EP0695591B1 - Dispositif pour cintrer des profilés creux à section de profil non-fermé de tous cÔtés - Google Patents

Dispositif pour cintrer des profilés creux à section de profil non-fermé de tous cÔtés Download PDF

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Publication number
EP0695591B1
EP0695591B1 EP95110337A EP95110337A EP0695591B1 EP 0695591 B1 EP0695591 B1 EP 0695591B1 EP 95110337 A EP95110337 A EP 95110337A EP 95110337 A EP95110337 A EP 95110337A EP 0695591 B1 EP0695591 B1 EP 0695591B1
Authority
EP
European Patent Office
Prior art keywords
bending
hollow profile
bending die
profile
introducing
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
EP95110337A
Other languages
German (de)
English (en)
Other versions
EP0695591A1 (fr
Inventor
Erwin Paul Josef Lehrieder
Otto Walter Lutz
Franz Konrad Mezger
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.)
Koenig and Bauer AG
Original Assignee
Koenig and Bauer AG
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 Koenig and Bauer AG filed Critical Koenig and Bauer AG
Publication of EP0695591A1 publication Critical patent/EP0695591A1/fr
Application granted granted Critical
Publication of EP0695591B1 publication Critical patent/EP0695591B1/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
    • B21D9/00—Bending tubes using mandrels or the like
    • B21D9/01—Bending tubes using mandrels or the like the mandrel being flexible and engaging the entire tube length
    • B21D9/03—Bending tubes using mandrels or the like the mandrel being flexible and engaging the entire tube length and built-up from loose elements, e.g. series of balls
    • 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
    • B21D9/00—Bending tubes using mandrels or the like
    • B21D9/05—Bending tubes using mandrels or the like co-operating with forming members
    • B21D9/07—Bending tubes using mandrels or the like co-operating with forming members with one or more swinging forming members engaging tube ends only
    • B21D9/073—Bending tubes using mandrels or the like co-operating with forming members with one or more swinging forming members engaging tube ends only with one swinging forming member

Definitions

  • the invention relates to a device for bending Hollow profiles with not closed on all sides Profile cross sections according to the preamble of the claim 1 (see e.g. WO-A-92 128 12).
  • the invention has for its object a To create device with which not all-round closed hollow profiles, especially with a U-shaped groove that can be bent without the To deform profile cross section, the hollow profile after the Recalibrate the bending process and during the Bending process additional, through the mandrel keep emerging forces to a minimum.
  • the bending is free forces absorbed by transmission pieces and such a deformation of the U-shaped, for example trained profile cross section largely avoided.
  • the profile cross-section is after completed bending process again by pulling Calibration rolls along the U-shaped groove of the curved Hollow profile calibrated.
  • Bending mandrel for bending the hollow profile also at larger profile cross sections are not essential Additional forces must be applied.
  • the removal is made using a two-part bending die of the curved and possibly braced hollow profile much easier. You can also use this curved hollow profiles with a bending angle that is larger than 180 °.
  • the device according to the invention is in the drawing shown and is described in more detail below.
  • a head 1 of a pipe bending machine has a bending die 2, a clamping piece 3 and a sliding piece 4.
  • a hollow profile 6 to be bent is inserted into the bending die 2 with a profile cross section which is not closed on all sides but is open on one side, for example U-shaped.
  • An outer contour of this hollow profile 6 (seen in section, FIG. 2) consists of a base surface 7 with a width b1 and two side surfaces 8, 9 perpendicular thereto, each with a height h1.
  • a further U-shaped groove 17 of a depth t3 and a width b3 can also be formed in the respective inner side surfaces 14, 16.
  • the bending die 2 is mounted in the head 1 of the pipe bending machine about a pivot axis 18 by means of a drive, not shown.
  • the hollow profile 6 is to be arcuate over part of its length with respect to the side surface 8, for. B. arcuate.
  • the bending die 2 is divided in a division plane 19 perpendicular to this pivot axis 18, so that the bending die 2 consists of a lower part 21 and an upper part 22 detachable from the lower part 21.
  • An outer contour of the bending die 2, ie of the upper part 21 and the lower part 22, is delimited, for example, by an angle alpha of approximately 270 ° in the form of a cylinder jacket with a radius R about the pivot axis 18.
  • the remaining segment is delimited by two isosceles, mutually perpendicular side faces 23, 24 of the leg length R, which corresponds to the radius R.
  • the lower part 21 of the bending die 2 has a circumferential, L-shaped shoulder 26, equidistant from the outer contour, consisting of a side surface 27 with a height h4 and a base surface 28 perpendicular thereto, with a width b4.
  • the upper part 22 of the bending die 2 is designed as a plane-parallel plate which, as already described, has the exact outer contour of the lower part 21.
  • the lower part 21 of the bending die 2 is provided with at least two, in the present example three, centering pins 29 which are fixedly connected to the lower part 21 and which engage parallel to the pivot axis 18 in corresponding bores 31 of the upper part 22 of the bending die 2.
  • the upper part 22 of the bending die 2 is movable along the pivot axis 18.
  • locking devices act, in the present example hydraulic cylinders 32, which press the upper part 22 of the bending die 2 against the lower part 21 of the bending die 2.
  • the locking device can also be designed such. B. removable, so that the upper part 22 of the bending die 2 is removable from the lower part 21.
  • the circumferential shoulder 26 of the lower part 22 forms with the upper part 22 a circumferential U-shaped groove 33 with a height h4 and a width b4.
  • the height h4 of the U-shaped groove 33 is slightly (approx. 0.1 to 0.5 mm) greater than the height h1 of the hollow profile 6 and the width b4 of the U-shaped groove 33 is slightly (approx. 0.5 to 1 mm) smaller than the width b1 of the hollow profile 6.
  • the division level 19 of the bending die 2 can of course also perpendicular to the swivel axis 18 in any one standing cutting plane in the area of the side surface 27 the circumferential groove 33 lie.
  • the side surface can also 27 have a concave or convex curvature.
  • This Clamping piece 3 has a cuboid shape, for example and consists z. B. made of hard plastic.
  • a further actuating device for example, a hydraulic cylinder 36 attached the movable end of the slider 4 is attached.
  • This slider 4 can, for. B. a cuboid shape to have.
  • a diameter d1 of the calibration rollers 37 is slightly (approx. 0.1 mm) smaller than the width b2 of the U-shaped groove 12 and a length l1 of the calibration rollers 37 is smaller (approx. 1 mm) than the depth t2 of the U-shaped ones Groove 12 of the hollow profile 6.
  • the calibration rollers 37 are each provided with at least one bore 42 perpendicular to a cylinder axis 41. Through these holes 42 of the calibration rollers 37 leads at least one common flexible, tensile connecting part, for. B.
  • a wire rope 43 A wire rope 43.
  • Two fixing pieces, for example wire rope clips 44, are fastened to this wire rope 43 at a distance l2. Between these wire rope clips 44, the calibration rollers 37 are arranged, which, lined up without a distance, result in a shorter length l3 than the distance l2 of the two wire rope clips 44. The calibration rollers 37 are thereby movable on the wire rope 43.
  • a device 47 for introducing a tensile force ie a pulling device 47, for example a handle or a hydraulic cylinder, is fastened (FIG. 5).
  • the U-shaped grooves 17 of the side surfaces 14, 16 of the hollow profile 6 are filled with strip-shaped, opposite transmission pieces 48 made of pressure-resistant, elastic material, for example spring steel, the dimensions of which, when viewed in section, have approximately the depth t3 and width b3 of the groove 17.
  • These transfer pieces 48 touch the grooves 17 of the side surfaces 14, 16 continuously, in a sheet-like manner and the lateral surfaces 39 of the calibration rollers 37 lying between the transfer pieces 48 in a linear manner.
  • the transmission pieces 48 and thus also the grooves 17 support each other. If no grooves 17 are embedded in the side surfaces 14, 16, transfer pieces 48 with a depth t2 of the side surfaces 14, 16 and a thickness d2 of approximately 2 mm are inserted between the side surfaces 14, 16 and the outer surface 39 of the calibration rollers 37. A continuous, flat power transmission is thus ensured between the transfer pieces 48 and the side surfaces 14, 16. In this case, the diameter d1 of the calibration rollers 37 is reduced by the thicknesses d2 of the two transfer pieces 48.
  • the total length of the transfer pieces 48 can be total length to be bent of the hollow profile 6 and be fixed to the profile or just as well The area of the resulting forces are and are relative move to the hollow section 6.
  • the bending process is as follows: The hollow profile 6 filled with calibration rollers 37 and transfer pieces 48 is inserted into the bending die 2, so that the hollow profile 6 rests on the side surface 27 and base area 28 of the bending die 2. The upper part 22 is then pressed onto the lower part 21 by means of the hydraulic cylinders 32. By actuating the hydraulic cylinder 34 of the clamping piece 3, the hollow profile 6 is clamped between the clamping piece 3 and the bending die 2. At a free end 49 of the hollow profile 6, the slider 4 is applied by means of the hydraulic cylinder 36. The slider 4 thus acts as a counter bearing for the free end 49 of the hollow profile 6.
  • a drive now swivels the bending die 2 and pulls the hollow profile 6 fixed to the bending die 2 via the clamping piece 3.
  • the latter is deformed according to the predetermined shape of the bending die 2, in the present case in the form of a circular arc, since the free end 49 of the hollow profile 6 is supported on the counter bearing, ie on the slide 4.
  • Forces released by the bending process towards the outside, which could cause any deformation of the profile cross section, are absorbed by the circumferential groove 33 of the bending die 2.
  • Forces acting on the side surfaces 14, 16 are absorbed continuously by the transfer pieces 48. These transfer pieces are supported either directly or via auxiliary means, ie calibration rollers 37.
  • the transfer pieces 48 are deformed in the bending direction and the positions of the calibration rollers 37 lined up on the flexible wire rope 43 are adapted to the bent hollow profile 6. If a desired bending angle beta is reached, the drive stops and the clamping piece 3 is turned off by the hollow profile 6. By actuating the pulling device 47, the rollers are pulled out of the hollow profile 6 and thereby smooth out any unevenness of the side surfaces 8, 9 of the hollow profile 6, ie the U-shaped groove 12 of the hollow profile 6 is calibrated true to size. After removing the calibration rollers 37, the transfer pieces 48 are removed and spring back into their original shape.
  • the clamping piece 3 and the sliding piece 4 are turned off from the hollow profile 6 by means of the hydraulic cylinders 34, 36, and the tensioning of the lower part 21 and the upper part 22 of the bending die 2 is released by relaxing the hydraulic cylinder 32.
  • the curved hollow profile 6 is removed from the bending die 2 to the front. If the bending angle Beta of the hollow profile 6 is greater than 180 °, the upper part 22 is removed from the lower part 21 of the bending die 2 and the bent hollow profile 6 is removed upwards from the bending die 2.

Claims (5)

  1. Dispositif pour cintrer des profilés creux (6) à sections de profil non-fermées de tous côtés, constitué d'une matrice de cintrage (2), d'au moins une pièce de serrage (3) et d'au moins une pièce de glissement (4), caractérisé par deux pièces de transmission (48) opposées, constituées d'un matériau élastiques en flexion, résistant à la compression, pour soutenir par une forme de surface, de façon continue, chaque fois des faces latérales (14; 16) intérieures ou des rainures (17) des faces latérales (14; 16) du profilé creux (6), qui, pendant le processus de cintrage, sont disposées de façon fixe par rapport au profilé, où, entre les pièces de transmission (48), sont disposés une pluralité de rouleaux de calibrage (37) dont les surfaces d'enveloppe (39) sont en contact linéaire avec les pièces de transmission (48).
  2. Dispositif selon la revendication 1, caractérisé en ce que les rouleaux de calibrage (37) sont alignés sur un câble (43) flexible, résistant à la traction.
  3. Dispositif selon la revendication 2, caractérisé en ce qu'un dispositif, destiné à induire une force de traction, est disposé à une extrémité (46) du câble (43).
  4. Dispositif selon la revendication 3, caractérisé en ce que le dispositif (47), prévu pour induire une force de traction, est réalisé sous la forme d'une poignée.
  5. Dispositif selon la revendication 3, caractérisé en ce que le dispositif (47), prévu pour induire une force de traction, est constitué d'un cylindre hydraulique.
EP95110337A 1994-07-05 1995-07-03 Dispositif pour cintrer des profilés creux à section de profil non-fermé de tous cÔtés Expired - Lifetime EP0695591B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4423487 1994-07-05
DE4423487A DE4423487C2 (de) 1994-07-05 1994-07-05 Vorrichtung zum Biegen von Hohlprofilen mit nicht allseitig geschlossenen Profilquerschnitten

Publications (2)

Publication Number Publication Date
EP0695591A1 EP0695591A1 (fr) 1996-02-07
EP0695591B1 true EP0695591B1 (fr) 1999-12-22

Family

ID=6522266

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95110337A Expired - Lifetime EP0695591B1 (fr) 1994-07-05 1995-07-03 Dispositif pour cintrer des profilés creux à section de profil non-fermé de tous cÔtés

Country Status (3)

Country Link
EP (1) EP0695591B1 (fr)
AT (1) ATE187907T1 (fr)
DE (2) DE4423487C2 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100491010C (zh) * 2005-08-09 2009-05-27 十堰市风雷工贸有限公司 一种小曲率半径弯管成型方法
CN105081022B (zh) * 2015-09-14 2017-11-03 哈尔滨工业大学 一种开口型截面非对称型材弯曲成形方法
CN111545674B (zh) * 2020-05-19 2021-12-17 宿迁市苏宿工业园区城市发展投资有限公司 一种折弯角度可调的建筑用钢筋折弯装置
CN113083961B (zh) * 2021-04-08 2022-06-03 常州大学 一种薄壁钢管直角弯头的免挤压折弯设备

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2274856A (en) * 1938-06-04 1942-03-03 Douglas & Lomason Co Forming device
DE867941C (de) * 1950-07-19 1953-02-23 Jakob Vetterli Vorrichtung zum Biegen von Rohren, insbesondere Bleirohren
US2740454A (en) * 1952-10-02 1956-04-03 Western Electric Co Apparatus for making diagonal twisted or skew bends in wave guide tubing
DE3000170C2 (de) * 1980-01-04 1984-09-06 W. Eckold AG, Trimmis Dorn für ein zu biegendes Rohr
DE3321504A1 (de) * 1982-07-03 1984-01-05 Thomas Peter Dipl.-Wirtsch.-Ing. 6120 Michelstadt Lang Verfahren und vorrichtung zum biegen von duennwandigen rohren, insbesondere manometerfedern
DE3331504A1 (de) 1983-06-04 1984-12-06 Georg Hartmann Maschinenbau GmbH, 4795 Delbrück Beutel-verschliessvorrichtung
DE3641985A1 (de) * 1986-12-09 1988-06-16 Stanko Tonsic Verfahren zum verlegen oder austauschen von platten an fassaden
DE3701612A1 (de) * 1987-01-21 1988-08-04 Benteler Werke Ag Verfahren zum biegen von rohren und stuetzdorn zur durchfuehrung des verfahrens
US5131254A (en) * 1991-01-29 1992-07-21 Whitefab, Inc Apparatus for bending beams

Also Published As

Publication number Publication date
DE4423487A1 (de) 1996-01-18
EP0695591A1 (fr) 1996-02-07
DE59507463D1 (de) 2000-01-27
ATE187907T1 (de) 2000-01-15
DE4423487C2 (de) 1998-01-15

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