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EP0109031B1 - Method of and tool for bending the marginal sections of sheet metal - Google Patents

Method of and tool for bending the marginal sections of sheet metal Download PDF

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Publication number
EP0109031B1
EP0109031B1 EP83111121A EP83111121A EP0109031B1 EP 0109031 B1 EP0109031 B1 EP 0109031B1 EP 83111121 A EP83111121 A EP 83111121A EP 83111121 A EP83111121 A EP 83111121A EP 0109031 B1 EP0109031 B1 EP 0109031B1
Authority
EP
European Patent Office
Prior art keywords
sheet metal
bending
tool
edge
sheet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP83111121A
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German (de)
French (fr)
Other versions
EP0109031A2 (en
EP0109031A3 (en
Inventor
Finn Lennart Jonsson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ABB Norden Holding AB
Original Assignee
ASEA AB
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Filing date
Publication date
Application filed by ASEA AB filed Critical ASEA AB
Priority to AT83111121T priority Critical patent/ATE26933T1/en
Publication of EP0109031A2 publication Critical patent/EP0109031A2/en
Publication of EP0109031A3 publication Critical patent/EP0109031A3/en
Application granted granted Critical
Publication of EP0109031B1 publication Critical patent/EP0109031B1/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/01—Bending sheet metal along straight lines, e.g. to form simple curves between rams and anvils or abutments
    • 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
    • B21D19/00—Flanging or other edge treatment, e.g. of tubes
    • B21D19/08—Flanging or other edge treatment, e.g. of tubes by single or successive action of pressing tools, e.g. vice jaws

Definitions

  • the invention relates to a method according to the preamble of claim 1 and a tool for carrying out the method according to the preamble of claim 2.
  • a method is known from DE-A-3 011 665.
  • the sheet When forming an approximately 20 to 200 mm thick sheet into a cylindrical container, the sheet is bent by rolling or successive bending in a hydraulic press, in which the sheet is placed on two elongated cushions, one elongated punch arranged between the two cushions Exerts pressing force on the sheet.
  • the edge sections of the sheet cannot be bent into the desired shape in this way. Rather, an unbent flat edge section remains, which is at least twice as wide as the sheet thickness.
  • a sheet metal edge bending press which essentially consists of two lateral stands and a bending beam lying between them, which is rotatably supported at one end between the two side stands and at its other end by means of a drive is movable above.
  • the bending beam carries a lower die and the two side stands carry an upper die by means of corresponding upwardly protruding brackets. These dies are essentially aligned in the vertical direction. The sheet is inserted into the opening between the two dies and then the bending beam is moved upwards. The two dies have the exact shape into which the sheet metal edge to be bent is to be pressed.
  • the invention has for its object to develop a method for bending the edge portions of a sheet, which can be carried out with a simple bending tool, is simple and cheap and reduces the risk of undesirable deformation of the sheet edge during bending. Furthermore, an easily transportable bending tool suitable for carrying out this method is to be created.
  • the bending tool according to the invention is placed with its U-shaped bracket on the sheet metal in such a way that the bracket engages around the sheet edge, two elongated rulers or pillows arranged in the bracket being located near the surface on the top and bottom of the sheet.
  • One ruler is further away from the outermost edge of the sheet than the other ruler.
  • the longer leg of the bending tool is provided with an actuating device, which preferably consists of one or more hydraulic cylinder - piston arrangements. These act on the sheet and tilt the tool in such a way that the two rulers are pressed against the sheet at different distances from the outer sheet edge and thereby bend the edge of the sheet.
  • the tool can have the same length as the sheet. However, the tool is preferably shorter than the sheet, which can be very long, for example 10 to 15 m. The tool is then gradually moved along the edge of the sheet and bends a short part of the sheet edge with each step.
  • the bending tool according to the invention is expediently designed as a U-shaped (or J-shaped) bracket with a long leg, which is located above the sheet to be bent when using the tool, and a short leg, which is located under the application the sheet metal.
  • a U-shaped (or J-shaped) bracket with a long leg, which is located above the sheet to be bent when using the tool, and a short leg, which is located under the application the sheet metal.
  • the two rulers or tool cushions In the part of the bracket to be pushed over the sheet metal edge are the two rulers or tool cushions, the upper of which is closer to the connecting web of the two legs of the U-shaped bracket than the lower. This creates a suitable lever arm when bending.
  • the lower ruler is preferably displaceable so that different distances between the rulers and thus lever arms of different lengths can be set.
  • the longer leg of the tool can be provided with running wheels and guide rollers which allow the tool to be moved by hand or by a drive along the edge of the sheet like a
  • 1 denotes a sheet which is placed on a horizontal table 2.
  • the bending tool 3 is constructed from a U-shaped, relatively wide bracket 4 with a long leg 4a and a short leg 4b, which form an opening 5 between them.
  • the tool 3 is provided with two pairs of impellers 6, each on a shaft 7, which are mounted in fork-shaped brackets 8 on the sides of the long leg 4a.
  • the shafts 7 are connected to a power transmission arrangement 10 which is driven by a drive motor 11.
  • the bracket 4 also has guide rollers 12 rotating about vertically directed axes, which are supported by brackets 13. These guide rollers run on the narrow edge surfaces of the sheet 1.
  • An upper ruler 14 and a lower ruler 15 are arranged in the opening 5 of the bracket 1.
  • the lower ruler 15 has a greater distance from the bottom of the opening 5 than the upper ruler 14, so that a lever arm L required for bending is formed (FIG. 2).
  • the lower ruler 15 can be arranged displaceably with the aid of an actuating cylinder arranged on each side of the bracket 4, as shown in FIG. In this way, the ruler 15 can be moved between the position shown in FIG. 4 and indicated by dash-dotted lines, as a result of which the length of the lever arm L changes.
  • the contact surfaces of the two rulers acting as cushions intended for contact with the sheet can expediently be adapted to the desired radius of curvature of the sheet, that is to say the upper, cylindrical concave and the lower, cylindrical convex surface.
  • the cushion rulers can be interchangeable for different sheet thicknesses and radii of curvature.
  • the cushion rulers are expediently chamfered at the ends (chamfered) so that the ruler ends do not leave any pressure points in the sheet.
  • Openings 17 and 18 are provided in leg 4a of bracket 4.
  • Cross pieces 20 run in the openings 18, in which a hydraulic cylinder 21 is pivotally mounted with the pin 22.
  • the piston rod 23 of the cylinder 21 is directed downward and is pressed against the sheet metal 1 when the piston-cylinder arrangement is actuated.
  • the tool 3 is used as follows: It is placed on the sheet 1 so that it engages around a sheet edge.
  • the cylinder 21 is actuated, the piston rod 23 pressing against the sheet.
  • the tool is tilted from the position shown in FIG. 2 to that shown in FIG. 3, the edge of the sheet 1 being bent by a desired radius by a desired angle.
  • Several bends can be carried out with lever arms L of different lengths. The bending can begin at one end of the sheet and can be carried out successively along the entire length of the sheet side by gradually moving the tool along the sheet side, as shown by the dash-dotted line in FIG. 1.
  • the step-by-step drawing bends can partially overlap.
  • the side shift between two bends can be, for example, 60 to 90% of the tool width.
  • the tool is easy to handle and transport and can replace large, expensive stationary press equipment in many cases, especially in small and medium-sized series.
  • the legs 4a, 4b of the U-shaped bracket are preferably designed such that their inner sides diverge in the direction of the opening of the U-shaped leg, as can be seen from FIGS. 2 to 4. This widening of the leg distance to the opening of the U-shaped leg makes it easier to place the tool on the edge of the sheet and to use the same tool for sheets of different thicknesses.

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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)

Abstract

For bending the edge of a thick sheet of metal a tool comprising a yoke with a long and a short leg with plate-engaging bars in the opening between the legs is used. The tool is placed on a sheet so as to straddle the edge to be bent with one bar on each side of the sheet. An extensible member, for example a hydraulic cylinder, bears against the sheet to tilt the yoke so that the bars are pressed against the sheet to bend it. The tool may be provided with transport wheels and drive equipment for automatically moving the tool on the sheet.

Description

Die Erfindung betrifft ein Verfahren gemäß dem Oberbegriff des Anspruches 1, sowie ein Werkzeug zur Durchführung des Verfahrens gemäß Oberbegriff des Anspruches 2. Ein solches Verfahren ist bekannt aus der DE-A-3 011 665.The invention relates to a method according to the preamble of claim 1 and a tool for carrying out the method according to the preamble of claim 2. Such a method is known from DE-A-3 011 665.

Beim Formen eines ca. 20 bis 200 mm dicken Bleches zu einem zylindrischen Behälter wird das Blech durch Walzen oder sukzessives Biegen in einer hydraulischen Presse gebogen, in welcher das Blech auf zwei langgestreckten Kissen plaziert wird, wobei ein zwischen den beiden Kissen angeordneter langgestreckter Stempel eine Preßkraft auf das Blech ausübt. Die Randabschnitte des Bleches können auf diese Weise nicht in die gewünschte Form gebogen werden. Vielmehr bleibt ein ungebogener flacher Randabschnitt übrig, der mindestens doppelt so breit wie die Blechdicke ist. Diese Schwierigkeiten nehmen mit steigender Blechdicke zu und sind besonders groß, wenn die Blechdicke 70 bis 80 mm übersteigt. Bei bekannten Verfahren zum Biegen von Randabschnitten wird das Blech von den konvexen Flächen der Kissen oder Walzen hohen spezifischen Drücken ausgesetzt, die ein Verschieben des Blechmaterials verursachen können. Besonders bei einem gleichzeitigen Gleiten zwischen dem Blech und dem äußersten Formkissen ist die Gefahr einer unerwünschten Verformung des Blechrandes groß. Dies ist ein besonders großer Nachteil, wenn ein Blechrand sorgfältig für eine Schweißnaht bearbeitet ist.When forming an approximately 20 to 200 mm thick sheet into a cylindrical container, the sheet is bent by rolling or successive bending in a hydraulic press, in which the sheet is placed on two elongated cushions, one elongated punch arranged between the two cushions Exerts pressing force on the sheet. The edge sections of the sheet cannot be bent into the desired shape in this way. Rather, an unbent flat edge section remains, which is at least twice as wide as the sheet thickness. These difficulties increase with increasing sheet thickness and are particularly great when the sheet thickness exceeds 70 to 80 mm. In known methods for bending edge sections, the sheet metal is exposed to high specific pressures by the convex surfaces of the cushions or rollers, which can cause the sheet material to shift. Particularly when there is simultaneous sliding between the sheet and the outermost molded cushion, the risk of undesired deformation of the sheet edge is great. This is a particularly big disadvantage if a sheet metal edge is carefully machined for a weld.

Aus der DE-A-3 011 665 ist eine Blechrandabbiegepresse bekannt, die im wesentlichen aus zwei seitlichen Ständern und einer zwischen diesen liegenden Biegewange besteht, welche mit ihrem einen Ende zwischen den beiden Seitenständern drehbar gelagert ist und an ihrem anderen Ende mittels eines Antriebes nach oben bewegbar ist. Die Biegewange trägt ein Untergesenk und die beiden Seitenständer tragen über entsprechende nach oben ausladende Bügel ein Obergesenk. Diese Gesenke fluchten im wesentlichen in vertikaler Richtung. In die Öffnung zwischen den beiden Gesenken wird das Blech eingeschoben, und anschließend wird die Biegewange nach oben bewegt. Die beiden Gesenke haben exakt die Form, in die der abzubiegende Blechrand gepreßt werden soll.From DE-A-3 011 665 a sheet metal edge bending press is known which essentially consists of two lateral stands and a bending beam lying between them, which is rotatably supported at one end between the two side stands and at its other end by means of a drive is movable above. The bending beam carries a lower die and the two side stands carry an upper die by means of corresponding upwardly protruding brackets. These dies are essentially aligned in the vertical direction. The sheet is inserted into the opening between the two dies and then the bending beam is moved upwards. The two dies have the exact shape into which the sheet metal edge to be bent is to be pressed.

Der Erfindung liegt die Aufgabe zugrunde ein Verfahren zum Biegen der Randabschnitte eines Bleches zu entwickeln, das mit einem einfachen Biegewerkzeug ausführbar ist, einfach und billig ist und die Gefahr unerwünschter Verformungen des Blechrandes beim Biegen vermindert. Ferner soll ein für die Durchführung dieses Verfahrens geeignetes leicht transportierbares Biegewerkzeug geschaffen werden.The invention has for its object to develop a method for bending the edge portions of a sheet, which can be carried out with a simple bending tool, is simple and cheap and reduces the risk of undesirable deformation of the sheet edge during bending. Furthermore, an easily transportable bending tool suitable for carrying out this method is to be created.

Zur Lösung der vorgenannten Aufgabe wird ein Verfahren zum Biegen von Randabschnitten eines Bleches vorgeschlagen, welches die im Anspruch 1 genannten Merkmale hat.To achieve the aforementioned object, a method for bending edge sections of a sheet is proposed, which has the features mentioned in claim 1.

Ferner wird ein Biegewerkzeug zur Durchführung des Verfahrens vorgeschlagen, das gemäß der Erfindung die im Anspruch 2 genannten Merkmale hat.Furthermore, a bending tool for carrying out the method is proposed, which according to the invention has the features mentioned in claim 2.

Vorteilhafte Ausgestaltungen dieses Biegewerkzeuges sind in den Ansprüchen 3 bis 6 genannt.Advantageous embodiments of this bending tool are mentioned in claims 3 to 6.

Das Biegewerkzeug gemäß der Erfindung wird mit seinem U-förmigen Bügel derart auf dem Blech plaziert, daß der Bügel den Blechrand umgreift, wobei sich zwei im Bügel angeordnete langgestreckte Lineale oder Kissen nahe der Oberfläche auf der Ober- und Unterseite des Bleches befinden. Das eine Lineal befindet sich dabei weiter vom äußersten Blechrand entfernt als das andere Lineal. Der längere Schenkel des Biegewerkzeugs ist mit einer Betätigungsvorrichtung versehen, die vorzugsweise aus einer oder mehreren hydraulischen Zylinder-Kolbenanord- nungen besteht. Diese wirken auf das Blech ein und kippen das Werkzeug derart, daß die beiden Lineale in verschiedenen Abständen vom aüßeren Blechrand gegen das Blech gepreßt werden und dabei den Rand des Bleches umbiegen. Das Werkzeug kann dieselbe Länge wie das Blech haben. Vorzugsweise ist das Werkzeug jedoch kürzer als das Blech, welches sehr lang sein kann, beispielsweise 10 bis 15 m. Das Werkzeug wird dann schrittweise längs des Blechrandes verschoben und biegt bei jedem Schritt einen kurzen Teil des Blechrandes.The bending tool according to the invention is placed with its U-shaped bracket on the sheet metal in such a way that the bracket engages around the sheet edge, two elongated rulers or pillows arranged in the bracket being located near the surface on the top and bottom of the sheet. One ruler is further away from the outermost edge of the sheet than the other ruler. The longer leg of the bending tool is provided with an actuating device, which preferably consists of one or more hydraulic cylinder - piston arrangements. These act on the sheet and tilt the tool in such a way that the two rulers are pressed against the sheet at different distances from the outer sheet edge and thereby bend the edge of the sheet. The tool can have the same length as the sheet. However, the tool is preferably shorter than the sheet, which can be very long, for example 10 to 15 m. The tool is then gradually moved along the edge of the sheet and bends a short part of the sheet edge with each step.

Das Biegewerkzeug gemäß der Erfindung ist zweckmäßigerweise als ein U-förmiger (oder J-förmiger) Bügel ausgebildet mit einem langen Schenkel, der sich bei der Verwendung des Werkzeuges oberhalb des zu biegenden Bleches befindet, und einem kurzen Schenkel, der sich bei der Anwendung unter dem Blech befindet. In dem über die Blechkante zu schiebenden Teil des Bügels befinden sich die beiden Lineale oder Werkzeugkissen, von denen das obere dichter am Verbindungssteg der beiden Schenkel des U-förmigen Bügels liegt als das untere. Dadurch entsteht beim Biegen ein geeigneter Hebelarm. Das untere Lineal ist vorzugsweise verschiebbar, so daß man verschiedene Abstände zwischen den Linealen und damit verschieden lange Hebelarme einstellen kann. Der längere Schenkel des Werkzeugs kann mit Laufrädern und Führungsrollen versehen sein, die es gestatten, das Werkzeug wie einen Wagen längs des Blechrandes von Hand oder durch einen Antrieb zu verschieben.The bending tool according to the invention is expediently designed as a U-shaped (or J-shaped) bracket with a long leg, which is located above the sheet to be bent when using the tool, and a short leg, which is located under the application the sheet metal. In the part of the bracket to be pushed over the sheet metal edge are the two rulers or tool cushions, the upper of which is closer to the connecting web of the two legs of the U-shaped bracket than the lower. This creates a suitable lever arm when bending. The lower ruler is preferably displaceable so that different distances between the rulers and thus lever arms of different lengths can be set. The longer leg of the tool can be provided with running wheels and guide rollers which allow the tool to be moved by hand or by a drive along the edge of the sheet like a carriage.

Anhand der in den Figuren gezeigten Ausführungsbeispiele soll die Erfindung näher erläutert werden. Es zeigen

  • Figur 1 eine Draufsicht auf das Biegewerkzeug in Richtung der Pfeile A-A in Figur 2, wobei das Biegewerkzeug auf ein Blech aufgesetzt ist,
  • Figur 2 und 3 eine Seitenansicht in Richtung der Pfeile B in Figur 1 vor bzw. während des Biegevorgangs,
  • Figur4 eine andere Ausführungsform gemäß der Erfindung mit einem verschiebbaren Biegelineal.
The invention will be explained in more detail with reference to the exemplary embodiments shown in the figures. Show it
  • 1 shows a plan view of the bending tool in the direction of the arrows AA in FIG. 2, the bending tool being placed on a metal sheet,
  • 2 and 3 show a side view in the direction of the arrows B in FIG. 1 before and during the bending process,
  • Figure4 shows another embodiment according to the invention with a movable bend neal.

In den Figuren bezeichnet 1 ein Blech, das auf einem horizontalen Tisch 2 plaziert ist. Das Biegewerkzeug 3 ist aus einem U-förmigen, verhältnismäßig breiten Bügel 4 mit einem langen Schenkel 4a und einem kurzen Schenkel 4b aufgebaut, welche zwischen sich eine Öffnung 5 bilden. Das Werkzeug 3 ist mit zwei Paaren auf je einer Welle 7 sitzenden Laufrädern 6 versehen, die in gabelförmigen Konsolen 8 an den Seiten des langen Schenkels 4a gelagert sind. Die Wellen 7 sind an eine Kraftübertragungsanordnung 10 angeschlossen, die von einem Antriebsmotor 11 angetrieben wird. Der Bügel 4 hat auch um vertikal gerichtete Achsen rotierende Führungsrollen 12, die von Konsolen 13 getragen werden. Diese Führungsrollen laufen auf den schmalen Kantenflächen des Bleches 1.In the figures, 1 denotes a sheet which is placed on a horizontal table 2. The bending tool 3 is constructed from a U-shaped, relatively wide bracket 4 with a long leg 4a and a short leg 4b, which form an opening 5 between them. The tool 3 is provided with two pairs of impellers 6, each on a shaft 7, which are mounted in fork-shaped brackets 8 on the sides of the long leg 4a. The shafts 7 are connected to a power transmission arrangement 10 which is driven by a drive motor 11. The bracket 4 also has guide rollers 12 rotating about vertically directed axes, which are supported by brackets 13. These guide rollers run on the narrow edge surfaces of the sheet 1.

In der Öffnung 5 des Bügels 1 ist ein oberes Lineal 14 und ein unteres Lineal 15 angeordnet. Das untere Lineal 15 hat einen größeren Abstand vom Boden der Öffnung 5 als das obere Lineal 14, so daß sich ein für das Biegen erforderlicher Hebelarm L bildet (Figur 2). Das untere Lineal 15 kann mit Hilfe eines auf jeder Seite des Bügels 4 angeordneten Betätigungszylinder verschiebbar angeordnet sein, so wie es in Figur4 gezeigt ist. Auf diese Weise kann das Lineal 15 zwischen der in Figur4 dargestellten und strichpunktiert angedeuteten Lage verschoben werden, wodurch sich die Länge des Hebelarms L verändert.An upper ruler 14 and a lower ruler 15 are arranged in the opening 5 of the bracket 1. The lower ruler 15 has a greater distance from the bottom of the opening 5 than the upper ruler 14, so that a lever arm L required for bending is formed (FIG. 2). The lower ruler 15 can be arranged displaceably with the aid of an actuating cylinder arranged on each side of the bracket 4, as shown in FIG. In this way, the ruler 15 can be moved between the position shown in FIG. 4 and indicated by dash-dotted lines, as a result of which the length of the lever arm L changes.

Die zur Anlage an dem Blech bestimmten Anlageflächen der beiden als Kissen wirkenden Lineale können zweckmäßigerweise dem gewünschten Krümmungsradius des Bleches, also der oberen zylindrisch konkaven und der unteren zylindrisch konvexen Fläche angepaßt sein. Die Kissenlineale können für verschiedene Blechdicken und Krümmungsradien austauschbar sein. Die Kissenlineale sind zweckmäßigerweise an den Enden leicht angefast (abgeschrägt), damit die Linealenden keine Druckstellen in dem Blech hinterlassen. Im Schenkel 4a des Bügels 4 sind Öffnungen 17 und 18 vorhanden. In den Öffnungen 18 laufen Querstücke 20, in denen ein hydraulischer Zylinder 21 mit dem Zapfen 22 schwenkbar gelagert ist. Die Kolbenstange 23 des Zylinders 21 ist nach unten gerichtet und wird bei der Betätigung der Kolben-Zylinderanordnung gegen das Blech 1 gedrückt.The contact surfaces of the two rulers acting as cushions intended for contact with the sheet can expediently be adapted to the desired radius of curvature of the sheet, that is to say the upper, cylindrical concave and the lower, cylindrical convex surface. The cushion rulers can be interchangeable for different sheet thicknesses and radii of curvature. The cushion rulers are expediently chamfered at the ends (chamfered) so that the ruler ends do not leave any pressure points in the sheet. Openings 17 and 18 are provided in leg 4a of bracket 4. Cross pieces 20 run in the openings 18, in which a hydraulic cylinder 21 is pivotally mounted with the pin 22. The piston rod 23 of the cylinder 21 is directed downward and is pressed against the sheet metal 1 when the piston-cylinder arrangement is actuated.

Das Werkzeug 3 wird wie folgt angewendet: Es wird so auf dem Blech 1 plaziert, daß es einen Blechrand umgreift. Der Zylinder 21 wird betätigt, wobei die Kolbenstange 23 gegen das Blech drückt. Hierbei wird das Werkzeug aus der in Figur 2 gezeigten Stellung in die in Figur 3 gezeigte gekippt, wobei der Rand des Bleches 1 mit einem gewünschten Radius um einen gewünschten Winkel gebogen wird. Es können mehrere Biegungen mit verschieden langen Hebelarmen L durchgeführt werden. Das Biegen kann an dem einen Ende des Bleches beginnen und durch schrittweise Verschiebung des Werkzeugs längs der Blechseite nacheinander auf der gesamten Länge des Blechseite vorgenommen werden, so wie es die strichpunktierte Darstellung in Figur 1 zeigt. Die schrittweise durchgeführten Einzeibiegungen können sich dabei teilweise überlappen. Die Seitenverschiebung zwischen zwei Biegungen kann beispielsweise 60 bis 90% der Werkzeugbreite betragen.The tool 3 is used as follows: It is placed on the sheet 1 so that it engages around a sheet edge. The cylinder 21 is actuated, the piston rod 23 pressing against the sheet. Here, the tool is tilted from the position shown in FIG. 2 to that shown in FIG. 3, the edge of the sheet 1 being bent by a desired radius by a desired angle. Several bends can be carried out with lever arms L of different lengths. The bending can begin at one end of the sheet and can be carried out successively along the entire length of the sheet side by gradually moving the tool along the sheet side, as shown by the dash-dotted line in FIG. 1. The step-by-step drawing bends can partially overlap. The side shift between two bends can be, for example, 60 to 90% of the tool width.

Wie aus den Figuren und der vorausgehenden Beschreibung hervorgeht, ist das Werkzeug leicht handhabbar und transportierbar und kann in vielen Fällen, insbesondere bei kleinen und mittelgroßen Serien große kostspielige stationäre Preßausrüstungen ersetzen.As can be seen from the figures and the preceding description, the tool is easy to handle and transport and can replace large, expensive stationary press equipment in many cases, especially in small and medium-sized series.

Die Schenkel 4a, 4b des U-förmigen Bügels sind vorzugsweise so ausgebildet, daß ihre Innenseiten in Richtung zur Öffnung des U-förmigen Schenkels divergieren, wie dies aus den Figuren 2 bis 4 erkennbar ist. Durch diese Verbreiterung des Schenkelabstandes zur Öffnung des U-förmigen Schenkels hin wird das Aufsetzen des Werkzeugs auf dem Blechrand sowie die Verwendung desselben Werkzeugs für unterschiedlich dicke Bleche erleichtert.The legs 4a, 4b of the U-shaped bracket are preferably designed such that their inner sides diverge in the direction of the opening of the U-shaped leg, as can be seen from FIGS. 2 to 4. This widening of the leg distance to the opening of the U-shaped leg makes it easier to place the tool on the edge of the sheet and to use the same tool for sheets of different thicknesses.

Claims (6)

1. Method of bending the marginal sections of sheet metal (1) with a bending tool (3) gripping around the edge of the sheet metal and being provided with one cushion each to bear against the upper and lower side of the sheet metal edge, respectively, a bending force being applied on the sheet metal edge via said cushions by means of an actuating device, characterized in that the sheet metal (1) is placed on a table (2) such that one side of the sheet metal extends beyond the table (2), that the bending tool (3) is formed as a U-shaped yoke with a longer and a shorter leg (4a, 4b) each leg being provided with a cushion, formed as an elongated guide bar (14, 15), in the opening (5) between the two legs (4a, 4b), that the bending tool (3) is applied such that the opening (5) of the yoke (4) grips around the sheet metal edge, and that thereupon an actuating device (21) attached to one (4a) of the legs presses against the sheet metal (1) in such a way that the bending tool (3) performs a tilting movement and the guide bars (14, 15), which are positioned at different distances from the sheet metal edge, are pressed against the sheet metal (1) and exert a bending moment on the edge of the sheet metal.
2. Bending tool (3) for bending the marginal sections of sheet metal (1) with an opening for accommodating the sheet metal edge and with one cushion each to bear against the upper and lower side of the sheet metal edge, respectively, via which cushions a force bending the sheet metal edge can be applied on the sheet metal edge by means of an actuating device, characterized in that the bending tool (3) comprises a U-shaped yoke with a longer and a shorter leg (4a, 4b). that in the opening (5) between the two legs (4a, 4b) each of the cushions is arranged in the form of an elongated guide bar (14, 15) on one of the legs (4a, 4b), that the guide bars (14, 15) are located at different distances from the inner foot point of the opening (5), and that the actuating device (21) is attached to the longer one (4a) of the legs, adapted to be applied on the sheet metal and, on actuating of the bending tool, capable of bending the sheet metal edge.
3. Tool according to claim 2, characterized in that one (15) of the guide bars is displaceably arranged such, that the distance between the lines of abutment of the guide bars (14, 15) on the sheet metal can be varied.
4. Tool according to any of claims 2 or 3, characterized in that it is provided with running wheels (6) with which the tool is placeable on the sheet metal to be bent.
5. Tool according to any of claims 2 to 4, characterized in that it is provided with guiding rolls (12) which, on placing the tool on the sheet metal, bear against the narrow surfaces of the sheet metal edge.
6. Tool according to any of claims 2 to 5, characterized in that the inner sides of the legs (4a, 4b) diverge towards the open side of the U-shaped yoke.
EP83111121A 1982-11-12 1983-11-08 Method of and tool for bending the marginal sections of sheet metal Expired EP0109031B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83111121T ATE26933T1 (en) 1982-11-12 1983-11-08 METHOD AND TOOL FOR BENDING EDGE SECTIONS OF A SHEET METAL.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8206438 1982-11-12
SE8206438A SE443733B (en) 1982-11-12 1982-11-12 SET AND TOOLS FOR BENDING THE THICKNESS PLATE

Publications (3)

Publication Number Publication Date
EP0109031A2 EP0109031A2 (en) 1984-05-23
EP0109031A3 EP0109031A3 (en) 1984-09-05
EP0109031B1 true EP0109031B1 (en) 1987-05-06

Family

ID=20348563

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83111121A Expired EP0109031B1 (en) 1982-11-12 1983-11-08 Method of and tool for bending the marginal sections of sheet metal

Country Status (6)

Country Link
US (1) US4565084A (en)
EP (1) EP0109031B1 (en)
JP (1) JPS59101236A (en)
AT (1) ATE26933T1 (en)
DE (1) DE3371296D1 (en)
SE (1) SE443733B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE513031C2 (en) * 1999-09-06 2000-06-19 Stroemsholmen Ab Device for a sheet forming tool
DE102004050784B3 (en) * 2004-10-14 2006-05-24 Mannesmannröhren-Werke Ag Method and bending press for bending the edge strips of a planar sheet to be formed into a slotted pipe
DE202008000121U1 (en) 2008-01-03 2008-04-17 Eisenbau Krämer mbH Bending machine
IT1391762B1 (en) * 2008-11-11 2012-01-27 Sms Demag Innse Spa Ora Sms Innse Spa FOLDING-EDGE PRESS
CN116765775B (en) * 2023-06-28 2024-02-20 大连福赛汽车部件有限公司 Automobile exhaust pipe fixing support assembly fixture

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2178926A (en) * 1937-04-24 1939-11-07 American Steel & Wire Co Bending machine
DE2307134A1 (en) * 1973-02-14 1974-08-22 Ferndorf Eisen Metall DEVICE FOR BENDING THE ENDS OF SHEET METALS
DE2455596C3 (en) * 1974-11-23 1978-05-03 Mannesmann Ag, 4000 Duesseldorf Press with convex and concave tools for bending the edges of metal sheets
DE2527225C3 (en) * 1975-06-19 1978-10-26 Walter Eckold Vorrichtungs- Und Geraetebau Sperrluttertal, 3424 St Andreasberg Device for dimensionally accurate bending of the edges of curved tank bottoms
FR2331392A1 (en) * 1975-11-13 1977-06-10 Charenton Sa Chaudronnerie Bending press for heavy section steel plates - has former connected to pivot arm located by pin on bracket
DE3011665A1 (en) * 1980-03-26 1981-10-01 Manfred 4050 Mönchengladbach Lortz Sheet metal edging press - has bending plate with pivot point on side of metal sheet

Also Published As

Publication number Publication date
US4565084A (en) 1986-01-21
DE3371296D1 (en) 1987-06-11
SE8206438D0 (en) 1982-11-12
EP0109031A2 (en) 1984-05-23
SE443733B (en) 1986-03-10
ATE26933T1 (en) 1987-05-15
SE8206438L (en) 1984-05-13
JPS59101236A (en) 1984-06-11
EP0109031A3 (en) 1984-09-05

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