EP1311356A1 - Tube bending machine - Google Patents

Tube bending machine

Info

Publication number
EP1311356A1
EP1311356A1 EP01919545A EP01919545A EP1311356A1 EP 1311356 A1 EP1311356 A1 EP 1311356A1 EP 01919545 A EP01919545 A EP 01919545A EP 01919545 A EP01919545 A EP 01919545A EP 1311356 A1 EP1311356 A1 EP 1311356A1
Authority
EP
European Patent Office
Prior art keywords
tube
bending
bending head
counter
machine according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP01919545A
Other languages
German (de)
French (fr)
Other versions
EP1311356B1 (en
Inventor
Yves Latour
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.)
Numalliance SAS
Original Assignee
Ateliers de Constructions Mecaniques Latour et Fils
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 Ateliers de Constructions Mecaniques Latour et Fils filed Critical Ateliers de Constructions Mecaniques Latour et Fils
Publication of EP1311356A1 publication Critical patent/EP1311356A1/en
Application granted granted Critical
Publication of EP1311356B1 publication Critical patent/EP1311356B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D7/00—Bending rods, profiles, or tubes
    • B21D7/02—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment
    • B21D7/022—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment over a stationary forming member only

Definitions

  • the present invention relates to a machine for bending tubes in series and at a high rate.
  • These devices include a shape having the desired radius of curvature, and a counterform capable of being displaced coaxially with said shape, around its periphery, by driving the tube to be bent which is wedged between said shape and said counter shape, so as to wrap it on said shape.
  • a tube cannot be bent or bent in the same way as a wire is, since because of its axial channel, a tube is likely to be crushed.
  • the form and the counter-form each have a groove of cross section in an arc of a circle with a radius of curvature corresponding to the diameter of the tube to be bent.
  • the counter-form is in the form of a block movable in pivoting in a limited manner, and in which the groove is formed longitudinally, or else a grooved roller mounted in free rotation. The bending operation is carried out while the tube is in contact with the bottoms of the two grooves.
  • the present invention relates more particularly to machines which allow the bending of tubes in series and at a high rate, these tubes being in particular intended for the production of chassis.
  • These machines comprise a means 1 landscape of the tube which supplies a bending head provided with movable bending tools to each other.
  • the present invention aims to remedy the various aforementioned drawbacks, by proposing a machine for bending a tube, which allows high working rates, and which in particular allows bending a tube at 180 °, without risk of crushing of the tube.
  • the machine for bending a tube in series and at a high rate comprises a bending head comprising a shape and a counter-shape which at the periphery have a groove of semi-circular section, as well as means allowing 'driving said counter-form in rotation coaxial with said form so as to drive the tube to be bent and to wind it on said form, and it is essentially characterized in that said form consists of a disc having a cutaway arranged in a cord of said disc, and in that it comprises means making it possible to move said disc bending head relative to the axis of the tube, along a path passing through the axes of said form and counter-form, as well as means making it possible to rotate said form axially, independently of the movement of said counter-form.
  • the means making it possible to move the bending head relative to the tube, drive the latter along a rectilinear trajectory.
  • the means making it possible to move said bending head relative to the tube drive the latter along a curved path.
  • the counterform consists of a roller.
  • the counterform consists of a pressure block.
  • the means making it possible to move the bending head relative to the tube, and the means making it possible to rotate the shape axially consist of stepping motors numerically controlled.
  • the cambering head is carried by an arm movable in pivoting, on which it is movable in pivoting coaxially to the shape, the latter being mounted movable in axial pivoting on said head bending.
  • FIG. 1 shows a partial schematic view of a machine for bending tubes.
  • Figures 2a, 2b, 2c and 2d show partial schematic views of the same machine during different successive phases of a bending operation.
  • FIG. 1 represents the bending head 1 of a machine according to the invention, on which is placed a tube 2 held by a fitting means, not shown, which consists of an element capable of holding the tube 2 and to drive it axially in one direction as in the other as shown by the double arrow X.
  • the bending head 1 has a shape 3 and a counter shape 4, between which the tube 2 passes.
  • Form 3 consists of a disc having a cutaway 30 arranged along a cord, while its curved edge 31 has a groove 32, of which only the bottom 33 is shown by transparency, of semi-circular cross section with radius equal to that of tube 2.
  • the counterform 4 consists of a roller mounted idle on a shaft 40, and which has a groove 41 at the periphery, of which only the bottom 42 is shown by transparency, of semi-circular cross section also of the same radius as that of the tube 2.
  • the form 3 is mounted in rotation on the bending head 1 by means of a shaft 34 capable of being driven in rotation by a motor means, not shown, so as to rotate the form 3 axially with respect to the head camber 1, in one or the other direction, according to the double arrow Y.
  • the bending head 1 is carried by an arm, not shown, on which it can, by means of motor means, also not shown, pivot coaxially to the axis of rotation of the form 3, in a direction as in 1 other, according to the double arrow Z.
  • the arm which carries the bending head 1
  • the fitting means of the tube 2 so that it describes a trajectory passing through the shafts 34 and 40.
  • this trajectory which is materialized by the double arrow R, is curved, it results from the pivoting of the arm. It should be noted that this trajectory can preferably be rectilinear, which can however make the construction of the machine more complex.
  • the dimensions of the form 3 and the counter-form 4, their center distance, as well as the height of the rope according to which the cutaway 30 is made, are such that, when the cutaway 30 is in line with the counter-shape 4 , there remains between the form 3 and the counter-form 4 a space at least equal to the diameter of the tube 2.
  • FIGS. 2a, 2b, 2c and 2d we can see different phases of a bending operation of the tube 2, knowing that FIG. 1 represents a preliminary phase where the cutaway 30 is in line with the counterform 4 and the bending head 1 is positioned so that the tube 2 comes into contact with the cutaway 30.
  • the next phase consists in rotating the form 3 along Y A so that the tube 2, which is in the locking position in the axial direction, is engaged in the groove 32, then in blocking the form 3 in this position relative to the bending head 1.
  • the tube 2 is thus clamped between the form 3 and the counter-form 4, in the grooves thereof 32 and 41 respectively.
  • the grooves 32 and 41 are preferably semi-circular, and of a diameter equal to that of the tube 2, so that there is a close contact between the tube 2 and the bottoms 33 and 42 of the grooves, respectively 32 and 41.
  • the depth of the grooves 32 and 41 is equal to the radius of the tube 2
  • the height of the cord along which the cutaway 30 is made is equal to the diameter of the tube.
  • the tube 2 by immobilizing it on the form 3 by means of the counter-form 4, which in this case may not be a roller but a locking means such than a pressing block for example, and by combining on the one hand a rotation of the bending head 1 according to Z B synchronized with a rotation according to Y B of the form 3 having previously rotated it according to Y A so as not to not wind the tube 2 on the cutaway 30, and on the other hand a proportional advance movement of the tube 2 along X.
  • the counter-form 4 which in this case may not be a roller but a locking means such than a pressing block for example
  • This variant makes it possible in particular to bend a tube close to its end, or near a bend or a discharge.
  • FIG. 2d it can be seen that, after bending the tube 2, the latter is moved axially, the counterform 4 has been brought back to its starting position by a rotation in the direction Z A , the shape 3 has turned in direction Y B to bring the cutaway 30 parallel to the tube 2, and the bending head 1 has been moved in the direction R A so that the cutaway 30 comes into contact with the tube 2 and that the latter sort of groove 41, so that the tube 2 can, after cutting, be released laterally.

Abstract

A machine for high rate serial bending of a tube includes a bending head provided with a radius block and a backing block including, at the periphery, a groove with a semicircular cross-section and a driver for the backing block in rotation coaxial to the radius block, so as to drive the tube to be bent and wind it on the radius block. The radius block includes a disc including a beveled panel arranged along a chord of the disc and it includes device for moving the bending head relative to the axis of the tube along a path passing through the pins of the radius block and the backing block and a device for axially rotating the radius block independently from the displacement of the backing block.

Description

MACHINE POUR LE CAMBRAGE DE TUBESTUBE BENDING MACHINE
La présente invention a pour objet une machine pour le cambrage de tubes en série et à cadence élevée.The present invention relates to a machine for bending tubes in series and at a high rate.
On connaît déjà de nombreux dispositifs permettant de cambrer, ou cintrer, des tubes, et qui consistent pour la plupart en des outils à main, fonctionnant électriquement ou non, notamment utilisés par les professionnels du bâtiment pour cintrer des tubes de cuivre en vue de la réalisation d'installations sanitaires .Numerous devices are already known for bending, or bending, tubes, and which consist for the most part of hand tools, electrically or not, in particular used by building professionals to bend copper tubes for the purpose of construction of sanitary facilities.
Ces dispositifs comportent une forme présentant le rayon de courbure désiré, et une contre-forme apte à être déplacée coaxialement à ladite forme, sur le pourtour de celle-ci, en entraînant le tube à cintrer qui est coincé entre ladite forme et ladite contre-forme, de manière à l'enrouler sur ladite forme.These devices include a shape having the desired radius of curvature, and a counterform capable of being displaced coaxially with said shape, around its periphery, by driving the tube to be bent which is wedged between said shape and said counter shape, so as to wrap it on said shape.
Un tube ne peut pas être cambré ou cintré de la même manière que l'est un fil, puisque du fait de son canal axial, un tube risque d' être écrasé . Aussi , la forme et la contre-forme comportent chacune une gorge de section transversale en arc de cercle de rayon de courbure correspondant au diamètre du tube à cambrer.A tube cannot be bent or bent in the same way as a wire is, since because of its axial channel, a tube is likely to be crushed. Also, the form and the counter-form each have a groove of cross section in an arc of a circle with a radius of curvature corresponding to the diameter of the tube to be bent.
De manière générale , la contre-forme se présente sous la forme d'un bloc mobile en pivotement de manière limitée, et dans lequel est pratiquée longitudinalement la gorge, ou bien d'un galet à gorge monté en rotation libre . L ' opération de cambrage est réalisée alors que le tube est au contact avec les fonds des deux gorges .In general, the counter-form is in the form of a block movable in pivoting in a limited manner, and in which the groove is formed longitudinally, or else a grooved roller mounted in free rotation. The bending operation is carried out while the tube is in contact with the bottoms of the two grooves.
On notera que plus les gorges sont enveloppantes, c'est-à-dire profondes avec une profondeur maximum égale au rayon du tube à cambrer, et moins ledit tube risque d'être écrasé. Le tube est donc retenu latéralement par les gorges de la forme et de la contre-forme, en sorte que pour le désengager latéralement de l'outil, afin de l'enlever ou d'y réaliser un second cambrage dans une autre direction, l'outil est muni de moyens permettant d' éloigner la forme de la contre-forme . Ces moyens permettent en outre le remplacement de la forme par une autre d'un rayon de courbure différent et/ou adaptée à un tube d'un autre diamètre.Note that the more the grooves are enveloping, that is to say deeper with a maximum depth equal to the radius of the tube to be bent, the less said tube is likely to be crushed. The tube is therefore retained laterally by the grooves of the form and the counter-form, so that in order to disengage it laterally from the tool, in order to remove it or carry out a second bend in it in another direction, l 'tool is provided with means for moving away the form of the counter-form. These means also allow the shape to be replaced by another with a different radius of curvature and / or adapted to a tube of another diameter.
Pour permettre le désengagement du tube, il est prévu sur les cintreuses d'utiliser des formes présentant un pan coupé en sorte de permettre de désengager le tube de la gorge de la contre-forme. C'est le cas par exemple de la machine du document GB 1.298.666, laquelle est destinée à plier des tubes en U en réalisant simultanément deux plis à angle droit chacun sur une contre-forme. On notera que pour permettre de désengager le tube, les deux contre-formes comportent chacune deux pans coupés .To allow the disengagement of the tube, it is provided on the bending machines to use forms having a cutaway so as to allow to disengage the tube from the throat of the counter-form. This is the case, for example, of the machine in document GB 1,298,666, which is intended for bending U-shaped tubes by simultaneously making two folds at right angles each on a counterform. Note that to allow the tube to be disengaged, the two counterforms each have two cut sides.
On notera également que la machine objet de ce document n'est pas destiné au même usage que celui de la présente invention et qu'en aucun cas elle ne saurait réaliser les mêmes pliages.It will also be noted that the machine object of this document is not intended for the same use as that of the present invention and that in no case it can not achieve the same folding.
En effet, la présente invention concerne plus particulièrement les machines qui permettent de réaliser le cambrage de tubes en série et à une cadence élevée, ces tubes étant notamment destinés à la réalisation de châssis. Ces machines comportent un moyen d1 aménage du tube qui approvisionne une tête de cambrage équipée d'outils de cambrage mobiles les uns par rapport aux autres .Indeed, the present invention relates more particularly to machines which allow the bending of tubes in series and at a high rate, these tubes being in particular intended for the production of chassis. These machines comprise a means 1 landscape of the tube which supplies a bending head provided with movable bending tools to each other.
Ces machines sont toutefois plus particulièrement destinées à cambrer du fil, aussi, le cambrage obtenu n'est pas toujours d'une excellente qualité, le tube étant dans la plupart des cas légèrement écrasé au niveau de sa ou ses parties cintrées . Par ailleurs, sur ce type de machine, déplacer la forme par rapport à la contre-forme pour permettre le dégagement latéral du tube, constitue une perte de temps qui est préjudiciable à la productivité .These machines are however more particularly intended for bending wire, also, the bending obtained is not always of excellent quality, the tube being in most cases slightly crushed at its bent part or parts. Furthermore, on this type of machine, moving the form relative to the counter-form to allow lateral release of the tube constitutes a waste of time which is detrimental to productivity.
En outre, l'utilisation des machines de ce type est limitée, celles-ci ne permettant pas par exemple de cambrer un tube à 180° puis de le désengager afin de l'enlever ou de réaliser un cambrage dans une autre direction.In addition, the use of machines of this type is limited, these not allowing, for example, to bend a tube at 180 ° and then to disengage it in order to remove it or carry out bending in another direction.
On notera qu'il est souvent nécessaire de réaliser sur un tube deux cambrages , voire plus , de directions différentes , ce qui est obtenu par le désengagement du tube, puis en le repositionnant après lui avoir fait opérer un pivotement axial . Sur une machine telle que précitée, le pivotement axial du tube est relatif, c'est en effet la tête de cambrage qui tourne autour de 1 ' axe du tube ; or s'il n ' existe pas de possibilité de désengagement latéral, qui plus est lors d'un cambrage à 180°, ledit pivotement est impossible.It will be noted that it is often necessary to carry out on a tube two bends, or even more, of different directions, which is obtained by the disengagement of the tube, then by repositioning it after having made it operate an axial pivoting. On a machine as mentioned above, the axial pivoting of the tube is relative, it is indeed the bending head which rotates around one axis of the tube; or if there is no possibility of lateral disengagement, moreover during a 180 ° bending, said pivoting is impossible.
La présente invention a pour but de remédier aux divers inconvénients précités , en proposant une machine pour le cambrage d'un tube, qui autorise des cadences de travail élevées, et qui permet notamment de cambrer un tube à 180°, sans risque d'écrasement du tube.The present invention aims to remedy the various aforementioned drawbacks, by proposing a machine for bending a tube, which allows high working rates, and which in particular allows bending a tube at 180 °, without risk of crushing of the tube.
La machine pour le cambrage d'un tube en série et à cadence élevée selon l'invention comporte une tête de cambrage comprenant une forme et une contre-forme qui comportent en périphérie une gorge de section semi-circulaire, ainsi que des moyens permettant d'entraîner ladite contre-forme en rotation coaxialement à ladite forme de manière à entraîner le tube à cambrer et à l'enrouler sur ladite forme, et elle se caractérise essentiellement en ce que ladite forme consiste en un disque présentant un pan coupé disposé selon une corde dudit disque, et en ce qu'elle comporte des moyens permettant de déplacer ladite tête de cambrage par rapport à 1 ' axe du tube , selon une trajectoire passant par les axes desdites forme et contre-forme, ainsi que des moyens permettant de faire tourner axialement ladite forme, indépendamment du déplacement de ladite contre- forme .The machine for bending a tube in series and at a high rate according to the invention comprises a bending head comprising a shape and a counter-shape which at the periphery have a groove of semi-circular section, as well as means allowing 'driving said counter-form in rotation coaxial with said form so as to drive the tube to be bent and to wind it on said form, and it is essentially characterized in that said form consists of a disc having a cutaway arranged in a cord of said disc, and in that it comprises means making it possible to move said disc bending head relative to the axis of the tube, along a path passing through the axes of said form and counter-form, as well as means making it possible to rotate said form axially, independently of the movement of said counter-form.
Par le positionnement du pan coupé de la forme, au droit de la contre-forme, et par le déplacement de la tête de cambrage, et donc de la forme et de la contre-forme par rapport à 1 ' axe du tube, il est possible de dégager latéralement le tube cambré, en prévoyant un pan coupé de dimension adéquate, c'est-à-dire lorsque la distance qui sépare le pan coupé du bord de la contre-forme est au moins égale au diamètre dudit tube.By positioning the cutaway of the form, in line with the counter-form, and by the displacement of the bending head, and therefore of the form and the counter-form relative to the axis of the tube, it is possible to release the curved tube laterally, by providing a cutaway of adequate size, that is to say when the distance between the cutaway from the edge of the counterform is at least equal to the diameter of said tube.
Selon une caractéristique additionnelle de la machine selon l'invention, les moyens permettant de déplacer la tête de cambrage par rapport au tube, entraînent celle-ci selon une trajectoire rectiligne.According to an additional characteristic of the machine according to the invention, the means making it possible to move the bending head relative to the tube, drive the latter along a rectilinear trajectory.
Selon une autre caractéristique additionnelle de la machine selon l'invention, les moyens permettant de déplacer ladite tête de cambrage par rapport au tube entraînent celle-ci selon une trajectoire courbe.According to another additional characteristic of the machine according to the invention, the means making it possible to move said bending head relative to the tube drive the latter along a curved path.
Selon une autre caractéristique additionnelle de la machine selon l'invention, la contre-forme consiste en un galet.According to another additional characteristic of the machine according to the invention, the counterform consists of a roller.
Selon une autre caractéristique additionnelle de la machine selon l'invention, la contre-forme consiste en un bloc presseur.According to another additional characteristic of the machine according to the invention, the counterform consists of a pressure block.
Selon une autre caractéristique additionnelle de la machine selon l'invention, les moyens permettant de déplacer la tête de cambrage par rapport au tube, et les moyens permettant de faire tourner axialement la forme, consistent en des moteurs pas à pas commandés numériquement. Selon un mode de réalisation préférentiel de la machine selon l'invention, la tête de cambrage est portée par un bras mobile en pivotement, sur lequel elle est mobile en pivotement coaxialement à la forme, cette dernière étant montée mobile en pivotement axial sur ladite tête de cambrage.According to another additional characteristic of the machine according to the invention, the means making it possible to move the bending head relative to the tube, and the means making it possible to rotate the shape axially, consist of stepping motors numerically controlled. According to a preferred embodiment of the machine according to the invention, the cambering head is carried by an arm movable in pivoting, on which it is movable in pivoting coaxially to the shape, the latter being mounted movable in axial pivoting on said head bending.
Les avantages et les caractéristiques de la machine selon l'invention, ressortiront plus clairement de la description qui suit et qui se rapporte au dessin annexé, lequel en représente un mode de réalisation non limitatif.The advantages and characteristics of the machine according to the invention will emerge more clearly from the description which follows and which relates to the appended drawing, which represents a non-limiting embodiment thereof.
Dans le dessin annexé :In the attached drawing:
- la figure 1 représente une vue schématique partielle d'une machine pour le cambrage de tubes .- Figure 1 shows a partial schematic view of a machine for bending tubes.
les figures 2a, 2b, 2c et 2d représentent des vues schématiques partielles de la même machine lors de phases successives différentes d'une opération de cambrage.Figures 2a, 2b, 2c and 2d show partial schematic views of the same machine during different successive phases of a bending operation.
La figure 1 représente la tête de cambrage 1 d'une machine selon l'invention, sur laquelle est mis en place un tube 2 maintenu par un moyen d' aménage, non représenté, qui consiste en un élément apte à maintenir le tube 2 et à 1 ' entraîner axialement dans un sens comme dans 1 ' autre comme le matérialise la double flèche X.FIG. 1 represents the bending head 1 of a machine according to the invention, on which is placed a tube 2 held by a fitting means, not shown, which consists of an element capable of holding the tube 2 and to drive it axially in one direction as in the other as shown by the double arrow X.
La tête de cambrage 1 porte une forme 3 et une contre forme 4 , entre lesquelles passe le tube 2.The bending head 1 has a shape 3 and a counter shape 4, between which the tube 2 passes.
La forme 3 consiste en un disque présentant un pan coupé 30 disposé selon une corde, tandis que son bord courbe 31 comporte une gorge 32, dont n'est représenté par transparence que le fond 33, de section transversale semi-circulaire de rayon égal à celui du tube 2. La contre-forme 4 consiste en un galet monté fou sur un arbre 40, et qui comporte en périphérie une gorge 41, dont n'est représenté par transparence que le fond 42, de section transversale semi-circulaire également de même rayon que celui du tube 2.Form 3 consists of a disc having a cutaway 30 arranged along a cord, while its curved edge 31 has a groove 32, of which only the bottom 33 is shown by transparency, of semi-circular cross section with radius equal to that of tube 2. The counterform 4 consists of a roller mounted idle on a shaft 40, and which has a groove 41 at the periphery, of which only the bottom 42 is shown by transparency, of semi-circular cross section also of the same radius as that of the tube 2.
La forme 3 est montée en rotation sur la tête de cambrage 1 par l'intermédiaire d'un arbre 34 apte à être entraîné en rotation par un moyen moteur, non représenté, en sorte de faire tourner la forme 3 axialement par rapport à la tête de cambrage 1, dans 1 'un ou 1 ' autre sens , selon la double flèche Y .The form 3 is mounted in rotation on the bending head 1 by means of a shaft 34 capable of being driven in rotation by a motor means, not shown, so as to rotate the form 3 axially with respect to the head camber 1, in one or the other direction, according to the double arrow Y.
La tête de cambrage 1 est portée par un bras, non représenté, sur lequel elle peut, par l'intermédiaire de moyens moteurs, également non représentés, pivoter coaxialement à l'axe de rotation de la forme 3 , dans un sens comme dans 1 ' autre , selon la double flèche Z .The bending head 1 is carried by an arm, not shown, on which it can, by means of motor means, also not shown, pivot coaxially to the axis of rotation of the form 3, in a direction as in 1 other, according to the double arrow Z.
D ' autre part, le bras , non représenté , qui porte la tête de cambrage 1, est mobile par rapport au moyen d' aménage du tube 2, en sorte qu'il décrive une trajectoire passant par les arbres 34 et 40. Dans le mode de réalisation représenté, cette trajectoire, qui est matérialisée par la double flèche R, est courbe, elle résulte du pivotement du bras. On notera que cette trajectoire peut être, de préférence, rectiligne, ce qui peut toutefois rendre plus complexe la construction de la machine.On the other hand, the arm, not shown, which carries the bending head 1, is movable relative to the fitting means of the tube 2, so that it describes a trajectory passing through the shafts 34 and 40. In the embodiment shown, this trajectory, which is materialized by the double arrow R, is curved, it results from the pivoting of the arm. It should be noted that this trajectory can preferably be rectilinear, which can however make the construction of the machine more complex.
Les dimensions de la forme 3 et de la contre-forme 4 , leur entraxe, ainsi que la hauteur de la corde selon laquelle est réalisé le pan coupé 30, sont tels que, lorsque le pan coupé 30 est au droit de la contre forme 4, il subsiste entre la forme 3 et la contre-forme 4 un espace au moins égal au diamètre du tube 2.The dimensions of the form 3 and the counter-form 4, their center distance, as well as the height of the rope according to which the cutaway 30 is made, are such that, when the cutaway 30 is in line with the counter-shape 4 , there remains between the form 3 and the counter-form 4 a space at least equal to the diameter of the tube 2.
En référence maintenant aux figures 2a, 2b, 2c et 2d, on peut voir différentes phases d'une opération de cambrage du tube 2, sachant que la figure 1 représente une phase préalable où le pan coupé 30 est au droit de la contre-forme 4 et la tête de cambrage 1 est positionnée de manière que le tube 2 vienne au contact du pan coupé 30.Referring now to FIGS. 2a, 2b, 2c and 2d, we can see different phases of a bending operation of the tube 2, knowing that FIG. 1 represents a preliminary phase where the cutaway 30 is in line with the counterform 4 and the bending head 1 is positioned so that the tube 2 comes into contact with the cutaway 30.
Dans un but de clarté, les différents sens de rotation Y, Z et R seront affectés d'un indice A ou B selon qu'ils coïncident avec, respectivement, le sens horaire ou contrahoraire .For the sake of clarity, the different directions of rotation Y, Z and R will be assigned an index A or B depending on whether they coincide with, respectively, the clockwise or counterclockwise direction.
Sur la figure 2a, par un mouvement de la tête de cambrage 1 dans le sens RB, le fond 42 de la gorge 41 de la contre-forme 4 est amené au contact du tube 2.In FIG. 2a, by a movement of the bending head 1 in the direction R B , the bottom 42 of the groove 41 of the counterform 4 is brought into contact with the tube 2.
La phase suivante, représentée sur la figure 2b, consiste à faire tourner la forme 3 selon YA en sorte que le tube 2, qui est en position de blocage dans le sens axial, soit engagé dans la gorge 32 , puis à bloquer la forme 3 dans cette position par rapport à la tête de cambrage 1.The next phase, represented in FIG. 2b, consists in rotating the form 3 along Y A so that the tube 2, which is in the locking position in the axial direction, is engaged in the groove 32, then in blocking the form 3 in this position relative to the bending head 1.
Le tube 2 est ainsi enserré entre la forme 3 et la contre-forme 4, dans les gorges de celles-ci respectivement 32 et 41. Les gorges 32 et 41 sont de préférence semi-circulaires, et d'un diamètre égal à celui du tube 2 , en sorte qu 'il s ' opère un contact étroit entre le tube 2 et les fonds 33 et 42 des gorges , respectivement 32 et 41.The tube 2 is thus clamped between the form 3 and the counter-form 4, in the grooves thereof 32 and 41 respectively. The grooves 32 and 41 are preferably semi-circular, and of a diameter equal to that of the tube 2, so that there is a close contact between the tube 2 and the bottoms 33 and 42 of the grooves, respectively 32 and 41.
Dans ce cas, la profondeur des gorges 32 et 41 est égale au rayon du tube 2 , et la hauteur de la corde selon laquelle est réalisé le pan coupé 30 est égale au diamètre du tube.In this case, the depth of the grooves 32 and 41 is equal to the radius of the tube 2, and the height of the cord along which the cutaway 30 is made is equal to the diameter of the tube.
En référence maintenant à la figure 2c, on peut voir que la rotation de la tête de cambrage 1 dans le sens ZB, entraîne la contre-forme 4 en rotation coaxialement à la forme 3, laquelle demeure dans la position prise lors de la phase précédente. Le déplacement de la contre-forme 4 autour de la forme 3 a pour conséquence 1 ' enroulement du tube 2 sur cette dernière . L ' immobilité relative de la forme 3 est obtenue de différentes manières selon l'architecture de la tête de cambrage 1.Referring now to FIG. 2c, it can be seen that the rotation of the bending head 1 in the direction Z B , drives the counter-form 4 in rotation coaxially with the form 3, which remains in the position taken during the phase previous. The displacement of the counterform 4 around the form 3 results in the winding of the tube 2 on the latter. The relative immobility of the form 3 is obtained in different ways depending on the architecture of the bending head 1.
Ainsi , si les moyens moteurs qui entraînent la forme 3 sont portés par la tête de cambrage 1 , la rotation dans le sens ZB doit être accompagnée d'une rotation inverse compensatrice de la forme 3 dans le sens YA.Thus, if the motor means which drive the form 3 are carried by the bending head 1, the rotation in the direction Z B must be accompanied by a compensating reverse rotation of the form 3 in the direction Y A.
Par contre, si la contre-forme 4 est montée en rotation sur 1 ' arbre 34 qui porte la forme 3 , ce dernier peut être maintenu fixe pendant le déplacement de la contre-forme 4.On the other hand, if the counter-form 4 is mounted in rotation on the shaft 34 which carries the form 3, the latter can be kept fixed during the movement of the counter-form 4.
On notera que dans une variante, il est possible de cambrer le tube 2 en l'immobilisant sur la forme 3 par l'intermédiaire de la contre-forme 4 , qui dans ce cas peut ne pas être un galet mais un moyen de blocage tel qu'un bloc presseur par exemple, et en combinant d'une part une rotation de la tête de cambrage 1 selon ZB synchronisée à une rotation selon YB de la forme 3 en l'ayant au préalable fait tourner selon YA pour ne pas enrouler le tube 2 sur le pan coupé 30 , et d' autre part un mouvement proportionnel d'avance du tube 2 selon X.It will be noted that in a variant, it is possible to arch the tube 2 by immobilizing it on the form 3 by means of the counter-form 4, which in this case may not be a roller but a locking means such than a pressing block for example, and by combining on the one hand a rotation of the bending head 1 according to Z B synchronized with a rotation according to Y B of the form 3 having previously rotated it according to Y A so as not to not wind the tube 2 on the cutaway 30, and on the other hand a proportional advance movement of the tube 2 along X.
Cette variante permet notamment de cambrer un tube à proximité de son extrémité, ou à proximité d'un cambrage ou d'un refoulement.This variant makes it possible in particular to bend a tube close to its end, or near a bend or a discharge.
En référence maintenant à la figure 2d, on peut voir que, après le cambrage du tube 2, ce dernier est déplacé axialement, la contre-forme 4 a été ramenée dans sa position de départ par une rotation dans le sens ZA, la forme 3 a tourné dans le sens YB pour ramener le pan coupé 30 parallèlement au tube 2 , et la tête de cambrage 1 a été déplacée dans le sens RA afin que le pan coupé 30 vienne au contact du tube 2 et que celui-ci sorte de la gorge 41, en sorte que le tube 2 puisse, après coupage, être dégagé latéralement. Referring now to FIG. 2d, it can be seen that, after bending the tube 2, the latter is moved axially, the counterform 4 has been brought back to its starting position by a rotation in the direction Z A , the shape 3 has turned in direction Y B to bring the cutaway 30 parallel to the tube 2, and the bending head 1 has been moved in the direction R A so that the cutaway 30 comes into contact with the tube 2 and that the latter sort of groove 41, so that the tube 2 can, after cutting, be released laterally.

Claims

REVENDICATIONS
1) Machine pour le cambrage d'un tube en série et à cadence élevée comportant une tête de cambrage (1) comprenant une forme (3) et une contre-forme (4) qui comportent en périphérie une gorge (31, 41) de section semi-circulaire, ainsi que des moyens permettant d'entraîner ladite contre-forme (4) en rotation coaxialement à ladite forme (3) de manière à entraîner le tube à cambrer (2) et à l'enrouler sur ladite forme (3), caractérisée en ce que ladite forme (3) consiste en un disque présentant un pan coupé (30) disposé selon une corde dudit disque, et en ce qu'elle comporte des moyens permettant de déplacer ladite tête de cambrage (1) par rapport à l'axe du tube (2) , selon une trajectoire (R) passant par les axes (34, 40) desdites forme (3) et contre-forme (4) , ainsi que des moyens permettant de faire tourner axialement ladite forme (3) , indépendamment du déplacement de ladite contre-forme (4) .1) Machine for bending a tube in series and at a high rate comprising a bending head (1) comprising a shape (3) and a counter-shape (4) which have a groove (31, 41) at the periphery semi-circular section, as well as means making it possible to drive said counter-form (4) in rotation coaxially with said form (3) so as to drive the tube to be bent (2) and to wind it on said form (3 ), characterized in that said shape (3) consists of a disc having a cutaway (30) arranged along a cord of said disc, and in that it comprises means making it possible to move said bending head (1) relative to the axis of the tube (2), along a path (R) passing through the axes (34, 40) of said form (3) and counterform (4), as well as means making it possible to rotate said form ( 3), independently of the displacement of said counterform (4).
2) Machine selon la revendication 1, caractérisée en ce que les moyens permettant de déplacer la tête de cambrage (1) par rapport au tube (2) , entraînent celle-ci selon une trajectoire rectiligne .2) Machine according to claim 1, characterized in that the means for moving the bending head (1) relative to the tube (2), drive the latter according to a straight path.
3) Machine selon la revendication 1, caractérisée en ce que les moyens permettant de déplacer ladite tête de cambrage (1) par rapport au tube (2) entraînent celle-ci selon une trajectoire courbe (R) .3) Machine according to claim 1, characterized in that the means for moving said bending head (1) relative to the tube (2) drive the latter along a curved path (R).
4) Machine selon l'une quelconque des revendications précédentes, caractérisée en ce que la contre-forme (4) consiste en un galet.4) Machine according to any one of the preceding claims, characterized in that the counter-form (4) consists of a roller.
5) Machine selon l'une quelconque des revendications précédentes, caractérisée en ce que la contre-forme consiste en un bloc presseur. 6) Machine selon l'une quelconque des revendications précédentes , caractérisée en ce que les moyens permettant de déplacer la tête de cambrage (1) par rapport au tube (2) , et les moyens permettant de faire tourner axialement la forme (3) , consistent en des moteurs pas à pas commandés numériquement.5) Machine according to any one of the preceding claims, characterized in that the counterform consists of a pressure block. 6) Machine according to any one of the preceding claims, characterized in that the means making it possible to move the bending head (1) relative to the tube (2), and the means making it possible to rotate the form (3), consist of digitally controlled stepper motors.
7) Machine selon l'une quelconque des revendications 1, 3, 4 et 5, caractérisée en ce que la tête de cambrage (1) est portée par un bras mobile en pivotement, sur lequel elle est mobile en pivotement coaxialement à la forme (3) , cette dernière étant montée mobile en pivotement axial sur ladite tête de cambrage (D. 7) Machine according to any one of claims 1, 3, 4 and 5, characterized in that the bending head (1) is carried by a pivotally movable arm, on which it is pivotally movable coaxially to the shape ( 3), the latter being movably mounted in axial pivoting on said bending head (D.
EP01919545A 2000-03-23 2001-03-22 Tube bending machine Expired - Lifetime EP1311356B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0003706A FR2806647B1 (en) 2000-03-23 2000-03-23 TUBE BENDING MACHINE
FR0003706 2000-03-24
PCT/FR2001/000873 WO2001070425A1 (en) 2000-03-23 2001-03-22 Tube bending machine

Publications (2)

Publication Number Publication Date
EP1311356A1 true EP1311356A1 (en) 2003-05-21
EP1311356B1 EP1311356B1 (en) 2005-06-01

Family

ID=8848419

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EP01919545A Expired - Lifetime EP1311356B1 (en) 2000-03-23 2001-03-22 Tube bending machine

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US (1) US6782728B2 (en)
EP (1) EP1311356B1 (en)
AT (1) ATE296692T1 (en)
AU (1) AU4662401A (en)
BR (1) BR0109486A (en)
DE (1) DE60111237T2 (en)
ES (1) ES2243472T3 (en)
FR (1) FR2806647B1 (en)
WO (1) WO2001070425A1 (en)

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CN112372318B (en) * 2020-11-05 2021-10-15 湖南翰坤实业有限公司 Bending forming device for rectangular frame

Also Published As

Publication number Publication date
FR2806647B1 (en) 2004-06-11
US20030037585A1 (en) 2003-02-27
ES2243472T3 (en) 2005-12-01
BR0109486A (en) 2003-06-10
FR2806647A1 (en) 2001-09-28
DE60111237D1 (en) 2005-07-07
US6782728B2 (en) 2004-08-31
AU4662401A (en) 2001-10-03
DE60111237T2 (en) 2006-03-16
WO2001070425A1 (en) 2001-09-27
EP1311356B1 (en) 2005-06-01
ATE296692T1 (en) 2005-06-15

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