EP0108695A1 - Automatic machine for bending thin and rectilinear metallic elements, especially metal wire, into a spatial configuration - Google Patents

Automatic machine for bending thin and rectilinear metallic elements, especially metal wire, into a spatial configuration Download PDF

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Publication number
EP0108695A1
EP0108695A1 EP83402155A EP83402155A EP0108695A1 EP 0108695 A1 EP0108695 A1 EP 0108695A1 EP 83402155 A EP83402155 A EP 83402155A EP 83402155 A EP83402155 A EP 83402155A EP 0108695 A1 EP0108695 A1 EP 0108695A1
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EP
European Patent Office
Prior art keywords
axis
folding
rotation
bending
drive mechanism
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
EP83402155A
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German (de)
French (fr)
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EP0108695B1 (en
Inventor
Michel Remy
Jean-françois Delaite
Guy Woirgard
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.)
Faurecia Sieges dAutomobile SAS
Original Assignee
Autocoussin SA
Autocoussin Industrie SA
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Publication date
Application filed by Autocoussin SA, Autocoussin Industrie SA filed Critical Autocoussin SA
Priority to AT83402155T priority Critical patent/ATE28283T1/en
Publication of EP0108695A1 publication Critical patent/EP0108695A1/en
Application granted granted Critical
Publication of EP0108695B1 publication Critical patent/EP0108695B1/en
Expired legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21FWORKING OR PROCESSING OF METAL WIRE
    • B21F1/00Bending wire other than coiling; Straightening wire
    • B21F1/006Bending wire other than coiling; Straightening wire in 3D with means to rotate the tools about the wire axis
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21FWORKING OR PROCESSING OF METAL WIRE
    • B21F1/00Bending wire other than coiling; Straightening wire
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21FWORKING OR PROCESSING OF METAL WIRE
    • B21F35/00Making springs from wire

Definitions

  • the present invention relates to an automatic machine for bending, according to a predetermined configuration, thin and straight metal elements of constant thickness such as wires, strips or tubes, this machine comprising a dispensing member through which a metal element to be bent can be moved in a forward movement in steps by means of an advance device, a folding member which is located downstream and close to the outlet of the distributor member and which can, on the one hand, by means of of a first drive mechanism, being driven by an angular rotational movement about an axis perpendicular to the direction of advance of the metal element and, on the other hand, by means of a second mechanism drive, be moved in a reciprocating movement on a rectilinear trajectory parallel to this axis, the operations of the first and second drive mechanisms being synchronized with that of the advance device according to a pr cycle determined.
  • Cambering machines of this type are currently the most efficient because of their automatic operation and the possibility that they offer of continuously bending thin and straight metal elements.
  • the succession of these movements makes it possible, first of all, to bring the folding member into lateral contact with the segment of wire emerging from the dispensing member, then to rotate it, at a certain angle, in a direction or in the other, so that it folds this segment of wire around the point of exit from the dispensing member and finally retracts it to allow the advance of the wire for the next folding cycle.
  • the degree of wire bending is a function of the angle by which the bending member is rotated, while the length of the folded wire segment is determined by the pitch of the advancing device.
  • the essential mechanical element used in the construction of a bending machine of this known type is constituted by a cylindrical bending head whose axis of symmetry is perpendicular to the direction of advance of the wire to be bent.
  • this head On its face facing the outlet of the dispensing member, this head carries the actual folding member which is rormé by a fixed finger eccentric relative to the axis of symmetry of the head; the reciprocating movement of this folding member takes place under the action of a jack which moves the entire folding head while its angular rotation is produced by a stepping motor which rotates the folding head around its axis of symmetry-In this first known machine, the particular structure of the folding member and its drive means is the cause of 'a number of disadvantages.
  • the slides which are mounted side by side on the frame of the machine comprise folding heads of different shapes cooperating with complementary counter-dies and can be oriented in any direction of space.
  • a wire placed between the folding heads of the slides and the associated counter-dies can be bent, after actuation of the slides, according to a spatial configuration which is defined by the orientation and the working stroke of the slides as well as by the shape of their folding head.
  • the present invention proposes to remedy all these drawbacks and, to do this, it relates to a cambering machine of the type specified in the preamble, which is characterized in that it further comprises means for generating a rotational movement. relative angularity between the folding member and the metallic element, around a second axis coincident with the direction of advance of the metallic element, this relative angular rotational movement being synchronized with the two other movements of the member folding and forward movement by steps of the metal element.
  • the axis of rotation of the folding member can be oriented in any direction, with respect to the metallic element inside a plane perpendicular to the direction of advance of this latest.
  • the folding member can therefore bend wires in all directions of space and the machine according to the invention is able to produce, at a high and continuous rate, wires bent according to any configuration. spatial. It can thus be observed that the cambering machine according to the invention has all the advantages of the above-mentioned first known machine for folding in a single plane, without having the disadvantages of the multiple slide machine for spatial folding.
  • the folding member is mounted for rotation about the second axis and the means for generating said relative angular movement are constituted by a third drive mechanism under the action of which the member folding can be driven by an angular rotational movement around this axis.
  • This embodiment of the bending machine according to the invention is more particularly suitable for the manufacture of articles produced by folding a continuous metallic element; each finished article being separated from the latter by a shear which acts at the outlet of the distributor member,
  • the distributor member is constituted by a cylindrical barrel of circular section whose axis of symmetry constitutes said second axis
  • the folding member consists of a folding finger mounted to slide on said rectilinear trajectory, in a support head which has an axis of symmetry constituting the first axis and which is kept in rotation around this axis inside a frame itself mounted in rotation around the distributor barrel, the first, second and third drive mechanisms acting respectively on the support head, the folding finger, and the frame.
  • this folding finger is of a very reduced weight and opposes an almost negligible inertia to the actuation of its movement mechanism.
  • its back-and-forth movement is instantaneous, which has a favorable influence on the working speed and the productivity of the bending machine according to the invention.
  • the second folding finger drive mechanism comprises a jack integral with the frame, the rod of which passes freely through the support head along the axis of rotation of the latter, the free end of this rod. being connected to the folding finger by a rotating lateral link, which allows the folding finger to rotate around the cylinder rod while being able to be moved in translation by the latter, in any angular position.
  • the first folding finger drive mechanism comprises an endless chain driven parallel to the direction of advance of the wire around two toothed wheels, one of which is fixed coaxially around the head and the other is carried by a loose shaft mounted to rotate freely on the frame parallel to the axis of rotation of the support head, one of the strands of the endless chain being connected to the free end of the rod of a jack which extends in the direction of drive of the endless chain.
  • This mode of driving the folding member in rotation has the advantage, on the one hand, of being very precise with regard to the repeatability of the folding angles and, on the other hand, of producing very low angular rotations up to 1/10 of a degree.
  • a silent endless chain is used and it is further provided that the free end of the cylinder rod is slidably mounted along a guide rail parallel to the stem.
  • the third folding finger drive mechanism comprises a large diameter toothed wheel secured to the frame and centered around the axis of rotation of the latter, this large diameter toothed wheel meshing with a small diameter toothed wheel keyed to a shaft, which is driven, via a chain drive without play, by a stepping motor.
  • the various drive mechanisms of the folding member as well as the advance device are actuated in synchronism by a programmable digital control with assisted programming.
  • the machine which is the subject of the present invention is specially designed for producing articles of folded wire in succession, by bending a continuous metal wire.
  • this is not a limiting application of this machine which, with a reduced number of structural modifications, can be used to produce articles produced by bending any other type of thin and straight metal elements, of constant thickness, such as strips or small diameter tubes.
  • This machine can also be used for bending simple segments of metallic elements of this type.
  • This straightening device consists of a number of rollers 3 mounted free to rotate on the chassis 4 of the machine and arranged in staggered rows on two parallel rows which delimit a passage for the wire 1.
  • the wire which has a certain curvature at its exit from the reel, is made rectilinear.
  • the height of the passage defined by the two rows of rollers can be adjusted by known means depending on the diameter of the wire.
  • a step advancing device 5 housed in a casing 6 which is fixed to the chassis 4 of the machine.
  • This advance device 5 consists of a movable clamp 7 and a fixed clamp 8.
  • the movable clamp 7 is slidably mounted on a cylindrical rail 9 parallel to the direction of advance of the wire 1 and is fixed to the end of the rod 10 of a jack 11 carried by the casing 6.
  • the fixed clamp 8 is in turn secured to the rail 9, near its end opposite to the jack 11.
  • the opening and closing of the two clamps 7 ei are controlled by conventional means known per se.
  • the movable clamp grasps the wire 1 which enters the casing 6 through an opening in the rear wall of the latter. Then the fixed clamp 8 being open, the movable clamp 7, moved along the rail 9 by the jack 11, advances the wire 1 over a distance determined by the stroke of the latter. The fixed gripper is then closed and the jack brings the movable gripper back to its starting position in the open position for a new wire advance cycle 1. In this way, the movable gripper 7 advances the wire 1 according to a straight path and in successive steps not necessarily identical, in the direction of the folding device 12 of the machine.
  • this folding device 12 comprises a cylindrical distributor barrel 13 of circular section, which is secured to the chassis of the machine and which extends in the extension of the advancement device 5 so as to direct the wire 1, displaced in translation by the latter, up to a movable folding member 14 which ensures the actual bending of the segment of wire emerging from the dispensing barrel, around the point of exit of the latter.
  • a shears 15 is also automatically brought, by an actuation system not shown, to the exit point of the distributor barrel to separate by section each finished article from the wire 1.
  • the longitudinal passage 17 has a diameter significantly greater than the maximum diameter that the wire passing through it can have.
  • the channel 20 of the nozzle 18 has a diameter strictly equal to that of the wire to be bent so that the latter slides without play inside the nozzle. Consequently, there must be a set of nozzles adapted to each diameter of wire to be bent.
  • the nozzle chosen is fixed to the end 19 of the barrel 13 by a screw 21 but, as a variant, it is possible to provide for the same purpose, a bayonet fixing.
  • the movable folding member 14 is carried by a frame 22 so as to be arranged opposite and very close to the outlet point of the nozzle 18.
  • the folding member 14 Under the action of a first mechanism drive, 24, the folding member 14 can be driven in an angular rotational movement about an axis Y which extends per to the direction of advance of the wire 1 in alignment with the point of outlet of the distributor barrel 13.
  • a second drive mechanism 23 makes it possible to move the folding member 14 in a reciprocating movement on a rectilinear trajectory X parallel to the axis Y.
  • the folding member 14 can be brought into lateral contact with the segment of wire leaving the barrel 13 and then bend it at a certain angle in one direction or the other around the tip of the nozzle 18. But as can easily be understood, a folding member having only these two possibilities of movement can only fold ier the wire in a plane perpendicular to its axis of rotation.
  • the frame 22 which carries the folding member 14 is rotatably mounted around the cylindrical distributor barrel 13, by means of two bearings 25 and can be driven by an angular rotation movement transmitted by a third drive mechanism which will be described later with reference to Figure 4. Therefore, the folding member 14 has a third possibility of movement which consists of an angular rotation around d 'a second axis coincident with the longitudinal axis of symmetry of the passage 17 of the barrel 13, that is to say with the direction of advance of the wire 1.
  • the member folding 14 can arch the wire 1 in all directions of space and the machine according to the invention can produce folded wires according to a spatial configuration.
  • the folding member 1 4 is constituted by a cylindrical finger mounted sliding along the path X in a support head 26 which is itself held in rotation inside the front part of the frame 22 via of two bearings 27, 28.
  • the folding finger 14 is eccentric relative to the axis of symmetry of the support head 26, which in fact constitutes the axis of rotation Y mentioned above.
  • the folding finger 14 Under the action of the second mechanism 23, the folding finger 14 can sometimes be taken out of its support head 26 for positioning against the wire 1, sometimes retracted to allow the wire 1 to advance at the end of a folding cycle. It will be observed that, by its reduced weight, the folding finger 14 opposes a practically negligible inertia to the action of the drive mechanism 23; its back-and-forth movement is therefore instantaneous, which has the consequence of increasing the working speed and the productivity of the bending machine according to the invention.
  • the drive mechanism 23 more precisely comprises a hydraulic cylinder 29 fixed to the upper wall 30 of the frame 22, in which an opening 31 is made through which the rod 32 of the cylinder is formed.
  • the actuator rod 32 passes freely through the support head 26, along the axis Y and, at its free end, opens into an interior cavity 35 of the support head where it is connected to the folding finger 14 by a rotary link 36. Thanks to this link, the finger 14 can be rotated m5 about the axis Y while being able to be moved in translation by the rod 34, whatever its angular position.
  • the first drive mechanism 24 of the folding finger 14 which can impart to it this angular rotation movement around the axis Y,. is housed in an interior cavity 33 of the frame 22.
  • this first drive mechanism 24 which firstly comprises an endless chain 37, the representation of which has been omitted for clarity in FIG. 2.
  • This endless chain 37 which is preferably a silent chain , cooperates with two toothed wheels 38, 39, one of which 38 is fixed coaxially around the support head 26 and the other 39 is carried by an idler shaft 40, held in rotation in the frame 22 so that its axis of rotation is parallel to that of the support head -
  • the two strands of the endless chain 39 are thus parallel to the direction of advance of the wire 1, and one of them is connected by a connecting link 41 , at the end of the rod 42 of a hydraulic cylinder 43 fixed to the rear face 44 of the frame 22.
  • the free end of the cylinder rod 42 is also slidably mounted by means of a bushing balls 45, along a cylindrical rail 46 parallel to the direction wire in advance and fixed by its ends to the frame 22.
  • the endless chain 39 driven in one direction or the other by the jack 43, rotates the support head 26 by an angle determined by the stroke of the jack rod, this angular rotation being transmitted to the folding finger 14 which describes an arc of a circle with the same angle in the center, around the axis Y.
  • the folding finger 14, in lateral contact with the wire 1 can bend the latter in a plane perpendicular to the axis Y, the degree of folding obtained being a direct function of the stroke of the rod of the jack 43.
  • this second drive mechanism is very precise. It makes it possible to produce very small angular rotations of the bending finger of the order of 0.1 °, which allows the latter to perform bends according to non-polygonal curves and in particular according to arcs of a circle.
  • the finger 14 exerts its folding action on the wire 1 by means of a V-shaped groove 47 which adapts to all the wire diameters.
  • the folding finger is further mounted with the rotary link 36, inside a removable cover 48 which is fixed to the rotary head, the rotary link coming to be snapped on to the free end of the rod 32 .
  • the bending plane of the wire 1 is determined, before the finger 14 comes into action by the third drive mechanism 49 which will now be described with reference to FIG. 4.
  • this third drive mechanism 49 comprises a large diameter toothed wheel 50 secured to the frame 22 and centered around the axis of rotation Z of the latter.
  • the toothed wheel 50 meshes with a toothed wheel of small diameter 51 which is keyed onto a fixed shaft 52 and which is driven by a stepping motor (of which only the shaft 54 is visible in FIG. 4), via of a silent chain transmission 53 forming a backlash without play.
  • the chain transmission 53 comprises an endless chain 55 winding around two toothed pinions 56 and 57, respectively integral with the shaft 52 of the small toothed wheel and of the motor shaft 54.
  • the endless chain 55 is further tensioned by an adjustable tension roller 58.
  • this third drive mechanism 49 a given angular displacement of the large toothed wheel 50 around the axis of rotation Z systematically orients in a desired direction, the axis of rotation Y and therefore the folding plane of wire 1, which is thus determined by the pitch of rotation of the motor.
  • the assembly constituted by the chain transmission 53, the small toothed wheel 51 and the stepping motor is housed inside a protective casing 59, which is partially open at the level of the gear of the two toothed wheels 50 and 51 and can be moved, perpendicular to their axis of rotation, for adjusting the backlash.
  • FIG. 4 also shows support pins 60 arranged in a spiral and around which the supply pipe 61 for hydraulic fluid under pressure of the jack 43 is wound during the various rotations of the wheel 50.
  • the different jacks 11, 29 and 43 of the cambering machine according to the invention are, as can be seen in FIG. 1, supplied with pressurized fluid by a hydraulic unit 62 under the control of a schematic digital console. by a square under the reference 63.
  • the motor for rotating the frame 22 as well as the device for actuating the shears 15 are also controlled by this digital control console.
  • the digital control panel contains a playback device into which a magnetic tape cassette can be inserted on which a program is pre-recorded in the form of a succession of digital instructions which. govern and synchronize the operations of the various drive mechanisms 23, 24, 49, the feed device 5 and the shear actuation device 15 of the machine according to the type of bent wire article that is wish to achieve.
  • these instructions relate, for each folding cycle, to the speed and the angle of rotation of the folding finger 14 around the two axes Y and Z, to the length and to the speed of advance of the wire, at the diameter of the latter and at the time of intervention of the shears 15.
  • the program also allows an automatic search for the origins of the various movements of the cambering machine and the management of breakdowns. It will be understood that this programmable digital control considerably increases profitability in the case of a medium or small series production since a change in the type of manufacturing requires only one replacement of a program cassette by another.
  • the program of an article can also be viewed on a standard video screen in the form of a table and the operator has the possibility of modifying any parameter of the table by the cursor of the video screen.
  • the speeds of rotation of the folding finger around the axes Y and Z can reach 277 rpm and 66 rpm respectively and that the speed of advance of the wire can go up to 1 m / s.
  • cambering machine can bend metal wires whose diameter can reach 8 mm as well as metal strips or ribbons. To fold the strips or ribbons, it is of course necessary to adapt the shape of the central passage 17 accordingly . of the distributor barrel 13 and of the channel 20 of the nozzle 18.
  • the machine according to the invention can even produce bent tubes, more particularly thanks to the very high precision of the second drive mechanism 24 of the folding finger 14, which allows a arching in a circular arc by successive keys close together.

Abstract

1. An automatic machine for curving, according to a predetermined configuration, thin rectilinear metallic elements of constant thickness of the wire, strip or tube kind, this machine including a bending device (12) which comprises a distributor member (13) through which the element to be curved (1) may be inserted to extend beyond an outlet of said distributor member, a bending member (14) which is located downstream and in in the vicinity of the outlet of the distributor member (13) and which may, by means of a first drive mechanism (24), be driven with an angular rotational movement about a first axis (Y) perpendicular to the extending direction of the element to be curved, said curving machine further comprising first driving means (5) for generating a relative stepped feeding movement between the element to be curved and the bending device (12), as well as second driving means (49) for generating a relative angular rotational movement between the bending device (12) and the element to be curved (1) about a second axis (Z) merging with the extending direction of the element to be curved, the operations of the first driving mechanism and second driving means (24, 29) being synchronized with the operation of first driving means (5), according to a predetermined cycle, said curving machine being characterized in that the bending member consists in a bending finger (14) which is associated with a second drive mechanism (23) adapted to reciprocate said bending finger along a rectilinear path (X) parallel with said first axis (Y), the bending finger being supported in a frame (22) which is mounted for rotation about said second axis (Z) and on which said second driving means (49) act.

Description

La présente invention concerne une machine automatique pour cambrer, selon une configuration prédéterminée, des éléments métalliques minces et rectilignes d'épaisseur constante du genre fils, feuillards ou tubes, cette machine comprenant un organe distributeur à travers lequel-un élément métallique à cambrer peut être déplacé selon un mouvement d'avance par pas au moyen d'un dispositif d'avance, un organe de pliage qui est situé en aval et à proximité de la sortie de l'organe distributeur et qui peut, d'une part, au moyen d'un premier mécanisme d'entraînement, être animé d'un mouvement de rotation angulaire autour d'un axe perpendiculaire à la direction d'avance de l'élément métallique et, d'autre part, au moyen d'un deuxième mécanisme d'entraînement, être déplacé selon un mouvement de va-et-vient sur une trajectoire rectiligne parallèle à cet axe, les fonctionnements des premier et deuxième mécanismes d'entraînement étant synchronisés sur celui du dispositif d'avance selon un cycle prédéterminé.The present invention relates to an automatic machine for bending, according to a predetermined configuration, thin and straight metal elements of constant thickness such as wires, strips or tubes, this machine comprising a dispensing member through which a metal element to be bent can be moved in a forward movement in steps by means of an advance device, a folding member which is located downstream and close to the outlet of the distributor member and which can, on the one hand, by means of of a first drive mechanism, being driven by an angular rotational movement about an axis perpendicular to the direction of advance of the metal element and, on the other hand, by means of a second mechanism drive, be moved in a reciprocating movement on a rectilinear trajectory parallel to this axis, the operations of the first and second drive mechanisms being synchronized with that of the advance device according to a pr cycle determined.

Les machines à cambrer de ce type sont actuellement les plus performantes en raison de leur fonctionnement automatique et de la possibilité qu'elles offrent de cambrer en continu des éléments métalliques minces et rectilignes.Cambering machines of this type are currently the most efficient because of their automatic operation and the possibility that they offer of continuously bending thin and straight metal elements.

Dans ces machines connues, dont l'utilisation est en général limitée au cambrage des fils métalliques en vue plus particulièrement de la fabri- tion d'articles en fil plié, le mouvement de rotation angulaire de l'organe de pliage intervient, à chaque cycle de pliage,entre les courses aller et retour de son mouvement de va-et-vient.In these known machines, the use of which is generally limited to the bending of the metal wires with a view more particularly to the production of folded wire articles, the angular rotation movement of the folding member occurs, at each cycle folding, between the back and forth strokes of its back and forth movement.

La succession de ces mouvements, permet tout d'abord, d'amener l'organe de pliage en contact latéral avec le segment de fil émergeant de l'organe distributeur, puis de le faire tourner, sur un certain angle, dans un sens ou dans l'autre, pour qu'il plie ce segment de fil autour du point de sortie de l'organe distributeur et enfin de le rétracter afin de permettre l'avance du fil en vue du cycle suivant de pliage. Le degré de pliage du fil est fonction de l'angle dont on fait tourner l'organe de pliage, alors que la longueur du segment de fil plié est déterminée par.le pas du dispositif d'avance.The succession of these movements makes it possible, first of all, to bring the folding member into lateral contact with the segment of wire emerging from the dispensing member, then to rotate it, at a certain angle, in a direction or in the other, so that it folds this segment of wire around the point of exit from the dispensing member and finally retracts it to allow the advance of the wire for the next folding cycle. The degree of wire bending is a function of the angle by which the bending member is rotated, while the length of the folded wire segment is determined by the pitch of the advancing device.

L'élément mécanique essentiel entrant dans la construction d'une machine à cambrer de ce type connu, est constitué par une tête cylindrique de pliage dont l'axe de symétrie est perpendiculaire à la direction d'avance du fil à cambrer. Sur sa face tournée vers la sortie de l'organe distributeur, cette tête porte l'organe de pliage proprement dit qui est rormé par un doigt fixe excentré par rapport à l'axe de symétrie de la tête ; le mouvement de va-et-vient de cet organe de pliage s'effectue sous l'action d'un vérin qui déplace la tête de pliage entière tandis que sa rotation angulaire est produite par un moteur pas-à-pas qui fait tourner la tête de pliage autour de son axe de symétrie-Dans cette première machine connue, la structure particulière de l'organe de pliage et de ses moyens d'entraînement est la cause d'un certain nombre d'inconvénients.The essential mechanical element used in the construction of a bending machine of this known type, is constituted by a cylindrical bending head whose axis of symmetry is perpendicular to the direction of advance of the wire to be bent. On its face facing the outlet of the dispensing member, this head carries the actual folding member which is rormé by a fixed finger eccentric relative to the axis of symmetry of the head; the reciprocating movement of this folding member takes place under the action of a jack which moves the entire folding head while its angular rotation is produced by a stepping motor which rotates the folding head around its axis of symmetry-In this first known machine, the particular structure of the folding member and its drive means is the cause of 'a number of disadvantages.

Le premier de ces inconvénients résulte de l'inertie importante de la tête de pliage,.qui s'oppose au déplacement en translation de cette dernière en provoquant un retard de réponse à la mise en action du vérin, retard qui est préjudiciable à la vitesse d'exécution et, par suite, à la productivité de la machine à cambrer.The first of these drawbacks results from the large inertia of the folding head, which opposes the translational movement of the latter by causing a delay in response to the actuation of the jack, a delay which is detrimental to the speed. execution and, consequently, the productivity of the bending machine.

Un autre inconvénient est inhérent au moteur d'entraînement en rotation angulaire de la tête de pliage qui n'est pas d'une précision suffisante pour certaines applications de la machine à cambrer.Another drawback is inherent in the drive motor for angular rotation of the folding head which is not of sufficient precision for certain applications of the bending machine.

Mais l'inconvénient principal de cette machine à cambrer connue, comme le montre. la description de son fonctionnement faite ci-dessus, réside dans le fait qu'elle ne peut produire que des fils dont les plis s'étendent dans un seul et même plan perpendiculaire à l'axe de rotation de l'organe de pliage. En d'autres termes, elle n'est pas adaptée pour cambrer des fils dans toutes les directions de l'espace. Or, dans de nombreux domaines d'application et, notamment dans la fabrication'des carcasses ou squelettes de sièges d'automobiles, on a besoin de fils métalliques pliés selon une configuration spatiale.But the main drawback of this known arching machine, as shown. the description of its operation made above, resides in the fact that it can only produce wires whose folds extend in a single and same plane perpendicular to the axis of rotation of the folding member. In other words, it is not suitable for bending wires in all directions of space. However, in many fields of application and, in particular in the manufacture of carcasses or skeletons of automobile seats, there is a need for metal wires bent in a spatial configuration.

Pour fabriquer de tels fils, on dispose à l'heure actuelle de machines à coulisseaux multiples. Dans ces machines, les coulisseaux qui sont montés côte à côte sur le bâti de la machine, comportent des têtes de pliage de différentes formes coopérant avec des contre-matrices complémentaires et peuvent être orientés dans n'importe quelle direction de l'espace. Ainsi un fil placé entre les têtes de pliage des coulisseaux et les contre-matrices associées, peut être cambré, après actionnement des coulisseaux, selon une configuration spatiale qui est définie par l'orientation et la course de travail des coulisseaux ainsi que par la forme de leur tête de pliage.To manufacture such wires, multiple slide machines are currently available. In these machines, the slides which are mounted side by side on the frame of the machine, comprise folding heads of different shapes cooperating with complementary counter-dies and can be oriented in any direction of space. Thus a wire placed between the folding heads of the slides and the associated counter-dies, can be bent, after actuation of the slides, according to a spatial configuration which is defined by the orientation and the working stroke of the slides as well as by the shape of their folding head.

On comprendra que cette machine à coulisseaux multiples ne présente un intérêt que pour le cambrage de fils de grande longueur.It will be understood that this multiple slide machine is only of interest for bending long wires.

En outre, sa rentabilité n'est effective que dans le cas d'une fabrication de grande série étant donné qu'à chaque fois que l'on souhaite changer la configuration ou le motif de cambrage du fil, il est nécessaire de remplacer les coulisseaux en place par des coulisseaux spécialement adaptés à la nouvelle fabrication envisagée, puis de régler le fonctionnement de ces derniers, cette double opération pouvant prendre de deux à trois heures. A cela s'ajoute le fait que cette machine à coulisseaux multiples . nécessite un outillage d'un coût très élevé.In addition, its profitability is only effective in the case of mass production, since each time it is desired to change the configuration or the bending pattern of the wire, it is necessary to replace the slides. in place by slides specially adapted to the new production envisaged, then to regulate the operation of the latter, this double operation can take two to three hours. Added to this is the fact that this multiple slide machine. requires very high cost tools.

La présente invention se propose de remédier à tous ces inconvénients et, pour ce faire, elle a pour objet une machine à cambrer du type spécifié en préambule, qui se caractérise en ce qu'elle comprend en outre des moyens pour engendrer un mouvement de rotation angulaire relatif entre l'organe de pliage et l'élément métallique, autour d'un deuxième axe confondu avec la direction d'avance de l'élément métallique, ce mouvement de rotation angulaire relatif étant synchronisé sur les deux autres mouvements de l'organe.de pliage et le mouvement d'avance par pas de l'élément métallique.The present invention proposes to remedy all these drawbacks and, to do this, it relates to a cambering machine of the type specified in the preamble, which is characterized in that it further comprises means for generating a rotational movement. relative angularity between the folding member and the metallic element, around a second axis coincident with the direction of advance of the metallic element, this relative angular rotational movement being synchronized with the two other movements of the member folding and forward movement by steps of the metal element.

Grâce à cette disposition, l'axe de rotation de l'organe de pliage peut être orienté dans n'importe quelle direction, par rapport à l'élement métallique à l'intérieur d'un plan perpendiculaire à la direction d'avance de ce dernier.Thanks to this arrangement, the axis of rotation of the folding member can be oriented in any direction, with respect to the metallic element inside a plane perpendicular to the direction of advance of this latest.

.L'organe de pliage peut en conséquence cambrer des fils dans toutes les directions de l'espace et la machine selon l'invention est à même de produire, à une cadence élevée et en continu, des fils pliés selon n'importe quelle configuration spatiale. On peut ainsi observer que la machine à cambrer selon l'invention présente tous les avantages de la première machine connue susmentionnée à pliage dans un seul plan, sans posséder les inconvénients de la machine à coulisseaux multiples pour un pliage spatial.The folding member can therefore bend wires in all directions of space and the machine according to the invention is able to produce, at a high and continuous rate, wires bent according to any configuration. spatial. It can thus be observed that the cambering machine according to the invention has all the advantages of the above-mentioned first known machine for folding in a single plane, without having the disadvantages of the multiple slide machine for spatial folding.

Selon un mode de réalisation préféré de l'invention, l'organe de pliage est monté à rotation autour du deuxième axe et les moyens de génération dudit mouvement angulaire relatif sont constitués par un troisième mécanisme d'entraînement sous l'action duquel l'organe de pliage peut être animé d'un mouvement de rotation angulaire autour de cet axe.According to a preferred embodiment of the invention, the folding member is mounted for rotation about the second axis and the means for generating said relative angular movement are constituted by a third drive mechanism under the action of which the member folding can be driven by an angular rotational movement around this axis.

Ce mode de réalisation de la machine à cambrer selon l'invention est plus particulièrement adapté à la fabrication d'articles réalisés par pliage d'un élément métallique continu; chaque article fini étant séparé de ce dernier par une cisaille qui agit à la sortie de l'organe distributeur,This embodiment of the bending machine according to the invention is more particularly suitable for the manufacture of articles produced by folding a continuous metallic element; each finished article being separated from the latter by a shear which acts at the outlet of the distributor member,

Selon une autre caractéristique de l'invention, l'organe distributeur est constitué par un canon cylindrique de section circulaire dont l'axe de symétrie constitue ledit deuxième axe, et, l'organe de pliage est constitué par un doigt de pliage monté coulissant sur ladite trajectoire rectiligne, dans une tête de support qui présente un axe de symétrie constituant le premier axe et qui est maintenue en rotation autour de cet axe à l'intérieur d'un bâti lui-même monté en rotation autour du canon distributeur, les premier, deuxième et troisième mécanismes d'entraînement agissant respectivement sur la tête de support le doigt de pliage, et le bâti.According to another characteristic of the invention, the distributor member is constituted by a cylindrical barrel of circular section whose axis of symmetry constitutes said second axis, and, the folding member consists of a folding finger mounted to slide on said rectilinear trajectory, in a support head which has an axis of symmetry constituting the first axis and which is kept in rotation around this axis inside a frame itself mounted in rotation around the distributor barrel, the first, second and third drive mechanisms acting respectively on the support head, the folding finger, and the frame.

Par comparaison avec les têtes de pliage cylindriques:classiques, ce doigt de pliage est d'un poids très réduit et oppose une inertie presque négligeable à la mise en action de son mécanisme de déplacement. Par suite, son mouvement de va-et-vient est instantané, ce qui a une influence favorable sur la vitesse de travail et la productivité de la machine à cambrer selon l'invention.By comparison with the cylindrical folding heads: conventional, this folding finger is of a very reduced weight and opposes an almost negligible inertia to the actuation of its movement mechanism. As a result, its back-and-forth movement is instantaneous, which has a favorable influence on the working speed and the productivity of the bending machine according to the invention.

Dans ce cas, le deuxième mécanisme d'entraînement du doigt de pliage comprend un vérin solidaire du bâti dont la tige traverse à coulissement libre la tête de support le long de l'axe de rotation de cette dernière, l'extrémité libre de cette tige étant reliée au doigt de pliage par une liaison latérale tournante, qui permet au doigt de pliage de tourner autour de la tige de vérin tout en pouvant être déplacé en translation par cette dernière, dans n'importe quelle position angulaire.In this case, the second folding finger drive mechanism comprises a jack integral with the frame, the rod of which passes freely through the support head along the axis of rotation of the latter, the free end of this rod. being connected to the folding finger by a rotating lateral link, which allows the folding finger to rotate around the cylinder rod while being able to be moved in translation by the latter, in any angular position.

Dans un mode préféré de réalisation, le premier mécanisme d'entrai- nement du doigt de pliage comprend une chaîne sans fin entraînée parallèlement à la direction d'avance du fil autour de deux roues dentées dont l'une est fixée coaxialement autour de la tête de support et l'autre est portée par un arbre fou monté à rotation libre sur le bâti parallèlement à l'axe de rotation de la tête de support, l'un des brins de la chaîne sans fin étant relié à l'extrémité libre de la tige d'un vérin qui s'étend dans la direction d'entrai- nement de la chaîne sans fin.In a preferred embodiment, the first folding finger drive mechanism comprises an endless chain driven parallel to the direction of advance of the wire around two toothed wheels, one of which is fixed coaxially around the head and the other is carried by a loose shaft mounted to rotate freely on the frame parallel to the axis of rotation of the support head, one of the strands of the endless chain being connected to the free end of the rod of a jack which extends in the direction of drive of the endless chain.

Ce mode d'entraînement en rotation de l'organe de pliage présente l'avantage d'une part,d'être d'une très grande précision en ce qui concerne la répétitibilité des angles de pliage et, d'autre part, de produire des rotations angulaires très faibles pouvant atteindre le 1/10 de degré.This mode of driving the folding member in rotation has the advantage, on the one hand, of being very precise with regard to the repeatability of the folding angles and, on the other hand, of producing very low angular rotations up to 1/10 of a degree.

Pour augmenter le degré de précision de ce deuxième mécanisme d'entraînement, on utilise une chaîne sans fin silencieuse et on prévoit en complément que l'extrémité libre de la tige du vérin est montée à coulissement le long d'un rail de guidage parallèle à la tige.To increase the degree of precision of this second drive mechanism, a silent endless chain is used and it is further provided that the free end of the cylinder rod is slidably mounted along a guide rail parallel to the stem.

Par ailleurs, le troisième mécanisme d'entraînement du doigt de pliage comprend une roue dentée de grand diamètre solidaire du bâti et centrée autour de l'axe de rotation de ce dernier, cette roue dentée de grand diamètre engrenant avec une roue dentée de petit diamètre clavetée sur un arbre, qui est entraînée, par l'intermédiaire d'une transmission à chaîne sans jeu, par un moteur pas à pas.Furthermore, the third folding finger drive mechanism comprises a large diameter toothed wheel secured to the frame and centered around the axis of rotation of the latter, this large diameter toothed wheel meshing with a small diameter toothed wheel keyed to a shaft, which is driven, via a chain drive without play, by a stepping motor.

Enfin, selon encore une autre caractéristique de l'invention, les différents mécanismes d'entrainement de l'organe de pliage ainsi que le dispositif d'avance sont actionnés en synchronisme par une commande numérique programmable à programmation assistée.Finally, according to yet another characteristic of the invention, the various drive mechanisms of the folding member as well as the advance device are actuated in synchronism by a programmable digital control with assisted programming.

Cette disposition permet d'augmenter considérablement la productivité de la machine selon l'invention dans le cas d'une fabrication moyenne série voire même petite série. En effet, les fonctionnements des mécanismes d'entrainement et du dispositif d'avance de la machine qui déterminent les paramètres de pliage sont commandés en synchronisme par un programme qui contient une suite d'instructions numériques et qui peut être enregistré sur une cassette à bande magnétique classique. Ainsi, le passage d'un type de fabrication à un autre nécessite simplement un changement de cassette dans l'appareil de lectrue de l'armoire de commande numérique, changement qui . peut être effectué en un temps très court de l'ordre de deux minutes.This arrangement considerably increases the productivity of the machine according to the invention in the case of medium series production or even small series. In fact, the operations of the drive mechanisms and of the machine advance device which determine the folding parameters are controlled synchronously by a program which contains a series of digital instructions and which can be recorded on a tape cassette. classic magnetic. Thus, the passage from one type of manufacturing to another simply requires a change of cassette in the reading apparatus of the digital control cabinet, which change. can be done in a very short time of the order of two minutes.

Un mode de réalisation de la machine à cambrer selon la présente invention va être décrit ci-après à titre d'exemple non limitatif, en référence aux dessins annexés dans lesquels :

  • - la figure 1 est une vue de côté schématique avec arrachements de la machine à cambrer selon ce mode de réalisation de l'invention ;
  • - la figure 2 est une vue en coupe de son dispositif de pliage proprement dit, effectuée dans le plan de la figure 1 ;
  • - la figure 3 est une vue en coupe effectuée selon la figure III-III de la figure 2 ; et
  • - la figure 4 est une vue représentant partiellement en coupe le troisième mécanisme d'entraînement de la machine à cambrer selon l'invention.
An embodiment of the cambering machine according to the present invention will be described below by way of nonlimiting example, with reference to the accompanying drawings in which:
  • - Figure 1 is a schematic side view with cutaway of the bending machine according to this embodiment of the invention;
  • - Figure 2 is a sectional view of its actual folding device, taken in the plane of Figure 1;
  • - Figure 3 is a sectional view taken according to Figure III-III of Figure 2; and
  • - Figure 4 is a view partially showing in section the third drive mechanism of the bending machine according to the invention.

Telle qu'elle est représentée sur les figures annexées, la machine qui fait l'objet de la présente invention est spécialement conçue pour produire en succession des articles en fil plié, par cambrage d'un fil métallique continu. Toutefois, il ne.s'agit pas là d'une application limitative de cette machine qui, avec un nombre réduit de modifications structurelles, peut être utilisée pour produire des articles réalisés par cambrage de tout autre type d'éléments métalliques minces et rectilignes, d' épaisseur constante, tels que des feuillards ou des tubes de petit diamètre.As shown in the appended figures, the machine which is the subject of the present invention is specially designed for producing articles of folded wire in succession, by bending a continuous metal wire. However, this is not a limiting application of this machine which, with a reduced number of structural modifications, can be used to produce articles produced by bending any other type of thin and straight metal elements, of constant thickness, such as strips or small diameter tubes.

Cette machine peut également servir au cambrage de simples segments d'éléments métalliques de ce type.This machine can also be used for bending simple segments of metallic elements of this type.

Comme on peut le voir sur la figure 1, un fil métallique continu 1, provenant d'un dévidoir motorisé non représenté passe tout d'abord à travers un dispositif de redressage 2. Ce dispositif de redressage est constitué d'un certain nombre de galets 3 montés libres en rotation sur le châssis 4 de la machine et disposés en quinconce sur deux rangées parallèles qui délimitent un passage pour le fil 1. En étant entrainé entre les deux rangées de galets, le fil qui présente une certaine courbure à sa sortie du dévidoir, est rendu rectiligne. La hauteur du passage défini par les deux rangées de galets peut être réglée par des moyens connus en fonction du diamètre du fil.As can be seen in FIG. 1, a continuous metallic wire 1, coming from a motorized reel, not shown, first passes through a straightening device 2. This straightening device consists of a number of rollers 3 mounted free to rotate on the chassis 4 of the machine and arranged in staggered rows on two parallel rows which delimit a passage for the wire 1. By being drawn between the two rows of rollers, the wire which has a certain curvature at its exit from the reel, is made rectilinear. The height of the passage defined by the two rows of rollers can be adjusted by known means depending on the diameter of the wire.

Dans l'alignement et à la sortie de ce dispositif de redressage se trouve un dispositif d'avance par pas 5 logé dans un carter 6 qui est fixé au châssis 4 de la machine. Ce dispositif d'avance 5 se compose d'une pince mobile 7 et d'une pince fixe 8. La pince mobile 7 est montée coulissante sur un rail cylindrique 9 parallèle à la direction d'avance du fil 1 et est fixée à l'extrémité de la tige 10 d'un vérin 11 porté par le carter 6. La pince fixe 8 est quant à elle solidarisée au rail 9, à proximité de son extrémité opposée au vérin 11. L'ouverture et la fermeture des deux pinces 7 ei sontcommandées par des moyens classiques connus en soi.In alignment and at the outlet of this straightening device is a step advancing device 5 housed in a casing 6 which is fixed to the chassis 4 of the machine. This advance device 5 consists of a movable clamp 7 and a fixed clamp 8. The movable clamp 7 is slidably mounted on a cylindrical rail 9 parallel to the direction of advance of the wire 1 and is fixed to the end of the rod 10 of a jack 11 carried by the casing 6. The fixed clamp 8 is in turn secured to the rail 9, near its end opposite to the jack 11. The opening and closing of the two clamps 7 ei are controlled by conventional means known per se.

Dans ce dispositif d'avance 5, la pince mobile saisit le fil 1 qui pénètre dans le carter 6 par une ouverture ménagée dans la paroi arrière de ce dernier. Puis la pince fixe 8 étant ouverte, la pince mobile 7, déplacée le long du rail 9 par le vérin 11, fait avancer le fil 1 sur une distance déterminée par la course de ce dernier. La pince fixe est alors fermée et le vérin ramène la pince mobile en position ouverte à son point de départ en vue d'un nouveau cycle d'avance du fil 1. De cette façon, la pince mobile 7 fait avancer le fil 1 selon une trajectoire rectiligne et par pas successifs non forcément identiques, en direction du dispositif de pliage 12 de la machine.In this advance device 5, the movable clamp grasps the wire 1 which enters the casing 6 through an opening in the rear wall of the latter. Then the fixed clamp 8 being open, the movable clamp 7, moved along the rail 9 by the jack 11, advances the wire 1 over a distance determined by the stroke of the latter. The fixed gripper is then closed and the jack brings the movable gripper back to its starting position in the open position for a new wire advance cycle 1. In this way, the movable gripper 7 advances the wire 1 according to a straight path and in successive steps not necessarily identical, in the direction of the folding device 12 of the machine.

Comme on peut le voir sur la figure 1, ce dispositif de pliage 12 comprend un canon distributeur cylindrique 13 à section circulaire, qui est solidarisé au châssis de la machine et qui s'étend dans le prolongement du dispositif d'avance 5 de manière à diriger le fil 1, déplacé en translation par ce dernier, à hauteur d'un organe de pliage mobile 14 qui assure le cambrage proprement dit du segment de fil émergeant du canon distributeur,autour du point de sortie de ce dernier. Une cisaille 15 est en outre amenée automatiquement, par un système d'actionnement non-représenté, au point de sortie du canon distributeur pour séparer par sectionnement chaque article fini du fil 1.As can be seen in FIG. 1, this folding device 12 comprises a cylindrical distributor barrel 13 of circular section, which is secured to the chassis of the machine and which extends in the extension of the advancement device 5 so as to direct the wire 1, displaced in translation by the latter, up to a movable folding member 14 which ensures the actual bending of the segment of wire emerging from the dispensing barrel, around the point of exit of the latter. A shears 15 is also automatically brought, by an actuation system not shown, to the exit point of the distributor barrel to separate by section each finished article from the wire 1.

Comme on peut le voir plus précisément sur la figure 2, le fil 1 qui pénètre dans le canon distributeur 13 par l'extrémité 16 de celui-ci, située près de la pince fixe 8 du dispositif d'avance 5, est déplacé en translation à l'intérieur d'un passage 17 s'étendant le long de l'axe longitudinal du canon 13, avant de sortir du canon à travers une buse effilée 18 montée amovible dans l'autre extrémité 19 du canon. Le passage longitudinal 17 présente un diamètre nettement supérieur au diamètre maximum que peut avoir le fil qui le traverse. Par contre, le canal 20 de la buse 18 est d'un diamètre rigoureusement égal à celui du fil à plier pour que ce dernier coulisse sans jeu à l'intérieur de la buse. En conséquence, on doit disposer d'un ensemble de buses adaptées à chaque diamètre de fil à plier. La buse choisie est fixée à l'extrémité 19 du canon 13 par une vis 21 mais, en variante, on peut prévoir dans le même but, une fixation à baion- nette.As can be seen more precisely in Figure 2, the wire 1 which enters the distributor barrel 13 through the end 16 thereof, located near the fixed clamp 8 of the feed device 5, is moved in translation inside a passage 17 extending along the long axis tudinal of the barrel 13, before leaving the barrel through a tapered nozzle 18 removably mounted in the other end 19 of the barrel. The longitudinal passage 17 has a diameter significantly greater than the maximum diameter that the wire passing through it can have. On the other hand, the channel 20 of the nozzle 18 has a diameter strictly equal to that of the wire to be bent so that the latter slides without play inside the nozzle. Consequently, there must be a set of nozzles adapted to each diameter of wire to be bent. The nozzle chosen is fixed to the end 19 of the barrel 13 by a screw 21 but, as a variant, it is possible to provide for the same purpose, a bayonet fixing.

Comme le montre encore la figure 2, l'organe de pliage mobile 14 est porté par un bâti 22 de telle manière à être disposé en face et très près du point de sortie de la buse 18. Sous l'action d'un premier mécanisme d'en- trainement, 24, l'organe de pliage 14 peut être animé d'un mouvement de rotation angulaire autour d'un axe Y qui s'étend per à la direction d'avance du fil 1 en alignement avec le point de sortie du canon distributeur 13. Par ailleurs, un deuxième mécanisme d'entraînement 23 permet de déplacer l'organe de pliage 14 selon un mouvement de va-et-vient sur une trajectoire rectiligne X parallèle à l'axe Y. Par la combinaison de ses deux mouvements, l'organe de pliage 14 peut être amené en contact latéral avec le segment de fil sortant du canon 13 puis le plier sur un certain angle dans un sens ou dans l'autre autour de la pointe de la buse 18. Mais comme on peut aisément le comprendre, un organe de pliage ne possédant que ces deux possibilités de mouvement peut uniquement plier le fil dans un plan perpendiculaire à son axe de rotation.As still shown in Figure 2, the movable folding member 14 is carried by a frame 22 so as to be arranged opposite and very close to the outlet point of the nozzle 18. Under the action of a first mechanism drive, 24, the folding member 14 can be driven in an angular rotational movement about an axis Y which extends per to the direction of advance of the wire 1 in alignment with the point of outlet of the distributor barrel 13. Furthermore, a second drive mechanism 23 makes it possible to move the folding member 14 in a reciprocating movement on a rectilinear trajectory X parallel to the axis Y. By the combination of its two movements, the folding member 14 can be brought into lateral contact with the segment of wire leaving the barrel 13 and then bend it at a certain angle in one direction or the other around the tip of the nozzle 18. But as can easily be understood, a folding member having only these two possibilities of movement can only fold ier the wire in a plane perpendicular to its axis of rotation.

C'est pourquoi, selon la caractéristique principale la présente invention, le bâti 22 qui porte l'organe de pliage 14, est monté à rotation autour du canon distributeur cylindrique 13, par l'intermédiaire de deux roulements 25 et peut être animé d'un mouvement de rotation angulaire transmis par un troisième mécanisme d'entraînement qui sera décrit plus loin en référence à la figure 4. Dès lors, l'organe de pliage 14 dispose d'une troisième possiblilité de mouvement qui consiste en une rotation angulaire autour d'un deuxième axe confondu avec l'axe longitudinal de symétrie du passage 17 du canon 13 c'est-à-dire avec la direction d'avance du fil 1. Par la combinaison de ce troisième mouvement avec les deux premiers, l'organe de pliage 14 peut cambrer le fil 1 dans toutes les directions de l'espace et la machine selon l'invention peut produire des fils pliés selon une configuration spatiale.This is why, according to the main characteristic of the present invention, the frame 22 which carries the folding member 14, is rotatably mounted around the cylindrical distributor barrel 13, by means of two bearings 25 and can be driven by an angular rotation movement transmitted by a third drive mechanism which will be described later with reference to Figure 4. Therefore, the folding member 14 has a third possibility of movement which consists of an angular rotation around d 'a second axis coincident with the longitudinal axis of symmetry of the passage 17 of the barrel 13, that is to say with the direction of advance of the wire 1. By the combination of this third movement with the first two, the member folding 14 can arch the wire 1 in all directions of space and the machine according to the invention can produce folded wires according to a spatial configuration.

Selon une deuxième caractéristique de la présente invention, l'organe de pliage 14 est constitué par un doigt cylindrique monté coulissant le long de la trajectoire X dans une tête de support 26 qui est elle-même maintenue à rotation à l'intérieur de la partie frontale du bâti 22 par l'intermédiaire de deux roulements 27, 28. Le doigt de pliage 14 est excentré par rapport à l'axe de symétrie de la tête de support 26, qui constitue en fait l'axe de rotation Y mentionné plus haut.According to a second characteristic of the present invention, the folding member 1 4 is constituted by a cylindrical finger mounted sliding along the path X in a support head 26 which is itself held in rotation inside the front part of the frame 22 via of two bearings 27, 28. The folding finger 14 is eccentric relative to the axis of symmetry of the support head 26, which in fact constitutes the axis of rotation Y mentioned above.

Sous l'action du deuxième mécanisme 23, le doigt de pliage 14 peut être tantôt sorti de sa tête de support 26 en vue de son positionnement contre le fil 1, tantôt rétracté pour permettre l'avance du fil 1 à la fin d'un cycle de pliage. On observera que de par son poids réduit, le doigt de pliage 14 oppose une inertie pratiquement négligeable à l'action du mécanisme d'entraînement 23; son mouvement de va-et-vient est par suite instantané ce qui a pour conséquence d'augmenter la vitesse de travail et la productivité de la machine à cambrer selon l'invention.Under the action of the second mechanism 23, the folding finger 14 can sometimes be taken out of its support head 26 for positioning against the wire 1, sometimes retracted to allow the wire 1 to advance at the end of a folding cycle. It will be observed that, by its reduced weight, the folding finger 14 opposes a practically negligible inertia to the action of the drive mechanism 23; its back-and-forth movement is therefore instantaneous, which has the consequence of increasing the working speed and the productivity of the bending machine according to the invention.

Le mécanisme d'entraînement 23 comprend plus précisément un vérin hydraulique 29 fixé sur la paroi supérieure 30 du bâti 22, dans laquelle est pratiquée une ouverture 31 traversée par la tige 32 du vérin. La tige de vérin 32 traverse à coulissement libre la tête de support 26, le long de l'axe Y et, à son extrémité libre, débouche dans une cavité intérieure 35 de la tête de support où elle est reliée au doigt de pliage 14 par une liaison tournante 36. Grâce à cette liaison, le doigt 14 peut être m5 en rotation autour de l'axe Y tout en pouvant être déplacé en translation par la tige 34, quelle que soit sa position angulaire.The drive mechanism 23 more precisely comprises a hydraulic cylinder 29 fixed to the upper wall 30 of the frame 22, in which an opening 31 is made through which the rod 32 of the cylinder is formed. The actuator rod 32 passes freely through the support head 26, along the axis Y and, at its free end, opens into an interior cavity 35 of the support head where it is connected to the folding finger 14 by a rotary link 36. Thanks to this link, the finger 14 can be rotated m5 about the axis Y while being able to be moved in translation by the rod 34, whatever its angular position.

Le premier mécanisme d'entraînement 24 du doigt de pliage 14 qui peut lui imprimer ce mouvement de rotation angulaire autour de l'axe Y, . est logé dans une cavité intérieure 33 du bâti 22.The first drive mechanism 24 of the folding finger 14 which can impart to it this angular rotation movement around the axis Y,. is housed in an interior cavity 33 of the frame 22.

En se reportant simultanément aux figures 2 et. 3, on peut voir ce premier mécanisme d'entraînement 24 qui comprend en premier lieu une chaîne sans fin 37 dont le représentation a été omise pour plus de clarté par la figure 2. Cette chaîne sans fin 37, qui est de préférence une chaîne silencieuse, coopère avec deux roues dentées 38, 39, dont l'une 38 est fixée coaxialement autour de la tête de support 26 et l'autre 39 est portée par un arbre fou 40, maintenu à rotation dans le bâti 22 de telle manière que son axe de rotation soit parallèle à celui de la tête de support- Les deux brins de la chaîne sans fin 39 sont ainsi parallèles à la direction d'avance du fil 1, et l'un d'eux est relié par un maillon de raccordement 41, à l'extrémité de la tige 42 d'un vérin hydraulique 43 fixé sur la face arrière 44 du bâti 22. L'extrémité libre de la tige de vérin 42 est en outre montée à coulissement par l'intermédiaire d'une douille à billes 45, le long d'un rail cylindrique 46 parallèle à la direction d'avance du fil et fixé par ses extrémités au bâti 22.Referring simultaneously to Figures 2 and. 3, we can see this first drive mechanism 24 which firstly comprises an endless chain 37, the representation of which has been omitted for clarity in FIG. 2. This endless chain 37, which is preferably a silent chain , cooperates with two toothed wheels 38, 39, one of which 38 is fixed coaxially around the support head 26 and the other 39 is carried by an idler shaft 40, held in rotation in the frame 22 so that its axis of rotation is parallel to that of the support head - The two strands of the endless chain 39 are thus parallel to the direction of advance of the wire 1, and one of them is connected by a connecting link 41 , at the end of the rod 42 of a hydraulic cylinder 43 fixed to the rear face 44 of the frame 22. The free end of the cylinder rod 42 is also slidably mounted by means of a bushing balls 45, along a cylindrical rail 46 parallel to the direction wire in advance and fixed by its ends to the frame 22.

On comprendra que, grâce à ce mécanisme, la chaîne sans fin 39, entraînée dans un sens ou dans l'autre par le vérin 43,fait tourner la tête de support 26 d'un angle déterminé par la course de la tige de vérin, cette rotation angulaire étant transmise au doigt de pliage 14 qui décrit un arc de cercle de même angle au centre, autour de l'axe Y. Ainsi, le doigt de pliage 14, en contact latéral avec le fil 1, peut plier ce dernier dans un plan perpendiculaire à l'axe Y, le degré de pliage obtenu étant directement fonction de la course de la tige du vérin 43.It will be understood that, thanks to this mechanism, the endless chain 39, driven in one direction or the other by the jack 43, rotates the support head 26 by an angle determined by the stroke of the jack rod, this angular rotation being transmitted to the folding finger 14 which describes an arc of a circle with the same angle in the center, around the axis Y. Thus, the folding finger 14, in lateral contact with the wire 1, can bend the latter in a plane perpendicular to the axis Y, the degree of folding obtained being a direct function of the stroke of the rod of the jack 43.

On fera ici observer que ce deuxième mécanisme d'entraînement est d'une très grande précision. Il permet de produire des rotations angulaires très faibles du doigt de pliage de l'ordre de 0,1 °, ce qui permet à ce dernier de réaliser des pliages selon des courbes non polygonales et notamment selon des arcs de cercle.It will be observed here that this second drive mechanism is very precise. It makes it possible to produce very small angular rotations of the bending finger of the order of 0.1 °, which allows the latter to perform bends according to non-polygonal curves and in particular according to arcs of a circle.

Le doigt 14 exerce son action de pliage sur le fil 1 par l'intermédiaire d'une gorge en forme de V 47 qui s'adapte à tous les diamètres de fil. Le doigt de pliage est en outre monté avec la liaison tournante 36, à l'intérieur d'un capot amovible 48 qui vient se fixer à la tête tournante, la liaison tournante venant se raccorder par encliquetage à l'extrémité libre de la tige 32.The finger 14 exerts its folding action on the wire 1 by means of a V-shaped groove 47 which adapts to all the wire diameters. The folding finger is further mounted with the rotary link 36, inside a removable cover 48 which is fixed to the rotary head, the rotary link coming to be snapped on to the free end of the rod 32 .

Le plan de pliage du fil 1 est déterminé, avant que le doigt 14 entre en action par le troisième mécanisme d'entraînement 49 qui va maintenant être décrit en référence à la figure 4.The bending plane of the wire 1 is determined, before the finger 14 comes into action by the third drive mechanism 49 which will now be described with reference to FIG. 4.

Comme on peut le voir; ce troisième mécanisme d'entraînement 49 comprend une roue dentée de grand diamètre 50 solidaire du bâti 22 et centrée atour de l'axe de rotation Z de ce dernier. La roue dentée 50 engrène avec une roue dentée de petit diamètre 51 qui est clavetée sur un arbre fixe 52 et qui est entraînée par un moteur pas à pas(dont seul l'arbre 54 est visible sur la figure 4), par l'intermédiaire d'une transmission à chaîne silencieuse 53 formant un réducteur sans jeu. La transmission à chaîne 53 comprend une chaîne sans fin 55 s'enroulant autour de deux pignons dentés 56 et 57, respectivement solidaires de l'arbre 52 de la petite roue dentée et de l'arbre 54 du moteur. La chaîne sans fin 55 est en outre tendue par un rouleau de tension réglable 58.As we can see; this third drive mechanism 49 comprises a large diameter toothed wheel 50 secured to the frame 22 and centered around the axis of rotation Z of the latter. The toothed wheel 50 meshes with a toothed wheel of small diameter 51 which is keyed onto a fixed shaft 52 and which is driven by a stepping motor (of which only the shaft 54 is visible in FIG. 4), via of a silent chain transmission 53 forming a backlash without play. The chain transmission 53 comprises an endless chain 55 winding around two toothed pinions 56 and 57, respectively integral with the shaft 52 of the small toothed wheel and of the motor shaft 54. The endless chain 55 is further tensioned by an adjustable tension roller 58.

On comprendra que, dans ce troisième mécanisme d'entraînement 49, un déplacement angulaire donné de la grande roue dentée 50 autour de l'axe de rotation Z oriente systématiquement dans une direction voulue, l'axe de rotation Y et donc le plan de pliage du fil 1, qui est ainsi déterminé par le pas de rotation du moteur.It will be understood that, in this third drive mechanism 49, a given angular displacement of the large toothed wheel 50 around the axis of rotation Z systematically orients in a desired direction, the axis of rotation Y and therefore the folding plane of wire 1, which is thus determined by the pitch of rotation of the motor.

L'ensemble constitué par la transmission à chaîne 53, la petite roue dentée 51 et le moteur pas-à-pas est logé à l'intérieur d'un carter de protection 59, qui est partiellement ouvert au niveau de l'engrenage des deux roues dentées 50 et 51 et peut être déplacé, perpendiculairement à leur axe de rotation,pour le réglage du jeu de denture.The assembly constituted by the chain transmission 53, the small toothed wheel 51 and the stepping motor is housed inside a protective casing 59, which is partially open at the level of the gear of the two toothed wheels 50 and 51 and can be moved, perpendicular to their axis of rotation, for adjusting the backlash.

Sur la figure 4 sont en outre représentés des ergots d'appui 60 disposés en spirale et autour desquels le tuyau d'alimentation 61 en fluide hydraulique sous pression du vérin 43 vient s'enrouler au cours des différentes rotations de la roue 50.FIG. 4 also shows support pins 60 arranged in a spiral and around which the supply pipe 61 for hydraulic fluid under pressure of the jack 43 is wound during the various rotations of the wheel 50.

Les différents vérins 11, 29 et 43 de la machine à cambrer selon l'invention sont, comme on peut le voir sur la figure 1, alimentés en fluide sous pression par une centrale hydraulique 62 sous la commande d'un pupitre de commande numérique schématisé par un carré sous la référence 63. Le moteur d'entraînement en rotation du bâti 22 ainsi que le dispositif d'actionnement de la cisaille 15 sont également commandés par ce pupitre de commande numérique.The different jacks 11, 29 and 43 of the cambering machine according to the invention are, as can be seen in FIG. 1, supplied with pressurized fluid by a hydraulic unit 62 under the control of a schematic digital console. by a square under the reference 63. The motor for rotating the frame 22 as well as the device for actuating the shears 15 are also controlled by this digital control console.

Le pupitre de commande numérique renferme un appareil de lecture dans lequel peut être introduite une cassette à bande magnétique sur laquelle un programme est pré-enregistré sous la forme d'une succession d'instructions numériques qui. régissent et synchronisent les fonctionnements des différents mécanismes d'entraînement 23, 24, 49, du dispositif d'avance 5 et du dispositif d'actionnement de la cisaille 15 de la machine en fonction du type d'article en fil plié que l'on souhaite réaliser.The digital control panel contains a playback device into which a magnetic tape cassette can be inserted on which a program is pre-recorded in the form of a succession of digital instructions which. govern and synchronize the operations of the various drive mechanisms 23, 24, 49, the feed device 5 and the shear actuation device 15 of the machine according to the type of bent wire article that is wish to achieve.

Plus précisément, ces instructions sont relatives, pour chaque cycle de pliage, à la vitesse et à l'angle de rotation du doigt de pliage 14 autour des deux axes Y et Z, à la longueur et à la vitesse d'avance du fil, au diamètre de ce dernier et à l'instant d'intervention de la cisaille 15.More precisely, these instructions relate, for each folding cycle, to the speed and the angle of rotation of the folding finger 14 around the two axes Y and Z, to the length and to the speed of advance of the wire, at the diameter of the latter and at the time of intervention of the shears 15.

Le programme permet en outre une recherche automatique des origines des différents mouvements de la machine à cambrer et la gestion des pannes-On comprendra que cette commande numérique programmable permet d'augmenter considérablement la rentabilité dans le cas d'une fabrication moyenne ou petite série, puisque un changement du type de fabrication ne nécessite qu'un remplacement d'une cassette-programme par une autre. Le programme d'un article peut en outre être visualisé sur un écran vidéo standard sous la forme d'un tableau et l'opérateur a la possibilité de modifier un quelconque paramètre du tableau par le curseur de l'écran vidéo.The program also allows an automatic search for the origins of the various movements of the cambering machine and the management of breakdowns. It will be understood that this programmable digital control considerably increases profitability in the case of a medium or small series production since a change in the type of manufacturing requires only one replacement of a program cassette by another. The program of an article can also be viewed on a standard video screen in the form of a table and the operator has the possibility of modifying any parameter of the table by the cursor of the video screen.

Il convient aussi d'insister sur la vitesse de travail particulièrement élevée dont est dotée la machine à cambrer selon l'invention.It is also necessary to emphasize the particularly high working speed with which the cambering machine according to the invention is endowed.

A titre d'illustration, on peut mentionner que les vitesses de rotation du doigt de pliage autour des axes Y et Z peuvent atteindre respectivement 277 t/mn et 66 t/mn et que la vitesse d'avance du fil peut aller jusqu'à 1 m/s.By way of illustration, it can be mentioned that the speeds of rotation of the folding finger around the axes Y and Z can reach 277 rpm and 66 rpm respectively and that the speed of advance of the wire can go up to 1 m / s.

Parmi les avantages de la machine à cambrer selon l'invention, on peut encore citer sa très grande souplesse d'utilisation. En effet, elle peut aussi bien plier des fils métalliques dont le diamètre peut atteindre 8 mm que des feuillards ou rubans métalliques. Pour le pliage des feùillards ou des rubans, il est bien entendu nécessaire d'adapter en conséquence la forme du passage central 17. du canon distributeur 13 et du canal 20 de la buse 18. La machine selon l'invention peut même réaliser des tubes coudés, plus particulièrement grâce à la très grande précision du deuxième mécanisme d'entraînement 24 du doigt de pliage 14, qui permet un cambrage en arc de cercle par touches successives rapprochées.Among the advantages of the cambering machine according to the invention, one can also cite its great flexibility of use. Indeed, it can bend metal wires whose diameter can reach 8 mm as well as metal strips or ribbons. To fold the strips or ribbons, it is of course necessary to adapt the shape of the central passage 17 accordingly . of the distributor barrel 13 and of the channel 20 of the nozzle 18. The machine according to the invention can even produce bent tubes, more particularly thanks to the very high precision of the second drive mechanism 24 of the folding finger 14, which allows a arching in a circular arc by successive keys close together.

Claims (9)

1. Machine automatique pour cambrer, selon une configuration prédéterminée, des éléments métalliques minces et rectilignes d'épaisseur constante du genre fils, feuillards ou tubes, cette machine comprenant un organe distributeur (13) à travers lequel un élément métallique à cambrer (1) peut être déplacé selon un mouvement d'avance par pas au moyen d'un dispositif d'avance (5), un organe de pliage (14) qui est situé en aval et à proximité de la sortie de l'organe distributeur (13) et qui peut, d'une part, au moyen d'un premier mécanisme d'entrainement (24), être animé d'un mouvement de rotation angulaire autour d'un axe (Y) perpendiculaire à la direction d'avance de l'élément métallique et, d'autre part, au moyen d'un deuxième mécanisme d'entraînement (23) être déplacé selon un mouvement de va-et-vient sur une trajectoire rectiligne (X) parallèle à cet axe (Y), les fonctionnements des premier et deuxième mécanismes d'entraînement (24,23) étant synchronisés sur celui du dispositif d'avance (5) selon un cycle prédéterminé, cette machine à cambrer étant caractérisée en ce qu'élle comprend en outre des moyens pour engendrer un mouvement de rotation angulaire relatif entre l'organe de pliage (14) et l'élément métallique (1), autour d'un deuxième axe (Z) confondu avec la direction d'avance de l'élément métallique, ce mouvement de rotation angulaire relatif étant synchronisé avec les deux autres mouvements de l'organe. de pliage et le mouvement d'avance par pas de l'élément métallique.1. Automatic machine for bending, according to a predetermined configuration, thin and rectilinear metallic elements of constant thickness such as wires, strips or tubes, this machine comprising a dispensing member (13) through which a metallic element to be bent (1) can be moved in a stepwise advance movement by means of an advance device (5), a folding member (14) which is located downstream and close to the outlet of the distributor member (13) and which can, on the one hand, by means of a first drive mechanism (24), be animated with an angular movement of rotation about an axis (Y) perpendicular to the direction of advance of the metallic element and, on the other hand, by means of a second drive mechanism (23) to be moved in a reciprocating movement on a rectilinear trajectory (X) parallel to this axis (Y), the operations first and second drive mechanisms (24,23) being synchronized with that of the forward device ce (5) according to a predetermined cycle, this arching machine being characterized in that it further comprises means for generating a relative angular rotational movement between the folding member (14) and the metal element (1) , around a second axis (Z) merged with the direction of advance of the metal element, this relative angular rotation movement being synchronized with the two other movements of the member. bending and forward movement in steps of the metal element. 2. Machine à cambrer selon la revendication 1, caractérisée en ce que l'organe de pliage (14) est monté à rotation autour du deuxième axe (Z) et en ce que les moyens de génération dudit mouvement angulaire relatif sont constitués par un troisième mécanisme d'entraînement (49) sous l'action duquel l'organe de pliage (14) peut être animé d'un mouvement de rotation angulaire autour de cet axe (Z):2. cambering machine according to claim 1, characterized in that the folding member (14) is rotatably mounted about the second axis (Z) and in that the means for generating said relative angular movement consist of a third drive mechanism (49) under the action of which the folding member (14) can be driven in an angular rotational movement around this axis (Z): 3. Machine à cambrer selon la revendication 2, caractérisée en ce que l'organe distributeur (13) est constitué par un canon cylindrique de section circulaire dont l'axe de symétrie constitue ledit deuxième axe (Z),
et en ce que l'organe de pliage (14) est constitué par un doigt de pliage monté coulissant, sur ladite trajectoire rectiligne (X), dans une tête de support (26) qui présente un axe de symétrie constituant le premier axe (Y) et qui est maintenue en rotation autour de cet axe à l'intérieur d'unbâti (22) lui-même monté en rotation autour du canon distributeur (13), les premier, deuxième et troisième mécanismes d'entraînement (24, 23, 49) agissant respectivement sur la tête de support (261 le doigt de pliage (14), et le bâti (22).
3. cambering machine according to claim 2, characterized in that the distributor member (13) is constituted by a cylindrical barrel of circular section whose axis of symmetry constitutes said second axis (Z),
and in that the folding member (14) is constituted by a folding finger slidably mounted, on said rectilinear trajectory (X), in a support head (26) which has an axis of symmetry constituting the first axis (Y ) and which is kept in rotation about this axis inside a frame (22) itself mounted in rotation around the distributor barrel (13), the first, second and third drive mechanisms (24, 23, 49) acting respectively on the support head (261 the folding finger (14), and the frame (22).
4. Machine à cambrer selon la revendication 3, caractérisée en ce que le deuxième mécanisme d'entraînement (23) du doigt de pliage (14) comprend un vérin (29) solidaire du bâti dont la tige (32) traverse à coulissement libre la tête de support (26) le long de l'axe de rotation (Y) de cette dernière, l'extrémité libre de cette tige (32) étant reliée au doigt de pliage (14) par une liaison latérale tournante (36).4. cambering machine according to claim 3, characterized in that the second drive mechanism (23) of the folding finger (14) comprises a jack (29) integral with the frame, the rod (32) of which slides freely support head (26) along the axis of rotation (Y) of the latter, the free end of this rod (32) being connected to the folding finger (14) by a rotating lateral link (36). 5. Machine à cambrer selon la revendication 3 ou 4, caractérisée en ce que le premier mécanisme d'entraînement (24) du doigt de pliage (14) comprend une chaîne sans fin (37) s'étendant parallèlement à la direction d'avance du fil autour de deux roues dentées (38, 39) dont l'une (38) est fixée coaxialément autour de la tête de support et l'autre (39) est portée par un arbre fou (40) monté à rotation libre sur le bâti (22), parallèlement à l'axe de rotation (Y) de la tête de support, l'un des brins de la chaîne sans fin (37) étant relié à l'extrémité libre de la tige (42) d'un vérin (43) qui lui est parallèle.5. cambering machine according to claim 3 or 4, characterized in that the first drive mechanism (24) of the folding finger (14) comprises an endless chain (37) extending parallel to the direction of advance wire around two toothed wheels (38, 39), one of which (38) is fixed coaxially around the support head and the other (39) is carried by a loose shaft (40) mounted to rotate freely on the frame (22), parallel to the axis of rotation (Y) of the support head, one of the strands of the endless chain (37) being connected to the free end of the rod (42) of a cylinder (43) which is parallel to it. 6. Machine à cambrer selon la revendication 5, caractérisée en ce que la chaîne sans fin (37) est une chaîne silencieuse.6. cambering machine according to claim 5, characterized in that the endless chain (37) is a silent chain. 7. Machine à cambrer selon la revendication 5 ou 6, caractérisée en ce qué l'extrémité libre de la tige (42) du vérin (43) est montée à coulissement le long d'un rail de guidage (46) parallèle à la tige (42).7. cambering machine according to claim 5 or 6, characterized in that the free end of the rod (42) of the jack (43) is slidably mounted along a guide rail (46) parallel to the rod (42). 8. Machine à cambrer selon l'une quelconque des revendications 3 à 7, caractérisée en ce que le troisième mécanisme d'entrainement (49) du doigt de pliage comprend une roue dentée de grand diamètre (50) solidaire du bâti (22) et centrée autour de l'axe de rotation (Z) de ce dernier, cette. roue dentée de grand diamètre engrenant avec une roue dentée de petit diamètre (51) clavetée sur un arbre (52), et entrainée,par l'intermédiaire d'une transmission à chaîne sans jeu,par un moteur pas à pas.8. cambering machine according to any one of claims 3 to 7, characterized in that the third drive mechanism (49) of the folding finger comprises a large diameter toothed wheel (50) integral with the frame (22) and centered around the axis of rotation (Z) of the latter, this. large diameter gear wheel meshing with a small diameter gear wheel (51) keyed onto a shaft (52), and driven, via a chain transmission without play, by a stepping motor. 9. Machine à cambrer selon l'une quelconque des revendications 1 à 8, caractérisée en ce que les différents mécanismes d'entraînement (23, 24, 49) de l'organe de pliage (14) ainsi que le dispositif d'avance (5) sont actionnés en synchronisme par une commande numérique programmable à programmation assistée.9. cambering machine according to any one of claims 1 to 8, characterized in that the various drive mechanisms (23, 24, 49) of the folding member (14) as well as the advance device ( 5) are actuated in synchronism by a programmable digital control with assisted programming.
EP83402155A 1982-11-08 1983-11-07 Automatic machine for bending thin and rectilinear metallic elements, especially metal wire, into a spatial configuration Expired EP0108695B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83402155T ATE28283T1 (en) 1982-11-08 1983-11-07 AUTOMATIC MACHINE FOR BENDING IN A SPATIAL CONFIGURATION FINE AND STRAIGHT METAL PARTS, ESPECIALLY METAL WIRE.

Applications Claiming Priority (2)

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FR8218697A FR2535629A1 (en) 1982-11-08 1982-11-08 AUTOMATIC MACHINE FOR CAMBRING ACCORDING TO A SPATIAL CONFIGURATION, THIN METALLIC AND RECTILINE ELEMENTS, IN PARTICULAR METALLIC WIRES
FR8218697 1982-11-08

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EP0108695A1 true EP0108695A1 (en) 1984-05-16
EP0108695B1 EP0108695B1 (en) 1987-07-15

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EP (1) EP0108695B1 (en)
AT (1) ATE28283T1 (en)
DE (1) DE3372448D1 (en)
ES (1) ES8406242A1 (en)
FR (1) FR2535629A1 (en)
PT (1) PT77611B (en)

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Publication number Priority date Publication date Assignee Title
FR2554021A1 (en) * 1983-11-02 1985-05-03 Autocoussin Sa PERFECTED AUTOMATIC MACHINE FOR CAMBRING ACCORDING TO A SPECIAL CONFIGURATION OF THIN AND RECTILINE ELEMENTS, IN PARTICULAR METALLIC WIRES
WO1985001898A1 (en) * 1983-11-02 1985-05-09 Autocoussin (Société Anonyme) Improved automatic machine to camber with a spatial configuration thin and rectilinear elements, particularly metal wires
EP0141745A1 (en) * 1983-11-02 1985-05-15 Autocoussin Industrie Automatic machine for bending thin and rectilinear elements, especially metal wire, into a spatial configuration
EP0231092A2 (en) * 1986-01-29 1987-08-05 Ronald Edward Benton Bending machine
JPS62187525A (en) * 1986-01-29 1987-08-15 ロナルド エドワ−ド ベントン Bending machine
EP0231092A3 (en) * 1986-01-29 1988-08-10 Ronald Edward Benton Bending machine
EP0245036A1 (en) 1986-05-07 1987-11-11 Ronald Edward Benton Fluid flow or pressure transmission device
EP0245036B1 (en) * 1986-05-07 1991-09-11 Ronald Edward Benton Fluid flow or pressure transmission device
FR2602159A1 (en) * 1986-08-04 1988-02-05 Latour Fils METHOD AND MACHINE FOR BENDING METAL WIRES
EP0258109A1 (en) * 1986-08-04 1988-03-02 LATOUR & FILS Method and apparatus for bending metallic wires
FR2610852A1 (en) * 1987-02-17 1988-08-19 Picot Sa TUBE BENDING MACHINE WITH TWO BENDING HEADS
EP0281488A1 (en) * 1987-02-17 1988-09-07 Eaton Leonard Picot S.A. Turning bending head for a tube-bending machine
DE3712110C1 (en) * 1987-04-10 1988-04-28 Alpha Maschb Ag Device for three-dimensional bending of extruded material such as wire or the like.
EP0419443A1 (en) * 1989-09-20 1991-03-27 EVG Entwicklungs- u. Verwertungs- Gesellschaft m.b.H. Machine for bending bar material in reinforcing elements for concrete
WO1991004112A1 (en) * 1989-09-20 1991-04-04 Evg Entwicklungs- U. Verwertungs-Gesellschaft M.B.H. Device for bending rod-like material to form concrete reinforcements
US5193378A (en) * 1989-09-20 1993-03-16 Evg Entwicklungs-U Verwertungs-Gesellschaft M.B.H Device for bending rod-like material to form concrete reinforcements
EP0517637A1 (en) * 1991-06-06 1992-12-09 LATOUR & FILS Multiple tool bending head for a wire bending machine
WO1992021455A1 (en) * 1991-06-06 1992-12-10 Latour & Fils S.A. Multiple-tool bending head for wire bending machine
FR2677282A1 (en) * 1991-06-06 1992-12-11 Latour Yves MULTIPLE TOOL BENDING HEAD FOR METAL WIRE BENDING MACHINE.
US5349838A (en) * 1991-06-06 1994-09-27 Latour & Fils S.A. Bending head with multiple tools for a machine for bending metal wires

Also Published As

Publication number Publication date
FR2535629A1 (en) 1984-05-11
US4555924A (en) 1985-12-03
FR2535629B1 (en) 1985-04-19
DE3372448D1 (en) 1987-08-20
ES527079A0 (en) 1984-08-01
ES8406242A1 (en) 1984-08-01
PT77611A (en) 1983-12-01
PT77611B (en) 1986-03-12
EP0108695B1 (en) 1987-07-15
ATE28283T1 (en) 1987-08-15

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