EP0053601B1 - Apparatus for bending straight wires into a zig-zag form, in particular for machines for making diagonal network - Google Patents

Apparatus for bending straight wires into a zig-zag form, in particular for machines for making diagonal network Download PDF

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Publication number
EP0053601B1
EP0053601B1 EP81890172A EP81890172A EP0053601B1 EP 0053601 B1 EP0053601 B1 EP 0053601B1 EP 81890172 A EP81890172 A EP 81890172A EP 81890172 A EP81890172 A EP 81890172A EP 0053601 B1 EP0053601 B1 EP 0053601B1
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EP
European Patent Office
Prior art keywords
bars
wires
wire
zig
bending
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
EP81890172A
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German (de)
French (fr)
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EP0053601A1 (en
Inventor
Hans Dipl.-Ing. Gött
Josef Dipl.-Ing. Dr. Ritter
Klaus Dipl.-Ing. Ritter
Gerhard Dipl.-Ing. Dr. Ritter
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EVG Entwicklungs und Verwertungs GmbH
Original Assignee
EVG Entwicklungs und Verwertungs GmbH
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Publication of EP0053601A1 publication Critical patent/EP0053601A1/en
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Publication of EP0053601B1 publication Critical patent/EP0053601B1/en
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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
    • B21F1/04—Undulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F27/00—Making wire network, i.e. wire nets
    • B21F27/08—Making wire network, i.e. wire nets with additional connecting elements or material at crossings
    • B21F27/10—Making wire network, i.e. wire nets with additional connecting elements or material at crossings with soldered or welded crossings

Definitions

  • the invention relates to a device for zigzag-shaped bending parallel to one another in a plane of straight wires with the aid of rails which can be displaced transversely to the wire coulter and which carry wire deflecting pins at the appropriate intervals and are moved alternately in opposite directions transversely to this direction during a working movement in the wire feed direction by means of a control device .
  • Devices of this type are required in particular for machines for producing so-called diagonal grids, in which two groups of alternately oppositely zigzag-shaped wires are produced and two adjacent ones of these wires are connected to each other on the facing and possibly even slightly overlapping wave crests.
  • the rails carrying the deflection pins are arranged at equal angular intervals on the circumference of a roller and can be displaced parallel to the roller axis.
  • control cam tracks arranged on the side of the roller and engaging on the rail ends, several rails are alternately shifted in opposite directions in such a way that the wires are gripped at intervals from opposite sides, placed under tensile stress, and are increasingly bent around the pins in a zigzag fashion while sliding on the pins.
  • the invention is therefore concerned with the task of eliminating the disadvantages described in a bending device of the type specified in the introduction by preventing the wires from sliding on the deflection pins during the bending processes and therefore bending the wires around the deflection pins without any walk.
  • each of the rails carrying the deflection pins is articulated at the ends of at least two equally long, parallel and pivotably mounted support arms, the pivot axes of which are perpendicular to the bending plane and at least approximately in alignment with the centers of nestling circles of that evolution are arranged, which are described by deflecting pins of successive rails tangent wire sections of a given length, and that by means of the control device only one rail for each bending operation, namely by the full amplitude of the desired zigzag shape and with simultaneous pivoting of its support arms.
  • a relative rolling movement of the deflection pin on the wire occurs that does not contain any sliding component, so that flexing of the wires at the bending points is avoided.
  • AT-B-317 646 describes a device for bending strut snakes which are in particular intended as infill of lattice girders, in which a walk-free bending process is to be achieved in that the pivot point of the girder of the active bending tool is on the center perpendicular of the connecting straight line of the center points of the active bending tool at the beginning and at the end of the bending process.
  • a rolling movement on the rod to be bent must be superimposed on the working movement of the respectively active bending tool, so that it rotates during the bending process by an angle that is the same as the bending angle.
  • the present invention enables a walk-free bending of all wires of an arbitrarily large wire coulter around deflection pins which are fixed with respect to their mounting rail, as a result of which the bending device, in particular if the number of wires in the wire coulter, for example for the production of wide diagonal gratings, is very large , can be made much simpler and more reliable.
  • the pivot axes of the support arms of the rails run radially to the roller according to the invention and are offset from one another in the axial direction from rail to rail by half the division of the row of deflection pins.
  • the pivot axes of the support arms of at least two rails are mounted in a component that can be moved back and forth in the wire feed direction, and the deflection pins of the rails can be removed from the bending plane at the end of a bending process, e.g. by pivoting or lifting the component supporting the rails in order to enable the rail-like component to move backwards after each bending operation.
  • a lower crossbeam 2 is arranged in a machine frame 1, along which dressage devices 3 are provided for the wires of a wire coulter 4.
  • the dressage devices 6 for the wires of a second wire coulter 7 are arranged on a second, upper crossbar 5.
  • the two wire coulters 4 and 7 are drawn off from discharge drums (not shown) via deflecting rollers 8, 9, guided from below or above into a common vertical plane and, from there, after being deformed by means of shaping rollers 15, 16, are fed to a lattice production machine.
  • the deflecting rollers 8, 9 have been omitted so as not to disturb the overview.
  • two stands 13, 14 are arranged, in which the two form rollers 15, 16 are rotatably mounted.
  • the drive for the forming rolls and all other elements of the machine is carried out by a motor 17 via gearwheels 18 only indicated.
  • each wire is deflected on the shaping rolls 15 and 16 assigned to them, each wire, as can be seen in FIG. 2 and will be explained in more detail later, is bent in a zigzag shape along the circumference of the roll.
  • the two zigzag-shaped wire coils created in this way one of which runs along the circumference of the shaping roller 16 and the other along the circumference of the shaping roller 15, lie opposite one another at the end of their deflection path on the two shaping rollers in such a way that they face each other Spread over the crest of the shaft by a small amount.
  • the family of wire coils formed by the upper form roller 16 and the family of wire coils formed by the lower form roller 15 and drawn off tangentially by the form rollers are guided into a common plane and between connecting tools of a lattice production machine, by means of which the mutually facing, somewhat overlapping Vertices of adjacent wire coils of the two shares are connected to one another, so that a grid with essentially rhombic meshes is formed.
  • the roller electrodes 21, 22 are arranged at intervals and parallel to one another along shafts 23, 24 which are mounted in side disks 25, 26.
  • the disks 25 are rigidly attached to a beam 27 extending across the machine width.
  • the disks 26 are essentially triangular in shape and are each connected at one of their corner points via a joint 28 to a support 29 which in turn is fastened to a beam 30 which extends across the machine width.
  • One of the bars 27 or 30 can also be designed to be adjustable in height by means not shown because generally known means, in order to be able to adapt the distance between the roller electrodes 21, 22 to different wire diameters.
  • each disk 26 is connected by a joint 31 to an adjustable compression spring 32, with the aid of which the contact pressure of the roller electrodes 22 on the wire crossing points can be adjusted as required.
  • the roller electrodes 22 are alternately connected to the two poles of the secondary side of welding transformers 34 by means of flexible supply lines 33.
  • adjacent upper roller electrodes 22 are electrically insulated from one another, whereas the lower roller electrodes 21 are conductively connected to one another and thus form a passive current bridge.
  • Gripping hooks 41, 42 which are attached to beams 43, 44 running across the width of the machine, carry out the lattice transport.
  • the beams 43, 44 engage trunnions which are arranged at one end of one-armed levers 45, 46; the other ends of these one-armed levers are rotatably connected to shafts 47, 48.
  • the camshafts 47, 48 are set in reciprocating pivoting movements via cam drives, not shown, in such a way that the end of the one-armed lever 45 carrying the bar 43 moves away from the roller electrodes 21, 22, while the one carrying the bar 44 moves End of the one-armed lever 46 moved to the roller electrodes 21, 22, and vice versa.
  • the bars 43, 44 are pivoted about their longitudinal axes via two single-arm levers 49, 51 and a bumper 53, or via two single-arm levers 50, 52 and a bumper 54, the bars moving away from the roller electrodes 21, 22 in each case - in the working phase assumed above, the beam 43 is pivoted such that its gripping hooks 41 engage the mesh meshes, while at the same time the gripping hooks 42 of the other beam 44 are pivoted out of engagement with the mesh, and vice versa.
  • the one-armed levers 51, 52 are arranged in a rotationally fixed manner on shafts 55, 56, which are set into reciprocating pivoting movements via cam drives.
  • the drive of the actual deformation tools is removed from an eccentric 71 and transmitted from a connecting rod 72 to one arm of an angle lever 73, on the other arm of which a bumper 74 is articulated. 2 is articulated to one arm of two further angle levers 75, 76, on the other arms of which the end of another bumper 77, 78 is articulated.
  • the ends of the bumpers 77, 78 opposite the angle levers 75, 76 are articulated to the stand 13 with rockers 79, 80.
  • the bumpers 77, 78 have components 81 which act as stops and which partially engage in a cam track 82 in the working position.
  • a cam track 82 is located at both ends of each of the two molding rolls 15, 16, and the ends of rails 83 arranged along the circumference of the molding rolls 15, 16 come alternately, the one track with the cam track on the right side of the machine and the the next rail engages with the cam track on the left side of the machine, by means of guide rollers.
  • the assigned angle lever for example the angle lever 75 in FIG. 4, executes a pivoting movement through which the bumper 77 is moved together with its stop 81 in the direction and by the amount of the desired parallel displacement of the rail 83 corresponding to the deformation of the wire.
  • the stop 81 of the bumper 77 grasps the guide roller of the rail and brings it into its new position on the raised part of the cam track 82.
  • One of the prerequisites for forcing the wires to deform without sliding along the spaced diverter pins 86 of one of the rails 83 is that only a single one of the rails 83 is always displaced parallel to itself during a given time interval the other rails are at rest.
  • the parallel displacements of the individual rails must therefore take place successively and in each case by an amount which is equal to the amplitude of the desired zigzag shape of the wires, and moreover must take place during a period during which the shaping rollers 15, 16 pass through an angle which is equal to that fraction is a full circle, which results from dividing the full circle by the number of rails 83 arranged along the circumference of a shaping roller.
  • the deformation region 82a of the cam track which also depends on the desired mesh shape, with the track sections lying in front of and behind it in the direction of rotation of the forming rolls, encloses such a steep angle that this area of the cam track is inclined from the guide rollers of the rails 83 could not be run due to self-locking without the participation of the movable stops 81.
  • This can be seen particularly clearly from the development of the cam track 82 shown in FIG. 6.
  • a distance X can also be seen in FIG. 6 by which the stop 81 is moved beyond the required amplitude in order to take account of springback of the bent wire after relief by the deflection pins 86.
  • the arms of the angle levers 75, 76 which actuate the push rods 77, 78 and the rockers 79, 80 are arranged at an angle to one another such that that one of these elements, on the side of which a stop 81 for Parallel movement of a rail 83 is active, is pivoted from a rest position running at an acute angle to the circumferential plane of the forming rollers 15, 16 into a working position parallel to this circumferential plane.
  • the end of the bumpers 77, 78 which becomes active at a given time for parallel displacement of one of the rails, with its associated stop 81, is also simultaneously raised in the direction of movement of the rail 83, so that the stops 81 can be made narrow because they are also move in the circumferential direction with the shaping roller and therefore guide rollers of further rails 83 following in the same cam track 82 are not hindered by these stops. 4, the two extreme positions of the stop 81 are drawn in full line or in broken line.
  • a deflection pin 86a has moved from its initial position (not shown) into its end position shown in FIG. 7.
  • the wire D gripped by this deflecting pin comes from one of the deflecting rollers 8, 9, touches the pin 86a at the point T1 and partially wraps around it.
  • the wire D is touched by the next deflecting pin 86b, which is still in its rest position Mb.
  • points P1 to P3 must also lie on a conforming circle at the Evolute. This is the case when the deflection pin 86b is moved in a circular path around a point M which lies at the intersection of normals established in the centers of the chords P1-P2 and P2-P3.
  • the axes of the journals 85 of the support arms 84 which carry the rail 83 on which the deflecting pins 86b are arranged, must therefore be the generatrix of the cylinder jacket of the forming roll intersect at point M, and the axes of these support arms 84 must run parallel to the line M-Mb at the moment of contact of the wires D through the journals 86b.
  • FIGS. 8 to 10 show another embodiment of a device according to the invention.
  • the actual bending process in this embodiment is based on the same principle as in the embodiment shown in FIGS. 1 to 7, but instead of the forming rolls 15, 16 two bars 101, 102 are provided, which are parallel to the planes of movement in parallel to them Layers of wire 4, 7 fed back and forth can be moved.
  • At least two pairs of bearing journals 85 are provided on each of the two beams 101, 102, which bear rails 83 with deflection pins 86 on support arms 84 in the same way as shown in FIGS. 3 to 5.
  • at least two rows of immovably fixed preferred pins 103 are arranged on each of the two beams 101, 102, which engage in already formed bending points of the wires of the wire shares 4, 7 and thereby the already deformed wires in converging guides 20 and push it through to the welding station.
  • the two beams 101, 102 are connected to one another by means of joints 105 and can be opened and closed pivoting about these joints like the jaws of a pair of pliers.
  • joints 105 In the wire feed direction in front of the joints 105 of the bars 101, 102 there are automatic clamping devices 106, 107 - one for each wire to be fed - which, when the bars 101, 102 move forward, grasp the incoming wires of the wire shares 4, 7 and are not shown Pull off the reel, but slide the bars 101, 102 backwards along the wires as you move them back without taking them with you.
  • the entire drive is removed from a motor-driven shaft 110.
  • a first cam disk 111 (FIG. 10) sits on this shaft 110 and actuates a one-armed lever 112 via a scanning roller 113.
  • the one-armed lever 112 loaded by a return spring 114 is arranged in a rotationally fixed manner at the end of a shaft 115, along which two further one-armed levers 116 are wedged.
  • the levers 116 engage with sliding blocks 117 in correspondingly shaped slots in the articulated region of the beams 101, 102 and give these beams the common forward and reverse movement mentioned.
  • a spring-loaded angle lever 122 is actuated, which acts on a lever 124 via a bumper 123.
  • the lever 124 is connected in a rotationally fixed manner to a shaft 125, which is connected to a shaft 126, which is parallel to it and cooperates with it, for rotation via only indicated gear wheels.
  • the two shafts 125, 126 carry a number of one-armed levers 127, 128, which are provided with teeth 129, which engage laterally before electrodes 130, 131, and before they come into effect, into the grid meshes and thereby the overlapping and intended vertex areas for welding Bring two zigzag-shaped, adjacent wires into the correct relative position to each other. After the welding process, the levers 127, 128 swivel back into their rest position and release the grid mesh for the further transport of the grid.
  • the electrodes 130, 131 are designed as elongated rails in order to be able to detect two welding points each from two adjacent wires to be welded which overlap with their wave apices.
  • the upper electrodes 130 are arranged in a known manner in an electrode bar 140 which extends and moves up and down over the machine width and is resiliently supported with respect thereto.
  • the electrode bar 140 is articulated to two equally long, parallel, pivotably mounted levers 141, 142, of which the lever 142 extends beyond the electrode bar 140 and is connected by a joint 143 to a connecting rod 144, the other end of which is connected to an eccentric 145 is.
  • the electrode bar 130 is placed on the mesh mesh in the welding cycle and lifted off the mesh again.
  • the electrodes 130 are conductively connected to one another, so that the entirety of the electrodes 130 forms a passive current bridge.
  • the lower electrodes 131 are likewise arranged in a known manner along a machine-fixed bar 146 which extends across the machine width and are electrically insulated from this bar and also from one another.
  • the individual electrodes are conductively connected to the secondary sides of transformers, not shown, via flexible feed lines 147.
  • a third cam disk 150 interacts with two scanning rollers 151, 152. Each of these scanning rollers is arranged at the end of a two-armed lever 153, 154, which is wedged between its two arms on a shaft 155 and 156, respectively. The ends of the two-armed levers 153, 154 opposite the scanning rollers 151, 152 are connected to one another via a compression spring 157.
  • the cam disk 150 is shaped in such a way that the levers 153, 154 are always pivoted by the same angular amounts and in the same direction.
  • a one-armed lever 158 or 159 is connected, at the other end of which a bumper 160 or 161 is articulated.
  • the other ends of these bumpers 160, 161 are each connected to one of the beams 101, 102 on the side opposite the joints 105. Since, when the levers 153, 154 rotate in the same direction, for example the push rod 160 moves downward, but the push rod 161 moves upward, this lever system causes the bars 101, 102 to open and close around the joints 105.
  • the bumpers 160, 161 and the one-armed lever 116 must be parallel to one another in every movement phase of the beams 101, 1.02.
  • tere cam disks 170, 171 (Fig. 10) are provided which cooperate with scanning rollers 172, 173, which in Fig. 8 are in alignment with the scanning roller 152.
  • These scanning rollers are articulated at the lower ends of two-armed levers 174, 175, of which the lever 174 is freely rotatably mounted on the shaft 156, whereas the lever . 175 is mounted on its own shaft 176.
  • bumpers 177, 178 are articulated, which according to FIG. 9 are connected to shafts 181, 182 via levers 79, 180.
  • Components 183, 184 designed as control levers are connected in a rotationally fixed manner to the upper ends of the shafts 181, 182 and move the rails 83 from their rest position into their working position in order to carry out bending operations.
  • the control levers 183, 184 act against the rails 83 loaded by springs (not shown). These springs then also cause the rails 83 and the control lever 183 and their entire drive system to be reset as soon as the cams 170, 172 reset the control levers 183, 184 allow.
  • This last-described system thus takes over the function of the stops 81 and the cam tracks 82 of the embodiment of the invention shown in FIGS. 4 and 5.
  • This device works as follows: as soon as a feed and bending step has been completed, the levers 127, 128 pivot into the working position, the teeth 129 engage in the crest of adjacent wires located in the welding area and center them so that the crest of the adjacent wires - from to which one of the wire coulters 4 and the other of the wire coulters 7 belong - overlap by a predetermined amount.
  • the eccentrics 145 now move the connecting rods 144 downward, as a result of which the electrode bar 140 articulated on the levers 141, 142 is also moved downward and the electrodes 130 are pressed against the weld metal. After switching on the welding current, a welding is carried out.
  • the elements 150 to 161 are actuated in such a way that the beams 101, 102 are pivoted in opposite directions about the joints 105, moving away from one another.
  • the preferred pins 103, 104 and the deflection pins 86 disengage from the already bent wires of the wire shares 4 and 7.
  • the elements 112 to 117 cause the relaxing spring 114 to move the bars 101, 102 in FIG. 8 from right to left , wherein the clamps 106, 107 slide along the wires of the wire shares 4 and 7, so to speak, in idle mode.
  • control levers 183, 184 are controlled via the elements 170 to 175 and 177 to 182 in such a way that they can yield to the action of the springs loading the rails 83 and thus return the rails 83 to their rest position allow.
  • the elements 150 to 161 again cause the bars 101, 102 to close again by means of a pivoting movement about the joints 105 which is opposite to the first mentioned.
  • the preferred pins 103, 104 engage in the already formed shaft crests of the wires and the in Diverter pins 82 located in the rest position come to lie laterally next to the wires that are just tapering and assigned to them.
  • the teeth 129 are disengaged from the grid by the action of the elements 120 to 127 and at the same time the electrodes 130 are also raised above the elements 140 to 145 and now give in turn the grid is free again.
  • the elements 112 to 117 now begin to move the bars 101, 102 in FIG. 8 from left to right.
  • the clamping devices 106, 107 grip the incoming wires and take them with them as they move.
  • the preferred pins 103, 104 engaging in the already formed wave crests of the wires advance the already bent wires through the guide 20 to the welding station.
  • the control lever 184 is activated via the evenly numbered elements 172 to 182 and then, starting from the cam disc 171, the control lever 183 is activated via the odd numbered elements 173 to 181.
  • devices according to the invention can also be used for the production of support infills and the like.
  • devices according to the invention can also be used for the production of support infills and the like.
  • any other type of connection of the overlapping vertices of the deformed wires can also be used, for example by gluing, by connection by means of clamping elements or the like.

Description

Die Erfindung betrifft eine Vorrichtung zum zickzackförmigen Biegen parallel zueinander in einer Ebene vorgeschobener gerader Drähte mit Hilfe von quer zur Drahtschar verschiebbaren Schienen, welche in den Drahtabständen entsprechenden Abständen Drahtumlenkstifte tragen und während einer Arbeitsbewegung in Drahtvorschubrichtung mittels einer Steuereinrichtung alternierend gegensinnig quer zu dieser Richtung bewegt werden.The invention relates to a device for zigzag-shaped bending parallel to one another in a plane of straight wires with the aid of rails which can be displaced transversely to the wire coulter and which carry wire deflecting pins at the appropriate intervals and are moved alternately in opposite directions transversely to this direction during a working movement in the wire feed direction by means of a control device .

Vorrichtungen dieser Gattung werden insbesondere für Maschinen zum Herstellen von sogenannten Diagonalgittern benötigt, in welchen zwei Scharen von alternierend gegensinnig zickzackförmig gebogenen Drähten erzeugt und jeweils zwei benachbarte dieser Drähte an den einander zugekehrten und gegebenenfalls einander sogar etwas überlappenden Wellenscheiteln miteinander verbunden werden.Devices of this type are required in particular for machines for producing so-called diagonal grids, in which two groups of alternately oppositely zigzag-shaped wires are produced and two adjacent ones of these wires are connected to each other on the facing and possibly even slightly overlapping wave crests.

Bei einer aus der FR-A-1 075 191 bekannten Vorrichtung der einleitend angegebenen Gattung sind die die Umlenkstifte tragenden Schienen in gleichen Winkelabständen am Umfang einer Walze angeordnet und parallel zur Walzenachse verschiebbar. Durch seitlich der Walze angeordnete, an den Schienenenden angreifende Steuerkurvenbahnen werden jeweils mehrere Schienen alternierend gegensinnig derart verschoben, dass die Drähte in Abständen von entgegengesetzten Seiten her erfasst, unter Zugspannung gesetzt und unter Gleitbewegung an den Stiften in zunehmendem Ausmass zickzackförmig um diese gebogen werden. Durch die mit erheblicher Reibungsarbeit verbundene Gleitbewegung der Drähte an den Umlenkstiften während jedes Biegevorganges werden die Stifte und Drähte stark beansprucht und der Biegevorgang erstreckt sich jeweils über ein längeres Drahtstück, so dass nicht nur ein starker Verschleiss der Umlenkstifte und die Gefahr des Reissens der Drähte auftritt, sondern auch die Biegestellen infolge unkontrollierbaren Rückfederns der Drähte ungleichmässig ausfallen. Aus auf diese Weise gebogenen Drähten hergestellte Diagonalgitter würden daher nicht einwandfrei rhombische Maschen aufweisen.In a device of the type specified in the introduction, which is known from FR-A-1 075 191, the rails carrying the deflection pins are arranged at equal angular intervals on the circumference of a roller and can be displaced parallel to the roller axis. By means of control cam tracks arranged on the side of the roller and engaging on the rail ends, several rails are alternately shifted in opposite directions in such a way that the wires are gripped at intervals from opposite sides, placed under tensile stress, and are increasingly bent around the pins in a zigzag fashion while sliding on the pins. Due to the sliding movement of the wires on the deflecting pins, which involves considerable friction work, the pins and wires are subjected to great stress during each bending process, and the bending process extends over a longer piece of wire, so that not only is there excessive wear on the deflecting pins and the risk of the wires breaking , but also the bending points are uneven due to uncontrollable springback of the wires. Diagonal grids made from wires bent in this way would therefore not have perfect rhombic meshes.

Die Erfindung befasst sich deshalb mit der Aufgabe, bei einer Biegevorrichtung der einleitend angegebenen Gattung die geschilderten Nachteile dadurch zu beseitigen, dass ein Gleiten der Drähte an den Umlenkstiften bei den Biegevorgängen vermieden wird und die Drähte daher walkfrei um die Umlenkstifte gebogen werden.The invention is therefore concerned with the task of eliminating the disadvantages described in a bending device of the type specified in the introduction by preventing the wires from sliding on the deflection pins during the bending processes and therefore bending the wires around the deflection pins without any walk.

Diese Aufgabe wird erfindungsgemäss dadurch gelöst, dass jede der die Umlenkstifte tragenden Schienen an den Enden von mindestens zwei gleich langen, parallelen und schwenkbar gelagerten Tragarmen angelenkt ist, deren Schwenkachsen senkrecht zur Biegeebene verlaufen und zumindest angenähert in einer Flucht mit den Mittelpunkten von Schmiegekreisen jener Evolution angeordnet sind, welche von Umlenkstifte aufeinanderfolgender Schienen tangierenden Drahtabschnitten vorgegebener Länge beschrieben werden, und dass mittels der Steuereinrichtung für jeden Biegevorgang jeweils nur eine Schiene, und zwar um die volle Amplitude der gewünschten Zickzackform und unter gleichzeitiger Verschwenkung ihrer Tragarme querverschiebbar ist.This object is achieved according to the invention in that each of the rails carrying the deflection pins is articulated at the ends of at least two equally long, parallel and pivotably mounted support arms, the pivot axes of which are perpendicular to the bending plane and at least approximately in alignment with the centers of nestling circles of that evolution are arranged, which are described by deflecting pins of successive rails tangent wire sections of a given length, and that by means of the control device only one rail for each bending operation, namely by the full amplitude of the desired zigzag shape and with simultaneous pivoting of its support arms.

Bei einer erfindungsgemässen Vorrichtung tritt bei jedem Biegevorgang eine relative Abwälzbewegung des Umlenkstiftes am Draht auf, die keine Gleitkomponente enthält, so dass ein Walken der Drähte an den Biegestellen vermieden wird.In a device according to the invention, a relative rolling movement of the deflection pin on the wire occurs that does not contain any sliding component, so that flexing of the wires at the bending points is avoided.

Es sei an dieser Stelle erwähnt, dass in der AT-B-317 646 eine Vorrichtung zum Biegen von insbesondere als Ausfachung von Gitterträgern bestimmten Strebenschlangen beschrieben ist, bei welcher ein walkfreier Biegevorgang dadurch erzielt werden soll, dass der Schwenkpunkt des Trägers des aktiven Biegewerkzeuges auf der Mittelsenkrechten der Verbindungsgeraden der Mittelpunkte des aktiven Biegewerkzeuges bei Beginn und am Ende des Biegevorganges liegt. Damit sich hiebei tatsächlich ein walkfreies Biegen ergibt, muss der Arbeitsbewegung des jeweils aktiven Biegewerkzeuges eine Abwälzbewegung an dem zu biegenden Stab überlagert werden, so dass es sich während des Biegevorganges um einen dem Biegewinkel gegengleichen Winkel dreht.It should be mentioned at this point that AT-B-317 646 describes a device for bending strut snakes which are in particular intended as infill of lattice girders, in which a walk-free bending process is to be achieved in that the pivot point of the girder of the active bending tool is on the center perpendicular of the connecting straight line of the center points of the active bending tool at the beginning and at the end of the bending process. In order for bending-free bending to actually occur, a rolling movement on the rod to be bent must be superimposed on the working movement of the respectively active bending tool, so that it rotates during the bending process by an angle that is the same as the bending angle.

Durch die vorliegende Erfindung wird hingegen auf einfache Weise ein walkfreies Biegen aller Drähte einer beliebig grossen Drahtschar um bezüglich ihrer Tragschiene feststehende Umlenkstifte ermöglicht, wodurch die Biegevorrichtung, insbesondere wenn die Anzahl der Drähte in der Drahtschar, etwa für die Erzeugung breiter Diagonalgitter, sehr gross ist, wesentlich einfacher und betriebssicherer gestaltet werden kann.The present invention, on the other hand, enables a walk-free bending of all wires of an arbitrarily large wire coulter around deflection pins which are fixed with respect to their mounting rail, as a result of which the bending device, in particular if the number of wires in the wire coulter, for example for the production of wide diagonal gratings, is very large , can be made much simpler and more reliable.

Bei einer Vorrichtung, bei welcher die Schienen in gleichmässigen gegenseitigen Abständen am Umfang einer Walze angeordnet sind, verlaufen die Schwenkachsen der Tragarme der Schienen erfindungsgemäss radial zu der Walze und sind in Achsrichtung von Schiene zu Schiene um die halbe Teilung der Reihe von Umlenkstiften gegeneinanderversetzt.In a device in which the rails are arranged at equal mutual distances on the circumference of a roller, the pivot axes of the support arms of the rails run radially to the roller according to the invention and are offset from one another in the axial direction from rail to rail by half the division of the row of deflection pins.

Bei einer anderen Ausführungsform der Erfindung sind die Schwenkachsen der Tragarme von zumindest zwei Schienen in einem in Drahtvorschubrichtung hin- und rückläufig bewegbaren Bauteil gelagert und die Umlenkstifte der Schienen sind jeweils am Ende eines Biegevorganges aus der Biegeebene entfernbar, z.B. durch Verschwenken oder Heben des die Schienen tragenden Bauteils, um nach jedem Biegevorgang die rückläufige Bewegung des schienenartigen Bauteils zu ermöglichen.In another embodiment of the invention, the pivot axes of the support arms of at least two rails are mounted in a component that can be moved back and forth in the wire feed direction, and the deflection pins of the rails can be removed from the bending plane at the end of a bending process, e.g. by pivoting or lifting the component supporting the rails in order to enable the rail-like component to move backwards after each bending operation.

Weitere Merkmale der Erfindung und deren Anwendung bei einer Maschine zum Herstellen von sogenannten Diagonalgittern gehen aus der nachfolgenden Beschreibung von Ausführungsbeispielen unter Bezugnahme auf die Zeichnungen hervor. Es zeigt

  • Fig. 1 eine Seitenansicht einer Gitterherstellungsmaschine mit einer Vorrichtung nach der Erfindung im Schnitt;
  • Fig. 2 eine Ansicht der gleichen Maschine von der Drahteinlaufseite her;
  • Fig. 3 einen Schnitt durch eine Formwalze;
  • Fig. 4 die zugehörige Einrichtung zum Verschieben der Schienen längs der Formwalze in Ansicht;
  • Fig. 5 eine Draufsicht zu Fig. 4;
  • Fig. 6 die Abwicklung der Steuerkurvenbahn nach den Fig. 4 und 5;
  • Fig. 7 die Kinematik der Biegevorgänge;
  • Fig. 8 in Seitenansicht eine zweite Gitterherstellungsmaschine mit einer anderen Vorrichtung nach der Erfindung;
  • Fig. 9 eine Draufsicht auf die zugehörige Einrichtung zum Verschieben der Schienen und
  • Fig. 10 in Ansicht die Steuerkurvenanordnung der Maschine nach Fig. 8.
Further features of the invention and its use in a machine for producing so-called diagonal grids are evident from the following description of exemplary embodiments with reference to the drawings. It shows
  • Figure 1 is a side view of a grid manufacturing machine with a device according to the invention in section.
  • Figure 2 is a view of the same machine from the wire entry side.
  • 3 shows a section through a shaping roller;
  • Figure 4 shows the associated device for moving the rails along the forming roll in view.
  • Fig. 5 is a plan view of Fig. 4;
  • 6 shows the development of the cam track according to FIGS. 4 and 5;
  • 7 shows the kinematics of the bending processes;
  • Fig. 8 is a side view of a second grating machine with another device according to the invention;
  • Fig. 9 is a plan view of the associated device for moving the rails and
  • 10 is a view of the cam arrangement of the machine according to FIG. 8.

In einem Maschinengestell 1 ist ein unterer Querbalken 2 angeordnet, längs welchem Dressurvorrichtungen 3 für die Drähte einer Drahtschar 4 vorgesehen sind. Auf einem zweiten, oberen Querbalken 5 sind die Dressurvorrichtungen 6 für die Drähte einer zweiten Drahtschar 7 angeordnet. Die beiden Drahtscharen 4 und 7 werden über Umlenkwalzen 8, 9 von nicht dargestellten Ablauftrommeln abgezogen, von unten bzw. oben her in eine gemeinsame Vertikalebene geführt und von dort nach Verformen mittels Formwalzen 15, 16 einer Gitterherstellungsmaschine zugeführt. In der Ansicht nach Fig. 2 sind die Umlenkwalzen 8, 9 fortgelassen worden, um die Übersicht nicht zu stören.A lower crossbeam 2 is arranged in a machine frame 1, along which dressage devices 3 are provided for the wires of a wire coulter 4. The dressage devices 6 for the wires of a second wire coulter 7 are arranged on a second, upper crossbar 5. The two wire coulters 4 and 7 are drawn off from discharge drums (not shown) via deflecting rollers 8, 9, guided from below or above into a common vertical plane and, from there, after being deformed by means of shaping rollers 15, 16, are fed to a lattice production machine. In the view according to FIG. 2, the deflecting rollers 8, 9 have been omitted so as not to disturb the overview.

An dem Querbalken 2 sind zwei Ständer 13, 14 angeordnet, in denen die beiden Formwalzen 15, 16 drehbar gelagert sind. Der Antrieb für die Formwalzen und alle anderen Elemente der Maschine erfolgt von einem Motor 17 über nur angedeutete Zahnradgetriebe 18.On the cross bar 2, two stands 13, 14 are arranged, in which the two form rollers 15, 16 are rotatably mounted. The drive for the forming rolls and all other elements of the machine is carried out by a motor 17 via gearwheels 18 only indicated.

Die Drähte der beiden Drahtscharen 4 und 7 werden an den ihnen zugeordneten Formwalzen 15 bzw. 16 umgelenkt, wobei jeder Draht, wie aus Fig. 2 erkennbar ist und später noch genauer erläutert wird, längs des Walzenumfanges zickzackförmig gebogen wird. Die beiden auf diese Weise entstehenden, einander zugeordneten zickzackförmigen Drahtschlangen, von denen eine längs des Umfanges der Formwalze 16 und die andere längs des Umfanges der Formwalze 15 verläuft, liegen einander am Ende ihres Umlenkweges derart auf den beiden Formwalzen gegenüber, dass sich ihre einander zugekehrten Wellenscheitel um ein geringes Mass übergreifen.The wires of the two sets of wires 4 and 7 are deflected on the shaping rolls 15 and 16 assigned to them, each wire, as can be seen in FIG. 2 and will be explained in more detail later, is bent in a zigzag shape along the circumference of the roll. The two zigzag-shaped wire coils created in this way, one of which runs along the circumference of the shaping roller 16 and the other along the circumference of the shaping roller 15, lie opposite one another at the end of their deflection path on the two shaping rollers in such a way that they face each other Spread over the crest of the shaft by a small amount.

In konvergierenden Führungen 20 werden die Schar der von der oberen Formwalze 16 und die Schar der von der unteren Formwalze 15 ausgeformten und tangential von den Formwalzen abgezogenen Drahtschlangen in eine gemeinsame Ebene und zwischen Verbindungswerkzeuge einer Gitterherstellungsmaschine geführt, mittels welcher die einander zugekehrten, sich etwas übergreifenden Scheitel benachbarter Drahtschlangen der beiden Scharen miteinander verbunden werden, so dass ein Gitter mit im wesentlichen rhombischen Maschen entsteht.In converging guides 20, the family of wire coils formed by the upper form roller 16 and the family of wire coils formed by the lower form roller 15 and drawn off tangentially by the form rollers are guided into a common plane and between connecting tools of a lattice production machine, by means of which the mutually facing, somewhat overlapping Vertices of adjacent wire coils of the two shares are connected to one another, so that a grid with essentially rhombic meshes is formed.

Im vorliegenden Ausführungsbeispiel der Erfindung wurde angenommen, dass benachbarte Drahtschlangen nahe ihren Scheitelpunkten durch Rollenelektroden 21, 22 verschweisst werden.In the present exemplary embodiment of the invention, it was assumed that adjacent wire coils are welded near their vertices by roller electrodes 21, 22.

Die Rollenelektroden 21,22 sind in Abständen und parallel zueinander längs Wellen 23, 24 angeordnet, die in seitlichen Scheiben 25, 26 gelagert sind. Die Scheiben 25 sind starr an einem sich über die Maschinenbreite erstreckenden Balken 27 befestigt. Die Scheiben 26 sind im wesentlichen dreieckfömig ausgebildet und je an einem ihrer Eckpunkte über ein Gelenk 28 mit einem Träger 29 verbunden, der seinerseits an einem sich quer über die Maschinenbreite erstreckenden Balken 30 befestigt ist. Einer der Balken 27 oder 30 kann noch durch nicht dargestellte, weil allgemein bekannte Mittel in seiner Höhenlage verstellbar ausgebildet sein, um den Abstand zwischen den Rollenelektroden 21, 22 unterschiedlichen Drahtdurchmessern anpassen zu können.The roller electrodes 21, 22 are arranged at intervals and parallel to one another along shafts 23, 24 which are mounted in side disks 25, 26. The disks 25 are rigidly attached to a beam 27 extending across the machine width. The disks 26 are essentially triangular in shape and are each connected at one of their corner points via a joint 28 to a support 29 which in turn is fastened to a beam 30 which extends across the machine width. One of the bars 27 or 30 can also be designed to be adjustable in height by means not shown because generally known means, in order to be able to adapt the distance between the roller electrodes 21, 22 to different wire diameters.

Der dritte Eckpunkt jeder Scheibe 26 ist durch ein Gelenk 31 mit einer einstellbaren Druckfeder 32 verbunden, mit deren Hilfe der Anpressdruck der Rollenelektroden 22 an die Drahtkreuzungspunkte den Erfordernissen entsprechend eingestellt werden kann. Überdies sind die Rollenelektroden 22 mittels biegsamer Zuleitungen 33 abwechselnd mit den beiden Polen der Sekundärseite von Schweisstransformatoren 34 verbunden. Wie dies bei Schweissmaschinen bereits bekannt ist, sind benachbarte obere Rollenelektroden 22 voneinander elektrisch isoliert, wogegen die unteren Rollenelektroden 21 leitend miteinander verbunden sind und so eine passive Strombrücke bilden.The third corner point of each disk 26 is connected by a joint 31 to an adjustable compression spring 32, with the aid of which the contact pressure of the roller electrodes 22 on the wire crossing points can be adjusted as required. In addition, the roller electrodes 22 are alternately connected to the two poles of the secondary side of welding transformers 34 by means of flexible supply lines 33. As is already known in welding machines, adjacent upper roller electrodes 22 are electrically insulated from one another, whereas the lower roller electrodes 21 are conductively connected to one another and thus form a passive current bridge.

Den Gittertransport bewerkstelligen Greifhaken 41, 42, die an quer über die Maschinenbreite verlaufenden Balken 43, 44 befestigt sind. In die Endteile der Balken 43, 44 greifen Lagerzapfen ein, die an den einen Enden von einarmigen Hebeln 45, 46 angeordnet sind; die anderen Enden dieser einarmigen Hebel sind drehfest mit Wellen 47, 48 verbunden. Über nicht gezeigte Nockenantriebe werden die Wellen 47, 48 in hin- und hergehende Schwenkbewegungen versetzt, und zwar derart, dass sich das den Balken 43 tragende Ende des einarmigen Hebels 45 jeweils von den Rollenelektroden 21, 22 wegbewegt, während sich das den Balken 44 tragende Ende des einarmigen Hebels 46 zu den Rollenelektroden 21, 22 hinbewegt, und umgekehrt.Gripping hooks 41, 42, which are attached to beams 43, 44 running across the width of the machine, carry out the lattice transport. In the end parts of the beams 43, 44 engage trunnions which are arranged at one end of one-armed levers 45, 46; the other ends of these one-armed levers are rotatably connected to shafts 47, 48. The camshafts 47, 48 are set in reciprocating pivoting movements via cam drives, not shown, in such a way that the end of the one-armed lever 45 carrying the bar 43 moves away from the roller electrodes 21, 22, while the one carrying the bar 44 moves End of the one-armed lever 46 moved to the roller electrodes 21, 22, and vice versa.

Gleichzeitig werden über zwei einarmige Hebel 49, 51 und eine Stossstange 53, bzw. über zwei einarmige Hebel 50, 52 und eine Stossstange 54 die Balken 43, 44 um ihre Längsachsen verschwenkt, wobei jeweils der sich von den Rollenelektroden 21, 22 wegbewegende Balken - in der vorstehend angenommenen Arbeitsphase der Balken 43 - so verschwenkt wird, dass seine Greifhaken 41 mit den Gittermaschen in Eingriff gelangen, während gleichzeitig die Greifhaken 42 des anderen Balkens 44 ausser Eingriff mit dem Gitter geschwenkt werden, und umgekehrt. Die einarmigen Hebel 51, 52 sind zu diesem Zweck drehfest auf Wellen 55, 56 angeordnet, die über Nockenantriebe in hin- und hergehende Schwenkbewegungen versetzt werden.At the same time, the bars 43, 44 are pivoted about their longitudinal axes via two single-arm levers 49, 51 and a bumper 53, or via two single-arm levers 50, 52 and a bumper 54, the bars moving away from the roller electrodes 21, 22 in each case - in the working phase assumed above, the beam 43 is pivoted such that its gripping hooks 41 engage the mesh meshes, while at the same time the gripping hooks 42 of the other beam 44 are pivoted out of engagement with the mesh, and vice versa. For this purpose, the one-armed levers 51, 52 are arranged in a rotationally fixed manner on shafts 55, 56, which are set into reciprocating pivoting movements via cam drives.

Der Antrieb der eigentlichen Verformungswerkzeuge wird von einem Exzenter 71 abgenommen und von einer Pleuelstange 72 auf den einen Arm eines Winkelhebels 73 übertragen, an dessen anderem Arm eine Stossstange 74 angelenkt ist. Die Stossstange 74 ist gemäss Fig. 2 mit den einen Armen zweier weiterer Winkelhebel 75, 76 gelenkig verbunden, an deren anderen Armen das Ende je einer weiteren Stossstange 77, 78 angelenkt ist. Die den Winkelhebeln 75, 76 gegenüberliegenden Enden der Stossstangen 77, 78 sind mit Schwingen 79, 80 gelenkig am Ständer 13 befestigt.The drive of the actual deformation tools is removed from an eccentric 71 and transmitted from a connecting rod 72 to one arm of an angle lever 73, on the other arm of which a bumper 74 is articulated. 2 is articulated to one arm of two further angle levers 75, 76, on the other arms of which the end of another bumper 77, 78 is articulated. The ends of the bumpers 77, 78 opposite the angle levers 75, 76 are articulated to the stand 13 with rockers 79, 80.

Nahe ihren beiden Enden weisen die Stossstangen 77, 78 gemäss den Fig. 4 und 5 als Anschläge wirkende Bauteile 81 auf, die in Arbeitsstellung teilweise in eine Steuerkurvenbahn 82 eingreifen. Eine derartige Steuerkurvenbahn 82 befindet sich an beiden Enden jeder der beiden Formwalzen 15, 16, und die Enden von längs des Umfanges der Formwalzen 15, 16 angeordneten Schienen 83 kommen abwechselnd, die eine Schiene mit der auf der rechten Seite der Maschine befindlichen Steuerkurvenbahn und die nächste Schiene mit der auf der linken Seite der Maschine befindlichen Steuerkurvenbahn, mittels Führungsrollen in Eingriff.Near their two ends, the bumpers 77, 78 according to FIGS. 4 and 5 have components 81 which act as stops and which partially engage in a cam track 82 in the working position. Such a cam track 82 is located at both ends of each of the two molding rolls 15, 16, and the ends of rails 83 arranged along the circumference of the molding rolls 15, 16 come alternately, the one track with the cam track on the right side of the machine and the the next rail engages with the cam track on the left side of the machine, by means of guide rollers.

Jede der Schienen 83, längs welcher in Abständen Umlenkstifte 86 für je einen Draht vorgesehen sind, ist gemäss Fig. 3 an den einen Enden von zumindest zwei parallelen, gleich langen Tragarmen 84 angelenkt, deren andere Enden an radial in den Formwalzen 15, 16 angeordneten und drehbaren Lagerzapfen 85 befestigt sind.Each of the rails 83, along which deflection pins 86 are provided at intervals for one wire each, is articulated according to FIG. 3 to one end of at least two parallel, equally long support arms 84, the other ends of which are arranged radially in the shaping rollers 15, 16 and rotatable journal 85 are attached.

Sobald bei gleichmässig fortschreitender Drehung der Formwalzen 15, 16 die Führungsrolle einer der Schienen 83 in den Verformungsbereich 82a der ihr zugeordneten Steuerkurvenbahn 82 gelangt, führt der zugeordnete Winkelhebel, beispielsweise der Winkelhebel 75 in Fig. 4, eine Schwenkbewegung aus, durch welche die Stossstange 77 zusammen mit ihrem Anschlag 81 in der Richtung und um den Betrag der gewünschten, der Verformung des Drahtes entsprechenden Parallelverschiebung der Schiene 83 verschoben wird. Der Anschlag 81 der Stossstange 77 erfasst bei dieser Bewegung die Führungsrolle der Schiene und bringt sie in ihre neue Lage auf dem erhabenen Teil der Steuerkurvenbahn 82.As soon as the guide roller of one of the rails 83 arrives in the deformation region 82a of the control cam track 82 assigned to it when the shaping rolls 15, 16 rotate steadily, the assigned angle lever, for example the angle lever 75 in FIG. 4, executes a pivoting movement through which the bumper 77 is moved together with its stop 81 in the direction and by the amount of the desired parallel displacement of the rail 83 corresponding to the deformation of the wire. During this movement, the stop 81 of the bumper 77 grasps the guide roller of the rail and brings it into its new position on the raised part of the cam track 82.

Eine der Voraussetzungen, eine Verformung der Drähte zu erzwingen, ohne dass diese längs der in Abständen angeordneten Umlenkstifte 86 einer der Schienen 83 gleiten, besteht darin, dass in einem gegebenen Zeitinterval stets nur eine einzige der Schienen 83 parallel zu sich selbst verschoben wird, während die übrigen Schienen in Ruhe sind. Die Parallelverschiebungen der einzelnen Schienen müssen daher nacheinander und jeweils um einen Betrag erfolgen, der gleich der Amplitude der gewünschten Zickzackform der Drähte ist, und sie müssen überdies während eines Zeitraumes erfolgen, während dessen die Formwalzen 15, 16 einen Winkel durchlaufen, der gleich jenem Bruchteil eines Vollkreises ist, welcher sich durch Teilung des Vollkreises durch die Anzahl der längs des Umfanges einer Formwalze angeordneten Schienen 83 ergibt.One of the prerequisites for forcing the wires to deform without sliding along the spaced diverter pins 86 of one of the rails 83 is that only a single one of the rails 83 is always displaced parallel to itself during a given time interval the other rails are at rest. The parallel displacements of the individual rails must therefore take place successively and in each case by an amount which is equal to the amplitude of the desired zigzag shape of the wires, and moreover must take place during a period during which the shaping rollers 15, 16 pass through an angle which is equal to that fraction is a full circle, which results from dividing the full circle by the number of rails 83 arranged along the circumference of a shaping roller.

Im Hinblick auf dieses Erfordernis kann es vorkommen, dass der auch von der gewünschten Gittermaschenform abhängige Verformungsbereich 82a der Steuerkurvenbahn mit den in Umlaufrichtung der Formwalzen vor und hinter ihm liegenden Bahnabschnitten einen so steilen Winkel einschliesst, dass dieser Bereich der Steuerkurvenbahn von den Führungsrollen der Schienen 83 infolge Selbsthemmung ohne Mitwirkung der beweglichen Anschläge 81 nicht durchlaufen werden könnte. Dies ist besonders deutlich aus der in Fig. 6 dargestellten Abwicklung der Steuerkurvenbahn 82 erkennbar.In view of this requirement, it can happen that the deformation region 82a of the cam track, which also depends on the desired mesh shape, with the track sections lying in front of and behind it in the direction of rotation of the forming rolls, encloses such a steep angle that this area of the cam track is inclined from the guide rollers of the rails 83 could not be run due to self-locking without the participation of the movable stops 81. This can be seen particularly clearly from the development of the cam track 82 shown in FIG. 6.

Ferner erkennt man in Fig. 6 noch einen Abstand X, um den der Anschlag 81 überdieerforderlicheamplitude hinausbewegt wird, um einem Rückfedern des gebogenen Drahtes nach Entlastung durch die Umlenkstifte 86 Rechnung zu tragen. Schliesslich wird bei Passieren des Kurvenbereiches 82b durch sprunghaftes Zurückführen der Schiene 83 um einen kleinen Betrag ein reibungsloses, tangentielles Abheben der zickzackförmig gebogenen Drähte von den Umlenkstiften nach teilweiser Umschlingung der Formwalzen 15, 16 ermöglicht.A distance X can also be seen in FIG. 6 by which the stop 81 is moved beyond the required amplitude in order to take account of springback of the bent wire after relief by the deflection pins 86. Finally, when the curve region 82b is passed by a sudden amount of sudden return of the rail 83, a smooth, tangential lifting of the zigzag bent wires from the deflection pins is possible after the wrapping rollers 15, 16 have been partially wrapped around them.

Wie weiter aus Fig. 2 zu ersehen ist, sind die die Stossstangen 77, 78 betätigenden Arme der Winkelhebel 75, 76 und die Schwingen 79, 80 derart in einem Winkel zueinander angeordnet, dass stets jenes dieser Elemente, auf dessen Seite ein Anschlag 81 zum Parallelverschieben einer Schiene 83 tätig wird, aus einer in spitzem Winkel zur Umlaufebene der Formwalzen 15, 16 verlaufenden Ruhelage in eine Arbeitsstellung parallel zu dieser Umlaufebene verschwenkt wird. Durch diese Massnahme wird das in einem gegebenen Zeitpunkt zum Parallelverschieben einer der Schienen tätig werdende Ende der Stossstangen 77, 78 mit seinem zugeordneten Anschlag 81 gleichzeitig auch in Bewegungsrichtung der Schiene 83 angehoben, so dass die Anschläge 81 schmal ausgebildet werden können, weil sie sich auch in Umlaufrichtung mit der Formwalze mitbewegen und daher in der gleichen Steuerkurvenbahn 82 nachlaufende Führungsrollen weiterer Schienen 83 durch diese Anschläge nicht behindert werden. In Fig. 4 sind die beiden Extremlagen des Anschlages 81 in vollem Strich bzw. in unterbrochenem Strich gezeichnet.As can further be seen from FIG. 2, the arms of the angle levers 75, 76 which actuate the push rods 77, 78 and the rockers 79, 80 are arranged at an angle to one another such that that one of these elements, on the side of which a stop 81 for Parallel movement of a rail 83 is active, is pivoted from a rest position running at an acute angle to the circumferential plane of the forming rollers 15, 16 into a working position parallel to this circumferential plane. As a result of this measure, the end of the bumpers 77, 78 which becomes active at a given time for parallel displacement of one of the rails, with its associated stop 81, is also simultaneously raised in the direction of movement of the rail 83, so that the stops 81 can be made narrow because they are also move in the circumferential direction with the shaping roller and therefore guide rollers of further rails 83 following in the same cam track 82 are not hindered by these stops. 4, the two extreme positions of the stop 81 are drawn in full line or in broken line.

Anhand der Fig. 7 sei nun das optimale Biegen des Drahtes zwischen zwei aufeinanderfolgenden Umlenkstiften erläutert. Ein Umlenkstift 86a habe sich aus seiner nicht dargestellten Ausgangslage in seine in Fig. 7 gezeigte Endstellung bewegt. Der von diesem Umlenkstift erfasste Draht D kommt von einer der Umlenkwalzen 8, 9, tangiert den Stift 86a im PunktT1 und umschlingt ihn teilweise. In dem im Abstand lo vom Punkt T1 liegenden Punkt P1 wird der Draht D von dem noch in seiner Ruhelage Mb befindlichen nächsten Umlenkstift 86b berührt. Wird der Draht D, wie dargestellt, im Uhrzeigersinn um den bei dieser Bewegung bezüglich der Querrichtung X stillstehenden Umlenkstift 86a herumgeführt, dann durchläuft der betrachtete, längs des Drahtes D feste Punkt nacheinander die auf einer Evolute des Umfangskreises des Stiftes 86a liegenden Punkte P1-P2-P3, wobei die Länge 1 der Strecke T3-P3 nur r .arc tp kürzer als die Länge lo der Strecke T1-P1 ist.The optimal bending of the wire between two successive deflection pins will now be explained with reference to FIG. 7. A deflection pin 86a has moved from its initial position (not shown) into its end position shown in FIG. 7. The wire D gripped by this deflecting pin comes from one of the deflecting rollers 8, 9, touches the pin 86a at the point T1 and partially wraps around it. At the point P1 lying at a distance l o from the point T1, the wire D is touched by the next deflecting pin 86b, which is still in its rest position Mb. If the wire D, as shown, is moved clockwise around the deflection pin 86a which is stationary during this movement with respect to the transverse direction X, then the point under consideration, fixed along the wire D, successively passes through the points P1-P2 lying on an evolution of the circumferential circle of the pin 86a -P3, the length 1 of the section T3-P3 being only r .arc tp shorter than the length l o of the section T1-P1.

Soll diese Bewegung von dem zweiten Umlenkstift 86b hervorgerufen werden und dabei noch die Zusatzbedingung erfüllt werden, dass der Draht während der Bewegung nicht längs des Stiftes 86b gleiten darf, dann müssen die Punkte P1 bis P3 gleichzeitig auch auf einem Schmiegekreis an die Evolute liegen. Dies ist dann der Fall, wenn der Umlenkstift 86b auf einer Kreisbahn um einen Punkt M bewegt wird, der im Schnittpunkt von in den Mittelpunkten der Sehnen P1-P2 und P2-P3 errichteten Normalen liegt.If this movement is to be caused by the second deflecting pin 86b and the additional condition that the wire is not allowed to slide along the pin 86b during the movement is to be fulfilled, then points P1 to P3 must also lie on a conforming circle at the Evolute. This is the case when the deflection pin 86b is moved in a circular path around a point M which lies at the intersection of normals established in the centers of the chords P1-P2 and P2-P3.

Die Achsen der Lagerzapfen 85 der Tragarme 84, die jene Schiene 83 tragen, auf welcher die Umlenkstifte 86b angeordnet sind, müssen daher jene Erzeugende des Zylindermantels der Formwalze schneiden, auf der sich der Punkt M befindet, und die Achsen dieser Tragarme 84 müssen im Augenblick der Berührung der Drähte D durch die Lagerzapfen 86b parallel zu der Geraden M-Mb verlaufen.The axes of the journals 85 of the support arms 84, which carry the rail 83 on which the deflecting pins 86b are arranged, must therefore be the generatrix of the cylinder jacket of the forming roll intersect at point M, and the axes of these support arms 84 must run parallel to the line M-Mb at the moment of contact of the wires D through the journals 86b.

Die Fig. 8 bis 10 zeigen eine anderen Ausgestaltungsform einer Vorrichtung nach der Erfindung. Der eigentliche Biegevorgang geht bei dieser Ausführungsform nach dem gleichen Prinzip wie bei der in den Fig. 1 bis 7 gezeigten Ausführungsform vor sich, jedoch sind anstelle der Formwalzen 15, 16 zwei Balken 101, 102 vorgesehen, die parallel zu den Bewegungsebenen der ihnen in parallelen Ebenen zugeführten Drahtscharen 4, 7 vor- und zurückbewegt werden.8 to 10 show another embodiment of a device according to the invention. The actual bending process in this embodiment is based on the same principle as in the embodiment shown in FIGS. 1 to 7, but instead of the forming rolls 15, 16 two bars 101, 102 are provided, which are parallel to the planes of movement in parallel to them Layers of wire 4, 7 fed back and forth can be moved.

Auf jedem der beiden Balken 101, 102 sind mindestens zwei Paare von Lagerzapfen 85 vorgesehen, die in gleicherweise wie in den Fig. 3 bis 5 dargestellt an Tragarmen 84 Schienen 83 mit Umlenkstiften 86 tragen. Zusätzlich zu diesen beweglich angeordneten Umlenkstiften 86 sind an jedem der beiden Balken 101, 102 noch mindestens zwei Reihen von unbeweglich feststehenden Vorzugsstiften 103 angeordnet, die in bereits ausgeformte Abbiegestellen der Drähte der Drahtscharen 4, 7 eingreifen und dadurch die bereits verformten Drähte in konvergierende Führungen 20 und durch diese hindurch zur Schweissstation vorschieben.At least two pairs of bearing journals 85 are provided on each of the two beams 101, 102, which bear rails 83 with deflection pins 86 on support arms 84 in the same way as shown in FIGS. 3 to 5. In addition to these movably arranged deflection pins 86, at least two rows of immovably fixed preferred pins 103 are arranged on each of the two beams 101, 102, which engage in already formed bending points of the wires of the wire shares 4, 7 and thereby the already deformed wires in converging guides 20 and push it through to the welding station.

Die beiden Balken 101, 102 sind mit Hilfe von Gelenken 105 miteinander verbunden und können um diese Gelenke schwenkend wie die Backen einer Zange geöffnet und geschlossen werden. In der Drahtzuführungsrichtung vor den Gelenken 105 der Balken 101, 102 sind selbsttätige Klemmvorrichtungen 106, 107 - je eine für jeden zuzuführenden Draht - angeordnet, die bei der Vorwärtsbewegung der Balken 101, 102 die zulaufenden Drähte der Drahtscharen 4, 7 erfassen und von nicht dargestellten Ablaufhaspeln abziehen, bei der Rückwärtsbewegung der Balken 101,102 jedoch längs der Drähte gleiten, ohne sie mitzunehmen.The two beams 101, 102 are connected to one another by means of joints 105 and can be opened and closed pivoting about these joints like the jaws of a pair of pliers. In the wire feed direction in front of the joints 105 of the bars 101, 102 there are automatic clamping devices 106, 107 - one for each wire to be fed - which, when the bars 101, 102 move forward, grasp the incoming wires of the wire shares 4, 7 and are not shown Pull off the reel, but slide the bars 101, 102 backwards along the wires as you move them back without taking them with you.

Der gesamte Antrieb wird bei dieser Ausführungsform der Erfindung von einer motorisch angetriebenen Welle 110 abgenommen. Auf dieser Welle 110 sitzt eine erste Nockenscheibe 111 (Fig. 10), die einen einarmigen Hebel 112 über eine Abtastrolle 113 betätigt. Der durch eine Rückstellfeder 114 belastete einarmige Hebel 1 12 ist drehfest an dem Ende einer Welle 115 angeordnet, längs welcher zwei weitere einarmige Hebel 116 aufgekeilt sind. Die Hebel 116 greifen mit Gleitsteinen 117 in entsprechend geformte Schlitze im Gelenkbereich der Balken 101, 102 ein und erteilen diesen Balken die erwähnte, gemeinsame vor- und rückläufige Bewegung.In this embodiment of the invention, the entire drive is removed from a motor-driven shaft 110. A first cam disk 111 (FIG. 10) sits on this shaft 110 and actuates a one-armed lever 112 via a scanning roller 113. The one-armed lever 112 loaded by a return spring 114 is arranged in a rotationally fixed manner at the end of a shaft 115, along which two further one-armed levers 116 are wedged. The levers 116 engage with sliding blocks 117 in correspondingly shaped slots in the articulated region of the beams 101, 102 and give these beams the common forward and reverse movement mentioned.

Über eine zweite Nockenscheibe 120 (Fig. 10) und eine zugeordnete Abtastrolle 121 wird ein federbelasteter Winkelhebel 122 betätigt, der über eine Stossstange 123 auf einen Hebel 124 einwirkt. Der Hebel 124 ist drehfest mit einer Welle 125 verbunden, die über nur angedeutete Zahnräder mit einer zu ihr parallelen und mit ihr zusammenwirkenden Welle 126 auf Drehung verbunden ist.Via a second cam disk 120 (FIG. 10) and an associated scanning roller 121, a spring-loaded angle lever 122 is actuated, which acts on a lever 124 via a bumper 123. The lever 124 is connected in a rotationally fixed manner to a shaft 125, which is connected to a shaft 126, which is parallel to it and cooperates with it, for rotation via only indicated gear wheels.

Die beiden Wellen 125, 126 tragen eine Anzahl einarmiger Hebel 127, 128, die mit Zähnen 129 versehen sind, welche seitlich von Elektroden 130,131, und zwar bevor diese zur Wirkung gelangen, in die Gittermaschen eingreifen und dabei die sich übergreifenden und zum Verschweissen bestimmten Scheitelbereiche zweier zickzackförmig gebogener, einander benachbarter Drähte in die richtige Relativlage zueinander bringen. Nach dem Schweissvorgang schwenken die Hebel 127, 128 wieder in ihre Ruhelage zurück und geben die Gittermaschen für den Weitertransport des Gitters frei.The two shafts 125, 126 carry a number of one-armed levers 127, 128, which are provided with teeth 129, which engage laterally before electrodes 130, 131, and before they come into effect, into the grid meshes and thereby the overlapping and intended vertex areas for welding Bring two zigzag-shaped, adjacent wires into the correct relative position to each other. After the welding process, the levers 127, 128 swivel back into their rest position and release the grid mesh for the further transport of the grid.

Die Elektroden 130, 131 sind als längliche Schienen ausgebildet, um in der Lage zu sein, jeweils zwei Schweisspunkte von zwei benachbarten, sich mit ihren Wellenscheiteln übergreifenden, zu verschweissenden Drähten erfassen zu können. Die oberen Elektroden 130 sind in bekannter Weise in einem sich über die Maschinenbreite erstreckenden, auf- und abbeweglichen Elektrodenbalken 140 angeordnet und gegenüber diesem federnd abgestützt. Der Elektrodenbalken 140 ist an zwei gleich langen, parallelen, schwenkbar gelagerten Hebeln 141, 142 angelenkt, von welchen der Hebel 142 über den Elektrodenbalken 140 hinaus verlängert und durch ein Gelenk 143 mit einer Pleuelstange 144 verbunden ist, deren anderes Ende an einen Exzenter 145 angeschlossen ist. Dadurch wird der Elektrodenbalken 130 im Schweisstakt auf die Gittermaschen aufgesetzt und wieder von diesen abgehoben. Die Elektroden 130 sind untereinander leitend verbunden, so dass die Gesamtheit der Elektroden 130 eine passive Strombrücke bildet.The electrodes 130, 131 are designed as elongated rails in order to be able to detect two welding points each from two adjacent wires to be welded which overlap with their wave apices. The upper electrodes 130 are arranged in a known manner in an electrode bar 140 which extends and moves up and down over the machine width and is resiliently supported with respect thereto. The electrode bar 140 is articulated to two equally long, parallel, pivotably mounted levers 141, 142, of which the lever 142 extends beyond the electrode bar 140 and is connected by a joint 143 to a connecting rod 144, the other end of which is connected to an eccentric 145 is. As a result, the electrode bar 130 is placed on the mesh mesh in the welding cycle and lifted off the mesh again. The electrodes 130 are conductively connected to one another, so that the entirety of the electrodes 130 forms a passive current bridge.

Die unteren Elektroden 131 sind gleichfalls in bekannter Weise längs eines maschinenfesten und sich über die Maschinenbreite erstreckenden Balkens 146 angeordnet und gegenüber diesem Balken, sowie auch gegeneinander elektrisch isoliert. Über biegsame Zuleitungen 147 sind die einzelnen Elektroden mit den Sekundärseiten nicht dargestellter Transformatoren leitend verbunden.The lower electrodes 131 are likewise arranged in a known manner along a machine-fixed bar 146 which extends across the machine width and are electrically insulated from this bar and also from one another. The individual electrodes are conductively connected to the secondary sides of transformers, not shown, via flexible feed lines 147.

Eine dritte Nockenscheibe 150 (Fig. 10) wirkt mit zwei Abtastrollen 151, 152 zusammen. Jede dieser Abtastrollen ist am Ende eines zweiarmigen Hebels 153, 154 angeordnet, welcher zwischen seinen beiden Armen auf einer Welle 155 bzw. 156 aufgekeilt ist. Die den Abtastrollen 151, 152 gegenüberliegenden Enden der zweiarmigen Hebel 153, 154 sind über eine Druckfeder 157 miteinander verbunden. Die Nockenscheibe 150 ist derart geformt, dass die Hebel 153, 154 stets um gleiche Winkelbeträge und in gleichem Richtungssinn verschwenkt werden.A third cam disk 150 (FIG. 10) interacts with two scanning rollers 151, 152. Each of these scanning rollers is arranged at the end of a two-armed lever 153, 154, which is wedged between its two arms on a shaft 155 and 156, respectively. The ends of the two-armed levers 153, 154 opposite the scanning rollers 151, 152 are connected to one another via a compression spring 157. The cam disk 150 is shaped in such a way that the levers 153, 154 are always pivoted by the same angular amounts and in the same direction.

An den gegenüberliegenden Enden der Wellen 155, 156 ist je ein einarmiger Hebel 158 bzw. 159 angeschlossen, an dessen anderem Ende eine Stossstange 160 bzw. 161 angelenkt ist. Die anderen Enden dieser Stossstangen 160, 161 sind mit je einem der Balken 101, 102 auf der den Gelenken 105 gegenüberliegenden Seite verbunden. Da sich bei gleichsinniger Drehung der Hebel 153, 154 beispielsweise die Stossstange 160 nach unten, die Stossstange 161 jedoch nach oben bewegt, wird durch dieses Hebelsystem ein zangenartiges Öffnen und Schliessen der Balken 101, 102 um die Gelenke 105 bewirkt. Ergänzend sei noch erwähnt, dass die Stossstangen 160, 161 und der einarmige Hebel 116 in jeder Bewegungsphase der Balken 101, 1.02 parallel zueinander sein müssen.At the opposite ends of the shafts 155, 156 a one-armed lever 158 or 159 is connected, at the other end of which a bumper 160 or 161 is articulated. The other ends of these bumpers 160, 161 are each connected to one of the beams 101, 102 on the side opposite the joints 105. Since, when the levers 153, 154 rotate in the same direction, for example the push rod 160 moves downward, but the push rod 161 moves upward, this lever system causes the bars 101, 102 to open and close around the joints 105. In addition, it should also be mentioned that the bumpers 160, 161 and the one-armed lever 116 must be parallel to one another in every movement phase of the beams 101, 1.02.

Schliesslich sind auf der Welle 110 noch zwei weitere Nockenscheiben 170, 171 (Fig. 10) vorgesehen, die mit Abtastrollen 172, 173 zusammenwirken, welche in Fig. 8 in einer Flucht mit der Abtastrolle 152 liegen. Diese Abtastrollen sind an den unteren Enden zweiarmiger Hebel 174, 175 angelenkt, von denen der Hebel 174 frei drehbar auf der Welle 156 gelagert ist, wogegen der Hebel.175 auf einer eigenen Welle 176 gelagert ist. An den den Rollen 172, 173 gegenüberliegenden Armen der Hebel 174, 175 sind Stossstangen 177, 178 angelenkt, die gemäss Fig. 9 über Hebel 79,180 mit Wellen 181,182 verbunden sind.Finally, two more are on the shaft 110 tere cam disks 170, 171 (Fig. 10) are provided which cooperate with scanning rollers 172, 173, which in Fig. 8 are in alignment with the scanning roller 152. These scanning rollers are articulated at the lower ends of two-armed levers 174, 175, of which the lever 174 is freely rotatably mounted on the shaft 156, whereas the lever . 175 is mounted on its own shaft 176. On the arms 172, 173 opposite the arms of the levers 174, 175, bumpers 177, 178 are articulated, which according to FIG. 9 are connected to shafts 181, 182 via levers 79, 180.

Mit den oberen Enden der Wellen 181, 182 sind als Steuerhebel ausgebildete Bauteile 183, 184 drehfest verbunden, welche die Schienen 83 zur Durchführung von Biegevorgängen aus ihrer Ruhelage in ihre Arbeitsstellung verschieben. Die Steuerhebel 183, 184 wirken dabei gegen die von nicht dargestellten Federn belasteten Schienen 83. Diese Federn bewirken dann auch die Rückstellung der Schienen 83 sowie der Steuerhebel 183, und ihres gesamten Antriebssystems, sobald die Nocken 170, 172 eine Rückstellung der Steuerhebel 183, 184 gestatten. Dieses zuletzt beschriebene System übernimmt somit die Funktion der Anschläge 81 und der Steuerkurvenbahnen 82 der in den Fig. 4 und 5 gezeigten Ausführungsform der Erfindung.Components 183, 184 designed as control levers are connected in a rotationally fixed manner to the upper ends of the shafts 181, 182 and move the rails 83 from their rest position into their working position in order to carry out bending operations. The control levers 183, 184 act against the rails 83 loaded by springs (not shown). These springs then also cause the rails 83 and the control lever 183 and their entire drive system to be reset as soon as the cams 170, 172 reset the control levers 183, 184 allow. This last-described system thus takes over the function of the stops 81 and the cam tracks 82 of the embodiment of the invention shown in FIGS. 4 and 5.

Diese Vorrichtung arbeitet wie folgt: Sobald ein Vorschub und Biegeschritt vollendet ist, schwenken die Hebel 127, 128 in die Arbeitsstellung, die Zähne 129 greifen in die im Schweissbereich befindlichen Wellenkuppen benachbarter Drähte ein und zentrieren diese so, dass sich die Wellenscheitel benachbarter Drähte - von denen jeweils einer der Drahtschar 4 und der andere der Drahtschar 7 angehört - um ein vorgegebenes Mass übergreifen. Nun bewegen die Exzenter 145 die Pleuelstangen 144 nach unten, wodurch der an den Hebeln 141, 142 angelenkte Elektrodenbalken 140 gleichfalls nach unten bewegt und die Elektroden 130 gegen das Schweissgut gepresst werden. Nach Einschalten des Schweissstromes wird eine Schweissung ausgeführt.This device works as follows: as soon as a feed and bending step has been completed, the levers 127, 128 pivot into the working position, the teeth 129 engage in the crest of adjacent wires located in the welding area and center them so that the crest of the adjacent wires - from to which one of the wire coulters 4 and the other of the wire coulters 7 belong - overlap by a predetermined amount. The eccentrics 145 now move the connecting rods 144 downward, as a result of which the electrode bar 140 articulated on the levers 141, 142 is also moved downward and the electrodes 130 are pressed against the weld metal. After switching on the welding current, a welding is carried out.

Gleichzeitig werden die Elemente 150 bis 161 in solchem Sinne betätigt, dass die Balken 101, 102 sich voneinander entfernend gegensinnig um die Gelenke 105 verschwenkt werden. Die Vorzugstifte 103, 104 und die Umlenkstifte 86 gelangen ausser Eingriff mit den bereits gebogenen Drähten der Drahtscharen 4 und 7. Über die Elemente 112 bis 117 bewirkt die sich entspannende Feder 114 eine Bewegung der Balken 101, 102 in Fig. 8 von rechts nach links, wobei die Klemmen 106, 107 gewissermassen im Leerlauf längs der Drähte der Drahtscharen 4 und 7 entlanggleiten. Gleichzeitig mit dieser Bewegung der Balken 101, 102 werden über die Elemente 170 bis 175 und 177 bis 182 die Steuerhebel 183, 184 so gesteuert, dass sie der Wirkung der die Schienen 83 belastenden Federn nachgeben können und damit eine Rückstellung der Schienen 83 in ihre Ruhelage gestatten.At the same time, the elements 150 to 161 are actuated in such a way that the beams 101, 102 are pivoted in opposite directions about the joints 105, moving away from one another. The preferred pins 103, 104 and the deflection pins 86 disengage from the already bent wires of the wire shares 4 and 7. The elements 112 to 117 cause the relaxing spring 114 to move the bars 101, 102 in FIG. 8 from right to left , wherein the clamps 106, 107 slide along the wires of the wire shares 4 and 7, so to speak, in idle mode. Simultaneously with this movement of the beams 101, 102, the control levers 183, 184 are controlled via the elements 170 to 175 and 177 to 182 in such a way that they can yield to the action of the springs loading the rails 83 and thus return the rails 83 to their rest position allow.

Nach Erreichen ihrer in Fig. 8 linken Grenzlage bewirken die Elemente 150 bis 161 wieder ein Schliessen der Balken 101, 102 durch eine der ersterwähnten entgegengesetzte Schwenkbewegung um die Gelenke 105. Die Vorzugstifte 103, 104 greifen in bereits ausgeformte Wellenkuppen der Drähte ein und die in Ruhelage befindlichen Umlenkstifte 82 kommen seitlich neben den gerade zulaufenden, ihnen zugeordneten Drähten zu liegen. Sobald die Vorzugstifte 103, 104 wieder mit bereits verformten Drähten in Eingriff stehen, werden die Zähne 129 durch die Wirkung der Elemente 120 bis 127 ausser Eingriff mit dem Gitter gebracht und gleichzeitig werden die Elektroden 130 über die Elemente 140 bis 145 ebenfalls angehoben und geben nun auch ihrerseits das Gitter wieder frei.After reaching their limit position on the left in FIG. 8, the elements 150 to 161 again cause the bars 101, 102 to close again by means of a pivoting movement about the joints 105 which is opposite to the first mentioned. The preferred pins 103, 104 engage in the already formed shaft crests of the wires and the in Diverter pins 82 located in the rest position come to lie laterally next to the wires that are just tapering and assigned to them. As soon as the preferred pins 103, 104 are again engaged with already deformed wires, the teeth 129 are disengaged from the grid by the action of the elements 120 to 127 and at the same time the electrodes 130 are also raised above the elements 140 to 145 and now give in turn the grid is free again.

Von der Nockenscheibe 11 ausgehend beginnen nun die Elemente 112 bis 117 die Balken 101, 102 in Fig. 8 von links nach rechts zu bewegen. Die Klemmvorrichtungen 106, 107 erfassen die zulaufenden Drähte und nehmen sie bei ihrer Bewegung mit. Die in bereits ausgeformte Wellenkuppen der Drähte eingreifenden Vorzugstifte 103, 104 schieben die bereits gebogenen Drähte durch die Führung 20 zur Schweissstation vor. Von der nun tätig werdenden Nockenscheibe 170 ausgehend, wird über die geradzahlig bezifferten Elemente 172 bis 182 der Steuerhebel 184 in Tätigkeit gesetzt und sodann wird, von der Nockenscheibe 171 ausgehend, über die ungeradzahlig bezifferten Elemente 173 bis 181 der Steuerhebel 183 in Tätigkeit gesetzt. Diese beiden nacheinander tätig werdenden Steuerhebel bewegen die Schienen 83a, 83b im Sinne einer gegensinnigen Verformung der Drähte, wobei wieder wie bei der Ausführungsform nach den Fig. 1 bis 7, die die Steuerhebel tragenden Tragarme 84 um ihre Lagerzapfen 85 verschwenkt werden. Nach Abschluss des eben beschriebenen Verformungsvorganges beginnt der Zyklus von neuem.Starting from the cam disk 11, the elements 112 to 117 now begin to move the bars 101, 102 in FIG. 8 from left to right. The clamping devices 106, 107 grip the incoming wires and take them with them as they move. The preferred pins 103, 104 engaging in the already formed wave crests of the wires advance the already bent wires through the guide 20 to the welding station. Starting from the now active cam disc 170, the control lever 184 is activated via the evenly numbered elements 172 to 182 and then, starting from the cam disc 171, the control lever 183 is activated via the odd numbered elements 173 to 181. These two control levers acting one after the other move the rails 83a, 83b in the sense of an opposite deformation of the wires, whereby again, as in the embodiment according to FIGS. 1 to 7, the support arms 84 carrying the control levers are pivoted about their journals 85. After the deformation process just described has been completed, the cycle begins again.

Die dargestellten Ausführungs- und Anwendungsbeispiele der Erfindung lassen verschiedene Abwandlungen zu. Insbesondere können Vorrichtungen nach der Erfindung auch zur Herstellung von Trägerausfachungen und dgl. verwendet werden. Ferner kann bei Gitterherstellungsmaschinen anstelle der dargestellten Rollenelektroden für eine elektrische Widerstandsschweissung auch jede andere Art der Verbindung der einander übergreifenden Scheitel der verformten Drähte angewendet werden, etwa durch Kleben, durch Verbindung mittels Klemmelementen oder dgl.The illustrated exemplary embodiments and application examples of the invention allow various modifications. In particular, devices according to the invention can also be used for the production of support infills and the like. Furthermore, in lattice manufacturing machines, instead of the roller electrodes shown for electrical resistance welding, any other type of connection of the overlapping vertices of the deformed wires can also be used, for example by gluing, by connection by means of clamping elements or the like.

Claims (5)

1. Apparatus for bending straight wires fed coplanar in parallel with one another, into a zig-zag form by means of bars (83) adapted to be displaced transversely to said wire family, which bars carry wire- deflector pins (86) at intervals corresponding with the pitch of said wires and during a working movement in the wire feed direction are moved by means of a control device (72-78, 81, 82) alternately in opposite directions transversely to the feed direction, in particular for machines for the production of diagonal grids, characterized in that each bar (83) is hinged to the ends of at least two parallel, pivotally supported bearer arms (84) of equal length, the pivot axes (85) of said bearer arms being perpendicular to the plane of bend and at least approximately in alignment with centres (M) of osculating circles of those evolutes which are described by sections of wire of predetermined length (10) forming tangents to deflector pins (86a, 86b) of successive bars (83), and in that for each bending working stroke only one bar (83) at a time is displaced transversely by means of the control device (72-78, 81, 82), by a full amplitude of the desired zig-zag configuration and by pivoting its bearer arms (84) at the same time.
2. Apparatus according to claim 1, wherein said bars are arranged to uniform mutual intervals at the periphery of a roller, characterized in that said pivot axes (85) of the bearer arms (84) of said bars (83) extend radially of said roller and are offset axially from bar to bar with respect to one another by half the pitch of the row of deflector pins (86).
3. Apparatus according to claim 1, characterized in that said pivot axes (85) of said bearer arms (84) of at least two bars (83) are supported in a member (102) which is moveable forwards and backwards along the direction of feed of said wires and in that the deflector pins (86) of said bars (83) are adapted to be moved out of the plane of bend at the end of a bending working stroke, e.g. by pivoting or lifting the member (102) carrying said bars (83).
4. Apparatus according to one of the claims 1 to 3, characterized by members (81; 184) displaceable transversely for the transverse displacement of said bars (83) and engaging ends of said bars, in case in combination with control cam tracks (82).
5. Use of apparatuses according to one of the claims 1 to 4 in a machine for the production of diagonal grids, characterized in that on each side of the grid production plane one of such apparatuses is provided such that behind the same two symmetrical groups of wires are obtained bent alternately to zig- zag form in opposite direction, and in that connection devices are provided which connect two adjacent ones of these wires at adjacent, preferably overlapping, zig-zag crests by means of welding, glueing, clamping or the like.
EP81890172A 1980-12-02 1981-10-20 Apparatus for bending straight wires into a zig-zag form, in particular for machines for making diagonal network Expired EP0053601B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0588580A AT372632B (en) 1980-12-02 1980-12-02 DEVICE FOR ZIGZAG-SHAPED BENDING STRAIGHT WIRE, ESPECIALLY FOR MACHINES FOR THE PRODUCTION OF DIAGONAL GRIDS
AT5885/80 1980-12-02

Publications (2)

Publication Number Publication Date
EP0053601A1 EP0053601A1 (en) 1982-06-09
EP0053601B1 true EP0053601B1 (en) 1984-08-01

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EP81890172A Expired EP0053601B1 (en) 1980-12-02 1981-10-20 Apparatus for bending straight wires into a zig-zag form, in particular for machines for making diagonal network

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EP (1) EP0053601B1 (en)
JP (2) JPS57118838A (en)
AT (1) AT372632B (en)
DD (1) DD201859A5 (en)
DE (1) DE3165254D1 (en)

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JPS60142511A (en) * 1983-12-29 1985-07-27 株式会社村田製作所 Method and device for forming zigzag lead wiring
AT379973B (en) * 1984-01-13 1986-03-25 Evg Entwicklung Verwert Ges GRID WELDING MACHINE WORKING ON THE ELECTRIC RESISTANCE METHOD
AT383292B (en) * 1985-07-18 1987-06-10 Evg Entwicklung Verwert Ges DEVICE FOR CONTINUOUSLY PUSHING IN AND POSITIONING THE WIRE SHEET IN THE WELDING AREA OF A WELDING MACHINE FOR PRODUCING DIAGONAL GRIDS
DE4007204A1 (en) * 1990-03-07 1991-09-12 Otto Bihler MACHINING MACHINE, ESPECIALLY PUNCHING AND BENDING MACHINE KEYWORD: MACHINING MACHINE WITH BAR CONTROL
DE19752515A1 (en) * 1997-11-27 1999-06-02 Haeussler Planung Gmbh Method and machine for the production of rolled-up reinforcing bar mats
US20070095006A1 (en) * 2005-11-01 2007-05-03 Konersmann Ronald D Lightweight portable concrete enclosure and associated method of construction
CN113020347B (en) * 2021-03-09 2023-05-26 广东铭利达科技有限公司 Numerical control pipe bending machine

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Also Published As

Publication number Publication date
DE3165254D1 (en) 1984-09-06
EP0053601A1 (en) 1982-06-09
JPH0317572B2 (en) 1991-03-08
AT372632B (en) 1983-10-25
US4444227A (en) 1984-04-24
DD201859A5 (en) 1983-08-17
JPH01284444A (en) 1989-11-15
JPS57118838A (en) 1982-07-23
JPH0119982B2 (en) 1989-04-13
ATA588580A (en) 1983-03-15

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