EP0108695B1 - Machine automatique pour cambrer selon une configuration spatiale, des éléments métalliques minces et rectilignes, et notamment des fils métalliques - Google Patents

Machine automatique pour cambrer selon une configuration spatiale, des éléments métalliques minces et rectilignes, et notamment des fils métalliques Download PDF

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Publication number
EP0108695B1
EP0108695B1 EP83402155A EP83402155A EP0108695B1 EP 0108695 B1 EP0108695 B1 EP 0108695B1 EP 83402155 A EP83402155 A EP 83402155A EP 83402155 A EP83402155 A EP 83402155A EP 0108695 B1 EP0108695 B1 EP 0108695B1
Authority
EP
European Patent Office
Prior art keywords
axis
bending
rotation
curved
driving means
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP83402155A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0108695A1 (fr
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
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Autocoussin SA, Autocoussin Industrie SA filed Critical Autocoussin SA
Priority to AT83402155T priority Critical patent/ATE28283T1/de
Publication of EP0108695A1 publication Critical patent/EP0108695A1/fr
Application granted granted Critical
Publication of EP0108695B1 publication Critical patent/EP0108695B1/fr
Expired legal-status Critical Current

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Classifications

    • 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
    • B21F1/006—Bending wire other than coiling; Straightening wire in 3D with means to rotate the tools about the wire axis
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F35/00—Making 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 of the son, strip or tube type according to the preamble of claim 1, see US-E 27021.
  • the element to be bent it provision is made for the element to be bent to be subjected to angular rotation about the axis of the element to be bent.
  • 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 consists of 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 formed by a fixed finger eccentric with respect 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.
  • 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 by the characteristics of the characterizing part of claim 1.
  • 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 arch wires in all directions of space, and the machine according to the invention is able to produce, at a high and continuous rate, wires folded according to any configuration. spatial. It can thus be observed that the cambering machine according to the invention has all the advantages of the first machine as mentioned above for folding in a single plane, without having the disadvantages of the multiple slide machine for spatial folding.
  • cambering machine 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 body.
  • 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 support head and the other is carried by a loose shaft mounted for free rotation 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 a cylinder 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 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, d 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 as a function of 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 the jack 11.
  • the opening and closing of the two clamps 7 and 8 are controlled by conventional means known per se.
  • the movable clamp grasps the wire 1 which enters the casing 6 through an opening mj arranged 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 advance device 5 so as to direct the wire 1, moved in translation by the latter, at the level of 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 dispensing 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 chosen nozzle 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 disposed opposite and very close to the point of exit from the nozzle 18.
  • the folding member 14 Under the action of a first drive mechanism, 24, the folding member 14 can be driven by an angular rotation movement about an axis Y which extends perpendicularly to the direction of advance of the wire 1 in alignment with the point of exit 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 member bending 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 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 animated by a movement of angular rotation transmitted by a third drive mechanism which will be described later with reference to FIG. 4. Consequently, the folding member 14 has a third possibility of movement which consists of an angular rotation around a second axis coincides 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 folding member 14 can bend wire 1 in all directions of space and the machine can produce wires bent in a spatial configuration.
  • the folding member 14 is constituted by a cylindrical finger mounted sliding along the path X in a support head 26 which is itself kept in rotation inside the front part of the frame 22 by means of two bearings 27, 28.
  • the folding finger 14 is eccentric relative to the axis of symmetry of the head of the support 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.
  • the drive mechanism 23 more specifically 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.
  • Cylinder rod 32 grout cross member the support head 26 along the axis Y is free 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 connection, the finger 14 can be rotated 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 first includes an endless chain 37 whose representation 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 a shaft idler 40, kept 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, to the end of the rod 42 of a jack.
  • hydraulic 43 fixed to the rear face 44 of the frame 22.
  • the free end of the jack rod 42 is also slidably mounted by means of a ball bushing 45, along a cylindrical rail 46 parallel to the direction of advance of the wire 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), by the intermediate 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 the motor shaft 54.
  • the endless chain 55 is further tensioned by an adjustable tension roller 58.
  • 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.
  • 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 cylinders 11, 29 and 43 of the bending machine are, as can be seen in FIG. 1, supplied with pressurized fluid by a hydraulic unit 62, under the control of a digital control panel shown diagrammatically by a square under the reference 63.
  • the motor for rotating the frame 22 as well as the actuation device for the shears 15 are also controlled by this digital control console.
  • the digital control panel contains a reading 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 mechanisms of drive 23, 24, 49, of the advance device 5 and of the device for actuating the shears 15 of the machine according to the type of article of bent wire which it is desired to produce.
  • 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 different movements. ffients of the bending machine and fault management.
  • this programmable digital control makes it possible to considerably increase the profitability in the case of a medium or small series production, since a change in the type of production requires only one replacement of one 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.
  • cambering machine can bend metal wires whose diameter can reach 8 mm as well as metal strips or ribbons.
  • metal wires whose diameter can reach 8 mm as well as metal strips or ribbons.
  • 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 bending in an arc by successive close keys.
EP83402155A 1982-11-08 1983-11-07 Machine automatique pour cambrer selon une configuration spatiale, des éléments métalliques minces et rectilignes, et notamment des fils métalliques Expired EP0108695B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83402155T ATE28283T1 (de) 1982-11-08 1983-11-07 Automatische maschine zum biegen in einer raeumlichen konfiguration feiner und gerader metallteile, insbesondere metalldraehten.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8218697A FR2535629A1 (fr) 1982-11-08 1982-11-08 Machine automatique pour cambrer selon une configuration spatiale, des elements metalliques minces et rectilignes, et notamment des fils metalliques
FR8218697 1982-11-08

Publications (2)

Publication Number Publication Date
EP0108695A1 EP0108695A1 (fr) 1984-05-16
EP0108695B1 true EP0108695B1 (fr) 1987-07-15

Family

ID=9278996

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83402155A Expired EP0108695B1 (fr) 1982-11-08 1983-11-07 Machine automatique pour cambrer selon une configuration spatiale, des éléments métalliques minces et rectilignes, et notamment des fils métalliques

Country Status (7)

Country Link
US (1) US4555924A (un)
EP (1) EP0108695B1 (un)
AT (1) ATE28283T1 (un)
DE (1) DE3372448D1 (un)
ES (1) ES8406242A1 (un)
FR (1) FR2535629A1 (un)
PT (1) PT77611B (un)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2554021B1 (fr) * 1983-11-02 1987-09-04 Autocoussin Sa Machine automatique perfectionnee pour cambrer selon une configuration speciale des elements minces et rectilignes, et notamment des fils metalliques
JPS61245928A (ja) * 1985-04-23 1986-11-01 Shinsei Kogyo Kk 曲げ加工装置
EP0231092B1 (en) * 1986-01-29 1991-08-21 Ronald Edward Benton Bending machine
GB8602147D0 (en) * 1986-01-29 1986-03-05 Benton R E Bending machine
GB2190161B (en) 1986-05-07 1990-09-19 Ronald Edward Benton Fluid flow or pressure transmission device
FR2602159B1 (fr) * 1986-08-04 1993-12-10 Latour Fils Procede et machine de pliage de fils metalliques
FR2610852B1 (fr) * 1987-02-17 1993-07-02 Picot Sa Machine a cintrer les tubes, pourvue de deux tetes de cintrage
JPH0357312Y2 (un) * 1987-03-30 1991-12-26
DE3712110C1 (de) * 1987-04-10 1988-04-28 Alpha Maschb Ag Vorrichtung zum dreidimensionalen Biegen strangfoermigen Materials wie Draht od.dgl.
DE3915784C1 (un) * 1989-05-13 1990-07-05 Wafios Maschinenfabrik Gmbh & Co Kg, 7410 Reutlingen, De
AT393640B (de) * 1989-09-20 1991-11-25 Evg Entwicklung Verwert Ges Vorrichtung zum biegen von stabfoermigem material zu betonbewehrungselementen
DE4021346C1 (un) * 1990-07-05 1991-07-04 Alpha Maschinenbau Ag, Zuerich, Ch
FR2677282B1 (fr) * 1991-06-06 1993-10-22 Yves Latour Tete de cambrage a outils multiples pour machine a cambrer les fils metalliques.
US5481896A (en) * 1992-06-11 1996-01-09 Itami Industrial Co., Ltd. Knife bending apparatus
US5471857A (en) * 1994-03-07 1995-12-05 Mascotech Tubular Products, Inc. Process for hydroforming a vehicle manifold
US5771726A (en) * 1996-08-28 1998-06-30 Kenney Manufacturing Company Apparatus and method for twisting hollow rods
CN108555183A (zh) * 2018-04-18 2018-09-21 苏州祥龙嘉业电子科技股份有限公司 一种led灯脚半自动折弯机及其对应的折弯方法

Family Cites Families (11)

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US3045740A (en) * 1960-04-14 1962-07-24 Jack C Davis Wire bending machine
US3181323A (en) * 1960-11-28 1965-05-04 Bos Karel Tube bending apparatus
US3245433A (en) * 1962-05-10 1966-04-12 Geometric Spring Company Wire bending machine
FR1335279A (fr) * 1962-09-14 1963-08-16 Power Strapping Systems Ltd Perfectionnements apportés aux machines pour la production de liens en fil métallique
GB1011988A (en) * 1963-03-14 1965-12-01 Slumberland Group Ltd Wire bending machine
US3393714A (en) * 1965-05-19 1968-07-23 Lear Siegler Inc Wire-bending apparatus
US3373587A (en) * 1966-12-08 1968-03-19 Shubin Vladimir Nikolaevich Automatic tube bending machines
US3493016A (en) * 1967-06-16 1970-02-03 Lear Siegler Inc Wire bending machine
USRE27021E (en) * 1969-07-24 1971-01-05 Wire-bending apparatus
AT316268B (de) * 1972-05-02 1974-07-10 Evg Entwicklung Verwert Ges Biegemaschine für stab- oder bandförmiges Material
IT1059392B (it) * 1976-01-08 1982-05-31 Fabro Marcello Del Metodo di piegatura e relativa macchina piegatrice di barre o filo metallico

Also Published As

Publication number Publication date
FR2535629A1 (fr) 1984-05-11
PT77611A (fr) 1983-12-01
EP0108695A1 (fr) 1984-05-16
PT77611B (fr) 1986-03-12
ES527079A0 (es) 1984-08-01
FR2535629B1 (un) 1985-04-19
US4555924A (en) 1985-12-03
DE3372448D1 (en) 1987-08-20
ES8406242A1 (es) 1984-08-01
ATE28283T1 (de) 1987-08-15

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