EP0649355B1 - Improvements relating to tools for cold flow forming of assembly points in sheet metal - Google Patents

Improvements relating to tools for cold flow forming of assembly points in sheet metal Download PDF

Info

Publication number
EP0649355B1
EP0649355B1 EP94916204A EP94916204A EP0649355B1 EP 0649355 B1 EP0649355 B1 EP 0649355B1 EP 94916204 A EP94916204 A EP 94916204A EP 94916204 A EP94916204 A EP 94916204A EP 0649355 B1 EP0649355 B1 EP 0649355B1
Authority
EP
European Patent Office
Prior art keywords
matrix
parts
tool
shell
tools according
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.)
Expired - Lifetime
Application number
EP94916204A
Other languages
German (de)
French (fr)
Other versions
EP0649355A1 (en
Inventor
Jean-Claude Faivre
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.)
HOMAX AG
Original Assignee
HOMAX AG
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 HOMAX AG filed Critical HOMAX AG
Publication of EP0649355A1 publication Critical patent/EP0649355A1/en
Application granted granted Critical
Publication of EP0649355B1 publication Critical patent/EP0649355B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • B21D39/03—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of sheet metal otherwise than by folding
    • B21D39/031—Joining superposed plates by locally deforming without slitting or piercing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/34—Means for forming clench-tongue [eg, for tieband]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/5343—Means to drive self-piercing work part

Definitions

  • the present invention relates to tools for making points assembly of sheets by cold flow.
  • the invention relates to tools for assembling sheets in which is superimposed at least two sheets and, using a punch and a matrix, we realize simultaneously in said sheets, from a face, a cavity, to form on the other side a projection, the cavity of one of the sheets receiving the projection of the other sheet, this so-called cavity forming an enlargement in the vicinity of its bottom, while that the projection, by creep, forms a flaring fitting in enlargement.
  • this clinching assembly we designates this clinching assembly.
  • the matrix is formed of at least two shells which, at one end, cooperate with an anvil while the other end is slidably mounted on a guide surface against the action of elastic means, a stop being provided to limit the spacing of the shells.
  • the elastic means are constituted by an elastomer element enclosing the shells.
  • the stop is generally formed by a sleeve fixed to the body of the second tool.
  • the spacing shells exceeds that originally planned, such as they come up against the elastomer element, they risk to be damaged.
  • One of the aims of the present invention is to remedy these various drawbacks.
  • the invention sees tools for achieving assembly points of sheets by cold creep, said tools comprising a first tool with a punch and a blank holder and a second tool with a guide surface from which to stand a finger terminated by an anvil, matrix formed by, at least two shells, each of said shells having a heel mounted sliding against the guide surface and being applied against the lateral surface of the finger by elastic means, means for guiding the shells being provided as well as a stop limiting the spacing of said shells between them during creep, characterized in that the stopper is made up by two half-carcasses elastically fixed on the second tool.
  • each shell has a groove and the half-carcasses are terminated, on the internal side, by a rim cooperating with the edge of the throat adjacent to the heel to constitute the means for guiding the shells.
  • the elastic means applying the shells against the surface side of the finger are constituted by a tension spring ring-shaped mounted in the bottom of the throat shells.
  • the heel of one at least of the shells comprises, on a face turned in look of the corresponding face of the other shell, a rebate, the guide surface comprising a cooperating stud with said rebate.
  • each half-carcass comprises openings located at the guide surface.
  • each half-carcass comprises means cooperating with means of the second tool to oppose the rotation of said half-carcasses compared to said second tool.
  • the second tool has flats and each carcass of the elastic legs, cut in the lateral surface, intended to cooperate with the flats.
  • each half-carcass has, on its internal face, a stud intended to cooperate with a rebate of the heel of the shells.
  • each angle of the heels being likely to slide, when the spacing of the shells, in corresponding openings of the half-carcasses.
  • FIG 1 there is shown a first tool 1 having a tail 2 intended to be fixed on a jack and having a shoulder 3 and a ferrule 4 between which is inserted a blank holder 5 pierced with an opening 7 crossed by a punch 6.
  • the first tool 1 is intended to cooperate with a second tool 10 comprising a body 11 provided with a groove 12 extended by a projecting ring 13 in the center of which is erected a finger 14 terminated by an anvil 15.
  • the ring 13, on the side of the finger 14, is perfectly upright and has a guide surface 16, a stud 17 protruding from this guide surface 16.
  • a matrix 20 is formed by four shells 18 having, at one end, a large bearing surface 19 and, at the other end, a heel 21 intended to cooperate with the guide surface 16, each heel 21 having, on one of its edges intended to be turned towards the corresponding edge another shell, a rebate 22, the depth corresponds to the thickness of the nipple 17.
  • a wide groove 24 with a groove 25 intended receiving a tension spring 26 in the form of a ring.
  • a stop constituted by two half-carcasses 30 having, at one end, and on the internal side a bead 31 intended to be inserted in the groove 12, the bead 31 being connected to the surface internal lateral 35 by shoulder 34, opposite end to that provided with the bead 31 being terminated by a flange 36 coming to be located opposite the groove 24 above heels 21.
  • a groove 32 intended to receive a toroidal tension spring 33.
  • the side wall of the half-carcasses 30, in its part located in line with the guide surface 16, comprises openings 37 allowing the filings to be eliminated, for example, by sending a jet of compressed air.
  • the tool When we want to make an assembly point on two sheet metal blanks 40 and 41, the tool is lowered 1 so that said blanks are blocked between the blank holder 5 and the bearing surface 19. It will be noted that the latter has a relatively large surface which has the advantage, in particular, for aluminum blanks, to avoid the marking of said blanks.
  • Punch 6 is then engaged in the blank 40 and forms a cavity in the latter and the blank 41.
  • the shells 20 which constitute the matrix are kept assembled by the spring 26, when the sheet blanks 40 and 41 are pinched between the anvil 15 and the punch 6, the shells move apart elastically, thus it forms, by creep, in the vicinity of the bottom of the cavities, enlargements which provide a connection internal between the blanks.
  • a space is provided between the edges 36 and the bottom grooves 24 as well as between the lateral edge of the heels 21 and the internal lateral wall of the half-carcasses 30. This space constituting the stroke necessary to allow shells 20 to realize the assembly point. However, if for some reason the stroke increases, the half-carcasses 30 can deviate elastically which avoids tools may be damaged.
  • Figures 3, 4 and 5 show an embodiment more particularly intended to be used for the formation of assembly points in blanks having significant thickness.
  • the race of the shells constituting the matrix is important and one is obliged to provide a stop limiting the stroke relatively cumbersome. This embodiment overcomes this drawback.
  • Figure 3 there is shown, in perspective exploded, a second tool designated by the general reference 40. Of course this is combined with a first tool such as tool 1 and it is not represented on these Figures 3, 4 and 5.
  • the second tool 40 comprises a body 41 provided a groove 42 extended by a projecting ring 43 in the center of which stands a finger 44 ending in a anvil 45, the surface of the ring 43, turned towards the side of the finger 44, constitutes a guide surface 46 for the heels 47 of shells 48.
  • the ring 43 comprises, offset by 180 °, two flats 50.
  • the shells 48 are four in number and each have an end opposite to the heel 47, a large bearing surface 52, and between these two elements laterally a groove 53, each heel 47 comprising a rebate 54.
  • the four heels 47 form a square and have each an angle 55.
  • a tension spring O-ring 57 which assembles the shells 48 between them.
  • a formed stop two half-carcasses which have laterally, in the vicinity at one end, a groove 61 into which is inserted a toric spring 62 ensuring their assembly.
  • the half-carcasses 60 In line with throat 61 on the internal face the half-carcasses 60 have a bead 63 which is inserted in the throat 42, while in the side wall internal 64 are cut two elastic tabs 65 intended to be worn against the flats 50 so that the half-carcasses 60 cannot pivot relative to the body 41.
  • Each half-carcass 60 has two openings oblong 67 and, disposed between said openings, a nipple 68.
  • the nipples 68 fit into the rebates 54 and thus oppose to the rotation of the matrix relative to the body 41.
  • This arrangement allows the shells 48 to have relatively large travel without increasing the bulk half-carcasses 60.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Tyre Moulding (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)

Abstract

Improvements relating to tools for cold flow forming of assembly points in sheet metal. The tools comprise a first tool (1) with a punch (6) and a blank holder (5) and a second tool (10) with a guiding surface (16) from which extends a finger (14) terminated by an anvil (15), a die (20) formed by at least two shells (18), each of said shells (18) having a shoulder (21) slidingly mounted on the guiding surface (16) and in contact with the lateral surface of the finger (14) through resilient means (26), the guiding means of the sections (18) being provided together with a stop restricting the separation of the shells (18) during cold flow. The improvements are characterized in that the stop consists of two half sections (30) elastically secured to the second tool (10).

Description

La présente invention se rapporte à des outils pour la réalisation de points d'assemblage de tôles par fluage à froid.The present invention relates to tools for making points assembly of sheets by cold flow.

L'invention concerne des outils pour l'assemblage de tôles dans lequel on superpose au moins deux tôles et, à l'aide d'un poinçon et d'une matrice, on réalise simultanément dans lesdites tôles, à partir d'une face, une cavité, pour former sur l'autre face une saillie, la cavité de l'une des tôles recevant la saillie de l'autre tôle, cette dite cavité formant un élargissement au voisinage de son fond, tandis que la saillie, par fluage, forme un évasement s'insérant dans l'élargissement. Dans le langage technique, on désigne cet assemblage par clinchage.The invention relates to tools for assembling sheets in which is superimposed at least two sheets and, using a punch and a matrix, we realize simultaneously in said sheets, from a face, a cavity, to form on the other side a projection, the cavity of one of the sheets receiving the projection of the other sheet, this so-called cavity forming an enlargement in the vicinity of its bottom, while that the projection, by creep, forms a flaring fitting in enlargement. In technical language, we designates this clinching assembly.

Dans la technique antérieure, on connaít des outils dans lesquels, la matrice est formée d'au moins deux coquilles qui, à une extrémité, coopère avec une enclume tandis que l'autre extrémité est montée glissante sur une surface de guidage contre l'action de moyens élastiques, une butée étant prévue pour limiter l'écartement des coquilles. Généralement, les moyens élastiques sont constitués par un élément en élastomère enserrant les coquilles.In the prior art, there are known tools in which the matrix is formed of at least two shells which, at one end, cooperate with an anvil while the other end is slidably mounted on a guide surface against the action of elastic means, a stop being provided to limit the spacing of the shells. Generally, the elastic means are constituted by an elastomer element enclosing the shells.

Une telle disposition présente un certain nombre d'inconvénients. Lors du fluage, il se forme obligatoirement des limailles qu'il est difficile d'évacuer, celles-ci restant adhérantes à l'élément en élastomère.Such an arrangement presents a number disadvantages. During creep, it must form filings that are difficult to evacuate, these remaining adherent to the elastomer element.

De plus, la butée est en générale formée par un manchon fixé au corps du second outil. Cette disposition présente plusieurs inconvénients. Elle nécessite de prévoir dans les coquilles des moyens de guidage ce qui forme, dans certaines parties, des affaiblissements avec le risque de casse desdites coquilles. In addition, the stop is generally formed by a sleeve fixed to the body of the second tool. This provision has several drawbacks. It requires provide in the shells for guide means which forms, in some parts, impairments with the risk of breakage of said shells.

De plus, si pour une raison quelconque, l'écartement des coquilles dépasse celui prévu initialement, comme elles butent sur l'élément en élastomère, elles risquent d'être endommagées.In addition, if for any reason, the spacing shells exceeds that originally planned, such as they come up against the elastomer element, they risk to be damaged.

Enfin, le montage et le démontage de la matrice n'est pas très aisé et demande un certain temps. Un autre dispositif comprenant des outils conforment au préambule de la revendication 1, est montré dans figures 19 à 22 de US-A-5051020Finally, the assembly and disassembly of the matrix is not very easy and takes some time. Another device comprising tools conform to the preamble of claim 1, is shown in Figures 19-22 of US-A-5051020

L'un des buts de la présente invention est de remédier à ces divers inconvénients.One of the aims of the present invention is to remedy these various drawbacks.

L'invention, voit des outils pour la réalisation de points d'assemblage de tôles par fluage à froid, lesdits outils comprenant un premier outil avec un poinçon et un serre-flan et un second outil avec une surface de guidage à partir de laquelle s'érige un doigt terminé par une enclume, matrice formée par, au moins, deux coquilles, chacune desdites coquilles présentant un talon monté glissant contre la surface de guidage et étant appliqué contre la surface latérale du doigt par des moyens élastiques, des moyens de guidage des coquilles étant prévus ainsi qu'une butée limitant l'écartement desdites coquilles entre elles lors du fluage, caractérisés en ce que la butée est constituée par deux demi-carcasses fixées élastiquement sur le second outil.The invention sees tools for achieving assembly points of sheets by cold creep, said tools comprising a first tool with a punch and a blank holder and a second tool with a guide surface from which to stand a finger terminated by an anvil, matrix formed by, at least two shells, each of said shells having a heel mounted sliding against the guide surface and being applied against the lateral surface of the finger by elastic means, means for guiding the shells being provided as well as a stop limiting the spacing of said shells between them during creep, characterized in that the stopper is made up by two half-carcasses elastically fixed on the second tool.

Suivant une variante de réalisation de l'invention la paroi latérale de chaque coquille comporte une gorge et les demi-carcasses sont terminées, du côté interne, par un rebord coopérant avec le bord de la gorge adjacent au talon pour constituer les moyens de guidage des coquilles.According to an alternative embodiment of the invention, the wall side of each shell has a groove and the half-carcasses are terminated, on the internal side, by a rim cooperating with the edge of the throat adjacent to the heel to constitute the means for guiding the shells.

Suivant encore une autre forme de l'invention les moyens élastiques appliquant les coquilles contre la surface latérale du doigt sont constitués par un ressort de traction en forme d'anneau monté dans le fond de la gorge des coquilles.According to yet another form of the invention, the elastic means applying the shells against the surface side of the finger are constituted by a tension spring ring-shaped mounted in the bottom of the throat shells.

De préférence, des moyens s'opposant à la rotation des coquilles par rapport audit second outil sont prévus. Preferably means opposing the rotation shells relative to said second tool are provided.

Suivant un détail constructif, le talon de l'une au moins des coquilles comporte, sur une face tournée en regard de la face correspondante de l'autre coquille, une feuillure, la surface de guidage comportant un téton coopérant avec ladite feuillure.According to a constructive detail, the heel of one at least of the shells comprises, on a face turned in look of the corresponding face of the other shell, a rebate, the guide surface comprising a cooperating stud with said rebate.

De préférence, chaque demi-carcasse comporte des ouvertures situées au niveau de la surface de guidage.Preferably, each half-carcass comprises openings located at the guide surface.

Suivant une variante de réalisation, chaque demi-carcasse comporte des moyens coopérant avec des moyens du second outil pour s'opposer à la rotation desdites demi-carcasses par rapport audit second outil.According to an alternative embodiment, each half-carcass comprises means cooperating with means of the second tool to oppose the rotation of said half-carcasses compared to said second tool.

Suivant un détail constructif, le second outil comporte des méplats et chaque carcasse des pattes élastiques, découpées dans la surface latérale, destinées à coopérer avec les méplats.According to a constructive detail, the second tool has flats and each carcass of the elastic legs, cut in the lateral surface, intended to cooperate with the flats.

Suivant encore une variante de réalisation, chaque demi-carcasse comporte, sur sa face interne, un téton destiné à coopérer avec une feuillure du talon des coquilles.According to yet another variant embodiment, each half-carcass has, on its internal face, a stud intended to cooperate with a rebate of the heel of the shells.

Enfin, les coquilles sont au nombre de quatre et le talon forme un carré, chaque angle destits talons étant susceptible de coulisser, lors de l'écartement des coquilles, dans des ouvertures correspondantes des demi-carcasses. Finally, there are four shells and the heel forms a square, each angle of the heels being likely to slide, when the spacing of the shells, in corresponding openings of the half-carcasses.

L'invention va maintenant être décrite avec plus de détails en se référant à des modes de réalisation particuliers donnés à titre d'exemple seulement et représentés aux dessins annexés, dans lesquels :

  • Figure 1 est une vue schématique en coupe montrant un poinçon et une matrice,
  • Figure 2 est une vue en perspective éclatée montrant une forme de réalisation de l'invention.
  • Figure 3 est une vue en perspective éclatée d'une variante de réalisation de l'invention.
  • Figure 4 est une vue en coupe suivant la ligne 4-4 de la figure 5.
  • Figure 5 est une vue en coupe suivant la ligne 5-5 de la figure 4.
    • The invention will now be described in more detail with reference to particular embodiments given by way of example only and shown in the accompanying drawings, in which:
  • FIG. 1 is a schematic sectional view showing a punch and a die,
  • Figure 2 is an exploded perspective view showing an embodiment of the invention.
  • Figure 3 is an exploded perspective view of an alternative embodiment of the invention.
  • Figure 4 is a sectional view along line 4-4 of Figure 5.
  • Figure 5 is a sectional view along line 5-5 of Figure 4.

    • A la figure 1, on a représenté un premier outil 1 présentant une queue 2 destinée à être fixée sur un vérin et comportant un épaulement 3 et une virole 4 entre lesquels est inséré un serre-flan 5 percé d'une ouverture 7 traversée par un poinçon 6.In Figure 1, there is shown a first tool 1 having a tail 2 intended to be fixed on a jack and having a shoulder 3 and a ferrule 4 between which is inserted a blank holder 5 pierced with an opening 7 crossed by a punch 6.

    Le premier outil 1 est destiné à coopérer avec un second outil 10 comprenant un corps 11 pourvu d'une gorge 12 prolongée par une bague en saillie 13 au centre de laquelle s'érige un doigt 14 terminé par une enclume 15.The first tool 1 is intended to cooperate with a second tool 10 comprising a body 11 provided with a groove 12 extended by a projecting ring 13 in the center of which is erected a finger 14 terminated by an anvil 15.

    La bague 13, du côté du doigt 14, est parfaitement dressée et présente une surface de guidage 16, un téton 17 faisant saillie sur cette surface de guidage 16.The ring 13, on the side of the finger 14, is perfectly upright and has a guide surface 16, a stud 17 protruding from this guide surface 16.

    Une matrice 20 est formée de quatre coquilles 18 présentant, à une extrémité, une large surface d'appui 19 et, à l'autre extrémité, un talon 21 destiné à coopérer avec la surface de guidage 16, chaque talon 21 présentant, sur un de ses bords destiné à être tourné vers le bord correspondant d'une autre coquille, une feuillure 22 dont la profondeur correspond à l'épaisseur du téton 17.A matrix 20 is formed by four shells 18 having, at one end, a large bearing surface 19 and, at the other end, a heel 21 intended to cooperate with the guide surface 16, each heel 21 having, on one of its edges intended to be turned towards the corresponding edge another shell, a rebate 22, the depth corresponds to the thickness of the nipple 17.

    Entre le talon et la surface d'appui 19 est ménagée une large gorge 24 avec une rainure 25 destinée à recevoir un ressort de traction 26 en forme d'anneau. Between the heel and the bearing surface 19 is formed a wide groove 24 with a groove 25 intended receiving a tension spring 26 in the form of a ring.

    Sur le corps 11 est montée une butée constituée par deux demi-carcasses 30 présentant, à une extrémité, et du côté interne un bourrelet 31 destiné à s'insérer dans la gorge 12, le bourrelet 31 étant raccordé à la surface latérale interne 35 par épaulement 34, l'extrémité opposée à celle pourvue du bourrelet 31 étant terminée par un rebord 36 venant se situer en regard de la gorge 24 au-dessus des talons 21.On the body 11 is mounted a stop constituted by two half-carcasses 30 having, at one end, and on the internal side a bead 31 intended to be inserted in the groove 12, the bead 31 being connected to the surface internal lateral 35 by shoulder 34, opposite end to that provided with the bead 31 being terminated by a flange 36 coming to be located opposite the groove 24 above heels 21.

    Au droit du bourrelet 31, il est prévu, à la surface extérieure, une rainure 32 destinée à recevoir un ressort de traction torique 33.To the right of the bead 31, it is provided, at the outer surface, a groove 32 intended to receive a toroidal tension spring 33.

    La paroi latérale des demi-carcasses 30, dans sa partie située au droit de la surface de guidage 16, comporte des ouvertures 37 permettant d'éliminer les limailles, par exemple, par l'envoi d'un jet d'air comprimé.The side wall of the half-carcasses 30, in its part located in line with the guide surface 16, comprises openings 37 allowing the filings to be eliminated, for example, by sending a jet of compressed air.

    Lorsqu'on veut réaliser un point d'assemblage sur deux flans de tôle 40 et 41, on fait descendre l'outil 1 de manière que lesdits flans soient bloqués entre le serre-flan 5 et la surface d'appui 19. On remarquera que cette dernière présente une surface relativement importante ce qui a l'avantage, notamment, pour des flans d'aluminium, d'éviter le marquage desdits flans. Le poinçon 6 est ensuite engagé dans le flan 40 et forme une cavité dans ce dernier et le flan 41. Comme les coquilles 20 qui constituent la matrice sont maintenues assemblées par le ressort 26, lorsque les flans de tôles 40 et 41 sont pincés entre l'enclume 15 et le poinçon 6, les coquilles s'écartent élastiquement, ainsi il se forme, par fluage, au voisinage du fond des cavités, des élargissements qui assurent une liaison interne entre les flans.When we want to make an assembly point on two sheet metal blanks 40 and 41, the tool is lowered 1 so that said blanks are blocked between the blank holder 5 and the bearing surface 19. It will be noted that the latter has a relatively large surface which has the advantage, in particular, for aluminum blanks, to avoid the marking of said blanks. Punch 6 is then engaged in the blank 40 and forms a cavity in the latter and the blank 41. Like the shells 20 which constitute the matrix are kept assembled by the spring 26, when the sheet blanks 40 and 41 are pinched between the anvil 15 and the punch 6, the shells move apart elastically, thus it forms, by creep, in the vicinity of the bottom of the cavities, enlargements which provide a connection internal between the blanks.

    Le téton 17, en coopérant avec une feuillure 22, s'oppose à la rotation de la matrice. On remarquera qu'un espace est ménagé entre les rebords 36 et le fond des gorges 24 ainsi qu'entre le bord latéral des talons 21 et la paroi latérale interne des demi-carcasses 30. Cet espace constituant la course nécessaire pour permettre aux coquilles 20 de réaliser le point d'assemblage. Toutefois, si pour une raison quelconque la course augmente, les demi-carcasses 30 peuvent s'écarter élastiquement ce qui évite que les outils risquent d'être endommagés.The pin 17, cooperating with a rebate 22, opposes the rotation of the matrix. We will notice a space is provided between the edges 36 and the bottom grooves 24 as well as between the lateral edge of the heels 21 and the internal lateral wall of the half-carcasses 30. This space constituting the stroke necessary to allow shells 20 to realize the assembly point. However, if for some reason the stroke increases, the half-carcasses 30 can deviate elastically which avoids tools may be damaged.

    Les figures 3, 4 et 5 montrent un mode de réalisation plus particulièrement destiné à être utilisé pour la formation de points d'assemblage dans des flans ayant une épaisseur importante. Dans ce cas, la course des coquilles constituant la matrice est importante et on est obligé de prévoir une butée limitant la course relativement encombrante. Ce mode de réalisation remédie à cet inconvénient.Figures 3, 4 and 5 show an embodiment more particularly intended to be used for the formation of assembly points in blanks having significant thickness. In this case, the race of the shells constituting the matrix is important and one is obliged to provide a stop limiting the stroke relatively cumbersome. This embodiment overcomes this drawback.

    A la figure 3 on a représenté, en perspective éclatée, un second outil désigné par la référence générale 40 . Bien entendu celui-ci est combiné avec un premier outil tel que l'outil 1 et il n'est pas réprésenté sur ces figures 3, 4 et 5.In Figure 3 there is shown, in perspective exploded, a second tool designated by the general reference 40. Of course this is combined with a first tool such as tool 1 and it is not represented on these Figures 3, 4 and 5.

    Le second outil 40 comprend un corps 41 pourvu d'une gorge 42 prolongée par une bague en saillie 43 au centre de laquelle s'érige un doigt 44 terminé par une enclume 45, la surface de la bague 43, tournée du côté du doigt 44, constitue une surface de guidage 46 pour les talons 47 de coquilles 48.The second tool 40 comprises a body 41 provided a groove 42 extended by a projecting ring 43 in the center of which stands a finger 44 ending in a anvil 45, the surface of the ring 43, turned towards the side of the finger 44, constitutes a guide surface 46 for the heels 47 of shells 48.

    La bague 43 comporte, décalée de 180°, deux méplats 50.The ring 43 comprises, offset by 180 °, two flats 50.

    Les coquilles 48 sont au nombre de quatre et présentent, chacune, à une extrémité opposée au talon 47, une large surface d'appui 52, et entre ces deux éléments latéralement une gorge 53, chaque talon 47 comportant une feuillure 54.The shells 48 are four in number and each have an end opposite to the heel 47, a large bearing surface 52, and between these two elements laterally a groove 53, each heel 47 comprising a rebate 54.

    Les quatre talons 47 forment un carré et présentent chacun un angle 55.The four heels 47 form a square and have each an angle 55.

    Dans la gorge 53 est logé un ressort de traction torique 57 qui assure l'assemblage des coquilles 48 entre elles. In the groove 53 is housed a tension spring O-ring 57 which assembles the shells 48 between them.

    Sur le corps 41 est montée une butée formée de deux demi-carcasses qui comportent latéralement, au voisinage d'une extrémité, une gorge 61 dans laquelle s'insère un ressort torique 62 assurant leur assemblage.On the body 41 is mounted a formed stop two half-carcasses which have laterally, in the vicinity at one end, a groove 61 into which is inserted a toric spring 62 ensuring their assembly.

    Au droit de la gorge 61 sur la face interne les demi-carcasses 60 comportent un bourrelet 63 qui s'insère dans la gorge 42, tandis que dans la paroi latérale interne 64 sont découpées deux pattes élastiques 65 destinées à porter contre les méplats 50 de sorte que les demi-carcasses 60 ne peuvent pivoter par rapport au corps 41.In line with throat 61 on the internal face the half-carcasses 60 have a bead 63 which is inserted in the throat 42, while in the side wall internal 64 are cut two elastic tabs 65 intended to be worn against the flats 50 so that the half-carcasses 60 cannot pivot relative to the body 41.

    Chaque demi-carcasse 60 présente deux ouvertures oblongues 67 et, disposé entre lesdites ouvertures, un téton 68.Each half-carcass 60 has two openings oblong 67 and, disposed between said openings, a nipple 68.

    Comme on le voit aux figures 4 et 5, les tétons 68 s'insèrent dans les feuillures 54 et s'opposent ainsi à la rotation de la matrice par rapport au corps 41.As seen in Figures 4 and 5, the nipples 68 fit into the rebates 54 and thus oppose to the rotation of the matrix relative to the body 41.

    Lorsqu'on réalise le point d'assemblage, les talons 47 des coquilles 48 glissent sur la surface 46 contre l'action du ressort 57 et les angles 55 traversent les ouvertures 67.When carrying out the assembly point, the heels 47 shells 48 slide on the surface 46 against the action of the spring 57 and the angles 55 pass through the openings 67.

    Cette disposition permet aux coquilles 48 d'avoir un débattement relativement important sans augmenter l'encombrement des demi-carcasses 60.This arrangement allows the shells 48 to have relatively large travel without increasing the bulk half-carcasses 60.

    Claims (10)

    1. Tools for creating joints between sheet metal by means of cold forming, comprising a first tool (1) with a punch (6) and a side pressing element (5) and a second tool (10) provided with a support surface (16) from which a pin (14) terminated by an anvil (15) erects, a matrix (20) comprising at least two matrix-parts (18), each said matrix-part (18) comprising a heel (21) arranged sliding against said support surface (16) and being applied against the lateral surface of the pin (14) by means of elastic means (26), means for guiding the matrix-parts (18) being provided as well as a stop means limiting the mutual lateral displacement of said matrix-parts (18) during the forming characterised in that the stop means comprises two shell-formed parts (30) fixed elastically on said second tool (10).
    2. Tools according to claim 1, characterised in that the lateral wall of each matrix-part (18) is provided with a waist (24) and the shell-formed parts (30) are terminated on the inside by a flange (36) co-operating with the edge of the waist close to the heel, in order to constitute guiding means for the matrix-parts (18).
    3. Tools according to claims 1 and 2, characterised in that the elastic means which applies the matrix-parts (18) against the lateral surface of the pin (14) are constituted by a spring (26) in the form of a ring arranged at the bottom of the waist (24) of the matrix-parts.
    4. Tools according to claim 1, characterised in that means (17) for preventing the rotation of the matrix-parts (18) in relation to said second tool (10) are provided.
    5. Tools according to claim 4, characterised in that the heel (21) of at least one of the matrix-parts (18) is provided on a surface turned in the direction of the corresponding surface on the other matrix-part (18) with a notch (22) and that the support surface (16) is provided with a dowel co-operating with said notch.
    6. Tools according to claim 1, characterised in that each shell-formed part (30) is provided with openings (37) at a level corresponding to the support surface.
    7. Tools according to claim 1, characterised in that each shell-formed part (60) comprises means (65) co-operating with means (50) on the second tool (40) for preventing rotational movement of said shell-formed parts (60) in relation to said second tool (40).
    8. Tools according to claim 7, characterised in that the second tool (40) is provided with lateral flat surfaces (50) and that each shell-formed part at its lateral inner surface is provided with elastic means (65) arranged to co-operate with said flat surfaces.
    9. Tools according to claim 1, 4 and 7, characterised in that each shell-formed part (60) is provided with a dowel (68) on its inner surface arranged to co-operate with a notch (54) in the heel (47) of the matrix-parts (48).
    10. Tools according to claim 1, characterised in that the number of matrix-parts (48) is four, and that the heel (47) is formed with a 90° corner and each of said corners (55) on said heels is arranged to slide, during the movement of the matrix-parts (48), into corresponding openings (67) in the shell-formed parts (60).
    EP94916204A 1993-05-04 1994-04-29 Improvements relating to tools for cold flow forming of assembly points in sheet metal Expired - Lifetime EP0649355B1 (en)

    Applications Claiming Priority (3)

    Application Number Priority Date Filing Date Title
    FR9305297A FR2704785B1 (en) 1993-05-04 1993-05-04 Improvements to tools for the realization of assembly points of sheets by cold creep.
    FR9305297 1993-05-04
    PCT/EP1994/001445 WO1994025196A1 (en) 1993-05-04 1994-04-29 Improvements relating to tools for cold flow forming of assembly points in sheet metal

    Publications (2)

    Publication Number Publication Date
    EP0649355A1 EP0649355A1 (en) 1995-04-26
    EP0649355B1 true EP0649355B1 (en) 1998-01-21

    Family

    ID=9446727

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP94916204A Expired - Lifetime EP0649355B1 (en) 1993-05-04 1994-04-29 Improvements relating to tools for cold flow forming of assembly points in sheet metal

    Country Status (8)

    Country Link
    US (1) US5509290A (en)
    EP (1) EP0649355B1 (en)
    JP (1) JPH08503893A (en)
    AU (1) AU6796394A (en)
    DE (1) DE69408080T2 (en)
    ES (1) ES2114689T3 (en)
    FR (1) FR2704785B1 (en)
    WO (1) WO1994025196A1 (en)

    Cited By (2)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US8042370B2 (en) 2006-02-07 2011-10-25 Ronjo, Llc Flow formed gear
    DE102018218949A1 (en) 2018-11-07 2020-05-07 Volkswagen Aktiengesellschaft Filter module

    Families Citing this family (18)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US5479687A (en) * 1994-01-31 1996-01-02 Btm Corporation Apparatus for joining sheets of material
    US5860315A (en) * 1994-07-29 1999-01-19 Etm Corporation Device for securing tools
    SE9502587D0 (en) * 1995-07-11 1995-07-11 Attexor Equip A tool for making joints between sheet-formed members
    US5782130A (en) * 1997-01-27 1998-07-21 Btm Corporation Apparatus for retaining tools
    SE9904167D0 (en) * 1999-11-16 1999-11-16 Attexor Equip Atool for joining two or several overlaying sheet formed members
    US20040045153A1 (en) * 2000-04-05 2004-03-11 Eugen Rapp Method and tool for producing a press joint connection
    US7150086B2 (en) * 2001-04-04 2006-12-19 Eugen Rapp Tool that connects pieces through a process of riveting
    US6785959B2 (en) * 2002-08-15 2004-09-07 Btm Corporation Tool assembly employing a flexible retainer
    DE10318060A1 (en) * 2003-04-17 2004-11-18 Eckold Gmbh & Co Kg Die for a tool set for mechanical joining
    US7694399B2 (en) * 2005-03-04 2010-04-13 Btm Corporation Sheet fastening apparatus and method
    DE102006024112A1 (en) * 2006-05-19 2007-11-22 Eckold Gmbh & Co Kg Die for mechanical joining
    US8650730B2 (en) * 2009-02-23 2014-02-18 Btm Corporation Clinching tool
    SE0900538A1 (en) * 2009-04-22 2010-05-25 Hans Bergkvist Apparatus for joining two or more overlapping material parts and method for manufacturing the apparatus
    US20130042450A1 (en) * 2011-08-15 2013-02-21 Hans R. Bergkvist Apparatus for joining two or more overlapping material members and method for manufacturing of the apparatus
    CN102319809B (en) * 2011-10-11 2013-07-31 苏州托克斯冲压设备有限公司 Metal plate cutting and stamping point connecting mould and connecting method
    WO2015063333A1 (en) * 2013-11-04 2015-05-07 Attexor Clinch Systems S.A. Tool for making joints of clinch type
    US10328481B2 (en) 2014-03-18 2019-06-25 Btm Company Llc Clinching punch and apparatus
    US10197183B2 (en) 2015-02-12 2019-02-05 Fisher Controls International Llc Valve stem and plug connections and staking tools

    Family Cites Families (13)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US2924312A (en) * 1954-11-29 1960-02-09 Ivan A Williams Punch and die assembly for making interlocking integral fasteners
    US4208776A (en) * 1977-09-15 1980-06-24 Schleicher Louis C Punch, die and anvil set
    US4757609A (en) * 1980-09-08 1988-07-19 Btm Corporation Apparatus for joining sheet material
    US5208974A (en) * 1980-09-08 1993-05-11 Btm Corporation Apparatus for attaching a fastener to sheet material
    DE3575386D1 (en) * 1984-03-22 1990-02-22 Eckold Vorrichtung ENFORCEMENT PROCEDURE.
    US5131258A (en) * 1985-06-03 1992-07-21 Btm Corporation Punch anvils for sheet fastening systems
    US5207086A (en) * 1985-06-03 1993-05-04 Btm Corporation Punch anvils for sheet fastening systems
    US5031442A (en) * 1985-06-03 1991-07-16 Btm Corporation Punch anvils for sheet fastening systems
    US4660403A (en) * 1985-12-19 1987-04-28 Weldex, Inc. Die assembly
    US4825525A (en) * 1986-08-29 1989-05-02 Obrecht Robert E Clinching tool
    DE3923182A1 (en) * 1989-07-13 1991-01-24 Fraunhofer Ges Forschung Joining metal sheets together - involves punch and undercut die to cause sheets to interlock
    US5051020A (en) * 1989-11-13 1991-09-24 Tech-Line Engineering Co. Leak proof joint
    US5230136A (en) * 1992-05-04 1993-07-27 Savair Inc. Punch and die set for sheet metal clinching

    Cited By (3)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US8042370B2 (en) 2006-02-07 2011-10-25 Ronjo, Llc Flow formed gear
    DE102018218949A1 (en) 2018-11-07 2020-05-07 Volkswagen Aktiengesellschaft Filter module
    DE102018218949B4 (en) 2018-11-07 2023-02-16 Volkswagen Aktiengesellschaft filter module, cleaning system and vehicle

    Also Published As

    Publication number Publication date
    US5509290A (en) 1996-04-23
    ES2114689T3 (en) 1998-06-01
    WO1994025196A1 (en) 1994-11-10
    FR2704785A1 (en) 1994-11-10
    FR2704785B1 (en) 1995-07-21
    DE69408080D1 (en) 1998-02-26
    JPH08503893A (en) 1996-04-30
    DE69408080T2 (en) 1998-08-06
    AU6796394A (en) 1994-11-21
    EP0649355A1 (en) 1995-04-26

    Similar Documents

    Publication Publication Date Title
    EP0649355B1 (en) Improvements relating to tools for cold flow forming of assembly points in sheet metal
    EP1151204B1 (en) Device for assembling two panels or the like and formed by two co-operating parts
    FR2568978A1 (en) Device for connecting the ends of sheet-metal sheaths and corner connector for this device
    EP1213980A1 (en) Device for locking in position a mobile part relative to a fixed part
    EP0034078A1 (en) Multidirectional connecting system for structures
    EP3670988B1 (en) Clamping device comprising a belt and a sealing ring
    EP1436530B1 (en) Differential and method for assembling said differential
    EP1136010B1 (en) Articulated bracelet, particularly for watches
    FR2732445A1 (en) Synthetic resin ferrule for lubricating pump
    EP1702693B1 (en) Tool chuck for a rotating machine
    EP0743123B1 (en) Fluid box of an heat exchanger and method for producing the same
    EP3580486B1 (en) Device for coupling two tubes with pre-assembly
    WO1999004306A1 (en) Elastic hinge for flat spectacle bow
    CA2236542A1 (en) Device for assembling a clamping jaw
    EP0099806B1 (en) Heat exchanger with tubes locked to the tube end plate
    FR2687745A1 (en) DEVICE FOR JOINING ONE AGAINST THE OTHER TWO RIGID PLATES.
    FR3046986A1 (en) EASY-ASSEMBLED PEDAL STRUCTURE
    EP3795877B1 (en) Clamping collar
    EP0738480B1 (en) Articulation device for connecting bracelet links
    EP1075198B1 (en) Bracelet
    EP3505779B1 (en) Sheet metal plate, having a non-welded screw
    EP0657232B1 (en) Spot connection of sheets by cold extrusion and tools for producing this connection
    FR2823264A1 (en) Device for fixing part on support comprises insert, forced into support opening, and locking rod passing through insert head which separates insert branches
    EP0664170B1 (en) Improvements on tools for making point connections of plates
    FR2715365A1 (en) Windscreen wiper pivot assembly for vehicle

    Legal Events

    Date Code Title Description
    PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

    Free format text: ORIGINAL CODE: 0009012

    17P Request for examination filed

    Effective date: 19950202

    AK Designated contracting states

    Kind code of ref document: A1

    Designated state(s): DE ES GB IT NL SE

    GRAG Despatch of communication of intention to grant

    Free format text: ORIGINAL CODE: EPIDOS AGRA

    17Q First examination report despatched

    Effective date: 19970312

    GRAG Despatch of communication of intention to grant

    Free format text: ORIGINAL CODE: EPIDOS AGRA

    GRAH Despatch of communication of intention to grant a patent

    Free format text: ORIGINAL CODE: EPIDOS IGRA

    GRAH Despatch of communication of intention to grant a patent

    Free format text: ORIGINAL CODE: EPIDOS IGRA

    GRAA (expected) grant

    Free format text: ORIGINAL CODE: 0009210

    AK Designated contracting states

    Kind code of ref document: B1

    Designated state(s): DE ES GB IT NL SE

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: NL

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 19980121

    REF Corresponds to:

    Ref document number: 69408080

    Country of ref document: DE

    Date of ref document: 19980226

    ITF It: translation for a ep patent filed

    Owner name: CONCESSA PROROGA DI 6 MESI A PARTIRE DA:;BARZANO'

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: SE

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 19980421

    REG Reference to a national code

    Ref country code: ES

    Ref legal event code: FG2A

    Ref document number: 2114689

    Country of ref document: ES

    Kind code of ref document: T3

    GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

    Effective date: 19980522

    NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
    PLBE No opposition filed within time limit

    Free format text: ORIGINAL CODE: 0009261

    STAA Information on the status of an ep patent application or granted ep patent

    Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

    26N No opposition filed
    REG Reference to a national code

    Ref country code: GB

    Ref legal event code: IF02

    PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

    Ref country code: GB

    Payment date: 20020829

    Year of fee payment: 9

    PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

    Ref country code: DE

    Payment date: 20020904

    Year of fee payment: 9

    PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

    Ref country code: ES

    Payment date: 20020927

    Year of fee payment: 9

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: GB

    Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

    Effective date: 20030429

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: ES

    Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

    Effective date: 20030430

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: DE

    Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

    Effective date: 20031101

    GBPC Gb: european patent ceased through non-payment of renewal fee
    REG Reference to a national code

    Ref country code: ES

    Ref legal event code: FD2A

    Effective date: 20030430

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: IT

    Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

    Effective date: 20050429