EP1967087A1 - Gliedstifte für Armbänder - Google Patents

Gliedstifte für Armbänder Download PDF

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Publication number
EP1967087A1
EP1967087A1 EP08152200A EP08152200A EP1967087A1 EP 1967087 A1 EP1967087 A1 EP 1967087A1 EP 08152200 A EP08152200 A EP 08152200A EP 08152200 A EP08152200 A EP 08152200A EP 1967087 A1 EP1967087 A1 EP 1967087A1
Authority
EP
European Patent Office
Prior art keywords
hinge pin
sheet
solder material
hinge
stamping
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP08152200A
Other languages
English (en)
French (fr)
Inventor
Freddy Lei
Jean-Marc Guenat
Robert Tschantré
Martin Künzi
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.)
Cendres and Metaux SA
Original Assignee
Cendres and Metaux 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 Cendres and Metaux SA filed Critical Cendres and Metaux SA
Priority to EP08152200A priority Critical patent/EP1967087A1/de
Publication of EP1967087A1 publication Critical patent/EP1967087A1/de
Withdrawn legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44C—PERSONAL ADORNMENTS, e.g. JEWELLERY; COINS
    • A44C5/00—Bracelets; Wrist-watch straps; Fastenings for bracelets or wrist-watch straps
    • A44C5/02—Link constructions

Definitions

  • the invention relates to hinge pins for bracelets, in particular watch bracelets or bracelets for jewelery.
  • the invention also relates to a method of manufacturing hinge pins and a method of manufacturing a bracelet with articulated links.
  • Some bracelets are constituted of links articulated together by hinge pins, the hinge pins being welded at their ends to outer links.
  • fixing the hinge pin on a watch link element is achieved by welding the ends of the hinge pin in the bottom of the blind hole of the link.
  • the ends of the hinge pins each comprise a smaller diameter portion on which is deposited a weld washer, then assembles the bracelet by introducing the hinge pins in the bottom of the blind holes of the links.
  • the hinge pins are then welded to the links by introducing the bracelet thus mounted in an oven in which the solder washers are melted.
  • the welding of the ends of the hinge pin in blind holes of the outer links has an aesthetic value since this method allows to completely hide the joint.
  • a disadvantage is that the operation of setting the solder washers on the ends of the hinge pins is long and delicate, especially because of the small dimensions of the parts. The risk that the welding washers fall during the various manipulations of the hinge pins before assembly is not negligible. In addition, it is difficult to effectively control the presence of solder washers at the end of the hinge pins before assembly. However, the lack of welding at one end of the hinge axis could lead to a risk of total or partial disassembly of the link elements.
  • the document CH220804 is directed to a method of manufacturing objects having a rod and a base such as bolts or screws, wherein a solder member is inserted into a housing in the head portion to secure the two parts together.
  • the solder piece may be in the form of a ring, a pin, a plate, a stud, a tab, a pellet or a powder, and may be introduced into a housing provided for this purpose in the rod. .
  • the brazing piece being introduced at the time of assembly, the disadvantages described above also apply here, in particular the problem of holding the solder member on the rod during various assembly operations.
  • a device for fixing a metal hinge pin by welding in a hole in a metal element where the welding is carried out by melting a quantity of solder between the hinge pin and a wall of the hole after the introduction of the hinge pin into the hole.
  • the hinge axis comprises an inner recess opening outwardly of the hinge axis and the weld extends at least partially in the recess.
  • the main object of the invention is to propose a hinge pin intended to be welded to a bracelet link, which is easy to handle and which can be assembled at the link of a bracelet in a reliable and economical way.
  • the invention also relates to a reliable and economical manufacturing method of such a hinge axis.
  • the invention also provides a reliable and economical manufacturing method of a bracelet comprising links and hinge pins.
  • hinge pins for jewelery or watch bracelets that simplify and reduce manual operations in the assembly of hinge pins to the links.
  • Objects of the invention are made by a welding hinge pin according to claim 1, and a method of manufacturing a hinge pin according to claim 9.
  • the welding hinge pin comprises an axis with a central hinge portion, adapted to be pivotally mounted in a cavity of a link, and at least one attachment portion extending one end of the central hinge portion, and a solder material disposed on the attachment portion for welding the fastener portion into a blind housing of a link, characterized in that the solder material is the shape of a sheet pressed around the fastening portion and fixed rigidly thereto.
  • the cutting and stamping of the sheet of solder material is carried out simultaneously by stamping a sheet of solder material with the end of the hinge pin in a die drawing machine comprising a cavity and a cutting tool consisting of a cutting blade concentrically placed with the cavity.
  • the sheet of solder material is first cut with a cutting tool and then stamped around the end of the hinge pin in a die. stamping.
  • cutting and stamping are performed in a single step using a single die for cutting and stamping.
  • the sheet of solder material is placed on the die cutting and stamping die which has a cavity and a groove concentric with the cavity.
  • the cutting tool is pressed into the bottom of the groove to cut a solder disc.
  • the solder disc is then stamped with the end of the hinge pin.
  • a cutting tool for example of cylindrical shape with a cutting edge, comprises a concentric stamping punch and smaller diameter, set back relative to the cutting edge.
  • the sheet of solder material is first cut and stamped into a first die having a cavity and a cutting groove concentric with the cavity, resulting in a solder piece having the shape of a capsule.
  • the welding capsule is then placed on a second stamping die having a cavity and pressed a second time by the end of the hinge pin so as to be fixed thereto.
  • the part of a sheet of solder material is preformed by a stamping, stamping, pressing, hammering, coining or rolling process or a combination of at least two months. of these methods to give it a half-wound lamella form.
  • the strip is then pressed laterally around the fastening portion of the hinge pin so as to cover the periphery of the fastening portion with the welding material.
  • These axes of articulation can be used in a method of manufacturing a bracelet in which the hinge axis is fixed in a blind hole formed in external link elements of an articulated bracelet of a watch or jewelery.
  • the hinge pins can be introduced into the hole of the links and welded by fusion of the welding material attached to the end of the hinge axis.
  • hinge pins makes it possible to avoid any operation of feeding, setting up and handling the weld between the end of the hinge pin and the wall of the hole. and ensures the presence of the appropriate amount of weld on each of the hinge pins and thereby obtain a greater ease, accuracy and reliability of welding.
  • hinge pins can be used favorably for the attachment by welding of a hinge pin in holes provided in external link elements of an articulated wristwatch or jewelry.
  • the figure 1 represents a portion 1 of articulated link bracelet comprising central links 2, external links 3 and hinge pins 4.
  • the hinge pins are inserted in passages 5 provided for this purpose in the central link elements pivotally and, secondly, fixed at their ends 6 in blind holes 7 provided in the outer link members.
  • the hinge pin has a cylindrical central portion 9 and attachment portions 10 extending opposite ends of the central portion and forming the ends of the hinge pin.
  • the attachment portions have a width L smaller than the diameter D of the central portion.
  • the hinge pin further comprises a piece 11 of a sheet of solder material fixed to the attachment portion. The piece of welding material is applied to the ends of the hinge pin by a method of cutting and stamping.
  • the central part of the hinge pin may have a length of about 12 mm and a diameter of about 1.2 mm and the attachment parts a length of about 4 mm and a diameter of about 0.8 mm respectively.
  • the thickness of the sheet of solder material is for example between 0.05 and 0.2 mm.
  • the ends of the hinge axis that is to say the fastening portions comprising the welding material, are introduced into the blind holes 7 and the assembly, or at least the external link, is heated in order to Melt the solder material and fix the hinge pin rigidly to the outer links.
  • the hinge pin is preferably made of a noble metal or alloy comprising at least one noble metal such as 18 carat gold (Au 750), platinum 950 (Pt 950), or palladium 950 (Pd 950).
  • the hinge pin can also be made of steel, brass or any other machinable material.
  • the sheet of solder material may be made of a noble metal or an alloy comprising none or at least one noble metal.
  • a preferred alloy composition contains at least 75% of fine gold, the balance may include precious metals such as Ag, Pd, Pt and / or base metals ( Cu, Zn, ).
  • the cutting and stamping steps of the sheet of solder material are performed simultaneously.
  • Such a process is schematically shown in the figure 2 .
  • a sheet of welding material 16 is disposed between a stamping die 12 and one of the ends 6 of the hinge pin 4.
  • the stamping die has a cavity 13, matching the final shape of the piece 11 of sheet of the welding material stamped on the fastening portion 10.
  • the cavity inlet has a chamfer or a spoke 14 to prevent tearing of the sheet of solder material during stamping.
  • a cutting tool comprises a cutting blade 15 placed on the surface of the stamping die, concentric with the cavity 13.
  • the end of the hinge pin 6 is pressed against the sheet 16 of plastic welding material plastically deforming the latter by pressing it towards the bottom of the cavity 13.
  • the sheet is cut by the cutting blade 15.
  • the diameter of the cutting blade makes it possible to cut a workpiece in the form of a disk of sufficient diameter to be able to cover the whole of the fastening portion 10 at the end of the spindle. joint.
  • the pressure applied between the hinge pin and the bottom of the cavity 13 makes it possible to permanently fix the piece of welding material on the fixing part.
  • the sheet of solder material is first cut with a cutting tool 317 and then stamped by the end of the hinge pin in a stamping die 312.
  • the cutting tool 317 for example of cylindrical shape having a cutting edge 318 is pressed against the sheet of solder material 16 placed on a cutting die (not shown) in order to cut a disk 20 with a diameter large enough to covering all or part of the surface of the fastening portion 10 at the end of the hinge pin during the subsequent stamping operation.
  • the disk 20 of solder material is then placed in a housing 322 formed in the stamping die 312.
  • the die also comprises a drawing cavity 313 disposed concentrically with the housing.
  • the shape of the cavity matches the final shape of the piece of welded material sheet stamped on the attachment portion 10 and conically grows 324 to the housing 322.
  • the end 6 of the hinge pin is pressed on the solder disc 20 to stamp it at the bottom of the cavity 313.
  • the cutting and stamping steps described in the previous method are performed in a single step using a single die for cutting and stamping.
  • the sheet of solder material 16 is placed on the die-cut die 412 having a cavity 413 with a conically-shaped inlet 424 and a groove concentric with the cavity.
  • the cutting tool for example of cylindrical shape having a cutting edge 418, is pressed into the bottom of the groove of the same diameter in order to cut a disk of solder material.
  • the disc of solder material is then stamped with the end 6 of the hinge pin.
  • a cutting tool 517 for example of cylindrical shape with a cutting edge 518 comprises a stamping punch 32 at its center, set back with respect to the cutting edge.
  • a first cutting and drawing die 512 comprises a cavity 34, matching the shape of the punch 32 plus the thickness of the sheet of material to be welded, and a groove 35 of the same diameter as the cutting edge of the cutting tool. and concentric with the cavity 34.
  • the sheet 16 of solder material, placed on the die, is cut and stamped simultaneously by the cutting tool and the resultant punch into a solder piece having the shape of a capsule 36.
  • the capsule 36 is then placed on a second stamping die 512 'having a cavity 513 conforming to the final shape of the end of the hinge pin and having a larger diameter inlet 39.
  • the capsule 36 is then stamped by the end 6 of the hinge pin so as to be permanently fixed to the fixing portion 10.
  • the welding material is applied to the fastening portions 10 from strips 601 preformed in a strip 600.
  • the figure 10a shows a top view of the 600 strip
  • the figure 10b is a front view
  • the figure 10c is a side view.
  • the strip 600 comprises a plurality of lamellae 601 which are preferably preformed into a half-wound form, or any other form practical for winding about an axis, and connected to the remainder of the strip via a narrow part 602.
  • the edge 603 of the band comprises perforations 604 pierced at regular intervals and intended to cooperate with a drive means (not shown) of the band 600.
  • Strips 605, arranged alternately with the lamellae 601, are formed in shape of "V", or any other form of a height at least equal but preferably higher than that of the half-rolled slats. At a eventual winding of the band 600, for example for storage purposes, the strips come to rest on one another and thus prevent the winding of the band deforms the slats 601.
  • the narrow portion 602 can be replaced by a zone of reduced thickness and / or pre-perforated or tear line formed at the junction between the slats 601 and the edge 603 of the strip, or any other weakening the junction between the slats 601 and the edge 603 of the strip so as to easily detach the slats 601 from the rest of the strip once these wrapped around the fastening portion 10 of the hinge pin.
  • the strip 600 may be preformed by known methods of stamping, stamping, pressing, stamping or rolling or a combination of at least two of these methods.
  • the Figures 10a to 10d show the different stages of manufacture of the strip 600 where we see, from the left to the right, the cutting and shaping of the slats 601 and strips 605.
  • the strip 600 is made of welding material or, alternatively, only a portion of the strip, corresponding to the area where the slats are cut, is made of welding material.
  • the fixing portion is disposed laterally inside the lamella 601, symmetrically with respect to its longitudinal axis, and the two lips 606 of the lamella are closed by a method of stamping.
  • the lamella 601 is placed on a matrix of deformable and elastic material (not shown), held in a jaw (not shown).
  • a metal punch (not shown), preferably guided by the jaw, drives the attachment portion 10 and the lamella 601 in the matrix, which forces the blade to flow around the fixing portion.
  • the two lips 606 of the lamella 601 can be resealed by clamping, using a clamp, for example, of the type of a crimping pliers for the electrical connectors.
  • the slats 601 wound on the fastening portions 10 are then separated from the rest of the strip 600 at the narrow portion 602, for example, by breaking or cutting. After application, the welding strips 601 cover the periphery of the fixing part 10.
  • the strip may comprise two integral parts, 600 ', 600 ", opposite and symmetrical.
  • the two fastening portions 10 are positioned at the interior of two opposing lamellae, for simultaneously applying the piece of solder material 11 to the two fastening portions 10.
  • two separate strips 600 may be arranged oppositely and symmetrically relative to one another. In order to be able to adjust the distance between the two bands, the latter configuration makes it easier to adapt the application method to hinge pins 4 of different lengths.
  • the strip 600 may be preformed by a first machine (not shown) and the application of the slats 601 to the fastening portions 10 may be performed in a second step by the first machine or a second machine.
  • the method also has the advantage of producing a minimum of material drop.
  • the solder material sheet piece and the hinge pin attachment portion may have other shapes as shown in the drawings.
  • Figures 6a to 9b the fixing portion may comprise concentric grooves to form edges, for example of cylindrical 40 or conical 40 'or comprise splines 42, 42' in the direction of the length of the hinge axis.
  • the piece 711 of solder material sheet may be applied only around the periphery of the attachment portion 10 but not on its end 6 ( figure 7 ).
  • solder material sheet piece 811, 811 ' can be applied only to the end of the hinge pin ( Figures 8a, 8b ).
  • a conically shaped cavity 44 may be pierced at the end of the hinge axis ( figure 8a ) or a circular groove 46 can be formed by turning at the end of the hinge axis ( figure 8b ).
  • the solder material enters the cavity or groove promoting adhesion of the sheet of solder material to the end of the hinge axis.
  • the fixing part of the hinge pin may be of non-circular section, for example square 910, as illustrated in the variant of FIG. Figures 9a, 9b , with a width L less than the diameter D of the piece of pressed welding material 911.

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EP08152200A 2007-03-08 2008-03-03 Gliedstifte für Armbänder Withdrawn EP1967087A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP08152200A EP1967087A1 (de) 2007-03-08 2008-03-03 Gliedstifte für Armbänder

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP07405075A EP1969959A1 (de) 2007-03-08 2007-03-08 Gelenkstifte für Armbänder
EP08152200A EP1967087A1 (de) 2007-03-08 2008-03-03 Gliedstifte für Armbänder

Publications (1)

Publication Number Publication Date
EP1967087A1 true EP1967087A1 (de) 2008-09-10

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Family Applications (2)

Application Number Title Priority Date Filing Date
EP07405075A Withdrawn EP1969959A1 (de) 2007-03-08 2007-03-08 Gelenkstifte für Armbänder
EP08152200A Withdrawn EP1967087A1 (de) 2007-03-08 2008-03-03 Gliedstifte für Armbänder

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP07405075A Withdrawn EP1969959A1 (de) 2007-03-08 2007-03-08 Gelenkstifte für Armbänder

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EP (2) EP1969959A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2803286A1 (de) * 2013-05-17 2014-11-19 Comadur S.A. Montagesystem von mindestens drei Teilen
EP3653074A1 (de) * 2018-11-13 2020-05-20 Comadur S.A. Zusammenbau von elementen, wie die kettenglieder eines armbands

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH220804A (fr) 1941-04-23 1942-04-30 Nouvelle Zesar S A Procédé de fabrication d'objets comportant une tige et une embase, tels que boulons, vis, etc.
FR2743475A1 (fr) * 1996-01-17 1997-07-18 Werthanor Sa Procede de soudage d'axes d'articulation sur des elements destines a former des maillons articules d'un bracelet
EP0842731A1 (de) 1996-11-14 1998-05-20 Werthanor S.A. Verfahren und Vorrichtung zum Fixieren einer Gelenkstange, mit diesem Verfahren hergestelltes mehrgliedriges Armband
EP1023964A1 (de) 1999-01-29 2000-08-02 Werthanor S.A. Verfahren und Vorrichtung zum Fixieren einer Gelenkstange, mit dieser Vorrichtung hergestelltes mehrgliedriges Armband
EP1155630A1 (de) * 2000-05-17 2001-11-21 Promotion Spa Metallisches Gliederarmband

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH220804A (fr) 1941-04-23 1942-04-30 Nouvelle Zesar S A Procédé de fabrication d'objets comportant une tige et une embase, tels que boulons, vis, etc.
FR2743475A1 (fr) * 1996-01-17 1997-07-18 Werthanor Sa Procede de soudage d'axes d'articulation sur des elements destines a former des maillons articules d'un bracelet
EP0842731A1 (de) 1996-11-14 1998-05-20 Werthanor S.A. Verfahren und Vorrichtung zum Fixieren einer Gelenkstange, mit diesem Verfahren hergestelltes mehrgliedriges Armband
EP1023964A1 (de) 1999-01-29 2000-08-02 Werthanor S.A. Verfahren und Vorrichtung zum Fixieren einer Gelenkstange, mit dieser Vorrichtung hergestelltes mehrgliedriges Armband
EP1155630A1 (de) * 2000-05-17 2001-11-21 Promotion Spa Metallisches Gliederarmband

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2803286A1 (de) * 2013-05-17 2014-11-19 Comadur S.A. Montagesystem von mindestens drei Teilen
US9345292B2 (en) 2013-05-17 2016-05-24 Comadur S.A. System of assembling at least three parts
RU2651760C2 (ru) * 2013-05-17 2018-04-23 Комадюр С.А. Система сборки по меньшей мере трёх частей
EP3653074A1 (de) * 2018-11-13 2020-05-20 Comadur S.A. Zusammenbau von elementen, wie die kettenglieder eines armbands
US11523662B2 (en) 2018-11-13 2022-12-13 Comadur Sa Assembly of elements such as bracelet links

Also Published As

Publication number Publication date
EP1969959A1 (de) 2008-09-17

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