EP1155757B1 - Corniche avec système de commande pneumatique pour le serrage rapide des outils de pliage pour corniche - Google Patents

Corniche avec système de commande pneumatique pour le serrage rapide des outils de pliage pour corniche Download PDF

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Publication number
EP1155757B1
EP1155757B1 EP01201783A EP01201783A EP1155757B1 EP 1155757 B1 EP1155757 B1 EP 1155757B1 EP 01201783 A EP01201783 A EP 01201783A EP 01201783 A EP01201783 A EP 01201783A EP 1155757 B1 EP1155757 B1 EP 1155757B1
Authority
EP
European Patent Office
Prior art keywords
clamping
intermediates
jaw
cornice
brake
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP01201783A
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German (de)
English (en)
Other versions
EP1155757A3 (fr
EP1155757A2 (fr
Inventor
Giuseppe Vittorio Gianelli
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.)
ABIEMME Srl
Original Assignee
ABIEMME Srl
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Filing date
Publication date
Application filed by ABIEMME Srl filed Critical ABIEMME Srl
Publication of EP1155757A2 publication Critical patent/EP1155757A2/fr
Publication of EP1155757A3 publication Critical patent/EP1155757A3/fr
Application granted granted Critical
Publication of EP1155757B1 publication Critical patent/EP1155757B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • B21D5/0209—Tools therefor
    • B21D5/0236—Tool clamping
    • 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
    • B21D5/0209—Tools therefor

Definitions

  • the present invention relates to a cornice brake with a pneumatic control system for quick clamping, release, withdrawal and change of cornice brake tools.
  • presses termed “cornice brakes” or even “press brakes” using appropriately shaped pairs of tools (punches and dies) are commonly used.
  • the various processing steps require frequent replacement or lateral shifting of the tools.
  • These operations are usually performed either by completely manual procedures which require long pauses for loosening and then clamping of numerous modular unit bolts for clamping the tools, or with the aid of clamping and unclamping systems for the modular units with automatic hydraulic or pneumatic control.
  • the clamping device comprises a vertical channel which receives fluid under pressure by a fluid supply horizontal channel, and supplies the same fluid to a pneumatic/hydraulic cylinder punch clamping unit.
  • the vertical channel includes a valve designed to intercept the flow of fluid into a channel which directly leads to the cylinder.
  • Any tool must have a tang with a particular cavity which consent the removal of the tool only when a pin which controls the closing and opening of the valve is in closing position, realizing in this way an additional lock of the tool.
  • the valve consents to individually clamp/unclamp a tool without influencing the clamping /unclamping status of the other tools.
  • the general purpose of the present invention is to produce a cornice brake with a pneumatic control system for quick tool clamping which would not require tubes for supply of fluid under pressure running between the intermediates and which would allow quick removal of the intermediates.
  • Another purpose of the system is to allow installation of punches not requiring intermediates or installation of intermediates for manual clamping the punch tang on the intermediate.
  • the present invention relates to a cornice brake with a pneumatic control system for quick clamping of tools in which there are rows of punches and dies and modular units consisting of intermediates and clamping jaws for the intermediates and jaws for clamping punches, with the latter being operated by actuators driven by pneumatic cylinders, characterized in that:
  • FIGS 1, 2 and 3 relate to a known quick tool clamping and unclamping system with pneumatic control of the type described in the above mentioned documents.
  • FIG 2 (corresponding to FIG 4 of the above mentioned Italian patent application no. MI98A001084) shows a cross section of the pneumatic punch clamping system of FIG 1.
  • the fluid under pressure for example air
  • the piston 11 of the pneumatic cylinder moves towards the right and cause clamping of the jaw 6' against the tang of the punch 2'.
  • FIG 3 shows the case in which the press of FIG 1 requires removal of a punch (the center one in the FIG) and associated intermediate to allow special bending. In this event it is necessary to remove, together with the middle intermediate, the two tubes supplying fluid under pressure and connecting the intermediate to those beside it and then replace the two tubes with a single tube 12 to restore the connection of the intermediates 3' and 3".
  • FIGS 4, 5 and 6 show a pneumatic system for quick clamping and unclamping, withdrawal and change of tools in accordance with the present invention.
  • This system displays the following main features:
  • the system used for supplying fluid under pressure in the channel 16 calls for a serial supply of the clamping jaws 14 of the intermediates through tubes 23 connecting together each side-by-side pair of jaws.
  • This type of supply is not binding however because a non-serial but independent supply for the channel 16 of each jaw can be provided in a quite obvious manner.
  • FIG reference number 24 designates the holes in which are inserted the screws 24' for clamping the jaw
  • 25 designates two holes in which springs tending to withdraw the jaw from the cursor 5 are housed.
  • FIGS 5 and 5a (the latter showing an enlarged view of the part of FIG 5 involved with the straight groove 21) also show on the internal surface of the jaw an annular groove in which is inserted a seal 26 (rubber or other similar material) designed to ensure sealing of the fluid under pressure when the jaw 14 is clamped against the intermediate.
  • a seal 26 rubber or other similar material
  • FIG 6 shows a view from the left of the intermediate 13 and the jaw 29
  • FIG 6 shows the path followed by the channel 15 for carrying fluid under pressure (entering from the hole 19) up to the chamber 27 of the pneumatic cylinder 9.
  • FIGS 7 to 9a show the usefulness of the groove 21 and two different ways of providing the valve 22 of FIG 4.
  • FIGS 7 and 7a (the latter being an enlarged view of the part of FIG 7 surrounded by a circle in broken lines) concerns an embodiment of the valve 22 of the manually operated type.
  • the valve is shown open. It comprises a cylindrical chamber 37 coaxial with the axis of the hole 20 and having a diameter greater than that of the hole. It also comprises an elastic seal ring 30 located on the bottom of the chamber and a small cylinder 31 fastened near the end of a screw 32 so as to be pressable against the ring 30 or withdrawable therefrom by screwing or unscrewing the screw.
  • FIG 7a shows the cylinder 31 spaced from the ring 30 so as to allow the discharge of the fluid under pressure from the hole 20 into the groove 21, the hole 19 and the channel 15, and the resulting clamping of the jaw 29 (FIG 4).
  • the closed condition of the valve 22 not only allows withdrawal of the intermediate but allows use of conventional intermediates (without internal channel) or punches not requiring intermediates. Indeed, in these cases the jaw 14 behaves like a conventional jaw and operation under pneumatic control of the other positions of the press is not affected because closing of the hole 20 prevents falling of the fluid pressure.
  • FIGS 8 and 8a show a second version of the valve 32 and specifically a valve with automatic operation.
  • the valve is again structured like that of FIGS 7 and 7a except that the cylinder 31' is free to traverse in the chamber 37 and is pressed rightward by a spring 40.
  • the rod 41 on which the cylinder 31' is fastened has its right end which in closed position of the valve (cylinder 31' pressed by the spring against the ring 30) emerges from the hole 20, while the same end when it is brought level with the outlet edge of the hole puts the valve in open position (FIG 8a).
  • This automatic opening and closing system of the valve 22 requires use of a clever device if it is desired to use the jaw 14 for clamping conventional intermediates or punches not requiring intermediates. Indeed, in this case it is necessary to avoid operation of the valve by these tools.
  • This can be secured by providing a projection 42 near the seal 26 and a corresponding recess (step 43 of FIG 8a) in the intermediate with channel.
  • This device has the effect of allowing operation of the valve by the intermediates in accordance with the present invention and of preventing operation when conventional intermediates or punches not requiring intermediates are used. Indeed, in the latter case as illustrated in FIGS 9 and 9a the projection 42 prevents operation of the valve by the tool on which the jaw 14 is clamped and this way the valve is always in closed position.
  • Said variants could concern for example the groove 21 which could be replaced or accompanied by a similar groove located on the intermediate 13 and at the level of the hole 19. In addition this groove could be missing if lateral traversing is not provided for the intermediates.
  • cutoff valve as regards its structural features and its position not necessarily near the hole 20 or in the intermediate clamping jaw. This possibility of different position is valid in particular for the manually operated valve with independent feed of each jaw.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)

Claims (6)

  1. Presse-plieuse d'un système de commande pneumatique pour fixation rapide d'outils, dans laquelle il y a des rangées de poinçons et de matrices et des éléments modulaires consistant en pièces intermédiaires (13), mâchoires (14) pour bloquer des pièces intermédiaires et mâchoires (29) pour bloquer des poinçons, ces dernières étant actionnées par des actionneurs entraînés par des vérins pneumatiques (9), caractérisée en ce que :
    a) dans les pièces intermédiaires (13) et les mâchoires (14) qui verrouillent les pièces intermédiaires au curseur de la presse, il y a des canaux (15, 16) pour fournir du fluide sous pression au vérin actionneur (9) ;
    b) les canaux conduisent à deux trous (19, 20) ayant des orifices mutuellement opposés s'ouvrant sur des faces opposées de chaque paire de pièces intermédiaires (13) et de mâchoires de blocage associées (14) ; et
    c) dans le circuit d'alimentation de fluide sous pression vers chaque pièce intermédiaire est insérée une soupape (22) conçue pour intercepter le débit de fluide vers la pièce intermédiaire.
  2. Presse-plieuse selon la revendication 1, caractérisée en ce que, sur au moins l'une des deux surfaces opposées de chaque paire de pièces intermédiaires et de mâchoires de blocage associées, l'orifice du trou associé comprend une rainure (21) courant horizontalement dans la surface et positionnée au même niveau que le trou (19, 20) s'ouvrant sur la surface opposée.
  3. Presse-plieuse selon la revendication 2, caractérisée en ce que la rainure susmentionnée courant horizontalement est entourée d'une seconde rainure dans laquelle un joint (26) de matériau élastique est scellé, conçu pour assurer un scellement du fluide sous pression quand la pièce intermédiaire et la mâchoire de blocage associée sont fixées l'une à l'autre.
  4. Presse-plieuse selon la revendication 1 ou 2, caractérisée en ce que la soupape (22) susmentionnée est actionnée manuellement.
  5. Presse-plieuse selon la revendication 1 ou 2, caractérisée en ce que la soupape (22) susmentionnée est actionnée automatiquement et est mise en état de fermeture ou d'ouverture quand la mâchoire (14) dans laquelle elle est située est bloquée sur la pièce intermédiaire associée (13) ou respectivement décalée de celle-ci.
  6. Presse-plieuse selon la revendication 5, caractérisée en ce que, dans chaque mâchoire de blocage intermédiaire, se trouve une saillie (42) sur la surface conçue pour se fermer contre la pièce intermédiaire, conçue pour être insérée lors du blocage dans un évidement correspondant (43) de la surface opposée de la pièce intermédiaire de façon à éviter l'ouverture de la soupape susmentionnée quand la mâchoire est bloquée contre des outils ne comportant pas l'évidement susmentionné.
EP01201783A 2000-05-16 2001-05-14 Corniche avec système de commande pneumatique pour le serrage rapide des outils de pliage pour corniche Expired - Lifetime EP1155757B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2000MI001083A IT1317545B1 (it) 2000-05-16 2000-05-16 Sistema a comando pneumatico per il serraggio rapido degli utensili in presse piegatrici
ITMI001083 2000-05-16

Publications (3)

Publication Number Publication Date
EP1155757A2 EP1155757A2 (fr) 2001-11-21
EP1155757A3 EP1155757A3 (fr) 2002-10-09
EP1155757B1 true EP1155757B1 (fr) 2006-03-29

Family

ID=11445059

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01201783A Expired - Lifetime EP1155757B1 (fr) 2000-05-16 2001-05-14 Corniche avec système de commande pneumatique pour le serrage rapide des outils de pliage pour corniche

Country Status (5)

Country Link
US (1) US20020023477A1 (fr)
EP (1) EP1155757B1 (fr)
DE (1) DE60118296T2 (fr)
ES (1) ES2259003T3 (fr)
IT (1) IT1317545B1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3210684A1 (fr) 2016-02-24 2017-08-30 Gasparini Industries S.r.l. Élément transversal supérieur d'une presse plieuse équipée d'éléments de glissement intermédiaire pneumatique améliorés et presse-plieuse équipée dudit élément transversal

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7308817B2 (en) * 2005-02-08 2007-12-18 Wilson Tool International Inc. Push plate tool holder for press brakes
US7721586B2 (en) * 2005-02-08 2010-05-25 Wilson Tool International Inc. Press brake tool seating technology
CA2611564A1 (fr) * 2005-06-10 2006-12-21 Terry G. Pabich Outil de frein a pression integrant un siege et/ou un mecanisme de blocage
US7596983B2 (en) * 2005-07-11 2009-10-06 Wilson Tool International Inc. Press brake clamp incorporating tool-seating mechanism
AT510721B1 (de) * 2011-03-14 2012-06-15 Trumpf Maschinen Austria Gmbh Werkzeug-positioniervorrichtung an einer biegepresse
US9555456B2 (en) 2014-04-26 2017-01-31 Wilson Tool International Inc. Dynamic clamp and tool holders therefor
US10189067B2 (en) 2015-05-27 2019-01-29 Wilson Tool International Inc. Tool holders usable with tooling having different tang styles and/or configured with mechanically-actuated clamp assembly
US10300518B2 (en) 2015-05-27 2019-05-28 Wilson Tool International Inc. Tool holders usable with tooling having different tang styles and/or configured with mechanically-actuated clamp assembly
WO2020226084A1 (fr) * 2019-05-07 2020-11-12 株式会社アマダ Frein à pression

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI981084A1 (it) * 1998-05-18 1999-11-18 Abiemme Srl Sistema a comando fluodinamico per bloccare/sbloccare gli utensili di presse piegatrici

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3347529A1 (de) * 1983-12-30 1985-07-11 Eisen- Und Hammerwerk Gmbh, 7835 Teningen Werkzeughalter insbesondere fuer eine gesenkbiegepresse
IT1275562B (it) * 1995-07-17 1997-08-07 Giuseppe Vittorio Gianelli Sistema pneumatico per bloccare/sbloccare gli utensili di presse piegatrici

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI981084A1 (it) * 1998-05-18 1999-11-18 Abiemme Srl Sistema a comando fluodinamico per bloccare/sbloccare gli utensili di presse piegatrici

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
TEDA SALES PAMPHLET: "Quick tool change on press brakes" *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3210684A1 (fr) 2016-02-24 2017-08-30 Gasparini Industries S.r.l. Élément transversal supérieur d'une presse plieuse équipée d'éléments de glissement intermédiaire pneumatique améliorés et presse-plieuse équipée dudit élément transversal

Also Published As

Publication number Publication date
DE60118296D1 (de) 2006-05-18
ITMI20001083A1 (it) 2001-11-16
ITMI20001083A0 (it) 2000-05-16
IT1317545B1 (it) 2003-07-09
US20020023477A1 (en) 2002-02-28
EP1155757A3 (fr) 2002-10-09
DE60118296T2 (de) 2006-08-31
ES2259003T3 (es) 2006-09-16
EP1155757A2 (fr) 2001-11-21

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