EP0379886A1 - Die device - Google Patents

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Publication number
EP0379886A1
EP0379886A1 EP90100406A EP90100406A EP0379886A1 EP 0379886 A1 EP0379886 A1 EP 0379886A1 EP 90100406 A EP90100406 A EP 90100406A EP 90100406 A EP90100406 A EP 90100406A EP 0379886 A1 EP0379886 A1 EP 0379886A1
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EP
European Patent Office
Prior art keywords
shafts
die device
rack
gear
bending
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Granted
Application number
EP90100406A
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German (de)
French (fr)
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EP0379886B1 (en
Inventor
Rolf Haberstock
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Individual
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Individual
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Priority to AT90100406T priority Critical patent/ATE89201T1/en
Publication of EP0379886A1 publication Critical patent/EP0379886A1/en
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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/02—Bending sheet metal along straight lines, e.g. to form simple curves on press brakes without making use of clamping means
    • B21D5/0209—Tools therefor
    • B21D5/0263—Die with two oscillating halves

Definitions

  • the present invention relates to a die device for die bending sheet metal, with two shafts which are rotatably mounted about their longitudinal axis, flattened on one side and arranged parallel to one another in the longitudinal direction.
  • Such die devices are used in bending machines together with a stamp as a bending tool.
  • a die device of the type mentioned is known, for example, from German utility model G 82 34 901.0.
  • the known die device consists essentially of a prism.
  • half-shell-shaped recesses are made with an opening of less than 180 °, in which the flattened on one side, each with a flat contact surface in the longitudinal direction, is rotatably mounted for the shafts to be bent.
  • the sheet is placed against the flat contact surface of both shafts.
  • a bending punch then moves against the sheet in the area between the two shafts and deforms it at an angle. Due to the flat contact surface on the shafts when they bend, they rotate according to the angular deformation.
  • the known die device has the advantage that the sheet is practically not damaged during bending. In contrast to a prism without waves, with fixed, more or less sharp-edged bending edges, there are no depressions left in the sheet by the bending edges.
  • the sheet to be bent must extend beyond the line parallel to the axis of rotation along the center of the contact surface of both shafts. In practice, this proves to be a considerable restriction of use, because it is not possible to bend sheet metal (particularly to achieve a higher degree of rigidity) in order to produce bending edges with a shorter leg length than the shaft radius.
  • the invention is based in particular on the object of specifying a die device of the type mentioned at the outset, which does not have the above use restriction. According to the invention, these and other objects are achieved by a die device with the features of patent claim 1.
  • the die device according to the invention is accordingly characterized characterized in that the rotation of the shafts is positively coupled in opposite directions to one another by suitable coupling means.
  • the shaft, on which the bending leg does not lie which does not extend beyond the line parallel to its axis of rotation along the center of its contact surface, cannot simply turn away freely, but is forced to always set the angle correctly.
  • the angle results from the contact of the other bending leg on the contact surface of the other shaft.
  • means can be provided for generating a torque acting on both shafts, which counteracts the torque caused by the stamp on the two shafts during the bending process and also rotates the two shafts back into their starting position after the bending process.
  • the means mentioned e.g. can be a spring, the bending result is significantly improved.
  • the die device shown in FIG. 1 has a basic body 1 with an approximately cuboid upper part and a foot part 2 which is designed to be attached to a bending machine.
  • the end faces of the upper part of the base body 1 can be covered by screw-on cover plates.
  • Two shafts 4 and 5, which extend over the entire length of the base body 1, are rotatably mounted and arranged parallel to one another in the longitudinal direction in shell-shaped recesses in its planar upper side 3.
  • the shafts 4, 5 are each flattened on one side in such a way that they can just end with the flat top 3 of the base body 1 in a certain rotational position, as also shown in FIG. 1. Its round part extends over an angle of more than 180 °.
  • the two shafts 4, 5 are therefore embedded in the base body 1 so that they cannot fall out.
  • the radius R of both shafts is the same and in each case approximately twice as large as the distance d mentioned.
  • the absolute dimensioning of the sizes d and R depends on the thickness D of the sheet to be bent. The following should preferably apply: D + d ⁇ R.
  • both shafts 4, 5 are provided with teeth in the manner of a gear rod. Via these teeth, the shafts 4, 5 are each in engagement with at least one (but preferably two in the longitudinal direction one behind the other) toothed disks 6,7.
  • the length of the toothed disks 6, 7 (or their thickness) is approximately 1/4 of the length of the basic body 1. With the toothed disks 6, 7 in engagement there are further two gearwheel shafts 8, 9, at least one of which is like the shafts 4, 5, extends over the entire length of the base body 1.
  • the gear shafts 8, 9 in turn are in engagement with a rack 10, which is arranged between them and which is longitudinally displaceable (in the plane of the drawing) and has teeth on both sides.
  • the rack 10 does not extend over the entire length (perpendicular to the plane of the drawing) of the base body 1 but only over about 1/4 of this length and is arranged centrally in the base body 1 with respect to its length. However, as will be described further below, it can also be arranged so as to be flush with one of the two end faces of the base body.
  • the rack 10 is arranged perpendicular to the flat top 3 of the base body 1 or to the plane defined by the axes of the two shafts 4, 5.
  • the rack 10 is further acted upon in its longitudinal direction by a compression spring 11, into which end pieces 12, 13 are inserted on both sides. All the elements mentioned, ie the toothed disks 6, 7, the gear racks 8, 9, the rack 10, and the compression spring 11 with its end pieces 12, 13, like the shafts 4, 5, are embedded in recesses in the base body 1. In the case of the toothed disks 6, 7, these are blind holes, in the case of the gear racks 8, 9 through holes, in the case of the rack 10 and the compression spring 11, rectangular or cylindrical recesses. The recesses mentioned are partially connected to one another in order to enable the mutual engagement of the elements mounted in them, as described above.
  • the maximum length of the compression spring 11 together with the end pieces 12, 13 inserted into it is determined by the length of the recess in the base body 1 provided for it.
  • the spring 11 can only be inserted into this recess under a certain pretension.
  • the lower end piece 13 of the spring 11 in FIG. 1 abuts an eccentric 14. By turning the eccentric 14, the bias of the spring 11 can be varied within certain limits.
  • Fig. 1 shows the spring 11 in its maximally relaxed position and the rack 10 in its most upwardly displaced position. In this position, the two shafts 4, 5 are aligned with respect to their rotational position so that their flattened sides form a flat surface with the flat top side 3 of the base body 1.
  • the two shafts 4, 5 are positively coupled with respect to their rotation. You can only rotate synchronously in opposite directions against each other, namely from their rotational position shown in Fig. 1 the left only clockwise and the right only counterclockwise.
  • the toothed disks 6, 7 result in the same sense of rotation for the gear racks 8, 9 as for the shafts 4, 5.
  • the gear racks 8, 9 rotate with this sense of rotation, the rack 10 moves downward. This is only possible against the action of the spring 11.
  • the force or torque effect required to overcome the spring action is applied during the bending process by the bending punch. Before and after the bending, the moving parts of the die device described are adjusted under the action of the spring 11 as shown in FIG. 1.
  • Fig. 2 shows the two shafts 4, 5 in a rotated relative to each other. Their flattened surfaces then form an angle of less than 180 ° with one another.
  • the die device is preferably designed such that a relative angle of up to 60 ° between said surfaces is possible.
  • the rack 10 has moved downward in this rotational position.
  • the spring 11 is compressed more.
  • FIG. 3 shows only the upper part of the die device of FIG. 1 with a sheet 15 to be bent and the tip of a bending punch 16.
  • the sheet 15 does not extend beyond the line parallel to the axis of rotation of the right shaft 5 along the center of its flattened surface . Nevertheless, it is possible to bend the sheet 15 as placed on the die device according to FIG. 3. Because of the constraint Coupling the two shafts 4, 5, the right shaft 5 cannot simply turn counterclockwise to the left under the bending pressure, but is forced to set itself in a rotational position determined by the left shaft 4. The rotational position of the left shaft 4 results approximately tangentially to the sheet to be bent.
  • the spring 11 itself is not required for the function described above. However, the spring action results in a considerably improved bending result.
  • the neutral fiber within the area of curvature runs almost in the ideal line in the middle of the sheet.
  • only a very small correction factor has to be taken into account.
  • the tolerances with regard to the length of the bending legs are far below the values achieved so far.
  • the spring 11 namely causes a torque on the two shafts 4, 5 which is opposite to the torque which is exerted on the sheet in its respective deformation state during the bending process by the punch.
  • the torque caused by the stamp pressure on the sheet must therefore exceed the torque caused by the spring 11 in each phase of the bending process. In other words, a higher stamp pressure on the sheet is required to deform the sheet.
  • the thickness of the spring is selected appropriately depending on the sheet thickness and the material constants of the sheet, the result is the very flat bending surface mentioned above. The material flows practically ideally into the shape given to it during bending. During the bending process, especially in its initial phase, the sheet always lies flat against the flattened surfaces of the two shafts 4, 5.
  • the die device according to the invention can further be designed such that it can be composed of basic elements arranged in a row one behind the other and optionally also of intermediate or extension pieces. Its length can then be easily adapted to the length of the sheet to be bent by using more or fewer elements.
  • FIG. 4 shows an example of a basic body of such a die device composed of three basic elements 17, 18 and 19 and two intermediate or extension pieces 20 and 21 in a side view.
  • the basic element 17 corresponds exactly to the die device shown in FIGS. 1 to 3 in an embodiment with 4 toothed disks.
  • Two of the recesses receiving the toothed disks are shown in dashed lines and designated 22 and 23, respectively.
  • Rack 10, spring 11 with their end pieces 12, 13 and eccentric 14 are also indicated by dashed lines.
  • the two basic elements 18 and 19 are identical to one another. In each case, the recess 24 or 25 for the rack is not centered with respect to it Length but arranged open to one of their end faces.
  • Fig. 5 shows the base element 18 in supervision of the corresponding end face. 4, the two basic elements 18 and 19 are inserted in different orientations with their end faces, towards which the rack recesses 24 and 25 are open, facing each other. Also, only two toothed disks are provided for the basic elements 18 and 19. The recesses provided for receiving these toothed disks are again shown in dashed lines and designated 26 and 27, respectively.
  • the basic elements 18 and 19 do not have an integrated spring mechanism. Instead, the rack 28 is designed to project downward beyond its foot part. An external spring mechanism (not shown) can engage it in any way on this projecting part.
  • FIG. 6 shows a perspective view of the intermediate or extension piece 20. Like the element 21, this has only two recesses 29-32 required for the two shafts and two for the two gear shaft.
  • the elements 20, 21 are not, like the basic elements 17-19 described above, also designed to accommodate toothed lock washers, toothed racks and / or springs.
  • the length of the shafts and gear racks to be used in the base body composed of the elements described above is dimensioned such that it extends over the latter extend the entire length in one piece or in several sections.
  • the individual elements can be screwed together using continuous threaded rods. Two or only a single rack of double width can be inserted into the two adjacent rack recesses 24 and 25.
  • the forced coupling of the two shafts can of course also be carried out in a different way than described above, for example as shown in FIG. 7.
  • the two shafts 4, 5 are directly engaged with two gearwheel rods 33, 34, which are also in engagement with one another, without the interposition of toothed disks.
  • the two gear racks 33, 34 do not have the same diameter, which makes it possible for the rack 10 to be in engagement with the gear rack 34 without being in engagement with the shaft 4 at the same time.
  • the two gear racks 33, 34 could also have the same size.
  • the action of the spring 7 could of course also be realized in a different way, for example hydraulically or pneumatically. There is also largely freedom with regard to the over Type of bearing of the above-mentioned effect on the two shafts 4, 5. Also in the die devices or basic elements according to FIGS. 1-3, 7, the toothed rack could be arranged outside the center, flush with one of the end faces.

Abstract

The present invention relates to a die device for the die bending of metal sheets, having two shafts (4, 5) which are mounted in such a way as to be rotatable about their longitudinal axis, are flattened on one side and are arranged in parallel next to one another in the longitudinal direction. In order, in particular, to be able also to produce bent portions with a smaller length than the shaft radius in an appropriate manner, the rotation of the shafts in the die device according to the invention is positively coupled, with opposite directions of rotation with respect to one another, by coupling means (6 - 10). <IMAGE>

Description

Technisches GebietTechnical field

Die vorliegende Erfindung betrifft eine Gesenkvorrichtung zum Gesenkbiegen von Blechen, mit zwei um ihre Längsachse drehbar gelagerten, einseitig abgeflachten, parallel in Längsrichtung nebeneinander angeordneten Wellen. Solche Gesenkvorrichtungen werden in Biegemaschienen zusammen mit einem Stempel als Biegewerkzeug verwendet.The present invention relates to a die device for die bending sheet metal, with two shafts which are rotatably mounted about their longitudinal axis, flattened on one side and arranged parallel to one another in the longitudinal direction. Such die devices are used in bending machines together with a stamp as a bending tool.

Stand der TechnikState of the art

Eine Gesenkvorrichtung der genannten Art ist beispielsweise bekannt aus dem deutschen Gebrauchsmuster G 82 34 901.0. Die bekannte Gesenkvorrichtung besteht im wesentlichen aus einem Prisma. Im Bereich der Biegekanten des Prismas sind halb­schalenförmige Ausnehmungen mit einer Öffnung von weniger als 180° eingelassen, in denen die einseitg abgeflachten, in Längsrichtung jeweils eine ebene Anlagefläche für das zu biegende Blech aufweisenden Wellen drehbar gelagert sind. Zum Biegen wird das Blech gegen die ebene Anlagefläche beider Wellen gelegt. Anschliessend fährt ein Biegestempel gegen das Blech im Bereich zwischen den beiden Wellen und verformt dieses winklig. Durch die ebene Anlagefläche an den Wellen drehen sich diese beim Biegen entsprechend der winkligen Verformung mit.A die device of the type mentioned is known, for example, from German utility model G 82 34 901.0. The known die device consists essentially of a prism. In the area of the bending edges of the prism, half-shell-shaped recesses are made with an opening of less than 180 °, in which the flattened on one side, each with a flat contact surface in the longitudinal direction, is rotatably mounted for the shafts to be bent. For bending, the sheet is placed against the flat contact surface of both shafts. A bending punch then moves against the sheet in the area between the two shafts and deforms it at an angle. Due to the flat contact surface on the shafts when they bend, they rotate according to the angular deformation.

Die bekannte Gesenkvorrichtung hat den Vorteil, dass das Blech beim Biegen praktisch nicht beschädigt wird. Im Unter­schied zu einem Prisma ohne Wellen, mit feststehenden, mehr oder weniger scharfkantigen Biegekanten, bleiben im Blech keine durch die Biegekanten eingeprägten Vertiefungen zurück.The known die device has the advantage that the sheet is practically not damaged during bending. In contrast to a prism without waves, with fixed, more or less sharp-edged bending edges, there are no depressions left in the sheet by the bending edges.

Bei der bekannten Gesenkvorrichtung muss das zu biegende Blech jedoch jeweils über die zur Drehachse parallele Linie entlang der Mitte der Anlagefläche beider Wellen hinaus­reichen. Dies erweist sich in der Praxis als erhebliche Gebrauchseinschränkung, weil das (vor allem zur Erzielung einer höheren Steifigkeit) häufig erforderliche Abkanten von Blechen zur Herstellung von Biegekanten mit geringerer Schenkellänge als dem Wellenradius nicht möglich ist.In the known die device, however, the sheet to be bent must extend beyond the line parallel to the axis of rotation along the center of the contact surface of both shafts. In practice, this proves to be a considerable restriction of use, because it is not possible to bend sheet metal (particularly to achieve a higher degree of rigidity) in order to produce bending edges with a shorter leg length than the shaft radius.

Darstellung der ErfindungPresentation of the invention

Der Erfindung liegt insbesondere die Aufgabe zugrunde, eine Gesenkvorrichtung der eingangs genannten Art anzugeben, welche die obige Gebrauchseinschränkung nicht aufweist. Diese sowie weitere Aufgaben werden erfindungsgemäss gelöst durch eine Gesenkvorrichtung mit den Merkmalen des Patentanspruchs 1.The invention is based in particular on the object of specifying a die device of the type mentioned at the outset, which does not have the above use restriction. According to the invention, these and other objects are achieved by a die device with the features of patent claim 1.

Die erfindungsgemässe Gesenkvorrichtung ist demnach dadurch gekennzeichnet, dass die Drehung der Wellen durch geeignete Kopplungsmittel gegensinnig zueinander zwangsgekoppelt ist. Dadurch kann sich die Welle, an der der nicht über die zu ihrer Drehachse parallele Linie entlang der Mitte ihrer Anlagefläche hinausreichende Biegschenkel anliegt, nicht einfach frei wegdrehen, sondern ist gezwungen sich im Winkel stets richtg einzustellen. Der Winkel ergibt sich durch die Anlage des anderen Biegeschenkels an der Anlagefläche der anderen Welle.The die device according to the invention is accordingly characterized characterized in that the rotation of the shafts is positively coupled in opposite directions to one another by suitable coupling means. As a result, the shaft, on which the bending leg does not lie, which does not extend beyond the line parallel to its axis of rotation along the center of its contact surface, cannot simply turn away freely, but is forced to always set the angle correctly. The angle results from the contact of the other bending leg on the contact surface of the other shaft.

Vorteilhafte und auch bevorzugte Weiterbildungen der Erfin­dung sind in den abhängigen Ansprüchen gekennzeichnet.Advantageous and also preferred developments of the invention are characterized in the dependent claims.

Insbesondere können Mittel zur Erzeugung eines auf beide Wellen einwirkenden Drehmomentes vorgesehen werden, welches dem auf die beiden Wellen beim Biegevorgang einwirkenden, durch den Stempel verursachten Drehmoment entgegenwirkt und zudem die beiden Wellen nach dem Biegvorgang wieder in ihre Ausgangsstellung zurückdreht. Durch die genannten Mittel, die z.B. eine Feder sein können, wird das Biegeergebnis erheblich verbessert.In particular, means can be provided for generating a torque acting on both shafts, which counteracts the torque caused by the stamp on the two shafts during the bending process and also rotates the two shafts back into their starting position after the bending process. By the means mentioned, e.g. can be a spring, the bending result is significantly improved.

Weitere Ausgestaltungen und Vorteile der Erfindung ergeben sich aus der nachstehenden Beschreibung von Ausführungs­beispielen, wobei auf die beigefügten Zeichnungen Bezug genommen wird.Further refinements and advantages of the invention result from the following description of exemplary embodiments, reference being made to the attached drawings.

Kurze Beschreibung der ZeichnungenBrief description of the drawings

In den beigefügten Zeichnungen zeigt:

  • Fig. 1 in geschnittener Darstellung eine erste Ausführungs­form einer Gesenkvorrichtung nach der Erfindung,
  • Fig. 2 in geschnittener Darstellung die Gesenkvorrichtung von Fig. 1 mit gegeneinander verdrehten Wellen,
  • Fig. 3 in geschnittener Darstellung den oberen Teil der Gesenkvorichtung von Fig. 1 mit einem auf eine der beiden Wellen nur knapp aufgelegten Blech,
  • Fig. 4 in teilweise geschnittener Darstellung eine aus mehreren Elementen zusammengesetzte Gesenkvorrich­tung,
  • Fig. 5 in Aufsicht eines der Grundelemente der zusammen­gesetzten Gesenkvorrichtung von Fig. 4,
  • Fig. 6 in perspektivischer Darstellung ein Zwischen- oder Verlängerungstück der Gesenkvorrichtung von Fig. 4, und
  • Fig. 7 in geschnittener Darstellung eine weitere Aus­führungsform einer Gesenkvorrichtung nach der Er­findung.
In the accompanying drawings:
  • 1 is a sectional view of a first embodiment of a die device according to the invention,
  • 2 is a sectional view of the die device of FIG. 1 with mutually rotated shafts,
  • 3 shows a sectional representation of the upper part of the die device of FIG. 1 with a sheet metal barely placed on one of the two shafts,
  • 4 is a partially sectioned illustration of a die device composed of several elements,
  • 5 is a top view of one of the basic elements of the composite die device of FIG. 4,
  • Fig. 6 is a perspective view of an intermediate or extension piece of the die device of Fig. 4, and
  • Fig. 7 in section a further embodiment of a die device according to the invention.

Soweit in den Figuren Teile übereinstimmen sind diese mit übereinstimmenden Bezugszeichen versehen.As far as parts in the figures match, they are provided with the same reference numerals.

Wege zur Ausführung der ErfindungWays of Carrying Out the Invention

Die in Fig. 1 dargestellte Gesenkvorrichtung weist einen Grundköper 1 mit einem etwa quaderförmigen Oberteil und einem zur Befestigung auf einer Biegemaschine geeignet ausgebilde­ten Fussteil 2 auf. Die Stirnseiten des Oberteils des Grund­körpers 1 sind durch aufschraubbare Abdeckbleche abdeckbar. In schalenförmigen Ausnehmungen in dessen planer Oberseite 3 sind zwei sich über die gesamte Länge des Grundkörpers 1 erstreckende Wellen 4 bzw. 5 drehbar sowie parallel in Längs­richtung unmittelbar nebeneinander angeordnet gelagert. Die Wellen 4, 5 sind auf einer Seite jeweils abgeflacht und zwar derart, dass sie mit der planen Oberseite 3 des Grundkörpers 1 in einer bestimmten Drehstellung eben abschliessen können, wie in Fig. 1 auch dargestellt. Ihr rund belassener Teil erstreckt sich über einen Winkel von mehr als 180°. Die beiden Wellen 4,5 sind deshalb im Grundkörper 1 gegen Heraus­fallen gesichert eingebettet. Der sich weiter aus diesem Grund ergebende Abstand zwischen der Achse der Wellen 4, 5 und ihren planen Flächen ist mit d bezeichnet. Der Radius R beider Wellen ist gleich und jeweils etwa doppelt so gross wie der genannte Abstand d. Die absolute Bemessung der Grössen d und R richtet sich nach der Dicke D des zu biegen­den Bleches. Vorzugsweise sollte gelten: D + d < R.The die device shown in FIG. 1 has a basic body 1 with an approximately cuboid upper part and a foot part 2 which is designed to be attached to a bending machine. The end faces of the upper part of the base body 1 can be covered by screw-on cover plates. Two shafts 4 and 5, which extend over the entire length of the base body 1, are rotatably mounted and arranged parallel to one another in the longitudinal direction in shell-shaped recesses in its planar upper side 3. The shafts 4, 5 are each flattened on one side in such a way that they can just end with the flat top 3 of the base body 1 in a certain rotational position, as also shown in FIG. 1. Its round part extends over an angle of more than 180 °. The two shafts 4, 5 are therefore embedded in the base body 1 so that they cannot fall out. The distance between the axis of the shafts 4, 5 and their flat surfaces, which results further for this reason, is denoted by d. The radius R of both shafts is the same and in each case approximately twice as large as the distance d mentioned. The absolute dimensioning of the sizes d and R depends on the thickness D of the sheet to be bent. The following should preferably apply: D + d <R.

Auf ihren nicht abgeflachten, rund belassenen Seiten, d.h. in Fig. 1 unten, sind beide Wellen 4, 5 mit einer Zahnung nach Art einer Zahnradstange versehen. Über diese Zahnung befinden sich die Wellen 4, 5 jeweils in Eingriff mit mindestens einer (vorzugsweise jedoch zwei in Längsrichtung hintereinander angeordneten) Zahnscheiben 6,7. Die Länge der Zahnscheiben 6, 7 (bzw. ihre Dicke) beträgt etwa 1/4 der Länge des Grund­körpes 1. Mit den Zahnscheiben 6, 7 in Eingriff befinden sich weiter zwei Zahnradwellen 8, 9, von denen sich mindestens eine, wie die Wellen 4, 5, über die gesamte Länge des Grund­körpers 1 erstreckt. Die Zahnradwellen 8, 9 stehen ihrerseits mit einer zwischen ihnen angeordneten, (in der Zeichenebene) längsverschieblichen Zahnstange 10 mit beidseitiger Zahnung in Eingriff. Die Zahnstange 10 erstreckt sich nicht über die gesamte Länge (senkrecht zur Zeichenebene) des Grundkörpers 1 sondern lediglich über etwa 1/4 dieser Länge und ist im Grundkörper 1 bezüglich seiner Länge mittig angeordnet. Sie kann, wie weiter unten noch beschrieben werden wird, jedoch auch mit einer der beiden Stirnflächen des Grundkörpers bündig abschliessend angeordnet sein. Die Zahnstange 10 ist senkrecht zur planen Oberseite 3 des Grundkörpers 1 bzw. zu der durch die Achsen der beiden Wellen 4, 5 definierten Ebene angeordnet.On their non-flattened, rounded sides, i.e. in Fig. 1 below, both shafts 4, 5 are provided with teeth in the manner of a gear rod. Via these teeth, the shafts 4, 5 are each in engagement with at least one (but preferably two in the longitudinal direction one behind the other) toothed disks 6,7. The length of the toothed disks 6, 7 (or their thickness) is approximately 1/4 of the length of the basic body 1. With the toothed disks 6, 7 in engagement there are further two gearwheel shafts 8, 9, at least one of which is like the shafts 4, 5, extends over the entire length of the base body 1. The gear shafts 8, 9 in turn are in engagement with a rack 10, which is arranged between them and which is longitudinally displaceable (in the plane of the drawing) and has teeth on both sides. The rack 10 does not extend over the entire length (perpendicular to the plane of the drawing) of the base body 1 but only over about 1/4 of this length and is arranged centrally in the base body 1 with respect to its length. However, as will be described further below, it can also be arranged so as to be flush with one of the two end faces of the base body. The rack 10 is arranged perpendicular to the flat top 3 of the base body 1 or to the plane defined by the axes of the two shafts 4, 5.

Die Zahnstange 10 wird weiter in ihrer Längsrichtung von einer Druckfeder 11 beaufschlagt, in die beiseitig Endstücke 12, 13 eingesetzt sind. Alle genannten Elemente, d.h. die Zahnscheiben 6, 7, die Zahnradstangen 8, 9, die Zahnstange 10, sowie die Druckfeder 11 mit ihren Endstücken 12, 13 sind wie die Wellen 4, 5 in Ausnehmungen im Grundkörper 1 eingebettet. Im Falle der Zahnscheiben 6, 7 sind dies Sacklöcher, im Falle der Zahnradstangen 8, 9 Durchgangslöcher, im Falle der Zahn­stange 10 und der Druckfeder 11 rechteckige oder zylindrische Ausnehmungen. Die genannten Ausnehmungen stehen teilweise miteinander in Verbindung, um den gegenseitigen Eingriff der in ihnen gelagerten Elemente, wie vorstehend beschrieben, zu ermöglichen. Die maximale Länge der Druckfeder 11 zusammen mit den in sie eingesetzten Endstücken 12, 13 wird durch die Länge der für sie vorgesehenen Ausnehmung im Grundkörper 1 bestimmt. Die Feder 11 ist in diese Ausnehmung nur unter einer gewissen Vorspannung einsetzbar. Das in Fig. 1 untere Endstück 13 der Feder 11 liegt an einem Excenter 14 an. Durch Verdrehen des Excenters 14 kann die Vorspannung der Feder 11 in gewissen Grenzen variiert werden.The rack 10 is further acted upon in its longitudinal direction by a compression spring 11, into which end pieces 12, 13 are inserted on both sides. All the elements mentioned, ie the toothed disks 6, 7, the gear racks 8, 9, the rack 10, and the compression spring 11 with its end pieces 12, 13, like the shafts 4, 5, are embedded in recesses in the base body 1. In the case of the toothed disks 6, 7, these are blind holes, in the case of the gear racks 8, 9 through holes, in the case of the rack 10 and the compression spring 11, rectangular or cylindrical recesses. The recesses mentioned are partially connected to one another in order to enable the mutual engagement of the elements mounted in them, as described above. The maximum length of the compression spring 11 together with the end pieces 12, 13 inserted into it is determined by the length of the recess in the base body 1 provided for it. The spring 11 can only be inserted into this recess under a certain pretension. The lower end piece 13 of the spring 11 in FIG. 1 abuts an eccentric 14. By turning the eccentric 14, the bias of the spring 11 can be varied within certain limits.

Fig. 1 zeigt die Feder 11 in ihrer maximal entspannten und die Zahnstange 10 in ihrer am weitesten nach oben verschoben­en Position. In dieser Position sind die beiden Wellen 4, 5 bezüglich ihrer Drehlage so ausgerichtet, dass ihre abge­flachten Seiten mit der planen Oberseite 3 des Grundkörpers 1 eine plane Fläche bilden.Fig. 1 shows the spring 11 in its maximally relaxed position and the rack 10 in its most upwardly displaced position. In this position, the two shafts 4, 5 are aligned with respect to their rotational position so that their flattened sides form a flat surface with the flat top side 3 of the base body 1.

Bei der vorstehend beschriebenen Gesenkvorrichtung sind die beiden Wellen 4, 5 bezüglich ihrer Drehung zwangsgekoppelt. Sie können sich nur synchron gegegensinnig gegeneinander drehen und zwar aus ihrer in Fig. 1 dargestellten Drehlage die linke nur im Uhrzeigersinn und die rechte nur im Gegen­uhrzeigersinn. Über die Zahnscheiben 6, 7 ergibt sich für die Zahnradstangen 8, 9 der gleiche Drehsinn wie für die Wellen 4, 5. Bei Drehung der Zahnradstangen 8, 9 mit diesem Drehsinn bewegt sich die Zahnstange 10 nach unten. Dies ist nur gegen die Wirkung der Feder 11 möglich. Die zur Überwindung der Federwirkung erforderliche Kraft- bzw. Drehmomentwirkung wird beim Biegevorgang durch den Biegestempel aufgebracht. Vor und nach dem Biegen stellen sich die beweglichen Teile der be­schriebenen Gesenkvorrichtung unter der Wirkung der Feder 11 so wie in Fig. 1 dargestellt ein.In the die device described above, the two shafts 4, 5 are positively coupled with respect to their rotation. You can only rotate synchronously in opposite directions against each other, namely from their rotational position shown in Fig. 1 the left only clockwise and the right only counterclockwise. The toothed disks 6, 7 result in the same sense of rotation for the gear racks 8, 9 as for the shafts 4, 5. When the gear racks 8, 9 rotate with this sense of rotation, the rack 10 moves downward. This is only possible against the action of the spring 11. The force or torque effect required to overcome the spring action is applied during the bending process by the bending punch. Before and after the bending, the moving parts of the die device described are adjusted under the action of the spring 11 as shown in FIG. 1.

Fig. 2 zeigt die beiden Wellen 4, 5 in einer gegeneinander verdrehten Drehlage. Ihre abgeflachten Flächen bilden dann einen Winkel kleiner als 180° miteinander. Vorzugsweise ist die Gesenkvorrichtung so ausgebildet, dass ein Relativwinkel zwischen den genannten Flächen von bis zu 60° möglich ist. Wie deutlich zu sehen ist, hat sich bei dieser Drehlage die Zahnstange 10 nach unten bewegt. Die Feder 11 ist stärker zusammengedrückt.Fig. 2 shows the two shafts 4, 5 in a rotated relative to each other. Their flattened surfaces then form an angle of less than 180 ° with one another. The die device is preferably designed such that a relative angle of up to 60 ° between said surfaces is possible. As can clearly be seen, the rack 10 has moved downward in this rotational position. The spring 11 is compressed more.

Fig. 3 zeigt lediglich den oberen Teil der Gesenkvorrichtung von Fig. 1 mit einem aufgelegten zu biegenden Blech 15 und die Spitze eines Biegestempels 16. Das Blech 15 reicht nicht über die zur Drehachse der rechten Welle 5 parallele Linie entlang der Mitte ihrer abgeflachten Fläche hinaus. Dennoch ist es möglich das Blech 15, wie auf die Gesenkvorrichtung gemäss Fig. 3 aufgelegt, zu biegen. Auf Grund der Zwangs­ kopplung der beiden Wellen 4, 5 kann sich die rechte Welle 5 unter dem Biegedruck nicht einfach nach links im Gegen­uhrzeigersinn wegdrehen, sondern ist gezwungen sich jeweils in einer durch die linke Welle 4 bestimmten Drehstellung ein­zustellen. Die Drehstellung der linken Welle 4 ergibt sich jeweils etwa tangential zum zu biegenden Blech.FIG. 3 shows only the upper part of the die device of FIG. 1 with a sheet 15 to be bent and the tip of a bending punch 16. The sheet 15 does not extend beyond the line parallel to the axis of rotation of the right shaft 5 along the center of its flattened surface . Nevertheless, it is possible to bend the sheet 15 as placed on the die device according to FIG. 3. Because of the constraint Coupling the two shafts 4, 5, the right shaft 5 cannot simply turn counterclockwise to the left under the bending pressure, but is forced to set itself in a rotational position determined by the left shaft 4. The rotational position of the left shaft 4 results approximately tangentially to the sheet to be bent.

Für die vorstehend beschriebene Funktion ist die Feder 11 an sich nicht erforderlich. Durch die Federwirkung ergibt sich jedoch ein erheblich verbessertes Biegeergebnis. Die Biege­fläche wird ebener. Die neutrale Faser innerhalb des Krüm­mungsbereiches verläuft beinahe in der Ideallinie in der Mitte des Bleches. Beim Zuschnitt des Bleches ist nur ein sehr geringer Korrekturfaktor zu berücksichtigen. Die Tole­ranzen bezüglich der Länge der Biegeschenkel liegen weit unterhalb der bisher erreichten Werte.The spring 11 itself is not required for the function described above. However, the spring action results in a considerably improved bending result. The bending surface becomes flatter. The neutral fiber within the area of curvature runs almost in the ideal line in the middle of the sheet. When cutting the sheet, only a very small correction factor has to be taken into account. The tolerances with regard to the length of the bending legs are far below the values achieved so far.

Die Feder 11 bewirkt nämlich ein Drehmoment auf die beiden Wellen 4, 5 welches dem Drehmoment entgegengerichtet ist, welches beim Biegevorgang vom Biegestempel über das Blech in seinem jeweiligen Verformungszustand auf diese ausgeübt wird. Zur Verformung des Blechs muss daher in jeder Phase des Biege­vorgangs das durch den Stempeldruck auf das Blech verursachte Drehmoment das von der Feder 11 verursachte Drehmoment über­steigen. Es ist mit anderen Worten zur Verformung des Bleches ein höherer Stempeldruck auf das Blech erforderlich. Bei in Abhängigkeit von der Blechdicke und den Materialkonstanten des Bleches geeignet gewählter Stärke der Feder ergibt sich die oben erwähnte sehr ebene Biegefläche. Das Material fliesst beim Biegen praktisch ideal in die ihm vorgegebene Form. Das Blech liegt während des Biegevorgangs, vor allem in dessen Anfangsphase, immer eben an den abgeflachten Flächen der beiden Wellen 4, 5 an.The spring 11 namely causes a torque on the two shafts 4, 5 which is opposite to the torque which is exerted on the sheet in its respective deformation state during the bending process by the punch. To deform the sheet, the torque caused by the stamp pressure on the sheet must therefore exceed the torque caused by the spring 11 in each phase of the bending process. In other words, a higher stamp pressure on the sheet is required to deform the sheet. If the thickness of the spring is selected appropriately depending on the sheet thickness and the material constants of the sheet, the result is the very flat bending surface mentioned above. The material flows practically ideally into the shape given to it during bending. During the bending process, especially in its initial phase, the sheet always lies flat against the flattened surfaces of the two shafts 4, 5.

Die erfindungsgemässe Gesenkvorrichtung kann weiter so aus­gebildet werden, dass sie sich aus hintereinander in Reihe angeordneten Grundelementen und wahlweise auch noch aus Zwischen- oder Verlängerungsstücken zusammensetzen lässt. Sie ist dann bezüglich ihrer Länge in einfacher Weise durch Verwendung mehr oder weniger Elemente an die Länge des zu biegenden Bleches anpassbar. Fig. 4 zeigt ein Beispiel für einen aus drei Grundelementen 17, 18 und 19 sowie zwei Zwischen- bzw. Verlängerungsstücken 20 und 21 zusammenge­setzten Grundkörper einer solchen Gesenkvorrichtung in Seitenansicht.The die device according to the invention can further be designed such that it can be composed of basic elements arranged in a row one behind the other and optionally also of intermediate or extension pieces. Its length can then be easily adapted to the length of the sheet to be bent by using more or fewer elements. FIG. 4 shows an example of a basic body of such a die device composed of three basic elements 17, 18 and 19 and two intermediate or extension pieces 20 and 21 in a side view.

Das Grundelement 17 entspricht gerade der in den Fig. 1 bis 3 dargestellten Gesenkvorrichtung in einer Ausbildung mit 4 Zahnscheiben. Zwei der die Zahnscheiben aufnehmenden Aus­nehmungen sind strichliert dargestellt und mit 22 bzw. 23 bezeichnet. Ebenfalls strichliert angedeutet sind Zahnstange 10, Feder 11 mit ihren Endstücken 12, 13 sowie Excenter 14.The basic element 17 corresponds exactly to the die device shown in FIGS. 1 to 3 in an embodiment with 4 toothed disks. Two of the recesses receiving the toothed disks are shown in dashed lines and designated 22 and 23, respectively. Rack 10, spring 11 with their end pieces 12, 13 and eccentric 14 are also indicated by dashed lines.

Die beiden Grundelemente 18 bzw. 19 sind untereinander identisch ausgebildet. Bei ihnen ist jeweils die Ausnehmung 24 bzw. 25 für die Zahnstange nicht mittig bezüglich ihrer Länge sondern zu jeweils einer ihrer Stirnseiten hin offen angeordnet. Fig. 5 zeigt das Grundelement 18 in Aufsicht auf die entsprechende Stirnseite. In die zusammengesetzte Gesenk­vorrichtung von Fig. 4 sind die beiden Grundelemente 18 und 19 in unterschiedlicher Orientierung mit ihren Stirnseiten, zu denen die Zahnstangenausnehmungen 24, bzw. 25 hin offen sind, gegeneinandergerichtet eingesetzt. Auch sind bei den Grundelementen 18 und 19 jeweils nur zwei Zahnscheiben vor­gesehen. Die zur Aufnahme dieser Zahnscheiben vorgesehenen Ausnehmungen sind wieder strichliert dargestellt und mit 26 bzw. 27 bezeichnet. Die Grundelemente 18 bzw. 19 weisen keinen integrierten Federmechanismus auf. Statt dessen ist bei ihnen die Zahnstange 28 jeweils nach unten über ihren Fussteil hinaus überstehend ausgebildet. An diesem über­stehenden Teil kann ihn beliebiger Weise ein externer Feder­mechanismus (nicht dargestellt) angreifen.The two basic elements 18 and 19 are identical to one another. In each case, the recess 24 or 25 for the rack is not centered with respect to it Length but arranged open to one of their end faces. Fig. 5 shows the base element 18 in supervision of the corresponding end face. 4, the two basic elements 18 and 19 are inserted in different orientations with their end faces, towards which the rack recesses 24 and 25 are open, facing each other. Also, only two toothed disks are provided for the basic elements 18 and 19. The recesses provided for receiving these toothed disks are again shown in dashed lines and designated 26 and 27, respectively. The basic elements 18 and 19 do not have an integrated spring mechanism. Instead, the rack 28 is designed to project downward beyond its foot part. An external spring mechanism (not shown) can engage it in any way on this projecting part.

Fig. 6 zeigt in perspektivischer Darstellung das Zwischen- bzw. Verlängerungsstück 20. Wie das Element 21 weist dieses lediglich zwei für die beiden Wellen sowie zwei für die beiden Zahnradwellen erforderliche Ausnehmungen 29 - 32 auf. Die Elemente 20, 21 sind nicht, wie die vorbeschriebenen Grundelemente 17 - 19, auch zur Aufnahme von Zahnscheiben, Zahnstangen und/oder Federn ausgebildet.6 shows a perspective view of the intermediate or extension piece 20. Like the element 21, this has only two recesses 29-32 required for the two shafts and two for the two gear shaft. The elements 20, 21 are not, like the basic elements 17-19 described above, also designed to accommodate toothed lock washers, toothed racks and / or springs.

Die Länge der in den aus den vorbeschriebenen Elementen zusammengesetzten Grundkörper einzusetzenden Wellen sowie Zahnradstangen wird so bemessen, dass sie sich über dessen gesamte Länge in einem Stück oder auch in mehreren Teil­stücken erstrecken. Die einzelnen Elemente können schliess­lich mittels durchgehender Gewindestangen verschraubt werden. In die beiden aneinander angrenzenden Zahnstangenausnehmungen 24 und 25 können zwei oder auch nur eine einzige Zahnstange doppelter Breite eingesetzt werden.The length of the shafts and gear racks to be used in the base body composed of the elements described above is dimensioned such that it extends over the latter extend the entire length in one piece or in several sections. Finally, the individual elements can be screwed together using continuous threaded rods. Two or only a single rack of double width can be inserted into the two adjacent rack recesses 24 and 25.

Es versteht sich, dass die vorbeschriebenen Grundelemente und Zwischenstücke in praktisch beliebiger Weise miteinander kombinierbar sind.It goes without saying that the above-described basic elements and intermediate pieces can be combined with one another in virtually any manner.

Die Zwangskopplung der beiden Wellen kann natürlich auch in anderer Weise, als vorstehend beschrieben, ausgeführt sein, beispielsweise wie in Fig. 7 dargestellt. Hier sind die beiden Wellen 4, 5 direkt ohne Zwischenschaltung von Zahn­scheiben mit zwei Zahnradstangen 33, 34 in Eingriff, welche jeweils auch untereinander in Eingriff sind. Die beiden Zahn­radstangen 33, 34 weisen nicht den gleichen Durchmesser auf, wodurch es möglich ist, dass sich die Zahnstange 10 in Ein­griff mit der Zahnradstange 34 befindet, ohne gleichzeitig mit der Welle 4 in Eingriff zu sein. Bei einer anderen Anordnung der Zahnstange oder gar dem Verzicht auf die Federwirkung könnten die beiden Zahnradstangen 33, 34 auch gleich gross bemessen sein.The forced coupling of the two shafts can of course also be carried out in a different way than described above, for example as shown in FIG. 7. Here, the two shafts 4, 5 are directly engaged with two gearwheel rods 33, 34, which are also in engagement with one another, without the interposition of toothed disks. The two gear racks 33, 34 do not have the same diameter, which makes it possible for the rack 10 to be in engagement with the gear rack 34 without being in engagement with the shaft 4 at the same time. With a different arrangement of the rack or even without the spring action, the two gear racks 33, 34 could also have the same size.

Desweiteren könnte natürlich auch die Wirkung der Feder 7 auf andere Art realisiert werden, z.B hydraulisch oder pneuma­tisch. Auch besteht weitgehend Freiheit bezüglich der Über­ tragunsart der genannten Wirkung auf die beiden Wellen 4, 5. Auch bei den Gesenkvorrichtungen bzw. Grundelementen gemäss den Fig. 1- 3 bzw. 7 könnte die Zahnstange ausserhalb der Mitte, mit einer der Stirnseiten bündig abschliessend, angeordnet sein.Furthermore, the action of the spring 7 could of course also be realized in a different way, for example hydraulically or pneumatically. There is also largely freedom with regard to the over Type of bearing of the above-mentioned effect on the two shafts 4, 5. Also in the die devices or basic elements according to FIGS. 1-3, 7, the toothed rack could be arranged outside the center, flush with one of the end faces.

Claims (10)

1. Gesenkvorrichtung zum Gesenkbiegen von Blechen, mit zwei um ihre Längsachse drehbar gelagerten, einseitig abgeflachten, parallel in Längsrichtung nebeneinander an­geordneten Wellen (4,5), dadurch gekennzeichnet, dass die Drehung der Wellen durch Kopplungsmittel (6 - 10; 33,34) gegensinnig zueinander zwangsgekoppelt ist.1. Die device for die bending of metal sheets, with two shafts (4, 5), which are rotatably mounted about their longitudinal axis, flattened on one side and parallel to one another in the longitudinal direction, characterized in that the rotation of the shafts by coupling means (6-10; is positively coupled to each other in opposite directions. 2. Gesenkvorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die beiden Wellen gleichen Durchmesser aufweisen und dass ihre Kopplung derart ausgebildet ist, dass sie sich jeweils synchron um den gleichen Winkelbetrag gegen­sinnig zu drehen gezwungen sind.2. Die device according to claim 1, characterized in that the two shafts have the same diameter and that their coupling is designed such that they are each forced to rotate in opposite directions synchronously by the same angular amount. 3. Gesenkvorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die beiden Wellen auf ihren nicht abge­flachten, rund belassenen Seiten zumindest über einen der ge­wünschten maximalen Drehung beim Biegevorgang entsprechenden Winkelbereich mit einer Zahnung nach Art einer Zahnradstange versehen sind.3. die device according to claim 1 or 2, characterized in that the two shafts are provided on their non-flattened, round sides at least over an angular range corresponding to the desired maximum rotation during the bending process with teeth in the manner of a gear rod. 4. Gesenkvorrichtung nach Anspruch 3, dadurch gekennzeichnet, dass die beiden Wellen mit Zahnrad- bzw. Zahnstangenmitteln (6 - 10; 28; 33,34) in Eingriff sind, welche ihre gewünschte Zwangskopplung bewirken.4. die device according to claim 3, characterized in that the two shafts with gear or Rack means (6-10; 28; 33,34) are engaged, which bring about their desired positive coupling. 5. Gesenkvorrichtung nach Anspruch 4, dadurch gekennzeichnet, dass die Zahnrad- bzw. Zahnstangenmittel mit den beiden Wellen jeweils in Eingriff befindliche erste Zahn­radmittel (6, 7), mit den ersten Zahnradmitteln jeweils in Eingriff befindliche zweite Zahnradmittel (8,9) sowie eine in Eingriff mit den beiden zweiten Zahnradmitteln befindliche Zahnstange (10; 28) sind.5. die device according to claim 4, characterized in that the gear or rack means with the two shafts respectively engaged first gear means (6, 7), with the first gear means respectively engaged second gear means (8,9) and one are in engagement with the two second gear means rack (10; 28). 6. Gesenkvorrichtung nach einem der Ansprüche 5, dadurch gekennzeichnet, dass die Zahnstange bezüglich ihrer Längsrichtung senkrecht zu der durch die Achsen der beiden Wellen definierten Ebene angeordnet ist.6. die device according to one of claims 5, characterized in that the rack is arranged with respect to its longitudinal direction perpendicular to the plane defined by the axes of the two shafts. 7. Gesenkvorrichtung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass Mittel (11) zur Erzeugung eines auf die beiden Wellen einwirkenden, vorzugsweise inner­halb eines bestimmten Bereiches nach Wahl einstellbaren Dreh­momentes vorgesehen sind, welches dem auf die beiden Wellen beim Biegevorgang einwirkenden Drehmoment entgegenwirkt und welches vorzugsweise die beiden Wellen nach dem Biegvorgang in ihre Ausganglage vor dem Biegevorgang zurückdreht.7. Die device according to one of claims 1 to 6, characterized in that means (11) are provided for generating a torque acting on the two shafts, preferably adjustable within a certain range, which is the torque acting on the two shafts during the bending process counteracts and which preferably turns the two shafts back into their starting position before the bending process after the bending process. 8. Gesenkvorrichtung nach einem der Ansprüche 5 oder 6 und 7, dadurch gekennzeichnet, dass die genannten Mittel zur Erzeugung des Drehmomentes eine auf die Zahnstange ein­wirkende Druckfeder (11) sind.8. die device according to one of claims 5 or 6 and 7, characterized in that said means for generating the torque are a pressure spring acting on the rack (11). 9. Gesenkvorrichtung nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass die beiden Wellen, sowie sämtliche zu ihrer Zwangskopplung sowie ggf. zur Erzeugung des Drehmomentes erforderlichen Elemente in einem Grundkörper (1) angeordnet, gehaltert bzw. gelagert sind.9. Die device according to one of claims 1 to 8, characterized in that the two shafts, as well as all elements required for their positive coupling and possibly for generating the torque, are arranged, held or supported in a base body (1). 10. Gesenkvorrichtung nach Anspruch 9, dadurch gekennzeichnet, dass der Grundkörper aus mehreren Elementen (17 - 21) zusammensetzbar ist.10. Die device according to claim 9, characterized in that the base body can be assembled from several elements (17-21).
EP90100406A 1989-01-18 1990-01-10 Die device Expired - Lifetime EP0379886B1 (en)

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AT90100406T ATE89201T1 (en) 1989-01-18 1990-01-10 DIE DEVICE.

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CH154/89 1989-01-18
CH15489 1989-01-18

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EP0379886A1 true EP0379886A1 (en) 1990-08-01
EP0379886B1 EP0379886B1 (en) 1993-05-12

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US (1) US5007278A (en)
EP (1) EP0379886B1 (en)
JP (1) JPH02229622A (en)
AT (1) ATE89201T1 (en)
DE (1) DE59001381D1 (en)
ES (1) ES2040509T3 (en)

Cited By (4)

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WO1991013704A1 (en) * 1990-03-15 1991-09-19 Lift Verkaufsgeräte-Gesellschaft M.B.H. Sheet-metal bending device
DE9213532U1 (en) * 1992-10-07 1993-01-28 Haberstock, Rolf, 7897 Kuessaberg, De
US5295384A (en) * 1990-03-15 1994-03-22 Lift Verkaufsgerate Gesellschaft M.B.H. Sheet-metal bending device
CN109226372A (en) * 2018-10-24 2019-01-18 中船黄埔文冲船舶有限公司 A kind of roller trigger steel plate support device

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IL93095A (en) * 1990-01-18 1994-08-26 Lordan & Co Fluid cooling system
GB2278795B (en) * 1993-06-12 1996-10-02 Douglas Roger Hawkey Apparatus and method for working materials
JP3544183B2 (en) * 2001-03-16 2004-07-21 トキワ精機株式会社 Apparatus and method for manufacturing thick curved tube
CN101569907A (en) * 2008-04-28 2009-11-04 鸿富锦精密工业（深圳）有限公司 Bending die

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US2882952A (en) * 1958-02-06 1959-04-21 Carl Parten Die for use in bending flat metal stock and the like
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991013704A1 (en) * 1990-03-15 1991-09-19 Lift Verkaufsgeräte-Gesellschaft M.B.H. Sheet-metal bending device
US5295384A (en) * 1990-03-15 1994-03-22 Lift Verkaufsgerate Gesellschaft M.B.H. Sheet-metal bending device
DE9213532U1 (en) * 1992-10-07 1993-01-28 Haberstock, Rolf, 7897 Kuessaberg, De
CN109226372A (en) * 2018-10-24 2019-01-18 中船黄埔文冲船舶有限公司 A kind of roller trigger steel plate support device

Also Published As

Publication number Publication date
ES2040509T3 (en) 1993-10-16
EP0379886B1 (en) 1993-05-12
JPH02229622A (en) 1990-09-12
US5007278A (en) 1991-04-16
ATE89201T1 (en) 1993-05-15
DE59001381D1 (en) 1993-06-17

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