EP0140394B1 - Einrichtung zum Biegen von Blechen - Google Patents

Einrichtung zum Biegen von Blechen Download PDF

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Publication number
EP0140394B1
EP0140394B1 EP19840200814 EP84200814A EP0140394B1 EP 0140394 B1 EP0140394 B1 EP 0140394B1 EP 19840200814 EP19840200814 EP 19840200814 EP 84200814 A EP84200814 A EP 84200814A EP 0140394 B1 EP0140394 B1 EP 0140394B1
Authority
EP
European Patent Office
Prior art keywords
die
stamp
frame
sheet material
pivoting axis
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
EP19840200814
Other languages
English (en)
French (fr)
Other versions
EP0140394A3 (en
EP0140394A2 (de
Inventor
Cornelis Hendricus Liet
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to AT84200814T priority Critical patent/ATE38788T1/de
Priority to US06/657,724 priority patent/US4672835A/en
Priority to HU843769A priority patent/HUT40588A/hu
Priority to DK483084A priority patent/DK157479C/da
Priority to AU34072/84A priority patent/AU3407284A/en
Publication of EP0140394A2 publication Critical patent/EP0140394A2/de
Priority to JP12500185A priority patent/JPS613617A/ja
Publication of EP0140394A3 publication Critical patent/EP0140394A3/en
Application granted granted Critical
Publication of EP0140394B1 publication Critical patent/EP0140394B1/de
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
    • B21D5/02—Bending sheet metal along straight lines, e.g. to form simple curves on press brakes without making use of clamping means
    • 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
    • B21D5/002—Positioning devices
    • 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
    • B21D5/0227—Length adjustment of the die

Definitions

  • the invention relates to an apparatus for bending sheet material, comprising a lower beam with a die, an upper beam with a stamp having at least one linear contact zone contacting the sheet material to be bent, the die and the stamp being movable towards each other, wherein the upper and/or lower beam is/are provided with interchangeable stamp and die parts, and a stop means for the sheet material to be bent.
  • the apparatus is characterized in that the stop means is supported by a frame which is pivotably connected with the apparatus frame about a pivoting axis extending in parallel to the linear contact zone of the stamp and in the area situated between the contact zone of the stamp part positioned in the working position and the contact zones of the die part with the die part positioned in the working position, and in that the frame is connected with the apparatus by an actuating means which effects the pivotal motion of the frame in dependency of the relative movement of the stamp and the die such that the stop means remains in contact with the sheet throughout the complete bending operation.
  • Fig. 1 schematically represents a section of an apparatus for bending sheet material and mainly shows a die 25 and a stamp 26.
  • a single line 29 designates the connection between an upper beam 27 and a lower beam 28, which connection, of course, will always be present.
  • the upper beam 27 may be movable downwardly by hydraulic cylinders not shown.
  • the piston position of the cylinders can be determined by potentiometers disposed at either side of the upper beam 27 not shown in the drawings.
  • the upper beam 27 for that purpose is connected by a wire with the wipers of the potentiometers.
  • the electric signals delivered by the wipers of the potentiometers and corresponding with the position of the upper beam 27 can be used by a suitable electronic control unit for controlling the hydraulic cylinders.
  • the die 26 is provided with a die carrying member 30 supported by the lower beam 27 and two movable die parts 31 disposed at either side of the vertical centre plane designated by a broken line 32.
  • the die carrying member 30 includes a longitudinally extending bearing cavity 33 in which the respective die part 31 is pivotably supported with an extension 34 of partly circular section. Furthermore each movable die part 31 by a ball-joint 35 is connected with the ends of a plurality of arms 36 spaced throughout the length of the die 25. The arms have their other ends also connected by a ball-joint 37 with an operating rod 38 (see also fig. 2), which in the represented embodiment is common to both die parts 31.
  • the operating rod is longitudinally slidably mounted in the die carrying member 30 and at one end coupled to an operating means in a manner not illustrated.
  • the die parts 31 may be pivoted back and forth so that the size and the shape of the groove 39 defined between the die parts 31 may be adjusted. Thereby the die parts 31 may be positioned with their ends 40 against each other so that the groove 39 is fully closed. Thereby the die 25 may also be used as a stamp.
  • the stamp 27 is mainly embodied in the same manner as the die 25 and is provided with a stamp carrying member 41 connected with the upper beam 28 and having two longitudinally extending bearing cavities 42 in which movable stamp parts 43 may be pivotably supported with an extension 44 of partly circular section.
  • the pivoting motion of the stamp parts 43 is effected in a similar way by arms 45 and an operating rod 46.
  • a groove may be defined in the stamp 26 so that the stamp 26 may function as a die.
  • the pivoting motion of the movable die parts 31 and the movable stamp parts 43, respectively, can be controlled by a suitable control unit in dependency of the movement of the stamp 26 relative to the die 25 starting from a position in which the stamp 26 respectively the die 25 with the contact zones just contacts the sheet material to be bent in such manner relative to the contact zone of the stamp 26 respectively the die 25 that the distance between the various contact zones remains substantially constant during bending.
  • the die carrying member 30 at the lower side is provided with a channel 47 of inverted U-shaped section, in which the upper end of the lower beam 27 is received.
  • This upper end are arranged bores 48 spaced regularly throughout the length and designated in fig. 1 by a dotted line.
  • slots 50 are formed at each bore 48 as may be seen in the fig. 1 and 3.
  • a shaft 51 is fitted and this shaft 51 at both ends carries excentric stub axles 52 projecting into the slots 50.
  • the stub axles 52 are pivotably journaled in slide blocks 53 mounted in the slots 50.
  • On one of the stub axles 52 in a manner not illustrated a drivable operating arm 54 is secured for rotating the respective shaft 51.
  • the shaft 51 will turn whereby the die 25 locally as a result of the excentric stub axles will somewhat move downwardly or upwardly. Thereby it is possible to camber the die 25 in a relatively simple manner.
  • Fig. 4 represents an embodiment of the apparatus according to the invention which is embodied in such manner that the sheet material to be bent also can be bent in two directions without turning of the sheet material.
  • the apparatus of fig. 4 for that purpose is provided with a die 55 having a rotatably supported carrier 56 and a stamp 57 having a rotatably supported carrier 58.
  • the pivoting motion of the carrier 56, 58 is effected by an associated operating means 59, 60 which by an arm 61 is connected with the respective carrier.
  • Each carrier 56, 58 includes a die part 62 and a stamp part 63 which may be positioned into a working position by the rotation of the respective carrier.
  • the radial distances of the pivoting axis of the carrier 56, 58 to the contact zone of the stamp part 63 respectively the support surface of the die part 62 preferably are equal so that the height of the not illustrated support surface supporting the sheet material does not have to be adjustable.
  • the angular distance between the die part 62 and the stamp part 63 is larger than 90° as appears from fig. 4.
  • Fig. 5 represents a section, partly in side view, of the die 25, in which an adjustable stop means is provided which as a whole is designated with 74.
  • the stop means 74 includes two jaws 75 in which an end edge of the sheet material to be bent can be clamped.
  • the one jaw part 76 of both jaws 75 in a manner not illustrated may be operated by a rod 77.
  • the jaws 75 are disposed each on the one end of an arm 78, which arms 78 are mounted on slide blocks 79 which are slidably ranged on a support beam 80.
  • the support beam 80 is part of a frame 81 which is pivotably connected with this die part 31 about a pivoting axis substantially coinciding with the contact zone 82 between the one die part 31 and the sheet material to be bent.
  • the support beam 80 extends in parallel to the pivoting axis designated with 83 in fig. 7 so that the arms 78 are slidable in parallel to this pivoting axis across the support beam 80 for accommodating the width of the sheet material to be bent.
  • the frame 81 is provided with two arms 84, of which the first ends are pivotably connected with the said die part 31.
  • a box beam 85 is secured, which extends beyond the one arm 84 and supports a drive motor 87 on this extending end 86.
  • two boxes 88 are mounted and in each of them a screw spindle 89 is rotatably journaled.
  • Each box 88 carries a guide rod 90 in parallel to the screw spindle 89.
  • the support beam 80 at both its ends is provided with an extension 91 in which a threaded bore 92 is formed cooperating with the respective screw spindle 89, and with a guide element 93 cooperating with the respective guide rod 90.
  • the screw spindles 89 with their one end project into the box beam 85 and at this end are provided with toothed-belt pulleys 94, through which the screw spindles 89 are coupled to the drive motor 87 by toothed belts 95.
  • the support beam 80 by the actuation of the motor 87 can be moved transversely of the pivoting axis 83 so that the distance between the jaws 75 and the die 25 is adjustable in accordance with the desired location of the shape to be bent into the sheet material.
  • the frame 81 by an actuating mechanism 97 is connected with the lower end of the lower beam 27 or a base (not illustrated) of the apparatus, which carries this lower beam 27.
  • this actuating mechanism 97 consists of two not visible screw spindles which are rotatably journaled in boxes 97 which are coupled to the boxes 88.
  • the screw spindles are drivable by a motor 98 through not visible toothed belts running in a protective box 99. In this manner the pivoting motion of the frame 81 may be effected.
  • the pivoting motion in this case is dependent of the relative movement of the stamp 26 and the die 25.
  • the movement of the stamp 26, for example, can be determined in the manner described in connection with fig. 1 with a potentiometer which is coupled to a control unit.
  • the control unit controls the motor 98 in such manner that the pivoting movement of the frame 81 exactly follows the movement of the sheet material during bending.
  • the control unit subsequently may control the motor 87 in order to move the sheet material for bending the sheet material in a next desired location. Since the jaws 75 may continuously retain the end edge of the sheet material, a profile may be fabricated from the sheet material with very high accuracy.
  • the described apparatus thereby is very suitable for completely automatically bending desired profiles under control of a suitable computer.
  • the frame 81 furthermore includes a rotary platform 100 which is disposed nearly in the centre and which is movable upwardly and downwardly and which is capable of rotating the sheet material in a horizontal plane.
  • the sheet material with the jaws 75 is positioned over the rotary platform 100, whereafter the sheet material is retained thereon. This may take place for example by applying a vacuum to openings formed in the rotary platform of by a rotatably mounted clamping means pressing the sheet material on the rotatary platform 100. After the rotation of the sheet material the end edge of the sheet material turned towards the jaws 75 may be grasped whereafter the subsequent bending operations may be carried out.
  • the embodiment of the apparatus represented in fig. 4 may also be provided with a stop means 74 supported by the pivotable frame 81 as illustrated in the fig. 5-7.
  • a support is mounted and the arms 84 are pivotably connected therewith.
  • the pivoting axis of the frame 81 thereby may be adjusted in the area situated substantially between the contact zone of the stamp part 63 positioned in the working position and the contact zones of the die part 62 with the die part positioned in the working position.
  • the jaws 75 will have to follow this sliding motion.
  • the jaws 75 may be mounted so as to be slidable against the effect of a spring.
  • the motor 87 may be controlled by the control unit for moving the jaws 75 in dependency of the relative movement of the stamp 57 and the die 55. This movement in a manner as described hereinabove may be determined by a potentiometer.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)

Claims (12)

1. Einrichtung zum Biegen von Blechen, mit einem unteren Träger mit einem Gesenk (55), einem oberen Träger mit einem Stempel (57), der wenigstens eine lineare Berührungszone aufweist, welche das zu biegende Blech berührt, wobei das Gesenk (55) und der Stempel (57) gegeneinander bewegbar sind und der obere und/oder untere Träger mit austauschbaren Stempelund Gesenkteilen (62, 63) ausgerüstet ist bzw. sind, und mit Anschlagmitteln (74) für das zu biegende Blech, dadurch gekennzeichnet, dass die Anschlagmittel (74) an einem Gestell (81) befestigt sind, das schwenkbar am Maschinengestell an einer Schwenkachse (83) befestigt ist, welche Schwenkachse (83) sich parallel zur Berührungszone (82) des Stempels (57) und in den Bereich zwischen der Berührungszone des in Arbeitsstellung befindenden Stempelteils (63) und dem Bereich des in der Arbeitsstellung befindenden Gesenkteil (62) erstreckt, und dass das Gestell (81) an der Einrichtung mit Betätigungsmitteln (97) verbunden ist, welche die Schwenkbewegung des Gestells in Abhängigkeit der relativen Bewegung des Stempels (57) und des Gesenks (55) bewirkt, derart, dass die Anschlagmittel während der gesammten Biegeoperation mit dem Blech in Berührung sind.
2. Einrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Anschlagmittel (74) entgegen der Wirkung einer Feder quer zur Schwenkachse (83) des Gestells (81) verschiebbar sind.
3. Einrichtung nach Anspruch 2, dadurch gekennzeichnet, dass die Anschlagmittel (74) quer zur Schwenkachse (83) des Gestells (81) in Abhängigkeit der relativen Bewegung zwischen Stempel (57) und Gesenk (55) verschiebbar sind.
4. Einrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass zwei Greifbakken (75) vorgesehen sind in denen die entsprechende Endkante des zu biegenden Bleches geklemmt werden kann.
5. Einrichtung nach Anspruch 4, dadurch gekennzeichnet, dass das Gestell einen Tragbalken (80), der parallel zur Schwenkachse (83) ist sowie zwei Arme (78), die auf dem Tragbalken (80) parallel verschiebbar zur Schwenkachse (83) befestigt sind, aufweist, wobei jeder Arm (78) an seinen Enden einen Greifbacken (75) besitzt und der Tragbalken (80) quer zur genannten Schwenkachse (83) ist.
6. Einrichtung nach Anspruch 5, dadurch gekennzeichnet, dass das Gestell (81) zwei Führungsstäbe (90) aufweist, die sich parallel zur Schwenkachse (83) erstrecken und die entsprechenden Enden des Tragbalkens (80) führen.
7. Einrichtung nach Anspruch 6, dadurch gekennzeichnet, dass das Gestell (81) zwei drehbare Schraubenspindeln (89) aufweist, die sich parallel zu den Führungsstäben (90) erstrecken und die jeweils mit einer Gewindebohrung (92) in den entsprechenden Enden des Tragbalkens (80) zusammenarbeiten.
8. Einrichtung nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass das Gestell einen Kastenträger (85) aufweist, der an beiden Enden mit einem Arm (84) um die Schwenkachse (83) schwenkbar verbunden ist, wobei dieser Kastenträger (85) einen Antriebsmotor (87) aufweist um die Anschlagmittel (74) quer zur Schwenkachse (83) zu bewegen.
9. Einrichtung nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass ein Drehteller (100) vorgesehen ist, der nach oben und nach unten bewegbar ist und der das zu biegende Blech festhalten kann.
10. Einrichtung nach einem der Ansprüche 1 bis 9, wobei das Gesenk (55) und der Stempel (57) jeweils einen schwenkbar gehaltenen Träger (56; 58) aufweisen, welche Träger jeweils einen Gesenkteil (62) und einen Stempelteil (63) tragen, die durch verschwenken des Trägers (56; 58) in eine Arbeitsposition bringbar sind, dadurch gekennzeichnet, dass der Winkelabstand zwischen dem Stempelteil (63) und dem Gesenkteil (62) grösser ist als 90°.
11. Einrichtung nach Anspruch 10, dadurch gekennzeichnet, dass die Schwenkachse (83) des Gestells (81) einstellbar ist im wesentlichen zwischen Berührungszone des Stempelteils (63) des einen Trägers (56) wenn der Stempelteil in der Arbeitsposition ist und wenigstens einer der Berührungszonen des Gesenkteils (62) dieses Trägers (56) wenn der Gesenkteil in der Arbeitsposition ist.
12. Einrichtung nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, dass das Gesenk (55) und/oder der Stempel (57) einen Halteteil (30, 41 ) aufweisen, die auf der unteren Seite bzw. der oberen Seite einen Kanal (47) mit U-förmigem Querschnitt aufweisen, wobei das obere Ende des unteren Trägers (27) bzw. das untere Ende des oberen Trägers (28) in den Kanal eingesetzt sind und in Längsrichtung im Abstand angeordnete Bohrungen (48) aufweist, wobei die gegenüberliegenden Seitenwände des Kanals (47) bei jeder Bohrung (48) Schlitze (50) aufweist, wobei in jeder Bohrung (48) eine Achse (51) eingesetzt ist, welche Achse (51) an beiden Enden exzentrische Achszapfen (52) aufweist, die in die Schlitze (50) hineinragen und schwenkbar in Gleitblöcken (53) gelagert sind, welche Gleitblöcke (53) in die Schlitze (50) eingesetzt sind, und dass ein bewegbarer Betätigungsarm (54) zum Verschwenken des entsprechenden Schaftes an einem der Achszapfen (52) befestigt ist.
EP19840200814 1983-10-10 1984-06-08 Einrichtung zum Biegen von Blechen Expired EP0140394B1 (de)

Priority Applications (6)

Application Number Priority Date Filing Date Title
AT84200814T ATE38788T1 (de) 1983-10-10 1984-06-08 Einrichtung zum biegen von blechen.
US06/657,724 US4672835A (en) 1983-10-10 1984-10-04 Apparatus for bending sheet material
HU843769A HUT40588A (en) 1983-10-10 1984-10-05 Plate bending apparatus
DK483084A DK157479C (da) 1983-10-10 1984-10-09 Apparat til boejning af plademateriale
AU34072/84A AU3407284A (en) 1983-10-10 1984-10-10 Punch and die for press-brake
JP12500185A JPS613617A (ja) 1984-06-08 1985-06-07 シート状物体を折り曲げる装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL8303472 1983-10-10
NL8303472A NL8303472A (nl) 1983-10-10 1983-10-10 Inrichting voor het buigen van plaatmateriaal.

Publications (3)

Publication Number Publication Date
EP0140394A2 EP0140394A2 (de) 1985-05-08
EP0140394A3 EP0140394A3 (en) 1985-06-12
EP0140394B1 true EP0140394B1 (de) 1988-11-23

Family

ID=19842532

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19840200814 Expired EP0140394B1 (de) 1983-10-10 1984-06-08 Einrichtung zum Biegen von Blechen

Country Status (3)

Country Link
EP (1) EP0140394B1 (de)
DE (1) DE3475280D1 (de)
NL (1) NL8303472A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT397053B (de) * 1988-05-16 1994-01-25 Amada Co Ltd Blechbiegemaschine

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1987004374A1 (en) * 1984-07-18 1987-07-30 Erik Rantala An edging machine
EP0213667A3 (de) * 1985-08-08 1988-09-14 Cornelis Hendricus Liet Verfahren und Vorrichtung zum Biegen von plattenförmigen Werkstücken
DE3533235C2 (de) * 1985-09-18 1997-03-20 Trumpf Gmbh & Co Biegepresse
SE503594C2 (sv) * 1992-10-26 1996-07-15 Nya Ursvikens Mekaniska Verkst Anordning vid underverktyg
CN108856381B (zh) * 2018-08-09 2024-02-02 株洲中车特种装备科技有限公司 一种滑轮组传动式折弯机
CN112439810B (zh) * 2019-09-05 2023-04-07 河南森源电气股份有限公司 母排折弯工装
IT202000004738A1 (it) * 2020-03-05 2021-09-05 Triveneta Impianti S R L Matrice per macchine presse piegatrici e relativa macchina pressa piegatrice
CN113426898A (zh) * 2021-06-04 2021-09-24 刘欢 一种热冲压模具

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE354146C (de) * 1922-06-02 Eulenberg Biege- und Richtmaschine
US2433841A (en) * 1945-04-20 1948-01-06 William T Glud Pivoted forming die for reciprocating metal plate benders
US2703129A (en) * 1951-03-23 1955-03-01 Smith Corp A O Edge turning tool
US2882952A (en) * 1958-02-06 1959-04-21 Carl Parten Die for use in bending flat metal stock and the like
FR1294242A (fr) * 1961-04-12 1962-05-26 Comp Generale Electricite Machine à plisser les tôles de calandres
US3282076A (en) * 1963-12-20 1966-11-01 Laval Turbine Brakes for forming plate or sheet workpieces
FR1390329A (fr) * 1964-01-13 1965-02-26 Technigaz Soc Machine automatique à plier pour la réalisation de deux familles sécantes d'ondulations parallèles
AT271141B (de) * 1964-11-02 1969-05-27 Voest Ag Abkantvorrichtung
FR1522730A (fr) * 1967-05-11 1968-04-26 Voest Ag Manipulateur pour presses destinées au travail des tôles
FR1601215A (de) * 1968-12-31 1970-08-10
FR2057236A5 (en) * 1969-08-07 1971-05-21 Le Transformateur Continuously folded strip metal used for - transformer housing walls
DE2418668A1 (de) * 1974-04-18 1975-10-30 Egon Evertz Biegemaschine zum biegen von blechen und baendern
AT353568B (de) * 1978-02-06 1979-11-26 Voest Ag Abbiegewerkzeug zum herstellen u-foermiger werk- stuecke
DE2911901A1 (de) * 1979-03-27 1980-10-02 Siempelkamp Gmbh & Co Vorrichtung fuer das biegen von blechzuschnitten
CY1200A (en) * 1979-05-16 1983-12-31 Keeton Sons Folding machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT397053B (de) * 1988-05-16 1994-01-25 Amada Co Ltd Blechbiegemaschine

Also Published As

Publication number Publication date
NL8303472A (nl) 1985-05-01
EP0140394A3 (en) 1985-06-12
EP0140394A2 (de) 1985-05-08
DE3475280D1 (en) 1988-12-29

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