EP0497778B2 - Device for bending sheet metal - Google Patents

Device for bending sheet metal Download PDF

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Publication number
EP0497778B2
EP0497778B2 EP90912902A EP90912902A EP0497778B2 EP 0497778 B2 EP0497778 B2 EP 0497778B2 EP 90912902 A EP90912902 A EP 90912902A EP 90912902 A EP90912902 A EP 90912902A EP 0497778 B2 EP0497778 B2 EP 0497778B2
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EP
European Patent Office
Prior art keywords
bending
cheek
sheet
bending cheek
pivoting axis
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Expired - Lifetime
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EP90912902A
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German (de)
French (fr)
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EP0497778A1 (en
EP0497778B1 (en
Inventor
Wolfgang Kutschker
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Reinhardt Maschinenbau GmbH
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Reinhardt Maschinenbau GmbH
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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
    • B21D5/04—Bending sheet metal along straight lines, e.g. to form simple curves on brakes making use of clamping means on one side of the work
    • B21D5/042—With a rotational movement of the bending blade

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)

Abstract

PCT No. PCT/EP90/01445 Sec. 371 Date Apr. 7, 1992 Sec. 102(e) Date Apr. 7, 1992 PCT Filed Aug. 30, 1990 PCT Pub. No. WO91/06382 PCT Pub. Date May 16, 1991.A folding machine in which a metal sheet is clamped between an upper and lower clamp, and the section of sheet extending out beyond the clamps is bent through a given angle by a bending cheek. During the rotating motion of the bending cheek, the bending cheek moves into an initial position perpendicular to the axis of rotation. This steers the bending cheek along a given bending contour.

Description

Die Erfindung betrifft eine Vorrichtung zum Biegen eines Bleches nach dem Oberbegriff des Patentanspruchs 1.The invention relates to a device for bending a sheet according to the preamble of patent claim 1.

Eine derartige Vorrichtung ist aus "Fortschritt-Berichte" VDI 129 (1987) S. 37 bis 44 bekannt.Such a device is known from "Progress Reports" VDI 129 (1987) pp. 37 to 44.

Eine weitere Vorrichtung dieser Art ist aus der US-A-4,557,132 bekannt. Bei dieser bekannten Vorrichtung ist die Schwenkachse der Biegewange in einem relativ kurzen, bogenförmigen Schlitz verschieblich, so daß eine Kante der Biegewange im wesentlichen immer an der gleichen Stelle eines zu biegenden Blechabschnitts angreift. Die Erzielung bestimmter, vorgegebener Biegekonturen ist mit der bekannten Maschine nicht möglich. Außerdem muß dort die Biegewange auch auf die jeweilige Blechdicke voreingestellt werden.Another device of this type is known from US-A-4,557,132. In this known device, the pivot axis of the bending cheek is displaceable in a relatively short, arc-shaped slot, so that an edge of the bending cheek essentially always engages in the same place on a sheet metal section to be bent. It is not possible to achieve certain, predetermined bending contours with the known machine. In addition, the bending beam must also be preset there to the respective sheet thickness.

Es ist Aufgabe der Erfindung, eine gattungsgemäße Vorrichtung so zu verbessern, daß ohne Voreinstellung der Schwenkachse der Biegewange in Abhängigkeit von der Blechdicke der Gleitweg zwischen Biegewange und Blech praktisch auf Null reduziert und eine Abrollbewegung der Biegewange auf der Unterseite des Bleches erreicht wird.It is an object of the invention to improve a generic device so that without presetting the pivot axis of the bending beam depending on the sheet thickness, the glide path between the bending beam and sheet is practically reduced to zero and a rolling movement of the bending beam on the underside of the sheet is achieved.

Die Aufgabe wird erfindungsgemäß durch die kennzeichnenden Merkmale des Patentanspruchs 1 gelöst.The object is achieved by the characterizing features of claim 1.

Die nachstehende Beschreibung einer bevorzugten Ausführungsform der Erfindung dient im Zusammenhang mit beiliegender Zeichnung der weiteren Erläuterung. Es zeigen:

Figur 1
schematisch das Biegen eines Bleches und
Figur 2
schematisch eine Schwenkbiegemaschine.
The following description of a preferred embodiment of the invention serves in conjunction with the accompanying drawings for further explanation. Show it:
Figure 1
schematically the bending of a sheet and
Figure 2
schematically a folding machine.

Die Figur 1 zeigt schematisch die Unterwange 1, die Oberwange 2 und die Biegewange 3 einer im übrigen nicht dargestellten, an sich bekannten Biegemaschine. Zwischen Unterwange 1 und Oberwange 2 ist ein Blech 4 eingespannt, das mit einem zu verbiegenden Blechabschnitt 5 über die Vorderkanten der Wangen 1 und 2 hinausragt. Die Biegewange 3 ist im Maschinengestell um eine Achse S schwenkbar gelagert, die in Figur 1 senkrecht zur Zeichnungsebene verläuft.FIG. 1 shows schematically the lower beam 1, the upper beam 2 and the bending beam 3 of a bending machine which is not shown and is known per se. A sheet metal 4 is clamped between the lower beam 1 and the upper beam 2 and projects with a sheet metal section 5 that is to be bent, beyond the front edges of the cheeks 1 and 2. The bending beam 3 is mounted in the machine frame so as to be pivotable about an axis S, which in FIG. 1 runs perpendicular to the plane of the drawing.

Im Ausführungsbeispiel der Figur 1 verläuft die Schwenkachse S wie dargestellt innerhalb des Bleches 4. Bei einer herkömmlichen Schwenkbiegemaschine könnte mit einer solchen Lage der Schwenkachse das Blech nicht gebogen werden, weil bei Ausführung der Schwenkbewegung der Biegewange 3 eine erhebliche Verquetschung des Bleches stattfinden würde. Daher wurde bisher die Schwenkachse S stets etwas außerhalb des Bleches 4 und über der Ober- oder Biegefläche 6 der Biegewange in einem Abstand angeordnet, der etwa gleich dem 1,5-fachen Wert der Dicke des Bleches 4 entsprach.In the exemplary embodiment in FIG. 1, the swivel axis S runs within the sheet 4 as shown. In a conventional swivel bending machine, the sheet could not be bent with such a position of the swivel axis, because if the swivel movement of the bending cheek 3 were carried out, the sheet would be considerably squeezed. Therefore, the pivot axis S has always been arranged somewhat outside of the sheet 4 and above the upper or bending surface 6 of the bending beam at a distance which was approximately equal to 1.5 times the thickness of the sheet 4.

Um eine Verquetschung des Bleches beim Biegen zu vermeiden und eine gleichmäßige, vorgegebene Biegekontur des gebogenen Blechabschnitts 5 zu erreichen, wird erfindungsgemäß die Biegewange 3 während ihrer Verschwenkung in Abhängigkeit vom durchlaufenen Biegewinkel in einer ersten Verstellrichtung senkrecht zur Schwenkachse S und zu ihrer Biegefläche 6 verstellt. Diese Verstellung ist in Figur 1 durch die jeweiligen Pfeile A₁ bis A₄ angedeutet.In order to avoid squeezing the sheet during bending and to achieve a uniform, predetermined bending contour of the bent sheet metal section 5, the bending beam 3 is adjusted according to the invention during its pivoting depending on the bending angle passed in a first adjustment direction perpendicular to the pivot axis S and to its bending surface 6. This adjustment is indicated in Figure 1 by the respective arrows A₁ to A₄.

Vor Einleitung des Biegevorganges nimmt die Biegewange 3 die dem Pfeil A₁ entsprechende Position ein. In einer ersten Phase des Biegevorganges wird die Biegewange 3 in die dem Pfeil A₂ entsprechende Lage verschwenkt und gleichzeitig relativ zur Schwenkachse S und senkrecht hierzu um einen Betrag zurückverschoben, der dem Längenunterschied der Pfeile A₁ und A₂ entspricht. In dieser Phase gleitet die Biegefläche 6 der Wange 3 an der Unterseite des Bleches 4 entlang, wobei jedoch der Gleitreibungsweg zwischen Biegewange 3 und Blech 4 gegenüber einem herkömmlichen Blechbiegen aufgrund der Zurückziehung der Biegewange 3 (vgl. die Pfeile A₁ und A₂) beträchtlich verringert ist, so daß die Oberfläche des Bleches an dessen Unterseite weniger beansprucht und infolgedessen weniger beschädigt wird.Before initiating the bending process, the bending beam 3 assumes the position corresponding to the arrow A 1. In a first phase of the bending process, the bending beam 3 is pivoted into the position corresponding to the arrow A₂ and at the same time moved back relative to the pivot axis S and perpendicularly thereto by an amount which corresponds to the difference in length of the arrows A₁ and A₂. In this phase, the bending surface 6 of the cheek 3 slides along the underside of the sheet 4, but the sliding friction path between the bending cheek 3 and sheet 4 is considerably reduced compared to conventional sheet bending due to the retraction of the bending cheek 3 (cf. arrows A 1 and A 2) , so that the surface of the sheet on the underside is less stressed and consequently less damaged.

Die Verstellung der Biegewange in Richtung senkrecht zur Schwenkachse S während des Durchlaufens des Biegewinkels zwischen den Pfeilen A₁ und A₂ wird erfindungsgemäß so gesteuert, daß die Biegewange an einer vorgegebenen Biegekontur entlanggeführt wird. Hierdurch kann dem Blech 4 im Bereich dieser Kontur eine vorgegebene, insbesondere genau kreisrunde Gestalt verliehen werden, wobei Verquetschungen des Bleches 4, wie gesagt, ausgeschlossen werden können.The adjustment of the bending beam in the direction perpendicular to the pivot axis S while passing through the bending angle between the arrows A₁ and A₂ is controlled according to the invention so that the bending beam is guided along a predetermined bending contour. As a result, the sheet 4 can be given a predetermined, in particular precisely circular shape in the region of this contour, with pinching of the Sheets 4, as I said, can be excluded.

Die Schwenkachse S liegt bei der Ausführungsform der Erfindung nach Figur 1 lediglich beispielhaft innerhalb des Bleches 4. Sie könnte auch an anderer Stelle, insbesondere auch außerhalb des Bleches 4, liegen.In the embodiment of the invention according to FIG. 1, the pivot axis S lies only by way of example within the sheet 4. It could also be located elsewhere, in particular also outside the sheet 4.

Nach Erreichen der dem Pfeil A₂ entsprechenden Lage setzt sich der Biegevorgang fort, bis die Biegewange 3 die dem Pfeil A₃ entsprechende Stellung erreicht hat, in welcher der Blechabschnitt 5 nunmehr um etwa 90° abgebogen ist. Aus dem Längenunterschied der Pfeile A₂ und A₃ erkennt man wieder den Verstellweg der Biegewange 3 relativ zu ihrer Schwenkachse S. Wiederum hat sich hierbei die Biegewange 3 mit reduziertem Gleitweg an der Unterseite des Bleches 4 abgerollt.After reaching the position corresponding to the arrow A₂, the bending process continues until the bending beam 3 has reached the position corresponding to the arrow A₃, in which the sheet metal section 5 is now bent by approximately 90 °. From the difference in length of the arrows A₂ and A₃ you can again see the adjustment path of the bending beam 3 relative to its pivot axis S. Again, the bending beam 3 has rolled off with a reduced sliding path on the underside of the sheet 4.

Schließlich erreicht die Biegewange 3 unter Fortsetzung ihrer Schwenkbewegung die dem Pfeil A₄ entsprechende Position. Der Längenunterschied zwischen den Pfeilen A₃ und A₄ gibt wiederum den Verstellweg der Biegewange senkrecht zu ihrer Schwenkachse S im Verlauf dieser letzten Phase des Schwenkbiegevorganges an.Finally, the bending beam 3 reaches the position corresponding to the arrow A₄ while continuing its pivoting movement. The difference in length between the arrows A₃ and A wiederum in turn indicates the adjustment of the bending beam perpendicular to its pivot axis S in the course of this last phase of the pivot bending process.

In jedem Falle erfolgt die Verstellung der Biegewange 3 in Richtung der Pfeile A so, daß sich eine vorgegebene Biegekontur ergibt, keine Quetschung des Bleches 4 stattfindet und die Gleitreibung zwischen Biegewange 3 und Blech 4 beträchtlich reduziert ist.In any case, the bending beam 3 is adjusted in the direction of the arrows A in such a way that a predetermined bending contour is obtained, the sheet 4 is not crushed and the sliding friction between the bending beam 3 and the sheet 4 is considerably reduced.

Es sei noch einmal darauf hingewiesen, daß bei den herkömmlichen Blechbiegemaschinen der in Figur 1 durch die Pfeile A repräsentierte Abstand der Biegewange 3 von der Schwenkachse S konstant bleibt, während er sich erfindungsgemäß verändert. Diese Veränderung kann beispielsweise programmgesteuert oder auch von Hand erfolgen.It should be pointed out once again that, in the conventional sheet metal bending machines, the distance of the bending beam 3 from the pivot axis S, represented by the arrows A in FIG. 1, remains constant while it changes according to the invention. This change can, for example, be program-controlled or also done manually.

Bei dem beschriebenen Vorgang wird zwar gegenüber herkömmlichen Verfahren der Gleitweg zwischen Biegewange 3 und Blech 4 erheblich reduziert und hierdurch das Blech geschont. Der Gleitweg läßt sich jedoch in der Regel allein durch die Verstellung der Biegewange 3 in Richtung der Pfeile A, also durch ein Zurückziehen der Biegewange 3 von ihrer Schwenkachse S, nicht auf Null reduzieren. Um dies zu erreichen, muß zu der Verstellbewegung der Biegewange 3 in Richtung der Pfeile A noch eine weitere Verstellung hinzutreten, die in Figur 1 durch die Pfeile B angedeutet ist. Diese zweite Verstellung erfolgt in einer Richtung, die stets im wesentlichen senkrecht zu derjenigen Ebene verläuft, welche jeweils durch die erste Verstellrichtung A und die Schwenkachse S definiert ist, und durch die Pfeile B angegeben ist. Bei der Verstellung der Biegewange 3 in Richtung der Pfeile B bewegt sich die Biegewange auf die von den Verstellrichtungen A und der Schwenkachse S definierten Ebenen zu.In the described process, the sliding path between the bending cheek 3 and the sheet 4 is considerably reduced compared to conventional methods, and the sheet is thereby protected. However, the sliding path cannot generally be reduced to zero simply by adjusting the bending beam 3 in the direction of the arrows A, that is to say by pulling the bending beam 3 back from its pivot axis S. In order to achieve this, a further adjustment, which is indicated by the arrows B in FIG. 1, must be added to the adjustment movement of the bending cheek 3 in the direction of the arrows A. This second adjustment takes place in a direction which is always substantially perpendicular to the plane which is defined by the first adjustment direction A and the pivot axis S and is indicated by the arrows B. When the bending beam 3 is adjusted in the direction of the arrows B, the bending beam moves to the planes defined by the adjustment directions A and the pivot axis S.

Hierdurch läßt sich eine vollkommene Abrollbewegung der Biegewange 3 auf der Unterseite des Bleches 4 in einer Weise erreichen, daß der Gleitweg zwischen Biegewange 3 und Blech 4 praktisch auf Null reduziert ist.In this way, a complete rolling movement of the bending cheek 3 on the underside of the sheet 4 can be achieved in such a way that the sliding path between the bending cheek 3 and sheet 4 is practically reduced to zero.

Die Figur 2 zeigt schematisch in Vorderansicht die rechte Seite einer Schwenkbiegemaschine 10 mit Maschinengestell 11 und denjeweils rechten Stirnseiten der Oberwange 2 und der Biegewange 3 (die Unterwange 1 ist durch die Biegewange 3 verdeckt). Die in Figur 2 nicht dargestellte, linke Stirnseite der Schwenkbiegemaschine stellt sich in entsprechender, spiegelbildlicher Gestalt dar.FIG. 2 schematically shows a front view of the right side of a folding machine 10 with a machine frame 11 and the right end faces of the upper beam 2 and the bending beam 3 (the lower beam 1 is covered by the bending beam 3). The left end face of the folding machine, which is not shown in FIG. 2, is represented in a corresponding, mirror-image form.

Ein Hydraulikzylinder 12 dient der Vertikalverschiebung der Oberwange 2 beim Spannen und Lösen des Bleches 4, vgl. die Pfeile G. Die Biegewange 3 ist um die Schwenkachse S mit Hilfe eines Motors 13 verschwenkbar, vgl. die Pfeile H.A hydraulic cylinder 12 is used for vertical displacement of the upper beam 2 when the sheet 4 is tensioned and released, cf. the arrows G. The bending beam 3 can be pivoted about the pivot axis S with the aid of a motor 13, cf. the arrows H.

Durch den Motor 13 ist zunächst eine erste, drehbar am Maschinengestell 11 gelagerte Schwinge 14 um die Schwenkachse S verschwenkbar. An dieser ersten Schwinge 14 ist um eine Achse 15 schwenkbar eine zweite Schwinge 16 drehbar gelagert. Wie dargestellt, liegt die Drehachse 15 der zweiten Schwinge 16 unterhalb der Schwenkachse S der ersten Schwinge 14.First, a first rocker 14 rotatably mounted on the machine frame 11 can be pivoted about the pivot axis S by the motor 13. On this first rocker 14, a second rocker 16 is pivotally mounted about an axis 15. As shown, the axis of rotation 15 of the second rocker 16 lies below the pivot axis S of the first rocker 14.

Zwischen dem vorstehenden Fuß 17 der zweiten Schwinge 16 und der Biegewange 3 ist ein Kolben-Zylinder-Aggregat 18 vorgesehen, dessen Zylindergehäuse 19 mit der Biegewange 3 und dessen Kolbenstange 21 mit dem Fuß 17 fest verbunden sind. Auf diese Weise vermittelt das Kolben-Zylinder-Aggregat 18 eine Längsführung der Biegewange 3 auf der zweiten Schwinge 16, so daß die Biegewange 3 bei Betätigung des Aggregats 18 in Richtung der Pfeile I, die den Pfeilen A₁ bis A₄ in Figur 1 entsprechen, senkrecht zur Schwenkachse S verstellbar ist.A piston-cylinder unit 18 is provided between the projecting foot 17 of the second rocker 16 and the bending cheek 3, the cylinder housing 19 of which is firmly connected to the bending cheek 3 and the piston rod 21 of which is firmly connected to the foot 17. In this way, the piston-cylinder unit 18 provides a longitudinal guide of the bending beam 3 on the second rocker 16, so that the bending beam 3 when actuating the unit 18 in the direction of arrows I, which correspond to the arrows A₁ to A₄ in Figure 1, perpendicular is adjustable to the swivel axis S.

Die Schwinge 16 ist mit Hilfe eines in Figur 2 lediglich angedeuteten Antriebsmotors 22 um die Achse 15 relativ zur ersten Schwinge 14 verdrehbar. Diese Verdrehung liefert die im Zusammenhang mit Figur 1 bereits erläuterte Verstellbewegung in Richtung der Pfeile B₁ bis B₄, welche senkrecht zu der die Pfeile I und die Schwenkachse S enthaltenden Ebene erfolgt (diese Ebene ist in Figur 2 die Zeichnungsebene).The rocker 16 can be rotated about the axis 15 relative to the first rocker 14 with the aid of a drive motor 22 which is only indicated in FIG. This rotation provides the adjustment movement already explained in connection with FIG. 1 in the direction of arrows B₁ to B₄, which is perpendicular to the plane containing the arrows I and the pivot axis S (this plane is the plane of the drawing in FIG. 2).

Die Längsführung der Biegewange 3 entlang den Pfeilen A kann selbstverständlich auch in anderer Weise als in Figur 2 dargestellt ausgebildet werden, wobei insbesondere auch ein anderer Antriebsmotor Verwendung finden kann. Entsprechendes gilt für die Verstellung der zweiten Schwinge 16 relativ zur ersten Schwinge 14, die beispielsweise ebenfalls mit Hilfe einer senkrecht zur Zeichnungsebene der Figur 2 verlaufenden Geradführung erfolgen könnte. Insbesondere könnte auch das Zylindergehäuse 19 in einer Längsführung an der zweiten Schwinge 16 in Richtung der Pfeile I gleitverschieblich geführt sein.The longitudinal guide of the bending beam 3 along the arrows A can of course also be designed in a different way than shown in Figure 2, wherein in particular another drive motor can be used. The same applies to the adjustment of the second rocker 16 relative to the first rocker 14, which could also be carried out, for example, with the aid of a straight guide perpendicular to the plane of the drawing in FIG. In particular, the cylinder housing 19 could be in a longitudinal guide on the second rocker 16 to be slidably guided in the direction of arrows I.

In jedem Falle läßt sich die Biegewange 3 in Richtung der Pfeile A und B während des Biegevorgangs verstellen, so daß die oben bereits erwähnten Vorteile erreicht werden. Die für die Verstellung erforderlichen Antriebsmotore, beispielsweise das Kolben-Zylinder-Aggregat 18 und der Motor 22, werden vorzugsweise anhand eines vorgegebenen Programmes entsprechend der gewünschten Biegekontur gesteuert. Bei einfachen Schwenkbiegemaschinen ist auch eine Handsteuerung möglich.In any case, the bending beam 3 can be adjusted in the direction of arrows A and B during the bending process, so that the advantages already mentioned above are achieved. The drive motors required for the adjustment, for example the piston-cylinder unit 18 and the motor 22, are preferably controlled on the basis of a predetermined program in accordance with the desired bending contour. Manual control is also possible with simple folding machines.

Falls lediglich eine Verstellbewegung der Biegewange 3 in Richtung der Pfeile A₁ bis A₄ bzw. I gewünscht wird, also ohne Verstellbarkeit der Biegewange 3 in Richtung der Pfeile B₁ bis B₄, kann die Geradführung in Gestalt des Kolben-Zylinder-Aggregats 18 auch unmittelbar zwischen der ersten Schwinge 14 und der Biegewange 3 vorgesehen werden. Die zweite Schwinge 16 entfällt dann.If only an adjustment movement of the bending beam 3 in the direction of arrows A₁ to A₄ or I is desired, that is to say without adjustability of the bending beam 3 in the direction of arrows B₁ to B₄, the straight guide in the form of the piston-cylinder unit 18 can also be used directly between the first rocker 14 and the bending beam 3 are provided. The second rocker 16 is then omitted.

Claims (2)

  1. A device for bending a metal sheet (4) with a machine frame, a lower cheek (1), an upper cheek (2) and a bending cheek (3), where the sheet (4) is clamped between the lower and upper cheek (1, 2) and a sheet portion projecting over these cheeks (1, 2) is bent about a predetermined pivoting angle with the aid of the bending cheek (3), which acts upon this sheet portion and is pivotable about a pivoting axis (S), and which - during this pivoting movement - is simultaneously adjustable in a first adjusting direction (A) perpendicular to its pivoting axis (S), the pivoting axis (S) being stationary and the bending cheek (3) being designed so that its spacing from the pivoting axis (S) increases during the bending process, whereby the bending cheek (3) can thus be steered along a predetermined bending contour, characterised in that,
    during its pivoting movement, the bending cheek (3) is additionally adjustable in a second adjusting direction (B), which extends substantially perpendicular to the plane comprising the first adjusting direction (A) and the pivoting axis (S), and in that the device is provided with a control means controlling the bending cheek during the bending process in such a manner that the sliding path between bending cheek and sheet is practically reduced to zero and a rolling movement of the bending cheek on the lower side of the sheet is achieved.
  2. A device according to Claim 1, characterised in that
    each of the two front sides of the bending cheek (3) is guided in a substantially rectilinear manner in a guide (18) extending perpendicular to the pivoting axis (S) and this guide (18) is arranged on a first rocker arm (14), which is mounted on the machine frame (11) so as to pivot about the pivoting axis (S) and in that the guide (18) of the bending cheek (3) is arranged on a second rocker arm (16), which is in turn mounted movably on the first rocker arm (14).
EP90912902A 1989-10-26 1990-08-30 Device for bending sheet metal Expired - Lifetime EP0497778B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE3935659 1989-10-26
DE3935659A DE3935659C3 (en) 1989-10-26 1989-10-26 Device for bending a sheet
PCT/EP1990/001445 WO1991006382A1 (en) 1989-10-26 1990-08-30 Device for bending sheet metal

Publications (3)

Publication Number Publication Date
EP0497778A1 EP0497778A1 (en) 1992-08-12
EP0497778B1 EP0497778B1 (en) 1993-07-28
EP0497778B2 true EP0497778B2 (en) 1996-02-21

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EP90912902A Expired - Lifetime EP0497778B2 (en) 1989-10-26 1990-08-30 Device for bending sheet metal

Country Status (9)

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US (1) US5239853A (en)
EP (1) EP0497778B2 (en)
JP (1) JP2930714B2 (en)
AT (1) ATE91927T1 (en)
CA (1) CA2067118C (en)
DE (1) DE3935659C3 (en)
DK (1) DK0497778T4 (en)
ES (1) ES2042306T5 (en)
WO (1) WO1991006382A1 (en)

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EP1810761A1 (en) * 2006-01-24 2007-07-25 Ralf Beger Sheet folding device
DE102008064227B3 (en) * 2008-12-22 2010-05-27 Ralf Beger A method for folding a sheet metal part in a Blechabkantvorrichtung and suitable for performing this method Blechabkantvorrichtung for folding a sheet metal part
DE102013106764A1 (en) 2013-06-27 2014-12-31 Ras Reinhardt Maschinenbau Gmbh Handling device and bending machine and method for bending a bent part

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* Cited by examiner, † Cited by third party
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DE19529126A1 (en) * 1995-08-08 1997-02-13 Reinhardt Gmbh Maschbau Device for bending a sheet
DE19901794A1 (en) * 1999-01-19 2000-07-27 Reinhardt Gmbh Maschbau Bending machine for flat materials has bending nose with curved pressure surface to engage on one side of flat material
US6439020B1 (en) 2001-03-30 2002-08-27 Baschnagel, Iii Robert J. Gutter forming machine
US6571594B2 (en) 2001-11-02 2003-06-03 Tapco International, Inc. Open back brake
DE10245777A1 (en) * 2002-09-26 2004-04-08 Reinhardt Maschinenbau Gmbh A bending machine for metal sheets has an interchangeable bending tool mounted on a number of wedge blocks by which fine adjustment may be made
US20050183488A1 (en) * 2004-02-19 2005-08-25 Cheng-Chung Chen Plate and tube bending device
NZ564570A (en) * 2007-12-18 2010-02-26 Scott Technology Ltd Metal folding apparatus
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CN102527783B (en) * 2011-12-30 2014-07-30 东莞新能德科技有限公司 Bent battery pole piece clamp
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Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2782832A (en) * 1955-04-26 1957-02-26 Pedrick Tool And Machine Co Bending machines
FR2160702B3 (en) * 1971-11-22 1974-08-19 Wendel Sidelor
DE2630896C3 (en) * 1976-07-09 1979-10-04 Balcke-Duerr Ag, 4030 Ratingen Device for bending large components
US4493200A (en) * 1983-03-10 1985-01-15 Tapco Products Company, Inc. Portable sheet bending brake
US4557132A (en) * 1984-02-03 1985-12-10 Tapco Products Company, Inc. Sheet bending brake
FR2597398B1 (en) * 1986-04-16 1990-12-07 Favrin Pierre PIVOTING APRON BENDING PRESS

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1810761A1 (en) * 2006-01-24 2007-07-25 Ralf Beger Sheet folding device
DE102008064227B3 (en) * 2008-12-22 2010-05-27 Ralf Beger A method for folding a sheet metal part in a Blechabkantvorrichtung and suitable for performing this method Blechabkantvorrichtung for folding a sheet metal part
DE102013106764A1 (en) 2013-06-27 2014-12-31 Ras Reinhardt Maschinenbau Gmbh Handling device and bending machine and method for bending a bent part
US10427893B2 (en) 2013-06-27 2019-10-01 Ras Reinhardt Maschinenbau Gmbh Handling device and bending installation and method for bending a part to be bent

Also Published As

Publication number Publication date
EP0497778A1 (en) 1992-08-12
JPH05500775A (en) 1993-02-18
ATE91927T1 (en) 1993-08-15
DK0497778T4 (en) 1996-04-15
JP2930714B2 (en) 1999-08-03
CA2067118A1 (en) 1991-04-27
EP0497778B1 (en) 1993-07-28
ES2042306T3 (en) 1993-12-01
DE3935659C2 (en) 1993-02-18
CA2067118C (en) 2000-04-25
WO1991006382A1 (en) 1991-05-16
US5239853A (en) 1993-08-31
DE3935659A1 (en) 1991-05-02
ES2042306T5 (en) 1996-05-01
DE3935659C3 (en) 1997-01-02

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