EP0256245A2 - Porte-outil pour une machine à plier ou analogue - Google Patents

Porte-outil pour une machine à plier ou analogue Download PDF

Info

Publication number
EP0256245A2
EP0256245A2 EP87108596A EP87108596A EP0256245A2 EP 0256245 A2 EP0256245 A2 EP 0256245A2 EP 87108596 A EP87108596 A EP 87108596A EP 87108596 A EP87108596 A EP 87108596A EP 0256245 A2 EP0256245 A2 EP 0256245A2
Authority
EP
European Patent Office
Prior art keywords
tool
piece
groove
tool holder
holding element
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
EP87108596A
Other languages
German (de)
English (en)
Other versions
EP0256245B1 (fr
EP0256245A3 (en
Inventor
Heinz Fetsch
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.)
Eisen- und Hammerwerk GmbH
Original Assignee
Eisen- und Hammerwerk GmbH
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 Eisen- und Hammerwerk GmbH filed Critical Eisen- und Hammerwerk GmbH
Priority to AT87108596T priority Critical patent/ATE55929T1/de
Publication of EP0256245A2 publication Critical patent/EP0256245A2/fr
Publication of EP0256245A3 publication Critical patent/EP0256245A3/de
Application granted granted Critical
Publication of EP0256245B1 publication Critical patent/EP0256245B1/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
    • 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 invention relates to a tool holder for the releasable attachment of a tool - preferably consisting of several aligned pieces - in particular for a die press or the like.
  • the tool pieces in the tool holder by a pressing device z. B. by means of pressure piece or the like. in particular can be pressed pneumatically or hydraulically and can be mechanically secured by at least one holding element which engages in a groove or the like. Recess of the tool or tool piece.
  • Such a tool holder is already known from DE-OS 31.36 440.
  • a working cylinder acts on a rocker which, at its end opposite the cylinder at the rocker bearing, has the pressing point for the tool.
  • a spring-loaded locking pin is also provided, which is pressed into a lateral groove of the tool by the pressure of the spring and causes mechanical locking of the tool even when the cylinder is depressurized. This spring-loaded pin is withdrawn to release the tool.
  • the clamping or pressing device In order to be able to integrate this safety pin into the tool holder, the clamping or pressing device must be designed as a rocker, which is complex and requires a relatively large amount of space. In addition, it is essential to loosen the pin also the jaw of the pressing device or the rocker can be withdrawn.
  • the solution to this problem essentially consists in that the holding element or the like - for mechanically securing the tool piece - on the tool or tool piece on the opposite side of the pressure piece and thus on the pressing device and is arranged independently of it.
  • the pressing device can be designed to be much simpler and act directly on the tool piece, so it does not have to be a relatively large rocker.
  • the holding element used for mechanical securing can namely be actuated completely independently of the pressure piece of the pressing device, because it acts on the opposite side of the tool.
  • this holding element can also be designed and constructed much better for its securing task and for simple and quick operability.
  • the holding element has a transverse to the tool piece and its preferably laterally arranged groove and in its longitudinal extension preferably against the force of a spring retractable pull pin or the like.
  • This pull pin can be freely accessible regardless of a rocker or the like, or the like further design options for simplified operation allowed.
  • the holding element can be a last piece which can be withdrawn against at least two parallel springs parallel to itself by means of the pull pin against the force of the springs from the area of the groove or the like. Recess of the tool piece and whose width is equal to or less than the width of the groove of the tool piece.
  • the securing of the tool or the tool piece is not only dependent on the relatively small dimension of the pin, but an improved safety is achieved by a strip piece.
  • a rotary handle or the like engages on the holding element on its pull pin, which acts upon a bevel or the like leading away from the tool piece during its rotation, the height of this bevel at least the disengagement path of the Holding element corresponds.
  • the user only needs to turn a turning handle to unlock the mechanical lock, which means that it is lifted from its original position due to the inclined surface and lifts the strip piece out of the groove against the force of the springs via the traction pin.
  • Such a rotary movement on a sufficiently large rotary handle is much easier to carry out than when a spring-loaded pin has to be pulled. In any case, it is avoided that the actual pressing device or its pressure piece itself has to be withdrawn for lifting the pin and moved away from the tool holder.
  • At least one inclined surface is provided to delimit a groove-like groove for receiving a projection or the like projecting on the side of the rotary handle facing the tool piece, this projection being held Position is arranged in this trough and movable by rotating the handle over the inclined surface and the groove edge and thereby together with the twist grip and the pull pin or the like. Movable away from the tool piece, so that the holding element is disengaged from the groove.
  • the protrusion (s) on the underside of the rotary handle facing the tool piece are rotatably mounted rolling elements, preferably balls, which can be mounted in a recess or the like of the rotary handle, which can hold the ball or the like.
  • Rolling bodies preferably comprises at least about half about. This reduces the friction and thus the force to be exerted when the rotary handle is actuated, in particular to disengage the mechanical lock.
  • a particularly advantageous and inexpensive embodiment of the invention for the operation and the power distribution can consist in the fact that the twist grip has a ball or the like on each side of the traction pin emanating from it, both balls or the like in the holding position of the holding element in the continuous channel, and that the channel is delimited and formed by two preferably symmetrical inclined surfaces.
  • the two balls are moved over the inclined surfaces that rise away from one another over the edge region of the groove, whereby the twist grip is simultaneously raised from its original position and the pull pin with the holding element is thus withdrawn.
  • the turning handle is a rod-shaped gripping piece extended in the direction of the ball receptacles and all turning handles in the holding position are coincident, preferably aligned with one another with their longitudinal extent and running parallel to the locking groove and the groove in the tool. This makes it immediately apparent from the outside whether all the handles are in the safety position or in the release position.
  • the surfaces arranged diagonally in opposite directions to limit the locking groove enclose an obtuse angle in cross section.
  • the pull pin can be rotatably mounted on the rotary handle and / or the holding element in order to make the relative rotation of the rotary handle as smooth as possible with respect to the strip-shaped holding element.
  • a combination of the features and measures described above results in a tool holder in which the hydraulic or pneumatic pressure can be constructed in a simple and space-saving manner because it does not have to take into account the additional mechanical securing. This results in a low construction effort with few parts subject to wear. Since at the same time a flat design of the contact pressure direction is possible, there is only a very slight impairment due to this contact pressure device during the bending work. Operation is simple and can be done independently of the different instep devices are carried out, which at the same time advantageously results in an optical control for the open or closed position, in particular of the mechanical safety devices.
  • a tool holder designated as a whole by 1, is used for the detachable fastening of a tool, preferably consisting of a plurality of pieces aligned with one another, for a die bending press.
  • a tool piece 2 can be seen, which can be fixed in the tool holder 1 by means of a pneumatic or hydraulic pressure device, generally designated 3, via a pressure piece 4.
  • the pressure piece 4 is acted upon by a piston 5 strikes, the cylinder chamber 6 has a corresponding supply line 7 for the pressure medium. It is thereby clear that it is sufficient to depressurize the cylinder space 6 in order to eliminate the force emanating from the pressure piece 4 and to be able to replace the tool piece 2.
  • the tool piece 2 is mechanically secured in its position of use by at least one holding element 9 which engages in a groove 8 of the tool or of the tool piece 2. This mechanical lock must therefore be released when changing tools.
  • Fig. 1 it can be seen that the holding element 9 on the tool or the tool piece 2 on the opposite side of the pressure piece 4 and thus facing away from the pressing device 3 and is arranged independently of this.
  • the pressing device 3 can function practically without a path or with very little play, that is to say that no large strokes of the piston 5 are required.
  • the holding element 9 has a traction pin 11 which extends transversely to the tool piece 2 and its laterally arranged groove 8 and is retractable in its longitudinal extension against the force of a spring 10.
  • the holding element 9 is a strip piece, which against two parallel springs 10 parallel to itself by means of the pull pin 11 from the area the groove 8 of the tool piece 2 is retractable.
  • the width of this holding element 9 is approximately equal to that. Width of the groove 8 of the tool piece 2, so it fills almost completely according to FIG. 1.
  • a twist grip 12 which, when rotated from the position shown in FIG. 1 with solid lines, into the dash-dotted position, that is to say preferably by 90 °, leads away from the tool piece 2 in the following Schräg_ to be described in more detail below, the height difference overcome by this bevel at least corresponding to the disengagement path of the holding element 9.
  • the bevel is provided as an inclined surface 13 and thereby as a boundary of a groove-like groove 14 for receiving a projection 16 projecting on the side 15 of the rotary handle 12 facing the tool piece 2.
  • the projection 16 is arranged according to FIGS. 1 and 2 in the holding position in this channel 14. By turning the rotary handle 12, the projection 16 is now moved over the inclined surface 13 and the groove edge 17 and thereby moved away from the tool piece 2 together with the rotary handle 12 and the pull pin 11.
  • the inclined surfaces 13 and the groove-shaped groove 14 are arranged on the machine abutment part 18 for the tool piece 2 to be clamped in on the side thereof facing away from the tool piece 2.
  • the protrusions 16 projecting on the underside 15 of the rotary handle 12 facing the tool piece 2 are balls which are rotatably mounted within the rotary handle 12, but which could also be other rolling elements in order to resist the rotation especially when disengaging the holding element 9.
  • these spheres are mounted of the turning handle 12 in a recess 1 9, this recess 19 comprises according to FIG. 2, at least about half of a ball 16.
  • a plurality of holding elements 9, each with a twist grip 12 can be provided side by side.
  • the twist grip 12 is an extended rod-shaped gripping piece and, according to FIG. 3, all twist grips 12 in the holding position are coincident, in alignment with one another and parallel to the locking groove 14 and the groove 8 in the tool 2. 3 clearly shows that the securing position of the holding elements 9 is immediately recognizable from the outside. If one of the twist grips 12 were twisted and thus the holding element 9 belonging to it was not in the securing position, this twist grip 12 would be transverse to the others.
  • Fig. 1 it can still be seen that the oppositely inclined surfaces 13 to limit the locking groove 14th include an obtuse angle in cross section to achieve a relatively uniform and gradual lifting of the holding elements 9 when turning the twist grip and when tensioning the springs 10, but at the same time to have a good locking position in the securing position shown in FIG. 2.
  • the pull pin 11 is rotatably and axially immovably mounted in a recess 21 of the holding element 9 by means of a collar 20 in order to enable the turning of the turning handle relative to the holding element 9 in a simple manner and also to exert the desired pulling force via the pull pin 11 to allow.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)
  • Automatic Tool Replacement In Machine Tools (AREA)
  • Jigs For Machine Tools (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
EP87108596A 1986-08-12 1987-06-15 Porte-outil pour une machine à plier ou analogue Expired - Lifetime EP0256245B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87108596T ATE55929T1 (de) 1986-08-12 1987-06-15 Werkzeughalter fuer eine gesenkbiegepresse od.dgl.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8621639U 1986-08-12
DE8621639U DE8621639U1 (de) 1986-08-12 1986-08-12 Werkzeughalter insbesondere für eine Gesenkbiegepresse od.dgl.

Publications (3)

Publication Number Publication Date
EP0256245A2 true EP0256245A2 (fr) 1988-02-24
EP0256245A3 EP0256245A3 (en) 1988-05-25
EP0256245B1 EP0256245B1 (fr) 1990-08-29

Family

ID=6797361

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87108596A Expired - Lifetime EP0256245B1 (fr) 1986-08-12 1987-06-15 Porte-outil pour une machine à plier ou analogue

Country Status (3)

Country Link
EP (1) EP0256245B1 (fr)
AT (1) ATE55929T1 (fr)
DE (2) DE8621639U1 (fr)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1989010807A1 (fr) * 1988-05-05 1989-11-16 Macgregor Donald C Presse plieuse de precision
US5065610A (en) * 1990-03-12 1991-11-19 Kabushiki Kaisha Kosmek Clamping apparatus for press brake
US5067340A (en) * 1988-05-05 1991-11-26 Macgregor Donald C Precision press brake
EP0494714A1 (fr) * 1991-01-10 1992-07-15 Machinefabriek Wila B.V. Outil de pressage et adaptateur et presse destinés à celui-ci
EP0779116A1 (fr) * 1995-12-15 1997-06-18 Amada GmbH Dispositif de fixation rapide pour au moins un outil d'une machine-outil
WO2000059655A1 (fr) * 1999-04-07 2000-10-12 Toolspress S.R.L. Fixation de porte-outil pour presses a cintrer
NL1011833C2 (nl) * 1999-04-20 2000-10-23 Machf Wila B V Kantpersopname voor een kantpersgereedschap, een paslijst voorzien van een dergelijke kantpersopname.
FR2818189A1 (fr) * 2000-12-18 2002-06-21 Amada Europ Sa Porte-outil associe a une presse plieuse
US6467327B1 (en) 2001-08-15 2002-10-22 Wilson Tool International, Inc. Press brake tool and tool holder
US6928852B2 (en) 2003-03-31 2005-08-16 Wila B.V. Combination of a press brake clamping system and at least a press brake tool
US7004008B2 (en) 2003-07-01 2006-02-28 Wilson Tool International, Inc. Press brake tool having lockable safety key
US7021116B2 (en) 2003-12-19 2006-04-04 Wilson Tool International, Inc. Press brake tooling technology
US7661288B2 (en) 2003-07-01 2010-02-16 Wilson Tool International Inc. Press brake tool safety key assemblies
US7721586B2 (en) 2005-02-08 2010-05-25 Wilson Tool International Inc. Press brake tool seating technology

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT364589B (de) * 1979-08-01 1981-10-27 Haemmerle Ag Spannvorrichtung zur befestigung eines werkzeuges an einem werkzeughalter
DE3136440A1 (de) * 1981-09-14 1983-03-31 Paul Weinbrenner Maschinenbau GmbH + Co KG, 7252 Weil der Stadt Spannvorrichtung zum spannen von werkzeugen
DE3347529A1 (de) * 1983-12-30 1985-07-11 Eisen- Und Hammerwerk Gmbh, 7835 Teningen Werkzeughalter insbesondere fuer eine gesenkbiegepresse
DE3524694A1 (de) * 1985-07-11 1987-01-22 Hilma Gmbh Maschf Spannvorrichtung fuer oberwerkzeuge in abkantpressen

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1989010807A1 (fr) * 1988-05-05 1989-11-16 Macgregor Donald C Presse plieuse de precision
US5067340A (en) * 1988-05-05 1991-11-26 Macgregor Donald C Precision press brake
US5065610A (en) * 1990-03-12 1991-11-19 Kabushiki Kaisha Kosmek Clamping apparatus for press brake
EP0494714A1 (fr) * 1991-01-10 1992-07-15 Machinefabriek Wila B.V. Outil de pressage et adaptateur et presse destinés à celui-ci
US5245854A (en) * 1991-01-10 1993-09-21 Mechinefabriek Wila B.V. Press tool and an adaptor and a press therefor
EP0779116A1 (fr) * 1995-12-15 1997-06-18 Amada GmbH Dispositif de fixation rapide pour au moins un outil d'une machine-outil
WO2000059655A1 (fr) * 1999-04-07 2000-10-12 Toolspress S.R.L. Fixation de porte-outil pour presses a cintrer
NL1011833C2 (nl) * 1999-04-20 2000-10-23 Machf Wila B V Kantpersopname voor een kantpersgereedschap, een paslijst voorzien van een dergelijke kantpersopname.
FR2818189A1 (fr) * 2000-12-18 2002-06-21 Amada Europ Sa Porte-outil associe a une presse plieuse
US6467327B1 (en) 2001-08-15 2002-10-22 Wilson Tool International, Inc. Press brake tool and tool holder
US6732564B2 (en) 2001-08-15 2004-05-11 Wila B.V. Press brake tool and tool holder
US6928852B2 (en) 2003-03-31 2005-08-16 Wila B.V. Combination of a press brake clamping system and at least a press brake tool
US7004008B2 (en) 2003-07-01 2006-02-28 Wilson Tool International, Inc. Press brake tool having lockable safety key
US7661288B2 (en) 2003-07-01 2010-02-16 Wilson Tool International Inc. Press brake tool safety key assemblies
US7021116B2 (en) 2003-12-19 2006-04-04 Wilson Tool International, Inc. Press brake tooling technology
US7721586B2 (en) 2005-02-08 2010-05-25 Wilson Tool International Inc. Press brake tool seating technology

Also Published As

Publication number Publication date
EP0256245B1 (fr) 1990-08-29
DE8621639U1 (de) 1986-10-02
ATE55929T1 (de) 1990-09-15
EP0256245A3 (en) 1988-05-25
DE3764580D1 (de) 1990-10-04

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