EP0497778B1 - Dispositif pour le pliage d'une tole - Google Patents

Dispositif pour le pliage d'une tole Download PDF

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Publication number
EP0497778B1
EP0497778B1 EP90912902A EP90912902A EP0497778B1 EP 0497778 B1 EP0497778 B1 EP 0497778B1 EP 90912902 A EP90912902 A EP 90912902A EP 90912902 A EP90912902 A EP 90912902A EP 0497778 B1 EP0497778 B1 EP 0497778B1
Authority
EP
European Patent Office
Prior art keywords
bending
cheek
sheet
pivoting axis
bending cheek
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
EP90912902A
Other languages
German (de)
English (en)
Other versions
EP0497778B2 (fr
EP0497778A1 (fr
Inventor
Wolfgang Kutschker
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.)
Reinhardt Maschinenbau GmbH
Original Assignee
Reinhardt Maschinenbau GmbH
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6392262&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0497778(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Reinhardt Maschinenbau GmbH filed Critical Reinhardt Maschinenbau GmbH
Publication of EP0497778A1 publication Critical patent/EP0497778A1/fr
Application granted granted Critical
Publication of EP0497778B1 publication Critical patent/EP0497778B1/fr
Publication of EP0497778B2 publication Critical patent/EP0497778B2/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
    • B21D5/042—With a rotational movement of the bending blade

Definitions

  • the invention relates to a device according to the preamble of patent claim 1.
  • the bending beam (and possibly also the lower beam) must be adjusted appropriately depending on the thickness of the sheet to be bent, which requires a considerable amount of equipment and time.
  • the bending cheek slides along the sheet metal section to be bent during the bending process, which leads to undesirable sliding friction and surface stress on the sheet metal.
  • swivel bending machines are set before bending so that the swiveling axis of a swivel beam pivoted from bottom to top is at a distance above the top or bending surface of the swivel beam which corresponds approximately to 1.5 times the value of the sheet thickness. This distance must therefore be specified in order to avoid undesirable crushing of the sheet during the pivoting of the bending beam.
  • Another disadvantage of the known bending method is that often unsightly, unevenly rounded bending contours arise, which differ in particular from the circular shape.
  • a device is known from US-A-4 557 132.
  • the pivot axis of the bending cheek is displaceable in a relatively short, arc-shaped slot, so that an edge of the bending cheek essentially always engages in the same place on a sheet metal section to be bent. It is not possible to achieve certain, predetermined bending contours with the known machine.
  • the bending beam must also be preset there to the respective sheet thickness.
  • FIG. 1 shows schematically the lower beam 1, the upper beam 2 and the bending beam 3 of a bending machine which is not shown and is known per se.
  • a sheet metal 4 is clamped between the lower beam 1 and the upper beam 2 and protrudes with a sheet metal section 5 that is to be bent, beyond the front edges of the cheeks 1 and 2.
  • the bending beam 3 is pivotally mounted in the machine frame about an axis S, which in FIG. 1 runs perpendicular to the plane of the drawing.
  • the swivel axis S runs within the sheet 4 as shown.
  • the sheet could not be bent with such a position of the swivel axis, because if the swivel movement of the bending cheek 3 were carried out, the sheet would be considerably squeezed. Therefore, the pivot axis S has always been arranged somewhat outside of the sheet 4 and above the upper or bending surface 6 of the bending beam at a distance which corresponded approximately to 1.5 times the thickness of the sheet 4.
  • the bending beam 3 is adjusted according to the invention during its pivoting depending on the bending angle passed in a first adjustment direction perpendicular to the pivot axis S and to its bending surface 6. This adjustment is indicated in Figure 1 by the respective arrows A 1 to A 4 .
  • the bending beam 3 assumes the position corresponding to the arrow A 1 .
  • the bending beam 3 is pivoted into the position corresponding to the arrow A 2 and at the same time moved back relative to the pivot axis S and perpendicularly thereto by an amount which corresponds to the difference in length of the arrows A 1 and A 2 .
  • the adjustment of the bending cheek in the direction perpendicular to the pivot axis S while passing through the bending angle between the arrows A 1 and A 2 is controlled according to the invention in such a way that the bending cheek is guided along a predetermined bending contour.
  • the sheet 4 can be given a predetermined, in particular precisely circular shape in the region of this contour, with pinching of the Sheets 4, as I said, can be excluded.
  • the pivot axis S lies only by way of example within the sheet 4. It could also be located elsewhere, in particular also outside the sheet 4.
  • the bending process continues until the bending beam 3 has reached the position corresponding to arrow A 3 , in which the sheet metal section 5 is now bent by approximately 90 °. From the difference in length of the arrows A 2 and A 3 one can again see the adjustment path of the bending beam 3 relative to its pivot axis S. Again, the bending beam 3 has rolled off with a reduced sliding path on the underside of the sheet 4.
  • the bending beam 3 reaches the position corresponding to the arrow A 4 while continuing its pivoting movement.
  • the difference in length between the arrows A 3 and A 4 in turn indicates the adjustment path of the bending beam perpendicular to its pivot axis S in the course of this last phase of the pivot bending process.
  • the adjustment of the bending beam 3 in the direction of arrows A is such that there is a predetermined bending contour, no pinching of the sheet 4 takes place and the sliding friction between the bending beam 3 and sheet 4 is considerably reduced.
  • the sliding path between the bending cheek 3 and the sheet 4 is considerably reduced in comparison with conventional methods and the sheet is thereby protected.
  • the sliding path cannot generally be reduced to zero simply by adjusting the bending beam 3 in the direction of the arrows A, that is to say by pulling the bending beam 3 back from its pivot axis S.
  • a further adjustment which is indicated by the arrows B in FIG. 1, must be added to the adjustment movement of the bending cheek 3 in the direction of the arrows A.
  • This second adjustment takes place in a direction which is always substantially perpendicular to the plane which is defined by the first adjustment direction A and the pivot axis S and is indicated by the arrows B.
  • FIG. 2 shows a schematic front view of the right side of a folding machine 10 with a machine frame 11 and the respective right end faces of the upper beam 2 and the bending beam 3 (the lower beam 1 is covered by the bending beam 3).
  • the left end face of the folding machine which is not shown in FIG. 2, is represented in a corresponding, mirror-image form.
  • a hydraulic cylinder 12 is used for vertical displacement of the upper beam 2 when the sheet 4 is tensioned and released, cf. the arrows G.
  • the bending beam 3 can be pivoted about the pivot axis S with the aid of a motor 13, cf. the arrows H.
  • a first rocker 14 rotatably mounted on the machine frame 11 can be pivoted about the pivot axis S by the motor 13.
  • a second rocker 16 is pivotally mounted about an axis 15. As shown, the axis of rotation 15 of the second rocker 16 lies below the pivot axis S of the first rocker 14.
  • a piston-cylinder unit 18 is provided between the protruding foot 17 of the second rocker 16 and the bending cheek 3, the cylinder housing 19 of which is firmly connected to the bending cheek 3 and the piston rod 21 of which is firmly connected to the foot 17.
  • the piston-cylinder unit 18 provides a longitudinal guidance of the bending beam 3 on the second rocker 16, so that the bending beam 3 when actuating the unit 18 in the direction of arrows I, which correspond to the arrows A 1 to A 4 in Figure 1 , is adjustable perpendicular to the swivel axis S.
  • the rocker 16 can be rotated about the axis 15 relative to the first rocker 14 with the aid of a drive motor 22 which is only indicated in FIG. This rotation provides the adjustment movement already explained in connection with FIG. 1 in the direction of arrows B 1 to B 4 , which is perpendicular to the plane containing the arrows 1 and the pivot axis S (this plane is the plane of the drawing in FIG. 2).
  • the longitudinal guidance of the bending cheek 3 along the arrows A can of course also be designed in a different way than shown in the figure, in particular another drive motor can also be used.
  • the cylinder housing 19 could be in a longitudinal guide on the second rocker 16 to be slidably guided in the direction of arrows I.
  • the bending beam 3 can be adjusted in the direction of arrows A and B during the bending process, so that the advantages already mentioned above are achieved.
  • the drive motors required for the adjustment for example the piston-cylinder unit 18 and the motor 22, are preferably controlled on the basis of a predetermined program in accordance with the desired bending contour. Manual control is also possible with simple folding machines.
  • the straight guidance can take the form of the piston-cylinder unit 18 can also be provided directly between the first rocker 14 and the bending beam 3.
  • the second rocker 16 is then omitted.

Landscapes

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

Claims (4)

1. Dispositif pour le pliage d'une tôle (4), comportant un bâti de machine, une barre inférieure (1), une barre supérieure (2) et une barre de pliage (3), la tôle (4) étant serrée entre les barres inférieure et supérieure (1, 2), et une partie de tôle dépassant de ces barres (1, 2) étant pliée selon un angle de pliage prédéterminé au moyen de la barre de pliage (3), laquelle agit sur cette partie de tôle et peut être pivotée autour d'un axe de pivotement (S), la barre de pliage (3) pouvant simultanément, pendant son pivotement, être déplacée dans une première direction de translation (A), perpendiculaire à son axe de pivotement (S), caractérisé en ce que l'axe de pivotement (S) est fixe, et en ce que la barre de pliage (3) est réalisée de telle sorte que sa distance à l'axe de pivotement (S) augmente pendant le processus de pliage, de sorte que la barre de pliage (3) peut être guidée continûment le long d'un contour de pliage prédéterminé.
2. Dispositif selon la revendication 1, caractérisé en ce que la barre de pliage (3) peut en outre, pendant son pivotement, être déplacée dans une seconde direction de translation (B), qui s'étend sensiblement perpendiculairement au plan contenant la première direction de translation (A) et l'axe de pivotement (S).
3. Dispositif selon la revendication 1, caractérisé en ce que la barre de pliage (3) est guidée de manière sensiblement rectiligne, sur ces deux côtés frontaux, dans un guide respectif (18) s'étendant perpendiculairement à l'axe de pivotement (S), et ce guide (18) est agencé sur une première bielle oscillante (14), montée sur le bâti de machine (11) avec possibilité de pivotement autour de l'axe de pivotement (S).
4. Dispositif selon la revendication 3, caractérisé en ce que le guide (18) de la barre de pliage (3) est agencé sur une seconde bielle oscillante (16), qui est elle-même montée avec possibilité de déplacement sur la première bielle oscillante (14).
EP90912902A 1989-10-26 1990-08-30 Dispositif pour le pliage d'une tole Expired - Lifetime EP0497778B2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE3935659A DE3935659C3 (de) 1989-10-26 1989-10-26 Vorrichtung zum Biegen eines Bleches
DE3935659 1989-10-26
PCT/EP1990/001445 WO1991006382A1 (fr) 1989-10-26 1990-08-30 Dispositif pour le pliage d'une tole

Publications (3)

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

Family

ID=6392262

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90912902A Expired - Lifetime EP0497778B2 (fr) 1989-10-26 1990-08-30 Dispositif pour le pliage d'une tole

Country Status (9)

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

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2198985A1 (fr) * 2008-12-22 2010-06-23 Ralf Beger Procédé et dispositif de pliage d'une pièce en tôle
WO2014206817A1 (fr) 2013-06-27 2014-12-31 Ras Reinhardt Maschinenbau Gmbh Dispositif de manipulation et installation de pliage ainsi que procédé de pliage d'une pièce à plier

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2932144B2 (ja) * 1993-12-28 1999-08-09 トヨタ自動車株式会社 パイプ曲げ加工法および装置
DE19529126A1 (de) * 1995-08-08 1997-02-13 Reinhardt Gmbh Maschbau Vorrichtung zum Biegen eines Bleches
DE19901794A1 (de) * 1999-01-19 2000-07-27 Reinhardt Gmbh Maschbau Biegemaschine
US6439020B1 (en) 2001-03-30 2002-08-27 Baschnagel, Iii Robert J. Gutter forming machine
US6571594B2 (en) 2001-11-02 2003-06-03 Tapco International, Inc. Open back brake
DE10245777A1 (de) * 2002-09-26 2004-04-08 Reinhardt Maschinenbau Gmbh Biegemaschine
US20050183488A1 (en) * 2004-02-19 2005-08-25 Cheng-Chung Chen Plate and tube bending device
DE102006003500B3 (de) * 2006-01-24 2007-08-16 Ralf Beger Blechabkantvorrichtung
NZ564570A (en) * 2007-12-18 2010-02-26 Scott Technology Ltd Metal folding apparatus
WO2009137389A1 (fr) * 2008-05-05 2009-11-12 Eveready Battery Company, Inc. Lame de rasoir et procédé de fabrication
CN102527783B (zh) * 2011-12-30 2014-07-30 东莞新能德科技有限公司 折弯电池极片夹具
CA2814923C (fr) 2013-02-11 2016-10-11 Alexandre Cloutier Trousses de jauge pour redresseurs de courbure de feuille
CN105436253B (zh) * 2015-12-29 2017-05-03 湖州电力设备成套有限公司 一种母线加工折弯机
DE102018000971B3 (de) 2018-02-02 2019-03-07 Gustav-Adolf Hochstrate Schwenkbiegemaschine mit Verstellung der Schwenkachse der Biegewange
DE102018104776B4 (de) * 2018-03-02 2023-09-21 Universität Siegen Vorrichtung zum Schwenkbiegen eines Bleches
CN110405011B (zh) * 2019-08-21 2020-11-17 广州市钊顺金属制品有限公司 一种镀锌钢板制造加工方法
DE102019123308A1 (de) * 2019-08-30 2021-03-04 Universität Siegen Vorrichtung und Verfahren zum Schwenkbiegen eines Werkstückes
CN114160622A (zh) * 2021-11-10 2022-03-11 河北际华鸿德炊事装备有限责任公司 一种用于燃烧器零配件制造的整合式数控折弯机

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2782832A (en) * 1955-04-26 1957-02-26 Pedrick Tool And Machine Co Bending machines
FR2160702B3 (fr) * 1971-11-22 1974-08-19 Wendel Sidelor
DE2630896C3 (de) * 1976-07-09 1979-10-04 Balcke-Duerr Ag, 4030 Ratingen Vorrichtung zum Abbiegen großflächiger Bauteile
US4493200A (en) * 1983-03-10 1985-01-15 Tapco Products Company, Inc. Portable sheet bending brake
US4557132A (en) * 1984-02-03 1985-12-10 Tapco Products Company, Inc. Sheet bending brake
FR2597398B1 (fr) * 1986-04-16 1990-12-07 Favrin Pierre Presse plieuse a tablier pivotant

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2198985A1 (fr) * 2008-12-22 2010-06-23 Ralf Beger Procédé et dispositif de pliage d'une pièce en tôle
WO2014206817A1 (fr) 2013-06-27 2014-12-31 Ras Reinhardt Maschinenbau Gmbh Dispositif de manipulation et installation de pliage ainsi que procédé de pliage d'une pièce à plier

Also Published As

Publication number Publication date
CA2067118A1 (fr) 1991-04-27
ES2042306T5 (es) 1996-05-01
ATE91927T1 (de) 1993-08-15
DE3935659C3 (de) 1997-01-02
CA2067118C (fr) 2000-04-25
WO1991006382A1 (fr) 1991-05-16
DK0497778T4 (da) 1996-04-15
JP2930714B2 (ja) 1999-08-03
DE3935659C2 (fr) 1993-02-18
EP0497778B2 (fr) 1996-02-21
ES2042306T3 (es) 1993-12-01
EP0497778A1 (fr) 1992-08-12
DE3935659A1 (de) 1991-05-02
US5239853A (en) 1993-08-31
JPH05500775A (ja) 1993-02-18

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