EP1545808B1 - Bending machine - Google Patents

Bending machine Download PDF

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Publication number
EP1545808B1
EP1545808B1 EP03740347A EP03740347A EP1545808B1 EP 1545808 B1 EP1545808 B1 EP 1545808B1 EP 03740347 A EP03740347 A EP 03740347A EP 03740347 A EP03740347 A EP 03740347A EP 1545808 B1 EP1545808 B1 EP 1545808B1
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EP
European Patent Office
Prior art keywords
drive
bending machine
machine according
force
bending
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Expired - Lifetime
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EP03740347A
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German (de)
French (fr)
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EP1545808A1 (en
Inventor
Wolfgang Kutschker
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RAS Reinhardt Maschinenbau GmbH
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RAS Reinhardt Maschinenbau GmbH
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Publication of EP1545808A1 publication Critical patent/EP1545808A1/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/02Stamping using rigid devices or tools
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D5/00Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/02Bending sheet metal along straight lines, e.g. to form simple curves on press brakes without making use of clamping means
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D5/00Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/04Bending sheet metal along straight lines, e.g. to form simple curves on brakes making use of clamping means on one side of the work
    • B21D5/042With a rotational movement of the bending blade

Definitions

  • the invention relates to a bending machine comprising a machine frame, a bending beam with a bending beam tool which is pivotable about a pivot axis to bend a tab of a workpiece made of flat material, a top cheek with a top cheek tool and a bottom cheek with a lower cheek tool, wherein the upper cheek and the lower cheek movable relative to each other are mounted on the machine frame, and at least one drive for moving toward each other of the Oberwangentechnikmaschines and the lower cheek tool to act on a lying therebetween workpiece from sheet material for bending the flap by means of the bending cheek.
  • Such bending machines are known from the prior art (see for example DE 38 37 603 A1).
  • the drive is dimensioned so that it can generate large enough forces to hold a workpiece between the upper beam and the lower beam.
  • the invention is therefore an object of the invention to improve a bending machine of the generic type such that the largest possible, acting from the upper beam tool and lower beam tool on the workpiece forces are achievable as inexpensively.
  • the at least one drive at least one traversing drive for generating an opening and closing movement of the upper beam and lower beam relative to each other and at least one power drive to generate a larger force than the traversing drive for forming the between the upper cheek tool and the lower cheek tool arranged workpiece comprises, and that the positioning drive is stationary during forming and blocked.
  • the advantage of the solution according to the invention is the fact that with the traversing a fast relative movement between the upper beam and lower beam is generated while the power drive opens up the additional possibility to act with great forces of Oberwangentechnikmaschinemaschine and lower beam tool on the workpiece to perform in this forming to be able to.
  • reshaping is to be understood as a shaping of a workpiece under the interaction of the upper cheek tool and the lower cheek tool.
  • Such reshaping includes, for example, closing and compressing bends or envelopes, embossing beads or any other type of forming operations in flat materials.
  • the power drive can be interpreted particularly favorably if it is designed to produce a force that moves the upper beam tool and the lower beam tool toward one another at a lower travel speed than the traction drive.
  • the drive power for the power drive can be kept small in spite of large power generated and the fast, over long travel paths traversing movements can be moved to the traversing drive.
  • the force that can be generated by the power drive exceeds the force that can be generated by the travel drive by a factor of at least two, better at least five, even better at least ten.
  • an advantageous embodiment provides that the end of the upper beam of the at least one respective drive and a power drive comprehensive drive is arranged.
  • the drive unit causes a relative movement of the upper beam to the lower beam, and thereby acts on the upper beam and the lower beam, so it is not necessarily provided that the drive unit only directly and directly on the upper beam and the lower cheek must act.
  • one of the cheeks, in particular the lower cheek is firmly connected to the machine frame.
  • the drive unit also acts within the meaning of the invention only between the upper beam and lower beam when the drive unit engages the machine frame, since this is firmly connected to one of the cheeks and thus also the drive unit between this firmly connected to the machine frame cheek and the movable cheek is connected.
  • the traversing drive comprises a blocking device effective at standstill.
  • This blocking device provides the opportunity to ensure that the traversing drive executes in any case at a standstill no movement and thus the entire force of the power drive can be effective.
  • a blocking device provides another favorable solution that the traversing drive is blocked at standstill by self-locking.
  • This solution has the advantage that the blocking device can be omitted or at least, if it is still available for security reasons, can be designed so that it has to absorb lower forces.
  • the positioning drive is designed as a spindle drive, comprising a threaded spindle and a spindle nut.
  • the power drive is designed as a hydraulic drive.
  • the hydraulic drive comprises a plurality of parallel piston surfaces.
  • the hydraulic drive could indirectly, ie be effective via an intermediate gear, it is particularly favorable, however, if the hydraulic drive is arranged directly acting in the drive unit, that is, the hydraulic drive causes the relative movement of the upper beam and lower beam itself without intermediate gear.
  • a hydraulic unit of the hydraulic drive is arranged on one of the cheeks.
  • the power drive comprises a lever mechanism with a drive for this.
  • the drive for the lever mechanism can be either a rotary actuator or a linear drive. It is even conceivable as a linear drive to provide a pneumatically or hydraulically actuated cylinder.
  • the bending machine according to the invention can be formed more easily if a control is provided which uses either the travel drive or the power drive, so that in particular the travel drive does not have to work under conditions in which the greater force of the power drive is effective.
  • the force generated by the power drive can be controlled by the controller, so that the use of the full force of the power drive can be dosed only at the respective corresponding processing operations.
  • a particularly advantageous solution provides that the controller uses the power drive depending on the particular machining operation.
  • the power drive is then used only in those cases in which a deformation of the workpiece, so for example a bending of an envelope, closing an envelope or any kind of further forming process is to be performed by the upper cheek and the lower cheek tool.
  • control during clamping of the workpiece for bending the same by means of the bending beam finally uses the power drive, so that the power drive always acting ultimately on the workpiece Force generated.
  • control of each application of the workpiece by means of the Oberwangentechnikmaschines and the lower beam tool to a processing of the workpiece finally uses the power drive and thus in each case for processing the producible by the power drive force can be exploited.
  • An embodiment of a bending machine according to the invention shown in Figure 1, comprises a generally designated 10 machine frame, with lateral uprights 12 and 14, between which, as shown in Figure 2, a top cheek 16 and a bottom cheek 18 extend.
  • the lower beam 18 is fixedly connected to the uprights 12 and 14, while the upper beam 16 is movable relative to the lower beam 18.
  • the upper beam 16 carries a Oberwangenwerkmaschine 20 and the lower cheek 18 a lower cheek tool 22, between which a workpiece 24 made of flat material, such as sheet metal, so clamped that from this on the Oberwangenwerkmaschine 20 and the lower cheek tool 22 protruding cloth from a through the lower cheek tool 22 and the Oberwangenwerkmaschine 20 fixable plane 28 is clearlybiegbar.
  • the bending machine is provided with a bending cheek 30 which extends between the end of the same arranged bending cheek holders 32 and with these bending cheek holders 32 is movable about a pivot axis 34, wherein the pivot axis 34 is preferably above the clamping plane 28.
  • the bending cheek acts with a bending beam tool 36 on the fold over tab 26 of the workpiece for bending, wherein the entire bending cheek 30 is pivotable about the pivot axis 34.
  • the bending machine is provided with a controllable by a controller 42 drive, comprising two drive units 46 and 48, each in end portions 52 and 54 of the Upper cheek 16 and the lower cheek 18 are arranged, and a relative movement between the upper cheek 16 and the lower cheek 18, in the example illustrated lifting the upper jaw 16 with the Oberwangentechnikzeug 20 from lying on the lower cheek 18 with the lower cheek tool 22 workpiece 24 or applying the Workpiece 24 with the upper beam tool 20 against the lower beam tool 22 effect.
  • a controller 42 drive comprising two drive units 46 and 48, each in end portions 52 and 54 of the Upper cheek 16 and the lower cheek 18 are arranged, and a relative movement between the upper cheek 16 and the lower cheek 18, in the example illustrated lifting the upper jaw 16 with the Oberwangentechnikmaschine 20 from lying on the lower cheek 18 with the lower cheek tool 22 workpiece 24 or applying the Workpiece 24 with the upper beam tool 20 against the lower beam tool 22 effect.
  • each of the drive units in this case the illustrated drive unit 46, comprises a travel drive 56 and a power drive 58, which are both directly coupled to each other, so that the drive unit 46 on the one hand bears on a bearing element 62 acts, which is fixedly connected to the upper beam 16 and on the other hand acts on the lower beam 18 via a fixedly connected to the lower beam 18 bearing member 64.
  • the drive unit 46 is constructed so that both the travel drive 56 and the power drive 58 either alternately or jointly act on the bearing element 62 and on the bearing element 64, depending on how they are controlled by the controller 42.
  • the traversing drive 56 comprises a non-rotatably held threaded spindle 66, which extends transversely to the clamping plane 28 with its longitudinal axis 68 and thereby passes through a spindle nut 70 in the direction of the longitudinal axis 68 of the threaded spindle 66 by two bearings 72nd and 74 immovably, but is rotatably held about the longitudinal axis 68 in the bearing housing 64 designed as a bearing element 64.
  • this is peripherally provided with an outer toothing 76, in which a worm 78 engages, so that the worm 78 and the outer toothing 76 form a worm gear.
  • the worm 78 is driven by a common drive shaft 80 which extends between the two drive units 46 and 48 and in turn via a reduction gear 82 by a motor 84 anteibbar so that always the spindle nuts 70 both drive units 46 and 48 synchronously to each other via the Motor 84 can be driven.
  • the entire travel drive 56 that is, the totality of threaded spindle 66, spindle nut 70, worm gear 76, 78, reduction gear 82 and motor 84 is formed so that it at standstill of the motor 84 due to the self-locking movement of the threaded spindle 66 in the direction of its longitudinal axis 68th blocked.
  • the threaded spindle 66 is connected to one end 88, preferably with the upper cheek 16 end facing 88, fixed to a piston rod 92 of a triple piston 94, which, as in Figure 3 and 4 three in the direction a longitudinal axis 96 of the piston rod 92 successively arranged annular piston surfaces 102, 104, 106, which facing cylinder chambers 112, 114, 116 are arranged in a cylinder housing 118, wherein the cylinder chambers 112, 114, 116 via a distribution channel 120 in the cylinder housing 118 simultaneously fed hydraulic medium is, so that by applying the piston surfaces 102, 104, 106 in small construction of the power drive 58, a large force can be generated.
  • the supply of the cylinder chambers 112, 114, 116 is effected by a hydraulic unit 122, which is preferably seated on the upper cheek 16 and can be controlled by the controller 42 to produce pressurized hydraulic medium for movement of the piston 94 relative to the cylinder housing 118.
  • the cylinder housing 118 is in turn seated on the fixedly connected to the upper beam 16 bearing member 62, and the same on a lower cheek 18 side facing away, so that an admission of the cylinder chambers 112, 114, 116 with hydraulic medium causes the cylinder housing 118 on the bearing element 62 acts and this is acted upon together with the upper beam 16 in the direction of the lower beam 18 and thus the cylinder housing 118 moves relative to the piston rod 92 in the direction of the lower beam 18.
  • a plate spring package 124 is provided, which is supported on the one hand on the bearing element 62 and on the other hand to a support ring 126, which simultaneously represents a connection to the end 88 of the spindle 66.
  • the plate spring assembly 124 causes the bearing member 62 moves together with the upper beam 16 in the direction of the lower beam 18 away when the cylinder chambers 112, 114, 116 are depressurized and thus the cylinder housing 118 against the piston 94 in the direction of the lower beam 18 away can move.
  • the cup spring package 124 is dimensioned so that the cylinder housing 118 is displaced away from the lower beam 18 up to a mechanical stop without pressurizing the cylinder chambers 112, 114, 116.
  • the force is sufficient, for example, in many bending operations by means of the bending cheek 30 to clamp the workpiece 24.
  • the power drive 58 can be used, which is able to generate a force which exceeds that of the travel drive 56 by more than twice, more preferably five times, preferably more than ten times. However, the power drive 58 only allows speeds of relative movement between the upper beam 16 and the lower beam 18 in the range of a few millimeters per second or less.
  • the much higher force which can be generated with the power drive 58 offers the advantage of also implementing additional operations, for example forming of the workpiece, with the bending machine, as shown in FIG. 5 or FIG.
  • additional operations for example forming of the workpiece, with the bending machine, as shown in FIG. 5 or FIG.
  • the use of the power drive 58 is always carried out in the simplest case with stationary positioning drive 56, wherein by the force of the power drive 58 no Reaction to the travel drive 56 to the effect that this would also be adjusted takes place because - as already stated - the positioning drive 56 is designed to be self-locking.
  • the hydraulic unit 122 in such a way that dosed over this the force generated by the power drive 58 and controlled predetermined, so that depending on the type of machining of the workpiece 24 different forces generated by the power drive 58 can be used.
  • the positioning drive 56 is formed in the same manner as in the first embodiment.
  • the power drive 58 ' is not formed as a direct-acting hydraulic drive, but as a lever gear 130 with a long lever 132 and a short lever 134, starting from a common articulated connection point 136 of the long lever 132 with a hinge 138 with the upper beam 16 is connected, while the short lever is connected via a hinge 140 with a power transmission rod 142, which in turn is in communication with the end 88 of the threaded spindle 66.
  • a linear drive 142 is provided for moving the pivot point 136, which may be, for example, a hydraulic drive, but alternatively also a spindle drive.
  • the linear drive 142 is in turn connected via a hinge point 144 also connected to the upper beam 16 and thus mitbewegbar with this.
  • each of the drive units in this case comprises the drive unit 46 ", a power drive 58, which corresponds to that of the first embodiment, while the traversing drive 56 'by a Hydraulic cylinder 150 is formed, which can be fed by a hydraulic unit 152 to drive the upper beam 16 away from the lower beam 18 up and down.
  • the hydraulic cylinder 150 In order to use the power drive 58 at standstill of the hydraulic cylinder 150, the hydraulic cylinder 150 must also be able to absorb the forces applied by the power drive 58. Since this alone is problematic to realize with the hydraulic cylinder 150, the travel drive 56 'is provided with a blocking device 154.
  • a toothed rod 158 arranged as an extension of a piston rod 156 of the hydraulic cylinder 150 and two frontally toothed holding jaws 162 and 164 arranged in a housing 160 interspersed by the toothed rod 158, which are connected via pressure chambers 166 and 168 in the direction of the toothed rod 158 or 158 be moved away from the latter, wherein the holding jaws 162 and 164 engage positively in the state acted upon for the toothed rod 158 in this state.
  • the hydraulic unit 152 is operated so that it always inevitably at standstill of the hydraulic cylinder 150, the blocking device 154 is activated and thus the traverse drive 56 'is automatically blocked at standstill of the hydraulic cylinder 150 against movement, so that the traversing drive 56' at standstill always in the It is able to absorb the forces that may be generated by the power drive 58.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Press Drives And Press Lines (AREA)
  • Inorganic Insulating Materials (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Secondary Cells (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)

Abstract

The bending machine (10) has an upper moveable clamp block (16) and a fixed lower block each having selected tool pieces attached by which the sheet material is clamped during bending by a drive motor (84) and shaft (80) turning worm gears and threaded rods (46,48) to move the lower block.

Description

Die Erfindung betrifft eine Biegemaschine, umfassend ein Maschinengestell, eine Biegewange mit einem Biegewangenwerkzeug, die um eine Schwenkachse schwenkbar ist, um einen Lappen eines Werkstücks aus Flachmaterial umzubiegen, eine Oberwange mit einem Oberwangenwerkzeug und eine Unterwange mit einem Unterwangenwerkzeug, wobei die Oberwange und die Unterwange relativ zueinander bewegbar am Maschinengestell gelagert sind, und mindestens einen Antrieb zum Aufeinanderzubewegen des Oberwangenwerkzeugs und des Unterwangenwerkzeugs, um ein zwischen diesen liegendes Werkstück aus Flachmaterial zum Biegen des Lappens mittels der Biegewange zu beaufschlagen.The invention relates to a bending machine comprising a machine frame, a bending beam with a bending beam tool which is pivotable about a pivot axis to bend a tab of a workpiece made of flat material, a top cheek with a top cheek tool and a bottom cheek with a lower cheek tool, wherein the upper cheek and the lower cheek movable relative to each other are mounted on the machine frame, and at least one drive for moving toward each other of the Oberwangenwerkzeugs and the lower cheek tool to act on a lying therebetween workpiece from sheet material for bending the flap by means of the bending cheek.

Derartige Biegemaschinen sind aus dem Stand der Technik bekannt (siehe beispielsweise DE 38 37 603 A1). Bei diesen Biegemaschinen ist üblicherweise der Antrieb so dimensioniert, daß er ausreichend große Kräfte erzeugen kann, um ein Werkstück zwischen der Oberwange und der Unterwange festzuhalten.Such bending machines are known from the prior art (see for example DE 38 37 603 A1). In these bending machines usually the drive is dimensioned so that it can generate large enough forces to hold a workpiece between the upper beam and the lower beam.

Diese Lösung hat jedoch den Nachteil, daß dann, wenn eine für die erwünschten Bearbeitungszeiten der Werkstücke notwendige Geschwindigkeit der Relativbewegung zwischen Oberwange und Unterwange erreicht werden soll, die Kräfte, mit welchen durch das Oberwangenwerkzeug und Unterwangenwerkzeug auf das Werkstück eingewirkt werden kann, begrenzt sind oder einen wirtschaftlich nicht gerechtfertigten Aufwand erfordern.However, this solution has the disadvantage that when a necessary for the desired processing times of the workpieces speed of the relative movement between the upper beam and lower beam to be achieved, the forces with which can be acted upon by the upper beam tool and lower beam tool on the workpiece are limited or require an economically unjustified effort.

Der Erfindung liegt daher die Aufgabe zugrunde, eine Biegemaschine der gattungsgemäßen Art derart zu verbessern, daß möglichst große, vom Oberwangenwerkzeug und Unterwangenwerkzeug auf das Werkstück wirkende Kräfte möglichst kostengünstig erreichbar sind.The invention is therefore an object of the invention to improve a bending machine of the generic type such that the largest possible, acting from the upper beam tool and lower beam tool on the workpiece forces are achievable as inexpensively.

Diese Aufgabe wird bei einer Biegemaschine der eingangs beschriebenen Art erfindungsgemäß dadurch gelöst, daß der mindestens eine Antrieb mindestens einen Verfahrantrieb zur Erzeugung einer Öffnungs- und Schließbewegung der Oberwange und Unterwange relativ zueinander und mindestens einen Kraftantrieb zur Erzeugung einer größeren Kraft als der Verfahrantrieb zum Umformen des zwischen dem Oberwangenwerkzeug und dem Unterwangenwerkzeug angeordneten Werkstücks umfaßt, und daß der Verfahrantrieb beim Umformen stillsteht und blockiert ist.This object is achieved in a bending machine of the type described above according to the invention that the at least one drive at least one traversing drive for generating an opening and closing movement of the upper beam and lower beam relative to each other and at least one power drive to generate a larger force than the traversing drive for forming the between the upper cheek tool and the lower cheek tool arranged workpiece comprises, and that the positioning drive is stationary during forming and blocked.

Der Vorteil der erfindungsgemäßen Lösung ist darin zu sehen, daß mit dem Verfahrantrieb eine schnelle Relativbewegung zwischen Oberwange und Unterwange erzeugbar ist, während der Kraftantrieb die zusätzliche Möglichkeit eröffnet, mit großen Kräften von Oberwangenwerkzeug und Unterwangenwerkzeug auf das Werkstück einzuwirken, um bei diesem ein Umformen durchführen zu können.The advantage of the solution according to the invention is the fact that with the traversing a fast relative movement between the upper beam and lower beam is generated while the power drive opens up the additional possibility to act with great forces of Oberwangenwerkzeug and lower beam tool on the workpiece to perform in this forming to be able to.

Unter dem Begriff Umformen ist dabei eine Formgebung eines Werkstücks unter Zusammenwirken von Oberwangenwerkzeug und Unterwangenwerkzeug zu verstehen. Ein derartiges Umformen umfaßt beispielsweise ein Schließen und Zusammendrücken von Umbiegungen oder Umschlägen, ein Einprägen von Sicken oder jegliche weitere Art von Umformvorgängen in Flachmaterialien.The term reshaping is to be understood as a shaping of a workpiece under the interaction of the upper cheek tool and the lower cheek tool. Such reshaping includes, for example, closing and compressing bends or envelopes, embossing beads or any other type of forming operations in flat materials.

Besonders günstig läßt sich der Kraftantrieb dann auslegen, wenn dieser bei der Erzeugung einer das Oberwangenwerkzeug und das Unterwangenwerkzeug aufeinanderzu bewegenden Kraft mit einer geringeren Verfahrgeschwindigkeit als der Fahrantrieb ausgebildet ist.The power drive can be interpreted particularly favorably if it is designed to produce a force that moves the upper beam tool and the lower beam tool toward one another at a lower travel speed than the traction drive.

Damit läßt sich insbesondere die Antriebsleistung für den Kraftantrieb trotz großer erzeugter Kraft klein halten und die schnellen, über große Verfahrwege laufenden Verfahrbewegungen können auf den Verfahrantrieb verlagert werden.Thus, in particular the drive power for the power drive can be kept small in spite of large power generated and the fast, over long travel paths traversing movements can be moved to the traversing drive.

Besonders günstig ist es, wenn die vom Kraftantrieb erzeugbare Kraft die von dem Fahrantrieb erzeugbare Kraft um einen Faktor von mindestens zwei, besser mindestens fünf, noch besser mindestens zehn übersteigt.It is particularly favorable if the force that can be generated by the power drive exceeds the force that can be generated by the travel drive by a factor of at least two, better at least five, even better at least ten.

Hinsichtlich der Anordnung des Antriebs relativ zur Oberwange und Unterwange wurden im Zusammenhang mit der bisherigen Erläuterung der Erfindung keine näheren Angaben gemacht. So sieht ein vorteilhaftes Ausführungsbeispiel vor, daß endseitig der Oberwange der mindestens eine jeweils einen Verfahrantrieb und einen Kraftantrieb umfassende Antrieb angeordnet ist.With regard to the arrangement of the drive relative to the upper beam and lower beam no further details have been made in connection with the previous explanation of the invention. Thus, an advantageous embodiment provides that the end of the upper beam of the at least one respective drive and a power drive comprehensive drive is arranged.

Dies könnte so ausgeführt sein, daß nur auf einer Seite der Oberwange und der Unterwange der Antrieb angeordnet ist. Besonders günstig ist es, wenn auf beiden Seiten der Oberwange und der Unterwange jeweils einer der erfindungsgemäßen Antriebe angeordnet ist.This could be carried out so that only on one side of the upper beam and the lower beam of the drive is arranged. It is particularly favorable if in each case one of the drives according to the invention is arranged on both sides of the upper beam and the lower beam.

Hinsichtlich der relativen Anordnung von Verfahrantrieb und Kraftantrieb zueinander wurden bislang keine näheren Angaben gemacht. Beispielsweise wäre es denkbar, den Kraftantrieb so anzuordnen, daß dieser in irgendeinem Teilbereich zwischen einer Wange und dem dieser Wange zugeordneten Werkzeug wirksam ist, während der Verfahrantrieb zur Relativbewegung der Oberwange und der Unterwange zueinander dient.With regard to the relative arrangement of travel drive and power drive to each other so far no details have been made. For example, it would be conceivable to arrange the power drive so that it is effective in any portion between a cheek and the tool associated with this cheek, while the traverse drive for relative movement of the upper beam and the lower beam to each other.

Besonders vorteilhaft ist es jedoch, wenn der Kraftantrieb und der Verfahrantrieb zu einer als Ganzes nur zwischen der Oberwange und der Unterwange wirksamen Antriebseinheit zusammengefaßt sind, so daß sowohl der Kraftantrieb als auch der Verfahrantrieb eine Relativbewegung zwischen der Oberwange und der Unterwange bewirken.It is particularly advantageous, however, if the power drive and the traversing drive are combined to form an effective as a whole only between the upper beam and the lower beam drive unit, so that both the power drive and the traverse drive cause a relative movement between the upper beam and the lower beam.

Wenn im Rahmen der vorliegenden Erfindung davon die Rede ist, daß die Antriebseinheit eine Relativbewegung der Oberwange zur Unterwange bewirkt, und dabei auf die Oberwange und die Unterwange wirkt, so ist damit nicht zwingend vorgesehen, daß die Antriebseinheit nur direkt und unmittelbar auf die Oberwange und die Unterwange einwirken muß. Vielfach ist eine der Wangen, insbesondere die Unterwange fest mit dem Maschinengestell verbunden. In einem derartigen Fall wirkt die Antriebseinheit ebenfalls im Sinne der Erfindung nur zwischen Oberwange und Unterwange, wenn die Antriebseinheit an dem Maschinengestell angreift, da dieses mit einer der Wangen fest verbunden ist und somit auch die Antriebseinheit zwischen dieser fest mit dem Maschinengestell verbundenen Wange und der beweglichen Wange verbunden ist.If in the present invention, it is mentioned that the drive unit causes a relative movement of the upper beam to the lower beam, and thereby acts on the upper beam and the lower beam, so it is not necessarily provided that the drive unit only directly and directly on the upper beam and the lower cheek must act. In many cases, one of the cheeks, in particular the lower cheek is firmly connected to the machine frame. In such a case, the drive unit also acts within the meaning of the invention only between the upper beam and lower beam when the drive unit engages the machine frame, since this is firmly connected to one of the cheeks and thus also the drive unit between this firmly connected to the machine frame cheek and the movable cheek is connected.

Hinsichtlich der Ausbildung des Verfahrantriebs selbst wurden keine näheren Angaben gemacht.With regard to the training of the drive itself, no details were given.

Um sicherzustellen, daß der Kraftantrieb wirksam werden kann, wenn der Verfahrantrieb nicht wirksam ist, und somit blockiert ist, sieht eine vorteilhafte Lösung vor, daß der Verfahrantrieb eine bei Stillstand wirksame Blockiereinrichtung umfaßt. Diese Blockiereinrichtung schafft die Möglichkeit, sicherzustellen, daß der Verfahrantrieb auf jeden Fall im Stillstand keinerlei Bewegung ausführt und somit die gesamte Kraft des Kraftantriebs wirksam werden kann.To ensure that the power drive can be effective when the travel drive is not effective, and thus blocked, provides a beneficial Solution that the traversing drive comprises a blocking device effective at standstill. This blocking device provides the opportunity to ensure that the traversing drive executes in any case at a standstill no movement and thus the entire force of the power drive can be effective.

Alternativ oder ergänzend zum Vorsehen einer Blockiereinrichtung sieht eine andere günstige Lösung vor, daß der Verfahrantrieb bei Stillstand durch Selbsthemmung blockiert ist. Diese Lösung hat den Vorteil, daß die Blockiereinrichtung entfallen kann oder zumindest dann, wenn sie noch aus Sicherheitsgründen vorhanden ist, so ausgelegt werden kann, daß sie geringere Kräfte aufnehmen muß.Alternatively or in addition to providing a blocking device provides another favorable solution that the traversing drive is blocked at standstill by self-locking. This solution has the advantage that the blocking device can be omitted or at least, if it is still available for security reasons, can be designed so that it has to absorb lower forces.

Hinsichtlich der Ausbildung des Verfahrantriebs wurden keine näheren Angaben gemacht. So sieht eine besonders günstige Lösung vor, daß der Verfahrantrieb als Spindelantrieb, umfassend eine Gewindespindel und eine Spindelmutter ausgebildet ist.With regard to the training of the traversing drive, no further details were given. Thus, a particularly favorable solution provides that the positioning drive is designed as a spindle drive, comprising a threaded spindle and a spindle nut.

Besonders günstig ist diese Lösung dann, wenn bei dieser die Spindelmutter durch einen Antriebsmotor antreibbar ist.This solution is particularly favorable if, in this case, the spindle nut can be driven by a drive motor.

Um eine Selbsthemmung im Bereich des Antriebs der Spindelmutter zu erzeugen sieht eine günstige Lösung vor, daß die Spindelmutter durch ein selbsthemmendes Getriebe angetrieben ist.To create a self-locking in the drive of the spindle nut provides a favorable solution that the spindle nut is driven by a self-locking gear.

Hinsichtlich der Ausbildung des Kraftantriebs wurden bislang keine näheren Angaben gemacht. So sieht eine besonders günstige Lösung vor, daß der Kraftantrieb als Hydraulikantrieb ausgebildet ist.With regard to the formation of the power drive so far no details have been made. Thus, a particularly favorable solution provides that the power drive is designed as a hydraulic drive.

Um den Hydraulikantrieb möglichst klein und kompakt zu bauen, ist vorzugsweise vorgesehen, daß der Hydraulikantrieb mehrere parallel wirkende Kolbenflächen umfaßt.To build the hydraulic drive as small and compact as possible, it is preferably provided that the hydraulic drive comprises a plurality of parallel piston surfaces.

Der Hydraulikantrieb könnte indirekt, das heißt über ein Zwischengetriebe wirksam sein, besonders günstig ist es jedoch, wenn der Hydraulikantrieb direkt wirkend in der Antriebseinheit angeordnet ist, das heißt, der Hydraulikantrieb selbst ohne Zwischengetriebe die Relativbewegung von Oberwange und Unterwange bewirkt.The hydraulic drive could indirectly, ie be effective via an intermediate gear, it is particularly favorable, however, if the hydraulic drive is arranged directly acting in the drive unit, that is, the hydraulic drive causes the relative movement of the upper beam and lower beam itself without intermediate gear.

Um den Hydraulikantrieb effizient betreiben zu können, ist vorzugsweise vorgesehen, daß ein Hydraulikaggregat des Hydraulikantriebs an einer der Wangen angeordnet ist.In order to operate the hydraulic drive efficiently, it is preferably provided that a hydraulic unit of the hydraulic drive is arranged on one of the cheeks.

Alternativ zum Vorsehen eines direkt wirkenden Hydraulikantriebs ist bei einem anderen bevorzugten Ausführungsbeispiel der erfindungsgemäßen Lösung vorgesehen, daß der Kraftantrieb ein Hebelgetriebe mit einem Antrieb für dieses umfaßt.As an alternative to providing a directly acting hydraulic drive is provided in another preferred embodiment of the inventive solution that the power drive comprises a lever mechanism with a drive for this.

Dabei kann der Antrieb für das Hebelgetriebe entweder einen Schwenkantrieb oder einen Linearantrieb sein. Es ist sogar denkbar als Linearantrieb einen pneumatisch oder hydraulisch betätigbaren Zylinder vorzusehen.The drive for the lever mechanism can be either a rotary actuator or a linear drive. It is even conceivable as a linear drive to provide a pneumatically or hydraulically actuated cylinder.

Hinsichtlich der Steuerung der erfindungsgemäßen Biegemaschine mit dem Verfahrantrieb und dem Kraftantrieb sind die unterschiedlichsten Lösungen denkbar.With regard to the control of the bending machine according to the invention with the travel drive and the power drive, the most diverse solutions are conceivable.

Beispielsweise wäre es denkbar, Verfahrantrieb und Kraftantrieb parallel einzusetzen. In diesem Fall wäre es jedoch erforderlich, den Verfahrantrieb selbsthemmend auszubilden, damit in jeder Stellung des Verfahrantriebs der Kraftantrieb mit der größeren Kraft wirksam werden kann.For example, it would be conceivable to use travel drive and power drive in parallel. In this case, however, it would be necessary to form the traversing drive self-locking, so that in each position of the traversing the power drive can be effective with the greater force.

Einfacher läßt sich die erfindungsgemäße Biegemaschine dann ausbilden, wenn eine Steuerung vorgesehen ist, die entweder den Verfahrantrieb oder den Kraftantrieb einsetzt, so daß insbesondere der Verfahrantrieb nicht unter Bedingungen arbeiten muß, in denen die größere Kraft des Kraftantriebs wirksam ist.The bending machine according to the invention can be formed more easily if a control is provided which uses either the travel drive or the power drive, so that in particular the travel drive does not have to work under conditions in which the greater force of the power drive is effective.

Um die vom Kraftantrieb erzeugbare große Kraft dosiert einsetzen zu können, ist vorzugsweise vorgesehen, daß die vom Kraftantrieb erzeugbare Kraft durch die Steuerung steuerbar ist, so daß der Einsatz der vollen Kraft des Kraftantriebs dosiert nur bei den jeweiligen entsprechenden Bearbeitungsvorgängen erfolgen kann.In order to use the large force generated by the power drive metered, it is preferably provided that the force generated by the power drive can be controlled by the controller, so that the use of the full force of the power drive can be dosed only at the respective corresponding processing operations.

Eine besonders vorteilhafte Lösung sieht dabei vor, daß die Steuerung den Kraftantrieb abhängig von dem jeweiligen Bearbeitungsvorgang einsetzt.A particularly advantageous solution provides that the controller uses the power drive depending on the particular machining operation.

Damit wäre beispielsweise die Möglichkeit gegeben, bei normalen Biegeoperationen mit einer Biegewange, bei welchen das Werkstück lediglich zwischen Oberwangenwerkzeug und Unterwangenwerkzeug eingespannt, das heißt fixiert, werden soll, die Fixierung mit dem eine ausreichende Kraft erzeugenden Verfahrantrieb vorzunehmen, so daß hierzu der Kraftantrieb gar nicht eingesetzt werden muß.This would, for example, given the possibility of normal bending operations with a bending cheek, in which the workpiece is clamped only between Oberwangenwerkzeug and lower cheek tool, that is fixed, is to make the fixation with the sufficient force generating traverse drive, so that the power drive not at all must be used.

In diesem Fall wird dann der Kraftantrieb lediglich in den Fällen eingesetzt, in denen durch das Oberwangenwerkzeug und das Unterwangenwerkzeug eine Umformung des Werkstücks, also beispielsweise ein Biegen eines Umschlags, ein Schließen eines Umschlags oder jegliche Art von weiteren Umformverfahren durchgeführt werden soll.In this case, the power drive is then used only in those cases in which a deformation of the workpiece, so for example a bending of an envelope, closing an envelope or any kind of further forming process is to be performed by the upper cheek and the lower cheek tool.

Um jedoch den Steuerungsaufwand nicht allzu komplex zu machen, ist bei einem anderen vorteilhaften Ausführungsbeispiel einer erfindungsgemäßen Biegemaschine vorgesehen, daß die Steuerung beim Einspannen des Werkstücks zum Biegen desselben mittels der Biegewange abschließend den Kraftantrieb einsetzt, so daß der Kraftantrieb stets die letztlich auf das Werkstück wirkende Kraft erzeugt.However, in order not to make the control effort too complex, another advantageous embodiment of a bending machine according to the invention is provided that the control during clamping of the workpiece for bending the same by means of the bending beam finally uses the power drive, so that the power drive always acting ultimately on the workpiece Force generated.

Alternativ oder ergänzend dazu ist vorgesehen, daß die Steuerung bei jedem Beaufschlagen des Werkstücks mittels des Oberwangenwerkzeugs und des Unterwangenwerkzeugs zu einer Bearbeitung des Werkstücks abschließend den Kraftantrieb einsetzt und somit in jedem Fall für die Bearbeitung die vom Kraftantrieb erzeugbare Kraft ausgenutzt werden kann.Alternatively or additionally, it is provided that the control of each application of the workpiece by means of the Oberwangenwerkzeugs and the lower beam tool to a processing of the workpiece finally uses the power drive and thus in each case for processing the producible by the power drive force can be exploited.

Weitere Merkmale der Erfindung sind Gegenstand der nachfolgenden Beschreibung sowie der zeichnerischen Darstellung einiger Ausführungsbeispiele.Further features of the invention are the subject of the following description and the drawings of some embodiments.

In der Zeichnung zeigen:

Figur 1
eine perspektivische Frontansicht einer erfindungsgemäßen Biegemaschine;
Figur 2
einen Schnitt längs Linie 2-2 in Figur 1;
Figur 3
einen Schnitt längs Linie 3-3 in Figur 1 bei einem ersten Ausführungsbeispiel einer erfindungsgemäßen Biegemaschine;
Figur 4
eine vergrößerte Darstellung eines Bereichs A in Figur 3;
Figur 5
eine ausschnittsweise Darstellung eines ersten Beispiels eines Umformens anhand eines Schnitts ähnlich Figur 3 im Bereich von Oberwangenwerkzeug und Unterwangenwerkzeug;
Figur 6
eine Darstellung ähnlich Figur 5 eines zweiten Beispiels eines Umformens;
Figur 7
einen Schnitt ähnlich Figur 3 durch ein zweites Ausführungsbeispiel einer erfindungsgemäßen Biegemaschine und
Figur 8
einen Schnitt ähnlich Figur 3 durch ein drittes Ausführungsbeispiel einer erfindungsgemäßen Biegemaschine.
In the drawing show:
FIG. 1
a front perspective view of a bending machine according to the invention;
FIG. 2
a section along line 2-2 in Figure 1;
FIG. 3
a section along line 3-3 in Figure 1 in a first embodiment of a bending machine according to the invention;
FIG. 4
an enlarged view of a region A in Figure 3;
FIG. 5
a partial representation of a first example of a reshaping based on a section similar to Figure 3 in the range of upper cheek and lower cheek tool;
FIG. 6
a representation similar to Figure 5 of a second example of a reshaping;
FIG. 7
a section similar to Figure 3 by a second embodiment of a bending machine according to the invention and
FIG. 8
a section similar to Figure 3 by a third embodiment of a bending machine according to the invention.

Ein Ausführungsbeispiel einer erfindungsgemäßen Biegemaschine, dargestellt in Figur 1, umfaßt ein als Ganzes mit 10 bezeichnetes Maschinengestell, mit seitlichen Ständern 12 und 14, zwischen denen sich, wie in Figur 2 dargestellt, eine Oberwange 16 und eine Unterwange 18 erstrecken.An embodiment of a bending machine according to the invention, shown in Figure 1, comprises a generally designated 10 machine frame, with lateral uprights 12 and 14, between which, as shown in Figure 2, a top cheek 16 and a bottom cheek 18 extend.

Beispielsweise ist die Unterwange 18 fest mit den Ständern 12 und 14 verbunden, während die Oberwange 16 relativ zur Unterwange 18 bewegbar ist.For example, the lower beam 18 is fixedly connected to the uprights 12 and 14, while the upper beam 16 is movable relative to the lower beam 18.

Darüber hinaus trägt die Oberwange 16 ein Oberwangenwerkzeug 20 und die Unterwange 18 ein Unterwangenwerkzeug 22, zwischen denen ein Werkstück 24 aus Flachmaterial, beispielsweise aus Blech, so einspannbar ist, daß von diesem ein über das Oberwangenwerkzeug 20 und das Unterwangenwerkzeug 22 überstehender Lappen aus einer durch das Unterwangenwerkzeug 22 und das Oberwangenwerkzeug 20 festlegbaren Ebene 28 herausbiegbar ist.In addition, the upper beam 16 carries a Oberwangenwerkzeug 20 and the lower cheek 18 a lower cheek tool 22, between which a workpiece 24 made of flat material, such as sheet metal, so clamped that from this on the Oberwangenwerkzeug 20 and the lower cheek tool 22 protruding cloth from a through the lower cheek tool 22 and the Oberwangenwerkzeug 20 fixable plane 28 is herausbiegbar.

Hierzu ist die Biegemaschine mit einer Biegewange 30 versehen, die sich zwischen endseitig derselben angeordneten Biegewangenhaltern 32 erstreckt und mit diesen Biegewangenhaltern 32 um eine Schwenkachse 34 bewegbar ist, wobei die Schwenkachse 34 vorzugsweise über der Einspannebene 28 liegt.For this purpose, the bending machine is provided with a bending cheek 30 which extends between the end of the same arranged bending cheek holders 32 and with these bending cheek holders 32 is movable about a pivot axis 34, wherein the pivot axis 34 is preferably above the clamping plane 28.

Die Biegewange wirkt dabei mit einem Biegewangenwerkzeug 36 auf den umzubiegenden Lappen 26 des Werkstücks zum Biegen ein, wobei die gesamte Biegewange 30 um die Schwenkachse 34 schwenkbar ist.The bending cheek acts with a bending beam tool 36 on the fold over tab 26 of the workpiece for bending, wherein the entire bending cheek 30 is pivotable about the pivot axis 34.

Um die Oberwange 16 relativ zur Unterwange 18 in einer Bewegungsrichtung 40 zu verfahren, so daß das Werkstück 24 entweder von der Oberwange 16 mit dem Oberwangenwerkzeug 20 beaufschlagt und gegen die Unterwange 18 mit dem Unterwangenwerkzeug 22 gedrückt wird oder das Werkstück 24 zwischen der von der Unterwange 18 abgehobenen Oberwange 16 und der Unterwange 18 frei beweglich ist, ist die erfindungsgemäße Biegemaschine mit einem von einer Steuerung 42 steuerbaren Antrieb, umfassend zwei Antriebseinheiten 46 und 48 versehen, die jeweils in Endbereichen 52 und 54 der Oberwange 16 und der Unterwange 18 angeordnet sind, und eine Relativbewegung zwischen der Oberwange 16 und der Unterwange 18, im beispielhaft dargestellten Fall ein Abheben der Oberwange 16 mit dem Oberwangenwerkzeug 20 vom auf der Unterwange 18 mit dem Unterwangenwerkzeug 22 aufliegenden Werkstück 24 oder ein Beaufschlagen des Werkstücks 24 mit dem Oberwangenwerkzeug 20 gegen das Unterwangenwerkzeug 22 bewirken.To move the upper beam 16 relative to the lower beam 18 in a direction of movement 40, so that the workpiece 24 is acted upon either by the upper beam 16 with the Oberwangenwerkzeug 20 and pressed against the lower beam 18 with the lower beam tool 22 or the workpiece 24 between the lower cheek 18 raised upper beam 16 and the lower beam 18 is free to move, the bending machine according to the invention is provided with a controllable by a controller 42 drive, comprising two drive units 46 and 48, each in end portions 52 and 54 of the Upper cheek 16 and the lower cheek 18 are arranged, and a relative movement between the upper cheek 16 and the lower cheek 18, in the example illustrated lifting the upper jaw 16 with the Oberwangenwerkzeug 20 from lying on the lower cheek 18 with the lower cheek tool 22 workpiece 24 or applying the Workpiece 24 with the upper beam tool 20 against the lower beam tool 22 effect.

Bei einem ersten Ausführungsbeispiel einer erfindungsgemäßen Biegemaschine, dargestellt in Figur 3, umfaßt jede der Antriebseinheiten, in diesem Fall die dargestellte Antriebseinheit 46 einen Verfahrantrieb 56 und einen Kraftantrieb 58, die beide direkt miteinander gekoppelt sind, so daß die Antriebseinheit 46 einerseits auf ein Lagerelement 62 wirkt, das fest mit der Oberwange 16 verbunden ist und andererseits über ein fest mit der Unterwange 18 verbundenes Lagerelement 64 auf die Unterwange 18 wirkt.In a first exemplary embodiment of a bending machine according to the invention, illustrated in FIG. 3, each of the drive units, in this case the illustrated drive unit 46, comprises a travel drive 56 and a power drive 58, which are both directly coupled to each other, so that the drive unit 46 on the one hand bears on a bearing element 62 acts, which is fixedly connected to the upper beam 16 and on the other hand acts on the lower beam 18 via a fixedly connected to the lower beam 18 bearing member 64.

Die Antriebseinheit 46 ist dabei so aufgebaut, daß sowohl der Verfahrantrieb 56 als auch der Kraftantrieb 58 entweder wechselweise oder gemeinsam auf das Lagerelement 62 und auf das Lagerelement 64 wirken, je nach dem, wie diese von der Steuerung 42 angesteuert werden.The drive unit 46 is constructed so that both the travel drive 56 and the power drive 58 either alternately or jointly act on the bearing element 62 and on the bearing element 64, depending on how they are controlled by the controller 42.

Bei dem ersten, in Figur 3 dargestellten Ausführungsbeispiel umfaßt der Verfahrantrieb 56 eine unverdrehbar gehaltene Gewindespindel 66, welche sich mit ihrer Längsachse 68 quer zur Einspannebene 28 erstreckt und dabei eine Spindelmutter 70 durchsetzt, die in Richtung der Längsachse 68 der Gewindespindel 66 durch zwei Lager 72 und 74 unverschiebbar, jedoch um die Längsachse 68 drehbar in dem als Lagergehäuse ausgebildeten Lagerelement 64 gehalten ist.In the first embodiment shown in Figure 3, the traversing drive 56 comprises a non-rotatably held threaded spindle 66, which extends transversely to the clamping plane 28 with its longitudinal axis 68 and thereby passes through a spindle nut 70 in the direction of the longitudinal axis 68 of the threaded spindle 66 by two bearings 72nd and 74 immovably, but is rotatably held about the longitudinal axis 68 in the bearing housing 64 designed as a bearing element 64.

Ein Antreiben der Spindelmutter 70 und somit eine Drehung derselben relativ zur Gewindespindel 66 bewirkt nun eine Verschiebung der Gewindespindel 66 in Richtung ihrer Längsachse 68 und somit in Richtung der Oberwange 16 oder von der Oberwange 16 weg.Driving the spindle nut 70 and thus a rotation thereof relative to the threaded spindle 66 now causes a displacement of the threaded spindle 66 in the direction of its longitudinal axis 68 and thus in the direction of the upper beam 16 or away from the upper beam 16.

Zum drehbaren Antreiben der Spindelmutter 70 ist diese umfangsseitig mit einer Außenverzahnung 76 versehen, in welche eine Schnecke 78 eingreift, so daß die Schnecke 78 und die Außenverzahnung 76 ein Schneckengetriebe bilden.For rotatably driving the spindle nut 70, this is peripherally provided with an outer toothing 76, in which a worm 78 engages, so that the worm 78 and the outer toothing 76 form a worm gear.

Die Schnecke 78 ist dabei durch eine gemeinsame Antriebswelle 80 antreibbar, die sich zwischen den beiden Antriebseinheiten 46 und 48 erstreckt und ihrerseits über ein Untersetzungsgetriebe 82 durch einen Motor 84 anteibbar ist, so daß stets die Spindelmuttern 70 beider Antriebseinheiten 46 und 48 synchron zueinander über den Motor 84 angetrieben werden können.The worm 78 is driven by a common drive shaft 80 which extends between the two drive units 46 and 48 and in turn via a reduction gear 82 by a motor 84 anteibbar so that always the spindle nuts 70 both drive units 46 and 48 synchronously to each other via the Motor 84 can be driven.

Der gesamte Verfahrantrieb 56, das heißt die Gesamtheit aus Gewindespindel 66, Spindelmutter 70, Schneckengetriebe 76, 78, Untersetzungsgetriebe 82 und Motor 84 ist so ausgebildet, daß sie bei Stillstand des Motors 84 aufgrund der Selbsthemmung eine Bewegung der Gewindespindel 66 in Richtung ihrer Längsachse 68 blockiert.The entire travel drive 56, that is, the totality of threaded spindle 66, spindle nut 70, worm gear 76, 78, reduction gear 82 and motor 84 is formed so that it at standstill of the motor 84 due to the self-locking movement of the threaded spindle 66 in the direction of its longitudinal axis 68th blocked.

Die Gewindespindel 66 ist mit einem Ende 88, vorzugsweise mit dem der Oberwange 16 zugewandten Ende 88, fest mit einer Kolbenstange 92 eines Dreifachkolbens 94 verbunden, welcher, wie in Figur 3 und 4 drei in Richtung einer Längsachse 96 der Kolbenstange 92 aufeinanderfolgend angeordnete ringförmige Kolbenflächen 102, 104, 106 umfaßt, denen zugewandt Zylinderkammern 112, 114, 116 in einem Zylindergehäuse 118 angeordnet sind, wobei den Zylinderkammern 112, 114, 116 über einen Verteilkanal 120 im Zylindergehäuse 118 gleichzeitig Hydraulikmedium zuführbar ist, so daß durch Beaufschlagung der Kolbenflächen 102, 104, 106 bei kleiner Bauweise des Kraftantriebs 58 eine große Kraft erzeugbar ist.The threaded spindle 66 is connected to one end 88, preferably with the upper cheek 16 end facing 88, fixed to a piston rod 92 of a triple piston 94, which, as in Figure 3 and 4 three in the direction a longitudinal axis 96 of the piston rod 92 successively arranged annular piston surfaces 102, 104, 106, which facing cylinder chambers 112, 114, 116 are arranged in a cylinder housing 118, wherein the cylinder chambers 112, 114, 116 via a distribution channel 120 in the cylinder housing 118 simultaneously fed hydraulic medium is, so that by applying the piston surfaces 102, 104, 106 in small construction of the power drive 58, a large force can be generated.

Die Speisung der Zylinderkammern 112, 114, 116 erfolgt durch ein Hydraulikaggregat 122, welches vorzugsweise an der Oberwange 16 sitzend angeordnet ist und durch die Steuerung 42 ansteuerbar ist, um unter Druck stehendes Hydraulikmedium zur Bewegung des Kolbens 94 relativ zum Zylindergehäuse 118 zu erzeugen.The supply of the cylinder chambers 112, 114, 116 is effected by a hydraulic unit 122, which is preferably seated on the upper cheek 16 and can be controlled by the controller 42 to produce pressurized hydraulic medium for movement of the piston 94 relative to the cylinder housing 118.

Das Zylindergehäuse 118 sitzt seinerseits auf dem fest mit der Oberwange 16 verbundenen Lagerelement 62, und zwar auf einer der Unterwange 18 abgewandten Seite desselben, so daß eine Beaufschlagung der Zylinderkammern 112, 114, 116 mit Hydraulikmedium dazu führt, daß das Zylindergehäuse 118 auf das Lagerelement 62 wirkt und dieses mitsamt der Oberwange 16 in Richtung der Unterwange 18 beaufschlagt und somit das Zylindergehäuse 118 relativ zur Kolbenstange 92 in Richtung der Unterwange 18 verschiebt.The cylinder housing 118 is in turn seated on the fixedly connected to the upper beam 16 bearing member 62, and the same on a lower cheek 18 side facing away, so that an admission of the cylinder chambers 112, 114, 116 with hydraulic medium causes the cylinder housing 118 on the bearing element 62 acts and this is acted upon together with the upper beam 16 in the direction of the lower beam 18 and thus the cylinder housing 118 moves relative to the piston rod 92 in the direction of the lower beam 18.

Ferner ist auf einer dem Zylindergehäuse 118 gegenüberliegenden Seite des Lagerelements 62 ein Tellerfederpaket 124 vorgesehen, welches sich einerseits am Lagerelement 62 und andererseits an einem Auflagering 126 abstützt, der gleichzeitig eine Verbindung zum Ende 88 der Spindel 66 darstellt.Further, on a side facing the cylinder housing 118 side of the bearing member 62, a plate spring package 124 is provided, which is supported on the one hand on the bearing element 62 and on the other hand to a support ring 126, which simultaneously represents a connection to the end 88 of the spindle 66.

Das Tellerfederpaket 124 bewirkt, daß sich das Lagerelement 62 mitsamt der Oberwange 16 in Richtung von der Unterwange 18 weg bewegt, wenn die Zylinderkammern 112, 114, 116 drucklos sind und sich somit das Zylindergehäuse 118 gegen den Kolben 94 in Richtung von der Unterwange 18 weg bewegen kann.The plate spring assembly 124 causes the bearing member 62 moves together with the upper beam 16 in the direction of the lower beam 18 away when the cylinder chambers 112, 114, 116 are depressurized and thus the cylinder housing 118 against the piston 94 in the direction of the lower beam 18 away can move.

Das Tellerfederpaket 124 ist dabei so dimensioniert, daß ohne Druckbeaufschlagung der Zylinderkammern 112, 114, 116 das Zylindergehäuse 118 bis zu einem mechanischen Anschlag in Richtung von der Unterwange 18 weg verschoben ist.The cup spring package 124 is dimensioned so that the cylinder housing 118 is displaced away from the lower beam 18 up to a mechanical stop without pressurizing the cylinder chambers 112, 114, 116.

Darüber hinaus erfolgt beispielsweise eine drehfeste Festlegung der Gewindespindel 66 relativ zur Oberwange 16 durch Kraftschluß über das vorgespannte Tellerfederpaket 124, welches die Einheit aus Auflagering 126, Kolbenstange 92 und Gewindespindel 66 drehfest gegenüber dem Lager 62 fixiert.In addition, for example, a rotationally fixed fixing of the threaded spindle 66 relative to the upper beam 16 by frictional engagement on the prestressed cup spring package 124 which rotatably fixes the unit of Auflagering 126, piston rod 92 and threaded spindle 66 relative to the bearing 62.

Bei der erfindungsgemäßen Lösung besteht nun die Möglichkeit, mittels des Verfahrantriebs 56 die Oberwange 16 und die Unterwange 18 relativ zueinander sehr schnell zu bewegen, beispielsweise in der Größenordnung von 50 bis 100 mm/sek., wobei dieser Verfahrantrieb 56 nicht die Möglichkeit hat, große Kräfte aufzubringen, so daß keine große Kraft zwischen dem Oberwangenwerkzeug 20 und dem Unterwangenwerkzeug 22 erzeugbar ist.In the solution according to the invention, it is now possible by means of the travel drive 56, the upper beam 16 and the lower beam 18 to move relative to each other very quickly, for example in the order of 50 to 100 mm / sec., This travel drive 56 does not have the ability to large Apply forces so that no great force between the upper beam tool 20 and the lower beam tool 22 can be generated.

Die Kraft ist jedoch beispielsweise bei vielen Biegeoperationen mittels der Biegewange 30 ausreichend, um das Werkstück 24 einzuspannen.However, the force is sufficient, for example, in many bending operations by means of the bending cheek 30 to clamp the workpiece 24.

Sind große Kräfte erforderlich, so kann der Kraftantrieb 58 eingesetzt werden, welcher in der Lage ist, eine Kraft zu erzeugen, die diejenige des Verfahrantriebs 56 um mehr als das zweifache, noch besser das fünffache, vorzugsweise mehr als das zehnfache übersteigt. Allerdings erlaubt der Kraftantrieb 58 lediglich Geschwindigkeiten der Relativbewegung zwischen der Oberwange 16 und der Unterwange 18 im Bereich von einigen Millimetern pro Sekunde oder weniger.If large forces are required, then the power drive 58 can be used, which is able to generate a force which exceeds that of the travel drive 56 by more than twice, more preferably five times, preferably more than ten times. However, the power drive 58 only allows speeds of relative movement between the upper beam 16 and the lower beam 18 in the range of a few millimeters per second or less.

Die vielfach höhere Kraft, die mit dem Kraftantrieb 58 erzeugbar ist, bietet jedoch den Vorteil, mit der Biegemaschine, wie in Figur 5 oder Figur 6 dargestellt, auch zusätzliche Operationen, beispielsweise ein Umformen des Werkstücks, zu realisieren. Beispielsweise besteht die Möglichkeit, wie in Figur 5 dargestellt, zwischen dem Oberwangenwerkzeug 20 und dem Unterwangenwerkzeug 22 eine Umbiegung des Werkstücks 24, das heißt einen auf das Werkstück 24 über einen Bereich 25 umgebogenen Lappen 26 zusammenzupressen und somit einen sogenannten geschlossenen Umschlag ohne Hohlraum zwischen dem Lappen 26 und dem Bereich 25 des Werkstücks 24 zu erzeugen.However, the much higher force which can be generated with the power drive 58 offers the advantage of also implementing additional operations, for example forming of the workpiece, with the bending machine, as shown in FIG. 5 or FIG. For example, it is possible, as shown in FIG. 5, to compress a bend of the workpiece 24 between the upper cheek tool 20 and the lower cheek tool 22, that is to say a tab 26 bent over the workpiece 24 over a region 25 and thus a so-called closed envelope without a cavity between the two Lobe 26 and the region 25 of the workpiece 24 to produce.

Andererseits besteht aber auch, wie in Figur 6 dargestellt, beispielsweise die Möglichkeit, durch geeignete Formgebung von Oberwangenwerkzeug 20 und Unterwangenwerkzeug 22 in das Werkstück 24 beispielsweise eine Sicke 23 mittels des Kraftantriebs 58 einzuprägen.On the other hand, however, there is also, as shown in Figure 6, for example, the ability to impress by suitable shaping of Oberwangenwerkzeug 20 and lower beam tool 22 in the workpiece 24, for example, a bead 23 by means of the power drive 58.

Der Einsatz des Kraftantriebs 58 erfolgt im einfachsten Fall stets bei stillstehendem Verfahrantrieb 56, wobei durch die Kraft des Kraftantriebs 58 keine Rückwirkung auf den Verfahrantrieb 56 dahingehend, daß sich dieser ebenfalls verstellen würde, erfolgt, da - wie bereits dargelegt - der Verfahrantrieb 56 selbsthemmend ausgebildet ist.The use of the power drive 58 is always carried out in the simplest case with stationary positioning drive 56, wherein by the force of the power drive 58 no Reaction to the travel drive 56 to the effect that this would also be adjusted takes place because - as already stated - the positioning drive 56 is designed to be self-locking.

Prinzipiell wäre es bei selbsthemmender Ausbildung des Verfahrantriebs 56 auch denkbar, parallel zum Verfahrantrieb, beispielsweise während des Beaufschlagens des Werkstücks 24 durch das Oberwangenwerkzeug 20, um dieses gegen das Unterwangenwerkzeug 22 zu drücken, zusätzlich zum Verfahrantrieb 56 auch gleichzeitig den Kraftantrieb 58 anlaufen zu lassen, dies würde jedoch aufgrund der Kraftwirkung des Kraftantriebs 58 dazu führen, daß der Verfahrantrieb 56 bei voller Kraftentfaltung des Kraftantriebs 58 blockiert und somit der Motor 84 ebenfalls blockiert.In principle, it would also be conceivable, in the case of a self-locking design of the travel drive 56, parallel to the travel drive, for example during the loading of the workpiece 24 by the upper beam tool 20, to press it against the lower beam tool 22, in addition to the travel drive 56 also simultaneously start the power drive 58, However, this would cause due to the force of the power drive 58 to the fact that the carriage 56 blocked at full power deployment of the power drive 58 and thus the engine 84 also blocked.

Ferner ist es bei einer besonderen Ausführungsform der erfindungsgemäßen Lösung ebenfalls denkbar, das Hydraulikaggregat 122 so auszubilden, daß über dieses die vom Kraftantrieb 58 erzeugte Kraft dosiert und gesteuert vorgebbar ist, so daß je nach Art der Bearbeitung des Werkstücks 24 unterschiedliche vom Kraftantrieb 58 erzeugte Kräfte eingesetzt werden können.Furthermore, it is also conceivable in a particular embodiment of the solution according to the invention, the hydraulic unit 122 in such a way that dosed over this the force generated by the power drive 58 and controlled predetermined, so that depending on the type of machining of the workpiece 24 different forces generated by the power drive 58 can be used.

Beispielsweise wäre es denkbar, geringere Kräfte seitens des Kraftantriebs 58 dann aufzubringen, wenn lediglich ein Einspannen des Werkstücks 24 zwischen dem Oberwangenwerkzeug 20 und dem Unterwangenwerkzeug 22 erfolgen soll, während größere Kräfte dann aufgebracht werden, wenn anstelle des Einspannens des Werkstücks 24 ein Umformen des Werkstücks 24 durch Einwirkung des Oberwangenwerkzeugs 20 und des Unterwangenwerkzeugs 22 erfolgen soll.For example, it would be conceivable to apply lower forces on the part of the power drive 58 if only a clamping of the workpiece 24 between the upper beam tool 20 and the lower beam tool 22 should be done while larger forces are then applied, if instead of clamping the workpiece 24, a forming of the workpiece 24 should take place by the action of the Oberwangenwerkzeugs 20 and the lower cheek tool 22.

Bei einem zweiten Ausführungsbeispiel einer erfindungsgemäßen Biegemaschine, dargestellt in Fig. 7, ist bei der Antriebseinheit 46' der Verfahrantrieb 56 in gleicher Weise ausgebildet wie beim ersten Ausführungsbeispiel. Im Gegensatz dazu ist der Kraftantrieb 58' nicht als direkt wirkender hydraulischer Antrieb ausgebildet, sondern als Hebelgetriebe 130 mit einem langen Hebel 132 und einem kurzen Hebel 134, wobei ausgehend von einem gemeinsamen gelenkigen Verbindungspunkt 136 der lange Hebel 132 mit einem Gelenk 138 mit der Oberwange 16 verbunden ist, während der kurze Hebel über ein Gelenk 140 mit einer Kraftübertragungsstange 142 verbunden ist, die ihrerseits wiederum mit dem Ende 88 der Gewindespindel 66 in Verbindung steht.In a second embodiment of a bending machine according to the invention, shown in Fig. 7, in the drive unit 46 'of the positioning drive 56 is formed in the same manner as in the first embodiment. In contrast, the power drive 58 'is not formed as a direct-acting hydraulic drive, but as a lever gear 130 with a long lever 132 and a short lever 134, starting from a common articulated connection point 136 of the long lever 132 with a hinge 138 with the upper beam 16 is connected, while the short lever is connected via a hinge 140 with a power transmission rod 142, which in turn is in communication with the end 88 of the threaded spindle 66.

Durch Verschieben des gemeinsamen Anlenkpunkts 136 in Richtung eines Totpunkts und von diesem weg läßt sich somit der Abstand zwischen den Gelenkpunkten 138 und 140 variieren und somit ebenfalls eine große Kraft zur Bewegung der Oberwange 16 relativ zur Unterwange 18 erzeugen.By shifting the common pivot point 136 in the direction of a dead center and away from it, thus, the distance between the hinge points 138 and 140 can be varied and thus also generate a large force to move the upper beam 16 relative to the lower beam 18.

Hierzu ist zum Bewegen des Gelenkpunkts 136 ein Linearantrieb 142 vorgesehen, welcher beispielsweise ein Hydraulikantrieb sein kann, alternativ dazu aber auch ein Spindelantrieb. Der Linearantrieb 142 ist seinerseits über ein Gelenkpunkt 144 ebenfalls mit der Oberwange 16 verbunden und somit mit dieser mitbewegbar.For this purpose, a linear drive 142 is provided for moving the pivot point 136, which may be, for example, a hydraulic drive, but alternatively also a spindle drive. The linear drive 142 is in turn connected via a hinge point 144 also connected to the upper beam 16 and thus mitbewegbar with this.

Bei einem dritten Ausführungsbeispiel einer erfindungsgemäßen Biegemaschine, dargestellt in Fig. 8, umfaßt jede der Antriebseinheiten in diesem Fall die Antriebseinheit 46", einen Kraftantrieb 58, der dem des ersten Ausführungsbeispiels entspricht, während der Verfahrantrieb 56' durch einen Hydraulikzylinder 150 gebildet ist, welcher durch ein Hydraulikaggregat 152 gespeist werden kann, um die Oberwange 16 von der Unterwange 18 weg nach oben und unten zu fahren.In a third embodiment of a bending machine according to the invention, shown in Fig. 8, each of the drive units in this case comprises the drive unit 46 ", a power drive 58, which corresponds to that of the first embodiment, while the traversing drive 56 'by a Hydraulic cylinder 150 is formed, which can be fed by a hydraulic unit 152 to drive the upper beam 16 away from the lower beam 18 up and down.

Um bei Stillstand des Hydraulikzylinders 150 den Kraftantrieb 58 einsetzen zu können, muß der Hydraulikzylinder 150 ebenfalls die von dem Kraftantrieb 58 aufgebrachten Kräfte aufnehmen können. Da dies mit dem Hydraulikzylinder 150 allein problematisch zu realisieren ist, ist der Verfahrantrieb 56' mit einer Blockiereinrichtung 154 versehen. Diese umfaßt einerseits eine als Verlängerung einer Kolbenstange 156 des Hydraulikzylinders 150 angeordnete verzahnte Stange 158 und zwei in einem von der verzahnten Stange 158 durchsetzten Gehäuse 160 angeordnete frontseitig verzahnte Haltebacken 162 und 164, die über Druckkammern 166 bzw. 168 in Richtung der verzahnten Stange 158 oder von dieser weg bewegbar sind, wobei die Haltebacken 162 und 164 im zur verzahnten Stange 158 hin beaufschlagten Zustand formschlüssig in diese eingreifen.In order to use the power drive 58 at standstill of the hydraulic cylinder 150, the hydraulic cylinder 150 must also be able to absorb the forces applied by the power drive 58. Since this alone is problematic to realize with the hydraulic cylinder 150, the travel drive 56 'is provided with a blocking device 154. This comprises on the one hand a toothed rod 158 arranged as an extension of a piston rod 156 of the hydraulic cylinder 150 and two frontally toothed holding jaws 162 and 164 arranged in a housing 160 interspersed by the toothed rod 158, which are connected via pressure chambers 166 and 168 in the direction of the toothed rod 158 or 158 be moved away from the latter, wherein the holding jaws 162 and 164 engage positively in the state acted upon for the toothed rod 158 in this state.

Sobald der Hydraulikzylinder 150 stillgesetzt wird, werden daher die Haltebacken 162 und 164 von dem Hydraulikaggregat 152 gegen die verzahnte Stange 158 gepresst und legen diese somit formschlüssig zum Gehäuse 160 und somit zur Unterwange 18 fest.As soon as the hydraulic cylinder 150 is stopped, therefore, the holding jaws 162 and 164 are pressed by the hydraulic unit 152 against the toothed rod 158 and thus form-fit them to the housing 160 and thus to the lower cheek 18.

Soll der Verfahrantrieb bewegt werden, so wird die Druckbeaufschlagung der Haltebacken 162 und 164 gelöst und somit auch die formschlüssige Festlegung der verzahnten Stange 158 relativ zur Unterwange 18, so daß durch Beaufschlagung des Hydraulikzylinders 150 der Verfahrantrieb 56' arbeiten kann.If the traversing drive to be moved, the pressurization of the holding jaws 162 and 164 is released and thus the positive locking of the toothed rod 158 relative to the lower beam 18, so that by acting on the hydraulic cylinder 150 of the drive 56 'can work.

Vorzugsweise ist das Hydraulikaggregat 152 so betrieben, daß dieses stets zwangsläufig bei Stillstand des Hydraulikzylinders 150 die Blockiereinrichtung 154 aktiviert und somit der Verfahrantrieb 56' selbständig bei Stillstand des Hydraulikzylinders 150 gegen eine Bewegung blockiert wird, so daß der Verfahrantrieb 56' bei Stillstand stets in der Lage ist, die von dem Kraftantrieb 58 gegebenenfalls erzeugten Kräfte aufzunehmen.Preferably, the hydraulic unit 152 is operated so that it always inevitably at standstill of the hydraulic cylinder 150, the blocking device 154 is activated and thus the traverse drive 56 'is automatically blocked at standstill of the hydraulic cylinder 150 against movement, so that the traversing drive 56' at standstill always in the It is able to absorb the forces that may be generated by the power drive 58.

Sowohl beim zweiten als auch beim dritten Ausführungsbeispiel kann der Betrieb der Verfahrantriebe 56, 56' sowie der Kraftantriebe 58, 58' in gleicher Weise wie beim ersten Ausführungsbeispiel mittels der Steuerung 42 erfolgen, so daß diesbezüglich vollinhaltlich auf die Ausführungen zum ersten Ausführungsbeispiel Bezug genommen wird.Both in the second and in the third embodiment, the operation of the traversing drives 56, 56 'and the power drives 58, 58' in the same manner as in the first embodiment by means of the controller 42, so that in this regard is fully taken to the comments on the first embodiment ,

Claims (21)

  1. Bending machine comprising a machine frame (10), a bending beam (30) having a bending beam tool (36) which is pivotable about a pivot axis (34) in order to bend over a strip (26) of a workpiece (24) of flat material, an upper beam (16) having an upper beam tool (20) and a lower beam (18) having a lower beam tool (22), the upper beam (16) and the lower beam (18) being disposed such that they can move relative to one another on the machine frame (10), and at least one drive (46, 48) for moving the upper beam tool (20) and the lower beam tool (22) towards one another in order to clamp the workpiece (24) made from flat material and located between the two beams in order to bend the strip by means of the bending beam (30), characterized in that the at least one drive (46, 48) comprises at least one displacement drive (56) for generating an opening and closing movement of the upper beam (16) and the lower beam (18) relative to one another and at least one force drive (58) for generating a greater force than the displacement drive (56) in order to deform the workpiece (24) disposed between the upper beam tool (20) and the lower beam tool (22), and in that the displacement drive (56) is at a standstill and blocked during deformation.
  2. Bending machine according to Claim 1, characterized in that the force drive (58) is formed such that during the generation of a force which moves the upper beam tool (20) and the lower beam tool (22) towards one another its speed of displacement is lower than that of the displacement drive (56).
  3. Bending machine according to Claim 1 or 2, characterized in that the force that can be generated by the force drive (58) exceeds the force that can be generated by the displacement drive (56) by a factor of at least two.
  4. Bending machine according to one of the preceding claims, characterized in that the at least one drive, which comprises in each case one displacement drive (56) and one force drive (58), is disposed at an end of the upper beam (16) and of the lower beam (18).
  5. Bending machine according to Claim 4, characterized in that in each case one of the drives (56, 58) is disposed on both sides of the upper beam (16) and the lower beam (18).
  6. Bending machine according to one of the preceding claims, characterized in that the force drive (58) and the displacement drive (56) are combined to form a drive unit (46, 48) which as a whole is operative only between the upper beam (16) and the lower beam (18).
  7. Bending machine according to one of the preceding claims, characterized in that the displacement drive (56') comprises a blocking device (154) which is active when the drive is at a standstill.
  8. Bending machine according to one of the preceding claims, characterized in that the displacement drive (56) is blocked by a self-locking action when it is at a standstill.
  9. Bending machine according to one of the preceding claims, characterized in that the displacement drive (56) is formed as a spindle drive, comprising a threaded spindle (66) and a spindle nut (70).
  10. Bending machine according to Claim 9, characterized in that the spindle nut (70) is drivable by a drive motor (84).
  11. Bending machine according to Claim 9 or 10, characterized in that the spindle nut (70) is driven by means of a self-locking transmission (76, 78).
  12. Bending machine according to one of the preceding claims, characterized in that the force drive (58) is formed as a hydraulic drive (94, 118).
  13. Bending machine according to Claim 12, characterized in that the hydraulic drive (94, 118) comprises a plurality of piston surfaces (102, 104, 106) which act in parallel.
  14. Bending machine according to Claim 12 or 13, characterized in that the hydraulic drive (94, 118) is disposed so as to act directly in the drive unit (46).
  15. Bending machine according to one of Claims 12 to 14, characterized in that a hydraulic unit (122) of the hydraulic drive (94, 118) is disposed at one of the beams (16).
  16. Bending machine according to one of Claims 1 to 13, characterized in that the force drive (58') comprises a lever transmission (132, 134) with a drive (142).
  17. Bending machine according to one of the preceding claims, characterized in that a control unit (42) is provided, which actuates either the displacement drive (56) or the force drive (58).
  18. Bending machine according to one of the preceding claims, characterized in that the force that can be generated by the force drive (58) can be controlled by the control unit (42).
  19. Bending machine according to one of the preceding claims, characterized in that the control unit (42) actuates the force drive (58) as a function of the respective processing operation.
  20. Bending machine according to one of the preceding claims, characterized in that the control unit (42) finally actuates the force drive (58) during clamping of the workpiece (24) in order for the latter to be bent by means of the bending beam (30).
  21. Bending machine according to one of the preceding claims, characterized in that the control unit (42) finally uses the force drive (58) each time the workpiece (24) is acted on by means of the upper beam tool (20) and the lower beam tool (22) in order to be processed.
EP03740347A 2002-09-26 2003-06-26 Bending machine Expired - Lifetime EP1545808B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10245778A DE10245778A1 (en) 2002-09-26 2002-09-26 A bending machine for sheet metal workpieces has a power assisted drive to clamp the workpiece between the holding blocks
DE10245778 2002-09-26
PCT/EP2003/006730 WO2004033124A1 (en) 2002-09-26 2003-06-26 Bending machine

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EP1545808A1 EP1545808A1 (en) 2005-06-29
EP1545808B1 true EP1545808B1 (en) 2007-05-02

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US (1) US7069762B2 (en)
EP (1) EP1545808B1 (en)
JP (1) JP2006500223A (en)
AT (1) ATE361160T1 (en)
DE (2) DE10245778A1 (en)
DK (1) DK1545808T3 (en)
ES (1) ES2285142T3 (en)
PT (1) PT1545808E (en)
WO (1) WO2004033124A1 (en)

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CN104588453A (en) * 2015-01-15 2015-05-06 上海应用技术学院 Simple numerically-controlled bending machine with dual driving systems
CN111069375A (en) * 2019-12-29 2020-04-28 赵明亮 Regulation type bending device

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DE102019104502B4 (en) * 2019-02-21 2021-01-14 Ralf Beger Combination machine for swiveling and swaging a workpiece as well as using a swivel bending machine as a press brake

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CN111069375A (en) * 2019-12-29 2020-04-28 赵明亮 Regulation type bending device
CN111069375B (en) * 2019-12-29 2021-06-08 陈恩义 Regulation type bending device

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DE50307192D1 (en) 2007-06-14
US20050160782A1 (en) 2005-07-28
PT1545808E (en) 2007-06-01
JP2006500223A (en) 2006-01-05
ES2285142T3 (en) 2007-11-16
ATE361160T1 (en) 2007-05-15
US7069762B2 (en) 2006-07-04
WO2004033124A1 (en) 2004-04-22
DK1545808T3 (en) 2007-09-17
DE10245778A1 (en) 2004-04-08
EP1545808A1 (en) 2005-06-29

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