EP0109905A1 - Vorrichtung zum Biegen von Rohren - Google Patents

Vorrichtung zum Biegen von Rohren Download PDF

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Publication number
EP0109905A1
EP0109905A1 EP19830402217 EP83402217A EP0109905A1 EP 0109905 A1 EP0109905 A1 EP 0109905A1 EP 19830402217 EP19830402217 EP 19830402217 EP 83402217 A EP83402217 A EP 83402217A EP 0109905 A1 EP0109905 A1 EP 0109905A1
Authority
EP
European Patent Office
Prior art keywords
tube
roller
bending
axis
inner roller
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
EP19830402217
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English (en)
French (fr)
Other versions
EP0109905B1 (de
Inventor
Paul Jestin
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.)
Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0109905A1 publication Critical patent/EP0109905A1/de
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Expired 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
    • B21D7/08—Bending rods, profiles, or tubes by passing between rollers or through a curved die

Definitions

  • the hydraulic brake control lines consist of relatively rigid sections of tubes, but having a certain malleability, comprising rectilinear parts connected by curved parts; these are generally left-hand pieces of which only the joint rectilinear parts are two by two in the same plane with the curved part which connects them; the ends of these tube sections are further provided with threaded connections, and shaped so that these connections cannot escape.
  • the present invention relates to a machine capable of automatically manufacturing such pipes, whatever their type, dimensions and size, provided that it is provided with all the data corresponding to the desired pipe.
  • Bending heads are known through which the tube to be bent arrives axially and passes between two bending rollers, of which an inner roller has a radius equal to the radius of curvature of the desired bending, and an outer roller, whose axis is rotatable around that of the fixed roller situated on a line passing through the axis of the internal roller and which, in the inactive position of the external roller, is perpendicular to the axis of the bending head along which the tube to be bent arrives, with means to rotate it around the axis of the inner roller by an angle equal to the angle at the center desired for this curved part.
  • rollers preferably have peripheral grooves whose radius is substantially equal to the outside radius of the tubes to be bent, so that they are held peripherally and do not tend to collapse during their bending.
  • the bending has a radius of curvature which is a function of the angle at the center of which the axis of the outer roller is rotated around that of the inner roller, and which decreases as the latter increases ; one can find by calculations or by tests, on the one hand, the angle which must rotate the axis of the outer roller around that of the inner roller to obtain a bending of a tube of determined outer diameter whose curve has the desired radius of curvature, and, on the other hand, the length which must advance the tube, and subject it to this bending without modifying the angular position of the outer roller, so that the curved part obtained has the angle at the desired center.
  • the machine comprises a guide nozzle fixed to its front part, immediately behind the internal bending roller, so that it is traversed axially by the tube intended to be bent and that it s opposes the deformation thereof by reaction in opposite direction to that caused by its bending around the inner roller under the action of the outer roller.
  • the machine must of course further include means for advancing the tube to be bent along the axis of its bending head in order to obtain, first, a first straight portion of the desired length, then an equal straight length to that of the contiguous curved part to be produced with a curve having the angle at the desired center, means for pivoting the bending head around the tube by the desired angle so that its working plane is that in which it must be located the contiguous curved part and the rectilinear part which will extend it, and means for pivoting the outer roller around the axis of the inner roller by an angle such that the curved part which it shapes by its rotation has the radius of curvature desired, said means continuing to intervene successively to produce each curved part and the straight part which extends it into the piping.
  • Means can also be provided for cutting the tube below the pipe which has just been completed, and other means for shaping the two ends of the pipe and adapting the conventional threaded connections which it must include.
  • the machine can be fed by rolls of tubes which can be from 2000 to 3000 meters in length, for example, which has a very great advantage for keeping these tubes in good condition, which deteriorate when they are cut in advance.
  • the arrangement must be such that each of these means intervenes automatically, in turn, and for the time necessary to be able to execute the desired operation, as it has been programmed.
  • the bending head shown in Figures 1 and 2 has an inner roller 1, rotatable about a fixed axis 2, and an outer roller 3, rotatable around an axis 4, which is itself pivotally mounted around the axis 2 of the inner roller 1; in the rest position shown, in which these rollers produce no bending, the line joining the axes 2 and 4 of the two rollers 1 and 3 is perpendicular to the axis of the tube 5 intended to be bent by the combined action of the two rollers 1 and 3 and which passes through said bending head.
  • the motor 6 which, by means of the bevel gears 7 and 7a and the straight gears 8, 8a and 8b, drives the outer rack 9 in translation sleeve 10, parallel to tube 5; at the front part of this sleeve 10 are articulated the rear ends of two symmetrical connecting rods 11, the front ends of which are articulated on the lower part of a part 12, forming a yoke, the wings of which are rotatably mounted on the axis 2 of the inner roller l, and between which is mounted the axis 4 of the outer roller 3.
  • the axis 4 of the movable roller 3 is at a distance from the axis 2 of the fixed roller 1 such that there remains between these rollers a slightly larger free space than the diameter of the tube 5; under these conditions, the bending of the tube 5 does not begin until the outer roller 3 comes into contact with the extension 5a of the tube 5, and ensures its bending with a radius of curvature which is a function of the angle which is made turn this outer roller 3 around the axis 2 of the inner roller 1; thus, as shown in Figure 3, when the outer roller 3 has arrived in position 3a, the straight extension of the tube 5 is first located at 5 " ' a; the tube 5 is tangent to the inner roller 1 and the outer roller 3 with a curved part whose center of curvature is O, on the lines joining the axes 2 and 4 of the rollers 1 and 3 at the points of tangency of the tube on these rollers; the corresponding radius of curvature decreases
  • This curved part of the tube 5 is extended by its straight part 5 "a which tangents the outer roller 3; the angle at the center of this curved part is equal to that which the outer roller 3 has been made to pivot about the axis 2 of the inner roller 1; if we want to increase this angle at the center, it suffices to continue advancing the tube 5 through the bending head without modifying the position of the outer roller 3, until this angle reaches l 'desired amplitude; the straight extension of the bending tube is then in position 5 "' a.
  • a guide nozzle 37 is fixed to its front part, immediately behind the internal bending roller 1, so that it is axially traversed by the tube 5 intended to be bent and that it s opposes the deformation of the latter by reaction in the opposite direction to that caused by its bending around the inner roller 1 under the action of the outer roller 3.
  • the plane of this bending head can be modified at will because its active part 14 on which are mounted the inner 1 and outer 3 bending rollers, is itself rotatable inside the sliding sleeve 10, which itself is held in a fixed angular position by the plate 15, sliding in the frame 16 of the bending head and engaged in a longitudinal groove 17 provided for this purpose in the sleeve 10.
  • the bending head shown further comprises a device for shearing the section of tube whose bending has just been completed; it is constituted by two knobs 21 integral in rotation with the pivoting part 14 and mounted, for this purpose, at the inner end of two pushers 22 forming yokes, sliding in corresponding radial bores 23 of the pivoting part 14; the outer edges 25 of these radial pushers 22 are inclined so as to constitute cams cooperating with the female conical surfaces 26 of the front part of the sliding annular part 27; to shear the tube 5, compressed air is made to penetrate through the orifice 28 into 1 "free space 29 provided between the frame 16 and the rear part of the sliding annular part 27, which causes the rearward sliding of this part 27, against a return spring, and, as a result, a centripetal force exerted on the pushers forming yokes 22, the two knobs 21 of which cut the tube, in particular if the pivoting part is driven 14 rotating at high speed by means of the motor 18.
  • such a bending head 30 is mounted on the frame 31 with its three motors, 6 for controlling the pivoting of the axis 4 of the outer roller 3 around that of the inner roller 1 , the motor 18 which makes it possible to pivot the bending plane of the bending head 30 around the tube to be bent 5, and the motor 32 which drives the pairs of rollers 33 which cause the desired sliding of the tube 5 through the head of bending.
  • the machine further comprises a retractable device 33 allowing, before the commencement of the operations of bending the tube 5, to present before the latter, at 34, a threaded connection coming from the supply ramp 35, in a manner known per se, through which the anterior end of said tube is engaged; a suitable device then shapes the front end of this tube so that this threaded connection can no longer escape forward.
  • the rear end of the pipe section which has just been bent and separated, by shearing, from the tube of which it formed the front part, may likewise be provided with a threaded connection and be shaped so that it cannot escape backwards.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
EP19830402217 1982-11-19 1983-11-17 Vorrichtung zum Biegen von Rohren Expired EP0109905B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8219404 1982-11-19
FR8219404A FR2536314B1 (fr) 1982-11-19 1982-11-19 Machine a cintrer les tubes

Publications (2)

Publication Number Publication Date
EP0109905A1 true EP0109905A1 (de) 1984-05-30
EP0109905B1 EP0109905B1 (de) 1987-07-15

Family

ID=9279333

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19830402217 Expired EP0109905B1 (de) 1982-11-19 1983-11-17 Vorrichtung zum Biegen von Rohren

Country Status (3)

Country Link
EP (1) EP0109905B1 (de)
DE (1) DE3372447D1 (de)
FR (1) FR2536314B1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5388441A (en) * 1992-12-29 1995-02-14 United States Surgical Corporation Needle curver with automatic feed
RU2138353C1 (ru) * 1997-07-28 1999-09-27 Акционерное общество "Электростальский завод тяжелого машиностроения" Устройство для гибки длинномерных труб
CN117840275A (zh) * 2024-03-06 2024-04-09 山西中德管业有限公司 一种用于管道弯折的加工装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2221666C1 (ru) * 2002-05-13 2004-01-20 Общество с ограниченной ответственностью фирма "Саратовгазприборавтоматика" Устройство для навивки металлических труб в змеевик

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3373587A (en) * 1966-12-08 1968-03-19 Shubin Vladimir Nikolaevich Automatic tube bending machines
FR2208728A1 (de) * 1972-11-30 1974-06-28 Shubin Vladimir
FR2311604A1 (fr) * 1975-05-21 1976-12-17 Shubin Vladimir Tete de pliage pour machine a plier les tubes
FR2312312A1 (fr) * 1975-03-04 1976-12-24 Shubin Vladimir Machine-outil a plier les tubes
US4161110A (en) * 1977-04-28 1979-07-17 EVG Entwicklungs- und Verwertungs-Gesellschaft mbH. Automatic control device for a bending machine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3373587A (en) * 1966-12-08 1968-03-19 Shubin Vladimir Nikolaevich Automatic tube bending machines
FR2208728A1 (de) * 1972-11-30 1974-06-28 Shubin Vladimir
FR2312312A1 (fr) * 1975-03-04 1976-12-24 Shubin Vladimir Machine-outil a plier les tubes
FR2311604A1 (fr) * 1975-05-21 1976-12-17 Shubin Vladimir Tete de pliage pour machine a plier les tubes
US4161110A (en) * 1977-04-28 1979-07-17 EVG Entwicklungs- und Verwertungs-Gesellschaft mbH. Automatic control device for a bending machine

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5388441A (en) * 1992-12-29 1995-02-14 United States Surgical Corporation Needle curver with automatic feed
US5450739A (en) * 1992-12-29 1995-09-19 United States Surgical Corporation Needle curver with automatic feed
RU2138353C1 (ru) * 1997-07-28 1999-09-27 Акционерное общество "Электростальский завод тяжелого машиностроения" Устройство для гибки длинномерных труб
CN117840275A (zh) * 2024-03-06 2024-04-09 山西中德管业有限公司 一种用于管道弯折的加工装置
CN117840275B (zh) * 2024-03-06 2024-05-31 山西中德管业有限公司 一种用于管道弯折的加工装置

Also Published As

Publication number Publication date
FR2536314A1 (fr) 1984-05-25
FR2536314B1 (fr) 1985-06-21
DE3372447D1 (en) 1987-08-20
EP0109905B1 (de) 1987-07-15

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