EP0041432B1 - Apparatus for deforming tubes - Google Patents

Apparatus for deforming tubes Download PDF

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Publication number
EP0041432B1
EP0041432B1 EP19810400805 EP81400805A EP0041432B1 EP 0041432 B1 EP0041432 B1 EP 0041432B1 EP 19810400805 EP19810400805 EP 19810400805 EP 81400805 A EP81400805 A EP 81400805A EP 0041432 B1 EP0041432 B1 EP 0041432B1
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EP
European Patent Office
Prior art keywords
support
shaping
rod
tube
rigid
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.)
Expired
Application number
EP19810400805
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German (de)
French (fr)
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EP0041432A1 (en
Inventor
Eugène Gateau
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.)
NOUVELLE DES CINTREUSES MINGORI Ste
Original Assignee
Nouvelle Des Cintreuses Mingori Ste
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Publication of EP0041432A1 publication Critical patent/EP0041432A1/en
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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
    • B21D7/06—Bending rods, profiles, or tubes in press brakes or between rams and anvils or abutments; Pliers with forming dies
    • B21D7/063—Pliers with forming dies
    • 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
    • B21D41/00—Application of procedures in order to alter the diameter of tube ends
    • B21D41/02—Enlarging
    • B21D41/021—Enlarging by means of tube-flaring hand tools
    • 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 generally to the work of forming metal tubes, in particular copper tubes, and it relates more particularly to an improved bending machine adapted to perform. kill different operations of forming copper tubes on site.
  • the assemblers must also carry out on-site work of shaping the ends of the tubes, whether bent or not, to form sockets, collars or openings in a known manner.
  • this device is not intended to be used as a mobile workstation on a construction site.
  • the invention aims to remedy these difficulties while making a machine for shaping tubes, in particular copper and allowing to bend tubes of 8/10 mm with a radius less than 5D without any defect while simultaneously performing an operation for shaping one end of a tube, for example the formation of a socket or a swell.
  • the subject of the invention is to this end a device for shaping tubes, in particular thin-walled copper tubes, usable on site, of the type comprising a support piece, a rotary shape driven by means of a pinion and a rack integral with the piston rod of a double-acting hydraulic cylinder for bending the tube, characterized in that it comprises: means for shaping socket on a tube, a single member for simultaneously actuating said tubes socket shaping means and said rotary shape, means for slidingly mounting said actuating member, and means for connecting with the piston of the jack.
  • the apparatus comprises a hollow body 20 of elongated shape at one end of which is fixed a block 21, and a connecting member constituted by a yoke 2 fixed at its opposite end.
  • An axial bore 22 extends through the body 20 through the yoke 2 and the block 21.
  • a rod 4 is slidably mounted in the bore 22 and comprises at one end a connecting member 23 whose role will be described in the following and at its opposite end a punch 13 of the type used with the matrices of sockets for forming on the ends of the tube collars, expanses or other types of sockets by means of a matrix in a conventional manner.
  • the rod 4 further comprises between its ends a machined intermediate portion 24 extending longitudinally in which a rack having teeth 25 is formed by machining.
  • the removable punch 13 projects from the bore 22 on the block 21, while the connecting member 23 projects at the opposite end of the body 20 through the yoke 2.
  • a support 10 for the socket matrix is fixed around the orifice of the bore 22 on the block 21 and this support 10 comprises a lower branch 26 and an upper branch 27, the lower branch comprising two pins 28 projecting towards the top and the upper branch comprising a clamping screw 12, the pins 28 and the screw 12 being adapted to fix and retain between the branches 26 and 27 a conventional socket matrix 11 in two parts, the pins 28 being adapted to adjust in the holes provided in the lower part of the matrix 11, while the stop screw 12 makes it possible to tighten the two parts of the matrix.
  • a boss 29 is formed on the upper wall of the block 21 and carries a vertical axis, one end 5 of which projects upwards, this axis comprising a pinion 30 at its lower end and a head 31 at its upper end, projecting above the boss 29.
  • a slide 6 is fixed between the boss 29 and the yoke 2 so as to be spaced above the body 20 and a slide 7 constituting a counterform support is slidably mounted on the slide 6.
  • a threaded rod 14 is screwed into a support 32 secured to the upper edge of the yoke 2 and its end pivots in the slide 7 in which it is retained so as to be able to rotate freely, the rod 14 comprising a knurled button 33 at its end opposite to the slide 7.
  • the slide 7 has a groove 34 in which a counterform 8 is arranged by means of a removable pin 35 which can be adapted in holes, vertically in the slide 7.
  • the counterform 8 is constituted by a block having a vertical hole 36 adapted to receive the axis 35 and a curved groove 37 of semi-circular section, which is a segment of a circle.
  • a shape 9 of the conventional semi-circular type comprising a groove 38 in its curved peripheral part comprises means complementary to those of the head 31 of the axis 5 enabling it to be made to rotate with the latter. It is understood of course that the arrangement is such that the groove 38 of the form 9 and the groove 37 of the counterform 8 are located opposite one another, their axes being contained in the same plane.
  • the lateral wings of the yoke 2 comprise means such as holes 3 adapted to cooperate with complementary means of an actuating cylinder 1 which, in this example, is a double-acting hydraulic cylinder. It is understood of course that the invention is not limited to the use of a hydraulic cylinder but that one can adapt to the yoke 2 a cylinder, for example mechanical or any other suitable motor means.
  • the jack 1 has an actuating lever 39 and the piston rod (not shown) of the jack is connected to the rod 4 by means of the connecting member 23 which, in this example, is shown in the form of 'a threaded end which can cooperate with a threaded element integral with the piston rod of the jack.
  • the counterform 8 is mounted in the support slide 7 so as to be able to pivot around the vertical axis 35 with a certain clearance which allows it to freely take the desired position to perfectly match the curvature of the tube defined by the form 9.
  • the punch 13 projects through the orifice of the bore 22 between the upper and lower branches of the matrix support 10.
  • the operator mounts the matrix 11 1 in its support with one of the ends of the tube which it has just bent between the parts of the matrix, by fixing an appropriate punch 13 at the end of the rod 4 and it can simultaneously carry out a new bending operation of a second tube while simultaneously forming the desired socket in one of the ends of the previously bent tube.
  • the jack must be double-acting in order to allow to exert the force necessary to withdraw the punch 13 from the socket formed in the tube retained by the matrix.
  • the stroke of the punch 13 to perform a shaping operation can be shorter than the stroke necessary to drive the form 9 in rotation for a given bending operation
  • the support 10 is mounted adjustable in position along the longitudinal axis of the device on threaded rods 42, by means of butterfly nuts 43 by interposing spacers 44 of appropriate length on the rods 42, between the end of the body 20 and the support 10 as a function of the desired position of the matrix 11 carried by this support.
  • the apparatus according to the invention makes it possible to produce elbows without any physical effort and in addition without it being necessary to fix the apparatus on a workbench or other support because the elimination of the torsional force. It is thus possible to bend tubes with a diameter up to 28 which was impossible until now with benders of the type usable on site.
  • the apparatus according to the invention makes it possible to shape tubes 8/10 of wall thickness with a radius equal to or less than 4D, thus achieving significant savings in raw material.
  • the apparatus according to the invention can also be adapted to receive a mandrel holder 40, as well as conventional benders, for forming elbows using an internal mandrel 41.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)

Description

La présenté invention concerne d'une façon générale le travail de formage des tubes en métal, notamment des tubes en cuivre, et elle est plus particulièrement relative à une machine de cintrage perfectionnée adaptée pour effec-. tuer différentes opérations de formage de tubes en cuivre sur chantier.The present invention relates generally to the work of forming metal tubes, in particular copper tubes, and it relates more particularly to an improved bending machine adapted to perform. kill different operations of forming copper tubes on site.

On sait que dans les différentes techniques dans lesquelles on utilise des canalisations formées de tubes en cuivre, les monteurs doivent exécuter sur le chantier mème différentes opérations de façonnage des tubes pour les adapter aux conditions particulières de montage.We know that in the different techniques in which pipes made of copper tubes are used, the assemblers must carry out on the site even different operations of shaping the tubes in order to adapt them to the particular mounting conditions.

Il existe différentes machines permettant d'effectuer ces opérations qui comprennent habituellement une pièce semi-circulaire dite "forme" comportant une gorge dans sa périphérie externe autour de laquelle on enroule le tube à façonner en entraînant à force la forme au moyen d'un levier, le tube étant coincé entre une pièce d'appui et ladite forme et glissant sur cette pièce d'appui.There are different machines for performing these operations which usually include a semi-circular piece called "shape" having a groove in its outer periphery around which the tube to be shaped is wound by forcibly driving the shape by means of a lever. , the tube being wedged between a support piece and said shape and sliding on this support piece.

Ces machines de type connu permettent de cintrer des tubes classiques à paroi de 10/10 mm pour former des coudes sur des tubes d'un diamètre maximum de 20x22.These machines of known type make it possible to bend conventional tubes with 10/10 mm walls to form elbows on tubes with a maximum diameter of 20x22.

Les monteurs doivent également effectuer sur chantier un travail de façonnage des extrémités des tubes cintrés ou non pour former des emboitures, des collets ou des épanouis d'une façon connue.The assemblers must also carry out on-site work of shaping the ends of the tubes, whether bent or not, to form sockets, collars or openings in a known manner.

On a notamment décrit par exemple au brevet des ETATS-UNIS No. 2 709 473, un appareil comprenant une pièce d'appui, une forme rotative entraînée par l'intermédiaire d'un pignon et d'une crémaillère reliée à la tige de piston d'un vérin hydraulique à double effet, cet appareil travaillant par enroulement du tube à cintrer sur ladite forme rotative.We have in particular described for example in US Patent No. 2,709,473, an apparatus comprising a support piece, a rotary shape driven by means of a pinion and a rack connected to the piston rod a double-acting hydraulic cylinder, this device working by winding the tube to be bent on said rotary form.

Cependant, cet appareil n'est pas destiné à être utilisé en poste de travail mobile sur un chantier.However, this device is not intended to be used as a mobile workstation on a construction site.

Par ailleurs, on a actuellement tendance à utiliser des tubes en cuivre ayant une épaisseur de paroi de 8/10 de mm seulement afin d'économiser la matière première, et la réduction de l'épaisseur de la paroi des tubes augmente la difficulté du cintrage notamment pout obtenir des coudes de faible rayon et les appareils existant actuellement ne permettent pas de couder des tubes de 8/10 avec un rayon inférieur à 5D et les coudes formés avec un tel rayon présentent toujours des défauts et notamment des plis sur l'intrados ainsi qu'une ovalisation relativement importante.Furthermore, there is currently a tendency to use copper tubes having a wall thickness of only 8/10 mm in order to save the raw material, and the reduction in the thickness of the wall of the tubes increases the difficulty of bending. in particular for obtaining small radius elbows and the devices currently existing do not allow bending of 8/10 tubes with a radius less than 5D and the elbows formed with such a radius always have defects and in particular folds on the lower surface as well as a relatively large ovalization.

L'invention vise à remédier à ces difficultés tout en réalisant une machine pour le façonnage des tubes, notamment en cuivre et permettant de couder des tubes de 8/10 de mm avec un rayon inférieur à 5D sans aucun défaut tout en effectuant simultanément une opération de façonnage d'une extrémité d'un tube, par exemple la formation d'une emboiture ou d'un épanoui.The invention aims to remedy these difficulties while making a machine for shaping tubes, in particular copper and allowing to bend tubes of 8/10 mm with a radius less than 5D without any defect while simultaneously performing an operation for shaping one end of a tube, for example the formation of a socket or a swell.

L'invention a pour objet à cet effet un appareil de façonnage de tubes, notamment de tubes de cuivre à paroi mince, utilisable sur chantier, du type comprenant une pièce d'appui, une forme rotative entraînée par l'intermédiaire d'un pignon et d'une crémaillère solidaire de la tige de piston d'un vérin hydraulique à double effet pour cintrer le tube, caractérisé en ce qu'il comprend: des moyens de façonnage d'emboiture sur un tube, un organe unique pour actionner simultanément lesdits moyens de façonnage d'emboiture et ladite forme rotative, des moyens pour monter coulissant ledit organe d'actionnement, et des moyens de liaison avec le piston du vérin.The subject of the invention is to this end a device for shaping tubes, in particular thin-walled copper tubes, usable on site, of the type comprising a support piece, a rotary shape driven by means of a pinion and a rack integral with the piston rod of a double-acting hydraulic cylinder for bending the tube, characterized in that it comprises: means for shaping socket on a tube, a single member for simultaneously actuating said tubes socket shaping means and said rotary shape, means for slidingly mounting said actuating member, and means for connecting with the piston of the jack.

Au dessin annexé et donné uniquement à titre d'exemple, la Figure unique est vue en perspective éclatée d'un appareil de façonnage de tubes suivant l'invention.In the accompanying drawing, given solely by way of example, the single figure is an exploded perspective view of a tube shaping apparatus according to the invention.

En se référant au dessin, l'appareil suivant l'invention comprend un corps creux 20 de forme allongée à une extrémité duquel est fixé un bloc 21, et un organe de liaison constitué par une chape 2 fixée à son extrémité opposé.Referring to the drawing, the apparatus according to the invention comprises a hollow body 20 of elongated shape at one end of which is fixed a block 21, and a connecting member constituted by a yoke 2 fixed at its opposite end.

Un alésage axial 22 s'étend à travers le corps 20 à travers la chape 2 et le bloc 21. Une tige 4 est montée coulissante dans l'alésage 22 et comporte à une extrémité un organe 23 de liaison dont le rôle sera décrit dans la suite et à son extrémité opposée un poinçon 13 du type utilisé avec les matrices d'emboitures pour former sur des extrémités de tube des collets, des épanouis ou autres types d'emboitures au moyen d'une matrice de façon classique. La tige 4 comporte en outre entre ses extrémités une partie intermédiaire usinée 24 s'étendant longitudinalement dans laquelle est formée par usinage une crémaillère ayant des dents 25.An axial bore 22 extends through the body 20 through the yoke 2 and the block 21. A rod 4 is slidably mounted in the bore 22 and comprises at one end a connecting member 23 whose role will be described in the following and at its opposite end a punch 13 of the type used with the matrices of sockets for forming on the ends of the tube collars, expanses or other types of sockets by means of a matrix in a conventional manner. The rod 4 further comprises between its ends a machined intermediate portion 24 extending longitudinally in which a rack having teeth 25 is formed by machining.

Le poinçon amovible 13 fait saillie de l'alésage 22 sur le bloc 21, tandis que l'organe de liaison 23 fait saillie à l'extrémité opposée du corps 20 à travers la chape 2.The removable punch 13 projects from the bore 22 on the block 21, while the connecting member 23 projects at the opposite end of the body 20 through the yoke 2.

Un support 10 de matrice d'emboitures est fixé autour de l'orifice de l'alésage 22 sur le bloc 21 et ce support 10 comporte une branche inférieure 26 et une branche supérieure 27, la branche inférieure comportant deux tétons 28 en saillie vers le haut et la branche supérieure comportant une vis de serrage 12, les tétons 28 et la vis 12 étant adaptés pour fixer et retenir entre les branches 26 et 27 une matrice d'emboitures classique 11 en deux parties, les tétons 28 étant adaptés pour s'ajuster dans des trous prévus dans la partie inférieure de la matrice 11, tandis que la vis d'arrêt 12 permet de serrer les deux parties de la matrice.A support 10 for the socket matrix is fixed around the orifice of the bore 22 on the block 21 and this support 10 comprises a lower branch 26 and an upper branch 27, the lower branch comprising two pins 28 projecting towards the top and the upper branch comprising a clamping screw 12, the pins 28 and the screw 12 being adapted to fix and retain between the branches 26 and 27 a conventional socket matrix 11 in two parts, the pins 28 being adapted to adjust in the holes provided in the lower part of the matrix 11, while the stop screw 12 makes it possible to tighten the two parts of the matrix.

Un bossage 29 est formé sur la paroi supérieure du bloc 21 et porte un axe vertical dont une extrémité 5 fait saillie vers le haut, cet axe comportant un pignon 30 à son extrémité inférieure et une tête 31 à son extrémité supérieure, faisant saillie au-dessus du bossage 29.A boss 29 is formed on the upper wall of the block 21 and carries a vertical axis, one end 5 of which projects upwards, this axis comprising a pinion 30 at its lower end and a head 31 at its upper end, projecting above the boss 29.

Une glissière 6 est fixée entre le bossage 29 et la chape 2 de façon à se trouver espacée au-dessus du corps 20 et un coulisseau 7 constituant un support de contreforme est monté coulissant sur la glissière 6. Une tige filetée 14 est vissée dans un support 32 solidaire du bord supérieur de la chape 2 et son extrémité tourillonne dans le coulisseau 7 dans lequel elle est retenue de façon à pouvoir tourner librement, la tige 14 comportant un bouton moleté 33 à son extrémité opposée au coulisseau 7.A slide 6 is fixed between the boss 29 and the yoke 2 so as to be spaced above the body 20 and a slide 7 constituting a counterform support is slidably mounted on the slide 6. A threaded rod 14 is screwed into a support 32 secured to the upper edge of the yoke 2 and its end pivots in the slide 7 in which it is retained so as to be able to rotate freely, the rod 14 comprising a knurled button 33 at its end opposite to the slide 7.

Le coulisseau 7 comporte une rainure 34 dans laquelle est disposée une contreforme 8 au moyen d'un axe amovible 35 pouvant être adapté dans des trous, verticalement dans le coulisseau 7.The slide 7 has a groove 34 in which a counterform 8 is arranged by means of a removable pin 35 which can be adapted in holes, vertically in the slide 7.

La contreforme 8 est constituée par un bloc ayant un trou vertical 36 adapté pour recevoir l'axe 35 et une gorge incurvée 37 de section semi circulaire, qui est un segment de cercle.The counterform 8 is constituted by a block having a vertical hole 36 adapted to receive the axis 35 and a curved groove 37 of semi-circular section, which is a segment of a circle.

Un forme 9 de type classique semi circulaire comportant une gorge 38 dans sa partie périphérique courbe comporte des moyens complémentaires de ceux de la tête 31 de l'axe 5 permettant de la rendre solidaire en rotation de cette dernière. On comprend bien entendu que l'agencement est tel que la gorge 38 de la forme 9 et la gorge 37 de la contreforme 8 se trouvent l'une en face de l'autre, leurs axes étant contenus dans un même plan.A shape 9 of the conventional semi-circular type comprising a groove 38 in its curved peripheral part comprises means complementary to those of the head 31 of the axis 5 enabling it to be made to rotate with the latter. It is understood of course that the arrangement is such that the groove 38 of the form 9 and the groove 37 of the counterform 8 are located opposite one another, their axes being contained in the same plane.

Les ailes latérales de la chape 2 comportent des moyens tels que des trous 3 adaptés pour coopérer avec des moyens complémentaires d'un vérin d'actionnement 1 qui, dans cet exemple, est un vérin hydraulique à double effet. On comprend bien entendu que l'invention n'est pas limitée à l'utilisation d'un vérin hydraulique mais que l'on peut adapter à la chape 2 un vérin par exemple mécanique ou tout autre moyen moteur approprié.The lateral wings of the yoke 2 comprise means such as holes 3 adapted to cooperate with complementary means of an actuating cylinder 1 which, in this example, is a double-acting hydraulic cylinder. It is understood of course that the invention is not limited to the use of a hydraulic cylinder but that one can adapt to the yoke 2 a cylinder, for example mechanical or any other suitable motor means.

Le vérin 1 comporte un levier 39 d'actionnement et la tige de piston (non représentée) du vérin est reliée à la tige 4 par l'intermédiaire de l'organe de liaison 23 qui, dans cet exemple, est représenté sous la forme d'une extrémité filetée pouvant coopérer avec un élément fileté solidaire de la tige de piston du vérin.The jack 1 has an actuating lever 39 and the piston rod (not shown) of the jack is connected to the rod 4 by means of the connecting member 23 which, in this example, is shown in the form of 'a threaded end which can cooperate with a threaded element integral with the piston rod of the jack.

Pour cintrer un tube au moyen de l'appareil décrit ci-dessus, on opère de façon classique en fixant un collier autoserreur à l'extrémité du tube, ce collier prenant appui contre une extrémité de la gorge semi-circulaire 38 de la forme 9. On règle la contreforme 8 pour amener sa gorge 37 en contact avec le départ du tube à cintrer et on actionne le levier 39 du vérin. La tige de piston du vérin pousse la tige 4 dont la crémaillère 25 engrène avec le pignon 30, entraînant la forme 9 en rotation avec le tube qu'elle porte qui glisse dans la gorge 37 de la contreforme 8. On remarquera que, suivant une caractéristique importante de l'invention, la contreforme 8 est montée dans le coulisseau de support 7 de façon à pouvoir pivoter autour de l'axe vertical 35 avec un certain jeu qui lui permet de prendre librement la position voulue pour épouser parfaitement la courbure du tube définie par la forme 9. Le montage pivotant de la contreforme 8 permet de cintrer des tubes de 8/10 avec un rayon R=4D sans défaut ni plis sur l'intrados et avec une faible ovalisation, ces résultats étant dus d'une part, au profil courbe de la gorge de la contreforme et à son degré de liberté.To bend a tube by means of the apparatus described above, one operates in a conventional manner by fixing a self-locking collar at the end of the tube, this collar bearing against one end of the semi-circular groove 38 of the shape 9 The counterform 8 is adjusted to bring its groove 37 into contact with the start of the tube to be bent and the lever 39 of the jack is actuated. The piston rod of the jack pushes the rod 4, the rack 25 of which meshes with the pinion 30, causing the form 9 to rotate with the tube which it carries which slides in the groove 37 of the counterform 8. It will be noted that, according to a an important characteristic of the invention, the counterform 8 is mounted in the support slide 7 so as to be able to pivot around the vertical axis 35 with a certain clearance which allows it to freely take the desired position to perfectly match the curvature of the tube defined by the form 9. The pivoting mounting of the counterform 8 makes it possible to bend 8/10 tubes with a radius R = 4D without defects or folds on the lower surface and with a low ovalization, these results being due on the one hand , to the curved profile of the throat of the counterform and to its degree of freedom.

Au fur et à mesure que la tige 4 est poussée par la tige de piston du vérin le poinçon 13 fait saillie à travers l'orifice de l'alésage 22 entre les branches supérieures et inférieures du support de matrice 10.As the rod 4 is pushed by the piston rod of the jack, the punch 13 projects through the orifice of the bore 22 between the upper and lower branches of the matrix support 10.

Aussitôt que le coude a été formé sur un premier tube, l'opérateur monte la matrice 11 1 dans son support avec l'une des extrémités du tube qu'il vient de couder entre les parties de la matrice, en fixant un poinçon 13 approprié à l'extrémité de la tige 4 et il peut simultanément procéder à une nouvelle opération de coudage d'un second tube tout en formant simultanément l'emboiture désirée dans l'une des extrémités du tube préalablement coudé. On remarquera que le vérin doit être à double effet afin de permettre d'exercer la force nécessaire pour retirer le poinçon 13 de l'emboiture formée dans le tube retenu par la matrice.As soon as the elbow has been formed on a first tube, the operator mounts the matrix 11 1 in its support with one of the ends of the tube which it has just bent between the parts of the matrix, by fixing an appropriate punch 13 at the end of the rod 4 and it can simultaneously carry out a new bending operation of a second tube while simultaneously forming the desired socket in one of the ends of the previously bent tube. It will be noted that the jack must be double-acting in order to allow to exert the force necessary to withdraw the punch 13 from the socket formed in the tube retained by the matrix.

La course du poinçon 13 pour effectuer une opération de façonnage pouvant être plus courte que la course nécessaire pour entraîner la forme 9 en rotation pour une opération de cintrage donnée, le support 10 est monté réglable en position suivant l'axe longitudinal de l'appareil sur des tiges filetées 42, au moyen d'écrous papillons 43 en interposant des entretoises 44 de longueur appropriée sur les tiges 42, entre l'extrémité du corps 20 et le support 10 en fonction de la position désirée de la matrice 11 portée par ce support.The stroke of the punch 13 to perform a shaping operation can be shorter than the stroke necessary to drive the form 9 in rotation for a given bending operation, the support 10 is mounted adjustable in position along the longitudinal axis of the device on threaded rods 42, by means of butterfly nuts 43 by interposing spacers 44 of appropriate length on the rods 42, between the end of the body 20 and the support 10 as a function of the desired position of the matrix 11 carried by this support.

En ce qui concerne le façonnage des tubes de fort diamètre, l'appareil suivant l'invention permet de réaliser des coudes sans aucun effort physique et en outre sans qu'il soit nécessaire de fixer l'appareil sur un établi ou autre support du fait de la suppression de l'effort de torsion. On peut ainsi couder des tubes d'un diamètre s'élevant jusqu'à 28 ce qui était impossible jusqu'à présent avec les cintreuses du type utilisable sur chantier.With regard to the shaping of large diameter tubes, the apparatus according to the invention makes it possible to produce elbows without any physical effort and in addition without it being necessary to fix the apparatus on a workbench or other support because the elimination of the torsional force. It is thus possible to bend tubes with a diameter up to 28 which was impossible until now with benders of the type usable on site.

On comprend également que l'appareil suivant l'invention permet de façonner des tubes de 8/10 d'épaisseur de paroi avec un rayon égal ou inférieur à 4D, réalisant ainsi une économie importante de matière première.It is also understood that the apparatus according to the invention makes it possible to shape tubes 8/10 of wall thickness with a radius equal to or less than 4D, thus achieving significant savings in raw material.

L'appareil suivant l'invention peut également être adapté pour recevoir un porte- mandrin 40, de même que les cintreuses classiques, pour former des coudes en utilisant un mandrin intérieur 41.The apparatus according to the invention can also be adapted to receive a mandrel holder 40, as well as conventional benders, for forming elbows using an internal mandrel 41.

Claims (8)

1. A composite apparatus for shaping in particular thin-walled copper tubes, of the type comprising a pressure member (8), a rotary form (9) driven through a gear pinion (30) and a rack (35) rigid with the piston rod of a double- acting hydraulic cylinder device (1) for bending the tube, characterised in that it comprises means (11, 13) for shaping a socket on a tube, single means (4) for simultaneously actuating said socket shaping means (11, 13) and said rotary form (9), means (20, 22) for slidably mounting said actuating means (4, and connecting means (2, 23) for connection with the piston of the cylinder device.
2. An apparatus according to claim 1, characterised in that said socket shaping means comprise a punch (13) which is detachably mounted on one end of said single actuating means (4) and a die (11) adapted to cooperate with retaining means (10, 12, 28) provided on the apparatus.
3. An apparatus according to claim 2, characterised in that said single actuating means is a rod (4) which carries said rack (25).
4. An apparatus according to claim 1, 2 or 3, characterised in that said means for slidably mounting said actuating means (4) comprise a bore (22) formed in a body (20) of the apparatus and in which said rod (4) is slidably mounted.
5. An apparatus according to claim 4, characterised in that said connecting means comprise a yoke (2) rigid with the body (20) and means (23) rigid with said rod (4).
6. An apparatus according to claim 2, characterised in that said retaining means comprise a support (10) rigid with the body of the apparatus and studs (28) and a screw (12) which projects from said support.
7. An apparatus according to any one of the claims 1 to 6, characterised in that the member or counter form (8) is detachably mounted in a support slide (7) so as to be freely pivotable about a pin (35) with a certain play in the plane of rotation of the form (9).
8. An apparatus according to claim 6, characterised in that said support (10) is mounted to be adjustable in position along a longitudinal axis of the body (20) of the apparatus, the position of said support relative to said body determining the length of the travel of the actuating means (4, 25) with respect to the die (11).
EP19810400805 1980-05-28 1981-05-21 Apparatus for deforming tubes Expired EP0041432B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8011833A FR2483271A1 (en) 1980-05-28 1980-05-28 TUBE SHAPING APPARATUS
FR8011833 1980-05-28

Publications (2)

Publication Number Publication Date
EP0041432A1 EP0041432A1 (en) 1981-12-09
EP0041432B1 true EP0041432B1 (en) 1983-12-14

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP19810400805 Expired EP0041432B1 (en) 1980-05-28 1981-05-21 Apparatus for deforming tubes

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EP (1) EP0041432B1 (en)
DE (1) DE3161627D1 (en)
ES (1) ES8204315A1 (en)
FR (1) FR2483271A1 (en)

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FR2574685B1 (en) * 1984-12-14 1988-10-14 Virax Sa PORTABLE BENDER WITH ROTARY HYDRAULIC CYLINDER WITH REVERSIBLE SCREW FOR BENDING BY WINDING
IT9047713A1 (en) * 1990-03-02 1991-09-03 Cml Costr Mecc Liri Srl BENDING MACHINE PROVIDED WITH BENDING HEAD, WITH MULTI-FUNCTION TOOL, AND PROGRAMMABLE BY COMPUTERIZED COMPLEX.
CH682306A5 (en) * 1990-07-27 1993-08-31 Alex Lipp
IT1252748B (en) * 1991-10-09 1995-06-28 Cbc Spa PIPE BENDING MACHINE WITH AUXILIARY MECHANISM FOR PERFORMING AUXILIARY OPERATIONS.
FR2712215B1 (en) * 1993-11-08 1996-12-20 Virax Sa Multi-function machine with an improved vice and an electronic control controlling the bending and shaping of the tube ends.
FR2891479B1 (en) * 2005-09-30 2009-02-20 Virax Sa TOOL FOR WORKING TUBES.
CN103212989B (en) * 2013-04-19 2015-04-15 资阳晨风电气有限公司 Multifunctional tool for machining pipeline
CN103990727B (en) * 2014-05-23 2015-11-18 奥美森智能装备股份有限公司 A kind of expanding rod device
CN103978073A (en) * 2014-05-23 2014-08-13 浙江国华家具有限公司 Bending machine capable of rapidly manufacturing legs of leisure chair
CN108672517A (en) * 2018-07-18 2018-10-19 中山精达特克机械有限公司 A kind of pipe fitting Combined machining equipment
CN109365659B (en) * 2018-11-30 2020-04-17 四川雪源车用空调科技有限公司 Reaming processingequipment of air conditioner refrigeration copper pipe

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FR2382283A1 (en) * 1977-03-03 1978-09-29 Mercier J Slide for bar bending machine - has double acting drive cylinder which operates support with tools at each end

Also Published As

Publication number Publication date
FR2483271A1 (en) 1981-12-04
ES502899A0 (en) 1982-04-01
ES8204315A1 (en) 1982-04-01
DE3161627D1 (en) 1984-01-19
FR2483271B1 (en) 1984-07-13
EP0041432A1 (en) 1981-12-09

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