EP0168331A2 - Maschine zum Biegen von Rohren, Stangen oder Profilen - Google Patents

Maschine zum Biegen von Rohren, Stangen oder Profilen Download PDF

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Publication number
EP0168331A2
EP0168331A2 EP85420086A EP85420086A EP0168331A2 EP 0168331 A2 EP0168331 A2 EP 0168331A2 EP 85420086 A EP85420086 A EP 85420086A EP 85420086 A EP85420086 A EP 85420086A EP 0168331 A2 EP0168331 A2 EP 0168331A2
Authority
EP
European Patent Office
Prior art keywords
bending
axis
mandrel
jaw
machine
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.)
Granted
Application number
EP85420086A
Other languages
English (en)
French (fr)
Other versions
EP0168331A3 (en
EP0168331B1 (de
Inventor
Jean Lafrasse
Jean Paul Chastan
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
Original Assignee
Eaton Leonard Picot SA
PICOT
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, PICOT filed Critical Eaton Leonard Picot SA
Priority to AT85420086T priority Critical patent/ATE53950T1/de
Publication of EP0168331A2 publication Critical patent/EP0168331A2/de
Publication of EP0168331A3 publication Critical patent/EP0168331A3/fr
Application granted granted Critical
Publication of EP0168331B1 publication Critical patent/EP0168331B1/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
    • B21D7/024—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment by a swinging forming member

Definitions

  • the present invention relates to a machine intended for bending tubes, bars or profiles. More particularly, this invention relates to a machine in which the bending tool mainly comprises a rotary forming roller of vertical axis, having an annular groove and supporting a first jaw - a second jaw carried by a bending arm mounted pivoting around the vertical axis mentioned above, the second jaw being able to be brought opposite the first jaw so as to grip the tube or the like to bend - a horizontal strip able to be applied against the tube or the like to bend, behind the jaws, this strip being movable, remaining parallel to itself, in the direction of its approach or its distance from the horizontal axis along which is positioned the tube or the like to bend.
  • the part of the tube to be bent is clamped between the two jaws and driven forward by the rotation of the bending arm, so as to wind in the groove of the forming roller.
  • the angle of rotation of the arm determines the angle of bending
  • the radius of the forming roller determines the radius of the elbow that the tube will ultimately have.
  • the movable strip applied against the tube behind the part to be bent, avoids any unwanted deformation of the tube outside the part to be bent.
  • a bending head movable in the transverse direction of the frame of the machine, supports all the bending tools, that is to say the forming roller with the first jaw, the arm of bending carrying the second jaw, and the strip.
  • the tube to be bent is pinched, in its part remaining rectilinear, by a clamping mandrel carried by a carriage movable in longitudinal direction, which keeps this part of the tube positioned along a determined horizontal axis, parallel to the longitudinal direction of the frame of the machine. .
  • the present invention avoids these drawbacks.
  • the assembly comprising the forming roller and the first associated jaw, as well as the bending arm pivoting with the second jaw, is carried by a movable bending head, under the action of control means, in a horizontal direction transversely to the frame of the machine and to the axis along which the tube or the like to be bent is positioned, while the movable strip, with its means of movement control, is mounted directly on the machine frame, without connection to the bending head.
  • the strip is thus completely dissociated from the bending head which supports the forming roller, the bending arm and the two jaws.
  • the means for controlling the transverse displacement of the bending head, carrying the forming roller, the bending arm and the two jaws comprise on the one hand a control means for the initial positioning of the bending head , placing the vertical axis of the forming roller in the appropriate position as a function of the radius of this roller, and on the other hand a control means for the offset of said bending head, capable of spreading the axis of the forming roller from the 'axis along which is positioned the tube or the like to bend.
  • the initial position adjustment of the vertical axis of the forming roller, as a function of the diameter of this roller, can be carried out without influencing the position of the strip which is mounted on a support independent of the bending head.
  • the shifting control of the bending head makes it possible to release the forming roller and the first jaw from the tube, which makes it possible to easily modify the orientation of the tube. between two successive bending operations, even if it is a section tube for example square.
  • the offset of the bending head also facilitates a possible change of jaw between two successive bending operations.
  • the means for controlling the transverse displacement of the bending head comprise, on the one hand, a mechanism with threaded rod and nut, with rotary drive of one of these elements, for the initial positioning of the bending head, and on the other hand a double-acting cylinder, for the offset of said bending head.
  • the threaded rod is rotatably mounted and is engaged with a nut secured to the bending head, this threaded rod being linked in rotation with a primary drive shaft relative to which it is axially displaceable, while that the double-acting cylinder, arranged coaxially with the threaded rod, comprises an annular piston axially linked to the threaded rod.
  • the annular piston is advantageously secured to a sleeve which slides in the two flanges of the jack and which is connected in translation with the rotary threaded rod by means of at least one bearing.
  • the machine for bending tubes shown in the drawing, comprises an elongated frame (1) which supports longitudinal guides along which a carriage (2) can be moved in the horizontal direction. At the upper part of the carriage (2) is provided a clamping mandrel (3), able to pinch the bending tube (4) while maintaining it along a determined horizontal axis (5), while allowing the advancement of this tube (4) along the axis (5) and its rotation around said axis (5).
  • a bending head (6) mounted horizontally movable, in a direction transverse to the frame (1).
  • the tool which allows the bending to be carried out mainly comprises: a forming roller (7) with a vertical axis (8), having an annular groove (9) and supporting a first jaw (10) - a second jaw (11), carried by a bending arm (12) pivotally mounted about the vertical axis (8) - a strip (13) extending parallel to the horizontal axis (5) and having a longitudinal groove (14).
  • This tool is completed by an olive (15) placed at the end of a horizontal rod (16) which passes through the clamping mandrel (3) and is introduced into the tube to be bent (4).
  • the bending head (6) to which the vertical axis (8) is linked, is slidably mounted, by a dovetail part (17), along two sliders with inclined faces (18,19) fixed at the front of the frame (1) - see in particular figure 3.
  • an electric motor (20) is provided which, by means of a reduction gear speed (21), rotates a primary shaft (22) hollow over a part of its length where it has internal longitudinal grooves. The latter are engaged with a grooved part (23) of a rotary threaded rod (24), coaxial with the shaft (22) and itself engaged with a nut (25) immobilized in rotation in the bending head.
  • (6) - see figures 2 and 3.
  • the speed reducer housing (21) is integral with the rear flange (26) of a double-acting cylinder (27) whose body (28), coaxial with the shaft (22) , is closed at the front by another flange (29).
  • an annular piston (30) integral with a sleeve (31) which slides in the two flanges (26,29).
  • the sleeve (31) is closed by a cover (32) which is crossed by the primary shaft (22).
  • the front end of the sleeve (31) is linked in translation with the threaded rod (24), by means of bearings (33) and suitable stops.
  • Channels (34, 35) are drilled in the two flanges (26, 29), to supply fluid to the two chambers of the jack (27) located on either side of the annular piston (30) - see figure 2.
  • the strip (13) is movable relative to the frame (1) in a longitudinal direction, under the control of a feed cylinder (38), and also in a transverse direction, under the control of a cylinder approach (39).
  • the bending head (6) with the forming roller (7) and the bending arm (12), is adjustable in transverse position by means of the motor (20), via the reduction gear (21), the primary shaft (22), threaded rod (24) and nut (25).
  • the transverse movement of the bending head (6) thus controlled, makes it possible to position the vertical axis (8) adequately as a function of the diameter of the forming roller (7), itself chosen according to the characteristics desired for the elbow to train.
  • the jack (27) makes it possible to move the bending head (6), still in transverse direction, over a stroke (C) determined so as to obtain an offset of this head (6), allowing free rotation of the tube to bend (4), in particular in the case of a tube of non-circular section, for example a tube (4) of square section.
  • the displacement of the strip (13) is controlled independently of that of the bending head (6), by means of the two jacks (38, 39).
  • the jack (36) makes it possible to raise the second jaw (11), to place it opposite the first jaw (10), or to lower it by moving it away from the first jaw (10), in order to allow the introduction of the bending tube. (4).
  • FIGS. 4 to 12 show the successive stages of the double bending of a tube (4) of square section, on the bending machine object of the invention.
  • the initially straight tube (4) is assumed, at the start, to be positioned in an angular position defined along the horizontal axis (5), and clamped by the mandrel (3) as well as, in its part to be bent first, by the two jaws (10.11).
  • the bending arm (12) is initially oriented perpendicular to the axis (5), and the strip (13) is applied against the tube (4), behind the second jaw (11) - see Figures 4 and 5.
  • the first bending of the tube (4) is then carried out, by controlling the rotation of the bending arm (12) around the vertical axis (8) according to the desired angle, the tube (4) then bending while being guided in the groove (9) of the forming roller (7) - see Figure 6. Then the second jaw (11) is retracted, and the bending arm (12) is returned to its initial angular position - see Figure 7. The strip (13) is moved away from the tube (4) which then has a first bend (40). The carriage with the mandrel (3) is advanced, so as to push the tube (4) forward, releasing the elbow (40) from the roller (7) - see Figure 8.
  • the next phase consists in actuating the jack (27) in a given direction, which shifts the entire bending head (6) by the distance (C) relative to the horizontal axis (5) - see Figure 9.
  • the tube (4) thus freed, is turned using the clamping mandrel (3) around the axis (5) according to the arrow (41 ), for example at an angle of rotation of 180 ° so that its end previously bent to the right is turned to the left - see Figures 9 and 10.
  • the bending head (6) is reset to its initial position by actuating the jack (27) in the opposite direction; the second jaw (11) is again clamped against the tube (4) - see figure 11.
  • the strip (13) is also applied again against the tube (4), and the bending arm (12) is actuated as previously.
  • a second bend (42) is thus produced, in a direction opposite to the first and, in the case taken here for example, situated in the same plane as the first 'bend (40) - see FIG. 12.
  • the offset of the bending head (6), controlled by the jack (27), can also be used to facilitate a change of jaws (10), for example during the production of close bends requiring the installation of recovery jaw on the forming roller (7).
  • the machine according to the invention applies not only to the bending of tubes (4) of all sections, but also to the bending of bars, profiles and other similar objects.
  • the invention is not limited to the sole embodiment of this machine for bending tubes, bars or profiles which has been described above, by way of example; on the contrary, it embraces all of the variant embodiments and applications respecting the same principle.
  • the jack (27) can be replaced by any equivalent means, making it possible to control an offset of the bending head (6).
EP85420086A 1984-07-10 1985-05-09 Maschine zum Biegen von Rohren, Stangen oder Profilen Expired - Lifetime EP0168331B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85420086T ATE53950T1 (de) 1984-07-10 1985-05-09 Maschine zum biegen von rohren, stangen oder profilen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8411321 1984-07-10
FR8411321A FR2567429B1 (fr) 1984-07-10 1984-07-10 Machine pour le cintrage de tubes, barres ou profiles

Publications (3)

Publication Number Publication Date
EP0168331A2 true EP0168331A2 (de) 1986-01-15
EP0168331A3 EP0168331A3 (en) 1986-10-08
EP0168331B1 EP0168331B1 (de) 1990-06-20

Family

ID=9306204

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85420086A Expired - Lifetime EP0168331B1 (de) 1984-07-10 1985-05-09 Maschine zum Biegen von Rohren, Stangen oder Profilen

Country Status (8)

Country Link
US (1) US4625531A (de)
EP (1) EP0168331B1 (de)
JP (1) JPS6138720A (de)
AT (1) ATE53950T1 (de)
CA (1) CA1291697C (de)
DE (1) DE3578316D1 (de)
ES (1) ES8607768A1 (de)
FR (1) FR2567429B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0319400A1 (de) * 1987-12-02 1989-06-07 Societe Nationale D'etude Et De Construction De Moteurs D'aviation, "S.N.E.C.M.A." Rohrleitungsbiegegerät und Verfahren zum Herstellen einer Rohrleitung mit geschweisstem Ansatzstück
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

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4959984A (en) * 1989-08-17 1990-10-02 Ap Parts Manufacturing Company Precision bending apparatus
JP2947362B2 (ja) * 1989-09-07 1999-09-13 臼井国際産業株式会社 チューブの曲げ装置
DE4124715C2 (de) * 1990-07-26 1994-11-24 Usui Kokusai Sangyo Kk Vorrichtung zum mehrfachen Abbiegen eines Metallrohrs
US5570508A (en) * 1993-12-03 1996-11-05 Itt Industries, Inc. Method of making a high strength automotive seat frame
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
NO311638B1 (no) 1999-05-21 2001-12-27 Skipskonsult As Fremgangsmåter for fremstilling av sammenhengende strekk av sirkul¶rsylindriske legemer, anvendelse av et verktöy, og enrörlengde og rördeler
US6434995B1 (en) 1999-10-15 2002-08-20 Usui Kokusai Sangyo Kaisha Limited Method of bending small diameter metal pipe and its apparatus
DE50211964D1 (de) * 2002-07-13 2008-05-08 Trumpf Werkzeugmaschinen Gmbh Rohrbiegemaschine mit Rohrvorschub und Dornrückzug
JP4515056B2 (ja) * 2003-08-01 2010-07-28 三桜工業株式会社 管の曲げ加工装置
IT1396456B1 (it) * 2009-11-24 2012-11-23 Piegatrici Macch Elettr Attrezzatura per la piegatura di prodotti metallici oblunghi, quali barre, tondini, o fili metallici, e relativo procedimento di piegatura
ITRM20120619A1 (it) * 2012-12-06 2014-06-07 Libero Angelo Massaro Macchina perfezionata per curvare tubi metallici, sia a destra che a sinistra rispetto alla direzione di introduzione del tubo.
US9908169B2 (en) * 2013-09-06 2018-03-06 Winton Machine Company Process to cut coax cable
CN110202029B (zh) * 2019-06-18 2020-09-01 深圳市朗奥洁净科技股份有限公司 一种管材自动化数控多段折弯装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2537382A1 (de) * 1975-08-22 1977-03-03 Babcock Ag Vorrichtung zum biegen von rohren
US4126030A (en) * 1977-10-03 1978-11-21 Eaton-Leonard Corporation Retractable pressure die
US4178788A (en) * 1978-03-24 1979-12-18 Eaton-Leonard Corporation Adjustable clamp die
DE2910174A1 (de) * 1979-03-15 1980-09-25 Benteler Werke Ag Rohrbiegemaschine mit einem mit mehreren biegewerkzeugen versehenen biegekopf

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2740454A (en) * 1952-10-02 1956-04-03 Western Electric Co Apparatus for making diagonal twisted or skew bends in wave guide tubing
DE1962590A1 (de) * 1969-12-13 1971-06-24 Hilgers Maschinen U App Bauans Rohrbiegemaschine
DE2101162A1 (de) * 1971-01-12 1972-07-20 J. Banning Ag, 4700 Hamm Rohrbiegemaschine
US4063441A (en) * 1975-09-19 1977-12-20 Eaton-Leonard Corporation Apparatus for bending tubes
JPS5930325B2 (ja) * 1977-12-28 1984-07-26 日本電気株式会社 アイソレ−タ
JPS5858170B2 (ja) * 1979-06-20 1983-12-23 株式会社神戸製鋼所 シヤ−プレスの刃物交換装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2537382A1 (de) * 1975-08-22 1977-03-03 Babcock Ag Vorrichtung zum biegen von rohren
US4126030A (en) * 1977-10-03 1978-11-21 Eaton-Leonard Corporation Retractable pressure die
US4178788A (en) * 1978-03-24 1979-12-18 Eaton-Leonard Corporation Adjustable clamp die
DE2910174A1 (de) * 1979-03-15 1980-09-25 Benteler Werke Ag Rohrbiegemaschine mit einem mit mehreren biegewerkzeugen versehenen biegekopf

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0319400A1 (de) * 1987-12-02 1989-06-07 Societe Nationale D'etude Et De Construction De Moteurs D'aviation, "S.N.E.C.M.A." Rohrleitungsbiegegerät und Verfahren zum Herstellen einer Rohrleitung mit geschweisstem Ansatzstück
FR2624038A1 (fr) * 1987-12-02 1989-06-09 Snecma Outillage de cintrage de canalisations et procede de fabrication d'une canalisation a embout soude
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
EP2799158A1 (de) 2013-05-02 2014-11-05 CML International S.p.A. Biegemaschine mit Stempel und Gegenhalterstempel zum rechts und links Biegen eines länglichen Körpers
US9878361B2 (en) 2013-05-02 2018-01-30 Cml International S.P.A. Die and counter-die type bending machine for right-hand and left-hand bending an elongated piece

Also Published As

Publication number Publication date
FR2567429B1 (fr) 1992-03-27
FR2567429A1 (fr) 1986-01-17
JPS6138720A (ja) 1986-02-24
ES8607768A1 (es) 1986-06-16
ES544059A0 (es) 1986-06-16
DE3578316D1 (de) 1990-07-26
EP0168331A3 (en) 1986-10-08
CA1291697C (fr) 1991-11-05
EP0168331B1 (de) 1990-06-20
US4625531A (en) 1986-12-02
ATE53950T1 (de) 1990-07-15

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