EP0109905B1 - Vorrichtung zum Biegen von Rohren - Google Patents

Vorrichtung zum Biegen von Rohren Download PDF

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Publication number
EP0109905B1
EP0109905B1 EP19830402217 EP83402217A EP0109905B1 EP 0109905 B1 EP0109905 B1 EP 0109905B1 EP 19830402217 EP19830402217 EP 19830402217 EP 83402217 A EP83402217 A EP 83402217A EP 0109905 B1 EP0109905 B1 EP 0109905B1
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EP
European Patent Office
Prior art keywords
tube
roller
bending
bent
axis
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Expired
Application number
EP19830402217
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English (en)
French (fr)
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EP0109905A1 (de
Inventor
Paul Jestin
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Individual
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Individual
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Publication of EP0109905A1 publication Critical patent/EP0109905A1/de
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    • 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.
  • a machine for bending tubes by means of a bending head through which the tube to be bent axially and which comprises at its front part two bending rollers with parallel axes between which said tube passes, namely an inner roller to which the tube remains constantly tangent and on which it bears during bending, and an outer roller, whose axis is rotatable around that of the inner roller, the plane containing the axes of the two rollers being perpendicular to the axis of the tube, in the inactive position of the outer roller, and means for pivoting said axis of the outer roller around that of the inner roller.
  • FR-A 2311 604 a modification of a bending head in which the two bending rollers are mounted on a pivoting lever so that one easily passes from the case where the upper roller constitutes the inner roller in the case where it constitutes the outer roller. This allows bending in different planes and directions.
  • a bending machine comprising a bending head, characterized in that, in order to allow the tube to be bent according to any radii of curvature, provided that they are equal to or greater than that of the inner roller, the axis of the outer roller is placed at a distance from that of the inner roller such that there is between it and the inner roller a space very slightly greater than the diameter of the tube to be bent, leaving a clearance of the order of 1 mm between the outer roller and the tube to be bent when said outer roller is in the inactive position, in that a guide nozzle is fixed to its front part, immediately behind the bending roller interior, so that it is traversed axially by the tube intended to be bent and that it opposes the deformation of the latter by reaction in opposite direction to that proposed by its bending around the inner roller so us the action of the outer roller and in that it further comprises means for cutting the tube once the desired pipe has been made, and other means for shaping the two ends of said pipe and adapt
  • the introduction of the clearance between the rollers, the bending has a radius of curvature which is a function of the angle at the center whose axis of the outer roller is rotated around that of the inner roller, and which decreases as it increases; one can find by calculations or by tests, on the one hand, the angle whose axis of the external roller must be rotated around that of the internal roller to obtain a bending of a tube of determined external diameter whose curve has the desired radius of curvature, and, on the other hand, the length by which the tube must be advanced, and subjected 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 guide nozzle fixed to its front part, one obtains a precision in the position and the radius of the successive bends which could not be achieved with the previously known machines not comprising such a nozzle. guide.
  • 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 will have to be the contiguous curved part and the rectilinear part which will extend it, and means for making pivot 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 desired radius of curvature, said means continuing to intervene successively to produce each curved part and the part straight which extends it into the piping.
  • 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 the preservation in good condition of these tubes, which deteriorate when they are cut to size. 'advanced.
  • 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 1, 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 leaving remain a clearance of the order of 1 mm between the outer roller 3 and the tube 5 to be bent; 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 in 5 "a; the tube 5 is tangent to the inner roller 1 and to the outer roller 3 with a curved part whose center of curvature is at 0, on the lines joining the axes 2 and 4 of the rollers 1 and 3 at the points of tangency of the tube
  • 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 pivoted about the axis 2 of the inner roller 1; if we want to increase this angle in 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 guiding 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 opposes the deformation thereof by reaction in 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 the 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 33a allowing, before the beginning of the bending operations of the tube 5, to present in front of 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.

Claims (8)

1. Vorrichtung zum Biegen von Rohren mittels eines Biegekopfs, durch den hindurch das zu biegende Rohr (5) axial ankommt und der an seinem vorderen Teil zwei Biegerollen mit parallelen Achsen aufweist, zwischen denen das genannte Rohr hindurchtritt, nämlich eine innere Rolle (1), an der das Rohr konstant berührend anliegt und auf der es sich im Laufe des Biegens abstützt, und eine äussere Rolle (3), deren Achse (4) um diejenige (2) der inneren Rolle (1) drehbar ist, wobei die die Achsen der beiden Rollen enthaltende Ebene rechtwinklig zu der Achse des Rohres (5) verläuft, in inaktiver Position der äusseren Rolle (3), und mit Mitteln zum Herumdrehen der Achse (4) der äusseren Rolle (3) um diejenige (2) der inneren Rolle (1), dadurch gekennzeichnet, dass, um das Rohr entsprechend beliebigen Krümmungsradien biegen zu können, vorausgesetzt sie sind gleich oder grösser als derjenige der inneren Rolle (1), die Achse (4) der äusseren Rolle (3) in einem solchen Abstand von derjenigen (2) der inneren Rolle (1) angeordnet ist, dass zwischen ihr und der inneren Rolle ein Raum sehr wenig grösser als der Durchmesser des zu biegenden Rohres (5) besteht, der ein Spiel in der Grössenordnung von 1 mm zwischen der äusseren Rolle (3) und dem zu biegenden Rohr (5) bestehen lässt, wenn sich die genannte äussere Rolle (3) in inaktiver Position befindet, dass eine Führungsbuchse (37) an ihrem vorderen Teil befestigt ist, unmittelbar hinter der inneren Biegerolle (1) derart, dass sie von dem zu biegenden Rohr (5) axial durchquert wird und dass sie sich der Deformation desselben durch Reaktion in entgegengesetztem Sinn zu der durch seine Biegung um die innere Rolle (1) unter der Einwirkung der äusseren Rolle (3) vorgeschlagenen entgegenstellt, und dass sie ausserdem Mittel (21) zum Ablängen des Rohrs, nachdem die gewünschte Leitung einmal hergestellt ist, und andere Mittel (33) zum Gestalten der beiden Enden der genannten Leitung und zum dortigen Anbringen von herkömmlichen, mit Gewinde versehenen Anschlüssen, die vorgesehen sein müssen, aufweist.
2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass ein Motor (6) über Kegelräder (7 und 7a) und Stirnräder (8, 8a, 8b) den äusseren Zahnkranz (9) einer zu dem Rohr (5) konzentrischen Hülse (10) translatorisch und parallel zu diesem Rohr antreibt, und an dem vorderen Teil dieser Hülse (10) die hinteren Enden von zwei symmetrischen Pleuelstangen (11) gelenkig angeschlossen sind, deren vordere Enden gelenkig auf dem unteren Teil eines eine Kappe bildenden Stücks (12) angeschlossen sind, dessen Schenkel drehbeweglich um die Achse (2) der inneren Rolle (1) angeordnet sind und zwischen denen die Achse (4) der äusseren Rolle (3) angeordnet ist.
3. Vorrichtung nach irgendeinem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass der aktive Teil (14) des Biegekopfs, auf dem die innere (1) und äussere (3) Biegerolle angeordnet sind, im Inneren der Schiebehülse (10) drehbeweglich angeordnet ist, die ihrerseits in einer festen Winkelposition durch eine Platte (15) gehalten ist, die in dem Gehäuse (16) des Biegekopfs verschiebbar ist und in einer zu diesem Zweck in der Hülse (10) vorgesehenen Längsnut (17) im Eingriff steht.
4. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, dass ein Motor (18) die innenseitig verzahnte Hülse (19) in Drehbewegung versetzt, die mit der äusseren Verzahnung (20) der Verlängerung des aktiven Teils (14) des Biegekopfs in Richtung auf das hintere Ende (13) im Eingriff steht.
5. Vorrichtung nach irgendeinem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass ein Motor (32) die Rollenpaare (33), zwischen denen das Rohr (5) erfasst ist, in Drehbewegung versetzt und die gewünschte Verschiebung dieses Rohres (5) durch den Biegekopf steuert, was somit eine Vergrösserung des Krümmungswinkels des Teils des Rohrs (5) im Laufe des Biegens ermöglicht, ohne den Krümmungswinkel zu verändern, wenn man die äussere Rolle (3) in der Winkelstellung hinsichtlich derjenigen der inneren Rolle (1) hält, die dem genannten Krümmungsradius entspricht.
6. Automatische Vorrichtung nach irgendeinem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass eine numerische Steuerung die Arbeitsweise aller ihrer Motoren (6, 18 und 32) regelt.
7. Automatische Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, dass die numerische Steuerung einem Programm folgt, das ihr aufgegeben ist, das seinerseits den Charakteristika der herzustellenden Leitungen entspricht.
8. Automatische Vorrichtung nach irgendeinem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass sie Mittel aufweist, um das zu biegende Rohr entlang der Achse ihres Biegekopfs zu bewegen im Hinblick auf die Erreichung zuerst eines ersten geradlinigen Teils gewünschter Länge und dann eines benachbarten Teils mit dem gewünschten Krümmungsradius und Krümmungswinkel, Mittel, um den Biegekopf um seine Achse um den gewünschten Winkel zu drehen, damit seine Arbeitsebene diejenige ist, in der sich der gebogene, benachbarte, folgende Teil des Rohrs und der geradlinige Teil, der diesen verlängert, befinden müssen, und Mittel aufweist, um die äussere Rolle um die Achse der inneren Rolle um einen solchen Winkel zu drehen, dass der gebogene Teil, der sich anschliessend ausbildet, den gewünschten Krümmungsradius aufweist, wobei die genannten Mittel fortfahren, aufeinanderfolgend in Wirkung zu treten, um die verschiedenen gradlinigen und gebogenen Teile herzustellen, die das zu biegende Rohr aufweisen muss, und um so die gewünschte Leitung herzustellen.
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
FR8219404A FR2536314B1 (fr) 1982-11-19 1982-11-19 Machine a cintrer les tubes
FR8219404 1982-11-19

Publications (2)

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

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EP19830402217 Expired EP0109905B1 (de) 1982-11-19 1983-11-17 Vorrichtung zum Biegen von Rohren

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

Families Citing this family (1)

* 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

Family Cites Families (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
SU466698A1 (ru) * 1972-11-30 1976-08-05 Предприятие П/Я В-2190 Консольна гибочна головка трубогибочного станка
GB1446543A (en) * 1975-03-04 1976-08-18 Shubin V N Pipe bending machine
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

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EP0109905A1 (de) 1984-05-30
DE3372447D1 (en) 1987-08-20
FR2536314B1 (fr) 1985-06-21
FR2536314A1 (fr) 1984-05-25

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