EP1884298B1 - Vorrichtung zum Verriegeln eines Werkzeugs an einer Werkzeugmaschine, insbesondere an einer Biegepresse - Google Patents

Vorrichtung zum Verriegeln eines Werkzeugs an einer Werkzeugmaschine, insbesondere an einer Biegepresse Download PDF

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Publication number
EP1884298B1
EP1884298B1 EP06425566A EP06425566A EP1884298B1 EP 1884298 B1 EP1884298 B1 EP 1884298B1 EP 06425566 A EP06425566 A EP 06425566A EP 06425566 A EP06425566 A EP 06425566A EP 1884298 B1 EP1884298 B1 EP 1884298B1
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EP
European Patent Office
Prior art keywords
jaw
tool
safety hook
shank
seat
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EP06425566A
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English (en)
French (fr)
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EP1884298A1 (de
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Giuseppe Vittorio Gianelli
Alessandro Casaroli
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Teda Srl
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Teda Srl
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Priority to AT06425566T priority Critical patent/ATE425824T1/de
Priority to DE602006005807T priority patent/DE602006005807D1/de
Priority to EP06425566A priority patent/EP1884298B1/de
Publication of EP1884298A1 publication Critical patent/EP1884298A1/de
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    • 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 device for locking a tool on a machine tool, particularly a plate bending press, according to the preamble of claim 1.
  • presses for carrying out bending operations are known.
  • Bending presses are constituted by a lower footing, which defines a fixed plate supporting surface and has a bending template, according to the profile of which the metal plate is to be bent.
  • a slider is supported so that it can move with a reciprocating straight-line motion along a direction which is perpendicular to the fixed surface toward and away from it above the footing.
  • a bending tool is rigidly coupled to the slider and is adapted to cooperate with the template provided on the fixed surface. The movement of the slider is generated by a mechanical or hydraulic actuation device, which provides the force required for the deformation operation.
  • the tool is constituted by a body in which the lower end is profiled so as to cooperate with the template provided on the fixed surface and the upper end forms a shank for coupling to the slider.
  • the slider is provided with a device for locking the tool, which acts as a clamp on the shank of the tool.
  • known tools are provided monolithically or are divided, along their length, into a plurality of segments.
  • the tools are of the interchangeable type, since their shape, together with the shape of the corresponding template, can vary according to the bending profile to be provided.
  • Such shank has, on at least one side, a seat such as a cavity, slot or channel, which lies transversely to the height of the tool and is for example C-shaped and in which a retention tooth of the locking device engages.
  • a seat such as a cavity, slot or channel, which lies transversely to the height of the tool and is for example C-shaped and in which a retention tooth of the locking device engages.
  • Known locking devices are of the clamp type and comprise a fixed jaw, which is rigidly coupled to the slider; a movable jaw, which is pivoted to said fixed jaw; and linear actuation means, such as hydraulic cylinders, which are adapted to move closer and space apart the movable jaw with respect to the fixed jaw respectively to lock and release the shank of the tool.
  • Tool changing is problematic and difficult especially during the extraction of the tool to be changed and the insertion of the replacement tool.
  • Extraction and insertion of the tools with a standard shank occurs either by horizontal sliding or by means of a combined translational and rotary motion on the vertical plane respectively downwardly and vice versa.
  • the tool constituted by a single body or divided into a plurality of segments, the distance between two segments being less than their lengths, is made to slide parallel to the horizontal plane along the entire length of the press and is extracted and inserted from the sides of said press.
  • a drawback of this extraction by horizontal sliding consists in that it requires large maneuvering spaces at the sides of the press, and such spaces are not easily available.
  • Still another drawback of the extraction by horizontal sliding is that in the case of a tool divided into a plurality of segments which are individually longer than the relative distance of one segment with respect to the other, when it is necessary to replace a segment in an intermediate position it is necessary to extract first of all the segments that precede it, and this consequently entails a further increase in replacement times and an onerous slowing of production.
  • EP 1 244 528 B 1 discloses a locking device of this type, in which the movable jaw is provided, on its face directed toward the fixed jaw, with a plurality of teeth which cooperate with corresponding secondary teeth or receptacles formed in the safety hook.
  • the movable jaw is provided with a lower tooth, which acts on a V-shaped spring which is fixed at one end to a protrusion provided on the safety hook; the function of this lower tooth is to apply to the safety hook, by means of the V-shaped spring, the necessary tightening force on the shank of the tool, locking it against the fixed jaw.
  • the movable jaw is further provided with an intermediate lug, which is directed upwardly and defines a recess for the insertion of a corresponding pawl which protrudes from the outer curve of the safety hook; the function of this intermediate lug is to keep the safety hook temporarily suspended, when the tool is inserted, during the tightening and loosening of the two jaws.
  • the movable jaw is provided with an upper tab, which cooperates with a corresponding tooth formed on the outer curve of the safety hook; the function of said tab is to prevent, when the jaws are open and the tool is inserted, the upward sliding of the safety hook.
  • the tool is extracted and inserted with a combined translational and rotary motion of the tool on the vertical plane respectively downwardly and vice versa.
  • Another drawback of this known locking device consists in that it does not ensure adequate safety conditions during the operations for replacing the tools. Keeping the safety hook in suspended conditions and preventing its upward sliding, both during loosening and during tightening of the two jaws between which the shank of the tool is inserted, are in fact entrusted to the mating between the teeth and the tabs, which are very small.
  • the aim of the present invention is to provide a device for locking a tool on a machine tool, particularly a plate bending press, which allows to perform tool changing operations simply and easily, in a short time and with limited machine downtimes.
  • Another object of the present invention is to provide a device for locking a tool on a machine tool, particularly a plate bending press, which does not require large spaces to perform tool changing operations.
  • Another object of the present invention is to provide a device for locking a tool on a machine tool, particularly a plate bending press, of the type which comprises two jaws, between which a safety hook is interposed, which allows to fix the safety hook so that it is suspended both during loosening and during tightening of the two jaws, thus ensuring the necessary safety conditions for the operators assigned to tool changing.
  • Another object of the present invention is to provide a device for locking a tool on a machine tool, particularly a plate bending press, which is easy to manufacture and can be provided by means of simple and inexpensive machining operations.
  • Another object of the present invention is to provide a device for locking a tool on a machine tool, particularly a plate bending press, which allows to lock a tool stably and safely.
  • Another object of the present invention is to achieve said aim and objects with a structure which is simple, relatively easy to provide in practice, safe in use, effective in operation, and relatively low in cost.
  • the present device for locking a tool on a machine tool, particularly a plate bending press, comprising a first jaw and a second jaw, which can move toward each other and away from each other, and at least one safety hook, which is interposed between the first jaw and the second jaw and is provided with a retention tooth adapted to enter a cavity provided in the shank of a tool, characterized in that the second jaw is provided with at least one seat which is open toward the first jaw and with a transverse bar which is accommodated in the seat and is rigidly associated with the second jaw, the safety hook being movably supported by the second jaw and having a claw-shaped portion which is directed toward the first jaw and is accommodated in the space of the seat that is delimited by the bar and whose lower end protrudes so as to define the retention tooth.
  • the reference numeral 1 generally designates a device for locking a tool on a machine tool, particularly a plate bending press.
  • the device 1 is usable particularly but not exclusively on plate bending presses in order to lock a tool 2 provided as a monolithic body or divided into a plurality of segments.
  • a bending press not shown since it is of the known type, comprises a lower footing, which defines a fixed surface for supporting the metal plate and is provided with a bending template, according to the profile whereof the metal plate is to be bent.
  • a slider is supported so that it can move with a reciprocating rectilinear motion at right angles to the fixed plane toward or away from it above the footing. The movement of the slider is generated by a mechanical or hydraulic actuation device, which provides the force required for the deformation operation.
  • a bending tool 2 is rigidly coupled to the slider; the device 1 therefore can be rigidly associated with the slider of a bending press in order to lock thereon a tool 2.
  • a device 1 in the active configuration in which it is rigidly coupled to the slider of a bending press, and the Cartesian system rigidly associated with the press, in which the horizontal plane is constituted by the fixed plate supporting surface and the vertical plane is constituted by the plane on which the slider slides, is taken as a spatial reference system.
  • the terms “upper” and “lower” are referred to the device 1 in normal configuration for use.
  • the tool 2 of a conventionally known type, is constituted by a body the lower end whereof is shaped so as to cooperate with the template arranged on the fixed surface of the press and the upper end whereof defines a shank 20 for coupling to the device 1.
  • a cavity 21 which has a C-shaped cross-section or the like and, as will become better apparent hereinafter, has a safety function by cooperating with the device 1 in order to keep the tool 2 in a suspended condition during the steps for insertion and extraction.
  • the device 1 comprises a first jaw 3 and a second jaw 4, which can move toward and away from each other, and at least one safety hook 5, which is interposed between the first jaw 3 and the second jaw 4.
  • first jaw and “second jaw” has no limiting meaning, since it is used merely for the sake of simplicity in description.
  • the safety hook 5 comprises a claw-shaped portion 50, the lower end of which is provided with a retention tooth 51, which is adapted to enter the cavity 21 of the shank 20 in order to keep the tool 2 in the suspended configuration at the end of the insertion step and at the beginning of the step for extracting said tool.
  • the first jaw 3 is adapted to be rigidly coupled to the slider of the press and has the shape shown in Figure 6 .
  • the first jaw 3 comprises a body 30, which is adapted to be anchored to the slider of a press and is provided with a sliding surface 31, which faces the second jaw 4 and on which the face 22 of the shank 20, which lies opposite the surface 23 at which the cavity 21 is provided, is adapted to slide.
  • a surface 32 for stopping the sliding of the shank 20 is provided below the sliding surface 31, runs substantially perpendicularly to the sliding surface 31, and is adapted to make contact with a corresponding protrusion 24 which protrudes from the face 22 of the shank 20.
  • the second jaw 4 is pivoted in a central position, by means of a joint 6 of a known type, to the first jaw 3.
  • Linear actuation means act between the upper ends of the first jaw 3 and of the second jaw 4 and are adapted to move the lower ends of the two jaws toward each other and away from each other respectively to tighten and release the tool 2.
  • the linear actuation means are constituted by a pneumatic cylinder, not shown, which in the retracted configuration keeps the two jaws open, i.e., keeps their respective lower ends spaced in the release configuration, and which, in the extended configuration, keeps the two jaws closed, i.e., keeps their respective lower ends closer in the tightening configuration.
  • a gasket 7 of the pusher cylinder is further provided between the upper ends of the first jaw 3 and of the second jaw 4.
  • Elastic contrast means 8 adapted to keep the two jaws open, are provided proximate to the lower ends of the first jaw 3 and of the second jaw 4, i.e., below the joint 6.
  • the second jaw 4 has the shape shown in Figures 2 to 4 .
  • the second jaw 4 comprises a body 40, in which one or more open seats 41 are provided in which the opening is directed toward the first jaw 3 in the assembled configuration.
  • the seats 41 are closed, on the opposite side with respect to the first jaw 3, by an arc-like wall 42 the concavity whereof is directed toward the first jaw 3 in the assembled configuration.
  • the arc-like wall 42 cooperates with the outer curve of the claw-shaped portion 50 of the safety hook 5 during the different steps of the operation of the device 1.
  • the arc-like wall 42 can be deformed elastically, and this, as will become better apparent hereinafter, allows the full tightening of the two jaws despite the stop abutment of the protrusion 24 of the shank 20 against the stop surface 32 of the first jaw 3.
  • the second jaw 4 further comprises a transverse bar 43, which is rigidly coupled thereto and is accommodated in the seats 41 in front of the arc-like wall 42.
  • each seat 41 is delimited laterally by two sides 44, in which there is a slot 45 for containing a corresponding anchoring portion of the bar 43; means for fixing said anchoring portions to the second jaw 4 are provided.
  • the fixing means comprise screws 46, which can be inserted through corresponding holes 47, which are provided in the bottom of the slot 45 and can be coupled so as to engage threaded holes formed in the bar 43.
  • the claw-shaped portions 50 of one or more safety hooks 5 are accommodated within the space formed inside each seat 41 and delimited at the front by the bar 43.
  • the safety hooks 5 are thus supported by the second jaw 4 so that they can move with respect to said jaw both by sliding and by rotating on a vertical plane.
  • each safety hook 5 has a respective claw-shaped portion 50 which is accommodated within the space formed by a seat 41 and delimited at the front by the bar 43, the claw-shaped portion 50 being arranged so as to surround the bar 43 with considerable play.
  • the second jaw 4 further comprises a surface 48 for the abutment of the safety hook 5 which in the assembly configuration faces the first jaw 3 and lies above the seats 41.
  • the bar 43 has a substantially right-angled quadrangular cross-section, with corners which are cut by inclined planes.
  • the bar 43 comprises a front side 430, which in the assembled configuration is directed toward the first jaw 3 and is substantially parallel to the abutment surface 48 and is staggered forward with respect to it; the front side 430 is adapted to make contact with the surface 23 of the shank 20 which lies above the cavity 21 in order to tighten the shank 20 between the two jaws.
  • the front side 430 applies to the shank 20 the tightening force transmitted by the pneumatic cylinder to the two jaws.
  • a surface 431 for supporting the safety hook protrudes from the upper edge of the front side 430; said supporting surface 431 is inclined in the opposite direction with respect to the first jaw 3, i.e., seen from the front as in the accompanying figures from the bottom upwardly and from right to left, by an angle ranging from 30° to 60°.
  • the supporting surface 431 is inclined by an angle of substantially 45°, i.e., equal to 45° minus usual tolerances.
  • the safety hook 5 has the shape shown in Figure 5 .
  • the safety hook 5 has a claw-shaped portion 50 which is provided at the lower end of the retention tooth 51 adapted to enter the cavity 21 of the shank 20.
  • a guiding profile 52 is formed proximate to the lower end of the claw-shaped portion 50 and to its outer curve and is adapted to facilitate the insertion of the shank 20.
  • An abutment surface 53 is formed on the internal curve of the claw-shaped portion 50 and proximate to the upper end thereof and duplicates the inclined supporting surface 431 on which it is meant to rest by sliding at the end of the step for the insertion of the shank 20 ( Figure 8f ).
  • a stem 54 protrudes from the upper end of the claw-shaped portion 50 and is provided with a wing 55 which is directed toward the second jaw 4 and rests so that it can slide freely on the abutment surface 48.
  • the wing 55 is beveled or rounded so as to form, when resting on the abutment surface 48, a fulcrum for the relative rotation of the second jaw 4 and of the safety hook 5.
  • a protrusion 56 protrudes from the stem 54, on the opposite side with respect to the wing 55, toward the first jaw 3 and defines an abutment for the tip 25 of the shank 20.
  • the shank 20 of the tool 2 is shown in Figure 7 ; it has a surface 23 at which the cavity 21 adapted to cooperate with the retention tooth 51 is provided.
  • the shank 20 further has a face 22 which lies opposite the surface 23 and is adapted to make contact, by vertical sliding, with the sliding surface 31 formed on the first jaw 3; a protrusion 24 protrudes from the face 22 substantially at right angles thereto and is adapted to abut against the surface 32 for stopping the sliding of the shank 20 which is provided in the first jaw 3.
  • the shank 20 ends in an upward region with a tip 25 which is adapted to make contact with the protrusion 56 of the safety hook 5.
  • the device 1 allows to insert and extract the tool 2 with a combined vertical translational and rotary motion from the bottom upwardly and vice versa.
  • Figures 8a-8f illustrate sequentially the steps for the insertion of the shank 20 of a tool 2 between the two jaws of the device 1.
  • the first jaw 3 and the second jaw 4 are kept open, i.e., with their lower ends mutually spaced, by the elastic contrast means 8, the pneumatic cylinder which acts between their upper ends being in the retracted configuration.
  • the tool 2 is inserted manually by applying thereto a vertical thrust from the bottom upwardly, as indicated by the arrow of Figure 8a .
  • the tip 25 of the shank 20 makes contact with the guiding profile 52, beyond which the surface 23 slides in contact with the retention tooth 51, while the outer curve of the claw-shaped portion 50 makes contact with the lower end of the arc-like wall 42 ( Figure 8b ).
  • the tip 25 makes contact with the protrusion 56 and applies an upward thrust thereto, lifting and turning the safety hook 5 ( Figure 8d ), the retention tooth 51 whereof enters the cavity 21.
  • the outer curve of the claw-shaped portion 50 of the safety hook 5 rests on the lower end of the arc-like wall 42, the abutment surface 53 rests against the supporting surface 431 of the bar 43, the surface 23 makes contact with the stem 54, and the retention tooth 51 makes contact with the upper edge of the cavity 21.
  • FIGS 9a-9c illustrate sequentially the steps for tightening the two jaws.
  • the pneumatic cylinder is in the extended configuration, applying to the upper ends of the two jaws a force which contrasts the reaction of the elastic means 8.
  • the second jaw 4 rotates about the fulcrum formed by the joint 6 and transmits, by means of the safety hook 5, an upward thrust to the tool 2, which slides along the sliding surface 31.
  • the safety hook 5 slides upwardly and the bar 43, rigidly coupled to the second jaw 4, moves toward the shank 20 until the front side 430 thereof makes contact with the surface 23 of the shank 20.
  • Figure 9c illustrates the locking configuration of the device 1, in which the tightening force of the two jaws is transferred to the shank 20, which is locked between the sliding surface 31 and the front side 430 of the bar 43.
  • Figures 10a-10c illustrate sequentially the steps for the spacing of the two jaws to release the tool 2.
  • the pneumatic cylinder is returned to the retracted configuration and the second jaw 4, by way of the elastic reaction of the elastic means 8, rotates about the joint 6, moving its lower end away from the first jaw 3.
  • the retention tooth 51 slides along the surface 23.
  • Figures 12a-12c illustrate sequentially the step for the extraction of the tool 2 without rotation.
  • the locking device allows to perform tool replacement operations, both when the tool is constituted by a monolithic body and when it is constituted by a plurality of segments, simply and with easy maneuvers for insertion and extraction with combined sliding and rotation movements on a vertical plane, in a short time and with limited machine downtimes.
  • the locking device according to the invention allows to perform insertion and extraction of the tool safely, ensuring that said tool is retained in the momentarily suspended configuration when the jaws are open, by being supported by the safety hook.
  • the safety hook as well as the jaw that supports it, have no teeth or tabs which are adapted to mate in order to keep the hook suspended.
  • the configuration of the seat for accommodating the claw-shaped portion of the safety hook and the presence therein of the transverse bar allow to support the safety hook so that it can move with respect to the jaw and in full safety.
  • the elasticity of the arc-like wall that closes in a rear region the seat of the claw-shaped portion of the safety hook allows to apply to the shank of the tool the necessary tightening force, locking it safely and stably.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Presses And Accessory Devices Thereof (AREA)

Claims (18)

  1. Eine Vorrichtung (1) zum Verriegeln eines Werkzeugs (2) an einer Werkzeugmaschine, insbesondere einer Biegepresse für Bleche, die eine erste Backe (3) und eine zweite Backe (4) umfasst, welche sich zueinander hin und voneinander fort bewegen können, und mindestens einen Sicherheitshaken (5), der zwischen der ersten Backe (3) und der zweiten Backe (4) angeordnet und mit einem Sperrzahn (51) versehen ist, ausgebildet, um in einen Hohlraum (21) einzudringen, der im Schaft (20) eines Werkzeugs (2) bereitgestellt ist, dadurch gekennzeichnet, dass die zweite Backe (4) mit mindestens einem Sitz (41) ausgestattet ist, der zur ersten Backe (3) hin offen ist, und mit einem Querträger (43), der in dem Sitz (41) untergebracht ist und starr mit der zweiten Backe (4) verbunden ist, wobei der Sicherheitshaken (5) so gelagert ist, dass er sich durch die zweite Backe (4) bewegen kann, und einen klauenförmigen Abschnitt (50) hat, der zur ersten Backe (3) hin gerichtet ist und in dem Raum des Sitzes (41) untergebracht ist, welcher von dem Querträger (43) begrenzt wird, und dessen unteres Ende herausragt, um den Sperrzahn (51) zu bestimmen.
  2. Die Vorrichtung (1) gemäß Anspruch 1, dadurch gekennzeichnet, dass der Sitz (41) auf der Seite, die der ersten Backe (3) gegenüberliegt, von einer bogenartigen Wand begrenzt wird, deren Konkavität zur ersten Backe (3) hin gerichtet ist, wobei die bogenartige Wand (42) ausgebildet ist, um mit dem klauenförmigen Abschnitt (50) des Sicklerheitshakens (5) zusammenzuwirken.
  3. Die Vorrichtung (1) gemäß Anspruch 2, dadurch gekennzeichnet, dass die bogenartige Wand (42) elastisch verformbar ist.
  4. Die Vorrichtung (1) gemäß einem der obigen Ansprüche, dadurch gekennzeichnet, dass der Sitz (41) lateral von zwei Seiten (44) begrenzt wird, wobei ein Schlitz (45) in mindestens einer der zwei Seiten (44) geformt ist, um einen Verankerungsabschnitt des Querträgers (43) zu enthalten, wobei Mittel zur Befestigung des Verankerungsabschnitts an der zweiten Backe (4) bereitgestellt werden.
  5. Die Vorrichtung (1) gemäß einem der obigen Ansprüche, dadurch gekennzeichnet, dass die zweite Backe (4) eine Oberfläche (48) für das Widerlager des Sicherheitshakens (5) umfasst, die zur ersten Backe (3) hin weist und oberhalb des Sitzes (41) liegt.
  6. Die Vorrichtung (1) gemäß Anspruch 5, dadurch gekennzeichnet, dass der Querträger (43) eine Vorderseite (430) umfasst, die zur ersten Backe (3) hin gerichtet ist und im Wesentlichen parallel zu der Widerlageroberfläche (48) und im Verhältnis zu ihr nach vorne versetzt ist, wobei die Vorderseite ausgebildet ist, um in Kontakt mit der Oberfläche des Schafts (20) zu stehen, die oberhalb des Hohlraums (21) liegt.
  7. Die Vorrichtung (1) gemäß Anspruch 5 oder 6, dadurch gekennzeichnet, dass die Widerlageroberfläche (48) auf einer im Wesentlichen vertikalen Ebene liegt, wenn die erste Backe (3) und die zweite Backe (4) in der Befestigungsanordnung nahe beieinander sind.
  8. Die Vorrichtung (1) gemäß Anspruch 6 oder 7, dadurch gekennzeichnet, dass der Querträger (43) mit einer Oberfläche (431) zum Stützen des Sicherheitshakens (5) versehen ist, die von der Oberkante der Vorderseite her verläuft und in die der ersten Backe (3) entgegengesetzte Richtung geneigt ist.
  9. Die vorrichtung (1) gemäß Anspruch 8, dadurch gekennzeichnet, dass die Stützoberfläche (431) im Verhältnis zur Vorderseite um einen Winkel geneigt ist, der im Bereich von 30° bis 60° liegt.
  10. Die Vorrichtung (1) gemäß Anspruch 9, dadurch gekennzeichnet, dass der Winkel im Wesentlichen 45° beträgt.
  11. Die Vorrichtung (1) gemäß einem der Ansprüche 8 bis 10, dadurch gekennzeichnet, dass der Sicherheitshaken (5) mit einer widerlageroberfläche versehen ist, welche der schräge Stützoberfläche (431) folgt und an der inneren Krümmung des oberen Endes des klauenförmigen Abschnitts (50) gebildet ist.
  12. Die Vorrichtung (1) gemäß einem der obigen Ansprüche, dadurch gekennzeichnet, dass der Sicherheitshaken (5) eine Stange (54) umfasst, die aus dem oberen Ende des klauenförmigen Abschnitts (50) herausragt und mit einem Flügel (55) ausgestattet ist, welcher zu der zweiten Backe (4) hin gerichtet und ausgebildet ist, um auf der widerlageroberfläche aufzuliegen, so dass er frei gleiten kann.
  13. Die Vorrichtung (1) gemäß Anspruch 12, dadurch gekennzeichnet, dass der Flügel (55) abgeschrägt ist, um, wenn er auf der Widerlageroberfläche aufliegt, einen Drehpunkt für die relative Drehung der zweiten Backe (4) und des Sicherheitshakens (5) zu bilden.
  14. Die Vorrichtung (1) gemäß einem der obigen Ansprüche, dadurch gekennzeichnet, dass der Sicherheitshaken (5) mit einem Vorsprung (56) versehen ist, der nahe dem oberen Ende des klauenförmigen Abschnitts (50) geformt ist, welcher zu der ersten Backe (3) hin ragt, wobei der Vorsprung (56) ein Widerlager für die Spitze des Schafts (20) bildet.
  15. Die Vorrichtung (1) gemäß Anspruch 14 und Anspruch 12 oder 13, dadurch gekennzeichnet, dass der Vorsprung (56) so geformt ist, dass er aus dem Stamm (54) herausragt.
  16. Die Vorrichtung (1) gemäß einem der obigen Ansprüche, dadurch gekennzeichnet, dass der klauenförmige Abschnitt (50) des Sicherheitshakens (5) nahe dem unteren Ende davon bereitgestellt wird, mit einem Führungsprofil (52) zum Einführen des Schafts (20).
  17. Die Vorrichtung (1) gemäß einem der obigen Ansprüche, dadurch gekennzeichnet, dass die erste Backe (3) starr mit einer Werkzeugmaschine (2) verbunden werden kann, und dadurch, dass die zweite Backe (4) in einer zentralen Position drehgelenkig mit der ersten Backe (3) verbunden ist, wobei lineare Betätigungsmittel bereitgestellt werden, die gegen die elastischen Mitteln zwischen den oberen Enden der ersten Backe (3) und der zweiten Backe (4) arbeiten.
  18. Die Vorrichtung (1) gemäß einem der obigen Ansprüche, dadurch gekennzeichnet, dass die erste Backe (3) eine Oberfläche (31) umfasst, die zur zweiten Backe (4) hin weist, zum Gleiten der Fläche des Schafts (20), welche gegenüber dem Hohlraum (21) liegt, und eine Oberfläche (32) zum Anhalten des Gleitens des Schafts (20), die im Wesentlichen in rechten Winkeln zu der Gleitoberfläche (31) liegt und ausgebildet ist, um in Kontakt mit einem entsprechenden Vorsprung zu stehen, der an der Fläche des Schafts (20) geformt ist, welche dem Hohlraum (21) gegenüberliegt.
EP06425566A 2006-08-04 2006-08-04 Vorrichtung zum Verriegeln eines Werkzeugs an einer Werkzeugmaschine, insbesondere an einer Biegepresse Active EP1884298B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AT06425566T ATE425824T1 (de) 2006-08-04 2006-08-04 Vorrichtung zum verriegeln eines werkzeugs an einer werkzeugmaschine, insbesondere an einer biegepresse
DE602006005807T DE602006005807D1 (de) 2006-08-04 2006-08-04 Vorrichtung zum Verriegeln eines Werkzeugs an einer Werkzeugmaschine, insbesondere an einer Biegepresse
EP06425566A EP1884298B1 (de) 2006-08-04 2006-08-04 Vorrichtung zum Verriegeln eines Werkzeugs an einer Werkzeugmaschine, insbesondere an einer Biegepresse

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EP06425566A EP1884298B1 (de) 2006-08-04 2006-08-04 Vorrichtung zum Verriegeln eines Werkzeugs an einer Werkzeugmaschine, insbesondere an einer Biegepresse

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EP1884298A1 EP1884298A1 (de) 2008-02-06
EP1884298B1 true EP1884298B1 (de) 2009-03-18

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015036981A1 (en) 2013-09-13 2015-03-19 Rolleri S.P.A. Locking device for locking tools in a press brake
IT202000016165A1 (it) 2020-07-03 2022-01-03 Teda S R L Dispositivo di bloccaggio di un utensile ad una macchina utensile, particolarmente una pressa di piegatura di lamiere.

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2569107A1 (de) * 2010-05-13 2013-03-20 Andrea Argentin Vorrichtung zur befestigung eines werkzeuges am positionsanzeiger einer biegepresse
ITVR20100202A1 (it) * 2010-10-22 2012-04-23 Andrea Argentin Dispositivo di fissaggio di un utensile al cursore di una pressa piegatrice
WO2024018428A1 (en) * 2022-07-22 2024-01-25 Rolleri S.P.A. Device for locking tools for a press brake

Family Cites Families (4)

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Publication number Priority date Publication date Assignee Title
IT1311880B1 (it) * 1999-11-30 2002-03-19 Luciano Gasparini Dispositivo per il supporto ed il bloccaggio con funzione di sicurezzadi almeno un utensile intercambiabile, particolarmente in una macchina
US6138492A (en) * 2000-02-25 2000-10-31 Wilson Tool International, Inc. Tool holder for press brakes
US6467327B1 (en) * 2001-08-15 2002-10-22 Wilson Tool International, Inc. Press brake tool and tool holder
FR2851488B1 (fr) * 2003-02-21 2005-05-20 Amada Europ Sa Systeme de fixation pour le montage et le demontage d'un outil de pliage

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015036981A1 (en) 2013-09-13 2015-03-19 Rolleri S.P.A. Locking device for locking tools in a press brake
IT202000016165A1 (it) 2020-07-03 2022-01-03 Teda S R L Dispositivo di bloccaggio di un utensile ad una macchina utensile, particolarmente una pressa di piegatura di lamiere.

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Publication number Publication date
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DE602006005807D1 (de) 2009-04-30
ATE425824T1 (de) 2009-04-15

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