EP0109031B1 - Procédé et outil pour cintrer les sections marginales d'une tôle - Google Patents

Procédé et outil pour cintrer les sections marginales d'une tôle 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
Other languages
German (de)
English (en)
Other versions
EP0109031A2 (fr
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
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by ASEA AB filed Critical ASEA AB
Priority to AT83111121T priority Critical patent/ATE26933T1/de
Publication of EP0109031A2 publication Critical patent/EP0109031A2/fr
Publication of EP0109031A3 publication Critical patent/EP0109031A3/de
Application granted granted Critical
Publication of EP0109031B1 publication Critical patent/EP0109031B1/fr
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.

Claims (6)

1. Procédé pour plier les sections marginales d'une tôle (1) avec un outil de pliage (3) qui entoure le bord de la tôle, et présentant respectivement un coussin destiné à s'appliquer contre le côté supérieur et inférieur du bord de la tôle, coussins par l'intermédiaire desquels est exercée sur la tôle, à l'aide d'un mécanisme d'entraînement, une force de pliage du bord de la tôle, caractérisé par le fait que la tôle (1) est placée de telle façon sur une table (2) qu'un côté de la tôle s'étend au-delà de la table (2), que l'outil de pliage (3) qui est réalisé à la manière d'un étrier en U possédant une branche plus longue et une branche plus courte (4a, 4b), est appliqué par des coussins conformés chacun sous la forme d'une règle allongée (14, 15), dans l'ouverture (15) ménagée entre les branches (4a, 4b), de manière que l'ouverture (5) de l'étrier (4) entoure le bord (1) de la tôle, et qu'ensuite un dispositif d'entraînement (21) présent sur l'une (4a) des branches, exerce une pression telle contre la tôle (1) que l'outil de pliage (3) bascule et que les règles (14, 15) qui se situent à différentes distances du bord de la tôle, sont pressées contre la tôle (1), et exerce un couple de flexion sur le bord de cette dernière.
2. Outil de pliage (3) pour plier les sections marginales d'une tôle (1), avec une ouverture destinée à recevoir le bord de la tôle, du type dans lequel il est prévu respectivement sur le côté supérieur et inférieur de l'ouverture un coussin destiné à s'appliquer contre le côté supérieur et inférieur du bord de la tôle, coussins par l'intermédiaire desquels un dispositif d'entraînement est susceptible d'exercer sur le bord de la tôle une force capable de plier le bord de la tôle. caractérisé par le fait que l'outil de pliage (3) comporte un étrier (4) en forme de U ayant une branche plus longue et une branche plus courte (4a, 4b). que dans l'ouverture (5) située entre les branches (4a, 4b), des coussins qui ont la forme de règles allongées (14, 15) sont montés respectivement sur chaque branche (4a, 4b), que les règles (14, 15) se situent à des distances différentes du point de base intérieur de l'ouverture (5), et que le dispositif d'entraînement (21) est disposé sur la branche la plus longue (4a), est susceptible d'être appliqué contre la tôle et est capable, lors de la manoeuvre de l'outil de pliage, de basculer autour du bord de la tôle.
3. Outil de pliage selon la revendication 2, caractérisé par le fait que la première règle (15) est disposée de manière à pouvoir être déplacée, et cela de façon que l'on puisse modifier la distance entre les lignes d'attaque des règles (14, 15) sur la tôle (1).
4. Outil selon la revendication 2 ou 3, caractérisé par le fait qu'il est pourvu de galets de roulement (6) à l'aide desquels il est susceptible d'être placé sur la tôle à plier.
5. Outil selon l'une des revendications 2 à 4. caractérisé par le fait qu'il est pourvu de galets de guidage (12) qui, lors de la mise en place de l'outil sur la tôle, portent contre les surfaces étroites du bord de la tôle.
6. Outil selon l'une des revendications 2 à 5, caractérisé par le fait que le côté intérieur des branches (4a, 4b) diverge dans la direction vers le côté ouvert de l'étrier en forme de U.
EP83111121A 1982-11-12 1983-11-08 Procédé et outil pour cintrer les sections marginales d'une tôle Expired EP0109031B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83111121T ATE26933T1 (de) 1982-11-12 1983-11-08 Verfahren und werkzeug zum biegen von randabschnitten eines bleches.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8206438 1982-11-12
SE8206438A SE443733B (sv) 1982-11-12 1982-11-12 Sett och verktyg for kantbockning av tjockplat

Publications (3)

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

Family

ID=20348563

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83111121A Expired EP0109031B1 (fr) 1982-11-12 1983-11-08 Procédé et outil pour cintrer les sections marginales d'une tôle

Country Status (6)

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

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE9903143L (sv) * 1999-09-06 2000-06-19 Stroemsholmen Ab Anordning vid ett plåtformningsverktyg
DE102004050784B3 (de) * 2004-10-14 2006-05-24 Mannesmannröhren-Werke Ag Verfahren und Anbiegepresse zum Anbiegen der Randstreifen eines zu einem Schlitzrohr zu formenden ebenen Bleches
DE202008000121U1 (de) 2008-01-03 2008-04-17 Eisenbau Krämer mbH Blechbiegemaschine
IT1391762B1 (it) * 2008-11-11 2012-01-27 Sms Demag Innse Spa Ora Sms Innse Spa Pressa piega-bordi
CN116765775B (zh) * 2023-06-28 2024-02-20 大连福赛汽车部件有限公司 一种汽车排气管道固定支架装配工装

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 (de) * 1973-02-14 1974-08-22 Ferndorf Eisen Metall Vorrichtung zum anbiegen der enden von blechen
DE2455596C3 (de) * 1974-11-23 1978-05-03 Mannesmann Ag, 4000 Duesseldorf Presse mit Konvex- und Konkavwerkzeug zum Anbiegen der Ränder von Blechen
DE2527225C3 (de) * 1975-06-19 1978-10-26 Walter Eckold Vorrichtungs- Und Geraetebau Sperrluttertal, 3424 St Andreasberg Vorrichtung zum maßgenauen Abwinkein der Ränder von gewölbten Tankböden
FR2331392A1 (fr) * 1975-11-13 1977-06-10 Charenton Sa Chaudronnerie Dispositif pour le cambrage des toles a froid
DE3011665A1 (de) * 1980-03-26 1981-10-01 Manfred 4050 Mönchengladbach Lortz Blechkanten-anbiegepresse

Also Published As

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

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