WO2008074698A1 - Device for bending a metallic pipe by winding on a shape roller - Google Patents

Device for bending a metallic pipe by winding on a shape roller Download PDF

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Publication number
WO2008074698A1
WO2008074698A1 PCT/EP2007/063724 EP2007063724W WO2008074698A1 WO 2008074698 A1 WO2008074698 A1 WO 2008074698A1 EP 2007063724 W EP2007063724 W EP 2007063724W WO 2008074698 A1 WO2008074698 A1 WO 2008074698A1
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WO
WIPO (PCT)
Prior art keywords
roller
tube
ring
wrinkle
erase
Prior art date
Application number
PCT/EP2007/063724
Other languages
French (fr)
Inventor
Jérôme CAMUS
Bernard Crapet
Original Assignee
Renault S.A.S.
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 Renault S.A.S. filed Critical Renault S.A.S.
Priority to AT07857411T priority Critical patent/ATE464957T1/en
Priority to DE602007006057T priority patent/DE602007006057D1/en
Priority to EP07857411A priority patent/EP2106306B1/en
Publication of WO2008074698A1 publication Critical patent/WO2008074698A1/en

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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
    • 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 present invention relates to a device for bending a metal tube by winding on a shaped roller.
  • the device according to the invention is particularly applicable to the bending of metal exhaust pipes for motor vehicles.
  • the device comprises a shaped roller 1 to obtain the desired bending radius comprising a peripheral groove adapted to receive the tube 2, a mandrel 3 adapted to be introduced into the tube to be bent 2, a cooperating eraser 4 with the tube to be bent and the shape of the roller 1 to prevent the formation of folds on the intrados of the bent portion of the tube 2, means for putting the tube 2 in abutment against the shape of the roller 1 and the wrinkle-erase 4 and means for winding the tube 2 on the shaped roller 1 according to the desired bending angle.
  • the mandrel 3 serves to prevent flattening of the tube 2 during bending.
  • the means for pressing the tube 2 against the roller 1 comprises a clamping shoe 5 engageable with the tube 2 and resting on a form insert 6 integral in rotation with the roller 1.
  • the roller 1 has been rotated about its axis by driving with it, the shaped insert 6 and the clamping shoe 5 thus realizing the bending of the tube 2 around the roller 1.
  • the erase -plis 4 prevents the formation of creases on the intrados of the bent part of the tube
  • the above bending device makes it possible to obtain excellent tube bending quality.
  • the wrinkle-remover avoids the formation of folds on the intrados of the bent part of the tubes.
  • a device for bending a metal tube by winding comprising a shaped roller to obtain the desired bending radius having a peripheral groove adapted to receive the tube, a mandrel adapted to be introduced into the bending tube, a fold erase cooperating with the tube to be bent and the shape roller to prevent the formation of folds on the intrados of the bent part of the tube, means for putting the tube in abutment against the shape roller and the wrinkle-wiper and means for winding the tube on the shaped roller according to the desired bending angle, characterized in that the shaped roller comprises a ring housed concentrically in the roller, in free rotation relative to the ci, this ring being located at the bottom of the peripheral groove of the roller and one end of the erase-folds bearing on the outer surface of said ring.
  • the wrinkle-erase is supported on a ring which is itself mounted free to rotate relative to the roller, so that, when the rotation of the roller, the ring remains motionless and there is no friction between it and the wrinkle-wrinkle.
  • the roller is in two parts axially connected to one another, the ring being located between these two roller parts.
  • This two-part arrangement of the roller allows easy mounting of the ring.
  • the inner face of a first roller portion has an annular shoulder on which the ring is freely engaged, the second roller portion having a flat inner face bearing against a flat surface of the first roller portion.
  • the above shoulder of one of the roller parts serves as a seat for the roller and this seat can rotate freely relative to the ring.
  • the ring can thus remain motionless with respect to the wrinkle-erase resting on it.
  • the two roller parts are made integral in rotation by means of a key and tightened against each other by means of screws.
  • the wrinkle erase is a rectilinear bar-shaped part, one end of which bears tangentially on the ring and the opposite end of which is removably attached to a wrinkle-erase support. This piece is thus easy to machine and replace.
  • the wrinkle eraser has a flat face intended to bear on the ring and an opposite curved face adapted to the curvature of the tube to be bent.
  • the wrinkle-wiper has a curved face intended to bear on an outer surface of complementary shape of the ring and an opposite curved face of the same shape as the first face adapted to the curvature of the tube to be bent.
  • the wrinkle erase can be obtained by cutting a tube along the generatrices thereof.
  • the peripheral profile of the two roller parts defining the receiving groove of the tube to be bent has two plane annular surfaces having different inclination angles and connected to each other by an annular recess.
  • each roller portion has on its periphery a notch for receiving a shaped insert having a receiving groove of the tube extending tangentially to that of the roller, said notch comprising a guide slide of the shape insert extending perpendicularly to the axis of the roller.
  • FIGS. 1 to 6 are diagrammatic side elevational views of a known tube bending device, showing the various operating steps of this device
  • FIGS. 8 and 9 are perspective views showing the roller assembly, wrinkle erase and shape insert of a bending device according to the invention
  • FIG. 10 is a schematic view in radial section of a tube, of the two parts of the roller, a wrinkle-erase and the ring of the device according to the invention
  • FIG. 11 is a sectional view of a wrinkle-erase
  • FIG. 12 is a sectional view of an embodiment variant.
  • FIG. 13 is a sectional view illustrating an economical method of manufacturing the wrinkle erase shown in FIG. 12
  • FIG. 14 is a fragmentary radial sectional view of a modified roller part.
  • - Figure 15 is a perspective view of a portion of pebble c omportant another feature of the invention.
  • FIGS 7, 8, 9 and 10 illustrate the essential features of the invention.
  • the shaped roller 1 comprises a ring 7 housed concentrically in the roller 1, in free rotation relative thereto.
  • This ring 7 is located at the back of the throat 8 (see Figure 10) of the roller 1 and one end of the wrinkle-erase 9 bears on the outer surface of the ring 7.
  • roller 1 is in two parts la, Ib axially connected to one another, the ring 7 being located between these two roller parts la, Ib.
  • FIG. 10 further shows that the inner face of a first roller portion 1a has an annular shoulder Ic on which the ring 7 is freely engaged, the second roller portion Ib having a flat inner face Id resting against a flat surface of the first part of the roller.
  • the two roller parts la, Ib are secured in rotation by means of a key (not shown) and tightened against each other by means of screws.
  • FIGS. 7 to 9 show that the wrinkle erase 9 is a rectilinear bar-shaped piece, one end of which bears tangentially on the ring 7 and the opposite end of which is removably attached to an erase support 10 -plis.
  • the wrinkle erase 9 has a flat face 9a for bearing on the ring 7 and an opposite curved face 9b adapted to the curvature of the tube 2 to be bent.
  • the wrinkle-erase has a curved face 9c intended to bear on an outer surface of complementary shape of the ring 7 and an opposite face.
  • Curved 9d of the same shape as the first face 9c adapted to the curvature of the tube 2 to be bent.
  • the wrinkle wrinkle shown in Figure 12 can be obtained by cutting a tube January 1 generators 12 thereof, as shown in Figure 13, which reduces the manufacturing costs.
  • the groove 8 defined by the two roller parts la, Ib intended to receive the tube 2 may have a toroidal profile adapted to the diameter of the tube.
  • FIG. 14 shows a roller portion Ib whose peripheral profile defining a part of the groove, has two planar annular surfaces 8a, 8b having different angles of inclination and connected to each other by an annular recess 8c.
  • a throat profile is more economical to machine than a toric profile.
  • FIG. 15 shows that each roller portion such as Ib has on its periphery a notch 13 for receiving an insert of shape 6 (see FIGS. 7 to 9) having a groove 14 for receiving the tube 2 extending tangentially to that of the roller 1.
  • said notch 13 includes a slide 15 for guiding the shaped insert 6 extending perpendicular to the axis of the roller 1. This slide 15 makes it possible to guide the tube 2 engaged in the groove of the insert 6 in the axis of the roller 1 while pinching the two roller parts la, Ib one against the other.
  • FIGS. 7, 8, 9 and 10 The main advantages of the invention are illustrated by FIGS. 7, 8, 9 and 10.
  • the wear of the wrinkle eraser 9 is thus considerably reduced.
  • the wrinkle erase 9 can be used during a very large number of pipe bending operations before being replaced.
  • the device that has just been described is particularly well suited to the bending of automobile exhaust pipes.
  • this device can of course also apply to the bending of steel or other metal tubes in other applications than the automobile.

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

Abstract

The invention relates to a device for bending a metallic pipe by winding on a shape roller (1), comprising a mandrel adapted to be introduced in the pipe and a spreader (9) for avoiding the formation of folds on the lower surface of the pipe. The shape roller (1) includes a ring (7) concentrically fitted in the roller (1) and capable of free rotation relative thereto, said ring (7) being provided at the bottom of the peripheral groove (8) of the roller (1) while one end of the spreader (9) rests on the outer surface of said ring (7).

Description

Dispositif pour cintrer un tube métallique par enroulement sur un galet de forme. Device for bending a metal tube by winding on a shaped roller.
La présente invention concerne un dispositif pour cintrer un tube métallique par enroulement sur un galet de forme. Le dispositif selon l'invention s'applique notamment au cintrage de tubes métalliques d'échappement pour véhicules automobiles.The present invention relates to a device for bending a metal tube by winding on a shaped roller. The device according to the invention is particularly applicable to the bending of metal exhaust pipes for motor vehicles.
Des dispositifs de cintrage de ce type ont été décrits notamment dans les brevets US 6309588, EP 0484155 et FR 2382997.Bending devices of this type have been described in particular in patents US 6309588, EP 0484155 and FR 2382997.
Actuellement, la demanderesse réalise le cintrage des tubes pour lignes d'échappement à l'aide du dispositif représenté sur la figure 1.Currently, the Applicant is bending the tubes for exhaust lines using the device shown in Figure 1.
Sur cette figure, le dispositif comprend un galet de forme 1 pour obtenir le rayon de cintrage désiré comportant une gorge périphérique adaptée pour recevoir le tube 2, un mandrin 3 adapté pour être introduit dans le tube à cintrer 2, un efface-plis 4 coopérant avec le tube à cintrer et le galet de forme 1 pour éviter la formation de plis sur l'intrados de la partie cintrée du tube 2, des moyens pour mettre le tube 2 en appui contre le galet de forme 1 et l'efface-plis 4 et des moyens pour enrouler le tube 2 sur le galet de forme 1 suivant l'angle de cintrage désiré. Le mandrin 3 sert à éviter l'aplatissement du tube 2 lors du cintrage.In this figure, the device comprises a shaped roller 1 to obtain the desired bending radius comprising a peripheral groove adapted to receive the tube 2, a mandrel 3 adapted to be introduced into the tube to be bent 2, a cooperating eraser 4 with the tube to be bent and the shape of the roller 1 to prevent the formation of folds on the intrados of the bent portion of the tube 2, means for putting the tube 2 in abutment against the shape of the roller 1 and the wrinkle-erase 4 and means for winding the tube 2 on the shaped roller 1 according to the desired bending angle. The mandrel 3 serves to prevent flattening of the tube 2 during bending.
Dans l'exemple représenté, les moyens pour mettre en appui le tube 2 contre le galet 1 comprennent un sabot de serrage 5 pouvant venir en prise sous le tube 2 et prendre appui sur un insert de forme 6 solidaire en rotation avec le galet 1.In the example shown, the means for pressing the tube 2 against the roller 1 comprises a clamping shoe 5 engageable with the tube 2 and resting on a form insert 6 integral in rotation with the roller 1.
Dans la position représentée sur la figure 1 , le dispositif de cintrage est au repos, le tube 2 est en position sous le galet 1 et l'insert de forme 6 et le mandrin 3 est engagé dans le tube 2. Le sabot de serrage 5 est écarté du tube 2 et de l'insert de forme 6. Dans la position de la figure 2, le mandrin 3 a été poussé en avant et le sabot de serrage 5 est en appui contre le tube 2 et l'insert de forme 6.In the position shown in Figure 1, the bending device is at rest, the tube 2 is in position under the roller 1 and the shaped insert 6 and the mandrel 3 is engaged in the tube 2. The clamping shoe 5 is spaced from the tube 2 and the shaped insert 6. In the position of Figure 2, the mandrel 3 has been pushed forward and the clamping shoe 5 bears against the tube 2 and the shaped insert 6 .
Sur la figure 3, le galet 1 a été mis en rotation autour de son axe en entraînant avec lui, l'insert de forme 6 et le sabot de serrage 5 en réalisant ainsi le cintrage du tube 2 autour du galet 1. L'efface-plis 4 empêche la formation de plis sur l'intrados de la partie cintrée du tubeIn FIG. 3, the roller 1 has been rotated about its axis by driving with it, the shaped insert 6 and the clamping shoe 5 thus realizing the bending of the tube 2 around the roller 1. The erase -plis 4 prevents the formation of creases on the intrados of the bent part of the tube
2. Sur la figure 4, le mandrin 3 a reculé vers la position de repos. Sur la figure 5, le sabot de serrage 5 s'est partiellement écarté de l'insert de forme 6 et sur la figure 6 le sabot de serrage 5 et l'insert 6 se sont complètement écartés et un nouveau tube 2 a été mis en place. Dans la description ci-dessus des figures 1 à 6, on s'est contenté de décrire les éléments essentiels pour la compréhension de l'invention qui sera décrite plus loin.2. In Figure 4, the mandrel 3 has moved back to the rest position. In FIG. 5, the clamping shoe 5 has partially moved away from the shaped insert 6 and in FIG. 6 the clamping shoe 5 and the insert 6 have completely moved apart and a new tube 2 has been placed in position. square. In the above description of Figures 1 to 6, it was sufficient to describe the essential elements for understanding the invention to be described later.
Le dispositif de cintrage ci-dessus permet d'obtenir une excellente qualité de cintrage des tubes. En particulier, l'efface-plis permet d'éviter la formation de plis sur l'intrados de la partie cintrée des tubes.The above bending device makes it possible to obtain excellent tube bending quality. In particular, the wrinkle-remover avoids the formation of folds on the intrados of the bent part of the tubes.
Cependant, les cadences élevées de production exigées dans la fabrication des automobiles engendrent une usure rapide des pièces et en particulier celle de l'efface-plis en raison d'un frottement de celui-ci avec le galet de forme.However, the high production rates required in the manufacture of automobiles cause rapid wear of the parts and in particular that of the wrinkle wrinkle due to friction of the latter with the form roller.
Ainsi, on est obligé de remplacer fréquemment l'efface-plis par une pièce neuve, ce qui entraîne des coûts élevés, d'autant plus que cette pièce est en alliage de cuivre dont le coût est lui-même relativement élevé. Le but de la présente invention est notamment de remédier à cet inconvénient.Thus, it is necessary to frequently replace the wrinkle-wrinkle with a new part, which entails high costs, especially since this piece is copper alloy whose cost is itself relatively high. The object of the present invention is in particular to remedy this drawback.
Ce but est atteint selon l'invention, grâce à un dispositif pour cintrer un tube métallique par enroulement comprenant un galet de forme pour obtenir le rayon de cintrage désiré comportant une gorge périphérique adaptée pour recevoir le tube, un mandrin adapté pour être introduit dans le tube à cintrer, un efface-plis coopérant avec le tube à cintrer et le galet de forme pour éviter la formation de plis sur l'intrados de la partie cintrée du tube, des moyens pour mettre le tube en appui contre le galet de forme et l'efface-plis et des moyens pour enrouler le tube sur le galet de forme suivant l'angle de cintrage désiré, caractérisé en ce que le galet de forme comporte une bague logée concentriquement dans le galet, en rotation libre par rapport à celui-ci, cette bague étant située au fond de la gorge périphérique du galet et une extrémité de l'efface-plis prenant appui sur la surface extérieure de ladite bague.This object is achieved according to the invention, thanks to a device for bending a metal tube by winding comprising a shaped roller to obtain the desired bending radius having a peripheral groove adapted to receive the tube, a mandrel adapted to be introduced into the bending tube, a fold erase cooperating with the tube to be bent and the shape roller to prevent the formation of folds on the intrados of the bent part of the tube, means for putting the tube in abutment against the shape roller and the wrinkle-wiper and means for winding the tube on the shaped roller according to the desired bending angle, characterized in that the shaped roller comprises a ring housed concentrically in the roller, in free rotation relative to the ci, this ring being located at the bottom of the peripheral groove of the roller and one end of the erase-folds bearing on the outer surface of said ring.
Ainsi, l'efface-plis est en appui sur une bague qui est elle-même montée libre en rotation par rapport au galet, de sorte que, lors de la rotation du galet, la bague reste immobile et il n'existe pas de frottement entre celle-ci et l'efface-plis.Thus, the wrinkle-erase is supported on a ring which is itself mounted free to rotate relative to the roller, so that, when the rotation of the roller, the ring remains motionless and there is no friction between it and the wrinkle-wrinkle.
On évite ainsi d'avoir à remplacer fréquemment cet efface-plis.This avoids having to frequently replace this wrinkle erase.
Selon une version préférée de l'invention, le galet est en deux parties reliées axialement l'une à l'autre, la bague étant située entre ces deux parties de galet.According to a preferred version of the invention, the roller is in two parts axially connected to one another, the ring being located between these two roller parts.
Cette disposition en deux parties du galet permet un montage facile de la bague.This two-part arrangement of the roller allows easy mounting of the ring.
De préférence, la face intérieure d'une première partie de galet comporte un épaulement annulaire sur lequel la bague est engagée librement, la seconde partie de galet présentant une face intérieure plane en appui contre une surface plane de la première partie de galet.Preferably, the inner face of a first roller portion has an annular shoulder on which the ring is freely engaged, the second roller portion having a flat inner face bearing against a flat surface of the first roller portion.
Autrement dit, l'épaulement ci-dessus de l'une des parties de galet sert de siège pour le galet et ce siège peut tourner librement par rapport à la bague.In other words, the above shoulder of one of the roller parts serves as a seat for the roller and this seat can rotate freely relative to the ring.
La bague peut ainsi rester immobile par rapport à l'efface-plis en appui sur elle.The ring can thus remain motionless with respect to the wrinkle-erase resting on it.
Selon une disposition avantageuse de l'invention, les deux parties de galet sont rendues solidaires en rotation au moyen d'une clavette et serrées l'une contre l'autre au moyen de vis.According to an advantageous arrangement of the invention, the two roller parts are made integral in rotation by means of a key and tightened against each other by means of screws.
De préférence également, l'efface plis est une pièce en forme de barreau rectiligne dont une extrémité s'appuie tangentiellement sur la bague et dont l'extrémité opposée est fixée de façon amovible à un support d'efface-plis. Cette pièce est ainsi simple à usiner et à remplacer.Also preferably, the wrinkle erase is a rectilinear bar-shaped part, one end of which bears tangentially on the ring and the opposite end of which is removably attached to a wrinkle-erase support. This piece is thus easy to machine and replace.
Dans un mode de réalisation, l'efface-plis présente une face plane destinée à prendre appui sur la bague et une face opposée incurvée adaptée à la courbure du tube à cintrer.In one embodiment, the wrinkle eraser has a flat face intended to bear on the ring and an opposite curved face adapted to the curvature of the tube to be bent.
Dans un autre mode de réalisation, l'efface-plis présente une face incurvée destinée à prendre appui sur une surface extérieure de forme complémentaire de la bague et une face opposée incurvée de même forme que la première face adaptée à la courbure du tube à cintrer.In another embodiment, the wrinkle-wiper has a curved face intended to bear on an outer surface of complementary shape of the ring and an opposite curved face of the same shape as the first face adapted to the curvature of the tube to be bent. .
Dans ce mode de réalisation, l'efface-plis peut être obtenu par découpages d'un tube suivant des génératrices de celui-ci. Dans une version avantageuse de l'invention, le profil périphérique des deux parties de galet définissant la gorge de réception du tube à cintrer présente deux surfaces annulaires planes ayant des angles d'inclinaison différents et raccordées l'une à l'autre par un décrochement annulaire.In this embodiment, the wrinkle erase can be obtained by cutting a tube along the generatrices thereof. In an advantageous version of the invention, the peripheral profile of the two roller parts defining the receiving groove of the tube to be bent has two plane annular surfaces having different inclination angles and connected to each other by an annular recess.
Ce mode de réalisation est moins coûteux que l'usinage de forme torique de la gorge périphérique des galets. Selon une autre particularité de l'invention, chaque partie de galet présente sur sa périphérie une encoche pour recevoir un insert de forme présentant une gorge de réception du tube s 'étendant tangentiellement à celle du galet, ladite encoche comportant une glissière de guidage de l'insert de forme s'étendant perpendiculairement à l'axe du galet.This embodiment is less expensive than torus-shaped machining of the peripheral groove of the rollers. According to another feature of the invention, each roller portion has on its periphery a notch for receiving a shaped insert having a receiving groove of the tube extending tangentially to that of the roller, said notch comprising a guide slide of the shape insert extending perpendicularly to the axis of the roller.
D'autres particularités et avantages de l'invention apparaîtront encore tout au long de la description ci-après.Other features and advantages of the invention will become apparent throughout the description below.
Aux dessins annexés, donnés à titre d'exemples, non limitatifs : les figures 1 à 6 sont des vues schématiques en élévation latérale d'un dispositif de cintrage de tubes connu, montrant les différentes étapes de fonctionnement de ce dispositif, les figures 7, 8 et 9 sont des vues en perspective montrant l'ensemble galet, efface-plis et insert de forme d'un dispositif de cintrage selon l'invention, - la figure 10 est une vue schématique en coupe radiale d'un tube, des deux parties de galet, d'un efface-plis et de la bague du dispositif selon l'invention, la figure 11 est une vue en coupe d'un efface-plis, la figure 12 est une vue en coupe d'une variante de réalisation d'un efface-plis, la figure 13 est une vue en coupe illustrant un mode de fabrication économique de l'efface-plis représenté sur la figure 12, la figure 14 est une vue en coupe radiale partielle d'une partie de galet modifié selon l'invention, - la figure 15 est une vue en perspective d'une partie de galet comportant une autre particularité de l'invention.In the accompanying drawings, given by way of nonlimiting example: FIGS. 1 to 6 are diagrammatic side elevational views of a known tube bending device, showing the various operating steps of this device, FIGS. 8 and 9 are perspective views showing the roller assembly, wrinkle erase and shape insert of a bending device according to the invention; FIG. 10 is a schematic view in radial section of a tube, of the two parts of the roller, a wrinkle-erase and the ring of the device according to the invention, FIG. 11 is a sectional view of a wrinkle-erase, FIG. 12 is a sectional view of an embodiment variant. FIG. 13 is a sectional view illustrating an economical method of manufacturing the wrinkle erase shown in FIG. 12, FIG. 14 is a fragmentary radial sectional view of a modified roller part. according to the invention, - Figure 15 is a perspective view of a portion of pebble c omportant another feature of the invention.
Les figures 7, 8, 9 et 10 illustrent les caractéristiques essentielles de l'invention.Figures 7, 8, 9 and 10 illustrate the essential features of the invention.
Conformément à l'invention, le galet de forme 1 comporte une bague 7 logée concentriquement dans le galet 1, en rotation libre par rapport à celui-ci. Cette bague 7 est située au fond de la gorge périphérique 8 (voir figure 10) du galet 1 et une extrémité de l'efface-plis 9 prend appui sur la surface extérieure de la bague 7.According to the invention, the shaped roller 1 comprises a ring 7 housed concentrically in the roller 1, in free rotation relative thereto. This ring 7 is located at the back of the throat 8 (see Figure 10) of the roller 1 and one end of the wrinkle-erase 9 bears on the outer surface of the ring 7.
Par ailleurs, le galet 1 est en deux parties la, Ib reliées axialement l'une à l'autre, la bague 7 étant située entre ces deux parties de galet la, Ib.Furthermore, the roller 1 is in two parts la, Ib axially connected to one another, the ring 7 being located between these two roller parts la, Ib.
La figure 10, montre en outre, que la face intérieure d'une première partie la de galet comporte un épaulement annulaire Ic sur lequel la bague 7 est engagée librement, la seconde partie de galet Ib présentant une face intérieure plane Id en appui contre une surface plane de la première partie de galet la.FIG. 10 further shows that the inner face of a first roller portion 1a has an annular shoulder Ic on which the ring 7 is freely engaged, the second roller portion Ib having a flat inner face Id resting against a flat surface of the first part of the roller.
Les deux parties de galet la, Ib sont rendues solidaires en rotation au moyen d'une clavette (non représentée) et serrées l'une contre l'autre au moyen de vis.The two roller parts la, Ib are secured in rotation by means of a key (not shown) and tightened against each other by means of screws.
Les figures 7 à 9 montrent que l'efface-plis 9 est une pièce en forme de barreau rectiligne dont une extrémité s'appuie tangentiellement sur la bague 7 et dont l'extrémité opposée est fixée de façon amovible à un support 10 d'efface-plis.FIGS. 7 to 9 show that the wrinkle erase 9 is a rectilinear bar-shaped piece, one end of which bears tangentially on the ring 7 and the opposite end of which is removably attached to an erase support 10 -plis.
Dans l'exemple représenté sur les figures 10 et 1 1 l'efface-plis 9 présente une face plane 9a destinée à prendre appui sur la bague 7 et une face opposée 9b incurvée adaptée à la courbure du tube 2 à cintrer.In the example shown in Figures 10 and 1 1 the wrinkle erase 9 has a flat face 9a for bearing on the ring 7 and an opposite curved face 9b adapted to the curvature of the tube 2 to be bent.
Dans la variante représentée sur la figure 12 l'efface-plis présente une face incurvée 9c destinée à prendre appui sur une surface extérieure de forme complémentaire de la bague 7 et une face opposéeIn the variant shown in FIG. 12, the wrinkle-erase has a curved face 9c intended to bear on an outer surface of complementary shape of the ring 7 and an opposite face.
9d incurvée de même forme que la première face 9c adaptée à la courbure du tube 2 à cintrer.Curved 9d of the same shape as the first face 9c adapted to the curvature of the tube 2 to be bent.
L'efface-plis représenté sur la figure 12 peut être obtenu par découpages d'un tube 1 1 suivant des génératrices 12 de celui-ci, comme montré par la figure 13, ce qui permet de réduire les coûts de fabrication. La gorge 8 définie par les deux parties de galet la, Ib destinée à recevoir le tube 2 peut présenter un profil torique adapté au diamètre du tube.The wrinkle wrinkle shown in Figure 12 can be obtained by cutting a tube January 1 generators 12 thereof, as shown in Figure 13, which reduces the manufacturing costs. The groove 8 defined by the two roller parts la, Ib intended to receive the tube 2 may have a toroidal profile adapted to the diameter of the tube.
La figure 14 montre une partie de galet Ib dont le profil périphérique définissant une partie de la gorge, présente deux surface annulaires planes 8a, 8b ayant des angles d'inclinaison différents et raccordées l'une à l'autre par un décrochement annulaire 8c. Un tel profil de gorge est plus économique à usiner qu'un profil torique. La figure 15 montre que chaque partie de galet telle que Ib présente sur sa périphérie une encoche 13 pour recevoir un insert de forme 6 (voir figures 7 à 9) présentant une gorge 14 de réception du tube 2 s 'étendant tangentiellement à celle du galet 1. Dans l'exemple montré sur la figure 15 ladite encoche 13 comporte une glissière 15 de guidage de l'insert de forme 6 s'étendant perpendiculairement à l'axe du galet 1. Cette glissière 15 permet de guider le tube 2 engagé dans la gorge de l'insert 6 dans l'axe du galet 1 tout en pinçant les deux parties de galet la, Ib l'une contre l'autre. Les principaux avantages de l'invention sont illustrés par les figures 7, 8, 9 et 10.FIG. 14 shows a roller portion Ib whose peripheral profile defining a part of the groove, has two planar annular surfaces 8a, 8b having different angles of inclination and connected to each other by an annular recess 8c. Such a throat profile is more economical to machine than a toric profile. FIG. 15 shows that each roller portion such as Ib has on its periphery a notch 13 for receiving an insert of shape 6 (see FIGS. 7 to 9) having a groove 14 for receiving the tube 2 extending tangentially to that of the roller 1. In the example shown in FIG. 15, said notch 13 includes a slide 15 for guiding the shaped insert 6 extending perpendicular to the axis of the roller 1. This slide 15 makes it possible to guide the tube 2 engaged in the groove of the insert 6 in the axis of the roller 1 while pinching the two roller parts la, Ib one against the other. The main advantages of the invention are illustrated by FIGS. 7, 8, 9 and 10.
Lors de la rotation du galet 1 , l'extrémité de l'efface-plis 9 est en appui sur la bague 7. Etant donné que cette bague 7 est montée en rotation libre sur l'épaulement annulaire Ic de la partie la du galet, lors de la rotation de cette dernière, la bague 7 reste immobile, de sorte qu'aucun frottement n'a lieu entre l'efface-plis 9 et la bague 7.When the roller 1 is rotated, the end of the wrinkle eraser 9 bears against the ring 7. Since this ring 7 is mounted in free rotation on the annular shoulder Ic of the part 1a of the roller, during the rotation of the latter, the ring 7 remains stationary, so that no friction takes place between the wrinkle-erase 9 and the ring 7.
L'usure de l'efface-plis 9 est ainsi considérablement réduite. De ce fait, l'efface-plis 9 peut être utilisé pendant un très grand nombre d'opérations de cintrage de tubes avant d'être remplacé. Le dispositif que l'on vient de décrire est particulièrement bien adapté au cintrage de tubes d'échappement d'automobiles.The wear of the wrinkle eraser 9 is thus considerably reduced. As a result, the wrinkle erase 9 can be used during a very large number of pipe bending operations before being replaced. The device that has just been described is particularly well suited to the bending of automobile exhaust pipes.
Cependant, ce dispositif peut bien entendu également s'appliquer au cintrage de tubes métalliques en acier ou autres dans d'autres applications que l'automobile. However, this device can of course also apply to the bending of steel or other metal tubes in other applications than the automobile.

Claims

REVENDICATIONS
1. Dispositif pour cintrer un tube métallique (2) par enroulement, comprenant un galet de forme ( 1 ) pour obtenir le rayon de cintrage désiré comportant une gorge périphérique adaptée pour recevoir le tube (2), un mandrin (3) adapté pour être introduit dans le tube à cintrer (2), un efface-plis (4, 9) coopérant avec le tube à cintrer (2) et le galet de forme (1) pour éviter la formation de plis sur l'intrados de la partie cintrée du tube (2), des moyens pour mettre le tube (2) en appui contre le galet de forme (1) et l'efface-plis (4, 9) et des moyens pour enrouler le tube sur le galet de forme (1) suivant l'angle de cintrage désiré, caractérisé en ce que le galet de forme (1) comporte une bague (7) logée concentriquement dans le galet (1), en rotation libre par rapport à celui-ci, cette bague (7) étant située au fond de la gorge périphérique (8) du galet (1) et une extrémité de l'efface-plis (9) prenant appui sur la surface extérieure de ladite bague (7).1. Device for bending a metal tube (2) by winding, comprising a shaped roller (1) to obtain the desired bending radius having a peripheral groove adapted to receive the tube (2), a mandrel (3) adapted to be introduced into the tube to be bent (2), a wrinkle eraser (4, 9) cooperating with the tube to be bent (2) and the shaped roller (1) to prevent the formation of folds on the intrados of the arched part of the tube (2), means for putting the tube (2) in abutment against the shaped roller (1) and the wrinkle-erase (4, 9) and means for winding the tube on the shape roller (1 ) according to the desired bending angle, characterized in that the shaped roller (1) comprises a ring (7) concentrically housed in the roller (1), in free rotation with respect thereto, this ring (7) being located at the bottom of the peripheral groove (8) of the roller (1) and one end of the wrinkle-erase (9) bearing on the outer surface of said ring (7).
2. Dispositif selon la revendication 1 , caractérisé en ce que le galet (1) est en deux parties (la, Ib) reliées axialement l'une à l'autre, la bague (7) étant située entre ces deux parties de galet (la, Ib).2. Device according to claim 1, characterized in that the roller (1) is in two parts (la, Ib) axially connected to one another, the ring (7) being located between these two parts of roller ( la, Ib).
3. Dispositif selon la revendication 1 , caractérisé en ce que la face intérieure d'une première partie de galet (la) comporte un épaulement annulaire (Ic) sur lequel la bague (7) est engagée librement, la seconde partie de galet (Ib) présentant une face intérieure plane en appui contre une surface plane de la première partie de galet (la).3. Device according to claim 1, characterized in that the inner face of a first roller portion (la) comprises an annular shoulder (Ic) on which the ring (7) is freely engaged, the second roller portion (Ib). ) having a planar inner face bearing against a flat surface of the first roller portion (la).
4. Dispositif selon la revendication 3, caractérisé en ce que les deux parties de galet (la, Ib) sont rendues solidaires en rotation au moyen d'une clavette et serrées l'une contre l'autre au moyen de vis.4. Device according to claim 3, characterized in that the two roller parts (la, Ib) are secured in rotation by means of a key and tightened against each other by means of screws.
5. Dispositif selon l'une des revendications 1 à 4, caractérisé en ce que l'efface-plis (9) est une pièce en forme de barreau rectiligne dont une extrémité s'appuie tangentiellement sur la bague (7) et dont l'extrémité opposée est fixée de façon amovible à un support d'efface- plis (10).5. Device according to one of claims 1 to 4, characterized in that the wrinkle-erase (9) is a rectilinear bar-shaped piece whose end is supported tangentially on the ring (7) and whose opposite end is removably attached to an erasing support (10).
6. Dispositif selon la revendication 5, caractérisé en ce que l'efface-plis (9) présente une face plane (9a) destinée à prendre appui sur la bague (7) et une face opposée incurvée (9b) adaptée à la courbure du tube à cintrer (2).6. Device according to claim 5, characterized in that the wrinkle-erase (9) has a flat face (9a) intended to bear on the ring (7) and an opposite curved face (9b) adapted to the curvature of the bending tube (2).
7. Dispositif selon la revendication 5, caractérisé en ce que l'efface-plis présente une face incurvée (9c) destinée à prendre appui sur une surface extérieure de forme complémentaire de la bague (7) et une face opposée incurvée (9d) de même forme que la première face adaptée à la courbure du tube à cintrer.7. Device according to claim 5, characterized in that the wrinkle-erase has a curved face (9c) intended to bear on an outer surface of complementary shape of the ring (7) and an opposite curved face (9d) of the same shape as the first face adapted to the curvature of the tube to be bent.
8. Dispositif selon la revendication 7, caractérisé en ce que l'efface-plis est obtenu par découpages d'un tube (11) suivant des génératrices (12) de celui-ci.8. Device according to claim 7, characterized in that the wrinkle erase is obtained by cutting a tube (11) along the generatrices (12) thereof.
9. Dispositif selon l'une des revendications 2 à 8, caractérisé en ce que le profil périphérique des deux parties de galet (la, Ib) définissant la gorge de réception du tube à cintrer (2) présente deux surfaces annulaires planes (8a, 8b) ayant des angles d'inclinaison différents et raccordées l'une à l'autre par un décrochement annulaire (8c).9. Device according to one of claims 2 to 8, characterized in that the peripheral profile of the two roller parts (la, Ib) defining the receiving groove of the tube to be bent (2) has two planar annular surfaces (8a, 8b) having different angles of inclination and connected to each other by an annular recess (8c).
10. Dispositif selon l'une des revendications 2 à 9, caractérisé en ce que chaque partie de galet (la, Ib) présente sur sa périphérie une encoche (13) pour recevoir un insert de forme (6) présentant une gorge10. Device according to one of claims 2 to 9, characterized in that each roller portion (la, Ib) has on its periphery a notch (13) for receiving a shaped insert (6) having a groove
(14) de réception du tube (2) s 'étendant tangentiellement à celle du galet, ladite encoche (13) comportant une glissière de guidage (15) de l'insert de forme (6) s'étendant perpendiculairement à l'axe du galet. (14) for receiving the tube (2) extending tangentially to that of the roller, said notch (13) comprising a guide rail (15) of the shaped insert (6) extending perpendicular to the axis of the roller.
PCT/EP2007/063724 2006-12-19 2007-12-11 Device for bending a metallic pipe by winding on a shape roller WO2008074698A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AT07857411T ATE464957T1 (en) 2006-12-19 2007-12-11 DEVICE FOR BENDING A METAL TUBE BY WINDING IT ON A FORM ROLL
DE602007006057T DE602007006057D1 (en) 2006-12-19 2007-12-11 DEVICE FOR BENDING A METAL TUBE BY WRAPPING ON A FORM ROLL
EP07857411A EP2106306B1 (en) 2006-12-19 2007-12-11 Device for bending a metallic pipe by winding on a shape roller

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0611062 2006-12-19
FR0611062A FR2909910B1 (en) 2006-12-19 2006-12-19 DEVICE FOR BENDING A METALLIC TUBE BY WINDING ON A SHAPE ROD.

Publications (1)

Publication Number Publication Date
WO2008074698A1 true WO2008074698A1 (en) 2008-06-26

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PCT/EP2007/063724 WO2008074698A1 (en) 2006-12-19 2007-12-11 Device for bending a metallic pipe by winding on a shape roller

Country Status (6)

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EP (1) EP2106306B1 (en)
AT (1) ATE464957T1 (en)
DE (1) DE602007006057D1 (en)
ES (1) ES2340440T3 (en)
FR (1) FR2909910B1 (en)
WO (1) WO2008074698A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105382064A (en) * 2015-12-04 2016-03-09 重庆长安空港汽车配件有限责任公司 Pipe bending machine and combined wrinkle-proof plate thereof
IT201800010409A1 (en) * 2018-11-16 2020-05-16 Cml Int S P A Machine for bending an elongated piece without creasing
CN113926951A (en) * 2021-10-20 2022-01-14 中国建筑第二工程局有限公司 Reinforcing steel bar bending device for interpenetration of prefabricated column and cast-in-situ beam slab

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08192229A (en) * 1995-01-13 1996-07-30 Opton Co Ltd Bending device
US20040011106A1 (en) * 2002-03-15 2004-01-22 Calsonic Kansei Corporation Pipe bending processing apparatus and pipe bending processing method
US20040069040A1 (en) * 2002-10-10 2004-04-15 Kazuhiko Nakazato Bending method and mandrel of multi-layered pipe
EP1389149B1 (en) * 2001-05-22 2005-05-25 Peter SCHÜLE Tool for a bending machine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08192229A (en) * 1995-01-13 1996-07-30 Opton Co Ltd Bending device
EP1389149B1 (en) * 2001-05-22 2005-05-25 Peter SCHÜLE Tool for a bending machine
US20040011106A1 (en) * 2002-03-15 2004-01-22 Calsonic Kansei Corporation Pipe bending processing apparatus and pipe bending processing method
US20040069040A1 (en) * 2002-10-10 2004-04-15 Kazuhiko Nakazato Bending method and mandrel of multi-layered pipe

Also Published As

Publication number Publication date
ATE464957T1 (en) 2010-05-15
FR2909910B1 (en) 2009-01-30
EP2106306A1 (en) 2009-10-07
EP2106306B1 (en) 2010-04-21
DE602007006057D1 (en) 2010-06-02
ES2340440T3 (en) 2010-06-02
FR2909910A1 (en) 2008-06-20

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