EP0445044B1 - Rohrbiegevorrichtung mit zwei Biegeköpfen - Google Patents

Rohrbiegevorrichtung mit zwei Biegeköpfen Download PDF

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Publication number
EP0445044B1
EP0445044B1 EP91420013A EP91420013A EP0445044B1 EP 0445044 B1 EP0445044 B1 EP 0445044B1 EP 91420013 A EP91420013 A EP 91420013A EP 91420013 A EP91420013 A EP 91420013A EP 0445044 B1 EP0445044 B1 EP 0445044B1
Authority
EP
European Patent Office
Prior art keywords
bending
tube
head
heads
bent
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
EP91420013A
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English (en)
French (fr)
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EP0445044A1 (de
Inventor
Jean Lafrasse
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.)
Eaton Leonard Picot SA
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Eaton Leonard Picot SA
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 Eaton Leonard Picot SA filed Critical Eaton Leonard Picot SA
Priority to AT91420013T priority Critical patent/ATE93421T1/de
Publication of EP0445044A1 publication Critical patent/EP0445044A1/de
Application granted granted Critical
Publication of EP0445044B1 publication Critical patent/EP0445044B1/de
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
    • B21D7/00—Bending rods, profiles, or tubes
    • B21D7/02—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment
    • B21D7/022—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment over a stationary forming member only
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F1/00—Bending wire other than coiling; Straightening wire

Definitions

  • the present invention relates to a machine for bending tubes. More particularly, this invention relates to a machine provided with two bending heads, movable one and the other in the initial direction of the tube to be bent, and each equipped with a bending tool working in a plane of bending whose orientation is modifiable by the action of control means and may be different from the orientation of the bending plane in which the other bending head works, machine in which at least one of the two bending heads is also provided movable in a plane perpendicular to the initial direction of the tube to be bent, and carries means for pinching the tube.
  • the two bending heads are usually arranged on either side of a fixed or rotating central clamp, provided for holding the tube to be bent.
  • the two bending heads working simultaneously or alternately, are gradually brought closer to the central clamp, each bending head making it possible to produce several successive bends on the corresponding half of the tube, the different bends being able to locate in separate planes from each other.
  • bending machines of this kind make it possible to produce multiple bends with high efficiency, on tubes of relatively great length, and thus these machines find applications in particular in the field of the automobile industry, for example for the production of conduits for braking circuits.
  • At least one of the two bending heads is provided movable also in a plane perpendicular to the initial direction of the tube to be bent, and this head carries means for pinching the tube.
  • this head carries means for pinching the tube.
  • the central clamp is retracted, and the tube can be held by the clamping means provided on one of the heads, while the bending is carried out using the other head.
  • the clamping means carried by a bending head coincide with the axis of this head, and there is always the problem of bringing the two heads together, therefore of producing very close bends in the middle region of the tube.
  • the present invention aims to provide a machine for bending tubes of the type under consideration, effectively allowing very close bends to be made in the median region of the tube, always ensuring correct immobilization of this tube.
  • the subject of the invention is a machine for bending tubes with two bending heads, of the type specified in the introduction, in which said means for pinching the tube are offset with respect to the longitudinal axis of the bending head which carries them, so that, this bending head being spaced from the initial axis of the tube to be bent, the associated pinching means then come in this axis and are able to temporarily hold the tube to be bent there.
  • the machine for bending tubes according to the invention is devoid of central clamp, without this affecting its operation: its two bending heads are actuated alternately, one of the heads producing an elbow on the tube in the plane of desired bending while the other head maintains the same tube.
  • the two bending heads reach the median region of the tube, one of the heads can slip away, for example behind this tube, so that it no longer constitutes an obstacle to an additional advance of the other head bending, for the realization of a last bend which can be very close to that previously formed.
  • the tube is held tight by the clamping means carried by the clamping head which has been moved away from the initial axis of the tube.
  • the two bending heads of the machine are both provided movable in a plane perpendicular to the initial direction of the tube to be bent, so that each can be spaced from the initial axis of the tube to be bent, and each bending head carries means for pinching said tube, offset from the longitudinal axis of this head.
  • each bending head is carried by the free end of a support arm pivotally mounted, about an axis parallel to the initial direction of the tube to be bent, on a part of a carriage which can itself be moved in this direction, and motorized control means are provided for actuating the pivoting support arm, so as to separate the corresponding bending head from the initial axis of the tube to be bent, or to return said bending head to this axis.
  • the motorized control means can here be constituted by a jack, mounted between a part of the carriage and the pivoting support arm of the bending head.
  • each bending head is itself provided, towards its end situated on the side of its bending tool, with a support rod substantially perpendicular to the initial direction of the tube to be bent, this support rod being provided at its free end with the aforementioned clamping means.
  • the latter can be produced in the form of a clamp with two opposite jaws, pivoting symmetrically under the action of motorized control means. The distance between the clamp and the longitudinal axis of the bending head defines the distance by which this head must be offset, to bring the clamp into its active position, where it can temporarily hold the tube to be bent.
  • the pinching means can be fixedly mounted on the associated bending head. These means can also be provided retractable, so as not to constitute obstacles when they do not intervene, and in particular so as not to hinder the movement of the tube during bending.
  • the machine for bending tubes shown as a whole in Figure 1, comprises a bench 1 elongated in the horizontal direction.
  • the bench 1 comprises two parallel horizontal guide columns 2 and 3, along which are movable in translation two carriages 4 and 5.
  • the first carriage 4 is equipped with a gear motor 6 controlling its movement along the guide columns 2 and 3, by means of a not shown pinion which engages with a horizontal rack 7 carried by the bench 1.
  • the second carriage 5 is also equipped with a geared motor 8 controlling its movement along the columns of guide 2 and 3, by means of a pinion which engages with the same rack 7.
  • the first carriage 4 carries a first bending head 9, and the second carriage 5 carries a second bending head 10, the two bending heads 9 and 10 being normally positioned along the same horizontal axis 11, along which the tube is also arranged to bend 12, initially straight.
  • the two bending heads 9 and 10 can be moved one and the other horizontally in the initial direction of the tube to be bent 12.
  • each carriage 4 or 5 has an upwardly facing part, respectively 13 or 14. At the top of this part 13 or 14 is pivotally mounted, around a horizontal axis 15 parallel to the initial direction of the tube to be bent 12, a support arm respectively 16 or 17.
  • the first bending head 9 is carried by the free end of the pivoting support arm 16 associated with the first carriage 4, and the second head bending 10 is carried by the free end of the pivoting support arm 17 associated with the second carriage 5.
  • a jack 18 is mounted between the part 13 of the first carriage 4 and a point of the associated support arm 16, to control a pivoting of this support arm 16 around the axis 15, and thus move the first bending head 9 on a circular path 19, in a plane perpendicular to the initial direction of the tube to be bent 12.
  • the first bending head 9 can thus be moved away from the initial axis 11 of the tube to be bent.
  • another jack 20 is mounted between the part 14 of the second carriage 5 and a point of the associated support arm 17, to control a pivoting of this support arm 17 around the axis 15, and thus move the second head bending 10 on a circular path, in a plane perpendicular to the initial direction of the tube to be bent 12.
  • the second bending head 10 can thus also be spaced from the initial axis 11 of the tube to be bent.
  • each bending head 9 or 10 has a body with a cylindrical appearance, having a longitudinal slot 21 which allows the lateral insertion and exit of the tube to be bent 12.
  • each bending head 9 or 10 At its outer end, that is to say distant from the other head, each bending head 9 or 10 comprises a bending tool of known type, essentially constituted by a forming roller 22 and by a bending roller 23, the latter being carried by a pivoting radial arm 24 and thus able to rotate around the forming roller 22. All the bending tools are mounted rotating around the longitudinal axis of the bending head 9 or 10, so as to modify the orientation of the bending plane .
  • Motorized control means indicated generally at 25 in FIGS.
  • the body of the first bending head 9 is provided, on the side of the bending tool, with a support rod 26 substantially perpendicular to the longitudinal axis of this head, as well as to the direction of the support arm 16 of this head 9. At its free end, the support rod 26 is provided with clamping means, generally designated by 27.
  • the body of the second bending head 10 is provided, on the side of the bending tool, with a support rod 28 substantially perpendicular to the longitudinal axis of this head, as well as to the direction of the support arm 17 of this head 10.
  • the support rod 28 is provided with pinching means, generally designated by 29.
  • the clamping means 27 or 29 can be produced, as shown in particular in FIG. 4, in the form of a clamp with two opposite jaws 30 and 31, which can pivot symmetrically between an open position and a closed position under the action of motorized control means 32.
  • the clamp is designed to grip the tube to be bent 12 between its two jaws 30 and 31.
  • D denotes the distance which separates this clamp from the longitudinal axis of the bending head.
  • the bending machine further comprises an automatic handling device, generally designated by 32.
  • the handling device 32 comprises a support leg 33, fixed to the middle of the bench 1 and carrying a double loading arm 34, pivotally mounted about a horizontal axis 35 parallel to the initial axis 11 of the tube to be bent.
  • Gripping means 36 for example magnetic, capable of retaining a tube, are provided at the ends of the arms of the double loading arm 34.
  • the waiting tubes 12 rest on an inclined plane 37.
  • the double loading arm 34 picks up the tube 12 located at the lowest point of the inclined plane 37, and it brings this tube, by a movement in an arc 38, as far as the axis 11 along which the two bending heads 9 and 10 normally move.
  • These heads 9 and 10 then being spaced apart as shown in FIG. 10, and sufficiently distant from one another to allow the passage of the double loading arm 34 (or, possibly, sufficiently close to one another to allow the two loading arm to pass on either side of the two heads 9 and 10).
  • the two bending heads 9 and 10 are then brought back in the axis 11 to take up the tube to be bent 12. These heads 9 and 10 are then spaced from one another, in the direction of the ends of the tube 12, and they can thus come up to the stop against end caps or nuts provided at the ends of the tube 12. Finally the double arm 34 of the handling device 32 is returned to its starting position, at the lowest point of the inclined plane 37, s' it has not been previously retracted.
  • the two bending heads 9 and 10 remaining in the normal working position on the axis 11 (see FIG. 2), moved alternately one towards the other along this axis 11, to execute bends alternately on the two halves of the tube to be bent 12. While a bending head 9 or 10 bends the desired angle in the corresponding tube half, this according to a bending plane determined by the orientation of its bending tools , the other bending head 10 or 9 maintains the tube 12 in the corresponding half. One of the bending heads 9 or 10 also maintains the tube 12 during bending while the other head is moved along the axis 11. This alternative bending process can continue, until the two heads 9 and 10 arrive in close proximity to each other, as shown in Figure 5, in the middle region of the tube 12.
  • FIG. 5 shows that the last two elbows, which can be produced on the tube 12 by means of the respective bending tools of the two heads 9 and 10, are then separated at least by a distance E equal to substantially twice the length of a head of bending.
  • the bending roller 23 of the first head 9 for example is first brought back to the starting position (corresponding to a zero bending angle), as shown Figure 6.
  • the first bending head 9 is spaced from the initial axis 11 of the tube 12, over a distance D, so that the clamping means 27 carried by this head 9 is placed in the axis 11.
  • the pinching means 27 are then actuated so as to firmly hold the tube 12, in its rectilinear part located between the last two elbows formed.
  • the second bending head 10 is then moved along the axis 11 in the direction of the clamping means 27, without encountering any obstacle since the first head 9 has been previously overshadowed. This additional movement is illustrated in Figure 8.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)

Claims (8)

  1. Rohrbiegemaschine mit zwei Biegeköpfen (9,10), die entlang der ursprünglichen Richtung des zu biegenden Rohrs (12) zueinander verschiebbar sind, und von denen jeder mit einem Biegewerkzeug (22, 23, 24) ausgerüstet ist, das in einer Biegeebene arbeitet, deren Ausrichtung durch die Einwirkung von Steuermitteln (25) modifizierbar ist und unterschiedlich zur Ausrichtung der Biegeebene sein kann, in der der andere Biegekopf arbeitet, wobei wenigstens einer der beiden Biegeköpfe (9, 10) auch in einer Ebene senkrecht zur ursprünglichen Richtung des zu biegenden Rohrs (12) beweglich ausgebildet ist und Spannmittel (27, 29) für das Rohr (12) trägt, dadurch gekennzeichnet, daß die genannten Spannmittel (27, 29) für das Rohr (12) in Bezug auf die Längsachse des sie tragenden Biegekopfs (9, 10) so versetzt sind, daß bei von der ursprünglichen Achse (11) des zu biegenden Rohrs entferntem Biegekopf (9, 10) die damit verbundenen Spannmittel (27, 29) dann auf diese Achse (11) gelangen und dazu geeignet sind, dort zeitweilig das zu biegende Rohr (12) zu halten.
  2. Rohrbiegevorrichtung mit zwei Biegeköpfen nach Anspruch 1, dadurch gekennzeichnet, daß die beiden Biegeköpfe (9, 10) zueinander beweglich in einer Ebene senkrecht zur ursprünglichen Richtung des zu biegenden Rohrs (12) ausgebildet sind, so daß sie jeweils von der ursprünglichen Achse (11) des zu biegenden Rohrs entfernt werden können, und daß jeder Biegekopf (9, 10) die Spannmittel (27, 29) des genannten Rohrs (12) trägt, die in Bezug auf die Längsachse dieses Kopfes versetzt sind.
  3. Rohrbiegevorrichtung mit zwei Biegeköpfen nach Anspruch 2, dadurch gekennzeichnet, daß jeder Biegekopf (9, 10) vom freien Endbereich eines Tragarms (16, 17) gehalten wird, der schwenkbar um einen zur ursprünglichen Richtung des zu biegenden Rohrs (12) parallele Achse (15) an einem Bereich (13, 14) eines Wagens (4, 5) montiert ist, der selbst entlang dieser Richtung verschiebbar ist, und dassmotorische Steuermittel (18, 20) zum Betätigen des schwenkbaren Tragarms (16, 17) vorgesehen sind, um den entsprechenden Biegekopf (9, 10) von der ursprünglichen Achse (11) des zu biegenden Rohrs zu entfernen, oder um den genannten Biegekopf (9, 10) auf diese Achse (11) zu bringen.
  4. Rohrbiegevorrichtung mit zwei Biegeköpfen nach Anspruch 3, dadurch gekennzeichnet, daß die motorischen Steuermittel durch einen Zylinder (18, 20) gebildet werden, der zwischen einem Bereich (13, 14) des Wagens (4, 5) und den schwenkbaren Tragarm (16, 17) des Biegekopfs (9, 10) montiert ist.
  5. Rohrbiegevorrichtung mit zwei Biegeköpfen nach einem der Ansprüche 2 bis 4, dadurch gekennzeichnet, daß jeder Biegekopf (9, 10) selbst an seinem auf Seiten seines Biegewerkzeugs (22, 23, 24) gelegenen Endbereich möglichst rechtwinklig zur ursprünglichen Richtung des zu biegenden Rohrs (12) mit einer Tragstange (26, 28) versehen ist, die an ihrem freien Endbereich mit den genannten Spannmitteln (27, 29) ausgerüstet ist.
  6. Rohrbiegevorrichtung mit zwei Biegeköpfen nach Anspruch 5, dadurch gekennzeichnet, daß die mit jedem Biegekopf (9, 10) verbundenen Spannmittel (27, 29) in der Form einer Zange mit zwei gegenüberliegenden Klemmbacken (30, 31) ausgebildet sind, die symmetrisch unter der Einwirkung der motorisierten Steuermittel (32) schwenkbar sind.
  7. Rohrbiegevorrichtung mit zwei Biegeköpfen nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die Spannmittel (26, 27) fest am damit verbundenen Biegekopf (9, 10) montiert sind.
  8. Rohrbiegevorrichtung mit zwei Biegeköpfen nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die Spannmittel (26, 27) einziehbar ausgebildet sind.
EP91420013A 1990-01-26 1991-01-17 Rohrbiegevorrichtung mit zwei Biegeköpfen Expired - Lifetime EP0445044B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT91420013T ATE93421T1 (de) 1990-01-26 1991-01-17 Rohrbiegevorrichtung mit zwei biegekoepfen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9001574 1990-01-26
FR9001574A FR2657546B1 (fr) 1990-01-26 1990-01-26 Machine a cintrer les tubes a deux tetes de cintrage.

Publications (2)

Publication Number Publication Date
EP0445044A1 EP0445044A1 (de) 1991-09-04
EP0445044B1 true EP0445044B1 (de) 1993-08-25

Family

ID=9393573

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91420013A Expired - Lifetime EP0445044B1 (de) 1990-01-26 1991-01-17 Rohrbiegevorrichtung mit zwei Biegeköpfen

Country Status (9)

Country Link
US (1) US5113683A (de)
EP (1) EP0445044B1 (de)
JP (1) JPH05332A (de)
AT (1) ATE93421T1 (de)
CA (1) CA2034723A1 (de)
DE (1) DE69100290T2 (de)
DK (1) DK0445044T3 (de)
ES (1) ES2043454T3 (de)
FR (1) FR2657546B1 (de)

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JPH0565440U (ja) * 1992-02-03 1993-08-31 安川商事株式会社 ワイヤベンディング装置
US5471857A (en) * 1994-03-07 1995-12-05 Mascotech Tubular Products, Inc. Process for hydroforming a vehicle manifold
IT1292692B1 (it) * 1997-03-20 1999-02-11 Schnell Spa Procedimento e macchina per la piegatura automatica di profilati e simili.
IT1290141B1 (it) * 1997-03-21 1998-10-19 Blm Spa Macchina per curvare materiale filiforme come tubi barre o profilati
US6009737A (en) * 1997-07-17 2000-01-04 Arvin Industries, Inc. Tube bender
US6155091A (en) * 1999-02-26 2000-12-05 Arvin Industries, Inc. Mandrel assembly for tube-bending apparatus
FR2800649A1 (fr) * 1999-11-04 2001-05-11 Robolix Sa Machine a cintrer ou a cambrer des profiles et unite de cintrage comprenant deux desdites machines a cintrer
US6230535B1 (en) * 1999-11-18 2001-05-15 Waitt/Fremont Machine L.L.C. Wire bending apparatus
DE102004015073B3 (de) * 2004-03-25 2005-10-06 Langenstein & Schemann Gmbh Vorrichtung und Verfahren zum Biegen eines Werkstücks
EP1955789B1 (de) * 2007-02-07 2010-09-15 WAFIOS Aktiengesellschaft Biegemaschine
ES2322624T3 (es) * 2007-03-14 2009-06-23 Wafios Aktiengesellschaft Enganchador para la empuñadura y la sujecion de piezas de trabajo alargadas, en particular, en maquinas dobladoras.
EP2008764B1 (de) * 2007-06-29 2009-09-23 WAFIOS Aktiengesellschaft Linearführung
IT1401361B1 (it) * 2010-06-10 2013-07-18 Blm Spa Macchina curvatubi con sistema di caricamento automatico e metodo per il caricamento automatico di tubi sulla testa di curvatura di una macchina curvatubi.
CN102847851A (zh) * 2012-09-29 2013-01-02 无锡威华电焊机制造有限公司 钢筋桁架腹杆筋同步送进打弯装置
CN103632841B (zh) * 2013-12-03 2015-09-30 慈溪市宏晟机械设备有限公司 一种电感线圈线端铆接成型机
CN113600711B (zh) * 2021-07-23 2023-04-11 上海建东科技有限公司 一种折弯机
CN114603365B (zh) * 2022-04-01 2023-05-23 杭州富阳海翔机械有限公司 一种搬运车的部件加工装置及其工艺方法
CN115971298A (zh) * 2022-12-14 2023-04-18 杭州格科机械有限公司 一种金属管道加工用折弯装置
CN117600289B (zh) * 2024-01-22 2024-04-19 中国建筑第五工程局有限公司 一种钢管弯折调直的成型设备

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FR2602160B1 (fr) * 1986-08-04 1990-07-20 Latour Fils Procede et machine modulaire de cambrage de fils metalliques
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FR2610852B1 (fr) * 1987-02-17 1993-07-02 Picot Sa Machine a cintrer les tubes, pourvue de deux tetes de cintrage
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US4945747A (en) * 1989-05-11 1990-08-07 Chuo Electric Manufacturing Co., Ltd. Apparatus for bending elongated materials in any direction

Also Published As

Publication number Publication date
FR2657546B1 (fr) 1992-05-22
US5113683A (en) 1992-05-19
FR2657546A1 (fr) 1991-08-02
ES2043454T3 (es) 1993-12-16
JPH05332A (ja) 1993-01-08
DK0445044T3 (da) 1993-11-22
DE69100290D1 (de) 1993-09-30
ATE93421T1 (de) 1993-09-15
EP0445044A1 (de) 1991-09-04
CA2034723A1 (fr) 1991-07-27
DE69100290T2 (de) 1993-12-23

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