EP0068008A1 - Hydraulic press comprising a fixed apron and a moving apron - Google Patents

Hydraulic press comprising a fixed apron and a moving apron

Info

Publication number
EP0068008A1
EP0068008A1 EP82900209A EP82900209A EP0068008A1 EP 0068008 A1 EP0068008 A1 EP 0068008A1 EP 82900209 A EP82900209 A EP 82900209A EP 82900209 A EP82900209 A EP 82900209A EP 0068008 A1 EP0068008 A1 EP 0068008A1
Authority
EP
European Patent Office
Prior art keywords
press according
hydraulic press
deformation
apron
pressure means
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.)
Withdrawn
Application number
EP82900209A
Other languages
German (de)
French (fr)
Inventor
Arthur Huber
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.)
Beyeler Machines SA
Original Assignee
Beyeler Machines SA
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 Beyeler Machines SA filed Critical Beyeler Machines SA
Publication of EP0068008A1 publication Critical patent/EP0068008A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B1/00—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen
    • B30B1/10—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by toggle mechanism
    • B30B1/16—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by toggle mechanism operated by fluid-pressure means
    • 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
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/02—Bending sheet metal along straight lines, e.g. to form simple curves on press brakes without making use of clamping means
    • B21D5/0272—Deflection compensating means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/007—Means for maintaining the press table, the press platen or the press ram against tilting or deflection

Definitions

  • Hydraulic press comprising a fixed deck and a movable deck
  • a press brake before arriving to work in reduced margins of tolerance, requires a long period of adaptation on the part of the operator, and its precision depends on the skill of the latter.
  • the idea is indeed to determine and compensate for this deformation during the folding cycle, by making precise measurements of the deflection obtained simultaneously under stress. These measurements are analyzed by a central unit during and / or immediately after the working phase, and the deformations are compensated simultaneously by a counter-deformation which is given, until the matrix and the tool are parallel.
  • the present invention relates to a hydraulic press, comprising a fixed deck and a movable deck, as defined by claim 1.
  • the invention also relates to an actuation method as defined in claim 15.
  • the advantages of a hydraulic press which operates according to the idea of the present invention are obvious.
  • the deformation of the fixed deck and / or the movable deck can be corrected very precisely, since the exact measurement of the deflection is known.
  • This correction is made automatically and instantly by the machine, following orders given by an analysis center, without resorting to the skill of the operator.
  • the correction can be carried out either during the - working phase, or during and after the working phase, or only after the working phase.
  • WIPO fig. 1 shows a front view 3/4 in perspective, of a hydraulic press with two cylinders, with compensation slot, in its working position without tool lage
  • fig. 2 shows a front 3/4 view of a hydraulic press with two cylinders, with two compensation slots, in its working position without tools
  • FIG. 3 shows a vertical section along AA of an alternative embodiment of the press shown in FIG. 1.
  • Fig. 1 shows a hydraulic press in which the pistons of the working cylinders 6 are in their force position, therefore with the movable bulkhead 5 in the working phase.
  • Measuring means 3 make it possible to measure the deflection due to these deformations. They transmit their information to a central analysis unit 7. This central unit analyzes the information obtained and commands the compensation cylinders 2, which are located inside a compensation slot 1, to provide a complementary thrust to the inside the fixed apron 4, in order to obtain a curvature of the surface of the die holder 8, curvature which will be exactly the same and parallel to the curvature of the surface of the punch holder 9. The operation continues throughout the working phase, providing a permanent total correction.
  • Fig. 2 shows a second embodiment of the invention. It relates to a hydraulic press in which two compensation slots 1 have been made, one in the fixed deck 4 and the other in the movable deck 5. The press is shown in its working phase, in which the working cylinders 6 have the pistons in their position under stress.
  • the die holder 8 tends to deform in its central part downwards relative to its ends, while the movable apron 5 and in particular the punch holder 9 tend to deform so that the part center of the tool is higher than the ends of said punch holder.
  • means 3 for measuring the deformation send to the central 'analysis 7 the data necessary to establish with what effort the pistons 2 of the upper and lower compensation slots 1 must intervene to cancel the deformation on the edges of the two decks.
  • the central analysis unit controls the pistons of the compensating cylinders 2 so as to fully compensate for the bending in the movable deck 5 and in the fixed deck 4.
  • the die holder 8 and the holder punch 9 are each reduced to a straight line, exactly parallel to each other.
  • the compensating cylinders 2 located inside the compensating slot 1, exert their thrust on the face 'a' of the slot of the fixed deck by pressing on the side 'b' of this slot .
  • the compensating cylinders 2 exert their thrust on the face a of the slot 1 by relying on lateral support plates arranged parallel to the fixed deck.
  • the compensation slot is located only in the movable deck 5 and no compensation slot is made in the fixed deck 4.
  • the fixed apron 4 and in particular its working surface, namely the die holder 8, will tend to deform and its central part will then be lower than its ends.
  • the working surface of the movable deck 5, namely the punch holder 9, will deform and its central part will then be in a position higher than that of its ends.
  • the means 3 for measuring the deformation will transmit the information to the central analysis unit 7 which,. through the hydraulic circuit, give the order to the pistons of the compensating cylinders 2, located. in the compensation slot 1 inside the movable apron 5, to modify the curvature of the edge of the movable apron 5, namely the punch holder 9, so as to correspond exactly to the curvature of the fixed apron 4 on its edge, namely the die holder 8.
  • the correction system is arranged in a compensation slot 1 located in the deck.
  • the same correction system can be applied between the tool holder and the tool, that is to say between the die holder and the die and / or the punch holder and the punch.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Press Drives And Press Lines (AREA)
  • Buildings Adapted To Withstand Abnormal External Influences (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Valve Device For Special Equipments (AREA)

Abstract

La presse hydraulique comporte un tablier fixe (4) et un tablier mobile (5) et comprend, a l'interieur du tablier fixe, des moyens de pression (2) pour compenser les deformations se produisant lors du travail de la presse. Une centrale d'analyse (7) recoit les informations de moyens de mesure (3) de la deformation, qui se trouvent a l'interieur du tablier fixe et mobile et/ou entre porte-outil et les outils, et commande les moyens de pression (2) de facon que pendant la phase de travail, eventuellement prolongee jusqu'au moment de l'inversion du mouvement de travail, les deux outils soient exactement paralleles. Les avantages sont tels que l'on obtient un travail tres precis, sans etre oblige de recourir a l'habilete de l'operateur.The hydraulic press comprises a fixed apron (4) and a movable apron (5) and comprises, inside the fixed apron, pressure means (2) to compensate for the deformations occurring during the working of the press. A central analysis unit (7) receives the information on the means of measurement (3) of the deformation, which is located inside the fixed and mobile apron and / or between the tool holder and the tools, and controls the means of pressure (2) so that during the working phase, possibly extended until the moment of reversal of the working movement, the two tools are exactly parallel. The advantages are such that one obtains a very precise job, without being obliged to resort to the skill of the operator.

Description

Presse hydraulique comportant un tablier fixe et un tablier mobile Hydraulic press comprising a fixed deck and a movable deck
Dans les presses hydrauliques , notamment dans celles de gran¬ des dimensions , les déformations qui se produisent à l' intérieur des deux tabliers sont assez importantes. Elles changent à chaque opération , selon la forme, les dimensions et la qualité du matériel à plier.In hydraulic presses, especially in those of large dimensions, the deformations which occur inside the two decks are quite significant. They change with each operation, depending on the shape, dimensions and quality of the material to be folded.
On connaît aujourd'hui des systèmes qui essaient de compenser les effet négatifs de la flexion du tablier fixe et du tablier mobile : brevet suisse No 411755 , brevet suisse No 508426 et brevet français No 2078874. Ces dispositifs mécaniques et hydrauliques présentent l'incon¬ vénient d'obliger l'utilisateur à prédéterminer la déformation qu'il y aura à l'intérieur du tablier fixe et du tablier mobile , afin de la compenser avant l'opération de pliage. I ls nécessitent une longue période d'essai avant d'obtenir des résultats valables. Et souvent, le résultat obtenu n'est pas entièrement satisfaisant.Systems are known today which try to compensate for the negative effects of the bending of the fixed deck and of the movable deck: Swiss patent No 411755, Swiss patent No 508426 and French patent No 2078874. These mechanical and hydraulic devices have the incon¬ comes from forcing the user to predetermine the deformation that there will be inside the fixed deck and the movable deck, in order to compensate for it before the folding operation. They require a long trial period before obtaining valid results. And often the result obtained is not entirely satisfactory.
I l est en effet très difficile, dans le cas d'une presse-plieuse, de déterminer avec exactitude la flèche qu'on rencontrera sous la pression des cylindres pendant la phase de travail et immédiatement après . Et même si on voulait obtenir un résultat par calcul analytique , chose tout à fait faisable, on devrait refaire les calculs chaque fois que l'on change un des paramètres: la forme, l'angle de pliage , l'épaisseur, la résistance de la matière , l'outillage utilisé ou la longueur de pliage. De plus , si l'on calculait de cette façon la flèche due à la flexion à l'intérieur du tablier fixe et mobile , il subsisterait encore des erreurs considérables dues à la déformation du système de guidage.It is indeed very difficult, in the case of a press brake, to accurately determine the deflection that will be encountered under the pressure of the cylinders during the working phase and immediately after. And even if we wanted to obtain a result by analytical calculation, something quite feasible, we would have to redo the calculations each time we change one of the parameters: the shape, the bending angle, the thickness, the resistance of the material, the tools used or the length of folding. In addition, if one calculated in this way the deflection due to bending inside the fixed and movable apron, there would still be considerable errors due to the deformation of the guide system.
D'autre part, la flèche change continuellement pendant la phase de travail . Le calcul ne donnant que la flèche finale , le résultat sera très aléatoire , d'autant plus que des ôles de mêmes dimension et qualité , présentent des différences de résistance et d'épaisseur dues aux tolérances de fabrication .On the other hand, the deflection changes continuously during the working phase. As the calculation only gives the final deflection, the result will be very random, all the more so since the sheets of the same size and quality have differences in strength and thickness due to manufacturing tolerances.
Ainsi , une presse-plieuse , avant d'arriver à travail ler dans des marges de tolérance réduites , nécessite une longue période d'adaptation de la part de l'opérateur, et sa précision dépend de l'habileté de ce dernier.Thus, a press brake, before arriving to work in reduced margins of tolerance, requires a long period of adaptation on the part of the operator, and its precision depends on the skill of the latter.
OMPI Les inconvénients ci-dessus sont palliés d'une façon beaucoup plus précise selon la présente invention. Le but de celle-ci est de déterminer la flèche due à la déformation d'une presse-plieuse, non pas avant la période de travail sous effort, mais pendant toute la phase de travail .WIPO The above drawbacks are overcome in a much more precise manner according to the present invention. The purpose of this is to determine the deflection due to the deformation of a press brake, not before the work period under stress, but during the entire work phase.
L'idée consiste en effet à déterminer et compenser cette déformation pendant le cycle de pliage, en faisant des mesures précises de la flèche obtenue simultanément sous effort. Ces mesures sont analysées par une centrale pendant et/ou immédia- tement après la phase de travail , et les déformations sont com¬ pensées simultanément par une contre-déformation qu'on donne, jusqu'à ce que la matrice et l'outil soient parallèles .The idea is indeed to determine and compensate for this deformation during the folding cycle, by making precise measurements of the deflection obtained simultaneously under stress. These measurements are analyzed by a central unit during and / or immediately after the working phase, and the deformations are compensated simultaneously by a counter-deformation which is given, until the matrix and the tool are parallel.
A cet effet, la présente invention concerne une presse hydraulique, comportant un tablier fixe et un tablier mobile, telle que définie par la revendication 1 .To this end, the present invention relates to a hydraulic press, comprising a fixed deck and a movable deck, as defined by claim 1.
L'invention concerne également un procédé de mise en action tel que défini dans la revendication 15.The invention also relates to an actuation method as defined in claim 15.
Les avantages d'une presse hydraulique qui travaille selon l'idée de la présente invention sont évidents. On peut corriger d'une manière très précise la déformation du tablier fixe et/ou du tablier mobile , étant donné qu'on connaît la mesure exacte de la flèche. Cette correction est faite automatiquement et instantanément par la machine, à la suite des ordres donnés par une centrale d'analyse, sans avoir recours à l'habileté de l'opérateur. La correction peut être effectuée soit pendant la - phase de travail , soit pendant et après la phase de travail , soit seulement après la phase de travail .The advantages of a hydraulic press which operates according to the idea of the present invention are obvious. The deformation of the fixed deck and / or the movable deck can be corrected very precisely, since the exact measurement of the deflection is known. This correction is made automatically and instantly by the machine, following orders given by an analysis center, without resorting to the skill of the operator. The correction can be carried out either during the - working phase, or during and after the working phase, or only after the working phase.
Le choix relève uniquement de problèmes techniques qui dérivent de la forme de la presse , de la forme de l'outil , de la forme qu'on veut obtenir après façonnage et des matériaux employés.The choice is only due to technical problems which derive from the shape of the press, the shape of the tool, the shape you want to obtain after shaping and the materials used.
L'invention sera mieux comprise à l'aide des dessins annexés montrant, à titre d'exemple, la presse avec le dispositif selon l'invention. Dans les dessins ,The invention will be better understood with the aid of the appended drawings showing, by way of example, the press with the device according to the invention. In the drawings,
OMPI la fig . 1 représente une vue 3 /4 antérieure en perspective , d'une presse hydraulique à deux cylindres , avec fente de compensation , dans sa position de travail sans outil lage , la fig . 2 représente une vue 3/4 antérieure d'une presse hydrau- lique à deux cylindres , avec deux fentes de compen¬ sation , dans sa position de travail sans outillage , et la fig . 3 représente une coupe verticale selon A-A d'une variante d'exécution de la presse représentée à la fig . 1 .WIPO fig. 1 shows a front view 3/4 in perspective, of a hydraulic press with two cylinders, with compensation slot, in its working position without tool lage, fig. 2 shows a front 3/4 view of a hydraulic press with two cylinders, with two compensation slots, in its working position without tools, and FIG. 3 shows a vertical section along AA of an alternative embodiment of the press shown in FIG. 1.
La fig . 1 montre une presse hydraulique dans laquelle les pistons des cylindres de travail 6 se trouvent dans leur position d'effort, donc avec le tablier mobile 5 dans la phase de travail .Fig. 1 shows a hydraulic press in which the pistons of the working cylinders 6 are in their force position, therefore with the movable bulkhead 5 in the working phase.
Dans cette phase, il est évident que le tablier mobile 5 aura tendance à se courber , le point du milieu du tablier mobile 5 se trouvant plus haut que les deux extrémités . Pour la même raison , le tablier fixe 4 aura tendance à se courber de telle manière que le point du milieu du tablier fixe 4 se trouve plus bas que les extrémités dudit tablier.In this phase, it is obvious that the movable apron 5 will tend to bend, the point of the middle of the movable apron 5 being higher than the two ends. For the same reason, the fixed apron 4 will tend to bend so that the middle point of the fixed apron 4 is lower than the ends of said apron.
I l en résulte que la surface de travail des deux tabliers 4 et 5 , et par conséquent les surfaces des deux porte-outil , le porte-matrice 8 et le prote-poinçon 9 , ne sont plus parallèles.As a result, the working surface of the two aprons 4 and 5, and consequently the surfaces of the two tool holders, the die holder 8 and the punch guard 9, are no longer parallel.
Des moyens de mesure 3 permettent de mesurer la flèche due à ces déformations. I ls transmettent leurs informations à une centrale d'analyse 7. Cette centrale analyse les informations obtenues et commande aux cylindres de compensation 2 , qui sont situés à l'intérieur d'une fente de compensation 1 , de fournir une poussée complémentaire à l'intérieur du tablier fixe 4 , pour obtenir une courbure de la surface du porte-matrice 8 , courbure qui sera exactement la même et parallèle à la courbure de la surface du porte-poinçon 9. L'opération continue pendant toute la phase de travail , fournissant une correction totale permanente.Measuring means 3 make it possible to measure the deflection due to these deformations. They transmit their information to a central analysis unit 7. This central unit analyzes the information obtained and commands the compensation cylinders 2, which are located inside a compensation slot 1, to provide a complementary thrust to the inside the fixed apron 4, in order to obtain a curvature of the surface of the die holder 8, curvature which will be exactly the same and parallel to the curvature of the surface of the punch holder 9. The operation continues throughout the working phase, providing a permanent total correction.
De ce fait, les déformations dues à la flexion dans les tabliers fixe et mobile , qui étaient de sens opposé et qui donnaient dans les parties les plus éloignées des cylindres de travail 6 une erreur considérable, peuvent être corrigées par une contre-déformation obtenue par la poussée des cylindres de compensation 2 à l'intérieur de la fente de compensation 1 . La fig . 2 montre une deuxième forme d'exécution de l'invention . Elle concerne une presse hydraulique dans laquelle ont été réalisées deux fentes de compensation 1 , l'une dans le tablier fixe 4 et l'autre dans le tablier mobile 5. La presse est montrée dans sa phase de travail , dans laquelle les cylindres de travail 6 ont les pistons dans leur position sous effort. Dans cette position , le porte-matrice 8 a tendance à se déformer dans sa partie centrale vers le bas par rapport à ses extrémités, tandis que le tablier mobile 5 et notamment le porte-poinçon 9 ont tendance à se déformer de façon que la partie centrale de l'outil se trouve plus élevée que les extrémités dudit porte-poinçon .Therefore, the deformations due to bending in the fixed and mobile aprons, which were in opposite directions and which gave in the most distant parts of the working rolls 6 a considerable error, can be corrected by a counter-deformation obtained by the thrust of the compensation cylinders 2 inside the compensation slot 1. Fig. 2 shows a second embodiment of the invention. It relates to a hydraulic press in which two compensation slots 1 have been made, one in the fixed deck 4 and the other in the movable deck 5. The press is shown in its working phase, in which the working cylinders 6 have the pistons in their position under stress. In this position, the die holder 8 tends to deform in its central part downwards relative to its ends, while the movable apron 5 and in particular the punch holder 9 tend to deform so that the part center of the tool is higher than the ends of said punch holder.
Pour cette raison , si l'on utilise toute la longueur de la presse ou si la pièce à façonner est centrée sur la presse, le pliage sera irrégulier en raison de la pénétration insuffisante de l'outil au milieu de la presse.For this reason, if the entire length of the press is used or if the workpiece is centered on the press, bending will be irregular due to insufficient penetration of the tool in the middle of the press.
Lorsque les deux tabliers fixe 4 et mobile 5 sont sous effort, des moyens 3 pour mesurer la déformation , à partir de paramètres tels que la profondeur de pénétration de l'outil ou l'angle de pliage de la pièce, envoient à la centrale d'analyse 7 les données nécessaires pour établir avec quel effort les pistons 2 des fentes de compensation 1 supérieure et inférieure doivent intervenir pour annuler la déformation sur les bords des deux tabliers.When the two fixed aprons 4 and mobile 5 are under stress, means 3 for measuring the deformation, on the basis of parameters such as the penetration depth of the tool or the bending angle of the part, send to the central 'analysis 7 the data necessary to establish with what effort the pistons 2 of the upper and lower compensation slots 1 must intervene to cancel the deformation on the edges of the two decks.
Par l'intermédiaire d'un circuit hydraulique la centrale d'analyse commande les pistons des cylindres de compensation 2 de façon à compenser entièrement la flexion dans le tablier mobile 5 et dans le tablier fixe 4. Le porte-matrice 8 et le porte-poinçon 9 sont ramenés chacun à une ligne droite, exactement parallèle l'un à l'autre. Dans les presses représentées aux fig . 1 et 2 , les cylindres de compensation 2 , situés à l'intérieur de la fente de compensation 1 , exercent leur poussée sur la face 'a' de la fente du tablier fixe en s'appuyant sur la face 'b' de cette fente.By means of a hydraulic circuit, the central analysis unit controls the pistons of the compensating cylinders 2 so as to fully compensate for the bending in the movable deck 5 and in the fixed deck 4. The die holder 8 and the holder punch 9 are each reduced to a straight line, exactly parallel to each other. In the presses shown in fig. 1 and 2, the compensating cylinders 2, located inside the compensating slot 1, exert their thrust on the face 'a' of the slot of the fixed deck by pressing on the side 'b' of this slot .
Dans une variante d'exécution , représentée à la fig . 3 , les cylindres de compensation 2 exercent leur poussée sur la face a de la fente 1 en s'appuyant sur des plaques d'appui latérales disposées parallèlement au tablier fixe. Dans une autre forme d'exécution non représentée, la fente de compensation est située seulement dans le tablier mobile 5 et aucune fente de compensation n'est pratiquée dans le tablier fixe 4.In an alternative embodiment, shown in FIG. 3, the compensating cylinders 2 exert their thrust on the face a of the slot 1 by relying on lateral support plates arranged parallel to the fixed deck. In another embodiment, not shown, the compensation slot is located only in the movable deck 5 and no compensation slot is made in the fixed deck 4.
Dans ce cas , le tablier fixe 4 , et notamment sa surface de travail , à savoir le porte-matrice 8 , aura tendance à se déformer et sa partie centrale se trouvera alors plus bas que ses extrémités. Dans le même temps , la surface de travail du tablier mobile 5 , à savoir le porte-poinçon 9 , se déformera et sa partie centrale se trouvera alors dans une position plus élevée que celle de ses extrémités.In this case, the fixed apron 4, and in particular its working surface, namely the die holder 8, will tend to deform and its central part will then be lower than its ends. At the same time, the working surface of the movable deck 5, namely the punch holder 9, will deform and its central part will then be in a position higher than that of its ends.
A ce moment-là , les moyens de mesure 3 de la déformation transmettront l'information à la centrale d'analyse 7 qui , . par l'intermédiaire du circuit hydraulique , donnera l'ordre aux pistons des cylindres de compensation 2 , situés . dans la fente de compensation 1 à l'intérieur du tablier mobile 5 , de modifier la courbure du bord du tablier mobile 5 , à savoir le porte-poinçon 9 , de façon à correspondre exactement à la courbure du tablier fixe 4 sur son bord , à savoir le porte-matrice 8.At this time, the means 3 for measuring the deformation will transmit the information to the central analysis unit 7 which,. through the hydraulic circuit, give the order to the pistons of the compensating cylinders 2, located. in the compensation slot 1 inside the movable apron 5, to modify the curvature of the edge of the movable apron 5, namely the punch holder 9, so as to correspond exactly to the curvature of the fixed apron 4 on its edge, namely the die holder 8.
Dans les formes d'exécution ci-dessus , le système de correction est disposé dans une fente de compensation 1 située dans le tablier.In the above embodiments, the correction system is arranged in a compensation slot 1 located in the deck.
Le même système de correction peut être appliqué entre le porte-outil et l'outil , c'est-à-dire entre le porte-matrice et la matrice et/ou le porte-poinçon et le poinçon .The same correction system can be applied between the tool holder and the tool, that is to say between the die holder and the die and / or the punch holder and the punch.
L'invention a été décrite dans des formes d'exécution particulières , mais il est évident que des changements d'exécution, tels que inversion du tablier fixe et mobile , ou d'utilisation de machines multicylindres et machines spéciales , n'apportent rien à l'idée d'utiliser une fente de compensation commandée par une centrale d'analyse. The invention has been described in particular embodiments, but it is obvious that changes in execution, such as reversing the fixed and movable deck, or the use of multi-cylinder machines and special machines, do nothing to the idea of using a compensation slot controlled by a central analysis unit.

Claims

REVENDI CATIONSREVENDI CATIONS
1 Presse hydraulique comportant un tablier fixe et un tablier mobile, un des tabliers au moins supportant un outil, CARACTERISEE EN CE QU' elle comporte au moins un moyen de pression (2) destiné à compenser les déformations dues au travail de la presse.1 Hydraulic press comprising a fixed apron and a movable apron, at least one of the aprons supporting a tool, CHARACTERIZED IN THAT it comprises at least one pressure means (2) intended to compensate for the deformations due to the work of the press.
2 Presse hydraulique selon la revendication 1 , caractérisée en ce qu'au moins un moyen de pression (2) est supporté par au moins un des tabliers.2 hydraulic press according to claim 1, characterized in that at least one pressure means (2) is supported by at least one of the aprons.
3 Presse hydraulique selon la revendication 1 , caractérisée en ce qu'au moins un moyen de pression (2 ) est supporté par au moins un des porte-outil.3 Hydraulic press according to claim 1, characterized in that at least one pressure means (2) is supported by at least one of the tool holders.
4 Presse hydraulique selon la revendication 2 , caractérisée en ce que les moyens de pression sont situés à l'intérieur d'une fente.4 hydraulic press according to claim 2, characterized in that the pressure means are located inside a slot.
5 Presse hydraulique selon la revendication 4, caractérisée en ce que les moyens de pression sont agencés de façon à exercer leur poussée sur une première face (a) de la fente en s'appuyant sur une deuxième face (b) de la fente.5 hydraulic press according to claim 4, characterized in that the pressure means are arranged so as to exert their thrust on a first face (a) of the slot by pressing on a second face (b) of the slot.
6 Presse hydraulique selon la revendication 4 , caractérisée en ce que les moyens de pression sont agencés de façon à exercer leur poussée sur une première face (a) de la fente en s'appuyant sur au moins une plaque latérale parallèle au tablier fixe.6 hydraulic press according to claim 4, characterized in that the pressure means are arranged to exert their thrust on a first face (a) of the slot by pressing on at least one side plate parallel to the fixed deck.
7 Presse hydraulique selon une des revendication 1 à 6 , caractérisée en ce qu'au moins un des tabliers comporte sur son bord au moins un moyen de mesure destiné à mesurer la déformation .7 Hydraulic press according to one of claims 1 to 6, characterized in that at least one of the aprons has on its edge at least one measuring means for measuring the deformation.
8 Presse hydraulique selon la revendication 7 , caractérisée en ce que le moyen de mesure est un dispositif mesurant la pénétration de l'outil.8 Hydraulic press according to claim 7, characterized in that the measuring means is a device measuring the penetration of the tool.
9 Presse hydraulique selon la revendication 7 , caractérisée en ce que le moyen de mesure est un dispositif mesurant l'angle de pliage de la pièce à plier. 10 Presse hydraulique selon une des revendications 7 à 9 , caractérisée en ce qu'elle est reliée à une centrale d'analyse des informations obtenues à l'aide des moyens de mesure de la déformation. 1 1 Presse hydraulique selon la revendication 10 , caractérisée en ce que la centrale d'analyse est électronique.9 Hydraulic press according to claim 7, characterized in that the measuring means is a device measuring the bending angle of the part to be bent. 10 Hydraulic press according to one of claims 7 to 9, characterized in that it is connected to a central analysis of information obtained using the means of measuring the deformation. 1 1 Hydraulic press according to claim 10, characterized in that the central analysis is electronic.
12 Presse hydraulique selon une des revendications 10 ou 1 1 , caractérisée en ce que les moyens de pression agissent sur commande de la centrale d'analyse de façon à obtenir une distance constante sur toute la longueur entre les deux porte-outil .12 Hydraulic press according to one of claims 10 or 1 1, characterized in that the pressure means act on command of the central analysis so as to obtain a constant distance over the entire length between the two tool holders.
13 Presse hydraulique selon une des revendications 1 à 12 , caractérisée en ce que le ou les moyens de pression sont constitués par des cylindres de compensation.13 Hydraulic press according to one of claims 1 to 12, characterized in that the pressure means or means consist of compensating cylinders.
14 Presse hydraulique selon la revendication 14 , caractérisée en ce que le piston du ou des cylindres de compensation est déplacé à l'aide d'un système hydraulique.14 Hydraulic press according to claim 14, characterized in that the piston of the compensating cylinder or cylinders is moved using a hydraulic system.
15 Procédé de mise en action de la presse selon une des revendi¬ cations 1 à 14 , caractérisé en ce qu'on compense la déformation pendant au moins une partie de la période couvrant la phase de travail prolongée jusqu'au moment de l'inversion du mouvement de travail .15 Method of actuating the press according to one of claims 1 to 14, characterized in that the deformation is compensated for at least part of the period covering the extended working phase until the moment of inversion of the work movement.
16 Procédé de mise en action de la presse selon la revendication 15 , caractérisé en ce qu'on compense la déformation pendant toute la phase de travail. 17 Procédé de mise en action de la presse selon la revendication 15 , caractérisé en ce qu'on compense la déformation pendant la phase de travail prolongée jusqu'au moment de l'inversion du mouvement de travail .16 A method of actuating the press according to claim 15, characterized in that compensates for the deformation during the entire working phase. 17 A method of actuating the press according to claim 15, characterized in that the deformation is compensated for during the extended working phase until the moment of reversal of the working movement.
18 Procédé de mise en action de la presse selon la revendication 15 , caractérisé en ce qu'on compense la déformation après la phase de travail , jusqu'au moment de l'inversion du mouvement de travail .18 A method of actuating the press according to claim 15, characterized in that compensates for the deformation after the working phase, until the moment of reversal of the working movement.
OMPI WIPO
EP82900209A 1981-01-13 1982-01-11 Hydraulic press comprising a fixed apron and a moving apron Withdrawn EP0068008A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH175/81 1981-01-13
CH17581A CH640175A5 (en) 1981-01-13 1981-01-13 Hydraulic press having an apron and fixed mobile apron.

Publications (1)

Publication Number Publication Date
EP0068008A1 true EP0068008A1 (en) 1983-01-05

Family

ID=4180969

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82900209A Withdrawn EP0068008A1 (en) 1981-01-13 1982-01-11 Hydraulic press comprising a fixed apron and a moving apron

Country Status (10)

Country Link
EP (1) EP0068008A1 (en)
JP (1) JPS58500011A (en)
KR (1) KR830008831A (en)
BR (1) BR8205455A (en)
CH (1) CH640175A5 (en)
DK (1) DK402182A (en)
IT (1) IT1147573B (en)
NO (1) NO823008L (en)
WO (1) WO1982002360A1 (en)
ZA (1) ZA82109B (en)

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Also Published As

Publication number Publication date
IT8247545A0 (en) 1982-01-13
CH640175A5 (en) 1983-12-30
WO1982002360A1 (en) 1982-07-22
JPS58500011A (en) 1983-01-06
KR830008831A (en) 1983-12-16
DK402182A (en) 1982-09-09
BR8205455A (en) 1982-12-14
NO823008L (en) 1982-09-06
ZA82109B (en) 1982-11-24
IT1147573B (en) 1986-11-19

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