EP0754506A2 - Druckluftsystem für Ein- und Ausspannvorrichtung von Gesimsbiegewerkzeugen - Google Patents

Druckluftsystem für Ein- und Ausspannvorrichtung von Gesimsbiegewerkzeugen Download PDF

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Publication number
EP0754506A2
EP0754506A2 EP96201947A EP96201947A EP0754506A2 EP 0754506 A2 EP0754506 A2 EP 0754506A2 EP 96201947 A EP96201947 A EP 96201947A EP 96201947 A EP96201947 A EP 96201947A EP 0754506 A2 EP0754506 A2 EP 0754506A2
Authority
EP
European Patent Office
Prior art keywords
extensions
compressed air
clamping
jaws
running
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
EP96201947A
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English (en)
French (fr)
Other versions
EP0754506B1 (de
EP0754506A3 (de
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
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ABIEMME Srl
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 ABIEMME Srl filed Critical ABIEMME Srl
Publication of EP0754506A2 publication Critical patent/EP0754506A2/de
Publication of EP0754506A3 publication Critical patent/EP0754506A3/xx
Application granted granted Critical
Publication of EP0754506B1 publication Critical patent/EP0754506B1/de
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
    • 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

Definitions

  • the present invention relates to a compressed air clamping and unclamping system for cornice brake tools.
  • presses For cold working by bending of sheet metal pieces, presses, termed 'cornice brakes', using pairs of appropriately shaped tools (punches and dies) are commonly used. In these machines the various processing phases require frequent operations of replacement or lateral shifting of the tools. These operations are usually performed either by entirely manual procedures requiring long pauses for loosening and then clamping of numerous modular unit bolts for clamping the tools or by clamping and loosening systems for the modular units with hydraulic control. These hydraulic control systems, if on the one hand they allow significantly shortened times for replacement and moving of the tools, on the other hand they display some shortcomings among which are:
  • the Object of the present invention is to realize a system for fastening cornicebrake tools free of the above mentioned shortcomings.
  • the compressed air system in accordance with the present invention for clamping and unclamping the tools of cornice brakes relates to brakes in which are present rows of punches, dies and modular units constituting extensions of punches, clamping jaws for punches and extensions, and is characterized in that:
  • FIG 1 shows diagramatically a front view of a cornice brake of known type with entirely manual tool clamping and loosening procedure.
  • the various component parts thereof are as follows:
  • FIG 2 shows diagramatically but in enlarged scale and in greater detail a pair of punch and die tools of FIG 1 in a cross section along plane of cut AA of FIG 1.
  • the punch and die profiles are shaped for bending a metal sheet 14 into box form. Indeed, the figure shows how the cross section of the sheet 14 appears at the end of the last of four bending steps with the plunger 4 in the lower end of travel position.
  • FIGS 3 to 9 show an embodiment of the compressed air system for clamping tools in accordance with the present invention.
  • the reference numbers for the punches, dies, plunger and die supporting bar are the same as those of FIGS 1 and 2.
  • the clamping system in accordance with the present invention displays the following principal similarities and differences which are discussed in greater detail with reference to the above mentioned FIGS 3 through 9, as follows:
  • FIG 7 shows in its upper part a cross section of two modules of FIG 3 along plane of cut BB of FIG 3.
  • the above mentioned figures show that the clamping jaw 8'' of the extension 3'' has two bolts 9 and 9'' which, to achieve clamping, are placed under tension not by tightening the bolts (as in manual control systems) but by operation of a compressed air cylinder actuator A8 of which 10 indicates the piston, 25 the piston seal and 12 the cylinder chamber side wall.
  • the cylinder chamber side wall runs along the edge of the jaw 8'' and is fastened thereto by four bolts 21.
  • the piston 10 seen from the front has a rounded rectangular shape at the minor sides and is traversed by two bolts 9 and 9'' screwed on to the head of the plunger 4 and acting as rods for the piston.
  • the compressed air cylinder chamber A8 at the moment of clamping is supplied with pressurized gas (air) through a cylindrical duct 14' passing along the plate constituting the jaw 8'' and in communication with the cylinder chamber through the hole 13. Since the vertical cross section of the cylinder chamber A8 involves a large part of the surface of the jaw 8'' it is understandable that relatively low pressures (e.g. 6 atm) of the pressurized gas are sufficient to achieve effective clamping.
  • the row of modular units constituting the extension clamping jaws 8 consists of a succession of such modules located substantially sidebyside.
  • Supply of pressurized gas to the chambers of the associated compressed air cylinders takes place not independently module by module but serially. This means with one input in one or both of the modules placed at the ends of the row and with a gas supply passage from one module to the next through tube unions inserted in part in the outlet ends of the duct 14' of a module and in part in the input end of the duct 14' of the next module.
  • FIG 8 shows an embodiment of the pressurized gas supply input in the jaw located at the left end of the jaw row 8.
  • FIG 9 shows an embodiment of the pressurized gas supply passage from one module to the next with a metal connecting tube 94 partly inserted in the end 95 of the pressurized gas duct in a module (e.g. duct 14' of FIG 7).
  • the figure shows only the inlet of the tube in the right-hand module.
  • a specular representation also applies for the left hand module tube inlet.
  • FIGS 3, 4 and 7 The embodiment peculiarities of the extensions and punch spigot clamping jaws are shown in FIGS 3, 4 and 7.
  • FIG 7 the meanings of the parts associated with an extension 3'' and a clamping jaw 6'' are as follows:
  • FIG 4 shows in addition the construction details of the actuators of the jaw 6 and of the supply system thereof.
  • FIG 4 and FIG 7 show that the form of the piston and chamber of the actuators for the jaws 6 (e.g. piston 17 of the actuator A6 of FIG 7) is similar to that of the pistons and chamber of the actuators for the jaw 8.
  • the piston seen from the front has a rounded rectangular shape at the minor sides and is traversed by two bolts acting as piston rods with the tip of each bolt screwed into the piston and the body traversing the two plates of the extension and the head inserted in a cavity of the jaw as shown in the example of FIG 7 (bolt 7).
  • the cylinder chamber side wall runs near the edges of the lower plate of the extension and is fixed thereto by four bolts located at the four corners of the wall.
  • Supply of the actuators of the jaw 6 is also quite similar to that of the jaw 8 excepting a few differences. Indeed, the supply inlet on the left (and/or right) end of the module row and the supply passage from one module to the next are still as in FIGS 8 and 9 with the difference that in this case the inlets are for an extension.
  • a total length of the tube 94 approximately double that shown in FIG 9 is sufficient (the modules being near one another), in the case in question the tube 94 is longer, as shown in FIG 4.
  • FIGS 5 and 6 show an embodiment of the die clamping system in accordance with the present invention while the lower part of FIG 7 shows a cross section view of this system along plane of cut CC of the above mentioned FIGS.
  • the meaning of the various parts is as follows:
  • FIGS 10a, 10b and 10c show another embodiment of the extension and of the lower compressed air cylinder actuator (for clamping the punch spigot). This is useful if it is desired to allow a double option of installation of the punch in the press, i.e. the option of installing the punch of FIG 7 with the concave surface facing right (as in FIG 7) or with the concave surface facing left.
  • FIG 10a is a cross section view through the axis of one of the two bolts 71 acting as the compressed air cylinder piston rods.
  • FIG 10b is a cross section view of the lower actuator through the axis of the duct 72 for supply of the cylinder chamber and through the axis of a spring 73 for release of the right-hand jaw.
  • FIG 10c is a cross section view of the actuator through the axis of a bolt 74 for seal of the righthand jaw and through the axis of a spring 75 for release of the lefthand jaw.
  • the release springs command withdrawal of the jaws from the surfaces on which they were clamped so as to allow punch changing or moving.
  • These tubes can be constructed advantageously of stainless steel or chromiumplated iron so as to avoid oxidation of their outer surface and thus ensure lasting seal of the seals on which they run.
EP96201947A 1995-07-17 1996-07-11 Presse mit Druckluftsystem für Ein- und Ausspannvorrichtung von Gesimsbiegewerkzeugen Expired - Lifetime EP0754506B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI951546 1995-07-17
ITMI951546A IT1275562B (it) 1995-07-17 1995-07-17 Sistema pneumatico per bloccare/sbloccare gli utensili di presse piegatrici

Publications (3)

Publication Number Publication Date
EP0754506A2 true EP0754506A2 (de) 1997-01-22
EP0754506A3 EP0754506A3 (de) 1997-02-05
EP0754506B1 EP0754506B1 (de) 2000-10-11

Family

ID=11371997

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96201947A Expired - Lifetime EP0754506B1 (de) 1995-07-17 1996-07-11 Presse mit Druckluftsystem für Ein- und Ausspannvorrichtung von Gesimsbiegewerkzeugen

Country Status (5)

Country Link
EP (1) EP0754506B1 (de)
AT (1) ATE196863T1 (de)
DE (1) DE69610593T2 (de)
ES (1) ES2150629T3 (de)
IT (1) IT1275562B (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999001240A1 (en) * 1997-07-01 1999-01-14 Wilson Tool International, Inc. Press brake tool holder
EP0934782A2 (de) * 1998-01-28 1999-08-11 Tecnostamp Srl Getriebevorrichtung der Klemmbacken in Umformpressen
EP1155757A2 (de) * 2000-05-16 2001-11-21 ABIEMME S.r.L. Pneumatisches Steuersystem zum Schnellspannen von Gesimsbiegewerkzeugen
WO2002092253A2 (en) * 2001-05-11 2002-11-21 Wilson Tool International, Inc. Press brake assemblies, tool holder apparatuses, and components thereof
CN105728507A (zh) * 2016-05-09 2016-07-06 贵州瓮安伦祥机械设备有限公司 液压式板料折弯机
CN106424233A (zh) * 2016-06-30 2017-02-22 无锡前洲兴华机械有限公司 一种固定牢靠的折弯机
CN106881404A (zh) * 2017-04-25 2017-06-23 上海葛世工业自动化有限公司 夹块装置及折弯机
EP3210684A1 (de) * 2016-02-24 2017-08-30 Gasparini Industries S.r.l. Mit verbesserten pneumatischen gleitenden zwischenelementen ausgestattete obere querträger einer abkantpresse und zugehörige abkantpresse, die mit der besagten oberen querträger ausgestattet ist

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2339485A1 (fr) * 1976-01-27 1977-08-26 Colly Pierre Moyen de fixation amovible pour porte-outil de presse-plieuse et similaire
GB2057047A (en) * 1979-08-01 1981-03-25 Haemmerle Ag Maschf Clamping device for fastening a tool to a tool holder
US4612796A (en) * 1984-03-15 1986-09-23 Cincinnati Incorporated Hydraulically actuated tooling clamps for the ram and bed of a press brake and the like
FR2609909A1 (fr) * 1987-01-28 1988-07-29 Norlander Goran Dispositif serre-outil pour presse plieuse
EP0446810A1 (de) * 1990-03-12 1991-09-18 Kabushiki Kaisha Kosmek Spannvorrichtung für Abkantpresse

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2339485A1 (fr) * 1976-01-27 1977-08-26 Colly Pierre Moyen de fixation amovible pour porte-outil de presse-plieuse et similaire
GB2057047A (en) * 1979-08-01 1981-03-25 Haemmerle Ag Maschf Clamping device for fastening a tool to a tool holder
US4612796A (en) * 1984-03-15 1986-09-23 Cincinnati Incorporated Hydraulically actuated tooling clamps for the ram and bed of a press brake and the like
FR2609909A1 (fr) * 1987-01-28 1988-07-29 Norlander Goran Dispositif serre-outil pour presse plieuse
EP0446810A1 (de) * 1990-03-12 1991-09-18 Kabushiki Kaisha Kosmek Spannvorrichtung für Abkantpresse

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6003360A (en) * 1997-07-01 1999-12-21 Wilson Tool International, Inc. Press brake tool holder
AU746570B2 (en) * 1997-07-01 2002-05-02 Wilson Tool International, Inc. Press brake tool holder
WO1999001240A1 (en) * 1997-07-01 1999-01-14 Wilson Tool International, Inc. Press brake tool holder
EP0934782A3 (de) * 1998-01-28 2003-01-08 Tecnostamp Srl Getriebevorrichtung der Klemmbacken in Umformpressen
EP0934782A2 (de) * 1998-01-28 1999-08-11 Tecnostamp Srl Getriebevorrichtung der Klemmbacken in Umformpressen
EP1155757A2 (de) * 2000-05-16 2001-11-21 ABIEMME S.r.L. Pneumatisches Steuersystem zum Schnellspannen von Gesimsbiegewerkzeugen
EP1155757A3 (de) * 2000-05-16 2002-10-09 ABIEMME S.r.L. Pneumatisches Steuersystem zum Schnellspannen von Gesimsbiegewerkzeugen
WO2002092253A2 (en) * 2001-05-11 2002-11-21 Wilson Tool International, Inc. Press brake assemblies, tool holder apparatuses, and components thereof
US6557390B2 (en) 2001-05-11 2003-05-06 Wilson Tool International, Inc. Press brake assemblies, tool holder apparatuses, and components thereof
WO2002092253A3 (en) * 2001-05-11 2009-09-11 Wilson Tool International, Inc. Press brake assemblies, tool holder apparatuses, and components thereof
EP3210684A1 (de) * 2016-02-24 2017-08-30 Gasparini Industries S.r.l. Mit verbesserten pneumatischen gleitenden zwischenelementen ausgestattete obere querträger einer abkantpresse und zugehörige abkantpresse, die mit der besagten oberen querträger ausgestattet ist
CN105728507A (zh) * 2016-05-09 2016-07-06 贵州瓮安伦祥机械设备有限公司 液压式板料折弯机
CN106424233A (zh) * 2016-06-30 2017-02-22 无锡前洲兴华机械有限公司 一种固定牢靠的折弯机
CN106881404A (zh) * 2017-04-25 2017-06-23 上海葛世工业自动化有限公司 夹块装置及折弯机

Also Published As

Publication number Publication date
DE69610593T2 (de) 2001-05-31
ITMI951546A0 (it) 1995-07-17
ATE196863T1 (de) 2000-10-15
DE69610593D1 (de) 2000-11-16
ITMI951546A1 (it) 1997-01-17
EP0754506B1 (de) 2000-10-11
IT1275562B (it) 1997-08-07
ES2150629T3 (es) 2000-12-01
EP0754506A3 (de) 1997-02-05

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