EP0268534A1 - Die for a press tool for guiding and positioning a profile in order to punch it - Google Patents

Die for a press tool for guiding and positioning a profile in order to punch it Download PDF

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Publication number
EP0268534A1
EP0268534A1 EP87402603A EP87402603A EP0268534A1 EP 0268534 A1 EP0268534 A1 EP 0268534A1 EP 87402603 A EP87402603 A EP 87402603A EP 87402603 A EP87402603 A EP 87402603A EP 0268534 A1 EP0268534 A1 EP 0268534A1
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EP
European Patent Office
Prior art keywords
section
guide
stirrup
bar
guide element
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.)
Granted
Application number
EP87402603A
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German (de)
French (fr)
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EP0268534B1 (en
Inventor
Robert Clauzet
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.)
Alcan France SA
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Technal SA
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Publication date
Application filed by Technal SA filed Critical Technal SA
Publication of EP0268534A1 publication Critical patent/EP0268534A1/en
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Publication of EP0268534B1 publication Critical patent/EP0268534B1/en
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    • 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
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/24—Perforating, i.e. punching holes
    • B21D28/243—Perforating, i.e. punching holes in profiles

Definitions

  • the invention relates to a matrix allowing the guiding and positioning of a profile for its punching by a tool, in particular a press, provided with at least one movable punch.
  • the dies with which press tools are currently fitted have a single guide section.
  • the technique traditionally used to modify this guide section consists in using removable forks of different widths which are positioned on this matrix. These forks are positioned by means of grooves formed on two parallel faces of the matrix, their maintenance being ensured by pinching these two faces.
  • This method of fixing the forks has a first drawback relating to the difficulty of controlling the clamping forces.
  • this technique requires having several forks of different widths, adapted to the desired guide dimensions. To make a change of section, it is therefore necessary to carry out disassembly and reassembly operations of these forks. These different manipulations can be the source of errors in the choice of forks; moreover, these can be easily lost in a manufacturing workshop.
  • a final drawback of this technique resides in the fact that the abutment of the various profiles guided by the matrix is fixed whatever the guide dimension.
  • the present invention proposes to remedy the aforementioned drawbacks of the methods used to modify the guide dimension of a matrix.
  • the essential objective of the invention is to provide a matrix having at least two guide sections, to each of which is associated a specific stop, this matrix not requiring, in addition, the disassembly or assembly of any element when changing dimension.
  • Another object is to provide a die with an adjustable position stop for one of the guide sections.
  • Another objective is to provide a matrix with good resistance, allowing guide sections of small dimensions.
  • Another objective is to allow evacuation of the chips, whatever the orientation of the matrix.
  • the die will be described in its normal mounting position on a tool, the term “before” being used to define the side of the die where the profile is engaged.
  • the terms “height” and “width” correspond respectively to dimensions perpendicular and parallel to the direction of movement of the punches of the tool).
  • the invention relates to a matrix for guiding and positioning a profile, with a view to punching this profile by a tool, in particular a press, provided with at least one movable punch.
  • this matrix is characterized in that it comprises: a guide element of elongated shape, having a predetermined guide section, said guide element comprising engagement lights of the end of each punch, means for fixing the guide element to the tool, - A guide bracket carried by the guide element and having a guide section greater than the section of said guide element, said bracket comprising an end capable of acting as a stop for a profile engaged on the guide element and being adapted to slide longitudinally on said guide element between two positions: .
  • the guide element consists of a bar having a uniform guide section over the length which is released in the retracted position of the stirrup.
  • This matrix therefore presents two sections of guidance, the section change being simply obtained after sliding of the caliper between its advanced and retracted positions and requiring no disassembly.
  • the end of the stirrup acting as a stop for a section of lower section the guide length of the bar can be adjusted as desired in order to vary the position of the punching.
  • the guide element comprises: - a buidling bar composed of two longitudinal sections having a different guide section, a so-called front section, of determined guide section and a section, said rear, of intermediate guide section between the guide section of the front section and the section caliper guide, - A movable member articulated on the rear section so as to be able to be oriented in a closed position where it forms with the front section an assembly extending the rear section, or in an open position where it releases the front section so as to allow guidance of a profile by the latter.
  • each guide dimension corresponds to a specific stop, the stop of a section of large section guided on the stirrup being conventionally formed on the matrix support so as to give this stirrup a guide length greater than the guide lengths. other elements.
  • the guide length of each element is therefore proportional to the dimension of this element.
  • the guide length of the intermediate section element can be adjusted at will by locking the stirrup in an intermediate position between its advanced and retracted positions.
  • the movable member is articulated around an axis of rotation orthogonal to the longitudinal axis of the guide bar, the matrix comprising means for positioning said movable member adapted to block it in rotation, on the one hand in its closed position and, on the other hand, in an open position where it is oriented in a direction substantially orthogonal to the longitudinal axis of the guide bar.
  • the two sections of the guide bar, and the stirrup are preferably arranged so as to have faces, capable of serving as a support for the fabric for punching profiles, positioned in the same plane.
  • the fabric of the profile is therefore in contact with the matrix over its entire length, regardless of the guide section.
  • the engagement apertures of each punch are formed transversely in the front section of the guide bar so as to pass right through it.
  • the movable member is provided, facing these lights, with a recessed part opening out at its lower face.
  • the stirrup is, for its part, provided with a lower wing provided with a lumen arranged so as to be opposite the recessed part of the movable member in the advanced position of said stirrup.
  • the front section of the guide bar, the guide element constituted by the rear section of the guide bar and by the front section and movable member assembly, and the stirrup have a constant height determined as a function of the height of the cages of the profiles to be punched and a width equal, at least over a given length of these elements, to the width of said profile cages.
  • the invention relates to dies 1, 2 intended to be mounted, cantilevered, on a tool provided with a movement transformation system, as described in the patent application filed, in the name of the applicant, together with this application.
  • These dies are adapted to present either two or three sections allowing the guiding of profiles of different dimensions, the changes of sections being carried out without any disassembly of elements of these dies.
  • FIGS. 1 to 4 show two alternative embodiments concerning either a matrix 1 which can have two different guide sections (FIGS. 1 to 4), or a matrix 2 which can have three different guide sections (FIGS. 5 to 10).
  • the matrix shown in Figures 1 to 4 comprises a guide bar 3 of generally rectangular parallelepiped shape.
  • This bar 3 is provided transversely with two horizontal holes 4, 5 passing right through it, inside which the end of a punch engages.
  • one of these slots 4 has a circular section and allows the end of a cylindrical punch to be engaged.
  • the second light 5 has, for its part, an oblong shape combined with a shape punch.
  • this bar 3 on the tool is ensured by a yoke 6 provided with two horizontal branches extending relative to one of the lateral faces of this bar, at its rear end.
  • This yoke covers the matrix support, the guide element 3 being held in place by a fixing screw 7 housed in a transverse bore 8 formed in this bar and opening into the bottom of the yoke 6.
  • This guide bar 3 also has a fixed stop member 9, having a general T shape.
  • This member 9 is fixed on the lateral face of the bar 3, opposite to the yoke 6, so that the cross member 9a of the T is positioned vertically and oriented towards the front end of the bar. In this position, this stop member 9 constitutes a fixed stop for the end of a straight cut profile.
  • the abutment member 9 also has a recess 10 formed in its lateral face opposite to the guide bar 3 and opening into the bore 8 of this bar. With a diameter greater than the diameter of the bore 8, this recess makes it possible to house the head of the fixing screw 7.
  • this cross member 9a of this stop member being located substantially opposite the engagement lumen 5 of the form punch, this cross member 9a has a width less than the width of the upright of the stop member 9, so to preserve a chip evacuation space between this crosspiece and the side face opposite the guide bar 3.
  • This matrix also includes a guide stirrup 11 adapted to guide a profile having a cage with a height greater than the height of the profile cages guided by the guide bar 3.
  • This stirrup 11 has two branches 12, 13 of elongated shape and likewise width than the guide bar 3, these branches being arranged so as to cover over a determined length the upper and lower faces of this bar 3.
  • Each of these branches 12, 13 comprises, towards its rear end, a portion 14, 15 of greater width suitable for covering respectively the upper and lower faces of the guide bar 3 and of the stop member 9.
  • the two branches 12, 13 are connected laterally at their rear portions 14, 15, by means of a transverse wall 16 bearing against the external face of the stop member 9.
  • This transverse wall 16 is, moreover, provided with a longitudinal slot 17 inside which a screw 18 screwed longitudinally can be screwed into a threaded bore formed in the external face of the stop member 9.
  • the free end of this screw 18, projecting laterally relative to the transverse wall 16, is provided with a knurled nut 19 making it possible to press and maintain this transverse wall 16 against the external face of the stop member 9.
  • the stirrup can be moved relative to the guide bar 3 between two extreme positions: - an advanced position where the front end portions 14, 15 of the branches of this stirrup abuts against the cross member 9a of the stop member 9, and where the branches 12, 13 cover the upper and lower faces of the guide bar 3, - a retracted position where the front end of these branches 12, 13 is substantially aligned with the front face of the cross member 9a of the stop member 9.
  • this stirrup can be locked in translation in any intermediate position between its advanced and retracted positions.
  • the guide length of the guide bar 3 can therefore be adjusted in order to punch the profile at a predetermined distance from its end.
  • these dies being generally used for guiding profiles cut in miter, the abutment of the end of these profiles must have a front face inclined at 45 degrees relative to the longitudinal axis of these dies.
  • the front end of the branches 12, 13 is inclined so as to act as a stop at the end of miter cut sections guided by the guide bar 3.
  • the front faces 6a of the branches of the yoke 6 are inclined at 45 ° relative to the axis of the matrix 1. These faces 6a are thus adapted to serve as a fixed stop for the end of a profile cut in tab engaged on the caliper 11.
  • This fixed stop is, moreover, increased by means of a stud 20 projecting from the front face of the cross member 9a of the stop member 9.
  • This stud 20 has, in effect, an inclined front face s aligning in the same vertical plane as the faces 6a of the yoke 6.
  • the front face 16a of the transverse wall 16 is itself inclined at 45 ° relative to the axis of the matrix. In this way, this face 16a is always set back relative to the surface 6a-20 acting as a stop for a profile engaged on the stirrup 11.
  • the matrix 2 shown in Figures 5 to 10 has, in turn, three guide elements 21, 22, 23 of different dimensions (width and height), these elements 21, 22, 23 being arranged so as to allow, as before, a change of section without any disassembly of a member of the matrix.
  • This matrix 2 makes it possible to pierce the profiles, of two holes spaced horizontally by a predetermined center distance, depending on the center distance of the punches mounted on the tool. It should be noted that the punching is identical for the different sections of profiles engaged on this die 2.
  • This die 2 comprises a first guide element 21 adapted to be fixed on the die support of the tool. To this end, it is provided with a housing 24 arranged towards its rear end, and opening at one of its lateral faces. This housing 24 is adapted to accommodate a lateral edge of conjugate shape, of the matrix support. The actual fixing is ensured by means of fixing screws 25 housed in transverse bores opening respectively in the housing 24 and at the level of the opposite lateral face of the guide element 21.
  • This guide element 21 comprises, firstly, a guide bar 23, 28 composed of two longitudinal sections of different guide section: a front section 23 of determined guide section and a front section 23. These two sections are, in furthermore, arranged so that the longitudinal end 32a of the rear section 28 acts as a stop for a section cut in miter, engaged on the front section 23.
  • the front section 23 therefore allows the guiding of a spun pro with a cage of small dimensions, the punching fabric of which comes to bear against one of its lateral faces.
  • This section 23 is, moreover, provided transversely with two horizontal holes 29, 30, passing right through it, and allowing the engagement of the end of a punch. In this case, these slots 29, 30 have a circular section allowing the end of cylindrical punches to be engaged.
  • the guide element 21 also comprises a movable member 27 articulated on the rear section 28 so to be able to be oriented in two positions: a closed position where this member forms with the front section 23, an assembly extending the rear section 28 and having the same guide section as this rear section, - An open position where it is arranged at 90 degrees relative to the longitudinal axis of the guide bar so as to release the front section 23 and to allow the guiding of a profile by the latter.
  • the axis of rotation 31 of this movable member 27 is positioned at an extension 32 of the rear section 28, delimited by two transverse shoulders 33 formed at the upper and lower faces of this section 28.
  • the rear longidudinal end of this movable member has the shape of a yoke 34 inside which is housed the extension 32, the axis of rotation 31 connecting the wings of this yoke.
  • the shoulders 33 formed at the upper and lower faces of the rear section 28 have a height suitable for the guide element 21 to have a constant height over its entire guide length, length obtained in the closed position. of the movable member 27.
  • the axis of rotation 31 is not positioned at a weak resistance section, such as the embedding zone of the front section 23, but at the level of the extension 32 having sufficient dimensions to be only slightly weakened by the removal of material resulting from the presence of this axis.
  • the end of the extension 32 housed inside the yoke 34 of the movable member 27 also has a substantially rounded shape, against which the end of a positioning finger 35 integrated in a longitudinal housing 36 formed inside the movable member 27.
  • the end of this positioning finger 35 kept under pressure on the aforementioned end of the extension 32 by means of a spring 37, is housed , in each of the open and closed positions of the movable member 27, in a notch 38 ensuring perfect indexing in position of this movable member.
  • the movable member 27 has a lateral face having the shape of a yoke 39 of dimensions adapted to accommodate the front section 23, in the closed position of this movable member 27.
  • the front section 23 is provided, facing the bottom of the yoke 39, recesses such as 40 inside which open the engagement lights 29-30 of the punches.
  • the lower wing of the yoke 39 is provided with a cutout 41 ensuring the fall by gravity of the chips.
  • this face 42 of this movable member is provided inclined so as to define an angle of 45 degrees relative to the axis of the matrix.
  • this face 42 is always set back with respect to the stop of a profile engaged on the front section 23.
  • the movable member 27 has, towards its front end, a width, greater than its current width and combined with the predetermined dimensions of the cage of the profiles to be punched.
  • This increase in secti on is achieved by means of two wings 53 extending, over a given length of the movable member 27, the upper and lower faces of the latter.
  • This matrix finally comprises a guide stirrup 22, of greater cross section than the other two guide elements.
  • This bracket has the shape of a U whose wings 43, 44 are arranged parallel to the upper and lower faces of the guide bar and whose length is adapted to overlap this guide bar over a length substantially equivalent to the guide length of the latter.
  • the two wings 43, 44 of this stirrup 22 are connected by means of a side wall 45 coming to bear against the side face of the guide bar opposite the matrix support.
  • This side wall 45 is, moreover, provided with a longitudinal slot 46 inside which a screw 47 screwed longitudinally can be slid into a threaded bore formed in the side face of the guide bar.
  • the free end of this screw 47, projecting laterally with respect to the side wall 45, is provided with a knurled nut 48 making it possible to press and hold this wall 45 against the abovementioned lateral face of the guide bar.
  • this stirrup 22 can be moved longitudinally, relative to the guide element 21 between an advanced position where the wings 43, 44 are superimposed on the upper and lower faces of the guide bar, over a length determined from the front end of this bar and a retracted position where the guide bar is released over a length equivalent to its guide length. Furthermore, this stirrup 22 can be locked in any intermediate position between its advanced and retracted positions.
  • the lower wing 44 of the latter is provided with a slot 54 of oblong shape arranged so as to be opposite the cutout 41 of the movable member 27 in the advanced position of this stirrup.
  • the stirrup 22 is guided by means of a longitudinal rib 49 extending on a lateral face of the guide bar, opposite a longitudinal groove 50 of conjugate shape, formed in the lateral wall 45 of the stirrup.
  • a longitudinal rib 49 extending on a lateral face of the guide bar, opposite a longitudinal groove 50 of conjugate shape, formed in the lateral wall 45 of the stirrup.
  • a longitudinal groove 50 of conjugate shape formed in the lateral wall 45 of the stirrup.
  • in order to allow movement of the stirrup 22 to an advanced position where it covers the front end of the side wall 45 of this stirrup has two longitudinal grooves 51, inside which the wings 53 are housed defining the section of the guide element 21.
  • the front face of the wings 43, 44 of the stirrup is inclined by 45 degrees with respect to the axis of the matrix, so as to serve as a stop at the end of profiles cut in miter guided by the guide element 21.
  • the stop of a profile guided by the stirrup 22 is, in turn, co-located by a shoulder 52 formed on the matrix support.
  • This matrix 2 therefore has three guide sections to which correspond specific stop positions, the position of the stop of an intermediate section profile being additionally adjustable.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)
  • Presses And Accessory Devices Thereof (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)

Abstract

This die possesses in the first place a guiding bar (23, 28) composed of two longitudinal sections, a front section (23) of a specified guiding cross-section and a rear section (28) of a guiding cross-section greater than that of the front section. A moveable component (27) is articulated on the rear section (28) so as to be able to orient along a closed position where it forms, together with the front section (27), an assembly of the same cross-section as the rear section (28) and along an open position where it is clear of the front section (27). In addition, a yoke (22) of cross-section greater than that of the guiding bar (23, 28) is adapted in order to slide longitudinally over this bar between a forward position where it overlaps this bar over a specified length from the front end of the latter and a back position where it is clear of this bar over a specified guiding length. <IMAGE>

Description

L'invention concerne une matrice permettant le guidage et le positionnement d'un profilé en vue de son poinçonnage par un outil, notamment de presse, doté d'au moins un poinçon mobile.The invention relates to a matrix allowing the guiding and positioning of a profile for its punching by a tool, in particular a press, provided with at least one movable punch.

Les matrices dont sont dotés, actuellement, les outils de presse présentent une section de guidage unique. La technique traditionnellement employée pour modifier cette section de guidage consiste à utiliser des fourchettes amovibles de différentes largeurs venant se positionner sur cette matrice. Ces fourchettes sont positionnées au moyen de rainures ménagées sur deux faces parallèles de la matrice, leur maintien étant assuré par pincement de ces deux faces. Ce mode de fixation des fourchettes comporte un premier inconvénient relatif à la difficulté de maîtriser les forces de serrage. En outre, cette technique impose de posséder plusieurs fourchettes de largeurs différentes, adaptées aux dimensions de guidage désirées. Pour effectuer un changement de section, il est par conséquent nécessaire de procéder à des opérations de démontage et de remontage de ces fourchettes. Ces différentes manipulations peuvent être la source d'erreurs dans le choix des fourchettes ; de plus, ces dernières peuvent être facilement perdues dans un atelier de fabrication.The dies with which press tools are currently fitted have a single guide section. The technique traditionally used to modify this guide section consists in using removable forks of different widths which are positioned on this matrix. These forks are positioned by means of grooves formed on two parallel faces of the matrix, their maintenance being ensured by pinching these two faces. This method of fixing the forks has a first drawback relating to the difficulty of controlling the clamping forces. In addition, this technique requires having several forks of different widths, adapted to the desired guide dimensions. To make a change of section, it is therefore necessary to carry out disassembly and reassembly operations of these forks. These different manipulations can be the source of errors in the choice of forks; moreover, these can be easily lost in a manufacturing workshop.

Par ailleurs, lorsque les matrices travaillent en porte-à-faux, tel que par exemple sur des outils dotés d'un système de transformation de mouvement, celles-ci doivent présenter une résistance suffisante notamment lorsque la dimension de guidage est relativement faible.Furthermore, when the dies work in overhang, such as for example on tools provided with a movement transformation system, these must have sufficient strength, especially when the guide dimension is relatively small.

La technique précitée qui nécessite un enlèvement de matière sur la longueur des matrices ne peut donc satisfaire à une telle utilisation. Etant donné qu'à un même type de poinçonnage, il ne correspond généralement que trois sections de cages de profilés différentes, une solution pourrait consister à utiliser au moins deux postes de travail : un premier post doté d'une matrice adaptée pour présenter les deux dimensions de guidage les plus importantes et utilisant un système de fourchettes pour passer d'une section à l'autre, et un deuxième poste dotée d'une matrice présentant la dimension de guidage la plus faible. Toutefois, cette solution entraîne une multiplication des postes de travail. De plus, la place disponible pour les outils étant généralement limitée, cette technique n'est pas toujours applicable.The aforementioned technique which requires removal of material along the length of the dies cannot therefore satisfy such use. Given that for the same type of punching, there are generally only three sections of different profile cages, a solution could consist in using at least two workstations: a first post provided with a matrix adapted to present the two most important guide dimensions and using a fork system to pass from one section to another, and a second station provided with a matrix having the smallest guide dimension. However, this solution leads to a multiplication of workstations. In addition, the space available for tools is generally limited, this technique is not always applicable.

Un dernier inconvénient de cette technique réside dans le fait que la butée des différents profilés guidés par la matrice est fixe quelle que soit la dimension de guidage. Or, dans le domaine de la menuiserie aluminium notamment, il est fréquent d'avoir à pratiquer un même type de poinçonnage sur des profilés dont la section des cages est différente. Seule la position du poinçonnage par rapport à l'extrémité du profilé est modifiée. La présence d'une butée fixe oblige donc, dans ce cas, à prévoir une matrice pour chaque section de profilé, la longeur de guidage de cette matrice étant adaptée à la position de poinçonnage désirée. On conçoit qu'une telle solution, qui entraînerait un surcoût de production important, ne peut être retenue.A final drawback of this technique resides in the fact that the abutment of the various profiles guided by the matrix is fixed whatever the guide dimension. However, in the field of aluminum carpentry in particular, it is frequent to have to practice the same type of punching on profiles whose section of the cages is different. Only the position of the punch relative to the end of the profile is changed. The presence of a fixed stop therefore requires, in this case, to provide a die for each profile section, the guide length of this die being adapted to the desired punching position. It is understandable that such a solution, which would entail a significant additional cost of production, cannot be adopted.

La présente invention se propose de remédier aux inconvénients précités des procédés utilisés pour modifier la dimension de guidage d'une matrice. A cet effet, l'objectif essential de l'invention est de fournir une matrice présentant au moins deux sections de guidage, à chacune desquelles est associée une butée spécifique, cette matrice ne nécessitant, en outre, le démontage ou le montage d'aucun élément lors d'un changement de dimension.The present invention proposes to remedy the aforementioned drawbacks of the methods used to modify the guide dimension of a matrix. To this end, the essential objective of the invention is to provide a matrix having at least two guide sections, to each of which is associated a specific stop, this matrix not requiring, in addition, the disassembly or assembly of any element when changing dimension.

Un autre objectif est de fournir une matrice dotée d'une butée de position réglable pour une des sections de guidage.Another object is to provide a die with an adjustable position stop for one of the guide sections.

Un autre objectif est de fournir une matrice dotée d'une bonne résistance, autorisant des sections de guidage de faibles dim ensions.Another objective is to provide a matrix with good resistance, allowing guide sections of small dimensions.

Un autre objectif est de permettre une évacuation des copeaux, quelle que soit l'orientation de la matrice.Another objective is to allow evacuation of the chips, whatever the orientation of the matrix.

(Pour simplifier la description, la matrice sera décrite dans sa position normale de montage sur un outil, le terme "avant" étant utilisé pour définir le côté de la matrice où est engagé le profilé. En outre, les termes "hauteur" et "largeur" correspondent respectivement à des dimensions perpendiculaires et parallèles à la direction de déplacement des poinçons de l'outil).(To simplify the description, the die will be described in its normal mounting position on a tool, the term "before" being used to define the side of the die where the profile is engaged. In addition, the terms "height" and "width" correspond respectively to dimensions perpendicular and parallel to the direction of movement of the punches of the tool).

L'invention concerne une matrice pour le guidage et le positionnement d'un profilé, en vue du poinçonnage de ce profilé par un outil, notamment de presse, doté d'au moins un poinçon mobile. Selon cette invention, cette matrice se caractérise en ce qu'elle comprend :
- un élément de guidage de forme allongée, présentant une section de guidage prédéterminée, ledit élément de guidage comportant des lumières d'engagement de l'extrémité de chaque poinçon,
- des moyens de fixation de l'élément de guidage sur l'outil,
- un étrier de guidage porté par l'élément de guidage et présentant une section de guidage supérieure à la section dudit élément de guidage, ledit étrier comportant une extrémité apte à faire office de butée pour un profilé engagé sur l'élément de guidage et étant adapté pour coulisser longitudinalement sur ledit élément de guidage entre deux positions :
. une position avancée où l'étrier chevauche l'élément de guidage sur une longueur déterminée, à partir d'une extrémité longitudinale, dite extrémité avant, dudit élément de guidage,
. une position reculée où l'étrier dégage l'élément de guidage sur une longueur de guidage déterminée à partir de son extrémité avant,
- des moyens de blocage en translation de l'étrier aptes à permettre de bloquer ledit étrier dans une des positions avancée ou reculée précitées, ou dans une position intermédiaire.The invention relates to a matrix for guiding and positioning a profile, with a view to punching this profile by a tool, in particular a press, provided with at least one movable punch. According to this invention, this matrix is characterized in that it comprises:
a guide element of elongated shape, having a predetermined guide section, said guide element comprising engagement lights of the end of each punch,
means for fixing the guide element to the tool,
- A guide bracket carried by the guide element and having a guide section greater than the section of said guide element, said bracket comprising an end capable of acting as a stop for a profile engaged on the guide element and being adapted to slide longitudinally on said guide element between two positions:
. an advanced position where the stirrup straddles the guide element over a determined length, from a longitudinal end, called the front end, of said guide element,
. a retracted position where the stirrup releases the guide element over a guide length determined from its front end,
- Locking means in translation of the stirrup adapted to allow blocking said stirrup in one of the aforementioned advanced or retracted positions, or in an intermediate position.

Selon un premier mode de réalisation préférentiel, l'élément de guidage est constitué d'une barre présentant une section de guidage uniforme sur la longueur qui se trouve dégagée dans la position reculée de l'étrier.According to a first preferred embodiment, the guide element consists of a bar having a uniform guide section over the length which is released in the retracted position of the stirrup.

Cette matrice présente donc deux sections de guidage, le changement de section étant simplement obtenu après coulissement de l'étrier entre ses positions avancée et reculée et ne nécessitant aucun démontage. En outre, l'extrémité de l'étrier faisant office de butée pour un profilé de section inférieure, la longueur de guidage de la barre peut être réglée à volonté afin de faire varier la position du poinçonnage.This matrix therefore presents two sections of guidance, the section change being simply obtained after sliding of the caliper between its advanced and retracted positions and requiring no disassembly. In addition, the end of the stirrup acting as a stop for a section of lower section, the guide length of the bar can be adjusted as desired in order to vary the position of the punching.

Selon un deuxième mode de réalisation préférentiel, l'élément de guidage comprend :
- une barre de buidage composée de deux tronçons longitudinaux présentant une section de guidage différente, un tronçon dit avant, de section de guidage déterminée et un tronçon, dit arrière, de section de guidage intermédiaire entre la section de guidage du tronçon avant et la section de guidage de l'étrier,
- un organe mobile articulé sur le tronçon arrière de façon à pouvoir être orienté selon une position fermée où il forme avec le tronçon avant un ensemble prolongeant le tronçon arrière, ou selon une position ouverte où il dégage le tronçon avant de façon à permettre le guidage d'un profilé par ce dernier.According to a second preferred embodiment, the guide element comprises:
- a buidling bar composed of two longitudinal sections having a different guide section, a so-called front section, of determined guide section and a section, said rear, of intermediate guide section between the guide section of the front section and the section caliper guide,
- A movable member articulated on the rear section so as to be able to be oriented in a closed position where it forms with the front section an assembly extending the rear section, or in an open position where it releases the front section so as to allow guidance of a profile by the latter.

Cette matrice possède donc trois sections de guidage différentes, les changements de sections ne nécessitant aucun démontage d'élément. En outre, le tronçon arrière présente avantageusement une extrémité longitudinale faisant office de butée pour un profilé de petite section engagé sur le tronçon avant. Ainsi, à chaque dimension de guidage correspond une butée spécifique, la butée d'un profilé de grande section guidé sur l'étrier étant classiquement ménagée sur le support de matrice de façon à conférer à cet étrier une longueur de guidage supérieure aux longueurs de guidage des autres éléments. La longueur de guidage de chaque élément est donc proportionnelle à la dimension de cet élément.This matrix therefore has three different guide sections, the section changes not requiring any element disassembly. In addition, the rear section advantageously has a longitudinal end acting as a stop for a section of small section engaged on the front section. Thus, each guide dimension corresponds to a specific stop, the stop of a section of large section guided on the stirrup being conventionally formed on the matrix support so as to give this stirrup a guide length greater than the guide lengths. other elements. The guide length of each element is therefore proportional to the dimension of this element.

De plus, la longueur de guidage de l'élément de section intermédiaire peut être réglée à volonté en bloquant l'étrier dans une position intermédiaire entre ses positions avancée et reculée.In addition, the guide length of the intermediate section element can be adjusted at will by locking the stirrup in an intermediate position between its advanced and retracted positions.

Selon une autre caractéristique de l'invention, l'organe mobile est articulé autour d'un axe de rotation orthogonal par rapport à l'axe longitudinal de la barre de guidage, la matrice comprenant des moyens de positionnement dudit organe mobile adaptés pour le bloquer en rotation, d'une part dans sa position fermée et, d'autre part, dans une position ouverte où il est orienté selon une direction sensiblement orthogonale par rapport à l'axe longitudinal de la barre de guidage.According to another characteristic of the invention, the movable member is articulated around an axis of rotation orthogonal to the longitudinal axis of the guide bar, the matrix comprising means for positioning said movable member adapted to block it in rotation, on the one hand in its closed position and, on the other hand, in an open position where it is oriented in a direction substantially orthogonal to the longitudinal axis of the guide bar.

Par ailleurs, les deux tronçons de la barre de guidage, et l'étrier sont préférentiellement agencés de façon à présenter des faces, aptes à servir d'appui à la toile à poinçonner des profilés, positionnées dans un même plan. La toile du profilé se trouve donc en contact avec la matrice sur toute sa longueur et ce quelle que soit la section de guidage.Furthermore, the two sections of the guide bar, and the stirrup are preferably arranged so as to have faces, capable of serving as a support for the fabric for punching profiles, positioned in the same plane. The fabric of the profile is therefore in contact with the matrix over its entire length, regardless of the guide section.

Selon une autre caractéristique de l'invention, les lumières d'engagement de chaque poinçon sont ménagées transversalement dans le tronçon avant de la barre de guidage de façon à traverser ce dernier de part en part. D'autre part, l'organe mobile est doté, en regard de ces lumières, d'une partie évidée débouchant au niveau de sa face inférieure. L'étrier est, quant à lui, doté d'une aile inférieure pourvue d'une lumière ménagée de façon à se trouver en regard de la partie évidée de l'organe mobile dans la position avancée dudit étrier. Ainsi, quelle que soit la section de guidage sélectionnée, les copeaux sont automatiquement évacués et ce, pour toute orientation de la matrice.According to another characteristic of the invention, the engagement apertures of each punch are formed transversely in the front section of the guide bar so as to pass right through it. On the other hand, the movable member is provided, facing these lights, with a recessed part opening out at its lower face. The stirrup is, for its part, provided with a lower wing provided with a lumen arranged so as to be opposite the recessed part of the movable member in the advanced position of said stirrup. Thus, whatever the guide section selected, the chips are automatically evacuated for any orientation of the matrix.

Selon une autre caractéristique de l'invention, le tronçon avant de la barre de guidage, l'élément de guidage constitué par le tronçon arrière de la barre de guidage et par l'ensemble tronçon avant et organe mobile, et l'étrier présentent une hauteur constante déterminée en fonction de la hauteur des cages des profilés à poinçonner et une largeur égale, au moins sur une longueur donnée de ces éléments, à la largeur desdites cages de profilés.According to another characteristic of the invention, the front section of the guide bar, the guide element constituted by the rear section of the guide bar and by the front section and movable member assembly, and the stirrup have a constant height determined as a function of the height of the cages of the profiles to be punched and a width equal, at least over a given length of these elements, to the width of said profile cages.

D'autres caractéristiques et avantages de l'invention se dégageront de la description détaillée qui suit et de l'examen des dessins annexés qui en présentent deux modes de réalisation préférentiels. Sur ces dessins qui font partie intégrante de la présente description :

  • - la figure 1 est une vue en perspective d'un premier mode de réalisation correspondant à une matrice présentant deux sections de guidage, cette matrice étant représentée dans la position où elle permet le guidage d'un profilé doté d'une cage de grande section,
  • - la figure 2 en est une vue en perspective dans la position où cette matrice permet le guidage d'un profilé doté d'une cage de petite section,
  • - la figure 3 en est une coupe transversale par un plan vertical B.B.,
  • - la figure 4 en est une coupe transversale par un plan vertical A.A.,
  • - la figure 5 est une vue en perspective d'un deuxième mode de réalisation, correspondant à une matrice présentant trois sections de guidage, cette matrice étant représentée dans la position où elle permet le guidage d'un profilé doté d'une cage de grande section,
  • - la figure 6 en est une vue en perspective, dans une position où cette matrice permet le guidage d'un profilé doté d'une cage de section intermédiaire,
  • - la figure 7 en est une vue en perspective, dans une position où cette matrice permet le guidage d'un profilé doté d'une cage de petite section,
  • - la figure 8 en est une coupe longitudinale par un plan horizontal C.C,
  • - la figure 9 en est une coupe transversale par un plan vertical D.D, dans la position où cette matrice permet le guidage d'un profilé doté d'une cage de grande section,
  • - la figure 10 en est une coupe transversale par un plan vertical E.E, dans l a position où cette matrice permet le guidage d'un profilé doté d'une cage de petite section.
Other characteristics and advantages of the invention will emerge from the detailed description which follows and examining the accompanying drawings which show two preferred embodiments. On these drawings which form an integral part of this description:
  • - Figure 1 is a perspective view of a first embodiment corresponding to a matrix having two guide sections, this matrix being shown in the position where it allows the guiding of a profile having a cage of large section ,
  • FIG. 2 is a perspective view thereof in the position where this matrix allows the guiding of a profile provided with a cage of small section,
  • FIG. 3 is a cross section thereof through a vertical plane BB,
  • FIG. 4 is a cross section thereof through a vertical plane AA,
  • - Figure 5 is a perspective view of a second embodiment, corresponding to a matrix having three guide sections, this matrix being shown in the position where it allows the guiding of a profile with a large cage section,
  • FIG. 6 is a perspective view thereof, in a position where this matrix allows the guiding of a profile provided with a cage of intermediate section,
  • FIG. 7 is a perspective view thereof, in a position where this matrix allows the guiding of a profile provided with a cage of small section,
  • FIG. 8 is a longitudinal section thereof through a horizontal plane CC,
  • FIG. 9 is a cross section thereof through a vertical plane DD, in the position where this matrix allows the guiding of a profile provided with a cage of large section,
  • - Figure 10 is a cross section through a vertical plane EE, in the position where this matrix allows the guiding of a profile with a cage of small section.

L'invention concerne des matrices 1, 2 destinées à être montées, en porte à faux, sur un outil doté d'un système de transformation de mouvement, tel que décrit dans la demande de brevet déposée, au nom du demandeur, conjointement à la présente demande. Ces matrices sont adaptées pour présenter soit deux, soit trois sections permettant le guidage de profilés de dimensions différentes, les changements de sections étant effectués sans aucun démontage d'éléments de ces matrices.The invention relates to dies 1, 2 intended to be mounted, cantilevered, on a tool provided with a movement transformation system, as described in the patent application filed, in the name of the applicant, together with this application. These dies are adapted to present either two or three sections allowing the guiding of profiles of different dimensions, the changes of sections being carried out without any disassembly of elements of these dies.

Les dessins annexés représentent deux variantes de réalisation concernant, soit une matrice 1 pouvant présenter deux sections de guidage différentes (figures 1 à 4), soit une matrice 2 pouvant présenter trois sections de guidage différentes (figures 5 à 10).The accompanying drawings show two alternative embodiments concerning either a matrix 1 which can have two different guide sections (FIGS. 1 to 4), or a matrix 2 which can have three different guide sections (FIGS. 5 to 10).

La matrice représentée aux figures 1 à 4 comprend une barre de guidage 3 de forme générale parallélépipédique rectangle. Cette barre 3 est doté transversalement de deux lumières 4, 5 horizontales la traversant de part en part, à l'intérieur desquelles s'engage l'extrémité d'un poinçon. En l'occurrence, une de ces lumières 4 présente une section circulaire et permet d'engager l'extrémité d'un poinçon cylindrique. La deuxième lumière 5 présente, quant à elle, une forme oblongue conjuguée d'un poinçon de forme.The matrix shown in Figures 1 to 4 comprises a guide bar 3 of generally rectangular parallelepiped shape. This bar 3 is provided transversely with two horizontal holes 4, 5 passing right through it, inside which the end of a punch engages. In this case, one of these slots 4 has a circular section and allows the end of a cylindrical punch to be engaged. The second light 5 has, for its part, an oblong shape combined with a shape punch.

La fixation de cette barre 3 sur l'outil est assurée par une chape 6 dotée de deux branches horizontales s'étendant par rapport à une des faces latérales de cette barre, au niveau de son extrémité arrière. Cette chape vient coiffer le support de matrice, le maintien de l'élément de guidage 3 étant assuré par une vis de fixation 7 logée dans un alésage 8 transversal ménagé dans cette barre et débouchant dans le fonds de la chape 6.The fixing of this bar 3 on the tool is ensured by a yoke 6 provided with two horizontal branches extending relative to one of the lateral faces of this bar, at its rear end. This yoke covers the matrix support, the guide element 3 being held in place by a fixing screw 7 housed in a transverse bore 8 formed in this bar and opening into the bottom of the yoke 6.

Cette barre de guidage 3 possède en outre un organe de butée fixe 9, présentant une forme générale en T. Cet organe 9 est fixé sur la face latérale de la barre 3, opposée à la chape 6, de façon que la traverse 9a du T soit positionnée verticalement et orientée vers l'extrémité avant de la barre. Dans cette position, cet organe de butée 9 constitue une butée fixe pour l'extrémité d'un profilé coupé droit.This guide bar 3 also has a fixed stop member 9, having a general T shape. This member 9 is fixed on the lateral face of the bar 3, opposite to the yoke 6, so that the cross member 9a of the T is positioned vertically and oriented towards the front end of the bar. In this position, this stop member 9 constitutes a fixed stop for the end of a straight cut profile.

L'organe de butée 9 présente, en outre, un enfoncement 10, ménagé dans sa face latérale opposée à la barre de guidage 3 et débouchant dans l'alésage 8 de cette barre. De diamètre supérieur au diamètre de l'alésage 8, cet enfoncement permet de loger la tête de la vis de fixation 7.The abutment member 9 also has a recess 10 formed in its lateral face opposite to the guide bar 3 and opening into the bore 8 of this bar. With a diameter greater than the diameter of the bore 8, this recess makes it possible to house the head of the fixing screw 7.

Par ailleurs, la traverse 9a de cet organe de butée se trouvant sensiblement en regard de la lumière d'engagement 5 du poinçon de forme, cette traverse 9a présente une largeur inférieure à la largeur du montant de l'organe de butée 9, de façon à préserver un espace d'évacuation des copeaux entre cette traverse et la face latérale en regard de la barre de guidage 3.Furthermore, the cross member 9a of this stop member being located substantially opposite the engagement lumen 5 of the form punch, this cross member 9a has a width less than the width of the upright of the stop member 9, so to preserve a chip evacuation space between this crosspiece and the side face opposite the guide bar 3.

Cette matrice comprend également un étrier de guidage 11 adapté pour guider un profilé présentant une cage de hauteur supérieure à la hauteur des cages de profilés guidés par la barre de guidage 3. Cet étrier 11 comporte deux branches 12, 13 de forme allongée et de même largeur que la barre de guidage 3, ces branches étant agencées de façon à coiffer sur une longueur déterminée les faces supérieure et inférieure de cette barre 3.This matrix also includes a guide stirrup 11 adapted to guide a profile having a cage with a height greater than the height of the profile cages guided by the guide bar 3. This stirrup 11 has two branches 12, 13 of elongated shape and likewise width than the guide bar 3, these branches being arranged so as to cover over a determined length the upper and lower faces of this bar 3.

Chacune de ces branches 12, 13 comporte, vers son extrémité arrière, une portion 14, 15 de largeur supérieure adaptée pour recouvrir respectivement les faces supérieure et inférieure de la barre de guidage 3 et de l'organe de butée 9.Each of these branches 12, 13 comprises, towards its rear end, a portion 14, 15 of greater width suitable for covering respectively the upper and lower faces of the guide bar 3 and of the stop member 9.

Les deux branches 12, 13 sont reliées latéralement au niveau de leurs portions arrières 14, 15, au moyen d'une paroi transversale 16 prenant appui contre la face externe de l'organe de butée 9. Cette paroi transversale 16 est, en outre, dotée d'une lumière longitudinale 17 à l'intérieur de laquelle peut coulisser longitudinalement une vis 18 vissée dans un alésage taraudé ménagé dans la face externe de l'organ e de butée 9. L'extrémité libre de cette vis 18, en saillie latéralement par rapport à la paroi transversale 16, est dotée d'un écrou moleté 19 permettant de mettre en appui et maintenir cette paroi transversale 16 contre la face externe de l'organe de butée 9.The two branches 12, 13 are connected laterally at their rear portions 14, 15, by means of a transverse wall 16 bearing against the external face of the stop member 9. This transverse wall 16 is, moreover, provided with a longitudinal slot 17 inside which a screw 18 screwed longitudinally can be screwed into a threaded bore formed in the external face of the stop member 9. The free end of this screw 18, projecting laterally relative to the transverse wall 16, is provided with a knurled nut 19 making it possible to press and maintain this transverse wall 16 against the external face of the stop member 9.

Ainsi, l'étrier peut être déplacé relativement à la barre de guidage 3 entre deux positions extrêmes :
- une position avancée où l'extrémité avant des portions 14, 15 des branches de cet étrier vient en butée contre la traverse 9a de l'organe de butée 9, et où les branches 12, 13 recouvrent les faces supérieure et inférieure de la barre de guidage 3,
- une position reculée où l'extrémité avant de ces branches 12, 13 se trouve sensiblement alignée avec la face avant de la traverse 9a de l'organe de butée 9.Thus, the stirrup can be moved relative to the guide bar 3 between two extreme positions:
- an advanced position where the front end portions 14, 15 of the branches of this stirrup abuts against the cross member 9a of the stop member 9, and where the branches 12, 13 cover the upper and lower faces of the guide bar 3,
- a retracted position where the front end of these branches 12, 13 is substantially aligned with the front face of the cross member 9a of the stop member 9.

Par ailleurs, cet étrier peut être bloqué en translation dans toute position intermédiaire entre ses positions avancée et reculée. La longueur de guidage de la barre de guidage 3 peut donc être réglée en vue de poinçonner le profilé à une distance prédéterminée de son extrémité.Furthermore, this stirrup can be locked in translation in any intermediate position between its advanced and retracted positions. The guide length of the guide bar 3 can therefore be adjusted in order to punch the profile at a predetermined distance from its end.

De plus, ces matrices étant généralement utilisées pour le guidage de profilés coupés en onglet, la butée de l'extrémité de ces profilés doit présenter une face avant inclinée à 45 degrés par rapport à l'axe longitudinal de ces matrices.In addition, these dies being generally used for guiding profiles cut in miter, the abutment of the end of these profiles must have a front face inclined at 45 degrees relative to the longitudinal axis of these dies.

Par conséquent, l'extrémité avant des branches 12, 13 est inclinée de façon à servir de butée à l'extrémité de profilés coupés en onglet guidés par la barre de guidage 3.Consequently, the front end of the branches 12, 13 is inclined so as to act as a stop at the end of miter cut sections guided by the guide bar 3.

De même, les faces avant 6a des branches de la chape 6 sont inclinées à 45° par rapport à l'axe de la matrice 1. Ces faces 6a sont ainsi adaptées pour servir de butée fixe pour l'extrémité d'un profilé coupé en onglet engagé sur l'étrier 11.Similarly, the front faces 6a of the branches of the yoke 6 are inclined at 45 ° relative to the axis of the matrix 1. These faces 6a are thus adapted to serve as a fixed stop for the end of a profile cut in tab engaged on the caliper 11.

La surface de cette butée fixe est, par ailleurs, augmentée au moyen d'un tenon 20 en saillie sur la face avant de la traverse 9a de l'organe de butée 9. Ce tenon 20 présente, en effet, une face avant inclinée s'alignant dans un même plan vertical que les faces 6a de la chape 6.The surface of this fixed stop is, moreover, increased by means of a stud 20 projecting from the front face of the cross member 9a of the stop member 9. This stud 20 has, in effect, an inclined front face s aligning in the same vertical plane as the faces 6a of the yoke 6.

En outre, la face avant 16a de la paroi transversale 16 est, elle-même, inclinée à 45° par rapport à l'axe de la matrice. De cette façon, cette face 16a se trouve toujours en retrait par rapport à la surface 6a-20 faisant office de butée pour un profilé engagé sur l'étrier 11.In addition, the front face 16a of the transverse wall 16 is itself inclined at 45 ° relative to the axis of the matrix. In this way, this face 16a is always set back relative to the surface 6a-20 acting as a stop for a profile engaged on the stirrup 11.

La matrice 2 représentée aux figures 5 à 10 présente, quant à elle, trois éléments de guidage 21, 22, 23 de dimensions (largeur et hauteur) différentes, ces éléments 21, 22, 23 étant agencés de façon à permettre, comme précédemment, un changement de section sans aucun démontage d'un organe de la matrice. Cette matrice 2 permet de percer les profilés, de deux trous espacés horizontalement d'un entr'axe prédéterminé, fonction de l'entr'axe des poinçons montés sur l'outil. Il est à noter que le poinçonnage est identique pour les différentes sections de profilés engagés sur cette matrice 2.The matrix 2 shown in Figures 5 to 10 has, in turn, three guide elements 21, 22, 23 of different dimensions (width and height), these elements 21, 22, 23 being arranged so as to allow, as before, a change of section without any disassembly of a member of the matrix. This matrix 2 makes it possible to pierce the profiles, of two holes spaced horizontally by a predetermined center distance, depending on the center distance of the punches mounted on the tool. It should be noted that the punching is identical for the different sections of profiles engaged on this die 2.

Cette matrice 2 comporte un premier élément de guidage 21 adapté pour être fixé sur le support de matrice de l'outil. A cet effet, il est doté d'un logement 24 ménagé vers son extrémité arrière, et s'ouvrant au niveau d'une de ses faces latérales. Ce logement 24 est adapté pour loger un bord latéral de forme conjuguée, du support de matrice. La fixation proprement dite est assurée au moyen de vis de fixation 25 logées dans des alésages transversaux débouchant respectivement dans le logement 24 et au niveau de la face latérale opposée de l'élément de guidage 21.This die 2 comprises a first guide element 21 adapted to be fixed on the die support of the tool. To this end, it is provided with a housing 24 arranged towards its rear end, and opening at one of its lateral faces. This housing 24 is adapted to accommodate a lateral edge of conjugate shape, of the matrix support. The actual fixing is ensured by means of fixing screws 25 housed in transverse bores opening respectively in the housing 24 and at the level of the opposite lateral face of the guide element 21.

Cet élément de guidage 21 comprend, en premier lieu, une barre de guidage 23, 28 composée de deux tronçons longitudinaux de section de guidage différente : un tronçon avant 23 de section de guidage déterminée et un tronçon avant 23. Ces deux tronçons sont, en outre, agencés de façon que l'extrémité longitudinale 32a du tronçon arrière 28 fasse office de butée pour un profilé coupé en onglet, engagé sur le tronçon avant 23.This guide element 21 comprises, firstly, a guide bar 23, 28 composed of two longitudinal sections of different guide section: a front section 23 of determined guide section and a front section 23. These two sections are, in furthermore, arranged so that the longitudinal end 32a of the rear section 28 acts as a stop for a section cut in miter, engaged on the front section 23.

Le tronçon avant 23 permet donc le guidage d'un pro filé doté d'une cage de faibles dimensions dont la toile à poinçonner vient en appui contre une de ses faces latérales. Ce tronçon 23 est, en outre, doté transversalement de deux lumières 29, 30 horizontales, le traversant de part en part, et permettant l'engagement de l'extrémité d'un poinçon. En l'occurrence ces lumières 29, 30 présentent une section circulaire permettant d'engager l'extrémité de poinçons cylindriques.The front section 23 therefore allows the guiding of a spun pro with a cage of small dimensions, the punching fabric of which comes to bear against one of its lateral faces. This section 23 is, moreover, provided transversely with two horizontal holes 29, 30, passing right through it, and allowing the engagement of the end of a punch. In this case, these slots 29, 30 have a circular section allowing the end of cylindrical punches to be engaged.

L'élément de guidage 21 comprend également un organe 27, mobile, articulé sur le tronçon arrière 28 de façon à pouvoir être orienté selon deux positions :
- une position fermée où cet organe forme avec le tronçon avant 23, un ensemble prolongeant le tronçon arrière 28 et présentant la même section de guidage que ce tronçon arrière,
- une position ouverte où il est disposé à 90 degrés par rapport à l'axe longitudinal de la barre de guidage de façon à dégager le tronçon avant 23 et à permettre le guidage d'un profilé par ce dernier.The guide element 21 also comprises a movable member 27 articulated on the rear section 28 so to be able to be oriented in two positions:
a closed position where this member forms with the front section 23, an assembly extending the rear section 28 and having the same guide section as this rear section,
- An open position where it is arranged at 90 degrees relative to the longitudinal axis of the guide bar so as to release the front section 23 and to allow the guiding of a profile by the latter.

Par ailleurs, l'axe de rotation 31 de cet organe mobile 27 se trouve positionné au niveau d'une extension 32 du tronçon arrière 28, délimitée par deux épaulements 33 transversaux ménagés au niveau des faces supérieure et inférieure de ce tronçon 28. Afin de réaliser la liaison entre l'organe mobile 27 et cette extension 32, l'extrémité longidudinale arrière de cet organe mobile présente la forme d'une chape 34 à l'intérieur de laquelle vient se loger l'extension 32, l'axe de rotation 31 reliant les ailes de cette chape.Furthermore, the axis of rotation 31 of this movable member 27 is positioned at an extension 32 of the rear section 28, delimited by two transverse shoulders 33 formed at the upper and lower faces of this section 28. In order to making the connection between the movable member 27 and this extension 32, the rear longidudinal end of this movable member has the shape of a yoke 34 inside which is housed the extension 32, the axis of rotation 31 connecting the wings of this yoke.

Il est à noter que les épaulements 33 ménagées au niveau des faces supérieure et inférieure du tronçon arrière 28, présentent une hauteur adaptée pour que l'élément de guidage 21 présente une hauteur constante sur toute sa longueur de guidage, longueur obtenue dans la position fermée de l'organe mobile 27. Par ailleurs, l'axe de rotation 31 n'est pas positionné au niveau d'une section de faible résistance, telle que la zone d'encastrement du tronçon avant 23, mais au niveau de l'extension 32 présentant des dimensions suffisantes pour n'être que peu affaiblie par l'enlèvement de matière résultant de la présence de cet axe.It should be noted that the shoulders 33 formed at the upper and lower faces of the rear section 28 have a height suitable for the guide element 21 to have a constant height over its entire guide length, length obtained in the closed position. of the movable member 27. Furthermore, the axis of rotation 31 is not positioned at a weak resistance section, such as the embedding zone of the front section 23, but at the level of the extension 32 having sufficient dimensions to be only slightly weakened by the removal of material resulting from the presence of this axis.

L'extrémité de l'extension 32 logée à l'intérieur de la chape 34 de l'organe mobile 27 présente, en outre, un forme sensiblement arrondie, contre laquelle vient prendre appui l'extrémité d'un doigt de positionnement 35 intégré dans un logement longitudinal 36 ménagé à l'intérieur de l'organe mobile 27. L'extrémité de ce doigt de positionnement 35, maintenue en pression sur l'extrémité précitée de l'extension 32 au moyen d'un ressort 37, vient se loger, dans chacune des positions ouverte et fermée de l'organe mobile 27, dans une encoche 38 assurant un parfait indexage en position de cet organe mobile.The end of the extension 32 housed inside the yoke 34 of the movable member 27 also has a substantially rounded shape, against which the end of a positioning finger 35 integrated in a longitudinal housing 36 formed inside the movable member 27. The end of this positioning finger 35, kept under pressure on the aforementioned end of the extension 32 by means of a spring 37, is housed , in each of the open and closed positions of the movable member 27, in a notch 38 ensuring perfect indexing in position of this movable member.

Par ailleurs, l'organe mobile 27 comporte une face latérale présentant la forme d'une chape 39 de dimensions adaptées pour loger le tronçon avant 23, dans la position fermée de cet organe mobile 27. Afin de permettre l'évacuation des copeaux dans cette position fermée de l'organe mobile 27, le tronçon avant 23 est doté, en regard du fond de la chape 39, d'enfoncements tels que 40 à l'intérieur desquels débouchent les lumières d'engagement 29-30 des poinçons. De son côté, l'aile inférieure de la chape 39 est dotée d'une découpe 41 assurant la chute par gravité des copeaux.Furthermore, the movable member 27 has a lateral face having the shape of a yoke 39 of dimensions adapted to accommodate the front section 23, in the closed position of this movable member 27. In order to allow the evacuation of the chips in this closed position of the movable member 27, the front section 23 is provided, facing the bottom of the yoke 39, recesses such as 40 inside which open the engagement lights 29-30 of the punches. For its part, the lower wing of the yoke 39 is provided with a cutout 41 ensuring the fall by gravity of the chips.

En outre, la face arrière 42 de cet organe mobile est prévue inclinée de façon à définir un angle de 45 degrés par rapport à l'axe de la matrice. Ainsi, cette face 42 se trouve toujours en retrait par rapport à la butée d'un profilé engagé sur le tronçon avant 23.In addition, the rear face 42 of this movable member is provided inclined so as to define an angle of 45 degrees relative to the axis of the matrix. Thus, this face 42 is always set back with respect to the stop of a profile engaged on the front section 23.

En dernier lieu, un des buts visés étant de permettre de guider les profilés entre des faces supérieure et inférieure s'étendant selon toute la largeur de la cage de ces profilés, l'organe mobile 27 présente, vers son extrémité avant, un largeur, supérieure à sa largeur courante et conjuguée des dimensions prédéterminées de la cage des profilés à poinçonner. Cette augmentation de secti on est réalisée au moyen de deux ailes 53 prolongeant, sur une longueur donnée de l'organe mobile 27, les faces supérieure et inférieure de ce dernier. Ce choix permet en effet d'atteindre le but visé tout en utilisant un élément de guidage 21 de faible encombrement, sa section courante étant inférieure à la section des cages des profilés.Finally, one of the aims being to guide the profiles between upper and lower faces extending over the entire width of the cage of these profiles, the movable member 27 has, towards its front end, a width, greater than its current width and combined with the predetermined dimensions of the cage of the profiles to be punched. This increase in secti on is achieved by means of two wings 53 extending, over a given length of the movable member 27, the upper and lower faces of the latter. This choice in fact makes it possible to achieve the intended goal while using a guide element 21 of small bulk, its current section being smaller than the section of the cages of the profiles.

Cette matrice comprend enfin un étrier de guidage 22, de section supérieure aux deux autres éléments de guidage. Cet étrier présente la forme d'un U dont les ailes 43, 44 sont disposées parallèlement aux faces supérieure et inférieure de la barre de guidage et dont la longueur est adaptée pour chevaucher cette barre de guidage sur une longueur équivalant sensiblement à la longueur de guidage de cette dernière.This matrix finally comprises a guide stirrup 22, of greater cross section than the other two guide elements. This bracket has the shape of a U whose wings 43, 44 are arranged parallel to the upper and lower faces of the guide bar and whose length is adapted to overlap this guide bar over a length substantially equivalent to the guide length of the latter.

Les deux ailes 43, 44 de cet étrier 22 sont reliées au moyen d'une paroi latérale 45 venant prendre appui contre la face latérale de la barre de guidage opposée au support de matrice. Cette paroi latérale 45 est, en outre, dotée d'une lumière longitudinale 46 à l'intérieur de laquelle peut coulisser longitudinalement une vis 47 vissée dans un alésage taraudé ménagé dans la face latérale de la barre de guidage. L'extrémité libre de cette vis 47, en saillie latéralement par rapport à la paroi latérale 45, est dotée d'un écrou moleté 48 permettant de mettre en appui et maintenir cette paroi 45 contre la face latérale précitée de la barre de guidage.The two wings 43, 44 of this stirrup 22 are connected by means of a side wall 45 coming to bear against the side face of the guide bar opposite the matrix support. This side wall 45 is, moreover, provided with a longitudinal slot 46 inside which a screw 47 screwed longitudinally can be slid into a threaded bore formed in the side face of the guide bar. The free end of this screw 47, projecting laterally with respect to the side wall 45, is provided with a knurled nut 48 making it possible to press and hold this wall 45 against the abovementioned lateral face of the guide bar.

Ainsi, cet étrier 22 peut être déplacé longitudinalement, relativement à l'élément de guidage 21 entre une position avancée où les ailes 43, 44 sont superposées aux faces supérieure et inférieure de la barre de guidage, sur une longueur déterminée à partir de l'extrémité avant de cette barre et une position reculée où la barre de guidage est dégagée sur une longueur équivalant à sa longueur de guidage. Par ailleurs, cet étrier 22 peut être bloqué dans toute position intermédiaire entre ses positions avancée et reculée.Thus, this stirrup 22 can be moved longitudinally, relative to the guide element 21 between an advanced position where the wings 43, 44 are superimposed on the upper and lower faces of the guide bar, over a length determined from the front end of this bar and a retracted position where the guide bar is released over a length equivalent to its guide length. Furthermore, this stirrup 22 can be locked in any intermediate position between its advanced and retracted positions.

En outre, afin de permettre l'évacuation des copeaux lors du poinçonnage d'un profilé guidé par l'étrier 22, l'aile inférieure 44 de celui-ci est dotée d'une lumière 54 de forme oblongue ménagée de façon à se trouver en regard de la découpe 41 de l'organe mobile 27 dans la position avancée de cet étrier.In addition, in order to allow chip evacuation during the punching of a profile guided by the stirrup 22, the lower wing 44 of the latter is provided with a slot 54 of oblong shape arranged so as to be opposite the cutout 41 of the movable member 27 in the advanced position of this stirrup.

Lors de ses déplacements, l'étrier 22 est guidé au moyen d'une nervure longitudinale 49 s'étendant sur une face latérale de la barre de guidage, en regard d'une rainure longitudinale 50 de forme conjuguée, ménagée dans la paroi latérale 45 de l'étrier. En outre, afin de permettre un déplacement de l'étrier 22 jusqu'à une position avancée où il recouvre l'extrémité avant de la paroi latérale 45 de cet étrier comporte deux gorges 51 longitudinales, à l'intérieur desquelles se logent les ailes 53 définissant la section de l'élément de guidage 21.During its movements, the stirrup 22 is guided by means of a longitudinal rib 49 extending on a lateral face of the guide bar, opposite a longitudinal groove 50 of conjugate shape, formed in the lateral wall 45 of the stirrup. In addition, in order to allow movement of the stirrup 22 to an advanced position where it covers the front end of the side wall 45 of this stirrup has two longitudinal grooves 51, inside which the wings 53 are housed defining the section of the guide element 21.

En dernier lieu, la face avant des ailes 43, 44 de l'étrier est inclinée de 45 degrés par rapport à l'axe de la matrice, de façon à servir de butée à l'extrémité de profilés coupés en onglet guidés par l'élément de guidage 21. La butée d'un profilé guidé par l'étrier 22 est, quant à elle, cosntituée par un épaulement 52 ménagé sur le support de matrice.Finally, the front face of the wings 43, 44 of the stirrup is inclined by 45 degrees with respect to the axis of the matrix, so as to serve as a stop at the end of profiles cut in miter guided by the guide element 21. The stop of a profile guided by the stirrup 22 is, in turn, co-located by a shoulder 52 formed on the matrix support.

Cette matrice 2 possède donc trois sections de guidage auxquelles correspondent des positions de butée spécifiques, la position de la butée d'un profilé de section intermédiaire étant en outre réglable. This matrix 2 therefore has three guide sections to which correspond specific stop positions, the position of the stop of an intermediate section profile being additionally adjustable.

Claims (11)

1/ - Matrice pour le guidage et le positionnement d'un profilé, en vue du poinçonnage dudit profilé par un outil, notamment de presse, doté d'un poinçon mobile, ladite matrice étant caractérisée en ce qu'elle comprend :
- un élément de guidage (3 ; 21) de forme allongée, présentant une section de guidage prédéterminée, ledit élément de guidage comportant des lumières (4, 5 ; 29, 30) d'engagement de l'extrémité de chaque poinçon,
- des moyens de fixation (7, 8, 10 ; 25, 26) de l'élément de guidage (3 ; 21) sur l'outil,
- un étri er de guidage (11 ; 22) porté par l'élément de guidage (3 ; 32) et présentant une section de guidage supérieure à la section dudit élément de guidage, ledit étrier comportant une extrémité apte à faire office de butée pour un profilé engagé sur l'élément de guidage (3 ; 21), et étant adapté pour coulisser longitudinalement sur ledit élément de guidage entre deux positions :
. une position avancée où l'étrier (11 ; 22) chevauche l'élément de guidage (3 ; 21) sur une longueur déterminée, à partir d'une extrémité longitudinale, dite extrémité avant, dudit élément de guidage,
. une position reculée où l'étrier (11 ; 22) dégage l'élément de guidage (3 ; 21) sur une longueur de guidage déterminée à partir de son extrémité avant,
- des moyens de blocage (18, 19 ; 47, 48) en translation de l'étrier (11 ; 22) aptes à permettre de bloquer ledit étrier dans une des positions avancée ou reculée précitées, ou dans une position intermédiaire.1 / - Matrix for guiding and positioning a profile, with a view to punching said profile by a tool, in particular a press, provided with a movable punch, said matrix being characterized in that it comprises:
a guide element (3; 21) of elongated shape, having a predetermined guide section, said guide element comprising slots (4, 5; 29, 30) for engaging the end of each punch,
- means for fixing (7, 8, 10; 25, 26) of the guide element (3; 21) on the tool,
- A guide bracket (11; 22) carried by the guide element (3; 32) and having a guide section greater than the section of said guide element, said bracket having an end adapted to act as a stop for a profile engaged on the guide element (3; 21), and being adapted to slide longitudinally on said guide element between two positions:
. an advanced position where the stirrup (11; 22) overlaps the guide element (3; 21) over a determined length, from a longitudinal end, called the front end, of said guide element,
. a retracted position where the stirrup (11; 22) releases the guide element (3; 21) over a guide length determined from its front end,
- Locking means (18, 19; 47, 48) in translation of the stirrup (11; 22) capable of making it possible to block said stirrup in one of the above-mentioned forward or backward positions, or in an intermediate position. 2/ - Matrice selon la revendication 1, caractérisée en ce que l'élément de guidage (3) est constitué d'une barre présentant une section de guidage uniforme sur la longueur qui se trouve dégagée dans la position reculée de l'étrier (11).2 / - Matrix according to claim 1, characterized in that the guide element (3) consists of a bar having a uniform guide section over the length which is released in the retracted position of the stirrup (11 ). 3/ - Matrice selon la revendication 1, caractérisée en ce que l'élément de guidage (21) comprend :
- une barre (23, 28) composée de deux tronçons longitudinaux présentant une section de guidage différente, un tronçon (23), dit avant, de section de guidage déterminée et un tronçon (28), dit arrière, de section de guidage intermédiaire entre la section de guidage du tronçon avant (23) et la section de guidage de l'étrier (22),
- une organe mobile (27) articulé sur le tronçon arrière (28) de façon à pouvoir être orienté selon une position fermée où il forme, avec le tronçon avant (23), un ensemble prolongeant le tronçon arrière (28) et présentant la même section de guidage que ce tronçon arrière (28), ou selon une position ouverte où il dégage le tronçon avant (23) de façon à permettre le guidage d'un profilé par ce dernier.3 / - Matrix according to claim 1, characterized in that the guide element (21) comprises:
- a bar (23, 28) composed of two longitudinal sections having a guide section different, a section (23), said front, of determined guide section and a section (28), said rear, of intermediate guide section between the guide section of the front section (23) and the guide section of the stirrup (22),
- A movable member (27) articulated on the rear section (28) so as to be able to be oriented in a closed position where it forms, with the front section (23), an assembly extending the rear section (28) and having the same guide section as this rear section (28), or in an open position where it releases the front section (23) so as to allow the guiding of a profile by the latter. 4/ - Matrice selon la revendication 3, caractérisée en ce que le tronçon arrière (28) présente une extrémité longitudinale (42), dite avant, apte à faire office de butée, pour un profilé guidé par le tronçon avant (23) de la barre de guidage.4 / - Matrix according to claim 3, characterized in that the rear section (28) has a longitudinal end (42), called the front, capable of acting as a stop, for a profile guided by the front section (23) of the guide bar. 5/ - Matrice selon l'une des revendications 3 ou 4, caractérisée en ce que l'organe mobile (27) est articulé autour d'un axe de rotation (31) orthogonal par rapport à l'axe longitudinal de la barre de guidage (23, 28), ladite matrice comprenant des moyens de positionnement (35-38) dudit organe mobile, adaptés pour le bloquer en rotation, d'une part, dans sa position fermée et, d'autre part, dans une position ouverte où il est orienté selon une direction sensiblement orthogonale par rapport à l'axe longitudinal de ladite barre.5 / - Matrix according to one of claims 3 or 4, characterized in that the movable member (27) is articulated around an axis of rotation (31) orthogonal to the longitudinal axis of the guide bar (23, 28), said matrix comprising positioning means (35-38) of said movable member, adapted to block it in rotation, on the one hand, in its closed position and, on the other hand, in an open position where it is oriented in a direction substantially orthogonal to the longitudinal axis of said bar. 6/ - Matrice selon la revendication 5, caractérisée en ce que les moyens de positionnement (35-38) de l'organe mobile (27) comprennent :
- un doigt de positionnement (35) intégré dans un logement (36) dudit organe mobile et possédant une extrémité longitudinale maintenue en pression contre l'axe de rotation (31),
- deux encoches (38) ménagées sur l'axe de rotation (31), de façon à loger l'extrémité précitée du doigt de positionnement dans chacune des positions ouverte et fermée de l'organe mobile (27).6 / - Matrix according to claim 5, characterized in that the positioning means (35-38) of the movable member (27) comprise:
a positioning finger (35) integrated in a housing (36) of said movable member and having a longitudinal end maintained under pressure against the axis of rotation (31),
- Two notches (38) formed on the axis of rotation (31), so as to accommodate the aforementioned end of the positioning finger in each of the open and closed positions of the movable member (27). 7/ - Matrice selon l'une des revendications 3 à 6, caractérisée en ce que :
- l'étrier (22) est doté d'une face latérale (45) dotée d'une lumière (46) longitudinale, ladite face étant agencée de façon à prendre appui contre une face latérale du tronçon arrière (28) de la barre de guidage opposée aux poinçons,
- les moyens de blocage en translation de l'étrier (22) comprennent une vis de fixation (47) logée dans la lumière longitudinale (46) précitée et vissée dans la face en regard du tronçon arrière (28), ladite vis étant dotée au niveau de son extrémité libre d'un écrou (48) apte à mettre en appui et maintenir la face laté rale (45) de l'étrier contre la face en regard dudit tronçon arrière.7 / - Matrix according to one of claims 3 to 6, characterized in that:
- The stirrup (22) is provided with a lateral face (45) provided with a longitudinal light (46), said face being arranged so as to bear against a lateral face of the rear section (28) of the bar guidance opposite to the punches,
- The locking means in translation of the stirrup (22) comprise a fixing screw (47) housed in the aforementioned longitudinal slot (46) and screwed into the opposite face of the rear section (28), said screw being provided at level of its free end of a nut (48) capable of pressing and maintaining the lateral face (45) of the stirrup against the opposite face of said rear section. 8/ - Matrice selon la revendication 7, caractérisée en ce que les lumières d'engagement (29, 30) de chaque poinçon sont ménagées transversalement dans le tronçon avant (23) de la barre de guidage (23, 28) de façon à traverser ce dernier de part en part, l'organe mobile (27) étant doté en regard desdites lumières d'une partie évidée (41) débouchant au niveau de sa face inférieure et l'étrier (22) étant doté d'une aile inférieure (44) pourvue d'une lumière (54) ménagée de façon à se trouver en regard de la partie évidée (41) de l'organe mobile (27), dans la position avancée dudit étrier.8 / - Matrix according to claim 7, characterized in that the engagement slots (29, 30) of each punch are formed transversely in the front section (23) of the guide bar (23, 28) so as to pass through the latter right through, the movable member (27) being provided opposite said lights with a recessed part (41) opening at its lower face and the stirrup (22) being provided with a lower wing ( 44) provided with a light (54) arranged so as to be opposite the hollowed-out part (41) of the movable member (27), in the advanced position of said stirrup. 9/ - Matrice selon l'une des revendications 7 ou 8, caractérisée en ce que les deux tronçons (23, 28) de la barre de guidage et l'étrier (22) sont agencés de façon à présenter des faces, aptes à servir d'appui à la toile à poinçonner des profilés, alignées dans un même plan.9 / - Matrix according to one of claims 7 or 8, characterized in that the two sections (23, 28) of the guide bar and the stirrup (22) are arranged so as to have faces, suitable for use supporting the punching canvas of the profiles, aligned in the same plane. 10/ - Matrice selon l'une des revendications 2 à 9, caractérisée en ce que le tronçon avant (23) de la barre de guidage, l'élément de guidage (21) constitué par le tronçon arrière (28) de la barre de guidage et par l'ensemble tronçon avant (23) - organe mobile (27), et l'étrier (22) présentent une hauteur constante déterminée en fonction de la hauteur des cages des profilés à poinçonner et une largeur égale, au moins sur une longueur donnée de ces éléments, à la largeur desdites cages de profilés.10 / - Matrix according to one of claims 2 to 9, characterized in that the front section (23) of the guide bar, the guide element (21) constituted by the rear section (28) of the bar guide and by the entire front section (23) - movable member (27), and the stirrup (22) have a constant height determined as a function of the height of the cages of the profiles to be punched and an equal width, at least on one given length of these elements, to the width of said profile cages. 11/ - Matrice selon l'une des revendications précédentes, destinée à être montée en porte-à-faux sur un outil de presse doté d'un système de transformation de mouvement adapté pour entrainer un déplacement de chaque poinçon selon une direction déterminée, différente de la direction de travail de la presse.11 / - Matrix according to one of the preceding claims, intended to be mounted in cantilever on a press tool with a movement transformation system adapted to cause a displacement of each punch in a determined direction, different from the working direction of the press.
EP19870402603 1986-11-19 1987-11-18 Die for a press tool for guiding and positioning a profile in order to punch it Expired - Lifetime EP0268534B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8616427 1986-11-19
FR8616427A FR2606685B1 (en) 1986-11-19 1986-11-19 PRESS TOOL MATRIX FOR GUIDANCE AND POSITIONING OF A PROFILE FOR PUNCHING

Publications (2)

Publication Number Publication Date
EP0268534A1 true EP0268534A1 (en) 1988-05-25
EP0268534B1 EP0268534B1 (en) 1991-10-16

Family

ID=9341200

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19870402603 Expired - Lifetime EP0268534B1 (en) 1986-11-19 1987-11-18 Die for a press tool for guiding and positioning a profile in order to punch it

Country Status (6)

Country Link
EP (1) EP0268534B1 (en)
DE (1) DE3773846D1 (en)
ES (1) ES2025684T3 (en)
FR (1) FR2606685B1 (en)
GR (1) GR3002907T3 (en)
PT (1) PT86159B (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2252881A1 (en) * 1973-11-29 1975-06-27 Whitney Italia Clamping arrgmt. for elongated workpieces - uses hydraulic cylinder for clamping through angled plunger during hole boring
DE2455122A1 (en) * 1974-11-21 1976-08-12 Loth Hermann Window frame notching die - has lever cam to close adjustable size jaw faces onto window members
FR2310868A1 (en) * 1975-05-12 1976-12-10 Yoshida Kogyo Kk PORTABLE PRESS

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2252881A1 (en) * 1973-11-29 1975-06-27 Whitney Italia Clamping arrgmt. for elongated workpieces - uses hydraulic cylinder for clamping through angled plunger during hole boring
DE2455122A1 (en) * 1974-11-21 1976-08-12 Loth Hermann Window frame notching die - has lever cam to close adjustable size jaw faces onto window members
FR2310868A1 (en) * 1975-05-12 1976-12-10 Yoshida Kogyo Kk PORTABLE PRESS

Also Published As

Publication number Publication date
PT86159B (en) 1993-08-31
DE3773846D1 (en) 1991-11-21
FR2606685B1 (en) 1989-02-17
PT86159A (en) 1988-12-15
EP0268534B1 (en) 1991-10-16
FR2606685A1 (en) 1988-05-20
GR3002907T3 (en) 1993-01-25
ES2025684T3 (en) 1992-04-01

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