EP0445044A1 - Bending machine with two bending heads - Google Patents
Bending machine with two bending heads Download PDFInfo
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- EP0445044A1 EP0445044A1 EP91420013A EP91420013A EP0445044A1 EP 0445044 A1 EP0445044 A1 EP 0445044A1 EP 91420013 A EP91420013 A EP 91420013A EP 91420013 A EP91420013 A EP 91420013A EP 0445044 A1 EP0445044 A1 EP 0445044A1
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- European Patent Office
- Prior art keywords
- bending
- tube
- head
- heads
- machine
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- 238000005452 bending Methods 0.000 title claims abstract description 134
- 238000000034 method Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 240000008042 Zea mays Species 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000009347 mechanical transmission Effects 0.000 description 1
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Classifications
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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
- B21D7/02—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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21F—WORKING OR PROCESSING OF METAL WIRE
- B21F1/00—Bending wire other than coiling; Straightening wire
Definitions
- the present invention relates to a machine for bending tubes. More particularly, this invention relates to a machine provided with two bending heads, movable one and the other in the initial direction of the tube to be bent, and each equipped with a bending tool working in a plane of bending whose orientation is modifiable by the action of control means and may be different from the orientation of the bending plane in which the other bending head works.
- the two bending heads are usually arranged on either side of a fixed or rotating central clamp, provided for holding the tube to be bent.
- the two bending heads working simultaneously or alternately, are gradually brought closer to the central clamp, each bending head making it possible to make several successive bends on the corresponding half of tube, the different bends being able to locate in separate planes from each other.
- bending machines of this kind make it possible to produce multiple bends with high efficiency, on tubes of relatively great length, and thus these machines find applications in particular in the field of the automobile industry, for example for the production of conduits for braking circuits.
- the present invention aims to eliminate these drawbacks by providing a machine for bending tubes of the type under consideration, effectively making it possible to produce very close bends in the median region of the tube, while always ensuring correct immobilization of the latter.
- the subject of the invention is a machine for bending tubes with two bending heads, of the type specified in the introduction, in which at least one of the two bending heads is provided to be movable also in a plane perpendicular to the initial direction of the tube to be bent, and carries means for pinching said tube, offset with respect to the longitudinal axis of the bending head, so that this bending head can be moved away from the initial axis of the tube to be bent , the associated pinching means then coming in this axis and being able to temporarily hold the tube to be bent there.
- the machine for bending tubes according to the invention is devoid of central clamp, without this affecting its operation: its two bending heads are actuated alternately, one of the heads producing an elbow on the tube in the plane of desired bending while the other head maintains the same tube.
- the two bending heads reach the median region of the tube, one of the heads can slip away, for example behind this tube, so that it no longer constitutes an obstacle to an additional advance of the other head bending, for the realization of a last bend which can be very close to that previously formed.
- the tube is held tight by the clamping means carried by the clamping head which has been moved away from the initial axis of the tube.
- the two bending heads of the machine are both provided in a plane perpendicular to the initial direction of the tube to be bent, so as to be able to be separated each from the initial axis of the tube to be bent, and each bending head carries means for pinching said tube, offset with respect to the longitudinal axis of this head.
- each bending head is carried by the free end of a support arm pivotally mounted, about an axis parallel to the initial direction of the tube to be bent, on a part of a carriage which can itself be moved in this direction, and motorized control means are provided for actuating the pivoting support arm, so as to separate the corresponding bending head from the initial axis of the tube to be bent, or to return said bending head to this axis.
- the motorized control means can here be constituted by a jack, mounted between a part of the carriage and the pivoting support arm of the bending head.
- each bending head is itself provided, towards its end situated on the side of its bending tool, with a support rod substantially perpendicular to the initial direction of the tube to be bent, this support rod being provided at its free end with the aforementioned clamping means.
- the latter can be produced in the form of a clamp with two opposite jaws, pivoting symmetrically under the action of motorized control means. The distance between the clamp and the longitudinal axis of the bending head defines the distance by which this head must be offset, to bring the clamp into its active position, where it can temporarily hold the tube to be bent.
- the pinching means can be fixedly mounted on the associated bending head. These means can also be provided retractable, so as not to constitute obstacles when they do not intervene, and in particular so as not to hinder the movement of the tube during bending.
- the machine for bending tubes shown as a whole in Figure 1, comprises a bench 1 elongated in the horizontal direction.
- the bench 1 comprises two parallel horizontal guide columns 2 and 3, along which are movable in translation two carriages 4 and 5.
- the first carriage 4 is equipped with a gear motor 6 controlling its movement along the guide columns 2 and 3, by means of a not shown pinion which engages with a horizontal rack 7 carried by the bench 1.
- the second carriage 5 is also equipped with a geared motor 8 controlling its movement along the columns of guide 2 and 3, by means of a pinion which engages with the same rack 7.
- the first carriage 4 carries a first bending head 9, and the second carriage 5 carries a second bending head 10, the two bending heads 9 and 10 being normally positioned along the same horizontal axis 11, along which the tube is also arranged to bend 12, initially straight.
- the two bending heads 9 and 10 can be moved one and the other horizontally in the initial direction of the tube to be bent 12.
- each carriage 4 or 5 has an upwardly facing part, respectively 13 or 14. At the top of this part 13 or 14 is pivotally mounted, around a horizontal axis 15 parallel to the initial direction of the tube to be bent 12, a support arm respectively 16 or 17.
- the first bending head 9 is carried by the free end of the pivoting support arm 16 associated with the first carriage 4, and the second head bending 10 is carried by the free end of the pivoting support arm 17 associated with the second carriage 5.
- a jack 18 is mounted between the part 13 of the first carriage 4 and a point of the associated support arm 16, to control a pivoting of this support arm 16 around the axis 15, and thus move the first bending head 9 on a circular path 19, in a plane perpendicular to the initial direction of the tube to be bent 12.
- the first bending head 9 can thus be moved away from the initial axis 11 of the tube to be bent.
- another jack 20 is mounted between the part 14 of the second carriage 5 and a point of the associated support arm 17, to control a pivoting of this support arm 17 around the axis 15, and thus move the second head bending 10 on a circular path, in a plane perpendicular to the initial direction of the tube to be bent 12.
- the second bending head 10 can thus also be spaced from the initial axis 11 of the tube to be bent.
- each bending head 9 or 10 has a body with a cylindrical appearance, having a longitudinal slot 21 which allows the lateral insertion and exit of the tube to be bent 12.
- each bending head 9 or 10 At its outer end, that is to say distant from the other head, each bending head 9 or 10 comprises a bending tool of known type, essentially constituted by a forming roller 22 and by a bending roller 23, the latter being carried by a pivoting radial arm 24 and thus able to rotate around the forming roller 22. All the bending tools are mounted rotating around the longitudinal axis of the bending head 9 or 10, so as to modify the orientation of the bending plane .
- Motorized control means indicated generally at 25 in FIGS.
- the body of the first bending head 9 is provided, on the side of the bending tool, with a support rod 26 substantially perpendicular to the longitudinal axis of this head, as well as to the direction of the support arm 16 of this head 9. At its free end, the support rod 26 is provided with clamping means, generally designated by 27.
- the body of the second bending head 10 is provided, on the side of the bending tool, with a support rod 28 substantially perpendicular to the longitudinal axis of this head, as well as to the direction of the support arm 17 of this head 10.
- the support rod 28 is provided with pinching means, generally designated by 29.
- the clamping means 27 or 29 can be produced, as shown in particular in FIG. 4, in the form of a clamp with two opposite jaws 30 and 31, which can pivot symmetrically between an open position and a closed position under the action of motorized control means 32.
- the clamp is designed to grip the tube to be bent 12 between its two jaws 30 and 31.
- D denotes the distance which separates this clamp from the longitudinal axis of the bending head.
- the bending machine further comprises an automatic handling device, generally designated by 32.
- the handling device 32 comprises a support leg 33, fixed to the middle of the bench 1 and carrying a double loading arm 34, pivotally mounted about a horizontal axis 35 parallel to the initial axis 11 of the tube to be bent.
- Gripping means 36 for example magnetic, capable of retaining a tube, are provided at the ends of the arms of the double loading arm 34.
- the waiting tubes 12 rest on an inclined plane 37.
- the double loading arm 34 picks up the tube 12 located at the lowest point of the inclined plane 37, and it brings this tube, by a movement in an arc 38, as far as the axis 11 along which the two bending heads 9 and 10 normally move.
- These heads 9 and 10 then being spaced apart as shown in FIG. 10, and sufficiently distant from one another to allow the passage of the double loading arm 34 (or, possibly, sufficiently close to one another to allow the two loading arm to pass on either side of the two heads 9 and 10).
- the two bending heads 9 and 10 are then brought back in the axis 11 to take up the tube to be bent 12. These heads 9 and 10 are then spaced from one another, in the direction of the ends of the tube 12, and they can thus come up to the stop against end caps or nuts provided at the ends of the tube 12. Finally the double arm 34 of the handling device 32 is returned to its starting position, at the lowest point of the inclined plane 37, s' it has not been previously retracted.
- the two bending heads 9 and 10 remaining in the normal working position on the axis 11 (see FIG. 2), moved alternately one towards the other along this axis 11, to execute bends alternately on the two halves of the tube to be bent 12. While a bending head 9 or 10 bends the desired angle in the corresponding tube half, this according to a bending plane determined by the orientation of its bending tools , the other bending head 10 or 9 maintains the tube 12 in the corresponding half. One of the bending heads 9 or 10 also maintains the tube 12 during bending while the other head is moved along the axis 11. This alternative bending process can continue, until the two heads 9 and 10 arrive in close proximity to each other, as shown in Figure 5, in the middle region of the tube 12.
- FIG. 5 shows that the last two elbows, which can be produced on the tube 12 by means of the respective bending tools of the two heads 9 and 10, are then separated at least by a distance E equal to substantially twice the length of a head of bending.
- the bending roller 23 of the first head 9 for example is first brought back to the starting position (corresponding to a zero bending angle), as shown Figure 6.
- the first bending head 9 is spaced from the initial axis 11 of the tube 12, over a distance D, so that the clamping means 27 carried by this head 9 is placed in the axis 11.
- the pinching means 27 are then actuated so as to firmly hold the tube 12, in its rectilinear part located between the last two elbows formed.
- the second bending head 10 is then moved along the axis 11 in the direction of the clamping means 27, without encountering any obstacle since the first head 9 has been previously overshadowed. This additional movement is illustrated in Figure 8.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
Description
La présente invention concerne une machine à cintrer les tubes. Plus particulièrement, cette invention se rapporte à une machine pourvue de deux têtes de cintrage, déplaçables l'une et l'autre suivant la direction initiale du tube à cintrer, et équipées, chacune, d'un outillage de cintrage travaillant dans un plan de cintrage dont l'orientation est modifiable par l'action de moyens de commande et peut être différente de l'orientation du plan de cintrage dans lequel travaille l'autre tête de cintrage.The present invention relates to a machine for bending tubes. More particularly, this invention relates to a machine provided with two bending heads, movable one and the other in the initial direction of the tube to be bent, and each equipped with a bending tool working in a plane of bending whose orientation is modifiable by the action of control means and may be different from the orientation of the bending plane in which the other bending head works.
Des machines à cintrer les tubes de ce genre, et des têtes de cintrage tournantes adaptées à ces machines, sont déjà décrites par exemple dans la demande de brevet français N° 2 610 852, ou dans la demande de brevet européen N° 0 281 488 au nom de la Demanderesse.Machines for bending tubes of this kind, and rotating bending heads adapted to these machines, are already described for example in French patent application No. 2,610,852, or in European patent application No. 0 281 488 in the name of the Applicant.
Dans de telles machines à cintrer connues, les deux têtes de cintrage sont habituellement disposées de part et d'autre d'une pince centrale fixe ou tournante, prévue pour le maintien du tube à cintrer. Au cours d'un processus de cintrage, les deux têtes de cintrage, travaillant simultanément ou alternativement, sont rapprochées progressivement de la pince centrale, chaque tête de cintrage permettant de réaliser plusieurs coudes successifs sur la moitié de tube correspondante, les différents coudes pouvant se situer dans des plans distincts les uns des autres. On comprend que les machines à cintrer de ce genre permettent de réaliser des coudes multiples avec un rendement élevé, sur des tubes de relativement grande longueur, et ainsi ces machines trouvent des applications notamment dans le domaine de l'industrie automobile, par exemple pour la réalisation de conduits destinés à des circuits de freinage.In such known bending machines, the two bending heads are usually arranged on either side of a fixed or rotating central clamp, provided for holding the tube to be bent. During a bending process, the two bending heads, working simultaneously or alternately, are gradually brought closer to the central clamp, each bending head making it possible to make several successive bends on the corresponding half of tube, the different bends being able to locate in separate planes from each other. It is understood that bending machines of this kind make it possible to produce multiple bends with high efficiency, on tubes of relatively great length, and thus these machines find applications in particular in the field of the automobile industry, for example for the production of conduits for braking circuits.
Toutefois, ces machines à cintrer les tubes conservent encore des inconvénients qui limitent leurs possibilités d'utilisation. En particulier, compte tenu de la présence habituelle de la pince centrale, il reste difficile, voire impossible, de réaliser des coudes rapprochés dans la région médiane du tube. En effet, cette région médiane est serrée dans la pince centrale, qui constitue un obstacle limitant le mouvement de translation des deux têtes de cintrage dans le sens de leur rapprochement. Ainsi, à moins de prévoir des artifices particuliers, la distance minimale entre deux coudes, dans la région médiane du tube, est égale au moins au double de la longueur d'une tête de cintrage, augmenté de la largeur de la pince centrale.However, these machines for bending tubes still retain drawbacks which limit their possibilities of use. In particular, taking into account the usual presence of the central clamp, it remains difficult, if not impossible, to produce close bends in the central region of the tube. Indeed, this central region is clamped in the central clamp, which constitutes an obstacle limiting the translational movement of the two bending heads in the direction of their approximation. Thus, unless provision is made for special devices, the minimum distance between two elbows, in the central region of the tube, is at least twice the length of a bending head, increased by the width of the central clamp.
La simple suppression de cette pince centrale ne peut constituer une solution valable au problème posé ci-dessus, car il reste nécessaire de maintenir le tube lors de l'exécution du ou des derniers coudes dans sa région médiane.The simple removal of this central clamp cannot constitute a valid solution to the problem posed above, because it remains necessary to hold the tube during the execution of the last bend (s) in its middle region.
La présente invention vise à éliminer ces inconvénients, en fournissant une machine à cintrer les tubes du genre considéré, permettant effectivement la réalisation de coudes très rapprochés dans la région médiane du tube, en assurant toujours une immobilisation correcte de ce dernier.The present invention aims to eliminate these drawbacks by providing a machine for bending tubes of the type under consideration, effectively making it possible to produce very close bends in the median region of the tube, while always ensuring correct immobilization of the latter.
A cet effet, l'invention a pour objet une machine à cintrer les tubes à deux têtes de cintrage, du genre précisé en introduction, dans laquelle l'une au moins des deux têtes de cintrage est prévue mobile également dans un plan perpendiculaire à la direction initiale du tube à cintrer, et porte des moyens de pinçage dudit tube, décalés par rapport à l'axe longitudinal de la tête de cintrage, de telle sorte que cette tête de cintrage puisse être écartée de l'axe initial du tube à cintrer, les moyens de pinçage associés venant alors dans cet axe et étant aptes à y maintenir temporairement le tube à cintrer.To this end, the subject of the invention is a machine for bending tubes with two bending heads, of the type specified in the introduction, in which at least one of the two bending heads is provided to be movable also in a plane perpendicular to the initial direction of the tube to be bent, and carries means for pinching said tube, offset with respect to the longitudinal axis of the bending head, so that this bending head can be moved away from the initial axis of the tube to be bent , the associated pinching means then coming in this axis and being able to temporarily hold the tube to be bent there.
Ainsi, la machine à cintrer les tubes selon l'invention est dépourvue de pince centrale, sans que cela nuise à son fonctionnement : ses deux têtes de cintrage sont actionnées alternativement, l'une des têtes réalisant un coude sur le tube dans le plan de cintrage désiré tandis que l'autre tête assure le maintien du même tube. Lorsque les deux têtes de cintrage parviennent dans la région médiane du tube, l'une des têtes peut s'éclipser par exemple en arrière de ce tube, de sorte qu'elle ne constitue plus un obstacle à une avance supplémentaire de l'autre tête de cintrage, pour la réalisation d'un dernier coude pouvant être très proche de celui précédemment formé. Tandis que le dernier coude est réalisé par cette autre tête de cintrage, le tube est maintenu serré par les moyens de pinçage portés par la tête de pinçage qui a été écartée de l'axe initial du tube.Thus, the machine for bending tubes according to the invention is devoid of central clamp, without this affecting its operation: its two bending heads are actuated alternately, one of the heads producing an elbow on the tube in the plane of desired bending while the other head maintains the same tube. When the two bending heads reach the median region of the tube, one of the heads can slip away, for example behind this tube, so that it no longer constitutes an obstacle to an additional advance of the other head bending, for the realization of a last bend which can be very close to that previously formed. While the last bend is produced by this other bending head, the tube is held tight by the clamping means carried by the clamping head which has been moved away from the initial axis of the tube.
De préférence, les deux têtes de cintrage de la machine sont prévues l'une et l'autre dans un plan perpendiculaire à la direction initiale du tube à cintrer, de manière à pouvoir être écartées chacune de l'axe initial du tube à cintrer, et chaque tête de cintrage porte des moyens de pinçage dudit tube, décalés par rapport à l'axe longitudinal de cette tête.Preferably, the two bending heads of the machine are both provided in a plane perpendicular to the initial direction of the tube to be bent, so as to be able to be separated each from the initial axis of the tube to be bent, and each bending head carries means for pinching said tube, offset with respect to the longitudinal axis of this head.
Selon un mode de réalisation de l'invention, chaque tête de cintrage est portée par l'extrémité libre d'un bras-support monté pivotant, autour d'un axe parallèle à la direction initiale du tube à cintrer, sur une partie d'un chariot déplaçable lui-même suivant cette direction, et des moyens de commande motorisés sont prévus pour actionner le bras-support pivotant, de manière à écarter la tête de cintrage correspondante de l'axe initial du tube à cintrer, ou à ramener ladite tête de cintrage sur cet axe. Les moyens de commande motorisés peuvent être ici constitués par un vérin, monté entre une partie du chariot et le bras-support pivotant de la tête de cintrage.According to one embodiment of the invention, each bending head is carried by the free end of a support arm pivotally mounted, about an axis parallel to the initial direction of the tube to be bent, on a part of a carriage which can itself be moved in this direction, and motorized control means are provided for actuating the pivoting support arm, so as to separate the corresponding bending head from the initial axis of the tube to be bent, or to return said bending head to this axis. The motorized control means can here be constituted by a jack, mounted between a part of the carriage and the pivoting support arm of the bending head.
Dans une forme d'exécution de l'invention, chaque tête de cintrage est elle-même pourvue, vers son extrémité située du côté de son outillage de cintrage, d'une tige-support sensiblement perpendiculaire à la direction initiale du tube à cintrer, cette tige-support étant munie à son extrémité libre des moyens de pinçage précités. Ces derniers sont réalisables sous la forme d'une pince à deux mâchoires opposées, pivotantes symétriquement sous l'action de moyens de commande motorisés. La distance entre la pince et l'axe longitudinal de la tête de cintrage définit la distance selon laquelle cette tête doit être décalée, pour amener la pince dans sa position active, où elle peut maintenir temporairement le tube à cintrer.In one embodiment of the invention, each bending head is itself provided, towards its end situated on the side of its bending tool, with a support rod substantially perpendicular to the initial direction of the tube to be bent, this support rod being provided at its free end with the aforementioned clamping means. The latter can be produced in the form of a clamp with two opposite jaws, pivoting symmetrically under the action of motorized control means. The distance between the clamp and the longitudinal axis of the bending head defines the distance by which this head must be offset, to bring the clamp into its active position, where it can temporarily hold the tube to be bent.
Les moyens de pinçage peuvent être montés fixes sur la tête de cintrage associée. Ces moyens peuvent aussi être prévus escamotables, pour ne pas constituer des obstacles lorsqu'ils n'interviennent pas, et notamment pour ne pas gêner le débattement du tube en cours de cintrage.The pinching means can be fixedly mounted on the associated bending head. These means can also be provided retractable, so as not to constitute obstacles when they do not intervene, and in particular so as not to hinder the movement of the tube during bending.
De toute façon, l'invention sera mieux comprise à l'aide de la description qui suit, en référence au dessin schématique annexé représentant, à titre d'exemple non limitatif, une forme de réalisation de cette machine à cintrer les tubes :
- Figure 1 est une vue d'ensemble, en perspective, d'une machine à cintrer les tubes à deux têtes de cintrage, conforme à la présente invention ;
- Figure 2 est une vue en bout, avec coupe partielle, de la machine de figure 1, montrant une tête de cintrage en position normale de travail ;
- Figure 3 est une vue de côté d'une tête de cintrage de cette machine ;
- Figure 4 est une vue en bout de la tête de cintrage de figure 3 ;
- Figures 5,6,7,8 et 9 sont des schémas illustrant le fonctionnement de la machine, pour la réalisation de coudes rapprochés dans la région médiane d'un tube ;
- Figure 10 est une vue en bout similaire à figure 2, mais montrant la tête de cintrage en position écartée de l'axe initial du tube à cintrer.
- Figure 1 is an overall perspective view of a machine for bending tubes with two bending heads, according to the present invention;
- Figure 2 is an end view, partly in section, of the machine of Figure 1, showing a bending head in the normal working position;
- Figure 3 is a side view of a bending head of this machine;
- Figure 4 is an end view of the bending head of Figure 3;
- Figures 5,6,7,8 and 9 are diagrams illustrating the operation of the machine, for the production of close bends in the middle region of a tube;
- Figure 10 is an end view similar to Figure 2, but showing the bending head in the position away from the initial axis of the tube to be bent.
La machine à cintrer les tubes, représentée dans son ensemble sur la figure 1, comprend un banc 1 allongé dans le sens horizontal. Le banc 1 comporte deux colonnes de guidage horizontales parallèles 2 et 3, le long desquelles sont déplaçables en translation deux chariots 4 et 5. Le premier chariot 4 est équipé d'un moto-réducteur 6 commandant son déplacement le long des colonnes de guidage 2 et 3, par l'intermédiaire d'un pignon non représenté qui vient en prise avec une crémaillère horizontale 7 portée par le banc 1. Le second chariot 5 est aussi équipé d'un moto-réducteur 8 commandant son déplacement le long des colonnes de guidage 2 et 3, par l'intermédiaire d'un pignon qui vient en prise avec la même crémaillère 7.The machine for bending tubes, shown as a whole in Figure 1, comprises a bench 1 elongated in the horizontal direction. The bench 1 comprises two parallel horizontal guide columns 2 and 3, along which are movable in translation two carriages 4 and 5. The first carriage 4 is equipped with a gear motor 6 controlling its movement along the guide columns 2 and 3, by means of a not shown pinion which engages with a horizontal rack 7 carried by the bench 1. The second carriage 5 is also equipped with a geared motor 8 controlling its movement along the columns of guide 2 and 3, by means of a pinion which engages with the same rack 7.
Le premier chariot 4 porte une première tête de cintrage 9, et le second chariot 5 porte une seconde tête de cintrage 10, les deux têtes de cintrage 9 et 10 étant normalement positionnées suivant un même axe horizontal 11, selon lequel est aussi disposé le tube à cintrer 12, initialement rectiligne. Ainsi, par le déplacement des chariots respectifs 4 et 5, les deux têtes de cintrage 9 et 10 sont déplaçables l'une et l'autre horizontalement suivant la direction initiale du tube à cintrer 12.The first carriage 4 carries a
Plus particulièrement, et en se référant aussi à la figure 2, chaque chariot 4 ou 5 comporte une partie tournée vers le haut, respectivement 13 ou 14. Au sommet de cette partie 13 ou 14 est monté pivotant, autour d'un axe horizontal 15 parallèle à la direction initiale du tube à cintrer 12, un bras-support respectivement 16 ou 17. La première tête de cintrage 9 est portée par l'extrémité libre du bras-support pivotant 16 associé au premier chariot 4, et la seconde tête de cintrage 10 est portée par l'extrémité libre du bras-support pivotant 17 associé au second chariot 5.More particularly, and with reference also to FIG. 2, each carriage 4 or 5 has an upwardly facing part, respectively 13 or 14. At the top of this
Un vérin 18 est monté entre la partie 13 du premier chariot 4 et un point du bras-support 16 associé, pour commander un pivotement de ce bras-support 16 autour de l'axe 15, et déplacer ainsi la première tête de cintrage 9 sur une trajectoire circulaire 19, dans un plan perpendiculaire à la direction initiale du tube à cintrer 12. La première tête de cintrage 9 peut ainsi être écartée de l'axe initial 11 du tube à cintrer.A
De même, un autre vérin 20 est monté entre la partie 14 du second chariot 5 et un point du bras-support 17 associé, pour commander un pivotement de ce bras-support 17 autour de l'axe 15, et déplacer ainsi la seconde tête de cintrage 10 sur une trajectoire circulaire, dans un plan perpendiculaire à la direction initiale du tube à cintrer 12. La seconde tête de cintrage 10 peut ainsi être, elle aussi, écartée de l'axe initial 11 du tube à cintrer.Similarly, another
En se référant aussi aux figures 3 et 4, chaque tête de cintrage 9 ou 10 possède un corps d'allure cylindrique, présentant une fente longitudinale 21 qui permet l'introduction et la sortie latérales du tube à cintrer 12. A son extrémité extérieure, c'est-à-dire éloignée de l'autre tête, chaque tête de cintrage 9 ou 10 comporte un outillage de cintrage de type connu, constitué essentiellement par un galet formeur 22 et par un galet de cintrage 23, ce dernier étant porté par un bras radial pivotant 24 et pouvant ainsi tourner autour du galet formeur 22. Tout l'outillage de cintrage est monté tournant autour de l'axe longitudinal de la tête de cintrage 9 ou 10, de manière à modifier l'orientation du plan de cintrage. Des moyens de commande motorisés, indiqués de façon globale en 25 sur les figures 2 et 3 et pouvant inclure deux moto-réducteurs et des organes de transmission mécaniques, sont prévus pour, d'une part, modifier l'orientation du plan de cintrage et, d'autre part, actionner le bras radial 24. En ce qui concerne la structure de détail d'une telle tête de cintrage tournante et de ses organes de commande, on pourra se référer utilement à la description et aux figures de la demande de brevet européen N° 0 281 488 au nom de la Demanderesse.With reference also to FIGS. 3 and 4, each
Le corps de la première tête de cintrage 9 est pourvu, du côté de l'outillage de cintrage, d'une tige-support 26 sensiblement perpendiculaire à l'axe longitudinal de cette tête, ainsi qu'à la direction du bras-support 16 de cette tête 9. A son extrémité libre, la tige-support 26 est munie de moyens de pinçage, désignés globalement par 27.The body of the
D'une manière symétrique, le corps de la seconde tête de cintrage 10 est pourvu, du côté de l'outillage de cintrage, d'une tige-support 28 sensiblement perpendiculaire à l'axe longitudinal de cette tête, ainsi qu'à la direction du bras-support 17 de cette tête 10. A son extrémité libre, la tige-support 28 est munie de moyens de pinçage, désignés globalement par 29.Symmetrically, the body of the
Les moyens de pinçage 27 ou 29 sont réalisables, comme le montre notamment la figure 4, sous la forme d'une pince à deux mâchoires opposées 30 et 31, qui peuvent pivoter symétriquement entre une position d'ouverture et une position de fermeture sous l'action de moyens de commande motorisés 32. La pince est conçue pour saisir le tube à cintrer 12 entre ses deux mâchoires 30 et 31. On désigne par D la distance qui sépare cette pince de l'axe longitudinal de la tête de cintrage.The clamping means 27 or 29 can be produced, as shown in particular in FIG. 4, in the form of a clamp with two
Dans l'exemple de réalisation considéré, en se référant de nouveau aux figures 1 et 2, la machine à cintrer comprend encore un dispositif de manutention automatique, désigné globalement par 32. Le dispositif de manutention 32 comprend un pied-support 33, fixé au milieu du banc 1 et portant un double bras de chargement 34, monté pivotant autour d'un axe horizontal 35 parallèle à l'axe initial 11 du tube à cintrer. Des moyens de préhension 36 par exemple magnétiques, aptes à retenir un tube, sont prévus aux extrémités des branches du double bras de chargement 34. Les tubes 12 en attente reposent sur un plan incliné 37. Le double bras de chargement 34 prélève le tube 12 situé au point le plus bas du plan incliné 37, et il amène ce tube, par un mouvement suivant un arc de cercle 38, jusque dans l'axe 11 selon lequel se déplacent normalement les deux têtes de cintrage 9 et 10. Ces têtes 9 et 10 étant alors écartées comme le montre la figure 10, et suffisamment éloignées l'une de l'autre pour permettre le passage du double bras de chargement 34 (ou, éventuellement, suffisamment proches l'une de l'autre pour permettre aux deux bras de chargement de passer de part et d'autre des deux têtes 9 et 10).In the embodiment considered, again referring to Figures 1 and 2, the bending machine further comprises an automatic handling device, generally designated by 32. The handling device 32 comprises a
Les deux têtes de cintrage 9 et 10 sont alors ramenées dans l'axe 11 pour reprendre le tube à cintrer 12. Ces têtes 9 et 10 sont ensuite éloignées l'une de l'autre, en direction des extrémités du tube 12, et elles peuvent ainsi venir jusqu'en butée contre des embouts ou des écrous prévus aux extrémités du tube 12. Enfin le double bras 34 du dispositif de manutention 32 est ramené dans sa position de départ, au point le plus bas du plan incliné 37, s'il n'a pas déjà été escamoté précédemment.The two
Ensuite, les deux têtes de cintrage 9 et 10, restant en position normale de travail sur l'axe 11 (voir figure 2), déplacées alternativement l'une en direction de l'autre suivant cet axe 11, pour exécuter des coudes alternativement sur les deux moitiés du tube à cintrer 12. Pendant qu'une tête de cintrage 9 ou 10 réalise un coude de l'angle désiré dans la moitié de tube correspondante, ceci selon un plan de cintrage déterminé par l'orientation de son outillage de cintrage, l'autre tête de cintrage 10 ou 9 assure le maintien du tube 12 dans la moitié correspondante. L'une des têtes de cintrage 9 ou 10 assure aussi le maintien du tube 12 en cours de cintrage tandis que l'autre tête est déplacée suivant l'axe 11. Ce processus de cintrage alternatif peut se poursuivre, jusqu'à ce que les deux têtes 9 et 10 parviennent à proximité immédiate l'une de l'autre, comme le montre la figure 5, dans la région médiane du tube 12.Then, the two bending
Cette figure 5 montre que les deux derniers coudes, réalisables sur le tube 12 au moyen des outillages de cintrage respectifs des deux têtes 9 et 10, sont alors séparés au minimum par une distance E égale sensiblement au double de la longueur d'une tête de cintrage.This FIG. 5 shows that the last two elbows, which can be produced on the
Pour réaliser au moins un coude supplémentaire dans la région médiane du même tube 12, le galet de cintrage 23 de la première tête 9 par exemple est d'abord ramené en position de départ (correspondant à un angle de cintrage nul), comme le montre la figure 6.To make at least one additional bend in the middle region of the
Ensuite, comme l'illustrent la figure 7 et aussi la figure 10, la première tête de cintrage 9 est écartée de l'axe initial 11 du tube 12, sur une distance D, de telle sorte que les moyens de pinçage 27 portés par cette tête 9 viennent se placer dans l'axe 11. Les moyens de pinçage 27 sont alors actionnés de manière à maintenir fermement le tube 12, dans sa partie rectiligne située entre les deux derniers coudes formés.Then, as illustrated in FIG. 7 and also in FIG. 10, the
La seconde tête de cintrage 10 est ensuite déplacée suivant l'axe 11 en direction des moyens de pinçage 27, sans rencontrer d'obstacle puisque la première tête 9 a été précédemment éclipsée. Ce mouvement supplémentaire est illustré par la figure 8.The
Enfin, un coude supplémentaire est exécuté sur le tube 12 au moyen de la seconde tête de cintrage 10, rapprochée des moyens de pinçage 27, comme le montre la figure 9. Ainsi, les deux derniers coudes réalisés sur le tube 12 sont séparés par une distance e qui est nettement inférieure à la distance E et qui peut être environ égale à la moitié de la distance E.Finally, an additional bend is made on the
Bien entendu, compte tenu de la symétrie de la machine, les rôles des deux têtes de cintrage 9 et 10 peuvent être inversés dans le processus qui vient d'être décrit.Of course, given the symmetry of the machine, the roles of the two bending
Comme il va de soi, l'invention ne se limite pas à la seule forme de réalisation de cette machine à cintrer les tubes qui a été décrite ci-dessus, à titre d'exemple ; elle en embrasse, au contraire, toutes les variantes respectant le même principe. Ainsi, l'on ne s'éloignerait pas du cadre de la présente invention en recourant à tous équivalents, notamment pour les moyens de commande des différents mouvements, ou encore en prévoyant des aménagements complémentaires, tels qu'un système d'escamotage des moyens de pinçage du tube portés par les têtes de cintrage.It goes without saying that the invention is not limited to the only embodiment of this tube bending machine which has been described above, by way of example; on the contrary, it embraces all the variants respecting the same principle. Thus, one would not depart from the scope of the present invention by using all equivalents, in particular for the means for controlling the various movements, or even by providing additional arrangements, such as a system for retracting the means pinching the tube carried by the bending heads.
Claims (8)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT91420013T ATE93421T1 (en) | 1990-01-26 | 1991-01-17 | PIPE BENDING DEVICE WITH TWO BENDING HEADS. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9001574 | 1990-01-26 | ||
FR9001574A FR2657546B1 (en) | 1990-01-26 | 1990-01-26 | TWO-HEAD BENDING TUBE BENDING MACHINE. |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0445044A1 true EP0445044A1 (en) | 1991-09-04 |
EP0445044B1 EP0445044B1 (en) | 1993-08-25 |
Family
ID=9393573
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP91420013A Expired - Lifetime EP0445044B1 (en) | 1990-01-26 | 1991-01-17 | Bending machine with two bending heads |
Country Status (9)
Country | Link |
---|---|
US (1) | US5113683A (en) |
EP (1) | EP0445044B1 (en) |
JP (1) | JPH05332A (en) |
AT (1) | ATE93421T1 (en) |
CA (1) | CA2034723A1 (en) |
DE (1) | DE69100290T2 (en) |
DK (1) | DK0445044T3 (en) |
ES (1) | ES2043454T3 (en) |
FR (1) | FR2657546B1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0554533A1 (en) * | 1992-02-03 | 1993-08-11 | YASKAWA & COMPANY. Ltd. | Wire bending apparatus |
CN102847851A (en) * | 2012-09-29 | 2013-01-02 | 无锡威华电焊机制造有限公司 | Synchronous feeding and bending device of reinforced-bar truss web-member bar |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5471857A (en) * | 1994-03-07 | 1995-12-05 | Mascotech Tubular Products, Inc. | Process for hydroforming a vehicle manifold |
IT1292692B1 (en) * | 1997-03-20 | 1999-02-11 | Schnell Spa | PROCEDURE AND MACHINE FOR AUTOMATIC BENDING OF PROFILES AND SIMILAR. |
IT1290141B1 (en) * | 1997-03-21 | 1998-10-19 | Blm Spa | MACHINE TO CURVE FILIFORM MATERIALS SUCH AS BAR TUBES OR PROFILES |
US6009737A (en) * | 1997-07-17 | 2000-01-04 | Arvin Industries, Inc. | Tube bender |
US6155091A (en) * | 1999-02-26 | 2000-12-05 | Arvin Industries, Inc. | Mandrel assembly for tube-bending apparatus |
FR2800649A1 (en) * | 1999-11-04 | 2001-05-11 | Robolix Sa | Double-headed bending machine, for bar, tube or other sections, has two bending heads vertically mounted in a common frame with shared loading and dispatch facilities |
US6230535B1 (en) * | 1999-11-18 | 2001-05-15 | Waitt/Fremont Machine L.L.C. | Wire bending apparatus |
DE102004015073B3 (en) * | 2004-03-25 | 2005-10-06 | Langenstein & Schemann Gmbh | Process for bending a workpiece, especially an antiroll bar for a motor vehicle, comprises arranging the workpiece between a bending stock having two curved bending surfaces with one bending curvature and two bending elements |
DE502007005038D1 (en) * | 2007-02-07 | 2010-10-28 | Wafios Ag | bending machine |
ATE429987T1 (en) * | 2007-03-14 | 2009-05-15 | Wafios Ag | GRIPPER DEVICE FOR GRABING AND HOLDING LONG-LONG WORKPIECES, ESPECIALLY IN BENDING MACHINES |
ATE443597T1 (en) * | 2007-06-29 | 2009-10-15 | Wafios Ag | LINEAR GUIDE |
IT1401361B1 (en) * | 2010-06-10 | 2013-07-18 | Blm Spa | TUBE BENDER MACHINE WITH AUTOMATIC LOADING SYSTEM AND METHOD FOR THE AUTOMATIC LOADING OF TUBES ON THE BENDING HEAD OF A TUBE BENDER. |
CN103632841B (en) * | 2013-12-03 | 2015-09-30 | 慈溪市宏晟机械设备有限公司 | A kind of inductance coil line end riveting molding machine |
CN113600711B (en) * | 2021-07-23 | 2023-04-11 | 上海建东科技有限公司 | Bending machine |
CN114603365B (en) * | 2022-04-01 | 2023-05-23 | 杭州富阳海翔机械有限公司 | Part processing device of carrier and process method thereof |
CN115971298A (en) * | 2022-12-14 | 2023-04-18 | 杭州格科机械有限公司 | Bending device for metal pipeline machining |
CN117600289B (en) * | 2024-01-22 | 2024-04-19 | 中国建筑第五工程局有限公司 | Forming equipment for bending and straightening steel pipe |
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FR2602160A1 (en) * | 1986-08-04 | 1988-02-05 | Latour Fils | Method and modular machine for bending metal wires |
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DE3312397A1 (en) * | 1983-04-06 | 1984-10-11 | Helmut 6230 Kriftel Zahlaus | METHOD AND DEVICE FOR BENDING ROD-SHAPED MATERIALS |
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SE8503058L (en) * | 1985-06-19 | 1986-12-20 | Asea Ab | PROCEDURE AND INSTALLATION FOR BENDING SHAPED MATERIAL |
DE3822713A1 (en) * | 1988-07-05 | 1990-01-18 | Heinz Ruhl | DEVICE FOR MACHINING ROD MATERIAL |
JPH0293920A (en) * | 1988-09-30 | 1990-04-04 | Fuji Xerox Co Ltd | Input device |
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1990
- 1990-01-26 FR FR9001574A patent/FR2657546B1/en not_active Expired - Lifetime
-
1991
- 1991-01-17 DK DK91420013.4T patent/DK0445044T3/en active
- 1991-01-17 AT AT91420013T patent/ATE93421T1/en not_active IP Right Cessation
- 1991-01-17 ES ES91420013T patent/ES2043454T3/en not_active Expired - Lifetime
- 1991-01-17 EP EP91420013A patent/EP0445044B1/en not_active Expired - Lifetime
- 1991-01-17 DE DE91420013T patent/DE69100290T2/en not_active Expired - Fee Related
- 1991-01-22 CA CA002034723A patent/CA2034723A1/en not_active Abandoned
- 1991-01-24 JP JP3006982A patent/JPH05332A/en active Pending
- 1991-01-25 US US07/645,974 patent/US5113683A/en not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2918813A1 (en) * | 1979-05-10 | 1980-11-20 | Brueninghaus Gmbh Stahlwerke | Bending machine for metal bars or tubes - has horizontally movable pillars supporting respective anvils on which workpiece is bent via rollers on lever arms |
FR2602160A1 (en) * | 1986-08-04 | 1988-02-05 | Latour Fils | Method and modular machine for bending metal wires |
EP0263607A1 (en) * | 1986-09-27 | 1988-04-13 | Langbow Limited | Bending machines |
FR2610852A1 (en) * | 1987-02-17 | 1988-08-19 | Picot Sa | TUBE BENDING MACHINE WITH TWO BENDING HEADS |
DE8908279U1 (en) * | 1989-05-11 | 1989-08-17 | Chuo Electric Mfg. Co., Ltd., Seto, Aichi | Bending machine for bending elongated materials in any direction |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0554533A1 (en) * | 1992-02-03 | 1993-08-11 | YASKAWA & COMPANY. Ltd. | Wire bending apparatus |
US5291771A (en) * | 1992-02-03 | 1994-03-08 | Yashawa & Company, Ltd. | Wire bending apparatus |
CN102847851A (en) * | 2012-09-29 | 2013-01-02 | 无锡威华电焊机制造有限公司 | Synchronous feeding and bending device of reinforced-bar truss web-member bar |
Also Published As
Publication number | Publication date |
---|---|
DE69100290D1 (en) | 1993-09-30 |
EP0445044B1 (en) | 1993-08-25 |
DK0445044T3 (en) | 1993-11-22 |
FR2657546B1 (en) | 1992-05-22 |
ES2043454T3 (en) | 1993-12-16 |
CA2034723A1 (en) | 1991-07-27 |
DE69100290T2 (en) | 1993-12-23 |
US5113683A (en) | 1992-05-19 |
ATE93421T1 (en) | 1993-09-15 |
JPH05332A (en) | 1993-01-08 |
FR2657546A1 (en) | 1991-08-02 |
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