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EP1948371B1 - Maschine zum wölben, formen, falzen oder biegen von stäben, drähten oder extrudierten formkörpern und diese einsetzendes verfahren - Google Patents

Maschine zum wölben, formen, falzen oder biegen von stäben, drähten oder extrudierten formkörpern und diese einsetzendes verfahren Download PDF

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Publication number
EP1948371B1
EP1948371B1 EP06808210A EP06808210A EP1948371B1 EP 1948371 B1 EP1948371 B1 EP 1948371B1 EP 06808210 A EP06808210 A EP 06808210A EP 06808210 A EP06808210 A EP 06808210A EP 1948371 B1 EP1948371 B1 EP 1948371B1
Authority
EP
European Patent Office
Prior art keywords
bending
jaw
tube
machine according
jig
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.)
Active
Application number
EP06808210A
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English (en)
French (fr)
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EP1948371A1 (de
Inventor
Joël ETIENNE
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.)
Numalliance SAS
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Numalliance SAS
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Publication of EP1948371A1 publication Critical patent/EP1948371A1/de
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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
    • B21D7/024—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment by a swinging forming member
    • 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
    • B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
    • B21D11/10—Bending specially adapted to produce specific articles, e.g. leaf springs
    • B21D11/12—Bending specially adapted to produce specific articles, e.g. leaf springs the articles being reinforcements for concrete
    • 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
    • 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 machine for bending, forming, folding or bending bars, wires or profiles, according to the preamble of claim 1 (see for example FR-A-2,841,162 ).
  • Chairs, dryers, chandeliers, displays and many objects are made with bars, tubes or angled profiles, sometimes bent in three dimensions into complex shapes. These forms are made by means of bending machines that deform the elements without breaking them while maintaining minimal crushing.
  • bending machines have different bending heads to achieve deformations of the elements in three dimensions in two or more steps as required.
  • this operation is performed by orientation heads placed between the bending elements or by bending heads allowing multiple deformations such as those described in the document EP 1 272 293 of the plaintiff.
  • the invention therefore aims to solve these major difficulties by providing a bending machine with a bending head of a new type.
  • the bending jaw can be moved in a peripheral area to the bending form so as to apply to the tube to be bent in multiple configurations.
  • tube is used in the description below to generally designate a part that can be a bar, a wire, a profile or a tube before bending.
  • a bending machine comprises a frame supporting the bending form, a clamping device for maintaining the tube throughout its shaping and a tube orientation device.
  • a clamping device for maintaining the tube throughout its shaping
  • a tube orientation device for maintaining the tube throughout its shaping
  • Figures 3 to 28 only schematically show the essential elements of the machine, namely the bending form and the bending jaw.
  • the prior art of the bending technique is known in two main forms, a so-called “swallowing” technique, shown in FIG. figure 1 , and a so-called “winding” technique illustrated on the figure 2 .
  • the tube 1 is clamped on the bending form 2 and rotated by the latter.
  • the tube 1 being maintained during bending by a strip 3 which can be fixed or sliding.
  • This machine has several drawbacks in particular because for segments between weak hangers the jaw must be machined to the shape of the previous hanger, in that the bending head is unidirectional and thus the bending is only feasible in a clockwise direction or counterclockwise, and that the jaw to ensure the non-sliding of the tube during bending can print marks on it, especially in the case of light alloys.
  • the tube 1 is flanged on the fixed part and a movable member carried by the head 4, for example a roller 5, winds the tube on the fixed form 6.
  • the two essential elements of the bending machine according to the invention are schematized on the figure 3 .
  • the bending form 7 is double in this representation and the bending jaw 8 has a particular prismatic shape.
  • the bending form may be symmetrical or non-symmetrical. According to a variant of the invention illustrated in figure 28 it is also envisaged the use of a simple form of bending with a particular clamping device.
  • the double bending form 7 allows folds in the clockwise or counterclockwise direction depending on the position of the bending jaw 8.
  • the tube to be deformed being positioned in the center of the double shape and maintained inside thereof.
  • the jaw 8 of bending is prismatic and machined to the radius of the tube on at least one of its faces.
  • the jaw will be machined on its two lateral faces 9, 10 so as to allow bending in the two possible directions in the plane of the bending form.
  • the inner shape of the jaw 8 is generally concave and advantageously of complementary shape with dimensions adapted to fit the semicircle of the bending form.
  • the bending jaw 8 can move in three dimensions around the bending form and adopt a multitude of positions to achieve the bends.
  • FIGS. 7 to 9 show a clockwise bending with attachment of the bending jaw very close to the bending form.
  • the Figures 10 and 11 show the positioning of the jaw 8 for a bending in the counterclockwise direction and the position of said jaw 8 at the end of bending.
  • the Figures 12 and 13 have a displacement of the bending jaw 8 along the axis of the tube 1, the winding around the shape is accordingly more pronounced.
  • FIGS. 14 and 15 show an example of bending taking into account an attachment 13 placed on the tube, ancillary parts that can be carried by tubes before bending are for example flanges, valves, fittings, etc ... in this example the bit 8 maintains its position relative to the ancillary part throughout the bending by describing an arc.
  • the Figures 16 to 18 illustrate a bending using a two-stage bending jaw 14 to support the previous hanger to meet a minimum straight segment between hangers. It can also be provided a recess arranged in the form of bending in the case of chained or nested hangers.
  • the jaw can move in rotation about its median axis 12 and along this same vertical axis, in fact it is advantageous to place different machined shapes on the sides of the jaw so as to achieve different bends with the same bit.
  • a two-stage bending jaw 14 may have a stage 15 used in a first bend and a second stage 16, in the vertical direction, used for a second folding once retracted said stage 15, the reoriented tube and the jaw 14 moved up.
  • This retraction of one or more stages can be achieved in different ways, for example by pivoting the stage about an axis 18.
  • the bending machine may comprise a jaw having at least one retractable facet, and said retractable facet is retracted by tilting or pivoting about a hinge disposed on the jaw itself.
  • FIGS. 19 to 21 show a variant of the invention in which the behavior of the tube bending does not tolerate the free winding of the tube, for example in a case where there is a risk of waves or breakage of a thin-walled tube, in this case situation it is advantageous to manufacture a very long bending jaw 19 for maintaining the tube 1 during bending.
  • the bending jaw 19 operates a rocking movement respecting the tangency of the curvature of the hanger so that there is no sliding of the bending jaw relative to the bent tube.
  • the jaw can move in a peripheral area in the form of double bending, this is particularly advantageous in the case where obstacles are on the part to be made and that the bending must be particularly pronounced.
  • Figures 22 to 27 it is possible to move the jaw and perform the bending in successive sequences of weak angles, these sequences are determined by the developed length that allows the length of the bending jaw.
  • the invention also relates to a method of bending a tube employing a machine as described above wherein the jaw is moved at least once on said tube during the shaping operation.
  • the jaw can be moved in a peripheral area 11 to the bending form.
  • the jaw can be moved in a vertical direction or in rotation about a vertical axis therethrough, perpendicular to the bending plane, or a combination of the two previous movements.
  • Figures 22 to 27 An example of moving the bit during bending is illustrated in Figures 22 to 27 , the Figures 22 and 23 representing the bending of the first sector of a tube 1 comprising an obstacle 20, the Figures 24 and 25 representing the release of the jaw 8 and its repositioning on the tube after the obstacle 20. Finally the Figures 26 and 27 illustrate the bending of the second sector.
  • FIG. 28 An important variant of the invention is represented on the figure 28 .
  • This variant consists in providing a symmetrical or non-symmetrical simple bending form, stepped or unstaged 21, with a device for clamping the tube 1 mounted on a rocker 22 and comprising two clamping jaws which may be straight or have a stepped shape or not stepped 23 and 24.
  • the bending jaws 23 and 24 may themselves be equipped with bending shapes, so as to multiply the possible combinations.
  • the bending jaw 8 is prismatic and machined to the radius of the tube on at least one of its faces, the movement kinematics of the bending jaw is effected in a peripheral area at the bending form and the jaw is steerable both in rotation and movable on a vertical axis.
  • clamping jaws 23 and 24 allow an alternating clamping on the right or left and the tilting device allows to completely retract the jaw inoperative of the work area and allowing the realization of bending up to 180 °.
  • the rocker 22 comprises two crank pins ensuring the guide of the balance and its trajectory in a form 25.
  • Which form 25 having flanges so as to ensure precisely the desired movement.
  • the rocker 22 is driven by a crankshaft assembly, pin and square nut sliding in a groove of the balance.
  • the rocker 22 is tilted to the right, the inoperative clamping jaw 23 is located below the working zone, that is to say below the bending plane, the active clamping jaw 24 firmly holds the tube 1 on the bending form 21 while the jaw 8 bending performs the bending during its movement in the peripheral space of the bending form 21.
  • Such deformation can be operated at 180 °.
  • the bending machine can for example be envisaged a conformation of the jaw 8 of simple or complex bending, with one or more facets, which facets can be articulated in different ways on the jaw, and it can be provided a jaw with several floors without departing from the scope of the invention, as claimed.
  • tubes, bars, wires or profiles can be of various sizes and natures without departing from the scope of the invention, as claimed.
  • the machine comprising the features of the invention may also be numerically controlled or not.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Package Frames And Binding Bands (AREA)
  • Ropes Or Cables (AREA)
  • Basic Packing Technique (AREA)

Claims (14)

  1. Maschine zum Wölben, Formen, Falzen oder Biegen einer Röhre, eines Stabs, eines Drahts oder eines Profils, die eine Biegeform (7, 21) aufweist, die über ein Spannsystem, eine Ausrichtvorrichtung für die Röhre (1) und eine Biegebacke (8) verfügt, bei der:
    - die Biegebacke (8) prismenförmig ist und auf mindestens einer ihrer Seiten (9, 10) auf den Radius der Röhre (1) bearbeitet ist, und
    - die Bewegungskinematik der Biegebacke (8) in einem Umfangsbereich (11) zu der Biegeform (7, 21) durch jede Kombination von mindestens zwei Bewegungen, geradlinig oder drehend, sichergestellt ist, dadurch gekennzeichnet, dass
    - die Biegebacke (8) durch eine Drehung um eine senkrecht zu der Biegeebene verlaufende Mittenachse (12) ausrichtbar ist, und dass
    - die Biegebacke (8) in die vertikale Richtung beweglich ist, um mehrfaches Biegen zu erlauben.
  2. Maschine nach Anspruch 1, bei der die Biegebacke (8) in einem Umfangsbereich (11) zu der Biegeform (7, 21) derart bewegt werden kann, dass die zu biegende Röhre (1) in vielfachen Konfigurationen gefasst wird.
  3. Maschine nach Anspruch 2, bei der die Biegebacke (14) mindestens eine bearbeitete Facette auf einer - auf die vertikale Richtung bezogen - anderen Stufe (16) aufweist, die ein anderes Biegen erlaubt.
  4. Maschine nach Anspruch 3, bei der eine andere Stufe (16) der Backe (14), die für ein anderes Biegen verwendbar ist, gegenüber der zu biegenden Röhre (1) mittels einer vertikalen Bewegung und/oder einer Drehbewegung der Backe (14) in Bezug zu der Biegeform (7, 21) positioniert wird.
  5. Maschine nach Anspruch 3, bei der die Biegebacke (14) mindestens eine einziehbare Stufe (15) aufweist.
  6. Maschine nach Anspruch 5, bei der die einziehbare Stufe (15) durch Schwenken oder Kippen um eine Anlenkung, die auf der Backe (14) angeordnet ist, eingezogen wird.
  7. Maschine nach einem der vorhergehenden Ansprüche, bei der die Biegeform (7) doppelt ist.
  8. Maschine nach einem der Ansprüche 1 bis 6, bei der die Biegeform (21) einfach oder doppelt ist und die Spannvorrichtung der Röhre (1) auf der Biegeform (21) von einem Schwinghebel (22) getragen wird.
  9. Maschine nach Anspruch 8, bei der der Schwinghebel (22) zwei Backen (23, 24) trägt, die die Röhre (1) abwechselnd auf jeder Seite der Biegeform (21) und derart spannen können, dass, wenn eine Backe (23) oder (24) die Röhre umspannt, die andere Backe (23) oder (24) außerhalb der Biegebene der Röhre (1) liegt.
  10. Maschine nach Anspruch 9, bei der die zwei Backen (23, 24) selbst mit Biegeformen ausgestattet sind.
  11. Verfahren zum Biegen einer Röhre (1), das eine Maschine nach Anspruch 1 einsetzt, bei der die Biegebacke (8) im Laufe des Formvorgangs mindestens ein Mal auf der Röhre (1) bewegt wird.
  12. Verfahren zum Biegen einer Röhre (1) nach Anspruch 11, bei dem die Biegebacke (8) in einem Umfangsbereich (11) zu der Biegeform (7, 21) verschoben werden kann.
  13. Verfahren zum Falzen einer Röhre nach Anspruch 12, bei dem die zu formende Röhre (1) mindestens einen Nebenteil (13, 20) aufweist.
  14. Verfahren zum Biegen einer Röhre (1) nach den Ansprüchen 11 oder 12, bei dem die Biegebacke (8) in eine vertikale Richtung oder in Drehung um eine durch sie verlaufende vertikale Achse oder gemäß einer Kombination der zwei vorhergehenden Bewegungen verschoben wird.
EP06808210A 2005-10-28 2006-09-28 Maschine zum wölben, formen, falzen oder biegen von stäben, drähten oder extrudierten formkörpern und diese einsetzendes verfahren Active EP1948371B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0511016A FR2892648B1 (fr) 2005-10-28 2005-10-28 Machine pour la cambrage, le fromage, le pliage ou le cintrage de barres, de fils ou de profiles
PCT/FR2006/002197 WO2007048893A1 (fr) 2005-10-28 2006-09-28 Machine pour la cambrage , le fromage , le pliage ou le cintrage de barres , de fils ou de profiles et procede employant une telle machine

Publications (2)

Publication Number Publication Date
EP1948371A1 EP1948371A1 (de) 2008-07-30
EP1948371B1 true EP1948371B1 (de) 2009-01-21

Family

ID=36939249

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06808210A Active EP1948371B1 (de) 2005-10-28 2006-09-28 Maschine zum wölben, formen, falzen oder biegen von stäben, drähten oder extrudierten formkörpern und diese einsetzendes verfahren

Country Status (9)

Country Link
US (1) US8220304B2 (de)
EP (1) EP1948371B1 (de)
AT (1) ATE421392T1 (de)
BR (1) BRPI0617825A2 (de)
CA (1) CA2625872A1 (de)
DE (1) DE602006005011D1 (de)
ES (1) ES2321656T3 (de)
FR (1) FR2892648B1 (de)
WO (1) WO2007048893A1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITRM20130259A1 (it) 2013-05-02 2014-11-03 Cml Int Spa Macchina curvatrice del tipo a matrice e contromatrice per curvare a destra e a sinistra un pezzo allungato
US10840784B2 (en) * 2014-12-26 2020-11-17 Hitachi Automotive Systems, Ltd. Coil forming device and coil of a rotating electric device

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2389937A (en) * 1943-03-29 1945-11-27 Schmitt Alfred Tube bending machine
US4206629A (en) * 1979-03-05 1980-06-10 American Machine & Hydraulics, Inc. Back shoe for a tube bender
DE3616302A1 (de) * 1986-05-14 1987-11-19 Schwarze Rigobert Rohrbiegemaschine
US4833907A (en) * 1987-12-04 1989-05-30 Samuel Grimaldo Consolidated backshoe die for a tube bender machine
FR2715334B1 (fr) * 1994-01-21 1996-03-08 Automatisation Ste Francaise Machine pour cintrer un matériau se présentant sous une forme sensiblement rectiligne.
US6155091A (en) * 1999-02-26 2000-12-05 Arvin Industries, Inc. Mandrel assembly for tube-bending apparatus
FR2806943B1 (fr) * 2000-04-03 2002-08-16 Macsoft Machine de cintrage de barres a nez de pliage effacable
US6651475B1 (en) * 2002-05-03 2003-11-25 Beckett Gas, Inc. Tube bending apparatus
FR2841162B1 (fr) * 2002-06-25 2005-01-14 Silfax Support de reglette pour machine a cintrer les tubes

Also Published As

Publication number Publication date
FR2892648A1 (fr) 2007-05-04
EP1948371A1 (de) 2008-07-30
CA2625872A1 (fr) 2007-05-03
DE602006005011D1 (de) 2009-03-12
ES2321656T3 (es) 2009-06-09
US8220304B2 (en) 2012-07-17
BRPI0617825A2 (pt) 2011-08-09
US20080295559A1 (en) 2008-12-04
WO2007048893A1 (fr) 2007-05-03
ATE421392T1 (de) 2009-02-15
FR2892648B1 (fr) 2007-12-14

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