EP0272175B1 - Press tool for displacing the punches in a direction which differs from the working direction of the press - Google Patents

Press tool for displacing the punches in a direction which differs from the working direction of the press Download PDF

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Publication number
EP0272175B1
EP0272175B1 EP19870402602 EP87402602A EP0272175B1 EP 0272175 B1 EP0272175 B1 EP 0272175B1 EP 19870402602 EP19870402602 EP 19870402602 EP 87402602 A EP87402602 A EP 87402602A EP 0272175 B1 EP0272175 B1 EP 0272175B1
Authority
EP
European Patent Office
Prior art keywords
punch
tool
slider
punch holder
die
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
EP19870402602
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German (de)
French (fr)
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EP0272175A1 (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
Original Assignee
Technal SA
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Filing date
Publication date
Application filed by Technal SA filed Critical Technal SA
Publication of EP0272175A1 publication Critical patent/EP0272175A1/en
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Publication of EP0272175B1 publication Critical patent/EP0272175B1/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
    • 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
    • B21D28/32—Perforating, i.e. punching holes in other articles of special shape

Definitions

  • the invention relates to a tool provided with at least one die and at least one punch, intended to be mounted on a machine, such as a press comprising an assembly table and a slide movable relative to this assembly table. , this tool making it possible to move each punch in a determined working direction, different from the working direction of the slide.
  • a tool according to the first part of claim 1 is known from US-A-2,421,864.
  • the traditional tools currently used on presses are designed to obtain a displacement of the punches in a single direction, identical to that of the slide.
  • This type of tool has many drawbacks, in particular when they are used for punching profiles in the field of aluminum carpentry.
  • the distance between the base of the slide and the mounting table limits the size of the profiles that can be punched.
  • the solution consisting in carrying out the punching in overhang, with respect to the assembly table is also unsatisfactory because of the forces to which the tool is subjected, which are hardly compatible with the very high precision required.
  • this type of tool does not allow punching of profiles of complex configuration endowed with cavities of difficult access.
  • due to the configuration of the profile it is sometimes impossible to evacuate the chips along a vertical axis. During the production of several punchings along the same profile, these chips therefore accumulate and can cause a deterioration of this profile and the blocking of the tool. To avoid this accumulation, it is then necessary to remove the profile to evacuate the chip, after each punching operation.
  • the present invention proposes to provide a press tool making it possible to move the punches in a direction different from the working direction of this press, this tool overcoming the drawbacks of the aforementioned prior art.
  • the essential objective of the invention is to provide a tool, in one piece, capable of being mounted on a conventional press, and having a movement transformation system making it possible to work in any direction relative to to the working direction of the press, without causing power losses during the transmission of the initial force of this press.
  • Another objective is to provide a tool provided with several work stations each carrying one or more punches whose directions of movement are independent with respect to each other.
  • Another objective is to provide a tool of reduced dimensions integrating a movement transformation system of small bulk.
  • Another objective is to provide a tool provided with a centralized selection device for the various punches.
  • Another objective is to provide a tool fitted with a punch attachment system allowing assembly and disassembly of these punches from the matrix side face of the punch holders, and having no raised portion relative to the base of these punch holders.
  • Another objective is to provide a tool provided with punch holders of small section and authorizing a floating mounting of one or more punches, the system for attaching these punches further authorizing a rigorous orientation of the punches.
  • the tool will be described in its normal mounting position on a press, the terms “upper”, “lower”, “front”, “lateral”, being used to define the faces of this tool seen by a person in front of this press.
  • the term “punch” is used in its broad sense, and designates a tool capable of carrying out stamping, cutting, stamping, stamping operations, etc.).
  • the tool targeted by the invention, is of the type comprising at least one die and one punch, and is intended to be mounted on a machine, such as in particular a press, provided with an assembly table and a slide movable relative to said mounting table; this tool, adapted to allow each punch to be moved in a determined direction, different from the direction of movement of the slider, comprising a pusher assembly adapted to be fixed on the slider, a body provided with means for guiding the pusher assembly and adapted to be fixed on the assembly table, at least one work station carried by the body and comprising a die, at least one punch holder movable relative to said matrix and means for guiding each punch holder oriented according to a determined direction, different from the direction of movement of the pusher assembly, and, associated with each punch holder, a deflection device connecting said punch holder to the pusher assembly and adapted to generate a displacement in the two direction of said punch holder along its guide means when the slide is actuated, and is characterized in that each return device comprises an articulated rocker
  • This tool in one piece, therefore, is both the push-button assembly intended to transmit the force of the slide, the workstation or workstations, and the movement transformation device.
  • the guide means of each punch holder are independent of each other and the movement of these punch holders is generated by deflection devices, themselves independent of each other. It is therefore easily understood that each punch holder, and in particular the punch holders of the same work station, can be moved in determined directions, different from one punch holder to another.
  • the determination of the angle of inclination between the direction of movement of the slide of the machine and the longitudinal axis of the guide housings of these punch holders will be determined according to the size of the profiles and will be adapted to allow the '' cutter evacuation after punching.
  • This possibility of adapting the working angle of the punches as a function of the shape of the profiles therefore makes it possible to solve the problems mentioned above, by means of a compact tool able to be mounted on a conventional press equipped with 'a slide movable in a direction orthogonal to the assembly table.
  • the inclination of the work stations can be adapted to the required working conditions, the pusher assembly is also preferably fixed on the slider so as to be driven in a direction parallel to the direction of movement of this slider.
  • each return device comprises an articulated rocker about an axis of rotation carried by the body, said rocker being connected respectively to the pusher assembly and to a punch holder, so as to be driven in rotation during movement of said pusher assembly and to generate a displacement of the corresponding punch holder along its guide means.
  • each rocker comprises two openings respectively arranged opposite the pusher assembly and a punch holder.
  • the push-button assembly and each punch holder are, for their part, provided with guide pins housed in the aforementioned slots, said guide pins being of shapes suitable for being guided along a rectilinear trajectory inside said slots, during a rotation of the rocker.
  • the initial force of the slide is transferred entirely to the punch holder, without loss of power, by the effect of a simple rotation of the rocker.
  • the rocker of small dimensions, can be housed in a reduced location and does not cause the tool to be oversized. This latter consideration makes it preferable to choose a rocker in relation, in particular, to a deflection device using a pinion system. Indeed, due to the reduced size, the teeth of these pinions would be too small and would have too low a resistance.
  • the pusher assembly consists of an attachment member able to be fixed to the slide, and under which extend a plurality of pistons, each connected to a punch holder by means the corresponding return device.
  • This attachment member is also preferably made up of two parts, lower and upper, which can be dismantled, adapted to keep pinched, in their assembled position, the upper end of the pistons provided, for this purpose, with a section head. greater than the body of these pistons.
  • the tool comprises at least two work stations each provided with at least two punch holders
  • the latter is advantageously provided with a selection member centralized allowing to choose the punch or punches of each workstation activated during a displacement of the slide.
  • the upper part of the attachment member comprises, opposite at least two piston heads each connected to a punch holder of a different work station, a transverse groove of conjugate shape of said piston heads.
  • the selection member is, for its part, provided with registers of shapes adapted to be housed in each aforementioned groove, said member being movable between an active position where each register is housed in a groove and a passive position where each register is removed. said grooves.
  • This centralized selection member therefore makes it possible to eliminate any source of errors, in the selection of the punches used, in particular during the manufacture of a series of frames, requiring the same type of brackets for the assembly of profiles, cut in tab. This centralized selection is also necessary during straight section assemblies, depending on the configuration of the profiles.
  • the work stations are also provided with removable dies mounted on a die support.
  • the means for guiding the punch holders are, for their part, preferably made up of housings of conjugate shape of these punch holders, and opening out in line with a lateral face of the die support, facing said die.
  • the punches mounted on the end of these punch holders are therefore accessible, on the die side, after disassembly of the latter and therefore do not require, when they are changed, disassembly of the mechanism.
  • each punch holder preferably has the shape of at least one yoke, each of these yokes having two opposite transverse grooves, each formed in a wing of said yoke, at a distance from the end said wings.
  • Each punch is in turn provided with a shaped collar adapted to be housed in a removable manner in the grooves of an aforementioned yoke.
  • This punch attachment system therefore makes it possible to assemble them on small punch holders. section, therefore of reduced bulk; it also allows the use of punches, the section of which can be identical to the section of these punch holders.
  • the punch holders are not provided with any fixing member projecting from their external wall, and can therefore slide freely inside their guide housings.
  • this mode of attachment of the punches allows the attachment of one or more punches on the same punch holder.
  • each punch is provided with a centering tail of shape adapted to be housed in a blind hole opening into the bottom of the yoke of each punch holder.
  • the collar of each punch has an elongated asymmetrical shape, adapted to allow its rotation between a working position where the collar is engaged in the grooves of the yoke, and a disassembled position where said collar is oriented so that it can slide. between the wings of said yoke; the tool further comprises a locking member capable of holding said flange in its working position.
  • the blind hole in the bottom of the clevis of the punch holder ensures centering of the punch, the release of the latter being allowed by the asymmetrical shape of the collar.
  • the punch can be advantageously mounted floating, on the one hand by providing a centering tail of section slightly smaller than that of the blind hole and, on the other hand by providing a small clearance between the member. lock and collar. The self-centering of the punch relative to the die is thus improved.
  • FIGS. 1 and 2 to 7 respectively are intended to be mounted on a press.
  • This press comprises an assembly table 1 and a slide 2 movable, in an orthogonal direction, relative to this table (these two elements are shown diagrammatically in broken lines in FIGS. 1 and 2).
  • the mounting table 1 has a groove 3 with a rectified side face, and clamping fingers 4 ensuring the locking of the tool on this table.
  • the slider 2 has, meanwhile, facing the mounting table, a groove 5 and tightening tie rods 6 ensuring the maintenance of the tool on this slide.
  • Each tool consists of three essential parts: a body 7 adapted to be fixed on the assembly table, a pusher assembly 8, 9, 10 adapted to be fixed on the slide, and movable relative to the body 7, in a direction orthogonal to the assembly table 1, and two work stations 11, 12 carried by the body 7, on either side of the pusher assembly 8, 9, 10, each of the work stations comprising two punch holders .
  • the body 7 is provided with a stud 13 projecting from its underside.
  • This tenon 13, of conjugate shape of the groove 3 of the table 1 has a rectified lateral face intended to come into abutment against the rectified face of this groove 3.
  • the opposite lateral face of the tenon 13 is provided with a groove 14 in shape of half dovetail, conjugate with the end of the clamping fingers 4.
  • the pusher assembly has a fastening member 8, 9 on the slide 2, provided with a lug 15 of shape conjugate of the groove 5 of this slide.
  • the upper face of this tenon 15 further comprises two tapped bores 16 with a conjugate diameter of the threaded end of the tightening rods 6 of the slide 2.
  • attachment member 8, 9 consists of two lower parts 9 and upper 8, removable, secured by means of fixing screws 17. Under this attachment member extend four pistons 10, of general shapes cylindrical, aligned in the longitudinal plane of symmetry of the tool.
  • pistons 10 are provided with a head 18, of diameter greater than the piston body, kept pinched between the lower 9 and upper 8 parts of the attachment member.
  • These housings 19 also open out at the level from the underside of the body 7, via a section 20 of section lower than the current section of these dwellings.
  • the pusher assembly is furthermore provided with a centralized selection member making it possible to select the number of pistons 10 actuated during the movement of the slide 2. In this case, this selection makes it possible to actuate each time the slide 2, either two or four pistons.
  • the upper part 8 is provided, opposite the lower part 9, with two transverse grooves 21, separated by a rib 24 of a height suitable for profiling with the lower face of this upper part 8.
  • These two grooves 21 are arranged so as to allow, each, a vertical movement of a head 18 of piston 10, relative to the attachment member.
  • the rib 24 comes, as for it, to pinch the head 18 of the piston 10 positioned between the two aforementioned pistons.
  • the front face 25 of the selection member and the opposite face of the heads 18 of the pistons 10 have a bevelled shape intended to facilitate the sliding of this member 22.
  • a spring plunger 26 keeps the selection member 22 in each of its positions.
  • the second member of the tool consists of two work stations 11, 12 fixed to the body 7 on either side of the pusher assembly 8, 9, 10, so as to allow, in particular, the guidance of the 'fastening member 8, 9.
  • Each of these work stations comprises a matrix support 27 on which is fixed, in a removable manner, a matrix represented diagrammatically at 28.
  • Each work station 11, 12 also comprises two punch holders 29, of generally cylindrical shapes, moving in guide housings 30 of conjugate shapes, opening on the one hand at a lateral face of a matrix support 27 and, on the other hand, substantially opposite a piston 10.
  • the guide housings 30 can thus be oriented so as to determine any angle with the direction press work.
  • Each of the rockers 31 has a V shape and is articulated around an axis of rotation 35, carried by the body 7 of the tool.
  • the angle determined by the branches 36, 37 of these rockers depends on the direction of movement of the punch holders 29.
  • these rockers have an L shape.
  • each of the branches 36, 37 of these rockers 31 have the shape of a yoke inside which is housed, either the end of a punch holder 29, or a section of the body of a piston 10.
  • the ends of the punch holders 29 have two flats.
  • the peripheral wall of the piston bodies 10 has two shoulders defining a section having two flats.
  • each punch holder 29 and the corresponding piston 10 being arranged to slide one against the other during the actuation of the slider 2, one of the aforementioned respective flats of these punch and piston holders is extended by so as to determine a plane contact surface between these two elements.
  • rockers 31 and punch holder 29 or piston 10 The actual connection between rockers 31 and punch holder 29 or piston 10 is produced by means of guide pins 38, 39 passing through these punch holders and pistons and being housed in grooves 40, 41 formed at the level of the longitudinal end of each of the branches 36, 37 of the rocker 31.
  • the respective shapes of these guide pins 38, 39 and of these grooves 40, 41 are determined so that, during a rotation of the rocker 31 around its axis of rotation 35, each guide pin 38, 39 is guided rectilinearly in a groove 40, 41, causing the movement of the punch holder 29 along its guide means 30.
  • This movement transformation system of small size, therefore allows to make small tools.
  • the punch holder 29-rocker 31-piston 10 assemblies being independent of each other, it is easily possible to orient each guide housing 30 in a determined direction independent of the orientation of the neighboring guide housings.
  • the punches 42 carried by the punch holders 29 must be accessible on the die side 28, in order to allow their assembly or disassembly.
  • each guide housing 30 has an open face opening at the upper face of a die support 27.
  • the corresponding end of the punch holders 29 is, for its part, of a flat 43 so as to be flush with this upper face of the matrix support 27.
  • This end of the punch holders 29 has, moreover, the form of a yoke 44 each of the wings of which has, internally, a transverse groove 45, formed at a distance from the end of this yoke.
  • a blind hole 46 is formed in the bottom of this yoke 44.
  • Each punch 42 has, for its part, a centering tail 47 of a shape adapted to be housed in the abovementioned blind hole 46.
  • the locking in translation of these punches 42 is ensured by means of a flange 48 of a shape suitable for being received in the grooves 45 of the yoke 44 of the punch holders 29.
  • This flange 48 has, in addition, two flats, allowing its sliding between the wings of the yoke 44.
  • the punch 42 can either slide inside the yoke 44 during assembly or disassembly operations, or be blocked in translation after rotation of this quarter collar.
  • a sealing plate 49 is fixed on the upper face of the die support 27 so as to bear on the respective flats 43 of the punch holder and of the flange 42.
  • a floating mounting is also ensured by providing a slight clearance on the one hand between the centering tail 47 and the blind hole 46 and, on the other hand, between the closure plate 49 and the flange 42.
  • the tool is provided with a front die assembly 50-front punch 51 intended to cut, according to a determined cutting mode, the end of a profile.
  • This assembly is intended, in particular, to make a cut in a fabric of this profile, in order to allow the passage of the linkage of a window frame.
  • the front punch 51 fixed to the lower part 9 of the attachment member by means of a fixing screw 52, has a rectangular parallelepiped shape.
  • the lower end 53 of this front punch 51 has a width less than the width of the running part, and is guided in a guide housing 54 arranged, facing the body 7 of the tool, in the front die 50 fixed to this body 7 by means of a fixing screw 55.
  • this housing 54 has an inclined bottom 54a, opening at the bottom at an opening in one of the side faces of the front die 50. This latter arrangement makes it possible to evacuate, by gravity, the chips coming from the cutting.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Punching Or Piercing (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)
  • Automatic Assembly (AREA)

Description

L'invention concerne un outil doté d'au moins une matrice et d'au moins un poinçon, destiné à être monté sur une machine, telle qu'une presse comportant une table de montage et un coulisseau mobile par rapport à cette table de montage, cet outil permettant de déplacer chaque poinçon suivant une direction de travail déterminée, différente de la direction de travail du coulisseau. Un outil conforme à la première partie de la revendication 1 est connu du US-A- 2 421 864.The invention relates to a tool provided with at least one die and at least one punch, intended to be mounted on a machine, such as a press comprising an assembly table and a slide movable relative to this assembly table. , this tool making it possible to move each punch in a determined working direction, different from the working direction of the slide. A tool according to the first part of claim 1 is known from US-A-2,421,864.

Les outils traditionnels utilisés actuellement sur des presses sont conçus pour obtenir un déplacement des poinçons suivant une direction unique, identique à celle du coulisseau. Ce type d'outils présente de nombreux inconvénients, notamment, lors de leur utilisation pour le poinçonnage de profilés dans le domaine de la menuiserie aluminium. En premier lieu, la distance séparant la base du coulisseau de la table de montage, limite la taille des profilés pouvant être poinçonnés. La solution consistant à réaliser le poinçonnage en porte-à-faux, par rapport à la table de montage est également peu satisfaisante en raison des efforts auxquels est soumis l'outil, peu compatibles avec la très grande précision exigée. Par ailleurs, ce type d'outils ne permet pas de poinçonner des profilés de configuration complexe dotés montamment de cavités d'accès difficile. En dernier lieu, en raison de la configuration du profilé, il est parfois impossible d'évacuer les copeaux suivant un axe vertical. Lors de la réalisation de plusieurs poinçonnages le long d'un même profilé, ces copeaux s'accumulent donc et peuvent entraîner une détérioration de ce profilé et le blocage de l'outil. Afin d'éviter cette accumulation, il est alors nécessaire de retirer le profilé pour évacuer le copeau, après chaque opération de poinçonnage.The traditional tools currently used on presses are designed to obtain a displacement of the punches in a single direction, identical to that of the slide. This type of tool has many drawbacks, in particular when they are used for punching profiles in the field of aluminum carpentry. First, the distance between the base of the slide and the mounting table limits the size of the profiles that can be punched. The solution consisting in carrying out the punching in overhang, with respect to the assembly table is also unsatisfactory because of the forces to which the tool is subjected, which are hardly compatible with the very high precision required. In addition, this type of tool does not allow punching of profiles of complex configuration endowed with cavities of difficult access. Finally, due to the configuration of the profile, it is sometimes impossible to evacuate the chips along a vertical axis. During the production of several punchings along the same profile, these chips therefore accumulate and can cause a deterioration of this profile and the blocking of the tool. To avoid this accumulation, it is then necessary to remove the profile to evacuate the chip, after each punching operation.

Pour pallier ces inconvénients et permettre le poinçonnage de profilés de formes complexes, diverses techniques ont été mises au point visant à permettre un déplacement du poinçon suivant une direction différente de la direction de déplacement du coulisseau. A titre d'exemple, une telle disposition est notamment décrite dans l'US-A- 2 421 864. Mais dans ce cas, le mouvement de l'ensemble mécanique agissant sur le coulisseau, nécessite un déplacement oblique par rapport à la table de montage, ce qui ne permet pas un guidage sûr et précis de ce coulisseau et des poinçons actionnés par ce dernier.To overcome these drawbacks and allow the punching of profiles of complex shapes, various techniques have been developed to allow movement of the punch in a direction different from the direction of movement of the slide. For exemple, such an arrangement is described in particular in US-A-2 421 864. But in this case, the movement of the mechanical assembly acting on the slide requires an oblique movement relative to the mounting table, which does not allow not a safe and precise guidance of this slide and the punches actuated by the latter.

La présente invention se propose de fournir un outil de presse permettant de déplacer les poinçons suivant une direction différente de la direction de travail de cette presse, cet outil s'affranchissant des inconvénients de l'état de la technique précité.The present invention proposes to provide a press tool making it possible to move the punches in a direction different from the working direction of this press, this tool overcoming the drawbacks of the aforementioned prior art.

A cet effet, l'objectif essentiel de l'invention est de fournir un outil, d'un seul tenant, apte à être monté sur une presse classique, et possédant un système de transformation de mouvement permettant de travailler suivant une direction quelconque par rapport à la direction de travail de la presse, sans occasionner de pertes de puissance lors de la transmission de l'effort initial de cette presse.To this end, the essential objective of the invention is to provide a tool, in one piece, capable of being mounted on a conventional press, and having a movement transformation system making it possible to work in any direction relative to to the working direction of the press, without causing power losses during the transmission of the initial force of this press.

Un autre objectif est de fournir un outil doté de plusieurs postes de travail porteurs chacun d' un ou plusieurs poinçons dont les directions de déplacement sont indépendantes les unes par rapport aux autres.Another objective is to provide a tool provided with several work stations each carrying one or more punches whose directions of movement are independent with respect to each other.

Un autre objectif est de fournir un outil de dimensions réduites intégrant un système de transformation de mouvement de faible encombrement.Another objective is to provide a tool of reduced dimensions integrating a movement transformation system of small bulk.

Un autre objectif est de fournir un outil doté d'un dispositif de sélection centralisée des différents poinçons.Another objective is to provide a tool provided with a centralized selection device for the various punches.

Un autre objectif est de fournir un outil doté d'un système d'accrochage des poinçons permettant un montage et un démontage de ces poinçons à partir de la face côte matrice des porte-poinçons, et ne présentant aucune partie en relief par rapport à la base de ces porte-poinçons.Another objective is to provide a tool fitted with a punch attachment system allowing assembly and disassembly of these punches from the matrix side face of the punch holders, and having no raised portion relative to the base of these punch holders.

Un autre objectif est de fournir un outil doté de porte-poinçons de faible section et autorisant un montage flottant d'un ou de plusieurs poinçons, le système d' accrochage de ces poinçons autorisant en outre une orientation rigoureuse des poinçons de forme.Another objective is to provide a tool provided with punch holders of small section and authorizing a floating mounting of one or more punches, the system for attaching these punches further authorizing a rigorous orientation of the punches.

(Pour simplifier la description, l'outil sera décrit dans sa position normale de montage sur une presse, les termes "supérieur", "inférieur", "avant", "latéral", étant utilisés pour définir les faces de cet outil vues par une personne se trouvant devant cette presse. En outre, le terme "poinçon" est utilisé dans son sens large, et désigne un outil apte à réaliser des opérations de matriçage, de découpage, d'estampage, d'emboutissage...).(To simplify the description, the tool will be described in its normal mounting position on a press, the terms "upper", "lower", "front", "lateral", being used to define the faces of this tool seen by a person in front of this press. In addition, the term "punch" is used in its broad sense, and designates a tool capable of carrying out stamping, cutting, stamping, stamping operations, etc.).

L'outil, visé par l'invention, est du type comportant au moins une matrice et un poinçon, et est destiné à être monté sur une machine, telle qu'en particulier une presse, dotée d'un table de montage et d'un coulisseau mobile par rapport à ladite table de montage ; cet outil, adapté pour permettre de déplacer chaque poinçon selon une direction déterminée, différente de la direction de déplacement du coulisseau, comprenant un ensemble-poussoir adapté pour être fixé sur le coulisseau, un corps doté de moyens de guidage de l'ensemble-poussoir et adapté pour être fixé sur la table de montage, au moins un poste de travail porté par le corps et comportant une matrice, au moins un porte-poinçon mobile par rapport à ladite matrice et des moyens de guidage de chaque porte-poinçon orientés selon une direction déterminée, différente de la direction de déplacement de l'ensemble-poussoir, et, associé à chaque porte-poinçon, un dispositif de renvoi reliant ledit porte-poinçon à l'ensemble-poussoir et adapté pour engendrer un déplacement dans les deux sens dudit porte-poinçon le long de ses moyens de guidage lors de l'actionnement du coulisseau, et se caractérise en ce que chaque dispositif de renvoi comprend un basculeur articulé autour d'un axe de rotation porté par le corps, ledit basculeur étant relié respectivement à l'ensemble-poussoir et à un porte-poinçon, de façon à être entraîné en rotation lors d'un déplacement dudit ensemble poussoir et à engendrer un déplacement du porte-poinçon correspondant le long de ses moyens de guidage.
The tool, targeted by the invention, is of the type comprising at least one die and one punch, and is intended to be mounted on a machine, such as in particular a press, provided with an assembly table and a slide movable relative to said mounting table; this tool, adapted to allow each punch to be moved in a determined direction, different from the direction of movement of the slider, comprising a pusher assembly adapted to be fixed on the slider, a body provided with means for guiding the pusher assembly and adapted to be fixed on the assembly table, at least one work station carried by the body and comprising a die, at least one punch holder movable relative to said matrix and means for guiding each punch holder oriented according to a determined direction, different from the direction of movement of the pusher assembly, and, associated with each punch holder, a deflection device connecting said punch holder to the pusher assembly and adapted to generate a displacement in the two direction of said punch holder along its guide means when the slide is actuated, and is characterized in that each return device comprises an articulated rocker é around an axis of rotation carried by the body, said rocker being connected respectively to the pusher assembly and to a punch holder, so as to be driven in rotation during movement of said pusher assembly and to generate a displacement of the corresponding punch holder along its guide means.

Cet outil, d'un seul tenant, intètre donc, à la fois l'ensemble-poussoir destiné à transmettre l'effort du coulisseau, le ou les postes de travail, et le dispositif de transformation du mouvement. En outre, les moyens de guidage de chaque porte-poinçon sont indépendants les uns des autres et le déplacement de ces porte-poinçons est engendré par des dispositifs de renvoi, eux-mêmes indépendants les uns des autres. On conçoit donc facilement que chaque porte-poinçon, et notamment les porte-poinçons d'un même poste de travail, peuvent être déplacés selon des directions déterminées, différentes d'un porte-poinçon à l'autre.This tool, in one piece, therefore, is both the push-button assembly intended to transmit the force of the slide, the workstation or workstations, and the movement transformation device. In addition, the guide means of each punch holder are independent of each other and the movement of these punch holders is generated by deflection devices, themselves independent of each other. It is therefore easily understood that each punch holder, and in particular the punch holders of the same work station, can be moved in determined directions, different from one punch holder to another.

La détermination de l'angle d'inclinaison entre la direction de déplacement du coulisseau de la machine et l'axe longitudinal des logements de guidage de ces porte-poinçons, sera déterminée en fonction de l'encombrement des profilés et sera adaptée pour permettre l'évacuation des coupeux après poinçonnage. Cette possibilité d'adapter l'angle de travail des poinçons en fonction de la forme des profilés, permet donc de résoudre les problèmes ci-dessus évoqués, au moyen d'un outil de faible encombrement apte à être monté sur une presse classique dotée d'un coulisseau mobile selon une direction orthogonale à la table de montage. L'inclinaison des postes de travail pouvant être adaptée aux conditions requises de travail, l'ensemble-poussoir est, en outre, préférentiellement fixé sur le coulisseau de façon à être entraîné selon une direction parallèle à la direction de déplacement de ce coulisseau.The determination of the angle of inclination between the direction of movement of the slide of the machine and the longitudinal axis of the guide housings of these punch holders will be determined according to the size of the profiles and will be adapted to allow the '' cutter evacuation after punching. This possibility of adapting the working angle of the punches as a function of the shape of the profiles, therefore makes it possible to solve the problems mentioned above, by means of a compact tool able to be mounted on a conventional press equipped with 'a slide movable in a direction orthogonal to the assembly table. The inclination of the work stations can be adapted to the required working conditions, the pusher assembly is also preferably fixed on the slider so as to be driven in a direction parallel to the direction of movement of this slider.

Selon un mode de réalisation préférentiel, chaque dispositif de renvoi comprend un basculeur articulé autour d'un axe de rotation porté par le corps, ledit basculeur étant relié respectivement à l'ensemble-poussoir et à un porte-poinçon, de façon à être entraîné en rotation lors d'un déplacement dudit ensemble-poussoir et à engendrer un déplacement du porte-poinçon correspondant le long de ses moyens de guidage.According to a preferred embodiment, each return device comprises an articulated rocker about an axis of rotation carried by the body, said rocker being connected respectively to the pusher assembly and to a punch holder, so as to be driven in rotation during movement of said pusher assembly and to generate a displacement of the corresponding punch holder along its guide means.

Généralement, chaque basculeur comprend deux lumières ménagées respectivement en regard de l'ensemble-poussoir et d'un porte-poinçon. L'ensemble-poussoir et chaque porte-poinçon sont, quant à eux, dotés d'axes de guidage logés dans les lumières précitées, lesdits axes de guidage étant de formes adaptées pour être guidées selon une trajectoire rectiligne à l'intérieur desdites lumières, lors d'une rotation du basculeur.Generally, each rocker comprises two openings respectively arranged opposite the pusher assembly and a punch holder. The push-button assembly and each punch holder are, for their part, provided with guide pins housed in the aforementioned slots, said guide pins being of shapes suitable for being guided along a rectilinear trajectory inside said slots, during a rotation of the rocker.

Ainsi, l'effort initial du coulisseau est transféré intégralement vers le porte-poinçon, sans perte de puissance, par l'effet d'une simple rotation du basculeur. En outre, le basculeur, de faibles dimensions, peut être logé dans un emplacement réduit et n'entraîne pas un surdimensionnement de l'outil. Cette dernière considération rend préférentiel le choix d'un basculeur par rapport, notamment, à un dispositif de renvoi utilisant un système de pignons. En effet, en raison de l'encombrement réduit, la denture de ces pignons serait trop petite et présenterait une résistance trop faible.Thus, the initial force of the slide is transferred entirely to the punch holder, without loss of power, by the effect of a simple rotation of the rocker. In addition, the rocker, of small dimensions, can be housed in a reduced location and does not cause the tool to be oversized. This latter consideration makes it preferable to choose a rocker in relation, in particular, to a deflection device using a pinion system. Indeed, due to the reduced size, the teeth of these pinions would be too small and would have too low a resistance.

Selon une autre caractéristique de l'invention, l'ensemble-poussoir est constitué d'un organe d'attache apte à être fixé au coulisseau, et sous lequel s'étendent une pluralité de pistons, chacun relié à un porte-poinçon au moyen du dispositif de renvoi correspondant.According to another characteristic of the invention, the pusher assembly consists of an attachment member able to be fixed to the slide, and under which extend a plurality of pistons, each connected to a punch holder by means the corresponding return device.

Cet organe d'attache est, en outre, préférentiellement constitué de deux pièces, inférieure et supérieure, démontables, adaptées pour maintenir pincées, dans leur position assemblée, l'extrémité supérieure des pistons dotés, à cet effet, d'une tête de section supérieure au corps de ces pistons.This attachment member is also preferably made up of two parts, lower and upper, which can be dismantled, adapted to keep pinched, in their assembled position, the upper end of the pistons provided, for this purpose, with a section head. greater than the body of these pistons.

Lorsque l'outil comporte au moins deux postes de travail dotés chacun d'au moins deux porte-poinçons, ce dernier est avantageusement doté d'un organe de sélection centralisé permettant de choisir le ou les poinçons de chaque poste de travail activés lors d'un déplacement du coulisseau. A cet effet, la pièce supérieure de l'organe d'attache comporte, en regard d'au moins deux têtes de pistons reliés, chacun, à un porte-poinçon d'un poste de travail différent, une rainure transversale de forme conjuguée desdites têtes de piston. L'organe de sélection est, quant à lui, doté de registres de formes adaptées pour se loger dans chaque rainure précitée, ledit organe étant mobile entre une position active où chaque registre est logé dans une rainure et une position passive où chaque registre est retiré desdites rainures.When the tool comprises at least two work stations each provided with at least two punch holders, the latter is advantageously provided with a selection member centralized allowing to choose the punch or punches of each workstation activated during a displacement of the slide. To this end, the upper part of the attachment member comprises, opposite at least two piston heads each connected to a punch holder of a different work station, a transverse groove of conjugate shape of said piston heads. The selection member is, for its part, provided with registers of shapes adapted to be housed in each aforementioned groove, said member being movable between an active position where each register is housed in a groove and a passive position where each register is removed. said grooves.

Cet organe de sélection centralisé permet donc de supprimer toute source d'erreurs, dans la sélection des poinçons utilisés, notamment lors de la fabrication d'une série de châssis, nécessitant le même type d'équerres pour l'assemblage de profilés, coupés en onglet. Cette sélection centralisée est également nécessaire lors d'assemblages en coupe droite, en fonction de la configuration des profilés.This centralized selection member therefore makes it possible to eliminate any source of errors, in the selection of the punches used, in particular during the manufacture of a series of frames, requiring the same type of brackets for the assembly of profiles, cut in tab. This centralized selection is also necessary during straight section assemblies, depending on the configuration of the profiles.

Afin de permettre les montages et démontages des poinçons, les postes de travail sont, en outre, dotés de matrices amovibles montées sur un support de matrice. Les moyens de guidage des portes-poinçons sont, quant à eux, préférentiellement constitués de logements de forme conjuguée de ces porte-poinçons, et débouchant au droit d'une face latérale du support de matrice, en regard de ladite matrice. Les poinçons montés sur l'extrémité de ces porte-poinçons sont donc accessibles, côté matrice, après démontage de cette dernière et ne nécessitent donc pas lors de leur changement, un démontage du mécanisme.In order to allow the punches to be assembled and disassembled, the work stations are also provided with removable dies mounted on a die support. The means for guiding the punch holders are, for their part, preferably made up of housings of conjugate shape of these punch holders, and opening out in line with a lateral face of the die support, facing said die. The punches mounted on the end of these punch holders are therefore accessible, on the die side, after disassembly of the latter and therefore do not require, when they are changed, disassembly of the mechanism.

Par ailleurs, l'extrémité de chaque porte-poinçon présente, préférentiellement, la forme d'au moins une chape, chacune de ces chapes comportant deux rainures transversales en regard, ménagées chacune dans une aile de ladite chape, à distance de l'extrémité desdites ailes. Chaque poinçon est quant à lui, doté d'une collerette de forme adaptée pour se loger de façon amovible dans les rainures d'une chape précitée.Furthermore, the end of each punch holder preferably has the shape of at least one yoke, each of these yokes having two opposite transverse grooves, each formed in a wing of said yoke, at a distance from the end said wings. Each punch is in turn provided with a shaped collar adapted to be housed in a removable manner in the grooves of an aforementioned yoke.

Ce système d'accrochage des poinçons permet donc d'assembler ces derniers sur des porte-poinçons de faible section, donc d'encombrement réduit ; il permet également d'utiliser des poinçons dont la section peut être identique à la section de ces porte-poinçons. En outre, les porte-poinçons ne sont pourvus d'aucun organe de fixation faisant saillie sur leur paroi externe, et peuvent donc coulisser librement à l'intérieur de leurs logements de guidage.This punch attachment system therefore makes it possible to assemble them on small punch holders. section, therefore of reduced bulk; it also allows the use of punches, the section of which can be identical to the section of these punch holders. In addition, the punch holders are not provided with any fixing member projecting from their external wall, and can therefore slide freely inside their guide housings.

Par ailleurs, il est à noter que ce mode d'accrochage des poinçons autorise la fixation d'un ou de plusieurs poinçons sur un même porte-poinçon.Furthermore, it should be noted that this mode of attachment of the punches allows the attachment of one or more punches on the same punch holder.

Selon un mode de réalisation préférentiel, chaque poinçon est doté d'une queue de centrage de forme adaptée pour se loger dans un trou borgne débouchant dans le fond de la chape de chaque porte-poinçon. La collerette de chaque poinçon présente quant à elle une forme dissymétrique allongée, adaptée pour permettre sa rotation entre une position de travail où collerette est engagée dans les rainures de la chape, et une position de démontagé où ladite collerette est orientée de façon à pouvoir coulisser entre les ailes de ladite chape ; l'outil comprend en outre un organe de blocage apte à maintenir ladite collerette dans sa position de travail.According to a preferred embodiment, each punch is provided with a centering tail of shape adapted to be housed in a blind hole opening into the bottom of the yoke of each punch holder. The collar of each punch has an elongated asymmetrical shape, adapted to allow its rotation between a working position where the collar is engaged in the grooves of the yoke, and a disassembled position where said collar is oriented so that it can slide. between the wings of said yoke; the tool further comprises a locking member capable of holding said flange in its working position.

Le trou borgne ménagé dans le fond de la chape du porte-poinçon permet d'assurer le centrage du poinçon, le dégagement de ce dernier étant permis par la forme dissymétrique de la collerette. En outre, grâce à cette disposition, le poinçon peut être avantageusement monté flottant, d'une part en prévoyant une queue de centrage de section légèrement inférieure à celle du trou borgne et, d'autre part en ménageant un faible jeu entre l'organe de blocage et la collerette. L'autocentrage du poinçon par rapport à la matrice est ainsi amélioré.The blind hole in the bottom of the clevis of the punch holder ensures centering of the punch, the release of the latter being allowed by the asymmetrical shape of the collar. In addition, thanks to this arrangement, the punch can be advantageously mounted floating, on the one hand by providing a centering tail of section slightly smaller than that of the blind hole and, on the other hand by providing a small clearance between the member. lock and collar. The self-centering of the punch relative to the die is thus improved.

L'invention sera mieux comprise à la lecture de la description détaillée qui suit et à l'examen des dessins annexés qui en présentent, à titre d'exemples non limitatifs, deux modes de réalisation; ; sur ces dessins qui font partie intégrante de la présente description :

  • la figure 1 est une coupe transversale, par un plan vertical, d'un outil conforme à un mode de réalisation de l'invention, doté de deux postes de travail agencés de façon à permettre de déplacer les porte-poinçons suivant des directions de travail faisant des angles et de valeurs prédéterminées et quelconques avec la direction de travail de la presse,
  • la figure 2 est une coupe transversale par un plan vertical A-A, d'un mode particulier de réalisation de cet outil, dans lequel les porte-poinçons sont déplacés suivant une direction orthogonale à la direction de travail de la presse,
  • la figure 3 est une coupe longitudinale axiale, par un plan vertical B-B, de cet outil,
  • la figure 4 en est une coupe horizontale par un plan C-C,
  • la figure 5 en est une coupe horizontale par un plan D-D,
  • la figure 6a est une vue de côté, partielle, représentant le dispositif d'accrochage d'un poinçon sur le porte-poinçon, dans la position de travail de ce poinçon,
  • la figure 6b est une coupe transversale, par un plan E-E de l'extrémité d'un porte-poinçon,
  • la figure 6c est une vue de côté, partielle, représentant le dispositif d'accrochage d'un poinçon sur le porte-poinçon, dans la position de démontage de ce poinçon,
  • la figure 7 est une coupe transversale, par un plan vertical F-F, représentant l'ensemble poinçon avant-matrice avant de cet outil.
The invention will be better understood on reading the detailed description which follows and on examining the appended drawings which present, by way of nonlimiting examples, two embodiments; ; on these drawings which form an integral part of this description:
  • Figure 1 is a cross section, through a vertical plane, of a tool according to an embodiment of the invention, provided with two work stations arranged so as to allow move the punch holders in working directions at any predetermined angles and values with the working direction of the press,
  • FIG. 2 is a cross section through a vertical plane AA, of a particular embodiment of this tool, in which the punch holders are moved in a direction orthogonal to the working direction of the press,
  • FIG. 3 is an axial longitudinal section, through a vertical plane BB, of this tool,
  • FIG. 4 is a horizontal section through a plane CC,
  • FIG. 5 is a horizontal section through a plane DD,
  • FIG. 6a is a partial side view showing the device for hooking a punch on the punch holder, in the working position of this punch,
  • FIG. 6b is a cross section, through a plane EE of the end of a punch holder,
  • FIG. 6c is a partial side view showing the device for attaching a punch to the punch holder, in the disassembly position of this punch,
  • Figure 7 is a cross section through a vertical plane FF, showing the punch assembly before the front die of this tool.

Les outils représentés respectivement aux figures 1 et 2 à 7 sont destinés à être montés sur une presse. Cette presse comprend une table de montage 1 et un coulisseau 2 mobile, selon une direction orthogonale, par rapport à cette table (ces deux éléments sont schématisés en traits discontinus aux figures 1 et 2). La table de montage 1 comporte une rainure 3 dotée d'une face latérale rectifiée, et des doigts de serrage 4 assurant le blocage de l'outil sur cette table. Le coulisseau 2 comporte, quant à lui, en regard de la table de montage, une rainure 5 et des tirants de serrage 6 assurant le maintien de l'outil sur ce coulisseau.The tools shown in Figures 1 and 2 to 7 respectively are intended to be mounted on a press. This press comprises an assembly table 1 and a slide 2 movable, in an orthogonal direction, relative to this table (these two elements are shown diagrammatically in broken lines in FIGS. 1 and 2). The mounting table 1 has a groove 3 with a rectified side face, and clamping fingers 4 ensuring the locking of the tool on this table. The slider 2 has, meanwhile, facing the mounting table, a groove 5 and tightening tie rods 6 ensuring the maintenance of the tool on this slide.

Chaque outil se compose de trois parties essentielles : un corps 7 adapté pour être fixé sur la table de montage, un ensemble-poussoir 8, 9, 10 adapté pour être fixé sur le coulisseau, et mobile par rapport au corps 7, selon une direction orthogonale à la table de montage 1, et deux postes de travail 11, 12 portés par le corps 7, de part et d'autre de l'ensemble-poussoir 8, 9, 10, chacun des postes de travail comportant deux porte-poinçons.Each tool consists of three essential parts: a body 7 adapted to be fixed on the assembly table, a pusher assembly 8, 9, 10 adapted to be fixed on the slide, and movable relative to the body 7, in a direction orthogonal to the assembly table 1, and two work stations 11, 12 carried by the body 7, on either side of the pusher assembly 8, 9, 10, each of the work stations comprising two punch holders .

Afin d'assurer la fixation de l'outil sur la table de montage 1, le corps 7 est doté d'un tenon 13 en saillie sous sa face inférieure. Ce tenon 13, de forme conjuguée de la rainure 3 de la table 1, possède une face latérale rectifiée destinée à venir en appui contre la face rectifiée de cette rainure 3. La face latérale opposée du tenon 13 est dotée d'une rainure 14 en forme de demi-queue d'aronde, conjuguée de l'extrémité des doigts de serrage 4. De même, l'ensemble-poussoir possède un organe d'attache 8, 9 sur le coulisseau 2, doté d'un tenon 15 de forme conjuguée de la rainure 5 de ce coulisseau. La face supérieure de ce tenon 15 comporte, en outre, deux alésages 16 taraudés, d'un diamètre conjugué de l'extrémité filetée des tirants de serrage 6 du coulisseau 2.In order to ensure the attachment of the tool to the mounting table 1, the body 7 is provided with a stud 13 projecting from its underside. This tenon 13, of conjugate shape of the groove 3 of the table 1, has a rectified lateral face intended to come into abutment against the rectified face of this groove 3. The opposite lateral face of the tenon 13 is provided with a groove 14 in shape of half dovetail, conjugate with the end of the clamping fingers 4. Similarly, the pusher assembly has a fastening member 8, 9 on the slide 2, provided with a lug 15 of shape conjugate of the groove 5 of this slide. The upper face of this tenon 15 further comprises two tapped bores 16 with a conjugate diameter of the threaded end of the tightening rods 6 of the slide 2.

Par ailleurs, l'organe d'attache 8, 9 est constitué de deux pièces inférieure 9 et supérieure 8, démontables, solidarisées au moyen de vis de fixation 17. Sous cet organe d'attache s'étendent quatre pistons 10, de formes générales cylindriques, alignés dans le plan de symétrie longitudinal de l'outil.Furthermore, the attachment member 8, 9 consists of two lower parts 9 and upper 8, removable, secured by means of fixing screws 17. Under this attachment member extend four pistons 10, of general shapes cylindrical, aligned in the longitudinal plane of symmetry of the tool.

Ces pistons 10 sont dotés d'une tête 18, de diamètre supérieur au corps de piston, maintenue pincée entre les parties inférieure 9 et supérieure 8 de l'organe d'attache.These pistons 10 are provided with a head 18, of diameter greater than the piston body, kept pinched between the lower 9 and upper 8 parts of the attachment member.

Lors d'un déplacement du coulisseau 2, les pistons 10 sont déplacés en synchronisme et guidés dans des logements 19 de formes conjuguées, ménagés dans le corps 7, orthogonalement à la table de montage 1. Ces logements 19 débouchent, en outre, au niveau de la face inférieure du corps 7, par l'intermédiaire d'un tronçon 20 de section inférieure à la section courante de ces logements.During a displacement of the slide 2, the pistons 10 are moved in synchronism and guided in housings 19 of conjugate shapes, formed in the body 7, orthogonally to the mounting table 1. These housings 19 also open out at the level from the underside of the body 7, via a section 20 of section lower than the current section of these dwellings.

L'ensemble-poussoir est, en outre, doté d'un organe de sélection centralisé permettant de sélectionner le nombre de pistons 10 actionnés lors du déplacement du coulisseau 2. En l'occurence, cette sélection permet d'actionner lors de chaque déplacement du coulisseau 2, soit deux, soit quatre pistons.The pusher assembly is furthermore provided with a centralized selection member making it possible to select the number of pistons 10 actuated during the movement of the slide 2. In this case, this selection makes it possible to actuate each time the slide 2, either two or four pistons.

A cet effet, la pièce supérieure 8 est dotée, en regard de la pièce inférieure 9, de deux rainures transversales 21, séparées par une nervure 24 de hauteur adaptée pour se profiler avec la face inférieure de cette pièce supérieure 8. Ces deux rainures 21 sont ménagées de façon à permettre, chacune, un débattement vertical d'une tête 18 de piston 10, relativement à l'organe d'attache. La nervure 24 vient, quant à elle, pincer la tête 18 du piston 10 positionné entre les deux pistons précités.To this end, the upper part 8 is provided, opposite the lower part 9, with two transverse grooves 21, separated by a rib 24 of a height suitable for profiling with the lower face of this upper part 8. These two grooves 21 are arranged so as to allow, each, a vertical movement of a head 18 of piston 10, relative to the attachment member. The rib 24 comes, as for it, to pinch the head 18 of the piston 10 positioned between the two aforementioned pistons.

L'organe de sélection 22, proprement dit, présente la forme d'un T, dont le montant 22a est positionné en regard de la tête du piston 10 pincé par la nervure 24. A cet effet, cet organe 22 est doté d'une lumière 23 longitudinale de largeur adaptée pour loger cette nervure 24. Les deux ailes 22b sont, en outre, de formes adaptées pour se loger dans les rainures 21 lors d'un déplacement transversal de cet organe de sélection 22 par rapport à l'organe d'attache. Ainsi, cet organe de sélection 22, guidé par la nervure 24, peut être déplacé entre deux positions :

  • une position passive, où les deux ailes 22b de l'organe de sélection 22 sont retirées de la rainure 21 ; dans ce cas, seul le piston 10 maintenu pincé entre les pièces inférieure 8 et supérieure 9 et le piston 10 se trouvant en regard du montant 22a sont actionnés lors d'un déplacement du coulisseau 2 ;
  • une position active où les deux ailes 22b de l'organe de sélection 22 sont introduites dans les rainures 21 ; dans ce cas, les quatre pistons 10 sont actionnés lors d'un déplacement du coulisseau 2.
The selection member 22, proper, has the shape of a T, the upright 22a of which is positioned opposite the head of the piston 10 pinched by the rib 24. For this purpose, this member 22 is provided with a longitudinal lumen 23 of width adapted to accommodate this rib 24. The two wings 22b are, moreover, of shapes adapted to be housed in the grooves 21 during a transverse movement of this selection member 22 relative to the member d 'attached. Thus, this selection member 22, guided by the rib 24, can be moved between two positions:
  • a passive position, where the two wings 22b of the selection member 22 are withdrawn from the groove 21; in this case, only the piston 10 kept pinched between the lower 8 and upper 9 parts and the piston 10 located opposite the upright 22a are actuated during movement of the slider 2;
  • an active position where the two wings 22b of the selection member 22 are introduced into the grooves 21; in this case, the four pistons 10 are actuated during movement of the slider 2.

En outre, la face avant 25 de l'organe de sélection et la face en regard des têtes 18 des pistons 10, présentent une forme biseautée visant à faciliter le coulissement de cet organe 22. Par ailleurs, un poussoir à ressort 26 permet de maintenir l'organe de sélection 22 dans chacune de ses positions.In addition, the front face 25 of the selection member and the opposite face of the heads 18 of the pistons 10 have a bevelled shape intended to facilitate the sliding of this member 22. Furthermore, a spring plunger 26 keeps the selection member 22 in each of its positions.

Le deuxième organe de l'outil consiste en deux postes de travail 11, 12 fixés sur le corps 7 de part et d'autre de l'ensemble-poussoir 8, 9, 10, de façon à permettre, notamment, le guidage de l'organe d'attache 8, 9. Chacun de ces postes de travail comporte un support de matrice 27 sur lequel est fixée, de façon amovible, une matrice représentée schématiquement en 28.The second member of the tool consists of two work stations 11, 12 fixed to the body 7 on either side of the pusher assembly 8, 9, 10, so as to allow, in particular, the guidance of the 'fastening member 8, 9. Each of these work stations comprises a matrix support 27 on which is fixed, in a removable manner, a matrix represented diagrammatically at 28.

Chaque poste de travail 11, 12 comporte également deux porte-poinçons 29, de formes générales cylindriques, se déplaçant dans des logements de guidage 30 de formes conjuguées, débouchant d'une part au niveau d'une face latérale d'un support de matrice 27 et, d'autre part, sensiblement en regard d'un piston 10. En fonction de l'agencement des postes de travail 11, 12, les logements de guidage 30 peuvent ainsi être orientés de façon à déterminer un angle quelconque avec la direction de travail de la presse.Each work station 11, 12 also comprises two punch holders 29, of generally cylindrical shapes, moving in guide housings 30 of conjugate shapes, opening on the one hand at a lateral face of a matrix support 27 and, on the other hand, substantially opposite a piston 10. Depending on the arrangement of the work stations 11, 12, the guide housings 30 can thus be oriented so as to determine any angle with the direction press work.

La transmission du mouvement des pistons 10 s'opère au moyen de basculeurs 31 logés dans des cavités 32 ménagées dans la partie centrale du corps 7 de l'outil, chacune de ces cavités étant obturée par des caches latéraux 33 et supérieurs 34. En outre, porte-poinçons 29 et pistons 10 sont associés de façon que, soit seul un porte-poinçon 29 de chaque poste de travail 11, 12, soit les deux porte-poinçons de chaque poste de travail soient déplacés simultanément, en fonction de la position de l'organe de sélection centralisé 22.Transmission of the movement of the pistons 10 takes place by means of rockers 31 housed in cavities 32 formed in the central part of the body 7 of the tool, each of these cavities being closed by lateral covers 33 and upper 34. Furthermore , punch holders 29 and pistons 10 are combined so that either only one punch holder 29 of each work station 11, 12, or the two punch holders of each work station are moved simultaneously, depending on the position of the centralized selection body 22.

Chacun des basculeurs 31 présente une forme en V et est articulé autour d'un axe de rotation 35, porté par le corps 7 de l'outil. L'angle déterminé par les branches 36, 37 de ces basculeurs est fonction de la direction de déplacement des porte-poinçons 29. Ainsi, lorsque les porte-poinçons 29 sont entraînés suivant une direction orthogonale à la direction de déplacement du coulisseau 2, ces basculeurs présentent une forme en L.Each of the rockers 31 has a V shape and is articulated around an axis of rotation 35, carried by the body 7 of the tool. The angle determined by the branches 36, 37 of these rockers depends on the direction of movement of the punch holders 29. Thus, when the punch holders 29 are driven in a direction orthogonal to the direction of movement of the slider 2, these rockers have an L shape.

L'extrémité de chacune des branches 36, 37 de ces basculeurs 31 présente la forme d'une chape à l'intérieur de laquelle vient se loger, soit l'extrémité d'un porte-poinçon 29, soit un tronçon du corps d'un piston 10. A cet effet, les extrémités des porte-poinçons 29 présentent deux méplats. De même, la paroi périphérique des corps de pistons 10 présente deux épaulements définissant un tronçon présentant deux méplats. En outre, chaque porte-poinçon 29 et le piston 10 correspondant étant agencés de façon à coulisser l'un contre l'autre lors de l'actionnement du coulisseau 2, un des méplats respectifs précités de ces porte-poinçons et pistons est prolongé de façon à déterminer une surface de contact plane entre ces deux éléments.The end of each of the branches 36, 37 of these rockers 31 have the shape of a yoke inside which is housed, either the end of a punch holder 29, or a section of the body of a piston 10. For this purpose, the ends of the punch holders 29 have two flats. Similarly, the peripheral wall of the piston bodies 10 has two shoulders defining a section having two flats. In addition, each punch holder 29 and the corresponding piston 10 being arranged to slide one against the other during the actuation of the slider 2, one of the aforementioned respective flats of these punch and piston holders is extended by so as to determine a plane contact surface between these two elements.

Le liaison proprement dite entre basculeurs 31 et porte-poinçon 29 ou piston 10 est réalisée au moyen d'axes de guidage 38, 39 traversant ces porte-poinçons et pistons et venant se loger dans des gorges 40, 41 ménagées au niveau de l'extrémité longitudinale de chacune des branches 36, 37 du basculeur 31. Les formes respectives de ces axes de guidage 38, 39 et de ces gorges 40, 41 sont déterminées de façon que, lors d'une rotation du basculeur 31 autour de son axe de rotation 35, chaque axe de guidage 38, 39 soit guidé rectilignement dans une gorge 40, 41, entraînant le déplacement du porte-poinçon 29 le long de ses moyens de guidage 30. Ce système de transformation de mouvement, de faible encombrement, permet donc de réaliser des outils de faible taille. De plus, les ensembles porte-poinçon 29-basculeur 31-piston 10 étant indépendants les uns des autres, il est facilement possible d'orienter chaque logement de guidage 30 selon une direction déterminée indépendante de l'orientation des logements de guidage voisins.The actual connection between rockers 31 and punch holder 29 or piston 10 is produced by means of guide pins 38, 39 passing through these punch holders and pistons and being housed in grooves 40, 41 formed at the level of the longitudinal end of each of the branches 36, 37 of the rocker 31. The respective shapes of these guide pins 38, 39 and of these grooves 40, 41 are determined so that, during a rotation of the rocker 31 around its axis of rotation 35, each guide pin 38, 39 is guided rectilinearly in a groove 40, 41, causing the movement of the punch holder 29 along its guide means 30. This movement transformation system, of small size, therefore allows to make small tools. In addition, the punch holder 29-rocker 31-piston 10 assemblies being independent of each other, it is easily possible to orient each guide housing 30 in a determined direction independent of the orientation of the neighboring guide housings.

En raison de la présence des basculeurs 31, les poinçons 42 portés par les porte-poinçons 29 doivent être accessibles côté matrice 28, en vue de permettre leur montage ou leur démontage.Due to the presence of the rockers 31, the punches 42 carried by the punch holders 29 must be accessible on the die side 28, in order to allow their assembly or disassembly.

A cet effet, l'extrémité de chaque logement de guidage 30 présente une face ouverte s'ouvrant au niveau de la face supérieure d'un support de matrice 27. L'extrémité correspondante des porte-poinçons 29 est dotée, quant à elle, d'un méplat 43 de façon à affleurer cette face supérieure du support de matrice 27.To this end, the end of each guide housing 30 has an open face opening at the upper face of a die support 27. The corresponding end of the punch holders 29 is, for its part, of a flat 43 so as to be flush with this upper face of the matrix support 27.

Cette extrémité des portes-poinçons 29 présente, en outre, la forme d'une chape 44 dont chacune des ailes est dotée, intérieurement, d'une rainure 45 transversale, ménagée à distance de l'extrémité de cette chape. De plus, un trou borgne 46 est ménagé dans le fond de cette chape 44.This end of the punch holders 29 has, moreover, the form of a yoke 44 each of the wings of which has, internally, a transverse groove 45, formed at a distance from the end of this yoke. In addition, a blind hole 46 is formed in the bottom of this yoke 44.

Chaque poinçon 42 possède, quant à lui, une queue de centrage 47 de forme adaptée pour se loger dans le trou borgne 46 précité. Le blocage en translation de ces poinçons 42 est assuré au moyen d'une collerette 48 de forme adaptée pour venir se loger dans les rainures 45 de la chape 44 des porte-poinçons 29. Cette collerette 48 présente, en outre, deux méplats, permettant son coulissement entre les ailes de la chape 44.Each punch 42 has, for its part, a centering tail 47 of a shape adapted to be housed in the abovementioned blind hole 46. The locking in translation of these punches 42 is ensured by means of a flange 48 of a shape suitable for being received in the grooves 45 of the yoke 44 of the punch holders 29. This flange 48 has, in addition, two flats, allowing its sliding between the wings of the yoke 44.

Ainsi, suivant l'orientation de la collerette 48, le poinçon 42 peut soit coulisser à l'intérieur de la chape 44 lors des opérations de montage ou démontage, soit être bloqué en translation après rotation d'un quart de tour de cette collerette. Dans cette dernière position, une plaquette d'obturation 49 est fixée sur le face supérieure du support de matrice 27 de façon a prendre appui sur les méplats respectifs 43 du porte-poinçon et de la collerette 42.Thus, according to the orientation of the collar 48, the punch 42 can either slide inside the yoke 44 during assembly or disassembly operations, or be blocked in translation after rotation of this quarter collar. In this latter position, a sealing plate 49 is fixed on the upper face of the die support 27 so as to bear on the respective flats 43 of the punch holder and of the flange 42.

Un montage flottant est, en outre, assuré en prévoyant un léger jeu d'une part entre la queue de centrage 47 et le trou borgne 46 et, d'autre part, entre la plaquette d'obturation 49 et la collerette 42.A floating mounting is also ensured by providing a slight clearance on the one hand between the centering tail 47 and the blind hole 46 and, on the other hand, between the closure plate 49 and the flange 42.

En dernier lieu, l'outil est doté d'un ensemble matrice avant 50-poinçon avant 51 destiné à découper, selon un mode de découpe déterminé, l'extrémité d'un profilé. Cet ensemble est destiné, notamment, à pratiquer une découpe dans une toile de ce profilé, en vue de permettre le passage de la tringlerie d'un châssis de fenêtre.Finally, the tool is provided with a front die assembly 50-front punch 51 intended to cut, according to a determined cutting mode, the end of a profile. This assembly is intended, in particular, to make a cut in a fabric of this profile, in order to allow the passage of the linkage of a window frame.

Le poinçon avant 51, fixé sur le pièce inférieure 9 de l'organe d'attache au moyen d'une vis de fixation 52, présente une forme parallélépipédique rectangle. L'extrémité basse 53 de ce poinçon avant 51 présente une largeur inférieure à la largeur de la partie courante, et est guidée dans un logement de guidage 54 ménagé, en regard du corps 7 de l'outil, dans la matrice avant 50 fixée sur ce corps 7 au moyen d'une vis de fixation 55.The front punch 51, fixed to the lower part 9 of the attachment member by means of a fixing screw 52, has a rectangular parallelepiped shape. The lower end 53 of this front punch 51 has a width less than the width of the running part, and is guided in a guide housing 54 arranged, facing the body 7 of the tool, in the front die 50 fixed to this body 7 by means of a fixing screw 55.

En outre, ce logement 54 possède un fond incliné 54a, débouchant en partie basse au niveau d'une ouverture ménagée dans une des faces latérales de la matrice avant 50. Cette dernière disposition permet d'évacuer, par gravité, les copeaux provenant de la découpe.In addition, this housing 54 has an inclined bottom 54a, opening at the bottom at an opening in one of the side faces of the front die 50. This latter arrangement makes it possible to evacuate, by gravity, the chips coming from the cutting.

Claims (14)

  1. A tool of the kind comprising at least one die (28) and at least one punch (42), the tool being fittable to a machine such as more particularly a press having a work table (1) and a slider (2) movable relatively thereto, the tool permitting movement of each punch (42) in a predetermined direction other than the direction of slider movement, the tool comprising in combination a tappet assembly (8, 9, 10) fixable to the slider (2), a body (7) having means (19) for guiding the tappet assembly (8 , 10) and fixable to the work table (1), at least one work station (11, 12) borne by the body (7) and having a die (28), at least one punch holder (29) movable relatively to the die and means (30) for guiding each punch holder (29), the means (30) being oriented in a predetermined direction other than the direction of movement of the tappet assembly (8 , 10) and, associated with each punch holder (29), a motion-direction-changing device (31, 35, 41) connecting the punch holder (29) to the tappet assembly (8 , 10) and adapted to move the punch holder (29) in both directions along its guide means (30) in response to operation of the slider (2), characterised in that each motion-direction-changing device (31, 35 , 41) comprises a rocker (31) pivoted around a spindle (35) carried by the body (7), the rocker (31) being so connected to the tappet assembly (8 , 10) and to a punch holder (29) as to be rotated in response to a movement of such assembly and to produce a movement of the punch holder along its guide means (30).
  2. A tool according to claim 1 wherein the slider (2) is movable in a direction perpendicular to the work table (1), the tappet assembly (8, 10) being so secured to the slider (2) as to be moved in a direction parallel to the direction of slider movement.
  3. A tool according to claim 2, characterised in that:

    each rocker (31) is formed with two slots (40, 41) respectively disposed opposite the tappet assembly (8 - 10) and opposite a punch holder (29), and

    the tappet assembly (8 , 10) and each punch holder (29) have guide spindles (38, 39) received in the slots (40, 41), the guide spindles being so shaped as to be guided on a straight path in the slots in response to a rotation of the rocker (31).
  4. A tool according to any of the previous claims 1 to 3, characterised in that the tappet assembly (8 , 10) comprises an attaching element (8, 9) which is adapted to be secured to the slider (2) and below which a number of pistons (10) are disposed, each such piston being connected to a punch holder (29) by means of the corresponding motion-direction-changing device (31, 35 - 41).
  5. A tool according to claim 4, characterised in that each piston (10) comprises a head (18) of larger cross-section than its body, , the attaching element (8, 9) on the slider (2) being embodied by two demountable parts, namely a bottom part (9) and a top part (8), adapted to keep the piston heads clamped in their assembled position.
  6. A tool according to claim 5 comprising at least two work stations (11, 12) each having at least two punch holders (29), characterised in that the top part (8) of the attaching element is formed,
    opposite at least two heads (18) of pistons (10), each connected to a punch holder (29) of a different work station, with a transverse groove (21) of companion shape to the piston heads (18), the tool having a centralized selector element (22) having registers (22b) shaped to be received in each groove (21), the selector (22) being movable between an operative position, in which each register (22b) is received in a groove (21), and an inoperative position, in which each register is disengaged from the grooves.
  7. A tool according to any of claims 4 or 6 or 7, characterised in that the means for guiding the tappet assembly (8 - 10) are formed with recesses (19) of companion shape to the pistons (10), each recess (19) extending to that surface of the body (7) which is opposite the work table (1), such surface being the underside thereof, by way of a portion (20) of smaller cross-section than the normal cross-section of the recesses (19).
  8. A tool according to any of the claims 1 to 7 for fitting to a press comprising a work table (1) formed with a groove (3) having a ground side surface, a slider (2) formed with a groove (5) opposite the work table (1) and clamping means to retain a tool in the grooves in the work table (1) and slider (2), the tool comprising:

    a tenon (13) projecting from the underside of the body (7) and being of companion shape to the groove (3) in the work table (1) and having a ground side surface adapted to bear on the ground side surface of the groove (3), and

    a tenon (15) projecting from the top surface of the attaching element (8, 9) and being of companion shape to the groove (5) in the slider (2).
  9. A tool according to any of claims 4 to 8, characterised in that it comprises:

    a front punch (51) so secured to the attaching element (8, 9) as to slide on the front surface of the tool body (7), the punch having a bottom end (55) shaped to allow a partial cut-out of predtermined shape of one end of a section member, and

    a front die (50) secured to the front surface of the tool body (7) opposite the front punch (51), the die being formed with a recess (54) for guiding the bottom end (53) of the front punch (51).
  10. A tool according to claim 9, characterised in that the recess (54) has an inclined base (54a) which extends at the bottom to a side surface of the front die (50) to facilitate chip removal.
  11. A tool according to any of the claims 1 to 10, in which each work station (11, 12) has a releasable die (28) disposed on a die support (27), the tool being characterised in that:

    the means for guiding the punch holders (29) are formed with recesses (30) of companion shape to the punch holders and extending to near a side surface of the die support (27) opposite the die;

    the end of each punch holder (29) is in the form of at least one yoke (44), each such yoke being formed with two opposite transverse grooves (45) disposed one each in an arm of the yoke at a distance from the end of the arms, and

    each punch (42) has a collar (48) shaped to be releasably received in the grooves (45) of a yoke (44).
  12. A tool according to claim 11, characterised in that:

    each punch (42) has a centring tail (47) shaped to be received in a blind aperture (46) opening on to the base of the yoke (44) of each punch holder (29), and

    the collar (48) of each punch (42) is of an elongate asymmetrical shape adapted to permit rotation of the punch between an operative position, in which the collar (48) is engaged in the grooves (45) in the yoke (44), and a demounting position, in which the collar (48) is so oriented so as to be slidable between the arms of the yoke, the tool comprising a locking member (49) for retaining the collar in its operative position.
  13. A tool according to claim 12, characterised in that:

    the end of each guide recess (30) has an open surface extending to near the top or bottom surface of the die support (27) while the punch holder (29) and the collar (48) of each punch (42) when in its operative position register with the die support surface, and

    the locking member is in the form of a releasable closure plate (49) so secured to the die support surface (77) as to secure the collar (48) in rotation.
  14. A tool according to claim 13, characterised in that the centring tail (47) of each punch (42) has a cross-section appreciably less than the cross-section of the tail-receiving blind aperture (46), and a space is left between the locking plate (49) and the collar (48) to provide a floating mounting thereof.
EP19870402602 1986-11-19 1987-11-18 Press tool for displacing the punches in a direction which differs from the working direction of the press Expired - Lifetime EP0272175B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8616426A FR2606684B1 (en) 1986-11-19 1986-11-19 PRESS TOOL FOR MOVING PUNCHES FOLLOWING A DIRECTION DIFFERENT FROM THE WORKING DIRECTION OF THE PRESS
FR8616426 1986-11-19

Publications (2)

Publication Number Publication Date
EP0272175A1 EP0272175A1 (en) 1988-06-22
EP0272175B1 true EP0272175B1 (en) 1991-05-08

Family

ID=9341199

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19870402602 Expired - Lifetime EP0272175B1 (en) 1986-11-19 1987-11-18 Press tool for displacing the punches in a direction which differs from the working direction of the press

Country Status (6)

Country Link
EP (1) EP0272175B1 (en)
DE (1) DE3769946D1 (en)
ES (1) ES2022420B3 (en)
FR (1) FR2606684B1 (en)
GR (1) GR3001919T3 (en)
PT (1) PT86158B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2657798A1 (en) * 1990-02-02 1991-08-09 Technal Snc Self-contained (autonomous) tool, especially for drilling or cutting out (off) metal sections
DE10340509A1 (en) 2003-09-03 2005-03-31 Bayerische Motoren Werke Ag Wedge drive tool with mutually adjustable elements for cutting a sheet metal workpiece without cutting in a press

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2421864A (en) * 1945-09-04 1947-06-10 Boeing Aircraft Co Angle punch unit
US3498167A (en) * 1968-02-19 1970-03-03 Walter P Hill Inc Automatic precision numerical controlled punching and shearing machine
DE3025552A1 (en) * 1980-07-05 1982-01-21 Daimler-Benz Ag, 7000 Stuttgart Punching tool for making holes - has punch fitted on swivelling lever with pivot mounted on press holding-down device
US4468995A (en) * 1982-01-11 1984-09-04 Cuprum, S.A. Apparatus for manufacturing frames from aluminum profile rails

Also Published As

Publication number Publication date
GR3001919T3 (en) 1992-11-23
FR2606684A1 (en) 1988-05-20
FR2606684B1 (en) 1989-02-17
PT86158B (en) 1993-08-31
EP0272175A1 (en) 1988-06-22
ES2022420B3 (en) 1991-12-01
PT86158A (en) 1988-12-15
DE3769946D1 (en) 1991-06-13

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