EP0079587A1 - Wire-bending machine - Google Patents

Wire-bending machine Download PDF

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Publication number
EP0079587A1
EP0079587A1 EP19820110412 EP82110412A EP0079587A1 EP 0079587 A1 EP0079587 A1 EP 0079587A1 EP 19820110412 EP19820110412 EP 19820110412 EP 82110412 A EP82110412 A EP 82110412A EP 0079587 A1 EP0079587 A1 EP 0079587A1
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EP
European Patent Office
Prior art keywords
bending
mandrel
wire
central mandrel
central
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP19820110412
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German (de)
French (fr)
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EP0079587B1 (en
Inventor
Rossi Piergiorgio
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OEMB SA
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OEMB SA
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Priority to AT82110412T priority Critical patent/ATE18724T1/en
Publication of EP0079587A1 publication Critical patent/EP0079587A1/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21FWORKING OR PROCESSING OF METAL WIRE
    • B21F1/00Bending wire other than coiling; Straightening wire
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D11/00Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
    • B21D11/10Bending specially adapted to produce specific articles, e.g. leaf springs
    • B21D11/12Bending specially adapted to produce specific articles, e.g. leaf springs the articles being reinforcements for concrete
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00Cutting
    • Y10T83/869Means to drive or to guide tool
    • Y10T83/8772One tool edge of tool pair encompasses work [e.g., wire cutter]

Definitions

  • the invention relates to a wire bending machine with a central mandrel determining the bending axes and the radius of curvature, a shearing device arranged within the central mandrel and a retractable and extendable bending mandrel which can be moved on a circular path around the central mandrel by means of a bending plate, and a method for operating such a device.
  • a wire bending machine of this type is known, inter alia, from CH-A 592 481.
  • the machine described therein has the particular disadvantage that the bending mechanism cannot be adapted to different wire or rod cross sections, as is necessary, for example, when bending reinforcing bars in accordance with SIA standards.
  • the rapid changeover of processing to different bar cross-sections is a requirement for the economical use of such machines. It is therefore the task of creating a bending machine of the type mentioned at the outset, which allows the individual elements and the operating sequence to be rapidly adapted to the material to be processed.
  • This is achieved according to the invention in that the central mandrel and the shearing device together form an exchangeable one. Form a unit to adapt to changing wire diameters or radii of curvature.
  • a plurality of openings for receiving the bending mandrel are distributed at different intervals in order to adjust the radial position of the bending mandrel over the bending plate.
  • a cover plate with a radial recess for the bending mandrel preferably has a position-determining element which allows the angular position of the bending mandrel to be determined. With two sensors, which respond to the position determining element, an initial angular position can be determined in this way for each radial position of the bending mandrel on both sides of the wire feed device.
  • a method for its operation is characterized in that the bending mandrel is moved back in one of its two initial angular positions after execution of a bending in the retracted position and with simultaneous wire feed.
  • Fig. 1 shows in connection with Fig. 2 the basic structure of the wire bending machine.
  • the directional wire reaches the bending and shearing point 1 through a fixed wire feed channel 5 connected to the machine housing.
  • a bending mandrel 3 is the wire feeding direction by means of a rotatably driven bending plate 4 with respect to each 180 0 in the clockwise and counterclockwise.
  • the bending mandrel 3 penetrates the bending plate 4 and is screwed into a fastening disk 6 located behind it.
  • This is axially displaceable in guide members 7 (FIG. 3) with respect to the bending plate 4, as shown in broken lines in FIG. 1, as a result of which the bending mandrel 3 can be withdrawn from its working position.
  • the axial displacement of the mounting disc 6 takes place via an oil-hydraulic lever system, not shown.
  • the torque required for the bending is exerted by the bending plate 4 on the bending mandrel 3.
  • the bending plate 4 has a hollow cylindrical rear attachment, on which a drive gear 9 is seated between bearings 8 and is driven by a kinematic chain, which is not shown in detail.
  • the mandrel can independently perform a circular movement and an inward or outward movement. This will be explained in more detail later in connection with FIG. 5.
  • a shearing and ejection device 10 Arranged within the central mandrel 2 is a shearing and ejection device 10, which has an axis Direction with a certain stroke movable shear tool 12 which is driven via an actuating rod 13 by a hydraulic cylinder 11 (Fig. 1).
  • the shear tool 12 which has a reinforced flat shear surface, interacts with a sleeve 14 in the central mandrel 2, which is designed on the one hand as a wire guide and on the other hand as a counter knife.
  • the central arrangement of the shearing device 10 has the advantage that for the formation of the end section of a fully bent wire bracket, no retraction of the wire is necessary in the case of short end sections, as is the case with known bending machines, which have a shearing device arranged in front of the bending point.
  • a central arrangement of the shearing device hitherto prevented the bending machine from being adapted to the respective needs.
  • the bending radii which are primarily determined by the shape of the shaping jaws of the central mandrel 2, should be able to be adjusted depending on the wire or rod diameter (see the corresponding SIA standards).
  • the aforementioned adaptation of the bending machine therefore requires, among other things, easy interchangeability of the central mandrel 2, within which, as explained, the shearing device 10 is arranged.
  • the central mandrel is provided on the back with a hollow shaft 15, as can be seen in FIGS. 2 and 3.
  • the hollow shaft 15 has a thread 16 at the rear end, in which a corresponding mating thread of a holding tube 17 engages.
  • the holding tube 17, which is rotatably held in bearings 18, has a worm wheel 19 which can be driven by the motor 21 via a worm 20 (FIG. 1).
  • Another one A hand crank is provided, by means of which the worm 20 can be rotated by hand. If the central mandrel is to be replaced, the motor 21 is started up or rotated on the hand crank, as a result of which the holding tube 17 is set in rotation. Since the central mandrel and thus the hollow shaft 15 is secured against rotation by the wire feed channel 5, but is axially displaceable, the screw connection between the holding tube 17 and the hollow shaft 15 is loosened and the central mandrel 2 moves outward. The shear tool 12 is now connected to its actuating rod 13 (FIG.
  • the shear tool 12 is loaded to the rear by means of a spring 22. Its connection to the actuating rod 13 is ensured by radially displaceable bolts 23 which, when the hollow shaft 15 is advanced, are pressed into radial recesses 24 arranged therein by the spring force and thus release the connection.
  • a locking ring 25 ensures that the heavy tool 12 can be pulled out together with the central mandrel 2 after the screw connection has been completely loosened.
  • the insertion of another central mandrel 2 together with. a shearing tool 12 is done in a corresponding manner, the motor 21 being operated in the opposite direction of rotation.
  • Central mandrel 2 and shear tool 12 also form a unit insofar as they together form the shaping jaws, as can be seen in particular from FIG. 2.
  • the shaving tool 12 has guide projections 26 on the shaving head, which form part of the shaping jaws and are adapted to the radius of curvature thereof.
  • the cover plate 29 is otherwise freely rotatable with respect to the bending plate 4. In the area of the radial slot 30, it has a metal plate as position determining element 31 for influencing proximity switches 32, 33. Two such proximity switches 32 are arranged in particular to determine two starting angular positions for the bending mandrel 3 in the wire feed direction behind the central mandrel and to the side of this feed direction, while two further switches 33 are located on both sides of the wire feed channel as a fuse.
  • the radial position of the mandrel 3 is now changed by aligning the cover plate 29 with the suitable threaded hole 27 in the mounting plate after removing the mandrel 3 and screwing the mandrel back into place.
  • the position determining element 31 is in any case aligned with the new position of the bending mandrel 3, which means that it can be automatically brought back into the correct starting positions by means of the proximity switches 32, so that no readjustment of the device is necessary.
  • FIG. 4 in front of the bending and shearing point 1 there is first a straightening and transport device 34 consisting of several rollers, which is only shown schematically. This device straightens the wire material drawn off a roll and ensures its controlled feed. The straightening and transport device is followed by a length measuring roller arrangement 35. This determines the exact amount of the feed for the control device of the machine. The legs and section lengths of the wire brackets to be produced are determined solely by the size of the feed, as can now be seen from the individual phases of a typical operating sequence shown in FIGS. 5a to 5x for forming an S-shaped bracket. According to FIG.
  • a wire feed (in the direction of the arrow).
  • the amount of feed must exceed the distance between the central mandrel 2 and the bending mandrel 3.
  • the latter is, for example, on the upper of its two starting positions mentioned and is ready for a clockwise bend. 5b at an angle of 90 °.
  • the bending mandrel is turned back by a small angle, so as to release the wire, which exerts a spring-back force on the bending mandrel, so that the latter can retract from an active position without friction (FIG. 5d).
  • the wire is then shifted and the retracted mandrel is returned to its upper starting position.
  • the wire is released (Fig. 5 c, h, n etc.), after which the zoned mandrel returns to one of its two initial angular positions with simultaneous wire feed, depending on which bending direction is to be carried out subsequently . It is essential that these starting positions even after the central mandrel 2 or the shearing device has been replaced 10 and when moving the bending mandrel 3 unchanged, without a readjustment being necessary.
  • step 5 c (and corresponding) is omitted, i.e. Loosen and pull back simultaneously.
  • step 5e can be divided into two individual steps, namely first wire feed and then turning the bending plate.
  • the arrangement described allows the bending machine to be adapted to the wire or rod material to be processed within a very short time. This can significantly increase the machining efficiency.

Abstract

In order to allow an adjusting of the bending tools to a given diameter of the wire being bent allowing the producing of the requisite bending radius a central mandrel which forms two bending or forming, respectively, jaws is replaceable together with a shearing tool. To this end a hollow shaft is mounted at the rear of the central mandrel, which shaft is mounted to a supporting shaft by means of a screw joint. The supporting shaft is supported in turn rotationally and can be rotated by means of a motor in order to disconnect the central mandrel. By mentioned rotation the screw joint is released. A special coupling of the shearing tool to an axially movable operating shaft allows a simultaneous disconnecting of the shearing tool together with the central mandrel. A bending mandrel is mountable at locations having various radial distances from the central mandrel. A cover plate provided with a position control element operates together with proximity switches such that two defined initial angular positions of the bending mandrel is maintained independently from mentioned adjustments.

Description

Die Erfindung betrifft eine Drahtbiegemaschine mit einem die Biegeachsen und den Krümmungsradius bestimmenden Zentraldorn, einer innerhalb des Zentraldorns angeordneten Abschervorrichtung sowie einem ein- und ausfahrbaren Biegedorn, der mittels eines Biegetellers auf einer Kreisbahn um den Zentraldorn bewegbar ist, sowie ein Verfahren zum Betrieb einer solchen.The invention relates to a wire bending machine with a central mandrel determining the bending axes and the radius of curvature, a shearing device arranged within the central mandrel and a retractable and extendable bending mandrel which can be moved on a circular path around the central mandrel by means of a bending plate, and a method for operating such a device.

Eine Drahtbiegemaschine dieser Art ist u.a. aus der CH-A 592 481 bekannt. Die darin beschriebene Maschine weist insbesondere den Nachteil auf, dass der Biegemechanismus nicht an unterschiedliche Draht- bzw. Stangenquerschnitte angepasst werden kann, wie dies etwa beim Biegen von Armierungseisen gemäss SIA-Normen notwendig ist. Die rasche Umstellung der Verarbeitung auf unterschiedliche Stangenquerschnitte ist jedoch ein Erfordernis für den wirtschaftlichen Einsatz derartiger Maschinen. Es stellt sich deshalb die Aufgabe, eine Biegemaschine der eingangs genannten Art zu schaffen, welche eine rasche Anpassung der einzelnen Elemente und des Betriebsablaufs an das jeweils zu verarbeitende Material erlauben. Dies wird erfindungsgemäss dadurch erreicht, dass der Zentraldorn und die Abschervorrichtung zusammen eine auswechselbare. Einheit zur Anpassung an wechselnde Drahdurchmesser bzw. Krümmungsradien bilden.A wire bending machine of this type is known, inter alia, from CH-A 592 481. The machine described therein has the particular disadvantage that the bending mechanism cannot be adapted to different wire or rod cross sections, as is necessary, for example, when bending reinforcing bars in accordance with SIA standards. However, the rapid changeover of processing to different bar cross-sections is a requirement for the economical use of such machines. It is therefore the task of creating a bending machine of the type mentioned at the outset, which allows the individual elements and the operating sequence to be rapidly adapted to the material to be processed. This is achieved according to the invention in that the central mandrel and the shearing device together form an exchangeable one. Form a unit to adapt to changing wire diameters or radii of curvature.

Bei einem bevorzugten Ausführungsbeispiel sind zur Einstellung der radialen Lage des Biegedorns über den Biegeteller in unterschiedlichen Abständen mehrere Oeffnungen zur Aufnahme des Biegedorns verteilt. Eine Deckplatte mit einer radialen Ausnehmung für den Biegedorn weist vorzugsweise ein Lagebestimmungselement auf, welches die Bestimmung der Winkellage des Biegedorns erlaubt. Mit zwei Sensoren, welche auf das Lagebestimmungselement ansprechen, kann in dieser Weise bei jeder radialen Position des Biegedorns auf beiden Seiten der Drahtzufuhrvorrichtung je eine Ausgangswinkellage festgelegt werden. Bei einer solchermassen ausgebildeten Biegemaschine ist ein Verfahren zu deren Betrieb dadurch gekennzeichnet, dass der Biegedorn nach Ausführung einer Biegung in eingezogener Stellung und unter gleichzeitigem Drahtvorschub in einer seiner zwei Ausgangswinkellagen zurückbewegt wird.In a preferred exemplary embodiment, a plurality of openings for receiving the bending mandrel are distributed at different intervals in order to adjust the radial position of the bending mandrel over the bending plate. A cover plate with a radial recess for the bending mandrel preferably has a position-determining element which allows the angular position of the bending mandrel to be determined. With two sensors, which respond to the position determining element, an initial angular position can be determined in this way for each radial position of the bending mandrel on both sides of the wire feed device. In a bending machine designed in this way, a method for its operation is characterized in that the bending mandrel is moved back in one of its two initial angular positions after execution of a bending in the retracted position and with simultaneous wire feed.

Damit lässt sich erreichen, dass der Betriebsablauf unabhängig vom verarbeiteten Stangenquerschnitt jeweils automatisch von den richtigen Ausgangslagen erfolgt. Die Anpassung der Maschinenelemente an das zu verarbeitende Material verlangt damit keine Neujustierung.This means that the operating sequence is automatically carried out from the correct starting positions regardless of the processed bar cross-section. The adaptation of the machine elements to the material to be processed does not require any readjustment.

Nachfolgend wird nun ein Ausführungsbeispiel der Erfindung anhand der beiliegenden Zeichnung detailliert erläutert. Es zeigen:

  • Fig. 1 einen Schnitt, teilweise schematisch dargestellt, im wesentlichen entlang einer Ebene gebildet durch Drahzufuhrrichtung und Drehachse des Biegetellers;
  • Fig. 2 eine Ansicht, teilweise geschnitten, auf die Linie II-II in Fig. l;
  • Fig. 3 einen Schnitt, teilweise schamtisch dargestellt, auf die Linie III-III in Fig. 1;
  • Fig. 4 eine schematische Ansicht auf den Biegeteller mit Richt- und Messanordnung, und
  • Fig. 5 a bis x die einzelnen Phasen einer beispielhaft dargestellten Biegefolge.
An embodiment of the invention will now be explained in detail with reference to the accompanying drawing. Show it:
  • Figure 1 is a section, partially shown schematically, substantially along a plane formed by the wire feed direction and axis of rotation of the bending plate.
  • Fig. 2 is a view, partly in section, on the line II-II in Fig. 1;
  • FIG. 3 shows a section, partly shown in shameless fashion, on the line III-III in FIG. 1;
  • Fig. 4 is a schematic view of the bending plate with straightening and measuring arrangement, and
  • 5 a to x the individual phases of an exemplary illustrated bending sequence.

Fig. 1 zeigt in Verbindung mit Fig. 2 den grundsätzlichen Aufbau der Drahtbiegemaschine. Durch einen feststehenden, mit dem Maschinengehäuse verbundenen Drahtzufuhrkanal 5 gelangt der gerichtete Draht zur Biege-und Abscherstelle 1. Diese weist einen Zentraldorn 2 auf, der beidseitig der Drahtzufuhrrichtung je eine Formgebungsbacke bildet, welche den Krümmungsradius für jede Biegung bestimmen. Ein Biegedorn 3 ist mittels eines angetriebenen Biegetellers 4 bezüglich der Drahtzufuhrrichtung um je 1800 im Uhrzeiger- sowie im Gegenuhrzeigersinn drehbar. Der Biegedorn 3 durchdringt den Biegeteller 4 und ist in einer dahinterliegenden Befestigungsscheibe 6 eingeschraubt. Diese ist in Führungsgliedern 7 (Fig. 3) bezüglich des Biegetellers 4 axial verschiebbar, wie in Fig. 1 strichliert dargestellt ist, wodurch der Biegedorn 3 aus seiner Arbeitsstellung zurückziehbar ist. Die axiale Verschiebung der Befestigungsscheibe 6 erfolgt über ein nicht dargestelltes öl-hydraulisch getriebenes Hebelsystem. Das für die Biegung nötige Drehmoment wird vom Biegeteller 4 auf den Biegedorn 3 ausgeübt. Der Biegeteller 4 weist dazu einen hohlzylindrischen rückwärtigen Ansatz auf, auf welchem zwischen Lagern 8 ein Antriebszahnrad 9 sitzt, das über eine kinematische Kette, die im einzelnen nicht gezeigt ist, angetrieben wird. Auf diese Weise kann der Biegedorn unabhängig voneinander eine Kreisbewegung sowie eine Ein- bzw. Ausfahrbewegung vornehmen. Dies wird weiter hinten im Zusammenhang mit Fig. 5 noch im Detail erläutert.Fig. 1 shows in connection with Fig. 2 the basic structure of the wire bending machine. The directional wire reaches the bending and shearing point 1 through a fixed wire feed channel 5 connected to the machine housing. A bending mandrel 3 is the wire feeding direction by means of a rotatably driven bending plate 4 with respect to each 180 0 in the clockwise and counterclockwise. The bending mandrel 3 penetrates the bending plate 4 and is screwed into a fastening disk 6 located behind it. This is axially displaceable in guide members 7 (FIG. 3) with respect to the bending plate 4, as shown in broken lines in FIG. 1, as a result of which the bending mandrel 3 can be withdrawn from its working position. The axial displacement of the mounting disc 6 takes place via an oil-hydraulic lever system, not shown. The torque required for the bending is exerted by the bending plate 4 on the bending mandrel 3. For this purpose, the bending plate 4 has a hollow cylindrical rear attachment, on which a drive gear 9 is seated between bearings 8 and is driven by a kinematic chain, which is not shown in detail. In this way, the mandrel can independently perform a circular movement and an inward or outward movement. This will be explained in more detail later in connection with FIG. 5.

Innerhalb des Zentraldorns 2 ist eine Abscher-und Auswurfvorrichtung 10 angeordnet, welche ein in Achsrichtung mit bestimmtem Hub bewegbares Scherwerkzeug 12 aufweist, das über eine Betätigungsstange 13 durch einen hydraulischen Zylinder 11 (Fig. 1) angetrieben wird. Das Scherwerkzeug 12, welches eine verstärkte ebene Scherfläche aufweist, wirkt mit einer Hülse 14 im Zentraldorn 2 zusammen, welche einerseits als Drahtführung und andererseits als Gegenmesser ausgebildet ist. Wie sich im Zusammenhang mit Fig. 5 ergeben wird, weist die zentrale Anordnung der Abschervorrichtung 10 den Vorteil auf, dass zur Ausbildung des Endabschnittes eines fertig gebogenen Drahbügels kein Rückzug des Drahtes bei kurzen Endabschnitten nötig ist, wie dies bei bekannten Biegemaschinen der Fall ist, welche eine vor der Biegestelle angeordnete Abscher-vorrichtung aufweisen. Andererseits stand bisher eine zentrale Anordnung der Abschervorrichtung einer Anpassung der Biegemaschine an die jeweiligen Bedürfnisse entgegen.Arranged within the central mandrel 2 is a shearing and ejection device 10, which has an axis Direction with a certain stroke movable shear tool 12 which is driven via an actuating rod 13 by a hydraulic cylinder 11 (Fig. 1). The shear tool 12, which has a reinforced flat shear surface, interacts with a sleeve 14 in the central mandrel 2, which is designed on the one hand as a wire guide and on the other hand as a counter knife. As will be seen in connection with FIG. 5, the central arrangement of the shearing device 10 has the advantage that for the formation of the end section of a fully bent wire bracket, no retraction of the wire is necessary in the case of short end sections, as is the case with known bending machines, which have a shearing device arranged in front of the bending point. On the other hand, a central arrangement of the shearing device hitherto prevented the bending machine from being adapted to the respective needs.

Die Biegeradien, welche vor allem durch die Form der genannten Formgebungsbacken des Zentraldorns 2 bestimmt sind, sollen nämlich in Abhängigkeit des Draht- bzw. Stangendurchmessers eingestellt werden können (siehe dazu die entsprechenden SIA-Normen). Die genannte Anpassung der Biegemaschine setzt deshalb unter anderem eine leichte Auswechselbarkeit des Zentraldorns 2 voraus, innerhalb dessen, wie erläutert, die Abschervorrichtung 10 angeordnet ist. Hierzu ist der Zentraldorn rückseitig mit einer Hohlwelle 15 versehen, wie den Fig. 2 und 3 zu entnehmen ist. Die Hohlwelle 15 weist am hinteren Ende ein Gewinde 16 auf, in welches ein entsprechendes Gegengewinde eines Halterohrs 17 eingreift. Das Halterohr 17, welches drehbar in Lagern 18 gehalten ist, weist ein Schneckenrad 19 auf, das über eine Schnecke 20 durch den Motor 21 antreibbar ist (Fig. l). Bei einer anderen Ausführungsart ist eine Handkurbel vorgesehen, mittels welcher die Schnecke 20 von Hand gedreht werden kann. Soll der Zentraldorn ausgewechselt werden, so wird der Motor 21 in Betrieb gesetzt bzw. an der Handkurbel gedreht, wodurch das Halterohr 17 in Drehung versetzt wird. Da der Zentraldorn und damit die Hohlwelle 15 durch den Drahtzufuhrkanal 5 gegen Drehung gesichert, jedoch axial verschiebbar ist, löst sich die Schraubverbindung zwischen Halterohr 17 und Hohlwelle 15 und der Zentraldorn 2 verschiebt sich nach aussen. Das Scherwerkzeug 12 ist nun derart mit seiner Betätigungsstange 13 verbunden (Fig. 3), dass es sich dabei ebenfalls löst und zusammen mit dem Zentraldorn von der Vorderseite her entfernbar ist. Dazu wird das Scherwerkzeug 12 mittels einer Feder 22 nach hinten belastet. Seine Verbindung mit der Betätigungsstange 13 wird durch radial verschiebbare Bolzen 23 sichergestellt, welche beim Vorschieben der Hohlwelle 15 durch die Federkraft in darin angeordnete radiale Ausnehmungen 24 gedrückt werden und damit die Verbindung freigeben. Ein Sicherungsring 25 gewährleistet, dass das Schwerwerkzeug 12 nach vollständigem Lösen der Schraubverbindung zusammen mit dem Zentraldorn 2 herausgezogen werden kann. Das Einsetzen eines anderen Zentraldorns 2 zusammen mit. einem Scherwerkzeug 12 geschieht auf entsprechende Weise, wobei der Motor 21 mit umgekehrter Drehrichtung betrieben wird.The bending radii, which are primarily determined by the shape of the shaping jaws of the central mandrel 2, should be able to be adjusted depending on the wire or rod diameter (see the corresponding SIA standards). The aforementioned adaptation of the bending machine therefore requires, among other things, easy interchangeability of the central mandrel 2, within which, as explained, the shearing device 10 is arranged. For this purpose, the central mandrel is provided on the back with a hollow shaft 15, as can be seen in FIGS. 2 and 3. The hollow shaft 15 has a thread 16 at the rear end, in which a corresponding mating thread of a holding tube 17 engages. The holding tube 17, which is rotatably held in bearings 18, has a worm wheel 19 which can be driven by the motor 21 via a worm 20 (FIG. 1). Another one A hand crank is provided, by means of which the worm 20 can be rotated by hand. If the central mandrel is to be replaced, the motor 21 is started up or rotated on the hand crank, as a result of which the holding tube 17 is set in rotation. Since the central mandrel and thus the hollow shaft 15 is secured against rotation by the wire feed channel 5, but is axially displaceable, the screw connection between the holding tube 17 and the hollow shaft 15 is loosened and the central mandrel 2 moves outward. The shear tool 12 is now connected to its actuating rod 13 (FIG. 3) in such a way that it also loosens and can be removed from the front together with the central mandrel. For this purpose, the shear tool 12 is loaded to the rear by means of a spring 22. Its connection to the actuating rod 13 is ensured by radially displaceable bolts 23 which, when the hollow shaft 15 is advanced, are pressed into radial recesses 24 arranged therein by the spring force and thus release the connection. A locking ring 25 ensures that the heavy tool 12 can be pulled out together with the central mandrel 2 after the screw connection has been completely loosened. The insertion of another central mandrel 2 together with. a shearing tool 12 is done in a corresponding manner, the motor 21 being operated in the opposite direction of rotation.

Zentraldorn 2 und Scherwerkzeug 12 bilden auch insofern eine Einheit, als sie zusammen die Formgebungsbacken bilden, wie insbesondere aus Fig. 2 ersichtlich ist. Das Scherwerkzeug 12 weist am Scherkopf Führungsvorsprünge 26 auf, die Teil der Formgebungsbacken bilden und an deren Krümmungsradius angepasst sind.Central mandrel 2 and shear tool 12 also form a unit insofar as they together form the shaping jaws, as can be seen in particular from FIG. 2. The shaving tool 12 has guide projections 26 on the shaving head, which form part of the shaping jaws and are adapted to the radius of curvature thereof.

An diesen Krümmungsradius bzw. an den Stangendurchmesser, muss auch die radiale Lage des Biegedorns 3 angepasst werden. Je grösser der Biegeradius gewählt wird, desto weiter aussen ist der Biegedorn anzuordnen. Es ist nun von Bedeutung, dass auch die Lage des Biegedorns 3 rasch an die jeweiligen Verhältnisse angepasst werden kann. Hierzu sind in der Befestigungsscheibe 6 mehrere, auf unterschiedlichen Radien (vgl. Fig. 2) angeordnete Gewindelöcher 27 und entsprechende Durchtritte 28 im Biegeteller.:4 vorgesehen (Fig. 3). Diese sind bis auf eines von einer Deckplatte 29 verdeckt. Die Deckplatte weist einen radial verlaufenden Schlitz 30 auf, in welchem der Biegedorn 3 in allen seinen radialen Lagen aufgenommen werden kann. Die Deckplatte 29 ist im übrigen bezüglich des Biegetellers 4 frei verdrehbar. Im Bereich des radialen Schlitzes 30 weist sie als Lagebestimmungselement 31 eine Metallplatte zur Beeinflussung von Näherungsschaltern 32, 33 auf. Zwei solcher Nähgerungsschalter 32 sind insbesondere zur Festlegung zweier Ausgangswinkellagen für den Biegedorn 3 in der Drahtzufuhrrichtung hinter dem Zentraldorn und je seitlich dieser Zufuhrrichtung angeordnet, während sich zwei weitere Schalter 33 als Sicherung beidseitig dem Drahtzufuhrkanal befinden. Die Aenderung der radialen Lage des Biegedorns 3 erfolgt nun dadurch, dass nach Entfernung des: Biegedorns 3 die Deckplatte 29 auf das geeignete Gewindeloch 27 in der Befesitungsplattte ausgerichtet und der Biegedorn an der entsprechenden Stelle wieder eingeschraubt wird. Dabei wird jedoch das Lagebestimmungselement 31 in jedem Fall auf die neue Lage des Biegedorns 3 ausgerichtet, womit dieser mittels der Näherungsschalter 32 automatisch wieder in die richtigen Ausgangspositionen bringbar ist, so dass keine Neujustierung der Einrichtung nötig ist.At this radius of curvature or on the rods diameter, has also the radial position of the B iegedorns be adjusted. 3 The larger the bending radius is selected, the further outside the mandrel has to be arranged. It is now important that the position of the bending mandrel 3 can also be quickly adapted to the respective conditions. For this purpose, a plurality of threaded holes 27 arranged on different radii (cf. FIG. 2) and corresponding passages 28 in the bending plate: 4 are provided in the fastening disk 6 (FIG. 3). Except for one, these are covered by a cover plate 29. The cover plate has a radially extending slot 30, in which the bending mandrel 3 can be received in all of its radial positions. The cover plate 29 is otherwise freely rotatable with respect to the bending plate 4. In the area of the radial slot 30, it has a metal plate as position determining element 31 for influencing proximity switches 32, 33. Two such proximity switches 32 are arranged in particular to determine two starting angular positions for the bending mandrel 3 in the wire feed direction behind the central mandrel and to the side of this feed direction, while two further switches 33 are located on both sides of the wire feed channel as a fuse. The radial position of the mandrel 3 is now changed by aligning the cover plate 29 with the suitable threaded hole 27 in the mounting plate after removing the mandrel 3 and screwing the mandrel back into place. In this case, however, the position determining element 31 is in any case aligned with the new position of the bending mandrel 3, which means that it can be automatically brought back into the correct starting positions by means of the proximity switches 32, so that no readjustment of the device is necessary.

Der Betrieb der erläuterten Vorrichtung wird nun anhand der Fig. 4 und 5 näher erläutert. Wie aus Fig. 4 ersichtlich ist, befindet sich vor der Biege- und Abscherstelle 1 zunächst eine aus mehreren Rollen bestehende Richt- und Transportvorrichtung 34, welche nur schematisch gezeigt ist. Diese Vorrichtung richtet das von einer Rolle abgezogene Drahtmaterial gerade und besorgt dessen gesteuerten Vorschub. Die Richt- und Transportvorrichtung wird von einer Längenmessrollenanordnung 35 gefolgt. Diese bestimmt den exakten Betrag des Vorschubs für die Steuereinrichtung der Maschine. Die Schenkel und Abschnittlängen der herzustellenden Drahbügel werden allein durch das Mass des Vorschubs bestimmt, wie sich nun aus den einzelnen in Fig. 5a bis 5x dargestellten Phasen eines typischen Betriebsablaufs zur Bildung eines S-förmigen Bügels ergibt. Gemäss Fig. 5a erfolgt zunächst ein Drahtvorschub (in Pfeilrichtung). Das Mass des Vorschubs muss den Abstand zwischen dem Zentraldorn 2 und dem Biegedorn 3 übersteigen. Letzterer befindet sich beispielsweise auf der oberen seiner beiden erwähnten Ausgangslagen und ist für eine Biegung im Uhrzeigersinn bereit. Diese erfolgt gemäss Fig. 5b in einem Winkel um 90°. Danach (Fig. 5c) wird der Biegedorn um einen kleinen Winkel zurückgedreht, um so den Draht freizugeben, der eine Rückfederkraft auf den Biegedorn ausübt, so dass sich dieser reibungsfrei aus einer aktiven Lage zurückziehen kann (Fig. 5d). Danach erfolgt gemäss Fig. 5e zugleich der Drahtverschub und die Rückführung des eingezogenen Biegedorns in seine obere Ausgangslage. Mit dieser simultanen Vorschub- und Rückführungsbewegung, welche nur bei eingezogenem Biegedorn erfolgen soll, ist es möglich, die Bearbeitungszeit etwas zu reduzieren. In seiner oberen Ausgangslage wird der Biegedorn 3 wieder in seine aktive Lage eingerückt (Fig. 5f) und ist damit zur nächsten Biegung (Fig. 5g) im Uhrzeigersinn bereit. Nach Ausführung dieser Biegung erfolgt wiederum die Freigabe des Drahtes (Fig. 5h) und das Zurückziehen des Biegedorns (Fig. 5i). Da nun eine Biegung in der entgegengesetzten Richtung erfolgen soll, wird der Biegedorn während des nächsten Drahtvorschubs auf seine untere Ausgangslage zurückgedreht (Fig. 5k), wonach seine Einrückung in die aktive Lage mit anschliessender Biegung des Drahtes um 900 im Gegenuhrzeigersinn erfolgt, wie in den Fig.5 1 und 5 m gezeigt. Nach diesem Biegevorgang wiederholt sich die Sequenz: Freigabe des Drahtes, Zurückziehen und Rückstellung in eine (die untere ) der Ausgangslagen bei gleichzeitigem Drahtvorschub (Fig. 5 n'bis p). Die folgenden Schritte zur Vornahme einer weiteren Biegung im Gegenuhrzeigersinn laufen ebenfalls in der bereits erläuterten Weise ab, nämlich: Einrücken des Biegedorns, Biegung um 90°, Freigabe des Drahtes (Fig. 5 q bis s)). Danach erfolgt ein weiteres Einrücken des Biegedorns (Fig. 5 t) zum nachfolgenden Drahtvorschub unter Rückführung des Biegedorns in seine (obere) Ausgangslage (Fig. 5 u).The operation of the device explained will now be explained in more detail with reference to FIGS. 4 and 5. As can be seen from FIG. 4, in front of the bending and shearing point 1 there is first a straightening and transport device 34 consisting of several rollers, which is only shown schematically. This device straightens the wire material drawn off a roll and ensures its controlled feed. The straightening and transport device is followed by a length measuring roller arrangement 35. This determines the exact amount of the feed for the control device of the machine. The legs and section lengths of the wire brackets to be produced are determined solely by the size of the feed, as can now be seen from the individual phases of a typical operating sequence shown in FIGS. 5a to 5x for forming an S-shaped bracket. According to FIG. 5a, there is first a wire feed (in the direction of the arrow). The amount of feed must exceed the distance between the central mandrel 2 and the bending mandrel 3. The latter is, for example, on the upper of its two starting positions mentioned and is ready for a clockwise bend. 5b at an angle of 90 °. Thereafter (FIG. 5c), the bending mandrel is turned back by a small angle, so as to release the wire, which exerts a spring-back force on the bending mandrel, so that the latter can retract from an active position without friction (FIG. 5d). 5e, the wire is then shifted and the retracted mandrel is returned to its upper starting position. With this simultaneous feed and return movement, which should only take place when the mandrel is retracted, it is possible to reduce the machining time somewhat. In its upper starting position, the bending mandrel 3 is pushed back into its active position (FIG. 5f) and is thus at the next bend (FIG. 5g) in the clock ready to go. After this bend has been carried out, the wire is again released (FIG. 5h) and the mandrel is withdrawn (FIG. 5i). As should now be made a bend in the opposite direction of the bending mandrel is during the next wire feed on its lower initial position rotated (Fig. 5k), which takes place his engagement in the active position with subsequent bending of the wire by 90 0 in the counterclockwise direction, as shown in 5 1 and 5 m shown. After this bending process the sequence is repeated: releasing the wire, pulling it back and returning it to one (the lower) of the starting positions with simultaneous wire feed (Fig. 5 n'bis p). The following steps for making a further counterclockwise bend also proceed in the manner already explained, namely: engagement of the bending mandrel, bend through 90 °, release of the wire (FIG. 5 q to s)). This is followed by a further engagement of the bending mandrel (Fig. 5 t) for the subsequent wire feed while returning the bending mandrel to its (upper) starting position (Fig. 5 u).

Anschliessend erfolgt nach Abschluss des gewünschten Vorschubs, welcher, wie erwähnt, von dem Längenmessrollen 35 gesteuert wird, die Betätigung der Abscher-und Auswurfvorrichtung 10 (Fig. 5 v). Mit dem Einziehen des Scherkopfes (Fig. 5w) und dem Einrücken des Biegedorns (Fig. 5 x) wird die Sequenz beendet.Then, after completion of the desired feed, which, as mentioned, is controlled by the length measuring rollers 35, the shearing and ejection device 10 is actuated (FIG. 5 v). The sequence ends with the retraction of the shaving head (Fig. 5w) and the insertion of the bending mandrel (Fig. 5 x).

Wie sich aus dieser Beschreibung ergibt, erfolgt vorzugsweise nach jedem Biegevorgang zunächst die Drahtfreigabe (Fig. 5 c, h,n etc.), wonach der eingezone Biegedorn unter gleichzeitigem Drahtvorschub in eine seiner beiden Ausgangswinkellagen zurückkehrt, je nachdem, welche Biegerichtung nachfolgend auszuführen ist. Wesentlich ist dabei, dass diese Ausgangslagen auch nach dem Auswechseln des Zentraldorns 2 bzw. der Abschervorrichtung 10 sowie beim Versetzen des Biegedorns 3 unverändert beibehalten werden, ohne dass eine Neujustierung notwendig ist.As can be seen from this description, preferably after each bending process the wire is released (Fig. 5 c, h, n etc.), after which the zoned mandrel returns to one of its two initial angular positions with simultaneous wire feed, depending on which bending direction is to be carried out subsequently . It is essential that these starting positions even after the central mandrel 2 or the shearing device has been replaced 10 and when moving the bending mandrel 3 unchanged, without a readjustment being necessary.

Die Sequenz kann dabei jedoch in der Weise vereinfacht werden, dass der Schritt 5 c (und entsprechende) wegfällt, d.h. Lösen und Zurückziehen simultan erfolgen. Ebenso kann der Schritt 5 e auf zwei Einzelschritte, nämlich zuerst Drahtvorschub und danach Drehen des Biegetellers, aufgeteilt werden.However, the sequence can be simplified in such a way that step 5 c (and corresponding) is omitted, i.e. Loosen and pull back simultaneously. Likewise, step 5e can be divided into two individual steps, namely first wire feed and then turning the bending plate.

Die beschriebene Anordnung erlaubt es, die Biegemaschine innert kürzester Zeit an das zu verarbeitende Draht- bzw. Stangenmaterial anzupassen. Damit kann die Bearbeitungseffizienz wesentlich erhöht werden.The arrangement described allows the bending machine to be adapted to the wire or rod material to be processed within a very short time. This can significantly increase the machining efficiency.

Claims (12)

1. Drahtbiegemaschine mit einem die Biegeachsen und den Krümmungsradius bestimmenden Zentraldorn (2), einer innerhalb des Zentraldorns angeordneten Abschervorrichtung (10) sowie einem ein- und ausfahrbaren Biegedorn (3), der mittels eines Biegetellers (4) auf einer Kreisbahn um den Zentraldorn bewegbar ist, dadurch gekennzeichnet, dass der Zentraldorn (2) und die Abscher- vorrichtung zusammen eine auswechselbare Einheit zur Anpassung an wechselnde Drahtdurchmesser bzw. Krümmungsradien bilden.1. Wire bending machine with a central mandrel (2) determining the bending axes and the radius of curvature, a shearing device (10) arranged inside the central mandrel and a retractable and extending mandrel (3) which can be moved on a circular path around the central mandrel by means of a bending plate (4) is characterized in that the central mandrel (2) and the shearing device together form an exchangeable unit for adaptation to changing wire diameters or radii of curvature. 2. Drahtbiegemaschine nach Anspruch 1, wobei die radiale Lage des Biegedorns (3) auf dem Biegeteller (4) einstellbar ist, dadurch gekennzeichnet, dass über den Biegeteller (4) verteilt in unterschiedlichen radialen Abständen mehrere Oeffnungen (28) zur Aufnahme des Biegedorns und in einer axial dazu verschiebbaren Befestigungsscheibe (6) entsprechende Befestigungsstellen (27) für den Biegedorn vorgesehen sind.2. A wire bending machine according to claim 1, wherein the radial position of the bending mandrel (3) on the bending plate (4) is adjustable, characterized in that several openings (28) for receiving the bending mandrel and are distributed over the bending plate (4) at different radial distances Corresponding fastening points (27) for the bending mandrel are provided in an axially displaceable fastening disk (6). 3. Drahtbiegemaschine nach Anspruch 2, dadurch gekennzeichnet, dass auf dem Biegeteller (4) eine Deckplatte (29) mit einer radialen Ausnehmung (30) für den Biegedorn (3) angeordnet ist, wobei die Deckplatte ein Lagebestimmungselement (31) aufweist, auf welches mindestens ein feststehender Sensor (32) zur Bestimmung der Winkellage des Biegedorns (3) ansprechbar ist.3. Wire bending machine according to claim 2, characterized in that a cover plate (29) with a radial recess (30) for the bending mandrel (3) is arranged on the bending plate (4), the cover plate having a position determining element (31) on which at least one fixed sensor (32) can be addressed for determining the angular position of the bending mandrel (3). 4. Drahtbiegemaschine nach Anspruch 2, dadurch gekennzeichnet, dass mindestens zwei ortsfeste Sensoren (32) zur Festlegung je einer Ausgangswinkellage des Biegedorns (3) vorgesehen sind, welche sich in Drahtzufuhrrichtung hinter dem Zentraldorn (2) je seitlich der Zufuhrrichtung befinden.4. Wire bending machine according to claim 2, characterized in that at least two fixed sensors (32) are provided for determining an initial angular position of the bending mandrel (3), which are in The wire feed direction is behind the central mandrel (2) to the side of the feed direction. 5. Drahtbiegemaschine nach Anspruch 1, dadurch gekennzeichnet, dass der Zentraldorn (2) rückseitig eine Hohlwelle (15) aufweist, die mittels eines Schraubgewindes (16) auf einem drehbar gelagerten, koaxialen Halterohr (17) befestigt ist, wobei das Halterohr zum Lösen und Befestigen des Zentraldorns um seine Achse rotierbar ist, derart, dass der Zentraldorn von der Vorderseite her austauschbar ist.5. Wire bending machine according to claim 1, characterized in that the central mandrel (2) on the rear side has a hollow shaft (15) which is fastened by means of a screw thread (16) on a rotatably mounted, coaxial holding tube (17), the holding tube for releasing and Fastening the central mandrel is rotatable about its axis, such that the central mandrel can be replaced from the front. 6. Drahtbiegemaschine nach Anspruch 5, dadurch gekennzeichnet, dass der Zentraldorn (2) von einem feststehenden Drahtzufuhrkanal (5) drehfest, jedoch axial verschiebbar, gehalten ist.6. Wire bending machine according to claim 5, characterized in that the central mandrel (2) is held in a rotationally fixed but axially displaceable manner by a fixed wire feed channel (5). 7. Drahtbiegemaschine nach Anspruch 5, dadurch gekennzeichnet, dass die Abschervorrichtung (10) ein innerhalb der Hohlwelle (15) verlaufendes, axial bewegbares Scherwerkzeug (12) aufweist, dessen mit dem Zentraldorn zusammenwirkender Scherkopf derart mit einer Betätigungsstange (13) verbunden ist, dass er sich beim Lösen des Zentraldorns (2) selbsttätig von dieser löst.7. Wire bending machine according to claim 5, characterized in that the shearing device (10) has an axially movable shearing tool (12) running within the hollow shaft (15), the shaving head cooperating with the central mandrel being connected to an actuating rod (13) in such a way that it automatically detaches from the central mandrel (2) when it is released. 8. Drahtbiegemaschine nach Anspruch 7, dadurch gekennzeichnet, dass der Scherkopf als ebenes Schermesser mit seitlichen Führungsvorsprüngen (26) ausgebildet ist und mit einer als Gegenmesser ausgestalteten Hülse (14) im Zentraldorn (2) zusammenwirkt,.wobei die Führungsvorsprünge (26) zusammen mit dem Zentraldorn zwei Formgebungsbacken bilden, von denen jeder eine Biegeachse für je eine Biegerichtung festlegt.8. Wire bending machine according to claim 7, characterized in that the shaving head is designed as a flat shaving knife with lateral guide projections (26) and cooperates with a sleeve designed as a counter knife (14) in the central mandrel (2), the guide projections (26) together with form the central mandrel two shaping jaws, each of which defines a bending axis for each bending direction. 9. Verfahren zum Betrieb der Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, dass der Biegedorn (3) nach Ausführung einer Biegung in eingezogener Stellung und unter gleichzeitigem Drahtverschub in eine seiner zwei Ausgangswinkellagen zurückbewegt wird.9. The method for operating the device according to claim 4, characterized in that the bending mandrel (3) after execution of a bend in the retracted position and with simultaneous wire displacement in one of its two Starting angle positions is moved back. 10. Verfahren nach Anspruch 9, dadurch gekennzeichnet, dass die Bemessung der Schenkellängen des zu bildenden Drahtbügels und insbesondere die Bildung des Endabschnittes ausschliesslich durch entsprechenden Drahtverschub erfolgt.10. The method according to claim 9, characterized in that the dimensioning of the leg lengths of the wire bracket to be formed and in particular the formation of the end section is carried out exclusively by appropriate wire displacement. 11. Verfahren nach einem der Ansprüche 9 und 10, dadurch gekennzeichnet, dass der Biegedorn zur Bereitstellung für den jeweils folgenden Biegevorgang während des Drahtverschubs auf diejenige Ausgangswinkellage geführt wird, welche als Ausgangslage für den nächsten Biegevorgang geeignet ist.11. The method according to any one of claims 9 and 10, characterized in that the bending mandrel is provided to provide for the following bending process during the wire shift to the starting angular position which is suitable as the starting position for the next bending process. 12. Verfahren nach einem der Ansprüche 9 bis 11, dadurch gekennzeichnet, dass der Biegedorn nach Ausführung einer Biegung und vor dem Einziehen jeweils um einen derart bemessenen Winkel zurückgedreht wird, dass er sich vom gebogenen Drahtstück löst.12. The method according to any one of claims 9 to 11, characterized in that the bending mandrel is rotated back after executing a bend and before drawing in by such a dimension that it detaches from the bent piece of wire.
EP19820110412 1981-11-18 1982-11-11 Wire-bending machine Expired EP0079587B1 (en)

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AT82110412T ATE18724T1 (en) 1981-11-18 1982-11-11 WIRE BENDING MACHINE.

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CH7413/81 1981-11-18
CH7413/81A CH652947A5 (en) 1981-11-18 1981-11-18 WIRE BENDING MACHINE.

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EP0079587A1 true EP0079587A1 (en) 1983-05-25
EP0079587B1 EP0079587B1 (en) 1986-03-26

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JP (1) JPS58176037A (en)
AT (1) ATE18724T1 (en)
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CH (1) CH652947A5 (en)
DE (1) DE3270158D1 (en)
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JPH03248732A (en) * 1990-04-09 1991-11-06 Micro Giken:Kk Bending machine for wire
FR2749199A1 (en) * 1996-06-03 1997-12-05 Faure Bertrand Equipements Sa Machine for bending metal wires in a predetermined configuration
ITBO20000602A1 (en) * 2000-10-16 2002-04-16 Schnell Spa METHOD AND EQUIPMENT FOR BENDING PROFILES AND SIMILAR ACCORDING TO PROGRAMMABLE BENDING RAYS
GR1004238B (en) * 2002-04-02 2003-05-14 Αντωνης Παναγιωτη Αναγνωστοπουλος Method and machine for bending concrete beams, wires, tubes or other material of a prismatic cross section
ITUD20040032A1 (en) * 2004-02-25 2004-05-25 Omes Ohg Srl BAR FOLDING DEVICE
JP5233901B2 (en) * 2009-08-07 2013-07-10 アイシン・エィ・ダブリュ株式会社 Bending method
JP5576651B2 (en) * 2009-12-25 2014-08-20 川崎重工業株式会社 Mandrel assembling method and mandrel assembling apparatus for manufacturing composite material structure
JP5670957B2 (en) * 2012-05-21 2015-02-18 株式会社多賀製作所 Square wire bending machine
ITUD20130131A1 (en) * 2013-10-14 2015-04-15 A C M Srl Automatismi Costruzioni Meccaniche APPARATUS FOR BENDING OBLUNG METAL PRODUCTS, SUCH AS BARS, ROUNDS OR METAL WIRES, AND RELATIVE BENDING PROCEDURE
US11167337B2 (en) * 2018-11-01 2021-11-09 Pensa Labs, Inc. Self cutting wire bender
CN112845951A (en) * 2019-11-12 2021-05-28 国网山东省电力公司滨州供电公司 Portable radian-adjustable steel wire bending tool and method
CN111790839A (en) * 2020-06-24 2020-10-20 姜玲华 Steel bar bending machine

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CH592481A5 (en) * 1973-12-03 1977-10-31 Campagna Giuseppe Fixture for bending concrete reinforcement bars - has anvil and bending mandrel and crops bar after last bend
EP0015354A1 (en) * 1979-02-28 1980-09-17 M.E.P. Macchine Elettroniche Piegatrici S.p.A. Stirrup machine

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DE1552885A1 (en) * 1966-09-15 1969-09-11 Frederiksen Ove Steen Machine for bending tubes or bars
CH592481A5 (en) * 1973-12-03 1977-10-31 Campagna Giuseppe Fixture for bending concrete reinforcement bars - has anvil and bending mandrel and crops bar after last bend
DE2613264A1 (en) * 1974-05-07 1976-10-28 Remigio Del Fabro BENDING DEVICE WITH A RECESSING PROFILED CENTRAL BENDING PIECE FOR AUTOMATIC BENDING MACHINES FOR WIRES AND BARS MADE OF METAL
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Cited By (19)

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Publication number Priority date Publication date Assignee Title
EP0258109A1 (en) * 1986-08-04 1988-03-02 LATOUR & FILS Method and apparatus for bending metallic wires
FR2602159A1 (en) * 1986-08-04 1988-02-05 Latour Fils METHOD AND MACHINE FOR BENDING METAL WIRES
US5182932A (en) * 1989-09-20 1993-02-02 Evg Entwicklungs-U Verwertungs-Gesellschaft M.B.H. Apparatus for bending steel bars to form concrete reinforcement elements
EP0419441A1 (en) * 1989-09-20 1991-03-27 EVG Entwicklungs- u. Verwertungs- Gesellschaft m.b.H. Apparatus for bending concrete reinforcing bars
WO1991004113A1 (en) * 1989-09-20 1991-04-04 Evg Entwicklungs- U. Verwertungs-Gesellschaft M.B.H. Device for bending steel rods into concrete reinforcing irons
US5349838A (en) * 1991-06-06 1994-09-27 Latour & Fils S.A. Bending head with multiple tools for a machine for bending metal wires
FR2677282A1 (en) * 1991-06-06 1992-12-11 Latour Yves MULTIPLE TOOL BENDING HEAD FOR METAL WIRE BENDING MACHINE.
WO1992021455A1 (en) * 1991-06-06 1992-12-10 Latour & Fils S.A. Multiple-tool bending head for wire bending machine
EP0517637A1 (en) * 1991-06-06 1992-12-09 LATOUR & FILS Multiple tool bending head for a wire bending machine
FR2715334A1 (en) * 1994-01-21 1995-07-28 Automatisation Ste Francaise Metal rod bending machine
NL9401473A (en) * 1994-09-09 1996-04-01 Holland Mechanics Bv Bending device
EP0850707A1 (en) * 1996-10-01 1998-07-01 M.E.P. Macchine Elettroniche Piegatrici S.p.A. Bending method for a double shaping machine and the relative double shaping machine with movable winged elements
DE102011015570A1 (en) * 2011-03-30 2012-10-04 Wafios Ag Bending head for bending rod and tubular workpieces
DE102011015570B4 (en) * 2011-03-30 2015-01-22 Wafios Ag Bending head for bending rod and tubular workpieces
US9468963B2 (en) 2011-03-30 2016-10-18 Wafios Aktiengesellschaft Bending head for bending rod- and pipe-shaped workpieces
WO2015154117A1 (en) * 2014-04-09 2015-10-15 Stonawski, Rudolf Device and method for bending a profiled element
CN105903855A (en) * 2016-06-20 2016-08-31 德州恒远焊材有限公司 Steel wire bending method and steel wire bending equipment for realizing method
US20190321877A1 (en) * 2017-01-30 2019-10-24 Geobrugg Ag Bending device for producing a coil for a wire mesh
EP4292729A1 (en) * 2022-06-15 2023-12-20 Progress Maschinen & Automation AG Method for automatically changing at least one bending die and / or at least one guide nozzle of a bending machine

Also Published As

Publication number Publication date
GR77778B (en) 1984-09-25
DE3270158D1 (en) 1986-04-30
ES517405A0 (en) 1983-11-16
JPS58176037A (en) 1983-10-15
YU256882A (en) 1986-12-31
YU45873B (en) 1992-09-07
CH652947A5 (en) 1985-12-13
MX159337A (en) 1989-05-17
ES8400683A1 (en) 1983-11-16
ATE18724T1 (en) 1986-04-15
ZA828423B (en) 1983-09-28
JPH0318971B2 (en) 1991-03-13
EP0079587B1 (en) 1986-03-26
US4456036A (en) 1984-06-26
BR8206680A (en) 1983-10-04

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