WO1998001288A1 - Punching tool, in particular for punching sheet metal - Google Patents

Punching tool, in particular for punching sheet metal Download PDF

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Publication number
WO1998001288A1
WO1998001288A1 PCT/FR1997/001228 FR9701228W WO9801288A1 WO 1998001288 A1 WO1998001288 A1 WO 1998001288A1 FR 9701228 W FR9701228 W FR 9701228W WO 9801288 A1 WO9801288 A1 WO 9801288A1
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WO
WIPO (PCT)
Prior art keywords
support
punching tool
support structure
tool according
punch
Prior art date
Application number
PCT/FR1997/001228
Other languages
French (fr)
Inventor
Jean-Claude Jeandeaud
Original Assignee
Jeandeaud Jean Claude
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Jeandeaud Jean Claude filed Critical Jeandeaud Jean Claude
Priority to EP97932852A priority Critical patent/EP0912326A1/en
Publication of WO1998001288A1 publication Critical patent/WO1998001288A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D28/00—Shaping by press-cutting; Perforating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/0058—Inclinable presses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/04—Frames; Guides
    • B30B15/047—C-shaped frames

Definitions

  • the present invention relates to a punching tool, intended in particular for punching sheets.
  • Known tools of this type include a striking head, a punch and a die, the whole being mounted inside a support structure.
  • the sheet to be punched is placed between the punch and the die and the striking head acts on the punch to punch the sheet.
  • the punching tools have an inverted U shape, lying horizontally, called a swan neck.
  • the sheet metal to be punched takes place between the two branches of the U, the matrix is at the end of a branch of the U and the punch is located opposite the matrix, at the end of the other branch of the U.
  • the support structure of the tool comprises two side plates in the form of a swan neck, an upper plate and a lower plate. Inside this structure which carries the striking head, the punch and the matrix take place which are connected to each other by an element in the form of a swan neck.
  • the object of the invention is then to provide a punching tool with a lighter but just as rigid structure, in which the change of the punch and of the die can be carried out without difficulty.
  • a punching tool comprising a striking head, at least one punch mounted in a punch holder, a matrix as well as a structure carrying these elements having a general shape of U, also called swan neck , the striking head and the punch holder located at the free end of a branch of the U, facing the matrix located at the free end of the other branch of the U.
  • the structure carrier is a tubular structure, pivotally mounted, about an axis substantially perpendicular to the branches of the U, on a support.
  • the supporting structure is tubular makes it possible to have increased rigidity compared to the punching tools of the prior art, while being lighter. However, this closed structure no longer allows access as on the tools of the prior art at the level of the die and the punch holder.
  • the invention therefore provides for making the pivoting supporting structure, so that after pivoting it is possible to access these elements.
  • the support structure can pivot between a position where the branches of the U are substantially horizontal and a position where they are substantially vertical, in the latter position, the striking head, the punch and the die being at the top of the support structure . Access to these various elements is then easy.
  • the punch holder and the die are removably mounted on the supporting structure.
  • the support structure has two tubular branches of substantially rectangular section connected together by a tubular base of substantially rectangular section.
  • the support on which the supporting structure is mounted is advantageously movable in translation.
  • the support is provided with pads intended to slide on guide rails.
  • the invention proposes that the support is fixed to a toothed belt passing over a grooved control shaft and a driven pulley.
  • a stop is provided on the side of the base of the U, in addition the support structure has on each side a post, and the stop includes a cutout, intended to receive the post when the support structure is against the stop and to guide the support structure during its pivoting.
  • FIG. 1 is a view in longitudinal section thereof, along the section line I-I of FIG. 2,
  • FIG. 2 is a sectional view along the section line II-II of FIG. 1,
  • Figure 3 is a sectional view along the section line III-III of Figure 2
  • Figure 4 is a side view showing the punching tool of Figure 1 in the tilted position.
  • the punching tool shown in FIGS. 1 to 4 comprises a striking head 2, a punch holder 4 provided with a punch 6 and a die 8. All of these elements are mounted in a support structure 10.
  • the supporting structure 10 has an inverted U shape, the branches of which are substantially horizontal. The free space between the branches of the u is intended for the passage of a sheet to be punched. As a result, the gap between the branches is reduced. This form is commonly called "swan neck".
  • the supporting structure 10 comprises an upper branch 12 and a lower branch 14 which are substantially horizontal, as well as a substantially vertical base 16 connecting the two horizontal branches 12, 14. As shown in Figures 1 and 2, the supporting structure 10 is tubular. Each branch and the base are of substantially rectangular sections. A reinforcing wall 18 is provided to separate each branch 12, 14 from the base 16.
  • the upper branch 12 of the support structure carries at its free end the striking head 2 and the punch holder 4, while the other branch 14 door at its free end, facing the punch holder 4, the matrix 8. All of these elements are removably mounted on the support structure 10.
  • the striking head 2 operates with an electric motor.
  • a conventional impact head using a hydraulic cylinder can be used.
  • the striking head 2 has a slide 20 which acts on the punch 6 to punch the sheet.
  • the slide 20 is mounted eccentrically on a shaft of a first pulley 22.
  • the latter is connected by a connecting rod 24 to a second pulley 26, the connecting rod 24 and the pulley 26 being mounted eccentrically one relative to the other.
  • the two pulleys 22 and 26 are rotated by a toothed belt 28 passing over a third pulley 30.
  • the latter is driven by a motor 32.
  • a reduction is achieved between the output shaft of the motor 32 and the third pulley 30.
  • the carrying structure 10 is pivotally mounted about an axis 34 on a support 36.
  • the latter is movable in translation in the preferred embodiment shown in the drawing and moves parallel to the branches 12,14 of the structure carrier.
  • the pivoting of the supporting structure 10 takes place when the support 36 is at the end of its travel on the side of the base 16 (FIG. 4).
  • a fixed stop 38 and a pin 40 integral with the support structure 10 are provided.
  • the pin 40 comes against the stop 38.
  • the latter is provided with a notch 42 in which the pin 40 is housed.
  • the bottom of this notch 42 communicates with a slot 44 serving as a guide for the pin 40 when the carrying structure 10 pivots about its axis 34.
  • the slot 44 is such that the pin comes into abutment at the bottom of the slot when the supporting structure 10 has rotated 90 °.
  • the pivoting to go from Figure 1 to Figure 4 takes place in the counterclockwise direction, so that the punch holder 4 and the die 8 are found in the upper position.
  • the support 36 is provided with guide pads 46 and is guided on rails 48. These rails are substantially parallel to the branches 12, 14 of the punching tool.
  • the support 36 is driven on the rails by by means of a toothed belt 50, a splined drive shaft 52 and a driven pulley 54.
  • the toothed belt 50 is a linear belt, the two ends of which are fixed to a profile 56 integral with the movable support 36 and passing over the control shaft 52 and the driven pulley 54.
  • the control shaft 52 is driven by a motor, not shown, making it possible to know exactly the angular position of the control shaft 52 and therefore of the support 36 and of the punch 6
  • the displacement of the support 36 not only makes it possible to pass the punching tool from a working position (FIG. 1) to a maintenance position (FIG. 4), but it also makes it possible to perform punching at different distances from the edge of a sheet, without moving it.
  • the mobility of the punching tool is facilitated by the relatively small mass of the tool.
  • the structure and design of this tool make it light while being rigid to withstand the stresses exerted during punching.
  • the tubular structure and the possibility of pivoting allow, with respect to a punching tool of the prior art as described in the preamble to the present patent application, on the one hand to have a lighter support structure and on the other part to remove the element connecting the matrix to the punch holder.
  • the forces exerted are collected by the side plates of the support structure.
  • the tubular structure of the tool according to the invention makes it possible, from a resistance point of view, of the materials to stiffen the support structure without increasing its mass.
  • the pivoting design of the support structure allows access to the punch holder and the die and to change these when one wishes to make punches with other punches. It goes without saying that the invention is not limited to the embodiments of a punching tool described above by way of nonlimiting examples; on the contrary, it embraces all its variants.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)

Abstract

This punching tool comprises a punch head (2), at least one punch (6) mounted in a punch holder (4), a die (8) and a structure (10) bearing these elements having a global U shape, also called swan-neck. The punch head (2) and the punch holder (4) are located at the free end of one U branch (12), facing the die (8) located at the free end of the other U branch (14). The bearing structure (10) is a tubular structure, mounted pivoting, about an axis (34) substantially perpendicular to the U branches, on a support (36).

Description

OUTIL DE POINÇONNAGE, DESTINE NOTAMMENT AU POINÇONNAGE DE PUNCHING TOOL, ESPECIALLY FOR PUNCHING
TOLESSHEETS
La présente invention concerne un outil de poinçonnage, destiné notamment au poinçonnage de tôles. Les outils connus de ce type comportent une tête de frappe, un poinçon et une matrice, le tout étant monté à l'intérieur d'une structure porteuse. La tôle à poinçonner est placée entre le poinçon et la matrice et la tête de frappe agit sur le poinçon pour poinçonner la tôle.The present invention relates to a punching tool, intended in particular for punching sheets. Known tools of this type include a striking head, a punch and a die, the whole being mounted inside a support structure. The sheet to be punched is placed between the punch and the die and the striking head acts on the punch to punch the sheet.
Les outils de poinçonnage présentent une forme de U renversé, couché à l'horizontale, appelée en col de cygne. La tôle à poinçonner prend place entre les deux branches du U, la matrice se trouve à l'extrémité d'une branche du U et le poinçon se trouve face à la matrice, à l'extrémité de l'autre branche du U.The punching tools have an inverted U shape, lying horizontally, called a swan neck. The sheet metal to be punched takes place between the two branches of the U, the matrix is at the end of a branch of the U and the punch is located opposite the matrix, at the end of the other branch of the U.
La structure porteuse de 1 ' outil comporte deux plaques latérales en forme de col de cygne, une plaque supérieure et une plaque inférieure . A l' intérieur de cette structure qui porte la tête de frappe, prennent place le poinçon et la matrice qui sont reliés l'un à l'autre par un élément en forme de col de cygne.The support structure of the tool comprises two side plates in the form of a swan neck, an upper plate and a lower plate. Inside this structure which carries the striking head, the punch and the matrix take place which are connected to each other by an element in the form of a swan neck.
Ces structures ont l'inconvénient d'être lourdes. Les plaques latérales doivent encaisser une charge importante à chaque poinçonnage. La forme de ces plaques latérales n ' est pas idéale pour supporter des charges importantes. De ce fait, elles présentent une épaisseur correspondante, pour que les déformations ne soient pas trop grandes. De plus, on retrouve un élément en forme de col de cygne à l'intérieur de la structure porteuse. Cet élément de par sa forme et son encombrement est lourd.These structures have the disadvantage of being heavy. The side plates must collect a large load with each punching. The shape of these side plates is not ideal for supporting heavy loads. Therefore, they have a corresponding thickness, so that the deformations are not too large. In addition, there is an element in the form of a swan neck inside the supporting structure. This element by its shape and size is heavy.
Le déplacement de ces outils de poinçonnage est difficile et lorsqu'il s'agit de réaliser plusieurs poinçonnages sur une seule tôle, c'est généralement la tôle qui se déplace et non l'outil. Le but de 1 ' invention est alors de fournir un outil de poinçonnage de structure plus légère mais tout aussi rigide, dans lequel le changement du poinçon et de la matrice peut s'effectuer sans difficulté. A cet effet, elle propose un outil de poinçonnage comprenant une tête de frappe, au moins un poinçon monté dans un porte-poinçon, une matrice ainsi qu'une structure porteuse de ces éléments présentant une forme générale de U, appelée aussi col de cygne, la tête de frappe et le porte-poinçon se trouvant à l'extrémité libre d'une branche du U, face à la matrice se trouvant à l'extrémité libre de l'autre branche du U. Selon l'invention, la structure porteuse est une structure tubulaire, montée pivotante, autour d'un axe sensiblement perpendiculaire aux branches du U, sur un support.The displacement of these punching tools is difficult and when it is a question of carrying out several punchings on a single sheet, it is generally the sheet which moves and not the tool. The object of the invention is then to provide a punching tool with a lighter but just as rigid structure, in which the change of the punch and of the die can be carried out without difficulty. To this end, it offers a punching tool comprising a striking head, at least one punch mounted in a punch holder, a matrix as well as a structure carrying these elements having a general shape of U, also called swan neck , the striking head and the punch holder located at the free end of a branch of the U, facing the matrix located at the free end of the other branch of the U. According to the invention, the structure carrier is a tubular structure, pivotally mounted, about an axis substantially perpendicular to the branches of the U, on a support.
Le fait que la structure porteuse soit tubulaire permet d'avoir une rigidité accrue par rapport aux outils de poinçonnage de l'art antérieur, tout en étant plus légère. Cependant, cette structure fermée ne permet plus d'accéder comme sur les outils de l'art antérieur au niveau de la matrice et du porte poinçon. L'invention prévoit donc de rendre la structure porteuse pivotante, de telle sorte qu'après pivotement il soit possible d'accéder à ces éléments . Avantageusement, la structure porteuse peut pivoter entre une position où les branches du U sont sensiblement horizontales et une position où elles sont sensiblement verticales, dans cette dernière position, la tête de frappe, le poinçon et la matrice se trouvant en haut de la structure porteuse. L'accès a ces divers éléments est alors aisé. Pour faciliter leur démontage et leur remplacement, le porte-poinçon et la matrice sont montés de manière amovible sur la structure porteuse.The fact that the supporting structure is tubular makes it possible to have increased rigidity compared to the punching tools of the prior art, while being lighter. However, this closed structure no longer allows access as on the tools of the prior art at the level of the die and the punch holder. The invention therefore provides for making the pivoting supporting structure, so that after pivoting it is possible to access these elements. Advantageously, the support structure can pivot between a position where the branches of the U are substantially horizontal and a position where they are substantially vertical, in the latter position, the striking head, the punch and the die being at the top of the support structure . Access to these various elements is then easy. To facilitate their disassembly and replacement, the punch holder and the die are removably mounted on the supporting structure.
Dans une forme de réalisation préférentielle, la structure porteuse présente deux branches tubulaires de section sensiblement rectangulaire reliées entre elles par une base tubulaire de section sensiblement rectangulaire.In a preferred embodiment, the support structure has two tubular branches of substantially rectangular section connected together by a tubular base of substantially rectangular section.
Pour une plus grande flexibilité d'emploi de l'outil selon l'invention, le support sur lequel est montée la structure porteuse est avantageusement mobile en translation. Dans une forme de réalisation, le support est muni de patins destinés à glisser sur des rails de guidage. Pour l'entraînement en translation, l'invention propose que le support soit fixé à une courroie crantée passant sur un arbre de commande cannelé et une poulie menée.For greater flexibility in using the tool according to the invention, the support on which the supporting structure is mounted is advantageously movable in translation. In one embodiment, the support is provided with pads intended to slide on guide rails. For the drive in translation, the invention proposes that the support is fixed to a toothed belt passing over a grooved control shaft and a driven pulley.
Lorsque le support se déplace, il se déplace de préférence sensiblement parallèlement à l'axe des branches du U de la structure porteuse, de plus une butée est prévue du côté de la base du U, en outre la structure porteuse présente de chaque côté un tenon, et la butée comporte une découpe, destinée à recevoir le tenon lorsque la structure porteuse est contre la butée et à guider la structure porteuse lors de son pivotement. De toute façon, l'invention sera bien comprise à l'aide de la description qui suit, en référence au dessin schématique annexé, représentant à titre d'exemple non limitatif un outil de poinçonnage selon l'invention.When the support moves, it preferably moves substantially parallel to the axis of the branches of the U of the support structure, moreover a stop is provided on the side of the base of the U, in addition the support structure has on each side a post, and the stop includes a cutout, intended to receive the post when the support structure is against the stop and to guide the support structure during its pivoting. In any case, the invention will be clearly understood with the aid of the description which follows, with reference to the appended schematic drawing, representing by way of nonlimiting example a punching tool according to the invention.
Figure 1 en est une vue en coupe longitudinale, selon la ligne de coupe I-I de la figure 2,FIG. 1 is a view in longitudinal section thereof, along the section line I-I of FIG. 2,
Figure 2 est une vue en coupe selon la ligne de coupe II-II de la figure 1,FIG. 2 is a sectional view along the section line II-II of FIG. 1,
Figure 3 est une vue en coupe selon la ligne de coupe III-III de la figure 2, et Figure 4 est une vue de côté, montrant l'outil de poinçonnage de la figure 1 en position basculée.Figure 3 is a sectional view along the section line III-III of Figure 2, and Figure 4 is a side view showing the punching tool of Figure 1 in the tilted position.
L'outil de poinçonnage représenté aux figures 1 à 4 comporte une tête de frappe 2 , un porte poinçon 4 muni d ' un poinçon 6 et une matrice 8. Tous ces éléments sont montés dans une structure porteuse 10. La structure porteuse 10 présente une forme de U renversé, dont les branches sont sensiblement horizontales. L'espace libre entre les branches du u est destiné au passage d'une tôle devant être poinçonnée. De ce fait, l'écart entre les branches est réduit. Cette forme est couramment dite "de col de cygne" .The punching tool shown in FIGS. 1 to 4 comprises a striking head 2, a punch holder 4 provided with a punch 6 and a die 8. All of these elements are mounted in a support structure 10. The supporting structure 10 has an inverted U shape, the branches of which are substantially horizontal. The free space between the branches of the u is intended for the passage of a sheet to be punched. As a result, the gap between the branches is reduced. This form is commonly called "swan neck".
La structure porteuse 10 comporte une branche supérieure 12 et une branche inférieure 14 sensiblement horizontales, ainsi qu'une base 16 sensiblement verticale reliant les deux branches 12,14 horizontales. Comme le montrent les figures 1 et 2, la structure porteuse 10 est tubulaire. Chaque branche et la base sont de sections sensiblement rectangulaires. Une paroi de renfort 18 est prévue pour séparer chaque branche 12,14 de la base 16. La branche supérieure 12 de la structure porteuse porte à son extrémité libre la tête de frappe 2 et le porte poinçon 4, tandis que l'autre branche 14 porte à son extrémité libre, face au porte poinçon 4, la matrice 8. Tous ces éléments sont montés de manière amovible sur la structure porteuse 10.The supporting structure 10 comprises an upper branch 12 and a lower branch 14 which are substantially horizontal, as well as a substantially vertical base 16 connecting the two horizontal branches 12, 14. As shown in Figures 1 and 2, the supporting structure 10 is tubular. Each branch and the base are of substantially rectangular sections. A reinforcing wall 18 is provided to separate each branch 12, 14 from the base 16. The upper branch 12 of the support structure carries at its free end the striking head 2 and the punch holder 4, while the other branch 14 door at its free end, facing the punch holder 4, the matrix 8. All of these elements are removably mounted on the support structure 10.
La tête de frappe 2 fonctionne avec un moteur électrique. Bien entendu, une tête de frappe classique utilisant un vérin hydraulique peut être utilisée. La tête de frappe 2 comporte un coulisseau 20 qui agit sur le poinçon 6 pour poinçonner la tôle. Le coulisseau 20 est monté excentriquement sur un arbre d'une première poulie 22. Cette dernière est reliée par une bielle 24 à une seconde poulie 26, la bielle 24 et la poulie 26 étant montées de façon excentrée l'une par rapport à l'autre. Les deux poulies 22 et 26 sont entraînées en rotation par une courroie crantée 28 passant sur une troisième poulie 30. Cette dernière est entraînée par un moteur 32. Une démultiplication est réalisée entre l'arbre de sortie du moteur 32 et la troisième poulie 30. Cette solution permet d'obtenir le déplacement nécessaire et d'exercer en fin de course une force suffisante pour réaliser un bon poinçonnage tout en utilisant un moteur électrique qui est non polluant et facile à réguler.The striking head 2 operates with an electric motor. Of course, a conventional impact head using a hydraulic cylinder can be used. The striking head 2 has a slide 20 which acts on the punch 6 to punch the sheet. The slide 20 is mounted eccentrically on a shaft of a first pulley 22. The latter is connected by a connecting rod 24 to a second pulley 26, the connecting rod 24 and the pulley 26 being mounted eccentrically one relative to the other. The two pulleys 22 and 26 are rotated by a toothed belt 28 passing over a third pulley 30. The latter is driven by a motor 32. A reduction is achieved between the output shaft of the motor 32 and the third pulley 30. This solution makes it possible to obtain the necessary displacement and to exert a force at the end of the race. sufficient to achieve good punching while using an electric motor which is non-polluting and easy to regulate.
Afin de pouvoir accéder au porte poinçon 4 et à la matrice 8 et changer ces éléments, il est prévu de pouvoir faire pivoter l'outil de poinçonnage. A cet effet, la structure porteuse 10 est montée pivotante autour d'un axe 34 sur un support 36. Ce dernier est mobile en translation dans la forme d'exécution préférentielle représentée au dessin et se déplace parallèlement aux branches 12,14 de la structure porteuse.In order to be able to access the punch holder 4 and the die 8 and change these elements, provision is made to be able to rotate the punching tool. To this end, the carrying structure 10 is pivotally mounted about an axis 34 on a support 36. The latter is movable in translation in the preferred embodiment shown in the drawing and moves parallel to the branches 12,14 of the structure carrier.
Le pivotement de la structure porteuse 10 s'effectue lorsque le support 36 est en fin de course du côté de la base 16 (figure 4). Une butée fixe 38 ainsi qu'un tenon 40 solidaire de la structure porteuse 10 sont prévus. Lors du déplacement en translation du support 36, en fin de course du côté de la base 16 (à gauche sur les figures 1,2 et 4), le tenon 40 vient contre la butée 38. Cette dernière est munie d'une encoche 42 dans laquelle vient loger le tenon 40. Le fond de cette encoche 42 communique avec une fente 44 servant de guide au tenon 40 lorsque la structure porteuse 10 pivote autour de son axe 34. La fente 44 est telle que le tenon vient en butée au fond de la fente lorsque la structure porteuse 10 a pivoté de 90°. Le pivotement pour passer de la figure 1 à la figure 4 a lieu dans le sens trigonométrique, de telle sorte que le porte poinçon 4 et la matrice 8 se retrouvent en position supérieure.The pivoting of the supporting structure 10 takes place when the support 36 is at the end of its travel on the side of the base 16 (FIG. 4). A fixed stop 38 and a pin 40 integral with the support structure 10 are provided. During the translational movement of the support 36, at the end of the travel on the side of the base 16 (on the left in FIGS. 1, 2 and 4), the pin 40 comes against the stop 38. The latter is provided with a notch 42 in which the pin 40 is housed. The bottom of this notch 42 communicates with a slot 44 serving as a guide for the pin 40 when the carrying structure 10 pivots about its axis 34. The slot 44 is such that the pin comes into abutment at the bottom of the slot when the supporting structure 10 has rotated 90 °. The pivoting to go from Figure 1 to Figure 4 takes place in the counterclockwise direction, so that the punch holder 4 and the die 8 are found in the upper position.
Dans cette dernière position, il est facile d'accéder au porte poinçon 4 et à la matrice pour les changer par d'autres pièces semblables mais permettant de réaliser des poinçonnages différents.In this last position, it is easy to access the punch holder 4 and the die to change them by other similar parts but allowing different punches to be made.
Le support 36 est muni de patins de guidage 46 et est guidé sur des rails 48. Ces rails sont sensiblement parallèle aux branches 12,14 de l'outil de poinçonnage. L'entraînement du support 36 sur les rails s'effectue par l'intermédiaire d'une courroie crantée 50, d'un arbre de commande 52 cannelé et d'une poulie menée 54. La courroie crantée 50 est une courroie linéaire dont les deux extrémités sont fixées à un profilé 56 solidaire du support mobile 36 et passant sur l'arbre de commande 52 et la poulie menée 54. L'arbre de commande 52 est entraîné par un moteur non représenté permettant de connaître exactement la position angulaire de l'arbre de commande 52 et donc du support 36 et du poinçon 6. Le déplacement du support 36 ne permet pas seulement de faire passer l'outil de poinçonnage d'une position de travail (figure 1) vers une position de maintenance (figure 4), mais il permet aussi de réaliser des poinçonnages à différentes distances du bord d'une tôle, sans bouger celle-ci.The support 36 is provided with guide pads 46 and is guided on rails 48. These rails are substantially parallel to the branches 12, 14 of the punching tool. The support 36 is driven on the rails by by means of a toothed belt 50, a splined drive shaft 52 and a driven pulley 54. The toothed belt 50 is a linear belt, the two ends of which are fixed to a profile 56 integral with the movable support 36 and passing over the control shaft 52 and the driven pulley 54. The control shaft 52 is driven by a motor, not shown, making it possible to know exactly the angular position of the control shaft 52 and therefore of the support 36 and of the punch 6 The displacement of the support 36 not only makes it possible to pass the punching tool from a working position (FIG. 1) to a maintenance position (FIG. 4), but it also makes it possible to perform punching at different distances from the edge of a sheet, without moving it.
La mobilité de 1 ' outil de poinçonnage est facilitée par la masse relativement faible de l'outil. La structure et la conception de cet outil font qu'il est léger tout en étant rigide pour encaisser les contraintes exercées lors d'un poinçonnage. La structure tubulaire et la possibilité de pivotement permettent, par rapport à un outil de poinçonnage de l'art antérieur tel que décrit au préambule de la présente demande de brevet, d'une part d'avoir une structure porteuse plus légère et d'autre part de supprimer l'élément reliant la matrice au porte poinçon. Dans les outils de poinçonnage de l'art antérieur, les efforts exercés sont encaissés par les plaques latérales de la structure porteuse. La structure tubulaire de l'outil selon l'invention permet d'un point de vue résistance des matériaux de rigidifier la structure porteuse sans augmenter la masse de celle-ci. La conception pivotante de la structure porteuse permet quant à elle de pouvoir accéder au porte poinçon et à la matrice et de changer ceux-ci lorsque l'on souhaite réaliser des poinçonnages avec d'autres poinçons. Comme il va de soi, l'invention ne se limite pas aux formes de réalisation d'un outil de poinçonnage décrites ci-dessus à titre d'exemples non limitatifs ; elle en embrasse au contraire toutes les variantes. The mobility of the punching tool is facilitated by the relatively small mass of the tool. The structure and design of this tool make it light while being rigid to withstand the stresses exerted during punching. The tubular structure and the possibility of pivoting allow, with respect to a punching tool of the prior art as described in the preamble to the present patent application, on the one hand to have a lighter support structure and on the other part to remove the element connecting the matrix to the punch holder. In the punching tools of the prior art, the forces exerted are collected by the side plates of the support structure. The tubular structure of the tool according to the invention makes it possible, from a resistance point of view, of the materials to stiffen the support structure without increasing its mass. The pivoting design of the support structure allows access to the punch holder and the die and to change these when one wishes to make punches with other punches. It goes without saying that the invention is not limited to the embodiments of a punching tool described above by way of nonlimiting examples; on the contrary, it embraces all its variants.

Claims

REVENDICATIONS
1 - Outil de poinçonnage comprenant une tête de frappe (2 ) , au moins un poinçon ( 6 ) monté dans un porte- poinçon (4), une matrice (8) ainsi qu'une structure porteuse (10) de ces éléments présentant une forme générale de U, appelée aussi col de cygne, la tête de frappe ( 2 ) et le porte-poinçon ( 4 ) se trouvant à l'extrémité libre d'une branche du U, face à la matrice ( 8 ) se trouvant à 1 ' extrémité libre de 1 ' autre branche du U, caractérisé en ce que la structure porteuse (10) est une structure tubulaire, montée pivotante, autour d'un axe (34) sensiblement perpendiculaire aux branches (12,14) du U, sur un support (36).1 - Punching tool comprising a striking head (2), at least one punch (6) mounted in a punch holder (4), a die (8) as well as a support structure (10) of these elements having a general shape of U, also called swan neck, the striking head (2) and the punch holder (4) being at the free end of a branch of the U, facing the matrix (8) being The free end of the other branch of the U, characterized in that the supporting structure (10) is a tubular structure, pivotally mounted, around an axis (34) substantially perpendicular to the branches (12,14) of the U, on a support (36).
2 - Outil de poinçonnage selon la revendication 1, caractérisé en ce que la structure porteuse (10) peut pivoter entre une position où les branches du U (12,14) sont sensiblement horizontales et une position où elles sont sensiblement verticales, dans cette dernière position, la tête de frappe (2), le poinçon (6) et la matrice (8) se trouvant en haut de la structure porteuse (10).2 - Punching tool according to claim 1, characterized in that the support structure (10) can pivot between a position where the branches of the U (12,14) are substantially horizontal and a position where they are substantially vertical, in the latter position, the striking head (2), the punch (6) and the die (8) being at the top of the supporting structure (10).
3 - Outil de poinçonnage selon la revendication 1 ou 2, caractérisé en ce que le porte-poinçon (4) et la matrice (8) sont montés de manière amovible sur la structure porteuse (10).3 - Punching tool according to claim 1 or 2, characterized in that the punch holder (4) and the die (8) are removably mounted on the support structure (10).
4 - Outil de poinçonnage selon 1 ' une des revendications 1 à 3, caractérisé en ce que la structure porteuse (10) présente deux branches tubulaires (12,14) de section sensiblement rectangulaire reliées entre elles par une base tubulaire (16) de section sensiblement rectangulaire .4 - Punching tool according to one of claims 1 to 3, characterized in that the support structure (10) has two tubular branches (12,14) of substantially rectangular section connected together by a tubular base (16) of section substantially rectangular.
5 - Outil de poinçonnage selon l'une des revendications 1 à 4, caractérisé en ce que le support (36) sur lequel est montée la structure porteuse (10) est mobile en translation. 6 - Outil de poinçonnage selon la revendication 5, caractérisé en ce que le support (36) est muni de patins (46) destinés à glisser sur des rails de guidage (48).5 - Punching tool according to one of claims 1 to 4, characterized in that the support (36) on which is mounted the support structure (10) is movable in translation. 6 - Punching tool according to claim 5, characterized in that the support (36) is provided with pads (46) intended to slide on guide rails (48).
7 - Outil de poinçonnage selon la revendication 5 ou 6, caractérisé en ce que le support (36) est fixé à une courroie crantée (50) passant sur un arbre de commande cannelé (52) et une poulie menée (54).7 - Punching tool according to claim 5 or 6, characterized in that the support (36) is fixed to a toothed belt (50) passing over a grooved control shaft (52) and a driven pulley (54).
8 - Outil de poinçonnage selon l'une des revendications 5 à 7 , caractérisé en ce que le support (36) se déplace sensiblement parallèlement à l'axe des branches du U de la structure porteuse, en ce qu'une butée (38) est prévue du côté de la base (16) du U, en ce que la structure porteuse (10) présente de chaque côté un tenon (40), et en ce que la butée (36) comporte une découpe (42), destinée à recevoir le tenon (40) lorsque la structure porteuse (10) est contre la butée (36) et à guider la structure porteuse (10) lors de son pivotement. 8 - Punching tool according to one of claims 5 to 7, characterized in that the support (36) moves substantially parallel to the axis of the branches of the U of the support structure, in that a stop (38) is provided on the side of the base (16) of the U, in that the carrying structure (10) has on each side a stud (40), and in that the stop (36) comprises a cutout (42), intended to receiving the post (40) when the support structure (10) is against the stop (36) and guiding the support structure (10) during its pivoting.
PCT/FR1997/001228 1996-07-05 1997-07-07 Punching tool, in particular for punching sheet metal WO1998001288A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP97932852A EP0912326A1 (en) 1996-07-05 1997-07-07 Punching tool, in particular for punching sheet metal

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9608640A FR2750627B1 (en) 1996-07-05 1996-07-05 PUNCHING TOOL, ESPECIALLY FOR PUNCHING SHEETS
FR96/08640 1996-07-05

Publications (1)

Publication Number Publication Date
WO1998001288A1 true WO1998001288A1 (en) 1998-01-15

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Application Number Title Priority Date Filing Date
PCT/FR1997/001228 WO1998001288A1 (en) 1996-07-05 1997-07-07 Punching tool, in particular for punching sheet metal

Country Status (3)

Country Link
EP (1) EP0912326A1 (en)
FR (1) FR2750627B1 (en)
WO (1) WO1998001288A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2806945B1 (en) * 2000-04-04 2002-09-27 Jean Claude Jeandeaud PUNCHING CENTER, ESPECIALLY FOR PUNCHING SHEETS

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1920749A1 (en) * 1968-04-29 1969-11-13 Smalandsstenars Mek Verkst Ab Press frame
US4375775A (en) * 1981-03-26 1983-03-08 Franz Louis J Stamping press die support mounting
WO1990006843A1 (en) * 1988-12-22 1990-06-28 Hova Svets Ab Improvements in and relating to open-sided presses

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1920749A1 (en) * 1968-04-29 1969-11-13 Smalandsstenars Mek Verkst Ab Press frame
US4375775A (en) * 1981-03-26 1983-03-08 Franz Louis J Stamping press die support mounting
WO1990006843A1 (en) * 1988-12-22 1990-06-28 Hova Svets Ab Improvements in and relating to open-sided presses

Also Published As

Publication number Publication date
FR2750627B1 (en) 1999-01-29
FR2750627A1 (en) 1998-01-09
EP0912326A1 (en) 1999-05-06

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