906932B2 (en) 2024-02-20
CN112305898A (en) 2021-02-02
CN112305898B (en) 2022-06-28

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