EP0353680B1 - Dispositif pour obtenir des rebords de tôle par pliage - Google Patents

Dispositif pour obtenir des rebords de tôle par pliage Download PDF

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Publication number
EP0353680B1
EP0353680B1 EP89114074A EP89114074A EP0353680B1 EP 0353680 B1 EP0353680 B1 EP 0353680B1 EP 89114074 A EP89114074 A EP 89114074A EP 89114074 A EP89114074 A EP 89114074A EP 0353680 B1 EP0353680 B1 EP 0353680B1
Authority
EP
European Patent Office
Prior art keywords
bending
drive device
tool
bending tool
legs
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 - Lifetime
Application number
EP89114074A
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German (de)
English (en)
Other versions
EP0353680A3 (en
EP0353680A2 (fr
Inventor
Rolf Nagel
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
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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 AT89114074T priority Critical patent/ATE77270T1/de
Publication of EP0353680A2 publication Critical patent/EP0353680A2/fr
Publication of EP0353680A3 publication Critical patent/EP0353680A3/de
Application granted granted Critical
Publication of EP0353680B1 publication Critical patent/EP0353680B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B21D5/04—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
    • B21D5/045—With a wiping movement of the bending blade

Definitions

  • the invention relates to a device for producing bevels on workpieces made of sheet metal, the workpiece being clampable between two holding punches that can be moved relative to one another, namely a lower and an upper holding punch, and in addition to an upper bending tool intended for downward bends, a for bending Lower bending tool determined above is provided, wherein a cross-sectionally swinging rocker opening with two legs towards the workpiece and pivotable about a rocker axis carries one of the two bending tools at the free ends of its two legs, and an essentially horizontally acting drive device on the rocker axis , on which one of the two legs of the rocker is articulated but a substantially vertically acting drive device.
  • edge profiles can be formed in sheets in a multi-step process, without having to turn the workpiece when changing the bending direction within the edge sequence.
  • Manufacturing examples are refrigerator doors, luminaire housings, cladding elements for building walls and ceilings, control cabinet parts, steel furniture parts and shelf elements.
  • the working surface of the bending tool used describes a path leading around the associated holding stamp, which protects the workpiece surface.
  • pressing devices in which the sheet is pressed into a die by a punch and the protruding side parts of the workpiece flip up accidentally.
  • a device of the type mentioned at the outset is already known from document EP 0 022 122 B1.
  • the two drive devices of this known device for producing sheet metal bending by bending are designed as crank drives.
  • a cylinder is inserted into the crank mechanism for essentially vertical tool movements, which cylinder is actuated to switch on the other bending tool when changing the beer direction.
  • Another cylinder is used to move a pivot point on a drive rocker for the joint drive of the two crank drives.
  • the structural design of the drive devices and the programming of the path curve of the bending tool used are accordingly complicated. It also appears to be disadvantageous that the rocker arm, which opens in cross-section towards the workpiece, has no space in its mouth for bending overhanging edge strips of workpieces. On the other hand, a lot of working time is always lost when the bending direction is changed within an edge sequence and the other bending tool must be used for this purpose.
  • Document EP-A-77314 describes a bending tool consisting of a frame with two holding punches, each of which is attached to a support, at least one of which can be adjusted with its support transversely to the clamping plane, and from at least one bending tool which is movable approximately parallel and on the other hand transversely to the clamping plane , which has a drive for each of the two directions of movement and interacts with a holding punch as a counter tool, known device for folding a sheet of metal.
  • each bending tool has its own rocker arm, each with a drive device for essentially horizontal tool movements and one drive device for essentially vertical tool movements.
  • a device for folding sheet metal in which two separately pivotable jaws, each carrying one of the two bending tools, are provided.
  • the bending tools can be driven there with the help of one quadrilateral joint
  • the two crank arms mounted in a frame and one bending tool connecting the crank arms comprises load-bearing coupling and has an actuator for moving the articulation point of a crank arm on the frame or for changing the length of a crank arm.
  • This is based on the task of moving the bending tool according to the desired workpiece shape in an advantageous manner relative to the counter-tool, in order to be able to find sufficiency with low bending forces on the one hand and to ensure extensive freedom with regard to the shaping of the workpiece on the other hand.
  • the advantages of the solution are offset in particular by the complexity of the four-bar linkages and the large number of drive devices designed as hydraulic cylinders.
  • the invention has for its object to provide a bending device of the type mentioned, which on the one hand allows a quick changeover to the other bending tool with little effort and on the other hand offers ample space for bending overhanging workpiece parts.
  • rocker is divided in a hinge-like manner into two jaws which can be pivoted separately about the rocker axis, each forming one of its two legs, and a substantially vertically acting drive device is also articulated on the other of the two legs or the corresponding jaw is.
  • the jaw width of the swing arm can thus be adapted to the space required by the workpiece part protruding from the two holding dies when bending. With only small sheet metal bends, the jaw width of the rocker is reduced so that the other bending tool can be turned on requires little time to change the direction of bending. However, if the sheet to be bent is far from the holding dies designed as counter tools and if it is possibly already formed into a bulky structure by at least one bend, the jaw width of the rocker can be increased accordingly.
  • the two drive devices for essentially vertical tool movements only the one which is articulated to the jaws carrying the bending tool to be used is actuated in the working phase of the bending device.
  • the drive device for essentially horizontal tool movements are common to both jaws.
  • the two drive devices can be designed for substantially vertical tool movements in widely differing maximum paths.
  • Advantages achieved with the invention are, in particular, that wider sheet metal bends and ultimately more complicated edge profiles can be produced and that the bending device can be used more universally in an enlarged area of application.
  • the drawing shows the bending device at the end of the bending process for a particularly wide bend 10 in a sheet metal 13 clamped between the fixed lower holding die 11 and the ventable upper holding die 12, after two substantially narrower bends 14 and 15 in the opposite bending direction on the same workpiece 13 have been manufactured.
  • a total of three drive devices 19, 20 and 21 are provided for the swing arm 18 of the bending device which is hinge-divided in the upper jaws 16 and the lower jaws 17, of which the drive device 19 is connected to the swing arm axis 23 via a hinge block 22, the drive device 20 in one on the top of the upper jaw 16 near the upper bending tool 24 fixed bearing block 25 is articulated and the drive device 21 is articulated in a bearing block 27 fastened on the underside of the lower jaw 17 near the lower bending tool 26.
  • the fact that the three drive devices 19, 20 and 21 consist of hydraulic cylinders pivotably mounted on the device frame 28 gives the bending device high performance, great flexibility in the control of the movement sequences and a simple structural design.
  • rocker shaft 23 which can be carried by the drive device 19 for essentially horizontal tool movements, is mounted in pivotable support brackets 29.
  • support lugs 29, which in turn are pivotably mounted with their lower ends on the device frame 28, the swing arm axis 23 is guided on a circular arc deviating from the horizontal.
  • the two drive devices 20 and 21 are designed for essentially vertical tool movements on very different maximum paths. Since only the upper holding stamp 12 can be lifted from the two holding stamps 11 and 12, the larger maximum path is assigned to the upper bending tool 24.
  • two coaxial hydraulic cylinders are provided as the drive device 20 articulated on the upper jaw 16, one of which hydraulic cylinder the working area of the upper bending tool 24 and the other hydraulic cylinder of the individual space dimensioning for the fold 10 generated by the lower bending tool 26 of the workpiece 13 is assigned.
  • the space requirement of the edge profile consisting of the bevels 10, 14 and 15 is illustrated by the arcuate envelope 30.
  • the ventilation height of the upper holding die 12 corresponds approximately to the maximum path of the upper bending tool 24.
  • a hydraulic cylinder 31 which is firmly supported on the device frame 28 is provided, the piston rod 32 of which at the lower end offers a plunging space 34 through a coaxial countersunk screw 33 with the hydraulic cylinder 31 and in turn the upper beam 35 carrying the holding stamp 12 is connected.
  • the holding punch 12 is designed as an interchangeable counter tool and secured in the upper cheek 35 against falling out by a sliding block 36 extending in both longitudinal directions.
  • the lower holding punch 11 which is also designed as an interchangeable counter-tool, is fixed on the lower cheek 37 which is firmly supported on the device frame 28.
  • the two bending tools 24 and 26 are also interchangeable for changing the length and cross-sectional area. They are screwed to the free end of the two separately pivotable jaws 16 and 17 secured by a fit.
  • the jaw depth of the rocker 18 corresponds approximately to the maximum travel of the upper bending tool 24. Since the mutually facing inner surfaces of the two jaws 16 and 17 in one of the mutual contact of the two bending tools 24 and 26 close position parallel to each other, the times required before bending for turning on the bending tools 24 and 26 can be kept extremely short as long as the step profile to be produced does not reach a greater height. On the other hand, the significance of the bending device described lies precisely in the free space for the production of particularly high edge profiles. However, this freedom is only provided when necessary. The two jaws 16 and 17 then form a considerable opening angle with their mutually facing inner surfaces, the influence of the drive device 20 exceeding the influence of the drive device 21.

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 (4)

1. Dispositif pour former des rebords sur des pièces de tôle, dans lequel la pièce (13) peut être serrée entre deux pistons de retenue (11,12) déplaçables l'un par rapport à l'autre, à savoir un piston inférieur et un piston supérieur de retenue, et dans lequel, en dehors d'un outil supérieur de pliage (24) utilisé pour former des rebords dirigés vers le bas, il est prévu un outil inférieur de pliage (26) utilisé pour former des rebords dirigés vers le haut, et dans lequel un bras oscillant (18), qui s'ouvre, en coupe transversale, à la manière d'une mâchoire à deux branches en direction de la pièce (13) et peut pivoter autour d'un axe d'oscillation (23), porte, sur les extrémités libres de ses deux branches, respectivement l'un des deux outils de pliage (24,26), et dans lequel un dispositif d'entraînement (19), qui agit sensiblement horizontalement, est articulé sur l'axe (23) du levier oscillant, et un dispositif d'entraînement (21), qui agit sensiblement verticalement, est articulé sur l'une des deux branches du levier oscillant (18), caractérisé par le fait que le levier oscillant (18) est subdivisé, à la manière d'une charnière, en deux mâchoires (16,17) qui peuvent pivoter séparément autour de l'axe (23) du levier oscillant et forment chacune l'une des deux branches de ce levier, tandis qu'également un dispositif d'entraînement (20), qui agit sensiblement verticalement, est articulé sur l'autre des deux branches ou sur la mâchoire (17) correspodant à cette branche.
2. Dispositif suivant la revendication 1, caractérisé par le fait que le déplacement relatif entre les deux pistons de retenue (11,12) est exécuté par le piston supérieur de retenue (12) et que la course maximale de ce piston correspond approximativement à la course maximale de l'outil supérieur de pliage (24), dont la course maximale est supérieure à la course maximale de l'outil inférieur de pliage (26).
3. Dispositif suivant la revendication 2, caractérisé par le fait que la longueur des deux mâchoires (16,17) correspond approximativement à la course maximale de l'outil supérieur de pliage (24).
4. Dispositif suivant l'une des revendications 1 à 3, caractérisé par le fait que le dispositif d'entraînement (20), articulé sur la mâchoire supérieure (16), est constitué de deux vérins hydrauliques branchés coaxialement en série, dont l'un sert à provoquer le déplacement de travail de l'outil supérieur de pliage (24) et dont l'autre sert à réaliser le dimensionnement du besoin en place pour les rebords (10), vers le haut.
EP89114074A 1988-08-03 1989-07-29 Dispositif pour obtenir des rebords de tôle par pliage Expired - Lifetime EP0353680B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89114074T ATE77270T1 (de) 1988-08-03 1989-07-29 Vorrichtung zum erzeugen von blechabkantungen durch biegen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3826310 1988-08-03
DE3826310A DE3826310A1 (de) 1988-08-03 1988-08-03 Vorrichtung zum erzeugen von blechabkantungen durch biegen

Publications (3)

Publication Number Publication Date
EP0353680A2 EP0353680A2 (fr) 1990-02-07
EP0353680A3 EP0353680A3 (en) 1990-11-28
EP0353680B1 true EP0353680B1 (fr) 1992-06-17

Family

ID=6360125

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89114074A Expired - Lifetime EP0353680B1 (fr) 1988-08-03 1989-07-29 Dispositif pour obtenir des rebords de tôle par pliage

Country Status (3)

Country Link
EP (1) EP0353680B1 (fr)
AT (1) ATE77270T1 (fr)
DE (1) DE3826310A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108746268A (zh) * 2018-05-29 2018-11-06 郑文豪 一种电力母线槽自动生产机器人

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5259231A (en) * 1989-10-26 1993-11-09 Reinhardt Maschinenbau Gmbh Process for the two-directional bending of sheet metal
IT1242874B (it) * 1990-12-07 1994-05-18 Samat Srl Macchina per la piegatura di lamiere
IT1258577B (it) * 1992-04-22 1996-02-27 Antonio Codatto Dispositivo di movimentazione per lame di pressa piegatrice per lamiere
ES2063658B1 (es) * 1992-09-21 1996-12-01 Goiti S Coop Ltda Maquina perfeccionada plegadora de chapa.
DE4435719C1 (de) * 1994-10-06 1996-02-01 Daimler Benz Ag Vorrichtung zum Abkanten von Blechen
US5640809A (en) * 1995-03-29 1997-06-24 Iannelli; Anthony M. Rain gutter shield
DE19847905A1 (de) * 1998-10-19 2000-04-20 Weinbrenner Paul Maschbau Biegeeinrichtung
DE19901796A1 (de) * 1999-01-19 2000-07-27 Reinhardt Gmbh Maschbau Biegemaschine
ES2190298B1 (es) * 2000-01-31 2004-10-16 Goiti, S.Coop Maquina plegadora de chapas metalicas.
DE102019008118B4 (de) * 2019-11-21 2022-09-15 Wolfram Hochstrate Schwenkbiegemaschine insbesondere zum Gegenbiegen mit einer Duplex-Biegewange

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT363756B (de) * 1979-06-20 1981-08-25 Krems Huette Gmbh Biegemaschine
AT363757B (de) * 1980-04-24 1981-08-25 Voest Alpine Ag Vorrichtung zum abkanten von blechtafeln
AT372883B (de) * 1981-10-09 1983-11-25 Voest Alpine Ag Vorrichtung zum abkanten einer blechtafel
US4722214A (en) * 1985-03-12 1988-02-02 Murata Kikai Kabushiki Kaisha Split die for holding work during bending operation
DE3605815C2 (de) * 1986-02-22 1995-06-22 Weinbrenner Paul Maschbau Vorrichtung zum Biegebearbeiten von Blechtafeln

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108746268A (zh) * 2018-05-29 2018-11-06 郑文豪 一种电力母线槽自动生产机器人

Also Published As

Publication number Publication date
DE3826310A1 (de) 1990-02-08
DE3826310C2 (fr) 1991-11-07
EP0353680A3 (en) 1990-11-28
EP0353680A2 (fr) 1990-02-07
ATE77270T1 (de) 1992-07-15

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