EP3559758B1 - Timepiece dial made of a light metal alloy material - Google Patents

Timepiece dial made of a light metal alloy material Download PDF

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Publication number
EP3559758B1
EP3559758B1 EP17811613.3A EP17811613A EP3559758B1 EP 3559758 B1 EP3559758 B1 EP 3559758B1 EP 17811613 A EP17811613 A EP 17811613A EP 3559758 B1 EP3559758 B1 EP 3559758B1
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EP
European Patent Office
Prior art keywords
alloy
dial
foot
manufacturing
assembly
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EP17811613.3A
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German (de)
French (fr)
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EP3559758A1 (en
Inventor
Philippe Barfuss
Frédéric Jeanrenaud
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Rubattel et Weyermann SA
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Rubattel et Weyermann SA
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Publication of EP3559758A1 publication Critical patent/EP3559758A1/en
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    • 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
    • G04B19/00—Indicating the time by visual means
    • G04B19/06—Dials
    • G04B19/14—Fastening the dials to the clock or watch plates
    • 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

Definitions

  • the invention relates to a method of manufacturing a one-piece watch dial assembly, the material of which is an aluminum alloy, a titanium alloy or a magnesium alloy.
  • Clockwork or scientific instrument dials have feet for fixing and/or positioning on a plate or in a movement.
  • these feet are made of copper, coated with a fine deposit of gold to prevent their oxidation and improve their electrical contact.
  • the dials are generally made of copper, brass, nickel silver or similar alloy, so the behavior during the different stages of the process is the same on the dial and the feet that it comprises.
  • the resistance welding process makes it possible to join these feet and dial, by subjecting them to an energy pulse in the direction of the foot, this energy locally melting the metal at the interface of the dial and the foot, at one end of the foot called the pivot, which has a defined diameter, often less than the diameter of the foot, over a defined height, and which constitutes a fusible element which ensures the connection with the dial.
  • copper alloy feet are not suitable for making dials made of certain light alloys, in particular aluminum alloys.
  • copper alloy feet dissolve during electrochemical conversion processes, such as anodization, anodic oxidation or the like, in baths or electrolytes comprising sulfuric or sulfonitric acid.
  • the document US3 803 832 A in the name of SHIMIZU describes a watch dial comprising a body formed from a flat aluminum plate and rivets forming rod elements made of aluminum material, and forming fasteners on a movement.
  • the head of each rod is shaped to fit into a recess formed on the rear surface of the body, and is integrally secured to the recess by means of ultrasonic welding.
  • a manufacturing method uses an ultrasonic welding machine to integrally join the head and the recess.
  • the document CH 332 878 A on behalf of RIHS describes a process for manufacturing a dial from a sheet by stamping, in particular for the formation of numerals in relief, and by cutting, following which the numerals in relief are rectified, the front plate is chemically polished from it applies rune anodic oxidation with at least one coloring product.
  • the document EP2400354 on behalf of The Swatch Group Research and Development Ltd describes a dial comprising a foot made of metallic material used to attach said dial to a timepiece.
  • the document CH343312 in the name of Beyeler and Cie describes a process for manufacturing a metal dial comprising studs on which dial feet are welded.
  • the invention proposes to attach feet in aluminum alloy, in titanium alloy or in magnesium alloy, on a bare dial flange in aluminum alloy, in titanium alloy or in magnesium alloy, to transform this bare dial into a dial assembly comprising feet rigidly secured to this flange, and exhibiting the same chemical behavior as it.
  • the invention relates to a method of manufacturing a one-piece watch dial assembly, the material of which is an aluminum alloy, a titanium alloy or a magnesium alloy according to claim 1.
  • a watch dial 1 whose material is a light alloy, comprising a flange 2 whose material is a first light alloy.
  • this dial 1 is flat, or substantially flat, or with a radius of curvature greater than 30 mm.
  • This flange 2 comprises, on a first side at least one display zone 3 visible by a user, and on a second side opposite the first side on the front and called the back at least one foot 4 for positioning and/or fixing the dial 1 in a clockwork 100.
  • This dial 1 is a dial whose components, in particular the feet 4, are removable.
  • the flange 2 comprises at least one receiving zone 5 complementary to an end zone 6 of at least one foot 4, which is a weldable foot 40, which is arranged to be welded or brazed with the flange 2 at the level of the interface between the reception zone 5 and the end zone 6.
  • the constituent material of such a weldable foot 40 is the first light alloy, or else a second light alloy which is weldable or brazable with the first light alloy.
  • At least one such reception zone 5 envelopes a respective end zone 6 relating to the assembly of the same weldable foot 40, or at least one end zone 6 envelopes a respective reception zone 5 relating to the assembly of the same weldable foot 40, or at least a pair formed by an end zone 6 and a complementary reception zone 5 comprises, in a first assembled state that is not welded or brazed, an internal thread cooperating with a thread.
  • At least one reception zone 5 comprises a profile arranged to cooperate in a complementary way in support with a complementary profile that comprises a respective end zone 6 relating to assembly of the same weldable foot 40.
  • At least one receiving zone 5 envelops a respective end zone 6 relating to the assembly of the same weldable foot 40.
  • At least one end zone 6 surrounds a respective reception zone 5 relating to the assembly of the same weldable foot 40.
  • At least one reception zone 5 is arranged to cooperate in plane support with a respective end zone 6 relating to the assembly of the same weldable foot 40.
  • At least one pair formed of an end zone 6 and a complementary reception zone 5 comprises, in a first assembled state that is not welded or brazed, an internal thread cooperating with a thread.
  • At least one receiving zone 5 is part of a groove or of a rib of revolution, in particular produced during machining of the flange 2 by turning, and the end zone 6 which is complementary to it is a part of a rib or groove of complementary revolution.
  • the first light alloy and the second light alloy are chosen from aluminum, titanium or magnesium alloys.
  • the first light alloy or/and the second light alloy are replaced by the assembly formed of a pure metal coated with its oxide layer developed in contact with the atmosphere, such as Al 2 O 3 for the aluminum, or TiO 2 for titanium.
  • the first light alloy and the second light alloy are two aluminum alloys.
  • These alloys are preferably chosen from among the most easily weldable aluminum alloys. More particularly and without limitation, they are chosen from aluminum alloys without structural hardening, families 1000 (without addition element) and more particularly 1050 O in the annealed state, 3000 (with addition of manganese) and more particularly the 3003 O in the annealed state, 5000 (with addition of magnesium) which welds well and is well suited to anodizing, and more particularly the 5086 O in the annealed state or even the hardened and stabilized 5083 H111.
  • the first light alloy is an aluminum alloy
  • the second light alloy is a titanium alloy, such as TiO 2 , TiAl 6 V 4 called TA6V, or similar.
  • the second light alloy is an aluminum alloy
  • the first light alloy is a titanium alloy, such as TiO 2 , TiAl 6 V 4 called TA6V, or similar.
  • the first light alloy is an aluminum alloy
  • the second light alloy is a magnesium alloy which welds well with aluminum, such as MgAl 6 Zn 3 called G-A6Z3, or MgAl g Zn says G-A9Z, or MgZn 5 Th 2 Zr, or MgZr.
  • MgAl 6 Zn 3 called G-A6Z3
  • MgAl g Zn says G-A9Z
  • MgZn 5 Th 2 Zr or MgZr.
  • a one-piece dial assembly 10 the material of which is a light alloy, comprising a bare dial 1, and which results from the transformation of this dial 1 by at least one welding or brazing operation which irreversibly secures those of the components which have been welded or brazed together, in particular the flange 2 and all or part of the feet 4.
  • the welded or brazed connection zone does not no longer includes a trace of the initial geometry of the end zones 6 and of the complementary reception zones 5 concerned by the welding or brazing operation.
  • the end zone 6 and the reception zone 5 are joined in an unremovable manner at the level of a welded connection. or brazed between the flange 2 and the weldable foot 40 concerned.
  • each pair formed by an end zone 6 and a complementary reception zone 5 the end zone 6 and the reception zone 5 are joined in an unremovable manner at the level of a welded connection or brazed between the flange 2 and the weldable foot 40 concerned.
  • the one-piece dial assembly 10 comprises an anodized surface layer, or a surface layer of chromic or sulfuric anodic oxidation, the corresponding surface treatment being carried out after the welding or brazing operation or operations.
  • the dial is produced in one plane, or substantially plane, or with a radius of curvature greater than 30 mm,
  • each weldable foot 40 is assembled irreversibly by welding or brazing to the flange 2.
  • an anodizing operation or chromic or sulfuric anodic oxidation, is carried out on the surface layer of the dial assembly 10.
  • the first light alloy and the second light alloy are chosen from among aluminum alloys, titanium alloys, or magnesium alloys.
  • the first light alloy and the second light alloy are chosen, which are two aluminum alloys.
  • the first light alloy and the second light alloy are chosen, which are two titanium alloys.
  • the first light alloy and the second light alloy are chosen, which are two magnesium alloys.
  • the first light alloy is chosen which is an aluminum alloy, and the second light alloy which is a titanium alloy, or vice versa.
  • first light alloy and of a second light alloy which are two aluminum alloys is advantageous for the application of an anodizing process.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Laser Beam Processing (AREA)
  • Adornments (AREA)
  • Arc Welding In General (AREA)

Description

Domaine de l'inventionField of the invention

L'invention concerne un procédé de fabrication d'un ensemble cadran monobloc d'horlogerie dont le matériau est un alliage d'aluminium, un alliage de titane ou un alliage de magnésium.The invention relates to a method of manufacturing a one-piece watch dial assembly, the material of which is an aluminum alloy, a titanium alloy or a magnesium alloy.

Arrière-plan de l'inventionBackground of the invention

Les cadrans d'horlogerie ou d'instruments scientifiques comportent des pieds de fixation et/ou de positionnement sur une platine ou dans un mouvement.Clockwork or scientific instrument dials have feet for fixing and/or positioning on a plate or in a movement.

Souvent ces pieds sont utiles pour le procédé de fabrication di cadran, pour l'accroche des supports ou encore pour la réalisation de dépôts dans des bains galvaniques, assurant la double fonction d'élément de maintien et de guide de courant.These feet are often useful for the dial manufacturing process, for attaching supports or for making deposits in galvanic baths, performing the dual function of holding element and current guide.

En général ces pieds sont en cuivre, revêtus d'un fin dépôt d'or pour éviter leur oxydation et améliorer leur contact électrique. Les cadrans sont généralement en alliage cuivreux, laiton, maillechort ou similaire, de ce fait le comportent lors des différentes étapes du procédé est le même sur le cadran et les pieds qu'il comporte.In general, these feet are made of copper, coated with a fine deposit of gold to prevent their oxidation and improve their electrical contact. The dials are generally made of copper, brass, nickel silver or similar alloy, so the behavior during the different stages of the process is the same on the dial and the feet that it comprises.

Le procédé de soudage par résistance permet de solidariser ces pieds et cadran, en les soumettant à une impulsion d'énergie selon la direction du pied, cette énergie faisant fondre localement le métal à l'interface du cadran et du pied, à une extrémité du pied qu'on appelle le pivot, qui est d'un diamètre défini, souvent inférieur au diamètre du pied, sur une hauteur définie, et qui constitue un élément fusible qui assure la liaison avec le cadran.The resistance welding process makes it possible to join these feet and dial, by subjecting them to an energy pulse in the direction of the foot, this energy locally melting the metal at the interface of the dial and the foot, at one end of the foot called the pivot, which has a defined diameter, often less than the diameter of the foot, over a defined height, and which constitutes a fusible element which ensures the connection with the dial.

Mais de tels pieds en alliage cuivreux ne sont pas adaptés à la confection de cadrans réalisés dans certains alliages légers, notamment des alliages d'aluminium. En effet des pieds en alliage cuivreux se dissolvent lors des procédés de conversion électrochimique, tels qu'anodisation, oxydation anodique ou similaire, dans des bains ou des électrolytes comportant de l'acide sulfurique ou sulfonitrique.But such copper alloy feet are not suitable for making dials made of certain light alloys, in particular aluminum alloys. In fact, copper alloy feet dissolve during electrochemical conversion processes, such as anodization, anodic oxidation or the like, in baths or electrolytes comprising sulfuric or sulfonitric acid.

La réalisation de pieds dans un matériau présentant le même comportement que le matériau du cadran est donc souhaitable. Une élaboration monobloc des pieds avec le flasque du cadran est coûteuse dans un usinage par fraisage, ou difficilement réalisable par emboutissage.It is therefore desirable to produce feet in a material exhibiting the same behavior as the material of the dial. A one-piece production of the feet with the flange of the dial is costly in machining by milling, or difficult to achieve by stamping.

Pour cette raison il n'est pas rare de voir des cadrans en alliage léger comportant un flasque subissant tous les traitements galvaniques, sur lequel sont ensuite rapportés des pieds en alliage cuivreux. Ou encore des cadrans dépourvus de pieds, fixés par des ailettes sur le mouvement.For this reason it is not uncommon to see dials in light alloy comprising a flange undergoing all the galvanic treatments, on which are then added copper alloy feet. Or even dials without feet, fixed by fins on the movement.

Le document US3 803 832 A au nom de SHIMIZU décrit un cadran de montre comprenant un corps formé d'une plaque plane d'aluminium et de rivets formant des éléments de tige en matériau d'aluminium, et formant des fixations sur un mouvement. La tête de chaque de tige est formée de manière à s'insérer dans un évidement formé sur la surface arrière du corps, et est intégralement fixée à l'évidement au moyen d'un soudage par ultrasons. Un procédé de fabrication met en oeuvre une machine de soudage par ultrasons, pour joindre d'un seul tenant la tête et l'évidement.The document US3 803 832 A in the name of SHIMIZU describes a watch dial comprising a body formed from a flat aluminum plate and rivets forming rod elements made of aluminum material, and forming fasteners on a movement. The head of each rod is shaped to fit into a recess formed on the rear surface of the body, and is integrally secured to the recess by means of ultrasonic welding. A manufacturing method uses an ultrasonic welding machine to integrally join the head and the recess.

Le document CH 332 878 A au nom de RIHS décrit un procédé de fabrication d'un cadran issu d'une feuille par étampage, notamment pour la formation de chiffres en relief, et par découpe, suite à quoi on rectifie les chiffres en relief, on polit chimiquement la plaque avant de lui applique rune oxydation anodique avec au moins un produit colorant.The document CH 332 878 A on behalf of RIHS describes a process for manufacturing a dial from a sheet by stamping, in particular for the formation of numerals in relief, and by cutting, following which the numerals in relief are rectified, the front plate is chemically polished from it applies rune anodic oxidation with at least one coloring product.

Le document EP2400354 au nom de The Swatch Group Research and Development Ltd décrit un cadran comprenant un pied réalisé en matériau métallique utilisé pour fixer ledit cadran à une pièce d'horlogerie.The document EP2400354 on behalf of The Swatch Group Research and Development Ltd describes a dial comprising a foot made of metallic material used to attach said dial to a timepiece.

Le document CH343312 au nom de Beyeler and Cie décrit un procédé de fabrication d'un cadran en métal comprenant des tétons sur lesquels sont soudés des pieds de cadran.The document CH343312 in the name of Beyeler and Cie describes a process for manufacturing a metal dial comprising studs on which dial feet are welded.

Résumé de l'inventionSummary of the invention

L'invention se propose de rapporter des pieds en alliage d'aluminium, en alliage de titane ou en alliage de magnésium, sur un flasque de cadran nu en alliage d'aluminium, en alliage de titane ou en alliage de magnésium, pour transformer ce cadran nu en un ensemble cadran comportant des pieds rigidement solidarisés avec ce flasque, et présentant le même comportement chimique que lui.The invention proposes to attach feet in aluminum alloy, in titanium alloy or in magnesium alloy, on a bare dial flange in aluminum alloy, in titanium alloy or in magnesium alloy, to transform this bare dial into a dial assembly comprising feet rigidly secured to this flange, and exhibiting the same chemical behavior as it.

A cet effet, l'invention concerne procédé de fabrication d'un ensemble cadran monobloc d'horlogerie dont le matériau est un alliage d'aluminium, un alliage de titane ou un alliage de magnésium selon la revendication 1.To this end, the invention relates to a method of manufacturing a one-piece watch dial assembly, the material of which is an aluminum alloy, a titanium alloy or a magnesium alloy according to claim 1.

Description sommaire des dessinsBrief description of the drawings

D'autres caractéristiques et avantages de l'invention apparaîtront à la lecture de la description détaillée qui va suivre, en référence aux dessins annexés, où :

  • la figure 1 représente, de façon schématisée, et en coupe, un cadran nu assemblé mais non soudé ni brasé, comportant un flasque avec, à l'opposé d'une surface supérieure d'affichage, une surface inférieure sur laquelle sont présentés des pieds destinés à être soudés ou brasés sur ce flasque;
  • la figure 2 représente, de façon schématisée, et en coupe, un détail d'un tel cadran nu où la jonction entre le pied et le flasque est une surface plane ;
  • la figure 3 représente, de façon schématisée, et en coupe, un détail d'un tel cadran nu où la jonction entre le pied et le flasque est un emboîtement cylindrique, le pied pénétrant dans un alésage du flasque;
  • la figure 4 représente, de façon schématisée, et en coupe, un détail d'un tel cadran nu où la jonction entre le pied et le flasque est un point de touche entre un léger relief que comporte le flasque et un logement que comporte le pied ;
  • la figure 5 représente, de façon schématisée, et en coupe, un détail d'un tel cadran nu où la jonction entre le pied et le flasque est une liaison vissée entre une entrée de taraudage que comporte le flasque, et un filetage que comporte le pied;
  • la figure 6 représente, de façon schématisée, et en coupe, un tel cadran nu où la jonction entre le pied et le flasque est au niveau d'une rainure de révolution que comporte le flasque, qui porte une encoche en U que comporte le pied ;
  • la figure 7 représente, de façon schématisée, et en coupe, un détail d'un tel cadran nu où la jonction entre le pied et le flasque est au niveau d'une gorge de révolution que comporte le flasque, qui reçoit un tenon droit à faces parallèles que comporte le pied ;
  • la figure 8 représente, de façon schématisée, un ensemble cadran assemblé de façon irréversible par soudage ou brasage;
  • la figure 9 représente, de façon schématisée, une montre comportant un tel ensemble cadran ;
  • la figure 10 représente, de façon schématisée, un instrument de mesure ou appareil scientifique comportant un tel ensemble cadran.
Other characteristics and advantages of the invention will appear on reading the detailed description which follows, with reference to the appended drawings, where:
  • there figure 1 represents, schematically, and in section, a bare dial assembled but not welded or brazed, comprising a flange with, opposite an upper display surface, a lower surface on which are presented feet intended to be welded or brazed to this flange;
  • there figure 2 represents, schematically, and in section, a detail of such a bare dial where the junction between the foot and the flange is a flat surface;
  • there picture 3 represents, schematically, and in section, a detail of such a bare dial where the junction between the foot and the flange is a cylindrical socket, the foot penetrating into a bore of the flange;
  • there figure 4 represents, schematically, and in section, a detail of such a bare dial where the junction between the foot and the flange is a point of contact between a slight relief that comprises the flange and a housing that comprises the foot;
  • there figure 5 represents, schematically, and in section, a detail of such a bare dial where the junction between the foot and the flange is a screwed connection between a tapping entry that comprises the flange, and a thread that comprises the foot;
  • there figure 6 shows, schematically, and in section, such a bare dial where the junction between the foot and the flange is at the level of a groove of revolution that includes the flange, which carries a U-shaped notch that includes the foot;
  • there figure 7 represents, in a schematic way, and in section, a detail of such a bare dial where the junction between the foot and the flange is at the level of a groove of revolution that comprises the flange, which receives a straight tenon with parallel faces that includes the foot;
  • there figure 8 represents, schematically, a dial assembly irreversibly assembled by welding or brazing;
  • there figure 9 represents, schematically, a watch comprising such a dial assembly;
  • there figure 10 represents, schematically, a measuring instrument or scientific apparatus comprising such a dial assembly.

Description détaillée des modes de réalisation préférésDetailed Description of Preferred Embodiments

Il est décrit un cadran d'horlogerie 1 dont le matériau est un alliage léger, comportant un flasque 2 dont le matériau est un premier alliage léger.There is described a watch dial 1 whose material is a light alloy, comprising a flange 2 whose material is a first light alloy.

Plus particulièrement, ce cadran 1 est plan, ou sensiblement plan, ou à rayon de courbure supérieur à 30 mm.More particularly, this dial 1 is flat, or substantially flat, or with a radius of curvature greater than 30 mm.

Ce flasque 2 comporte, sur un premier côté au moins une zone d'affichage 3 visible par un utilisateur, et sur un deuxième côté opposé au premier côté au recto et appelé verso au moins un pied 4 pour le positionnement et/ou la fixation du cadran 1 dans un mouvement d'horlogerie 100.This flange 2 comprises, on a first side at least one display zone 3 visible by a user, and on a second side opposite the first side on the front and called the back at least one foot 4 for positioning and/or fixing the dial 1 in a clockwork 100.

Ce cadran 1 est un cadran dont les composants, notamment les pieds 4, sont démontables.This dial 1 is a dial whose components, in particular the feet 4, are removable.

Le flasque 2 comporte au moins une zone de réception 5 complémentaire à une zone d'extrémité 6 d'au moins un pied 4, lequel est un pied soudable 40, qui est agencé pour être soudé ou brasé avec le flasque 2 au niveau de l'interface entre la zone de réception 5 et la zone d'extrémité 6. Le matériau constitutif d'un tel pied soudable 40 est le premier alliage léger, ou bien un deuxième alliage léger qui est soudable ou brasable avec le premier alliage léger.The flange 2 comprises at least one receiving zone 5 complementary to an end zone 6 of at least one foot 4, which is a weldable foot 40, which is arranged to be welded or brazed with the flange 2 at the level of the interface between the reception zone 5 and the end zone 6. The constituent material of such a weldable foot 40 is the first light alloy, or else a second light alloy which is weldable or brazable with the first light alloy.

Et au moins une telle zone de réception 5 enveloppe une zone d'extrémité 6 respective relative à l'assemblage du même pied soudable 40, ou au moins une zone d'extrémité 6 enveloppe une zone de réception 5 respective relative à l'assemblage du même pied soudable 40, ou au moins une paire formée d'une zone d'extrémité 6 et d'une zone de réception 5 complémentaire comporte, dans un premier état assemblé non soudé ni brasé, un taraudage coopérant avec un filetage.And at least one such reception zone 5 envelopes a respective end zone 6 relating to the assembly of the same weldable foot 40, or at least one end zone 6 envelopes a respective reception zone 5 relating to the assembly of the same weldable foot 40, or at least a pair formed by an end zone 6 and a complementary reception zone 5 comprises, in a first assembled state that is not welded or brazed, an internal thread cooperating with a thread.

Dans une variante avantageuse, facilitant la préparation et le maintien lors d'opérations ultérieures, au moins une zone de réception 5 comporte un profil agencé pour coopérer de façon complémentaire en appui avec un profil complémentaire que comporte une zone d'extrémité 6 respective relative à l'assemblage du même pied soudable 40.In an advantageous variant, facilitating preparation and maintenance during subsequent operations, at least one reception zone 5 comprises a profile arranged to cooperate in a complementary way in support with a complementary profile that comprises a respective end zone 6 relating to assembly of the same weldable foot 40.

Dans une variante, au moins une zone de réception 5 enveloppe une zone d'extrémité 6 respective relative à l'assemblage du même pied soudable 40.In a variant, at least one receiving zone 5 envelops a respective end zone 6 relating to the assembly of the same weldable foot 40.

Dans une autre variante, au moins une zone d'extrémité 6 enveloppe une zone de réception 5 respective relative à l'assemblage du même pied soudable 40.In another variant, at least one end zone 6 surrounds a respective reception zone 5 relating to the assembly of the same weldable foot 40.

Dans une autre variante, au moins une zone de réception 5 est agencée pour coopérer en appui plan avec une zone d'extrémité 6 respective relative à l'assemblage du même pied soudable 40.In another variant, at least one reception zone 5 is arranged to cooperate in plane support with a respective end zone 6 relating to the assembly of the same weldable foot 40.

Dans une autre variante encore, au moins une paire formée d'une zone d'extrémité 6 et d'une zone de réception 5 complémentaire comporte, dans un premier état assemblé non soudé ni brasé, un taraudage coopérant avec un filetage.In yet another variant, at least one pair formed of an end zone 6 and a complementary reception zone 5 comprises, in a first assembled state that is not welded or brazed, an internal thread cooperating with a thread.

Dans une autre variante encore, au moins une zone de réception 5 est une partie d'une gorge ou d'une nervure de révolution, en particulier réalisées lors d'un usinage du flasque 2 par tournage, et la zone d'extrémité 6 qui lui est complémentaire est une partie d'une nervure ou de gorge de révolution complémentaire.In yet another variant, at least one receiving zone 5 is part of a groove or of a rib of revolution, in particular produced during machining of the flange 2 by turning, and the end zone 6 which is complementary to it is a part of a rib or groove of complementary revolution.

Plus particulièrement, le premier alliage léger et le deuxième alliage léger sont choisis parmi des alliages d'aluminium, de titane, ou de magnésium.More particularly, the first light alloy and the second light alloy are chosen from aluminum, titanium or magnesium alloys.

Dans une variante, on remplace le premier alliage léger ou/et le deuxième alliage léger par l'ensemble formé d'un métal pur revêtu de sa couche d'oxyde développée au contact de l'atmosphère, comme Al2O3 pour l'aluminium, ou TiO2 pour le titane.In a variant, the first light alloy or/and the second light alloy are replaced by the assembly formed of a pure metal coated with its oxide layer developed in contact with the atmosphere, such as Al 2 O 3 for the aluminum, or TiO 2 for titanium.

Dans une variante, le premier alliage léger et le deuxième alliage léger sont deux alliages d'aluminium. Ces alliages sont de préférence choisis parmi les alliages d'aluminium les plus facilement soudables. Plus particulièrement et non limitativement, ils sont choisis parmi les alliages d'aluminium sans durcissement structural, des familles 1000 (sans élément d'addition) et plus particulièrement le 1050 O à l'état recuit, 3000 (avec addition de manganèse) et plus particulièrement le 3003 O à l'état recuit, 5000 (avec addition de magnésium) qui se soude bien et est bien adaptée à l'anodisation, et plus particulièrement le 5086 O à l'état recuit ou encore le 5083 H111 écroui et stabilisé.In a variant, the first light alloy and the second light alloy are two aluminum alloys. These alloys are preferably chosen from among the most easily weldable aluminum alloys. More particularly and without limitation, they are chosen from aluminum alloys without structural hardening, families 1000 (without addition element) and more particularly 1050 O in the annealed state, 3000 (with addition of manganese) and more particularly the 3003 O in the annealed state, 5000 (with addition of magnesium) which welds well and is well suited to anodizing, and more particularly the 5086 O in the annealed state or even the hardened and stabilized 5083 H111.

Dans une autre variante, le premier alliage léger est un alliage d'aluminium, et le deuxième alliage léger est un alliage de titane, tel que TiO2, TiAl6 V4 dit TA6V, ou similaire. Ou bien le deuxième alliage léger est un alliage d'aluminium, et le premier alliage léger est un alliage de titane, tel que TiO2, TiAl6 V4 dit TA6V, ou similaire.In another variant, the first light alloy is an aluminum alloy, and the second light alloy is a titanium alloy, such as TiO 2 , TiAl 6 V 4 called TA6V, or similar. Either the second light alloy is an aluminum alloy, and the first light alloy is a titanium alloy, such as TiO 2 , TiAl 6 V 4 called TA6V, or similar.

Dans une autre variante encore, le premier alliage léger est un alliage d'aluminium, et le deuxième alliage léger est un alliage de magnésium qui se soude bien avec l'aluminium, tel que MgAl6Zn3 dit G-A6Z3, ou MgAlgZn dit G-A9Z, ou MgZn5Th2Zr, ou MgZr. La configuration inverse est naturellement possible.In yet another variant, the first light alloy is an aluminum alloy, and the second light alloy is a magnesium alloy which welds well with aluminum, such as MgAl 6 Zn 3 called G-A6Z3, or MgAl g Zn says G-A9Z, or MgZn 5 Th 2 Zr, or MgZr. The reverse configuration is of course possible.

Il est décrit encore un ensemble cadran 10 monobloc, dont le matériau est un alliage léger, comportant un cadran nu 1, et qui résulte de la transformation de ce cadran 1 par au moins une opération de soudage ou de brasage qui solidarise de façon irréversible ceux des composants qui ont été soudés ou brasés ensemble, en particulier le flasque 2 et tout ou partie des pieds 4. La zone de liaison soudée ou brasée ne comporte plus trace de la géométrie initiale des zones d'extrémité 6 et des zones de réception 5 complémentaire concernées par l'opération de soudage ou de brasage.There is also described a one-piece dial assembly 10, the material of which is a light alloy, comprising a bare dial 1, and which results from the transformation of this dial 1 by at least one welding or brazing operation which irreversibly secures those of the components which have been welded or brazed together, in particular the flange 2 and all or part of the feet 4. The welded or brazed connection zone does not no longer includes a trace of the initial geometry of the end zones 6 and of the complementary reception zones 5 concerned by the welding or brazing operation.

Ainsi, dans au moins une paire formée d'une zone d'extrémité 6 et d'une zone de réception 5 complémentaire, la zone d'extrémité 6 et la zone de réception 5 sont jointes de façon indémontable au niveau d'une liaison soudée ou brasée entre le flasque 2 et le pied soudable 40 concerné.Thus, in at least one pair formed by an end zone 6 and a complementary reception zone 5, the end zone 6 and the reception zone 5 are joined in an unremovable manner at the level of a welded connection. or brazed between the flange 2 and the weldable foot 40 concerned.

Il existe, à cet effet, des technologies compatibles avec le micro-soudage d'aluminium ou/et de titane, de façon très ponctuelle afin d'éviter toute déformation de la zone d'affichage 3 visible, en technologie laser ou plasma, avec des diamètres de zones chauffées très faibles, de l'ordre de 100 microns, et un échauffement réduit. Ces technologies permettent de souder ou braser un tel pied soudable 40 en alliage léger, notamment d'aluminium ou de titane soudé, en soudure bout à bout ou par point, et notamment par laser, ou plasma, ou ultrason.There are, for this purpose, technologies compatible with the micro-welding of aluminum and/or titanium, in a very specific way in order to avoid any deformation of the visible display zone 3, in laser or plasma technology, with very small diameters of heated zones, of the order of 100 microns, and reduced heating. These technologies make it possible to weld or braze such a weldable foot 40 made of light alloy, in particular welded aluminum or titanium, in butt or spot welding, and in particular by laser, or plasma, or ultrasound.

Plus particulièrement, dans chaque paire formée d'une zone d'extrémité 6 et d'une zone de réception 5 complémentaire, la zone d'extrémité 6 et la zone de réception 5 sont jointes de façon indémontable au niveau d'une liaison soudée ou brasée entre le flasque 2 et le pied soudable 40 concerné.More particularly, in each pair formed by an end zone 6 and a complementary reception zone 5, the end zone 6 and the reception zone 5 are joined in an unremovable manner at the level of a welded connection or brazed between the flange 2 and the weldable foot 40 concerned.

Dans une variante avantageuse, l'ensemble cadran 10 monobloc comporte une couche superficielle anodisée, ou une couche superficielle d'oxydation anodique chromique ou sulfurique, le traitement de surface correspondant étant réalisé après la ou les opérations de soudage ou de brasage.In an advantageous variant, the one-piece dial assembly 10 comprises an anodized surface layer, or a surface layer of chromic or sulfuric anodic oxidation, the corresponding surface treatment being carried out after the welding or brazing operation or operations.

Il est décrit encore une montre 1000 comportant un tel ensemble cadran 10.There is also described a watch 1000 comprising such a dial assembly 10.

Il est décrit encore un instrument scientifique comportant un tel ensemble cadran 10.There is also described a scientific instrument comprising such a dial assembly 10.

Il est décrit encore un appareil de mesure comportant un tel ensemble cadran 10.There is also described a measuring device comprising such a dial assembly 10.

L'invention concerne un procédé de fabrication d'un ensemble cadran 10 monobloc d'horlogerie dont le matériau est un alliage d'aluminium, un alliage de titane ou un alliage de magnésium. Selon l'invention, on réalise dans cet ordre les étapes suivantes :

  • réaliser, dans un premier état assemblé non soudé ni brasé, un cadran 1 d'horlogerie dont le matériau est un alliage léger, comportant un flasque 2 dont le matériau est un premier alliage léger, comportant sur un premier côté au moins une zone d'affichage 3 visible par un utilisateur, et sur un deuxième côté opposé au premier côté au recto et appelé verso au moins un pied 4 pour le positionnement et/ou la fixation du cadran 1 dans un mouvement d'horlogerie 100. Ce flasque 2 comporte au moins une zone de réception 5 complémentaire à une zone d'extrémité 6 d'au moins un pied 4, lequel est un pied soudable 40 agencé pour être soudé ou brasé avec le flasque 2 au niveau de l'interface entre la zone de réception 5 et la zone d'extrémité 6. Et le matériau constitutif d'un tel pied soudable 40 est le premier alliage léger, ou bien un deuxième alliage léger soudable ou brasable avec le premier alliage léger ;
  • réalise ledit cadran 1 avant soudage ou brasage avec au moins une paire, formée d'une dite zone d'extrémité 6 et d'une dite zone de réception 5 complémentaire, qui comporte, dans ledit premier état assemblé non soudé ni brasé, un taraudage coopérant avec un filetage ;
  • assembler de façon irréversible par soudage ou brasage au moins un pied soudable 40 au flasque 2 pour constituer cet ensemble cadran 10 monobloc.
The invention relates to a method of manufacturing a one-piece watch dial assembly 10 whose material is an aluminum alloy, a titanium alloy or a magnesium alloy. According to the invention, the following steps are carried out in this order:
  • produce, in a first assembled state that is neither welded nor brazed, a watch dial 1 whose material is a light alloy, comprising a flange 2 whose material is a first light alloy, comprising on a first side at least one zone of display 3 visible to a user, and on a second side opposite the first side on the front side and called the back side at least one foot 4 for positioning and/or fixing the dial 1 in a clockwork movement 100. This flange 2 comprises at at least one reception zone 5 complementary to an end zone 6 of at least one foot 4, which is a weldable foot 40 arranged to be welded or brazed with the flange 2 at the interface between the reception zone 5 and the end zone 6. And the constituent material of such a weldable foot 40 is the first light alloy, or else a second light alloy that can be welded or brazed with the first light alloy;
  • produces said dial 1 before welding or brazing with at least one pair, formed of a said end zone 6 and a said complementary reception zone 5, which comprises, in said first assembled state not welded or brazed, an internal thread cooperating with a thread;
  • assembling irreversibly by welding or brazing at least one weldable foot 40 to the flange 2 to form this one-piece dial assembly 10.

Plus particulièrement, on réalise le cadran 1 plan, ou sensiblement plan, ou à rayon de courbure supérieur à 30 mm,More particularly, the dial is produced in one plane, or substantially plane, or with a radius of curvature greater than 30 mm,

Plus particulièrement, on assemble de façon irréversible par soudage ou brasage chaque pied soudable 40 au flasque 2.More particularly, each weldable foot 40 is assembled irreversibly by welding or brazing to the flange 2.

Plus particulièrement, on effectue, après l'assemblage irréversible par soudage ou brasage, une opération d'anodisation, ou d'oxydation anodique chromique ou sulfurique, de la couche superficielle de l'ensemble cadran 10.More particularly, after the irreversible assembly by welding or brazing, an anodizing operation, or chromic or sulfuric anodic oxidation, is carried out on the surface layer of the dial assembly 10.

Dans une variante, on choisit le premier alliage léger et le deuxième alliage léger parmi des alliages d'aluminium, des alliages de titane, ou des alliages de magnésium.In a variant, the first light alloy and the second light alloy are chosen from among aluminum alloys, titanium alloys, or magnesium alloys.

Dans une variante, on choisit le premier alliage léger et le deuxième alliage léger qui sont deux alliages d'aluminium.In a variant, the first light alloy and the second light alloy are chosen, which are two aluminum alloys.

Dans une variante, on choisit le premier alliage léger et le deuxième alliage léger qui sont deux alliages de titane.In a variant, the first light alloy and the second light alloy are chosen, which are two titanium alloys.

Dans une variante, on choisit le premier alliage léger et le deuxième alliage léger qui sont deux alliages de magnésium.In a variant, the first light alloy and the second light alloy are chosen, which are two magnesium alloys.

Dans une variante, on choisit le premier alliage léger qui est un alliage d'aluminium, et le deuxième alliage léger qui est un alliage de titane, ou inversement.Alternatively, the first light alloy is chosen which is an aluminum alloy, and the second light alloy which is a titanium alloy, or vice versa.

Le choix particulier d'un premier alliage léger et d'un deuxième alliage léger qui sont deux alliages d'aluminium est avantageux pour l'application d'un procédé d'anodisation.The particular choice of a first light alloy and of a second light alloy which are two aluminum alloys is advantageous for the application of an anodizing process.

L'alternative de pieds en titane ou alliage de titane donne les mêmes capacités, avec l'avantage d'une grande stabilité dimensionnelle quel que soit le nombre des traitements appliqués. Cette alternative est favorable à l'application de différents traitements de conversion chimique sur un même cadran.The alternative of titanium or titanium alloy feet gives the same capabilities, with the advantage of great dimensional stability regardless of the number of treatments applied. This alternative is favorable to the application of different chemical conversion treatments on the same dial.

Le fait de souder ou braser les pieds en début de cycle évite le risque d'un rebut en fin de production quand le produit a atteint sa valeur maximale.Welding or brazing the feet at the start of the cycle avoids the risk of scrap at the end of production when the product has reached its maximum value.

Claims (11)

  1. Method for manufacturing a one-piece timepiece dial assembly (10) whose material is an aluminium alloy, a titanium alloy or a magnesium alloy, characterized in that the following steps are performed in the following order:
    - making, in a first, non-welded and non-brazed assembled state, a timepiece dial (1) whose material is an aluminium alloy, a titanium alloy or a magnesium alloy, including a flange (2) whose material is first alloy, including, on a first side, at least one display area (3) visible to a user, and on a second side, at least one foot (4) for positioning and/or securing said dial (1) in a timepiece movement (100), said flange (2) including at least one receiving area (5) complementary to an end area (6) of at least one said foot (4) which is a weldable foot (40) arranged to be welded or brazed to said flange (2) at the interface between said receiving area (5) and said end area (6), and wherein the material of said weldable foot (40) is said first alloy or a second alloy that can be welded or brazed to said first alloy;
    - making said dial (1) before welding or brazing with at least one pair formed of a said end area (6) and a said complementary receiving area (5),which includes, in said first non-welded and non-brazed assembled state, a thread cooperating with a thread;
    - irreversibly assembling by welding or brazing at least one said weldable foot (40) to said flange (2) to form said one-piece dial assembly (10).
  2. Method for manufacturing a dial assembly (10) according to claim 1, characterized in that each said weldable foot (40) is irreversibly assembled by welding or brazing to said flange (2).
  3. Method for manufacturing a dial assembly (10) according to claim 2, characterized in that said dial (1) is made before welding or brazing with at least one said receiving area (5) which envelops, in said first non-welded and non-brazed assembled state, a said respective end area (6) relative to the assembly of the same said weldable foot (40).
  4. Method for manufacturing a dial assembly (10) according to claim 2, characterized in that said dial (1) is made before welding or brazing with at least one said end area (6) which envelops, in said first non-welded and non-brazed assembled state, a said respective end area (5) relative to the assembly of the same said weldable foot (40).
  5. Method for manufacturing a dial assembly (10) according to claim 2, characterized in that said dial (1) is made before welding or brazing with at least one pair formed of a said end area (6) and a said complementary receiving area (5), which includes, in a first, non-welded and non-brazed assembled state, an internal thread cooperating with an external thread.
  6. Method for manufacturing a dial assembly (10) according to one of claims 1 to 5, characterized in that, after irreversible assembly by welding or brazing, an operation of anodization, or chromic or sulphuric anodic oxidation of the surface layer of said dial assembly (10) is performed.
  7. Method for manufacturing a dial assembly (10) according to one of claims 1 to 6, characterized in that said first alloy and said second alloy are chosen from among alloys of aluminium, of titanium or of magnesium.
  8. Method for manufacturing a dial assembly (10) according to claim 7, characterized in that said first alloy and said second alloy are chosen to be two aluminium alloys.
  9. Method for manufacturing a dial assembly (10) according to claim 7, characterized in that said first alloy and said second alloy are chosen to be two titanium alloys.
  10. Method for manufacturing a dial assembly (10) according to claim 7, characterized in that said first alloy and said second alloy are chosen to be two magnesium alloys.
  11. Method for manufacturing a dial assembly (10) according to claim 7, characterized in that said first alloy is chosen to be an aluminium alloy and said second alloy is chosen to be a titanium alloy, or vice versa.
EP17811613.3A 2016-12-21 2017-12-13 Timepiece dial made of a light metal alloy material Active EP3559758B1 (en)

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EP16205879.6A EP3339970B1 (en) 2016-12-21 2016-12-21 Timepiece dial made of a light metal alloy material
PCT/EP2017/082534 WO2018114500A1 (en) 2016-12-21 2017-12-13 Timepiece dial the material of which is a light alloy

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WO2021104698A1 (en) 2019-11-26 2021-06-03 Rolex Sa Connecting ring for a timepiece dial, timepiece dial plate and timepiece dial assembly method
EP3835880B1 (en) 2019-12-10 2022-08-10 Comadur S.A. Horological dial with feet

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JP6827126B2 (en) 2021-02-10
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EP3339970B1 (en) 2022-03-23
US20190391533A1 (en) 2019-12-26
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CN110178093A (en) 2019-08-27
CN110178093B (en) 2021-03-09

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