EP0445051A1 - Hydraulic clamping device - Google Patents

Hydraulic clamping device Download PDF

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Publication number
EP0445051A1
EP0445051A1 EP91420067A EP91420067A EP0445051A1 EP 0445051 A1 EP0445051 A1 EP 0445051A1 EP 91420067 A EP91420067 A EP 91420067A EP 91420067 A EP91420067 A EP 91420067A EP 0445051 A1 EP0445051 A1 EP 0445051A1
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EP
European Patent Office
Prior art keywords
finger
jaw
casing
groove
elastically deformable
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP91420067A
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German (de)
French (fr)
Other versions
EP0445051B1 (en
Inventor
Arthur Schwab
Thomas Schick
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.)
Staeubli GmbH
Original Assignee
Staeubli und Trumpelt GmbH Maschinenfabrik
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 Staeubli und Trumpelt GmbH Maschinenfabrik filed Critical Staeubli und Trumpelt GmbH Maschinenfabrik
Priority to AT91420067T priority Critical patent/ATE94109T1/en
Publication of EP0445051A1 publication Critical patent/EP0445051A1/en
Application granted granted Critical
Publication of EP0445051B1 publication Critical patent/EP0445051B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/02—Dies; Inserts therefor; Mounting thereof; Moulds
    • B30B15/026—Mounting of dies, platens or press rams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B5/00—Clamps
    • B25B5/06—Arrangements for positively actuating jaws
    • B25B5/061—Arrangements for positively actuating jaws with fluid drive
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B5/00—Clamps
    • B25B5/06—Arrangements for positively actuating jaws
    • B25B5/061—Arrangements for positively actuating jaws with fluid drive
    • B25B5/064—Arrangements for positively actuating jaws with fluid drive with clamping means pivoting around an axis perpendicular to the pressing direction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B5/00—Clamps
    • B25B5/06—Arrangements for positively actuating jaws
    • B25B5/08—Arrangements for positively actuating jaws using cams
    • B25B5/087—Arrangements for positively actuating jaws using cams actuated by a hydraulic or pneumatic piston

Definitions

  • the present invention relates to hydraulically actuated devices for clamping removable parts on a fixed support, and it relates more particularly to devices of this type used for the interchangeable fixing of the two opening elements of the molds against the fixed and movable plates. conventional molding presses.
  • hydraulic clamping devices generally use a control finger which is linked to the piston of a hydraulic actuating cylinder and which is associated with a jaw able to move transversely relative to the axis of the aforementioned finger. , which finger and jaw come into contact with each other by means of oblique faces so that the axial displacement of the finger causes the application of the jaw against the workpiece to be clamped.
  • the movable elements namely the control finger and the clamping jaw, comprise practically no protection from the environment, so that the risks of seizures more or less pronounced under the effect of dust, shavings or the like are not negligible, giving rise to relatively frequent dismantling and reassembly operations.
  • the present invention mainly aims to remedy, which relates to the hydraulic clamping device defined in claim 1.
  • the elastically deformable means for the axial connection of the control finger and the casing can take different forms, for example that of a compression spring mounted on the rod which joins the piston of the hydraulic actuation system to the control finger, said spring being interposed between the annular faces facing said piston and the jaw housing.
  • a split ring capable of contracting radially against its elastic resistance to deformation.
  • This split ring is normally housed partly in a groove made in the inner wall of the bore of the jaw housing and partly in a similar groove made in the outer wall of the control finger, thereby ensuring the axial connection of this last with the housing. It is nevertheless understood that when this casing reaches the end of the stroke, the ring contracts to penetrate completely into the groove of the finger which is thus free to continue its stroke to operate the clamping; during the return movement of the finger, the split ring resumes its initial profile elastically.
  • the device shown in fig. 1 and 2 essentially comprises a body 1 which is pierced longitudinally with a bore comprising three parts established at different diameters and referenced 10, 11 and 12.
  • the part 12 with a smaller diameter opens on one of the transverse faces of the body 1 while the opposite part 10 with a larger diameter is closed by a flange 13.
  • a piston 2 axially integral with a rod 20 which extends opposite of said piston in the form of a cylindrical control finger 21, which is hollowed out by an annular groove referenced 22 in FIG. 2.
  • This finger 21 is in fact enclosed inside a cylindrical casing 3 the periphery of which has two diameters which correspond, with very little play, to the diameters of the parts 11 and 12 of the longitudinal bore of the body 1. From side of the piston 2, this casing 3 is closed annularly by a flange 30 which slides freely on the rod 20, while on the opposite there is provided a transverse bottom 31 immediately behind which is formed an opening 32 facing downwards .
  • a clamping jaw 4 is slidably mounted, the upper face 40 of which is provided oblique to cooperate with the corresponding bearing face 23, itself oblique, made longitudinally at the end of the finger 21
  • This jaw 4 is associated with elastic means which tend to point it upwards with its face 40 in contact with the mating face 23.
  • connection between the finger 21 and the casing 3 is effected by means of a split ring 5 (see fig. 2) which is normally housed partly in the aforementioned groove 22 of the finger 21 and partly in a groove 33 made in the inner wall of the housing 3.
  • the body 1 was assumed to be fixed to a fixed support A, constituted for example by one of the two plates of an injection press, in order to ensure the clamping of an ear B of one of the elements of mold.

Abstract

The jaw (4) is carried by a mobile protective casing (3) which surrounds the control rod (21) such that it is lowered after the said casing has arrived at the end of its travel while the rod mentioned above continues its longitudinal travel. The axial connection between the casing and the rod is operated by means of a split ring (5) capable of retracting radially during the clamping. <IMAGE>

Description

La présente invention a trait aux dispositifs à actionnement hydraulique pour le bridage de pièces démontables sur un support fixe, et elle vise plus particulièrement les dispositifs de ce type utilisés pour la fixation interchangeable des deux éléments ouvrants des moules de conformation contre les plateaux fixe et mobile des presses classiques de moulage.The present invention relates to hydraulically actuated devices for clamping removable parts on a fixed support, and it relates more particularly to devices of this type used for the interchangeable fixing of the two opening elements of the molds against the fixed and movable plates. conventional molding presses.

On sait que les dispositifs de bridage hydrauliques font généralement appel à un doigt de commande qui est lié au piston d'un vérin hydraulique d'actionnement et qui est associé à un mors apte à se déplacer transversalement par rapport à l'axe du doigt précité, lesquels doigt et mors viennent au contact l'un de l'autre par l'intermédiaire de faces obliques de manière à ce que le déplacement axial du doigt provoque l'application du mors contre la pièce à brider.It is known that hydraulic clamping devices generally use a control finger which is linked to the piston of a hydraulic actuating cylinder and which is associated with a jaw able to move transversely relative to the axis of the aforementioned finger. , which finger and jaw come into contact with each other by means of oblique faces so that the axial displacement of the finger causes the application of the jaw against the workpiece to be clamped.

Dans les dispositifs classiques de ce genre, les éléments mobiles, à savoir le doigt de commande et le mors de bridage, ne comportent pratiquement aucune protection vis-à-vis de l'environnement, de sorte que les risques de grippages plus ou moins prononcés sous l'effet de poussières, copeaux ou autres ne sont pas négligeables, en donnant lieu à des opérations de démontage et de remontage relativement fréquentes.In conventional devices of this kind, the movable elements, namely the control finger and the clamping jaw, comprise practically no protection from the environment, so that the risks of seizures more or less pronounced under the effect of dust, shavings or the like are not negligible, giving rise to relatively frequent dismantling and reassembly operations.

C'est à cet inconvénient qu'entend principalement remédier la présente invention, laquelle a pour objet le dispositif de bridage hydraulique défini à la revendication 1.It is to this drawback that the present invention mainly aims to remedy, which relates to the hydraulic clamping device defined in claim 1.

En fait l'invention consiste essentiellement à monter le mors en bout d'un carter qui enveloppe le doigt de commande et qui est lié à ce dernier par des moyens élastiquement déformables. La course longitudinale de ce carter porte-mors est limitée par rapport à celle du doigt, de sorte que la commande du mors intervient automatiquement lorsque ledit doigt poursuit sa course après que le carter se soit immobilisé en fin de course.In fact, the invention essentially consists in mounting the jaw at the end of a casing which envelops the control finger and which is linked to the latter by elastically deformable means. The longitudinal stroke of this jaw housing is limited relative to that of the finger, so that the jaw control intervenes automatically when said finger continues its travel after the housing has stopped at the end of its travel.

Les moyens élastiquement déformables pour la liaison axiale du doigt de commande et du carter peuvent prendre différentes formes, par exemple celle d'un ressort de compression monté sur la tige qui réunit le piston du système hydraulique d'actionnement au doigt de commande, ledit ressort étant interposé entre les faces annulaires en vis-à-vis dudit piston et du carter porte-mors.The elastically deformable means for the axial connection of the control finger and the casing can take different forms, for example that of a compression spring mounted on the rod which joins the piston of the hydraulic actuation system to the control finger, said spring being interposed between the annular faces facing said piston and the jaw housing.

Toutefois, conformément à un mode de mise en oeuvre préféré de l'invention, pour cette liaison on a recours à un anneau fendu susceptible de se contracter radialement à l'encontre de sa résistance élastique à la déformation. Cet anneau fendu est normalement logé pour partie dans une gorge ménagée dans la paroi intérieure de l'alésage du carter porte-mors et pour partie dans une gorge semblable pratiquée dans la paroi extérieure du doigt de commande, en assurant ainsi la liaison axiale de ce dernier avec le carter. On conçoit néanmoins que lorsque ce carter arrive en fin de course, l'anneau se contracte pour pénétrer complètement dans la gorge du doigt qui est ainsi libre de poursuivre sa course pour opérer le bridage ; lors du mouvement de retour du doigt, l'anneau fendu reprend élastiquement son profil initial.However, in accordance with a preferred embodiment of the invention, for this connection, use is made of a split ring capable of contracting radially against its elastic resistance to deformation. This split ring is normally housed partly in a groove made in the inner wall of the bore of the jaw housing and partly in a similar groove made in the outer wall of the control finger, thereby ensuring the axial connection of this last with the housing. It is nevertheless understood that when this casing reaches the end of the stroke, the ring contracts to penetrate completely into the groove of the finger which is thus free to continue its stroke to operate the clamping; during the return movement of the finger, the split ring resumes its initial profile elastically.

Le dessin annexé, donné à titre d'exemple, permettra de mieux comprendre l'invention, les caractéristiques qu'elle présente et les avantages qu'elle est susceptible de procurer :

  • Fig. 1 est une coupe axiale schématique montrant l'agencement général d'un dispositif de bridage hydraulique établi conformément à l'invention.
  • Fig. 2 est une coupe transversale suivant le plan indiqué en II-II en fig. 1.
  • Fig. 3 et 4 reproduisent à plus petite échelle fig. 1 pour illustrer le fonctionnement du dispositif, les pièces étant représentées à deux autres positions.
The appended drawing, given by way of example, will allow a better understanding of the invention, the characteristics which it presents and the advantages which it is capable of providing:
  • Fig. 1 is a schematic axial section showing the general arrangement of a hydraulic clamping device established in accordance with the invention.
  • Fig. 2 is a cross section along the plane indicated in II-II in FIG. 1.
  • Fig. 3 and 4 reproduce on a smaller scale fig. 1 to illustrate the operation of the device, the parts being shown in two other positions.

Le dispositif représenté en fig. 1 et 2 comprend essentiellement un corps 1 qui est percé longitudinalement d'un alésage comportant trois parties établies à des diamètres différents et référencées 10, 11 et 12. La partie 12 à plus petit diamètre s'ouvre sur l'une des faces transversales du corps 1 tandis que la partie opposée 10 à plus grand diamètre est fermée par un flasque 13.The device shown in fig. 1 and 2 essentially comprises a body 1 which is pierced longitudinally with a bore comprising three parts established at different diameters and referenced 10, 11 and 12. The part 12 with a smaller diameter opens on one of the transverse faces of the body 1 while the opposite part 10 with a larger diameter is closed by a flange 13.

A l'intérieur de la partie 10 coulisse axialement de manière étanche un piston 2 solidaire axialement d'une tige 20 qui se prolonge à l'opposé dudit piston sous la forme d'un doigt cylindrique de commande 21, lequel est creusé d'une gorge annulaire référencée 22 en fig. 2.Inside the part 10 slides axially in a sealed manner a piston 2 axially integral with a rod 20 which extends opposite of said piston in the form of a cylindrical control finger 21, which is hollowed out by an annular groove referenced 22 in FIG. 2.

Ce doigt 21 est en fait enfermé à l'intérieur d'un carter cylindrique 3 dont la périphérie présente deux diamètres qui correspondent, à un très léger jeu près, aux diamètres des parties 11 et 12 de l'alésage longitudinal du corps 1. Du côté du piston 2, ce carter 3 est fermé annulairement par une bride 30 qui coulisse librement sur la tige 20, tandis qu'à l'opposé il est prévu un fond transversal 31 immédiatement en arrière duquel est ménagée une ouverture 32 tournée vers le bas.This finger 21 is in fact enclosed inside a cylindrical casing 3 the periphery of which has two diameters which correspond, with very little play, to the diameters of the parts 11 and 12 of the longitudinal bore of the body 1. From side of the piston 2, this casing 3 is closed annularly by a flange 30 which slides freely on the rod 20, while on the opposite there is provided a transverse bottom 31 immediately behind which is formed an opening 32 facing downwards .

C'est dans cette ouverture transversale 32 qu'est monté à coulissement un mors de bridage 4 dont la face supérieure 40 est prévue oblique pour coopérer avec la face d'appui correspondante 23, elle-même oblique, pratiquée longitudinalement en bout du doigt 21. A ce mors 4 sont associés des moyens élastiques qui tendent à le rappeler vers le haut avec sa face 40 au contact de la face conjuguée 23. Ces moyens n'ont pas été détaillés sur le dessin ; on peut aisément les imaginer sous la forme de tiges verticales portées latéralement par le mors 4 et engagées à coulissement dans des ouvertures du carter 3 avec interposition de ressorts de rappel.It is in this transverse opening 32 that a clamping jaw 4 is slidably mounted, the upper face 40 of which is provided oblique to cooperate with the corresponding bearing face 23, itself oblique, made longitudinally at the end of the finger 21 This jaw 4 is associated with elastic means which tend to point it upwards with its face 40 in contact with the mating face 23. These means have not been detailed in the drawing; one can easily imagine them in the form of vertical rods carried laterally by the jaw 4 and slidably engaged in openings of the casing 3 with interposition of return springs.

La liaison entre le doigt 21 et le carter 3 est opérée à l'aide d'un anneau fendu 5 (voir fig. 2) qui est normalement logé pour partie dans la gorge 22 précitée du doigt 21 et pour partie dans une gorge 33 pratiquée dans la paroi intérieure du carter 3.The connection between the finger 21 and the casing 3 is effected by means of a split ring 5 (see fig. 2) which is normally housed partly in the aforementioned groove 22 of the finger 21 and partly in a groove 33 made in the inner wall of the housing 3.

Aux deux extrémités de la chambre délimitée par la partie 10 à grand diamètre de l'alésage longitudinal du corps 1 débouchent deux canalisations 6 et 7 reliées au distributeur d'une installation de fluide hydraulique. Le corps 1 a été supposé fixé à un support fixe A, constitué par exemple par l'un des deux plateaux d'une presse d'injection, en vue d'assurer le bridage d'une oreille B de l'un des éléments de moule.At the two ends of the chamber delimited by the large-diameter part 10 of the longitudinal bore of the body 1 open two pipes 6 and 7 connected to the distributor of a hydraulic fluid installation. The body 1 was assumed to be fixed to a fixed support A, constituted for example by one of the two plates of an injection press, in order to ensure the clamping of an ear B of one of the elements of mold.

Si, partant de la position débridée suivant fig. 1, on admet le fluide hydraulique à travers la canalisation arrière 6 (flèche F1 de fig. 3), la pression s'exerce sur le piston 2 qui se déplace vers l'avant avec la tige 20, le doigt 21 et, par suite de la présence de l'anneau fendu 5, le carter 3, de sorte que c'est tout l'équipage mobile 2-3-4-5 qui se déplace vers l'avant, jusqu'à ce que l'épaulement périphérique du carter 3 vienne en butée contre l'épaulement annulaire séparant les parties 11 et 12 de l'alésage du corps 1 (position représentée en fig. 3).If, starting from the unbridled position according to fig. 1, the hydraulic fluid is admitted through the rear pipe 6 (arrow F1 of fig. 3), the pressure is exerted on the piston 2 which moves forward with the rod 20, the finger 21 and, consequently the presence of the split ring 5, the casing 3, so that the entire 2-3-4-5 moving assembly is moves forward, until the peripheral shoulder of the casing 3 abuts against the annular shoulder separating the parts 11 and 12 of the bore of the body 1 (position shown in fig. 3).

A ce moment, l'alimentation F1 se poursuivant alors que le carter 3 ne peut plus avancer, l'ensemble 2-20-21 poursuit seul sa course par rapport audit carter immobilisé, ce qui a pour effet d'abaisser le mors 4 sur l'oreille B par suite de la coopération des faces obliques 23 et 40. L'oreille B est ainsi fermement appliquée par le dispositif contre le support A, l'effort d'application étant fonction de la puissance de l'installation hydraulique jointe à l'angle d'obliquité des faces 23 et 40 conjuguées.At this time, the feeding F1 continuing while the casing 3 can no longer advance, the assembly 2-20-21 continues its course alone with respect to said immobilized casing, which has the effect of lowering the jaw 4 on the ear B as a result of the cooperation of the oblique faces 23 and 40. The ear B is thus firmly applied by the device against the support A, the application force being a function of the power of the hydraulic installation joined to the angle of obliquity of the faces 23 and 40 combined.

Pour le débridage, il suffit d'alimenter en fluide sous pression la canalisation 7 suivant la flèche F2 de fig. 4. Le fluide s'applique simultanément contre la bride 30 et contre la face du piston 2, mais comme cette dernière présente une plus grande surface, ledit piston ramène le doigt 21 à la position initiale. Lorsque l'anneau fendu 5, qui s'était contracté radialement en fin de course du carter 3 en se logeant complètement dans la rainure 22 du doigt 21 (flèche F3 fig. 2), arrive, au cours du mouvement de recul du doigt 21, au niveau de la gorge 33, il reprend élastiquement son profil normal et pénètre dans ladite gorge 33, en étant ainsi revenu en position pour assurer un nouveau fonctionnement. Le retour positif du carter 3 à la position initiale est opérée par portée de la face annulaire du doigt 21 contre la partie de la bride 30 qui borde la tige 20.For unclamping, it suffices to supply pressurized fluid to the pipe 7 according to the arrow F2 in FIG. 4. The fluid is applied simultaneously against the flange 30 and against the face of the piston 2, but since the latter has a larger surface, said piston returns the finger 21 to the initial position. When the split ring 5, which had contracted radially at the end of the travel of the casing 3 while being completely housed in the groove 22 of the finger 21 (arrow F3 fig. 2), arrives, during the movement of recoil of the finger 21 , at the level of the groove 33, it resumes its normal profile elastically and enters said groove 33, thus being returned to position to ensure a new operation. The positive return of the casing 3 to the initial position is effected by bearing the annular face of the finger 21 against the part of the flange 30 which borders the rod 20.

L'opération de débridage est ainsi garantie, même dans le cas où le mors 4 et/ou ledit carter 3 seraient retenus par effet de collage ou de grippage. On notera au surplus que le mors 4 et le doigt 21 sont efficacement protégés de l'environnement par le carter 3.The unclamping operation is thus guaranteed, even in the case where the jaw 4 and / or said casing 3 are retained by gluing or seizing effect. It will also be noted that the jaw 4 and the finger 21 are effectively protected from the environment by the casing 3.

Claims (2)

Dispositif de bridage hydraulique, notamment pour la fixation amovible des éléments de moules sur les plateaux des presses de moulage, du genre dans lequel le piston du système hydraulique est rigidement solidaire d'un doigt de commande qui prend appui, par l'intermédiaire de faces obliques, contre un mors de bridage mobile transversalement par rapport audit doigt de façon à ce que le déplacement axial de celui-ci provoque l'application de ce mors contre la pièce à brider, caractérisé en ce que le mors est porté par un carter qui, enveloppant le doigt de commande, est lié axialement à celui-ci par des moyens élastiquement déformables et qui comporte une course longitudinale limitée par rapport à celle de ce doigt de façon telle que l'actionnement du mors résulte de la poursuite du déplacement dudit doigt après immobilisation du carter en fin de course.Hydraulic clamping device, in particular for the removable fixing of the mold elements on the plates of the molding presses, of the kind in which the piston of the hydraulic system is rigidly secured to a control finger which is supported by means of faces oblique, against a clamping jaw movable transversely with respect to said finger so that the axial displacement of the latter causes the application of this jaw against the workpiece, characterized in that the jaw is carried by a casing which , enveloping the control finger, is axially linked thereto by elastically deformable means and which has a longitudinal stroke limited relative to that of this finger so that the actuation of the jaw results from the continued movement of said finger after immobilization of the crankcase at the end of the stroke. Dispositif suivant la revendication 1, caractérisé en ce que les moyens élastiquement déformables de liaison sont constitués par un anneau fendu (5) qui est logé pour partie dans une gorge (33) ménagée dans le paroi intérieure de l'alésage du carter (3) et pour partie dans une gorge (22) pratiquée dans la périphérie du doigt (2), lequel anneau est apte par contraction radiale à s'éclipser entièrement dans ladite gorge (22) du doigt lorsque ce dernier poursuit sa course après immobilisation axiale du carter, la réaction élastique assurant le rappel au profil initial lors du retour de ce carter à la position reculée sous l'action du doigt.Device according to claim 1, characterized in that the elastically deformable connecting means consist of a split ring (5) which is partly housed in a groove (33) formed in the inner wall of the housing bore (3) and partly in a groove (22) formed in the periphery of the finger (2), which ring is able by radial contraction to be completely eclipsed in said groove (22) of the finger when the latter continues its race after axial immobilization of the housing , the elastic reaction ensuring the return to the initial profile when the casing returns to the retracted position under the action of the finger.
EP91420067A 1990-02-28 1991-02-27 Hydraulic clamping device Expired - Lifetime EP0445051B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT91420067T ATE94109T1 (en) 1990-02-28 1991-02-27 HYDRAULIC TENSIONING DEVICE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9002761A FR2656819B1 (en) 1990-02-28 1990-02-28 HYDRAULIC CLAMPING DEVICE.
FR9002761 1990-02-28

Publications (2)

Publication Number Publication Date
EP0445051A1 true EP0445051A1 (en) 1991-09-04
EP0445051B1 EP0445051B1 (en) 1993-09-08

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EP91420067A Expired - Lifetime EP0445051B1 (en) 1990-02-28 1991-02-27 Hydraulic clamping device

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EP (1) EP0445051B1 (en)
AT (1) ATE94109T1 (en)
DE (1) DE69100338T2 (en)
ES (1) ES2046029T3 (en)
FR (1) FR2656819B1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101585172B (en) * 2009-04-20 2011-05-25 无锡烨隆精密机械有限公司 Multi-tooth rod clamp for case processing
CN111571273A (en) * 2020-06-02 2020-08-25 朱洁怡 Piston circumferential surface processing and fixing device utilizing connecting rod motion principle

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1552707A1 (en) * 1966-03-02 1970-07-02 Volk Geb Knaebler Clamping element in which the clamping force is generated by a pressure medium
GB1320237A (en) * 1970-12-01 1973-06-13 Franklin Ltd Spencer Work-holding devices
DE3318434A1 (en) * 1983-05-20 1984-11-22 AIOI Seiki K.K., Itami, Hyogo Clamping device
DE3431652A1 (en) * 1984-08-29 1986-03-13 Hans 4320 Hattingen Schoen Hydraulic tool clamp
DD248317A1 (en) * 1984-12-08 1987-08-05 Umform & Plastverarb Fz DEVICE FOR CLAMPING TOOLS OR TOOL CARRIERS TO REPRESENTING
DE3733676A1 (en) * 1987-10-05 1989-04-20 Roemheld A Gmbh & Co Kg Hydraulic clamping element

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1552707A1 (en) * 1966-03-02 1970-07-02 Volk Geb Knaebler Clamping element in which the clamping force is generated by a pressure medium
GB1320237A (en) * 1970-12-01 1973-06-13 Franklin Ltd Spencer Work-holding devices
DE3318434A1 (en) * 1983-05-20 1984-11-22 AIOI Seiki K.K., Itami, Hyogo Clamping device
DE3431652A1 (en) * 1984-08-29 1986-03-13 Hans 4320 Hattingen Schoen Hydraulic tool clamp
DD248317A1 (en) * 1984-12-08 1987-08-05 Umform & Plastverarb Fz DEVICE FOR CLAMPING TOOLS OR TOOL CARRIERS TO REPRESENTING
DE3733676A1 (en) * 1987-10-05 1989-04-20 Roemheld A Gmbh & Co Kg Hydraulic clamping element

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101585172B (en) * 2009-04-20 2011-05-25 无锡烨隆精密机械有限公司 Multi-tooth rod clamp for case processing
CN111571273A (en) * 2020-06-02 2020-08-25 朱洁怡 Piston circumferential surface processing and fixing device utilizing connecting rod motion principle

Also Published As

Publication number Publication date
FR2656819A1 (en) 1991-07-12
DE69100338T2 (en) 1994-03-10
ATE94109T1 (en) 1993-09-15
EP0445051B1 (en) 1993-09-08
ES2046029T3 (en) 1994-01-16
FR2656819B1 (en) 1992-10-23
DE69100338D1 (en) 1993-10-14

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