EP2879817B1 - Procédé de réalisation d'un raccord entre un élément globalement plat, métallique ou non métallique, et un élément allongé tel qu'un fil, et appareil de réalisation dudit procédé - Google Patents

Procédé de réalisation d'un raccord entre un élément globalement plat, métallique ou non métallique, et un élément allongé tel qu'un fil, et appareil de réalisation dudit procédé Download PDF

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Publication number
EP2879817B1
EP2879817B1 EP13758761.4A EP13758761A EP2879817B1 EP 2879817 B1 EP2879817 B1 EP 2879817B1 EP 13758761 A EP13758761 A EP 13758761A EP 2879817 B1 EP2879817 B1 EP 2879817B1
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EP
European Patent Office
Prior art keywords
punch
wire
stripper
metal
joint
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.)
Active
Application number
EP13758761.4A
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German (de)
English (en)
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EP2879817A1 (fr
Inventor
Olivier Dubugnon
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.)
Bollhoff Attexor SA
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Bollhoff Attexor SA
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Publication of EP2879817A1 publication Critical patent/EP2879817A1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F15/00—Connecting wire to wire or other metallic material or objects; Connecting parts by means of wire
    • B21F15/10—Connecting wire to wire or other metallic material or objects; Connecting parts by means of wire wire with sheet metal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J15/00—Riveting
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/06—Riveted connections
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/04—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for forming connections by deformation, e.g. crimping tool
    • H01R43/048—Crimping apparatus or processes

Definitions

  • the present invention refers to a method for making joints by means of clinching between first and second members, metal or non-metal, whereby said first member, at least in and close to the location where the joint is going to be made, has a generally sheet-formed or flat geometry, and said second member, in the same location, has an elongated form with a length generally much bigger than any measure of its arbitrary section.
  • a second member could for instance be a wire, a connection pin of an electrical or electronic component etc.
  • the section could e.g. be essentially circular which is the case for ordinary electrical conductors or wires or square or have the form of a parallelepiped which is sometimes the case for connection pins of electronic components.
  • the elongated member has its longitudinal axis essentially parallel to the surface of said first member.
  • the invention also refers to an apparatus for carrying out said method.
  • the clinching technique is thus forming the joint without the use of additional components like screws or rivets or similar.
  • the generally flat members to be joined are deformed by means of the clinching tools to form the joint.
  • a similar technical problem consists in joining a first elongated member with a length generally much bigger than any measure of its arbitrary section, e.g. a wire to a second essentially flat member without the use of additional components, only by means of appropriately deforming the members. Solutions to this technical problem find applications e.g. in connecting two electrically conducting members like an electrical wire to a generally flat electrically conducting element.
  • a first type makes the joint in two steps.
  • the generally flat member is prepared in a particular predefined way.
  • the pre-configuration could include cutting and bending the member or making holes or slots in the same.
  • the wire is connected to the flat member in a clinching operation in which mainly the material of the wire by means of the clinching tools is plastically deformed floating into said holes or slots creating the joint.
  • a solution of this type is shown in e.g. the document FR2935550 .
  • the flat member comprises at least locally where the joint is going to be made two superposed sheets.
  • An electrical wire is positioned between the superposed sheets and an ordinary clinch joint is fixing the sheet-formed members and the wire together.
  • a solution of this type is shown in e.g. the document FR 2736471 .
  • a fourth type of solution the generally flat member is locally cut and deformed so that it could be rolled around the electrical wire or presenting a "tunnel" in which the electrical wire could be inserted.
  • the joint is then created by squeezing the deformed part of the generally flat member around the electrical wire.
  • a solution of this type is shown in e.g. the documents DE102006013347 and EP0634810 .
  • One object of the present invention is to provide a method and an apparatus making it possible to fix an elongated member with small sectional measures, for instance a wire, a connection pin of an electrical or electronic component etc. directly to a generally flat member by means of clinching without previously treating the elongated member or the generally flat member by means of deformation changing its general geometry before the joining procedure is taking place.
  • a further object of the present invention is to provide greater almost unlimited choice of joining position on the generally flat member, thus greater flexibility.
  • the invention is not limited to making combined mechanical and electrical joints between electrically conducting members.
  • a pure mechanical application in which the method and apparatus could be used is fixing e.g. a wire grid to a frame, e.g. a metal wire grid to a sheet metal frame by means of clinching. In this case the appropriate joints will be made between a wire in the grid and the metal sheet.
  • either of the two members or both could be pre-treated with an electrically isolating layer which makes the joint pure mechanical.
  • wire or “metal wire” in this context includes a solid wire, e.g. an ordinary solid electrical cupper wire or conductor or similar, but also different types of multiple stranded wires, twisted and non-twisted, as well as multiple stranded wires which have been pre-compressed at the free end portion without changing the general geometry.
  • Figure 1a shows a tool head 3 comprising a punch 1 and a stripper 2.
  • the punch 1 is arranged fixed to the tool head 3 while the stripper 2 is movable co-axially with the tool head 3.
  • Fig 1a to If illustrate a single stroke method for fixing e.g. a wire against a flat metal sheet.
  • the designation single stroke refers to the fact that the joint between the members is made during one single relative movement between the punch and the die.
  • Single stroke methods for joining sheet formed members to each other are known in the art.
  • the stripper 2 is mounted on a cylinder-piston arrangement 4, 5 forming an integral part of the tool head 3.
  • the piston 4 is biased in its lower position by means of a spring 6.
  • This arrangement forms the initial state of the first tool part.
  • the piston 1 is somewhat retracted in relation to the stripper 2 so that the end portion of the stripper and the punch form an elongated space for receiving the end portion of the wire 12 to be fixed to the generally flat member 7.
  • the wire here illustrated as a multiple stranded wire, has been placed between the end portions of the stripper 2.
  • the generally flat metal sheet 7 is resting against the top of the matrix or die 8.
  • the matrix is here only schematically illustrated and comprises in this embodiment an anvil 9 and two or several laterally displaceable die elements 10.
  • the die elements are in this example shown resting against a support surface 11 perpendicular to the vertical axis of the tool part.
  • Fig 2 shows a possible punch and die arrangement for a single stroke method.
  • An expandable die or matrix of this type is known in the art.
  • the width W of the flat punch is advantageously essentially similar to the diameter of the wire to be fixed. Or it could be slightly bigger.
  • the movable die elements 100 are shown in this case guided on a pin 13 and the counter force is created by means of spring elements 14.
  • the cooperating edges of the movable die elements 100 and the punch 1 could be made cutting through the metal sheet 7 or be rounded in order not to cut the metal sheet when creating a leakproof joint with the wire 12.
  • Fig 3 shows two different punch forms 101, 102.
  • the upper figure is showing rounded edges designed not to cut the wire during the joint procedure.
  • the punch will press the wire into the generally flat member and in certain embodiments cut through the flat member along the co-operating edges 103 and 104 on the punch 101 and the movable die elements 100 respectively parallel to the axis of the wire.
  • the wire should of course not be cut perpendicular to its axis.
  • the lower figure shows a form of the punch 102 which will create two consecutive joining zones along the axis of the wire which will give a bridged joint. This is a form especially advantageous when working in thin metal sheets, cf. Fig 10 .
  • Fig 4 shows alternatives for the form of the end portion of the punch 1 and the top surface of the anvil 9. These forms could be of advantage when the wire is of the multiple stranded type.
  • Fig 5 shows a special form of the stripper 200 provided with means for gripping and holding the wire before the fixing.
  • the stripper In the elongated space formed by the end portions of the stripper parts 200 and the tip of the punch 1 for receiving the end portion of the wire 12, upper and lower parallel ridges 15 and 16 respectively are arranged on the inside of the two stripper parts 200.
  • the stripper can expand in order to grip and hold the wire.
  • the two stripper halves200 are pivoting outwardly against the force from a spring element 17 when the wire is entered into position.
  • the punch 1 is travelling downwards relative to the stripper parts they will again pivot outwards leaving space for the punch to pass the ridges.
  • This solution allows various sizes of the wires, somewhat smaller or wider than the punch.
  • Fig 6 shows the different steps in a double stroke method for fixing the wire. Double stroke methods for joining metal sheets to each other are also known in the art.
  • the wire 12 is held between the front ends of the stripper 2 as described in connection to Fig 1 .
  • the vertical position of an anvil 900 cooperating with the die is here controlled by a cylinder-piston assembly 18, 19.
  • the anvil 900 is not active which means that it follows the downward movement of the wire 12 and the metal sheet 7 when the punch 1 moves downwards.
  • the anvil is activated by means of e.g. hydraulic pressure into the port 20 of the cylinder 18 and lifts the cut out portion of the metal sheet and the partly expanded wire to position them outside the fixed die. In that position the punch 1 makes a second stroke against the wire 12 which will then expand further on the lower side of the metal sheet. The counter force is created by the anvil 900 which is blocked in this step.
  • Fig 7 shows a further variant of the method for fixing the wire. Instead of lifting the wire 12 and cut out portion 7" of the metal sheet 7 from the position illustrated in Fig 6b the punch 1 is retracted and a high force is applied between the stripper 2 and the fixed die. This will laterally expand the material of the metal sheet 7 in over the top surface of the wire 12 and create the locking.
  • Fig 8 illustrates an embodiment for gripping and holding a wire 12 according to the inventive method.
  • the stripper 2 is here provided with a pair of jaws 21, one on each side of the elongated space for receiving the end portion of the wire 12 to be fixed.
  • the jaws are arranged pivoting and biased against each other by means of two spring elements 22.
  • the free end of each jaw is provided with a recess 23.
  • Fig 9 illustrates a further embodiment for gripping and holding the wire by means of jaws 25, 26.
  • the jaws are as in Fig 8 pivoting around their respective pivot axis and are in this embodiment hold together by means of a toroidal spring 24.
  • this solution is very flexible as it allows to work with different wire diameters.
  • the arrangement also holds the wire well centered during the movement towards the sheet surface.
  • the grip entry 27 is in this case formed slightly expanded away from the punch. This makes the tool especially adapted for pick-and-place-applications in automated procedures.
  • Fig 10 shows two arrangements of cooperating punch and die for creating bridged joints.
  • the lower figure shows a side view of a clinched wire of the type twisted multiple stranded wires.
  • a bridge 28 is separating two consecutive squeezed zones 29. This reinforces the crimping and holding effect especially with thin sheets 7.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Wire Processing (AREA)

Claims (12)

  1. Un appareil pour réaliser des jonctions par clinchage entre un premier (7) et un deuxième (12) éléments, métalliques ou non métalliques, ledit premier élément (7), au moins à l'emplacement dans lequel la jonction va être réalisée et à proximité de celui-ci, a une géométrie généralement en forme de feuille ou plate, et ledit deuxième élément (12), au même emplacement, a une forme allongée avec un axe longitudinal et une longueur généralement beaucoup plus grande que toute mesure de sa section arbitraire, au moyen d'un outil muni d'un poinçon (1), d'une matrice et enclume (9) coopérantes et d'un organe dit stripper (2) entourant le poinçon (1), caractérisé en ce que la partie d'extrémité du stripper (2) et du poinçon (1) forment un espace allongé et en ce que la dimension du poinçon (1) dans la direction perpendiculaire audit axe longitudinal est essentiellement la même que la dimension de la section dudit deuxième élément (12) audit emplacement.
  2. Un appareil selon la revendication 1, caractérisé par une forme arrondie du poinçon (1) agencée de manière à garantir que le deuxième élément (12) n'est pas découpé de façon à traversante.
  3. Un appareil selon la revendication 1 ou la revendication 2, caractérisé par le fait d'agencer des éléments formant matrice mobiles (10, 100) déplaçables latéralement.
  4. Un appareil selon la revendication 3, caractérisé par le fait d'agencer des bords coopérants (103, 104) sur le poinçon (1) et les éléments formant matrice mobiles (100), respectivement, parallèlement à l'axe du fil agencé pour découper le premier élément (7) de façon traversante.
  5. Un appareil selon l'une quelconque des revendications précédentes, caractérisé par le fait d'agencer le stripper (2) de façon qu'il ait deux moitiés pivotantes (200) avec des arêtes parallèles (15, 16) supérieures et inférieures respectivement, sur l'intérieur des deux moitiés de stripper (200), agencées pour saisir et maintenir le deuxième élément (12), lesdites moitiés pivotantes (200) étant agencées pour pivoter vers l'extérieur à l'encontre de la force d'un élément formant ressort (17) lorsqu'un fil est mis en position.
  6. Un procédé de fabrication de jonctions par clinchage entre un premier (7) et un deuxième (12) éléments, métalliques ou non métalliques, dans lequel ledit premier élément (7), au moins à l'emplacement dans lequel la jonction va être réalisée et à proximité de celui-ci, a une géométrie généralement en forme de feuille ou plate, et ledit deuxième élément (12), au même emplacement, a une forme allongée avec un axe longitudinal et une longueur généralement beaucoup plus grande que toute mesure de sa section arbitraire, par l'utilisation d'un outil muni d'un poinçon (1), d'une matrice et enclume coopérantes (9) et d'un organe dit stripper (2) entourant le poinçon (1), caractérisé par le fait d'utiliser une partie d'extrémité du stripper (2) et du poinçon (1) qui forme un espace allongé et par le fait d'utiliser une dimension du poinçon (1) dans la direction perpendiculaire audit axe longitudinal qui est essentiellement la même que la dimension de la section dudit deuxième élément (12) audit emplacement.
  7. Un procédé selon la revendication 6, caractérisé par le fait d'utiliser une forme arrondie du poinçon (1) pour garantir que le deuxième élément (12) n'est pas découpé de façon à traversante.
  8. Un procédé selon la revendication 6 ou la revendication 7, caractérisé par le fait de presser le deuxième élément (12) par l'intermédiaire du premier élément (7).
  9. Un procédé selon la revendication 6, 7 ou 8, caractérisé par le fait d'utiliser des éléments formant matrice mobiles (10, 100), déplaçables latéralement.
  10. Un procédé selon la revendication 9, caractérisé par le fait d'utiliser des bords coopérants (103, 104) sur le poinçon (1) et les éléments formant matrice mobiles (100), respectivement, parallèles à l'axe du fil pour découper le premier élément (7) de façon traversante.
  11. Un procédé selon l'une quelconque des revendications de procédé précédentes, caractérisé par le fait d'utiliser un stripper (2) ayant deux moitiés pivotantes (200) avec des arêtes supérieures et inférieures (15, 16) parallèles respectivement, sur l'intérieur des deux moitiés de stripper (200) afin de saisir et de maintenir le deuxième élément (12).
  12. Un procédé selon la revendication 8, caractérisé par une étape supplémentaire dans laquelle l'enclume (900) est activée au moyen d'une pression et soulève la partie découpée du premier élément (7) et le deuxième élément partiellement expansé (12) pour les positionner à l'extérieur de la matrice fixe (10), de sorte que le poinçon (1) effectue une deuxième course contre le deuxième élément (12) qui va ensuite s'expanser davantage sur le côté inférieur de la tôle.
EP13758761.4A 2012-08-01 2013-08-01 Procédé de réalisation d'un raccord entre un élément globalement plat, métallique ou non métallique, et un élément allongé tel qu'un fil, et appareil de réalisation dudit procédé Active EP2879817B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE1250903 2012-08-01
PCT/EP2013/066223 WO2014020126A1 (fr) 2012-08-01 2013-08-01 Procédé de réalisation d'un raccord entre un élément globalement plat, métallique ou non métallique, et un élément allongé tel qu'un fil, et appareil de réalisation dudit procédé

Publications (2)

Publication Number Publication Date
EP2879817A1 EP2879817A1 (fr) 2015-06-10
EP2879817B1 true EP2879817B1 (fr) 2020-03-18

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EP13758761.4A Active EP2879817B1 (fr) 2012-08-01 2013-08-01 Procédé de réalisation d'un raccord entre un élément globalement plat, métallique ou non métallique, et un élément allongé tel qu'un fil, et appareil de réalisation dudit procédé

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WO (1) WO2014020126A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11673179B2 (en) 2018-01-24 2023-06-13 Takenobu HONGO Fixing device, fixing method, and structure

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3038958A (en) * 1959-06-08 1962-06-12 Amp Inc Electrical connection
US5155897A (en) * 1989-11-13 1992-10-20 Tech-Line Engineering Co. Leak proof joint and method and apparatus for forming same
WO2010139606A2 (fr) * 2009-06-05 2010-12-09 Attexor Clinch Systems S.A. Procédé de fabrication de joints entre des éléments en forme de feuilles et appareil pour mettre en œuvre ledit procédé

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
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Publication number Publication date
EP2879817A1 (fr) 2015-06-10
WO2014020126A9 (fr) 2014-08-14
WO2014020126A1 (fr) 2014-02-06

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