EP2543450B1 - Machine et procédé à decouper de parties de toles - Google Patents

Machine et procédé à decouper de parties de toles Download PDF

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Publication number
EP2543450B1
EP2543450B1 EP11382231.6A EP11382231A EP2543450B1 EP 2543450 B1 EP2543450 B1 EP 2543450B1 EP 11382231 A EP11382231 A EP 11382231A EP 2543450 B1 EP2543450 B1 EP 2543450B1
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EP
European Patent Office
Prior art keywords
die
cutting
transfer
successive
parts
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.)
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Application number
EP11382231.6A
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German (de)
English (en)
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EP2543450A1 (fr
Inventor
José Carlos Martinez Castro
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.)
CIE Automotive SA
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CIE Automotive SA
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Publication date
Application filed by CIE Automotive SA filed Critical CIE Automotive SA
Priority to PT11382231T priority Critical patent/PT2543450E/pt
Priority to EP11382231.6A priority patent/EP2543450B1/fr
Priority to ES11382231.6T priority patent/ES2533390T3/es
Publication of EP2543450A1 publication Critical patent/EP2543450A1/fr
Application granted granted Critical
Publication of EP2543450B1 publication Critical patent/EP2543450B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/24—Perforating, i.e. punching holes
    • B21D28/26—Perforating, i.e. punching holes in sheets or flat parts
    • 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
    • B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
    • B21D28/06—Making more than one part out of the same blank; Scrapless working
    • 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
    • B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
    • B21D28/10—Incompletely punching in such a manner that the parts are still coherent with the work
    • 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
    • B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
    • B21D43/02—Advancing work in relation to the stroke of the die or tool
    • B21D43/04—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work
    • B21D43/05—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work specially adapted for multi-stage presses
    • B21D43/055—Devices comprising a pair of longitudinally and laterally movable parallel transfer bars

Definitions

  • the present invention is comprised in the technical field of stamping machines for stamping by means of dies.
  • the sheet metal to be die-cut is cut into portions or formats of the size necessary for the part to be obtained. These formats are passed through a series of dies (deep drawing machines, die-cutting machines etc.) which give press strokes to the formats as they pass through each die or station. Between one die and the next, the format or part with the operations performed in the previous station passes to the next station by means of a device which grips the part (generally by means of clamps) and passes it to the next station or die.
  • the gripping device is generally formed by longitudinal stringers arranged along the entire machine which have an advance and retreat (back and forth) movement for collecting the part and passing it to the next station, and a transverse movement for being introduced inside the dies and gripping the parts.
  • the formats thus advance by means of the clamp conveying system from one station to another and are becoming shaped.
  • the excess sheet metal falls to a series of generally lower discharge lines.
  • the operation of the dies and of the transfer conveying system is synchronized.
  • the sheet metal to be die-cut comes from a coil and moves along all the dies or stations continuously, i.e., without pieces or formats corresponding to each part being previously cut.
  • the advance of the sheet metal is performed by means of driving rollers arranged at the inlet of the machine.
  • the sheet metal must furthermore have two planar longitudinal strips robust enough to allow the dragging of the sheet metal.
  • the parts are shaped when they pass through the successive dies or stations but they remain attached to the common sheet metal until the end.
  • the complete separation of the sheet metal and the machine only occurs at the end of the machine.
  • the advance movement is not continuous in the sense that the sheet metal is moving with a constant speed, but rather it occurs in a discontinuous manner simultaneously to the movement of the dies.
  • Progressive processes are generally suitable for parts with complicated geometries which are distributed in the sheet metal according to a special mapping which allows optimizing the surface of the sheet metal and therefore they do not allow cuts transverse to the sheet metal for establishing unitary formats for each part, since a highly considerable surface of the sheet metal would thus be wasted. Furthermore, if the parts have complex shapes, transfer devices may be little suitable since gripping by means of clamps provided at a side structure which advances longitudinally but which must furthermore enter inside the dies to pick up the part is very complicated, since it can entail a very complex clamp distribution. On the other hand, progressive processes are not very suitable when the parts have bent edges perpendicular to the surface of the sheet metal, since they require much space between parts.
  • the object of the present invention is to overcome the drawbacks of prior art detailed above, by means of a machine and method for stamping metal parts.
  • the machine for stamping metal parts has a plurality of successive die-cutting stations synchronized to shape metal parts from sheet metal coming from a coil of sheet metal supplied to the stamping machine through an inlet provided with inlet rollers for pushing the sheet metal to a first die-cutting station for progressively obtaining successive individualized sheets die-cut according to a predetermined pattern from the sheet metal, and comprises a second die-cutting station for receiving and die-cutting the individualized sheets, comprising a plurality of transfer dies arranged one after the other for shaping successive metal parts from the successive individualized sheets delivered by the first die-cutting station, the plurality of transfer dies comprising an initial transfer die for performing an initial die-cutting of each of the individualized sheets and obtaining successive initial parts, and a final transfer die for performing a final die-cutting in each of the previously die-cut parts to obtain the metal parts; an outlet station arranged at the outlet of the transfer die-cutting station through which the metal parts shaped in the second die-cutting station are extracted;
  • the first die-cutting station operates similarly to a progressive die-cutting station, although its action does not result in individualized three-dimensional formats but rather in individualized sheets die-cut according to a predetermined pattern.
  • the second die-cutting station operates like a transfer station, but it does not start from individualized three-dimensional formats or from the same sheet metal, but rather from the individualized sheets which it receives directly from the first die-cutting station.
  • the side bars are preferably connected to a transverse movement mechanism for moving the side bars transversely between a distanced position in which the gripping clamps are distanced from said end portions, and a collecting position in which the clamps can grip said end portions.
  • the longitudinal advance and retreat mechanism can be designed to move the side bars at a pace of movement such that, in the second die-cutting station, in the die-cutting positions, the die-cut parts are more distanced from one another than the distance at which the individualized sheet of the sheet metal from which it has been separated in the first die-cutting station is located.
  • the second die-cutting station comprises at least one deep drawing transfer die for conferring a predetermined three-dimensional structure to each of the successive die-cut parts and at least one punching transfer die for performing punches in the successive die-cut parts.
  • the deep drawing transfer die can be the initial transfer die, whereas the final transfer die can be a punching die.
  • the machine can furthermore be provided with a transverse punching device arranged such that it is capable of punching edges bent by the deep drawing transfer die outside the horizontal plane of each of the successive die-cut parts.
  • the transverse punching device can be arranged between a deep drawing transfer die and the outlet station, and can comprise at least one punching carriage movable along the bent edges of the die-cut part to punching positions in said edges.
  • the outlet station can comprise an ejecting mechanism for ejecting the metal parts from the second die-cutting station, the ejecting mechanism comprising a holding mechanism comprising respective holding clamps arranged at the ends of the side bars such that they can grip the metal part obtained in the second die-cutting station and extract at least a front portion of the metal part by means of at least one advance movement of the side bars.
  • the ejecting mechanism can be designed to eject the front portion of the metal part in a first advance movement of the side bars and to eject the whole metal part in a second advance movement of the side bars.
  • the outlet station can comprise a conveyor belt for collecting the extracted metal parts.
  • the first station is preferably provided with passage and presence detectors
  • the second die-cutting station is provided with an electronic control independent from the upward and downward movements of the press which allows accelerating, decelerating and even stopping the advance of the parts in their path towards the outlet station
  • the method for stamping metal parts by using a plurality of successive die-cutting stations synchronized to shape metal parts from sheet metal coming from a coil of sheet metal supplied to the stamping machine through an inlet provided with inlet rollers for pushing the sheet metal to a first die-cutting station for progressively obtaining successive individualized sheets die-cut according to a predetermined pattern from the sheet metal comprises transferring the individualized sheets from the progressive die-cutting station directly to a second die-cutting station arranged after the first die-cutting station; performing, in the second die-cutting station, by means of a plurality of transfer dies arranged one after the other, a transfer die-cutting for shaping successive metal parts from the successive individualized sheets delivered by the first die-cutting station, the transfer die-cutting comprising initial die-cutting in an initial transfer die for performing an initial die-cutting of each of the individualized sheets and obtaining successive initial parts, and a final transfer die-cutting in a final transfer die for performing a final die-cutting in each of the previously die
  • the method preferably comprises conferring a predetermined three-dimensional structure to the individualized sheets by making them pass through at least one deep drawing transfer die, and performing punches in the successive die-cut parts by means of at least one punching transfer die.
  • the method according to the invention can also preferably comprise a step of performing a punching of the edges bent by the deep drawing transfer die outside the horizontal plane of each of the successive die-cut parts by means of at least one transverse punching device arranged between a deep drawing transfer die and a punching transfer die.
  • the present invention allows, compared to conventional stamping systems, reducing the work cycle time in the manufacture of metal parts, the elimination of the need to have intermediate stocks, and a substantial energy saving.
  • a part with dimensions of 3000x600x60 in conventional presses is stamped with a rate of 5 strokes per minute, whereas the present invention allows performing 8 strokes per minute.
  • the elimination of the intermediate stocks means that it is not necessary to convey the parts between processes, which in turn allows eliminating manual interaction and defects in parts due to handling.
  • the energy saving can amount, for example, to -57% for the press for manufacturing parts of dimensions of 3000x600x60, due to the fact that, with the conventional process, 3 presses of 1000 T are required to produce such parts, whereas such parts can be manufactured with a single press, and with a consumption of 1300 T.
  • the elimination of the need to convey the parts between processes also contributes to the energy saving, all of which in turn allows eliminating the possibility of manual interaction and defects in parts due to handling.
  • the stamping machine for metal parts comprises two successive die-cutting stations -4, 5, 10- which are synchronized to shape metal parts -3- from sheet metal -1- drawn from a coil of sheet metal (not shown in the figures) and fed to the inlet -14- of the machine through inlet rollers -11-pushing the sheet metal -1- into the first die-cutting station -4-.
  • the sheet metal -1- is successively die-cut according to predetermined patterns to first obtain the sheet metal provided with a first die-cutting -1a-, then the sheet metal provided with a second die-cutting -1 b- and finally individualized sheets -1c-, each of which is provided with a final predetermined pattern.
  • the sheet metal advances step by step through the first die-cutting station -4- making successive stops below the first punch -4a-, the second punch -4b- and the third punch -4c- assembled in the upper portion -13b- of the stamping machine, such that the downward movement of the punches -4a, 4b, 4c- causes the die-cutting of the sheet metal -1- and, finally, due to the action of the third punch, the individualized sheet -1 c-.
  • the second die-cutting station -5- comprises a deep drawing transfer die -5a-for conferring a predetermined three-dimensional structure to each of the successive individualized sheets -1c-, to obtain an initial die-cut part -2a- with edges bent outside its horizontal plane, and a punching transfer die -5b- for performing punches in the successive initial die-cut parts -2a- and obtaining successive final die-cut parts -2b-.
  • the stamping machine is furthermore provided with a transverse punching device -10- arranged between the punching transfer die -5b- and the outlet station -6-, and which comprises several punching carriages which are movable along the bent edges of the die-cut part -2b- to punching positions at said edges.
  • the stamping machine further comprises a longitudinal advance and retreat device for collecting the individualized sheets -1 c- from the first die-cutting station -4- and introducing them in the second die-cutting station -5-, and moving the die-cut parts-2a, 2b- towards an outlet station -6- making synchronized stops during the action of each of the transfer dies -5a, 5b- in respective die-cutting positions, in which the deep drawing male element -8a- and the deep drawing die -5a,- and the punching male element -8b- and the punching die -5b- act respectively.
  • the advance and retreat device comprises respective side bars -9a, 9b- longitudinally movable in a longitudinal back and forth motion provided with gripping mechanisms comprising gripping clamps -9c, 9d- for gripping respective end portions, facing the gripping clamps -9c, 9d-, of the individualized sheets and of the successive die-cut parts-2a, 2b- when they are moved by the advance of the side bars -9a, 9b- to the consecutive transfer dies -5a, 5b-.
  • the side bars -9a, 9b- are connected to a transverse movement mechanism for moving the side bars -9a, 9b- transversely between a distanced position in which the gripping clamps -9c, 9d- are distanced from said end portions and a collecting position in which the clamps can grip said end portions.
  • the longitudinal advance and retreat mechanism is designed to move the side bars -9a, 9b- at a pace of movement such that in the second die-cutting station -5-, in the die-cutting positions, the die-cut parts -2a, 2b- are more separated from one another than the separation at which the individualized sheet -1 c- of the sheet metal -1- from which it has been separated in the first die-cutting station -4- is located.
  • the outlet station -6- through which the metal parts -3- are extracted is arranged at the outlet -5c- of the second die-cutting station -5-, and comprises an ejecting mechanism which comprises a holding mechanism comprising respective holding clamps -6a, 6b- arranged at the ends of the side bars -9a, 9b- such that they are capable of gripping the metal part -3- obtained in the die-cutting station transfer -5- and first extract a front portion of the metal part -3- by means of a first advance movement of the side bars -9a, 9b-, and eject the whole metal part -3- in a second advance movement of the side bars -9a, 9b-.
  • the outlet station -6- further comprises a conveyor belt -7- onto which the extracted metal parts -3- fall and which conveys the metal parts -3- towards, for example, a packaging installation (not shown in the figures).
  • the first phase of the work cycle can be observed, in which the transversely opposite side portions of the individualized metal sheet -1 c- (drawn with a thick solid line) obtained after the first and second die-cutting -1a, 1 b- of the sheet metal -1-, face respective first pairs of clamps -9c, 9d- coupled to the respective side bars -9a, 9b-.
  • the transverse bars -9a, 9b- move transversely towards one another in the direction of the arrows shown in Figure 3 , they reach the position shown in Figure 4 in which the first pairs of gripping clamps -9c, 9d- grip the respective side portions of the individualized sheet -1c-.
  • the side bars -9a, 9b- advance longitudinally in the direction of the arrows shown in Figure 4 , they reach the position shown in Figure 5 , in which they have conveyed the individualized sheet -1c- to the deep drawing transfer die -5a-.
  • the pairs of gripping clamps -9c, 9d- open and the side bars -9a, 9b- move away from the individualized sheet -1c- in the direction of the arrows shown in Figure 5
  • the side bars reach the position shown in Figure 6 and, after the action of the deep drawing male element -8a- the initial die-cut part -2a- is shaped.
  • the side bars -9a, 9b-again retreat in the direction of the arrows shown in Figure 6 , and reach the position shown in Figure 7 , in which the side portions of the initial part face respective second pairs of clamps -9c, 9d-. From this position, the side bars again move transversely towards the initial die-cut part -2a- in the direction of the arrows shown in Figure 7 , reaching the position shown in Figure 8 in which the second pairs of clamps -9c, 9d- grip the side portions of the initial part -2a-.
  • the side bars -9a, 9b- then advance again in the direction of the arrows shown in Figure 8 , adopting the position shown in Figure 9 , in which the initial die-cut part -2a- is positioned in the punching transfer die -5b-, after which the second pairs of gripping clamps -9c, 9d- open and the side bars -9a, 9b again separate and retreat, reaching the position shown in Figure 10 .
  • the final die-cut part -2b- is shaped by action of the punching male element -8b-.
  • the side bars -9a, 9b- have retreated, the side portions of the final die-cut part -2b- face respective third pairs of gripping clamps -9c, 9d-.
  • the clamps -9c, 9d- of the third pair of clamps open and the side bars -9a, 9b- separate in the directions of the arrows shown in Figure 12 , such that they reach the position shown in Figure 13 , in which the front portion of the metal part -3-is secured by the holding parts -6b-.
  • the side bars -9a, 9b- then retreat again in the direction of the arrows shown in Figure 13 , until the position shown in Figure 14 , in which the holding clamps -6a- face one of the side portions of the metal part -3-whereas the other front portion -3a- thereof is still secured by the holding clamps -6b-.
  • the back and forth motion of the side bars -9a, 9b- allows forming at the same time, by means of a single die-cutting stroke simultaneously performed by the punches -4a, 4b, 4c- of the first die-cutting station -4- and the male elements 8a, 8b- of the second die-cutting station -5-, die-cutting the sheet metal -1-, separating an individualized part -1c-, shaping an initial die-cut part -2a-, a final die-cut part -2b- and a metal part -3- which, in the back and forth movement of the side bars -9a, 9b- and the action of the gripping clamps -9c, 9d-, are successively conveyed to the next die-cutting position, such that it is possible to continuously manufacture successive metal parts -3- from the sheet metal -1-, and eject the successively shaped metal parts -3- from the stamping machine

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Claims (15)

  1. Machine d'estampage pour pièces métalliques avec une pluralité de stations successives de découpage à l'emporte-pièce synchronisées pour former des pièces métalliques à partir d'un tôle provenant d'une bobine de tôle amenée à la machine d'estampage par une entrée prévue avec des rouleaux d'entrée pour pousser la tôle vers une première station de découpage à l'emporte-pièce afin d'obtenir progressivement des feuilles successives individuelles découpées à l'emporte-pièce selon un modèle prédéterminé à partir de la tôle, caractérisée en ce qu'elle comprend :
    une seconde station de découpage à l'emporte-pièce (5) pour recevoir et découper à l'emporte-pièce les feuilles individualisées et comprenant une pluralité de matrices de transfert (5a, 5b) agencées les unes après les autres pour former des pièces métalliques (3) successives avec une configuration tridimensionnelle à partir des feuilles (1c) individualisées successives délivrées par la première station de découpage à l'emporte-pièce (4), la pluralité de matrices de transfert comprenant une matrice de transfert initiale (5a) pour réaliser un découpage initial à l'emporte-pièce de chacune des feuilles (1c) individualisées et obtenir des pièces initiales (2a) successives, et une matrice de transfert finale (5b) pour réaliser un découpage final à l'emporte-pièce dans chacune des pièces précédemment découpées à l'emporte-pièce afin d'obtenir les pièces métalliques (3) ;
    une station de sortie (6) agencée au niveau de la sortie (5c) de la seconde station de découpage à l'emporte-pièce (5a) par laquelle les pièces métalliques (3) formées dans la seconde station de découpage à l'emporte-pièce (5) sont extraites ;
    un dispositif d'avancement et de recul longitudinal pour collecter les feuilles (1c) individualisées de la première station de découpage à l'emporte-pièce et les introduire dans la seconde station de découpage à l'emporte-pièce (5), et déplacer les pièces (2a, 2b) découpées à l'emporte-pièce vers la station de sortie (6) en faisant des arrêts synchronisés pendant l'action de chacune des matrices de transfert (5a, 5b) dans des positions de découpage à l'emporte-pièce respectives, et qui comprend des barres latérales (9a, 9b) respectives qui sont longitudinalement mobiles selon un mouvement longitudinal de va et vient, prévues avec des mécanismes de préhension comprenant des pinces de préhension (9c, 9d) pour saisir des parties d'extrémité respectives, faisant face aux pinces de préhension (9c, 9d), des feuilles individualisées et des pièces (2a, 2b) découpées à l'emporte-pièce successives lorsqu'elles sont déplacées par l'avancement des barres latérales (9a, 9b) vers les matrices de transfert (5a, 5b) consécutives
  2. Machine selon la revendication 1, caractérisée en ce que les barres latérales sont raccordées à un mécanisme à mouvement transversal pour déplacer les barres latérales (9a, 9b) transversalement entre une position à distance dans laquelle les pinces de préhension (9c, 9d) sont à distance desdites parties d'extrémités, et une position de collecte dans laquelle les pinces peuvent saisir lesdites parties d'extrémité.
  3. Machine selon la revendication 1 ou 2, caractérisée en ce que le mécanisme d'avancement et de recul longitudinal et conçu pour déplacer les barres latérales (9a, 9b) à une allure de mouvement de sorte que, dans la seconde station de découpage à l'emporte-pièce (5), dans les positions de découpage à l'emporte-pièce, les pièces (2a, 2b) découpées à l'emporte-pièce sont davantage séparées les unes des autres que la séparation à laquelle la feuille (1c) individualisée de la tôle (1) de laquelle elle a été séparée dans la première station de découpage à l'emporte-pièce (4) est située.
  4. Machine selon la revendication 1, 2 ou 3, caractérisée en ce que la seconde station de découpage à l'emporte-pièce (5) comprend au moins une matrice de transfert d'emboutissage profond (5a) pour conférer une structure tridimensionnelle prédéterminée à chacune des pièces (2a, 2b) découpées à l'emporte-pièce successives de la tôle individualisée, et au moins une matrice de transfert de poinçonnage (5b) pour réaliser des poinçons dans les pièces (2b) découpées à l'emporte-pièce successives.
  5. Machine selon la revendication 4, caractérisée en ce que la matrice de transfert d'emboutissage profond (5a) est la matrice de transfert initiale.
  6. Machine selon la revendication 4, caractérisée en ce que la matrice de transfert finale (5b) est une matrice de poinçonnage.
  7. Machine selon la revendication 4, caractérisée en ce qu'elle comprend au moins un dispositif de poinçonnage transversal (10) agencé de sorte qu'il peut poinçonner des bords pilés par la matrice de transfert d'emboutissage profond (5a) hors du plan horizontal de chacune des pièces (2b) découpées à l'emporte-pièce successives.
  8. Machine selon la revendication 7, caractérisée en ce que le dispositif de poinçonnage transversal (10) est agencé entre une matrice de transfert d'emboutissage profond (5a) et la station de sortie (6).
  9. Machine selon la revendication 7 ou 8, caractérisée en ce que le dispositif de poinçonnage transversal (10) comprend au moins un chariot de poinçonnage mobile le long des bords pliés de la pièce (2b) découpée à l'emporte-pièce jusqu'aux positions de poinçonnage au niveau desdits bords.
  10. Machine selon l'une quelconque des revendications précédentes, caractérisée en ce que la station de sortie (6) comprend un mécanisme d'éjection pour éjecter les pièces métalliques de la seconde station de découpage à l'emporte-pièce, le mécanisme d'éjection comprenant un mécanisme de maintien comprenant des pinces de maintien (6a, 6b) respectives agencées aux extrémités des barres latérales (9a, 9b) de sorte qu'elles peuvent saisir la pièce métallique (3) obtenue dans le transfert (5) de la station de découpage à l'emporte-pièce et extraire au moins une partie avant de la pièce métallique (3) au moyen d'au moins un mouvement d'avancement des barres latérales (9a, 9b).
  11. Machine selon la revendication 10, caractérisée en ce que le mécanisme d'éjection est conçu pour éjecter la partie avant de la pièce métallique (3) dans un premier mouvement d'avancement des barres latérales (9a, 9b) et pour éjecter toute la pièce métallique (3) dans un second mouvement d'avancement des barres latérales (9a, 9b).
  12. Machine selon la revendication 10 ou 11, caractérisée en ce que la station de sortie (6) comprend une courroie transporteuse (7) pour collecter les pièces métalliques (3) extraites.
  13. Procédé pour estamper des pièces métalliques en utilisant une pluralité de stations de découpage à l'emporte-pièce successives afin de former des pièces métalliques à partir d'une tôle provenant d'une bobine de tôle amenée à la machine d'estampage par une entrée prévue avec des rouleaux d'entrée pour pousser la tôle vers une première station de découpage à l'emporte-pièce afin d'obtenir progressivement des feuilles individualisées successives découpées à l'emporte-pièce selon un modèle prédéterminé à partir de la tôle, caractérisé en ce qu'il comprend les étapes consistant à :
    transférer les feuilles (1c) individualisées de ladite première station de découpage à l'emporte-pièce (4) directement vers une seconde station de découpage à l'emporte-pièce (5) ;
    réaliser, la seconde station de découpage à l'emporte-pièce, au moyen d'une pluralité de matrices de transfert agencées les unes après les autres, un découpage à l'emporte-pièce de transfert pour former des pièces métalliques (3) successives à partir de formats (1c) découpés à l'emporte-pièce individualisés successifs délivrés par la première station de découpage à l'emporte-pièce (4), le découpage à l'emporte-pièce de transfert comprenant un découpage à l'emporte-pièce initial dans une matrice de transfert initiale (5a) pour réaliser un découpage à l'emporte-pièce initial de chacune des feuilles (1c) individualisées et obtenir des pièces (2a) initiales successives, et un découpage à l'emporte-pièce de transfert final dans une matrice de transfert finale (5b) pour réaliser un découpage à l'emporte-pièce final dans chacune des pièces (2a, 2b) préalablement découpées à l'emporte-pièce pour obtenir les pièces métalliques (3) ;
    transporter les feuilles (1c) individualisées vers une station de sortie (6) en réalisant des arrêts synchronisés pendant l'action de chacune des matrices de transfert (5a, 5b) dans des positions de découpage à l'emporte-pièce respectives, au moyen d'un dispositif d'avancement et de recul longitudinal, comprenant des barres latérales (9a, 9b) respectives longitudinalement mobiles selon un mouvement longitudinal de va et vient prévu avec des mécanismes de préhension comprenant des pinces de préhension (9c, 9d) pour saisir des parties d'extrémité respectives faisant face aux pinces de préhension (9c, 9d) des feuilles (1c) individualisées successives et des pièces (2a, 2b) découpées à l'emporte-pièce successives obtenues à partir des feuilles (1c) individualisées lorsqu'elles sont déplacées par l'avancement des barres latérales (9a, 9b) vers les matrices de transfert (5a, 5b) consécutives ;
    extraire les pièces métalliques (3) formées dans la seconde station de découpage à l'emporte-pièce (5) par la sortie (5c) de la seconde station de découpage à l'emporte-pièce (5) au moyen de la station de sortie (6).
  14. Procédé selon la revendication 13, caractérisé en ce qu'il comprend l'étape consistant à conférer une structure tridimensionnelle prédéterminée aux feuilles (1c) individualisées successives en les faisant passer par au moins une matrice de transfert d'emboutissage profond (5a) et en réalisant des poinçons dans les pièces (2b) découpées à l'emporte-pièce successives au moyen d'au moins une matrice de transfert de poinçonnage (5b).
  15. Procédé selon la revendication 14, caractérisé en ce qu'il comprend l'étape consistant à poinçonner des bords pliés par la matrice de transfert d'emboutissage profond (5a) hors du plan horizontal de chacune des pièces (2b) découpées à l'emporte-pièce successives au moyen d'au moins un dispositif de poinçonnage transversal (10) agencé entre une matrice de transfert d'emboutissage profond (5a) et une matrice de transfert de poinçonnage (5b).
EP11382231.6A 2011-07-08 2011-07-08 Machine et procédé à decouper de parties de toles Active EP2543450B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
PT11382231T PT2543450E (pt) 2011-07-08 2011-07-08 Máquina e método para estampar partes de metal
EP11382231.6A EP2543450B1 (fr) 2011-07-08 2011-07-08 Machine et procédé à decouper de parties de toles
ES11382231.6T ES2533390T3 (es) 2011-07-08 2011-07-08 Maquina y procedimiento de estampación de piezas metálicas

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EP11382231.6A EP2543450B1 (fr) 2011-07-08 2011-07-08 Machine et procédé à decouper de parties de toles

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DE102014112244A1 (de) 2014-08-26 2016-03-03 Benteler Automobiltechnik Gmbh Verfahren und Presse zur Herstellung wenigstens abschnittsweise gehärteter Blechbauteile
CN110449482B (zh) * 2019-07-17 2021-09-28 汉尔姆建筑科技有限公司 一种薄钢板的冷弯成型流水线
JP7379207B2 (ja) * 2020-02-21 2023-11-14 興代 伊達 ワーク搬送装置
CN113634680B (zh) * 2021-06-11 2023-07-14 苏州铭峰精密机械有限公司 一种汽车天线支座成型方法

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US4285754A (en) * 1979-11-05 1981-08-25 Solid Photography Inc. Method and apparatus for producing planar elements in the construction of surfaces and bodies
ITMI20012329A1 (it) * 2001-11-07 2003-05-07 Emme S R L Di Di Metodo ed apparato per la tranciatura in successione da nastro metallico di un semilavorato o di uno sbozzato
EP1914022B1 (fr) * 2006-09-01 2009-04-08 Feintool Intellectual Property AG Méthode et dispositif de production de pièces tridimensionnelles par des opérations de formage et de découpage fin
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