WO1993019865A1 - Bending machine for simultaneously bending two individual wires superposed over each other - Google Patents

Bending machine for simultaneously bending two individual wires superposed over each other Download PDF

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Publication number
WO1993019865A1
WO1993019865A1 PCT/AT1993/000062 AT9300062W WO9319865A1 WO 1993019865 A1 WO1993019865 A1 WO 1993019865A1 AT 9300062 W AT9300062 W AT 9300062W WO 9319865 A1 WO9319865 A1 WO 9319865A1
Authority
WO
WIPO (PCT)
Prior art keywords
bending
lever
cutting
feed
individual wires
Prior art date
Application number
PCT/AT1993/000062
Other languages
German (de)
French (fr)
Inventor
Klaus Ritter
Gerhard Ritter
Walter Resch
Gerhard Schmidt
Original Assignee
Evg Entwicklungs- U.Verwertungsgesellschaft M.B.H.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Evg Entwicklungs- U.Verwertungsgesellschaft M.B.H. filed Critical Evg Entwicklungs- U.Verwertungsgesellschaft M.B.H.
Publication of WO1993019865A1 publication Critical patent/WO1993019865A1/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
    • B21F1/006—Bending wire other than coiling; Straightening wire in 3D with means to rotate the tools about the wire axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D11/00—Bending 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
    • B21D11/10—Bending specially adapted to produce specific articles, e.g. leaf springs
    • B21D11/12—Bending specially adapted to produce specific articles, e.g. leaf springs the articles being reinforcements for concrete
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
    • B21D43/006—Feeding elongated articles, such as tubes, bars, or profiles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F1/00—Bending wire other than coiling; Straightening wire

Definitions

  • the invention relates to a bending machine for simultaneously bending two superposed individual wires, in which a first straightening device, a feed device, a second straightening device and a retractable cutting device, which is provided with a fixed knife and with a movable knife, are successively along a working line. and a bending device with a bending table defining a bending plane are provided.
  • EP-Al-379 043 discloses a pair of scissors that can be moved in the production direction for a bending machine for bending strand-like material to form reinforcement stirrups and that is arranged in front of the bending device when viewed in the production direction.
  • the scissors have a guide for the material to be bent, which at the same time forms a fixed cutting edge, and a movable cutting edge.
  • the scissors i.e. the wire guide, together with the movable cutting edge, are briefly pivoted back out of the bending plane in order to allow the end piece of the bracket to bend and not to hinder the movements of the end piece during bending.
  • the scissors have to be moved back into the bending plane in order to be able to guide the material to be bent during the advancing and bending.
  • the object of the invention is to provide a bending machine which, during the bending of a strand of material into reinforcement stirrups, does not hinder the movements of bent legs of the reinforcement stirrup to be produced and at the same time is such that it does not deflect the bent legs from the bending plane and thus the bending enables a very flat reinforcement bar.
  • a bending machine of the type specified in the introduction is characterized in that the cutting device between a fixed wire guide for simultaneous Guiding two superimposed individual wires of a strand of material and for supporting the strand of material during bending and the bending device is arranged and that the cutting device is displaced during the entire bending process at least from the feed path of the upper single wire into a retracted position.
  • a scissor lever pivotally mounted in a stationary frame on which the knives are arranged and which has two side arms, a working cylinder, which is supported on the stationary frame, being pivoted on the one side arm for pivoting the scissor lever.
  • a two-armed cutting lever is preferably pivotally mounted in the scissor lever, the movable knife being arranged on one arm of the cutting lever and a working cylinder articulated on the other arm of the cutting lever, which cylinder is supported on the side arm of the scissor lever.
  • Figure la is a schematically illustrated bending machine according to the invention in plan view.
  • Fig. Lb in a schematic representation of the contour of a cover plate for the underlying devices of the bending machine
  • Fig. Lc an enlarged detail of the cutting device and a bending plate
  • Fig. 2 seen a schematic representation of a side view of the cutting device in the production direction
  • Fig. 3 seen a detail of the cutting device perpendicular to the direction of production.
  • the bending machine shown schematically in FIGS. 1b and 1c essentially has an inlet-side straightening device 1, a feed device 2, an outlet-side straightening device 3, a length measuring device 4, essentially along a working line XX Wire guide 5, a cutting device 6 and a bending device 7.
  • the inlet-side straightening device 1 consists of several straightening rollers 8 which are rotatably mounted in two opposite rows, the straightening rollers of one row being adjustable against the straightening rollers of the other row in accordance with the double arrow P-.
  • the outlet-side straightening device 3 is constructed analogously to the inlet-side straightening device 1. However, the plane in which all straightening rollers 7 of the straightening device 3 on the outlet side lie is rotated through 90 ° to the plane in which all straightening rollers 8 of the straightening device 1 on the inlet side lie.
  • the feed device 2 has at least one pair of feed rollers 9 which can be driven in both directions of rotation in accordance with the double arrow P «.
  • the strand of material is drawn off from the supply spools (not shown) according to the arrow P along the working line XX with the aid of the feed rollers 9 and fed to the bending device 7.
  • the wire guide 5 is arranged on a bracket 10 (FIG. 3) and has a front part 11 and a rear part 12, both of which are provided with corresponding recesses adapted to the shape and diameter of the material strand.
  • the wire guide 5 also serves as a counter-holder for the bending device 7, wherein at least the rear part 12 of the wire guide 5 can be adjusted against the front part 11 to adapt to different diameters of the material strand in accordance with the double arrow P.
  • the bending device 7 has a bending plate 13 which can be rotated in accordance with the double arrow Pg and which carries a central bending mandrel 14 and an eccentrically arranged bending tool 15.
  • the bending plate 13 is arranged in a recess 16 of a bending table 17 according to the double arrow P g so as to be displaceable perpendicular to the working line, the surface 18 of the bending table 17 defining the bending plane, which preferably assumes a position inclined to the vertical plane (FIG. 2).
  • the central bending mandrel 14 and the eccentrically arranged bending tool 15 cooperate with the wire guide 5 designed as a counter-holder, which must therefore be appropriately dimensioned to support the strand of material to be bent.
  • the inlet-side and outlet-side straightening devices 1 and 3, the feed device 2 and the length measuring device 4 are completely covered by a hinged cover plate 19 which extends to the cutting device 6 and partially covers the parts 11, 12 of the wire guide 5.
  • the end 19 'of the cover plate 19 facing the cutting device 6 is correspondingly flattened on all sides from the straightening device 3 to the cutting device 6 towards the bending plane 18, in order to reinforce a leg B which is already bent and points against the production direction P 3 when a reinforcing bar is bent (FIG. 3) not to hinder the reinforcement stirrup.
  • the cutting device 6 has a scissor arm 20, which in principle is designed as a one-armed lever with a free side arm 21 and a further side arm 22 and is pivotally mounted in the pivot point 23 in a stationary frame 24, which is only schematically indicated .
  • a working cylinder 25 is supported on the stationary frame 24, the piston 26 of which is articulated on the side arm 21.
  • the piston 26 is displaceable in accordance with the double arrow P-, so that the scissors lever 20 executes a corresponding pivoting movement in accordance with the double arrow P g about its pivot point 23.
  • a further working cylinder 27 is supported on the side arm 22 of the scissor lever 20, the piston 28 of which is articulated on an arm of a cutting lever 29.
  • the cutting lever 29 is designed as a two-armed lever and is rotatably mounted in a pivot point 30 in the scissor lever 20.
  • the piston 28 of the working cylinder 27 can be advanced in accordance with the double arrow P g , so that the cutting lever 29 executes a pivoting movement in accordance with the double arrow P "around its pivot point 30.
  • a knife 31 attached, which interacts with a corresponding fixed to the scissor lever 20, fixed knife 32.
  • the cutting device 6 operates as follows: To cut off a strand of material, which for example consists of two individual wires D1 and D2 lying one above the other, the working cylinder 25 is actuated, as a result of which the piston 26 is in the corresponding position In the direction of the double arrow P "and thus the scissors lever 20 is pivoted in the corresponding direction of the double arrow P g into its upper working position shown in dash-dotted lines in FIG. 3.
  • the scissors lever 20 is pivoted into a lower position after the cut has been made, which is shown in full lines in FIG. 3 and in which the upper edge 33 of the knife 31 does not hinder the movement path of a bent-back stirrup leg B and on the other hand one made of a single wire D1 the material strand can be severed at any time without additional positioning of the scissors lever 20.
  • the bent-back leg B is still somewhat deflected from the bending plane. This deflection from the bending plane 18 is one compared to the deflection bent back leg B 1 according to the prior art, however, by an angular amount "a" less, so that 6 reinforcement brackets can be bent with the cutting device according to the invention, which are flatter compared to the prior art and hardly gape apart.

Abstract

Described is a bending machine for simultaneously bending two individual wires superposed over each other, the machine having, located one after the other along a feed line, a first alignment device (1), a feed device (2), a second alignment device (3) and a retractable cutter (6) with a stationary blade and a mobile blade, plus a bending device (7) with a bending table which defines the plane of bending. The cutter is located between the bending device and a stationary wire guide (5) designed to feed in two superposed individual wires (D1, D2) in a continuous feed and to support the feed during the bending procedure and, during the whole of the bending procedure, to be displaced at least out of the feed line of the upper wire (D2) into a retracted position.

Description

Biegemaschine zum gleichzeitigen Biegen zweier über¬ einanderliegender EinzeldrähteBending machine for the simultaneous bending of two superposed individual wires
Die Erfindung betrifft eine Biegemaschine zum gleich¬ zeitigen Biegen zweier übereinanderliegender Einzeldrähte, in welcher entlang einer Arbeitslinie hintereinander eine erste Richteinrichtung, eine Vorschubeinrichtung, eine zweite Richteinrichtung und eine zurückziehbare Schneidvor¬ richtung, die mit einem feststehenden Messer und mit einem beweglichen Messer versehen ist, sowie eine Biegevorrich¬ tung mit einem eine Biegeebene definierendem Biegetisch vorgesehen sind. Aus der EP-Al-379 043 ist eine in Produktionsrichtung verschiebbare Schere für eine Biegemaschine zum Biegen von strangförmige Material zu Bewehrungsbügeln bekannt, die in Produktionsrichtung gesehen, vor der Biegevorrichtung angeordnet ist. Die Schere weist eine Führung für das zu biegende Material, die gleichzeitig eine feststehende Schneide bildet, und eine bewegliche Schneide auf. Nach dem Durchtrennen des Materials kann die Schere, d.h. die Drahtführung, gemeinsam mit der beweglichen Schneide kurzzeitig aus der Biegeebene zurückgeschwenkt werden, um ein Biegen des Endstückes des Bügels zu ermöglichen und die Bewegungen des Endstückes beim Biegen nicht zu behindern. Zum Biegen eines weiteren Bügels muß die Schere wieder in die Biegeebene zurückgefahren werden, um das zu biegende Material während des Vorschiebens und Biegens führen zu können.The invention relates to a bending machine for simultaneously bending two superposed individual wires, in which a first straightening device, a feed device, a second straightening device and a retractable cutting device, which is provided with a fixed knife and with a movable knife, are successively along a working line. and a bending device with a bending table defining a bending plane are provided. EP-Al-379 043 discloses a pair of scissors that can be moved in the production direction for a bending machine for bending strand-like material to form reinforcement stirrups and that is arranged in front of the bending device when viewed in the production direction. The scissors have a guide for the material to be bent, which at the same time forms a fixed cutting edge, and a movable cutting edge. After cutting the material, the scissors, i.e. the wire guide, together with the movable cutting edge, are briefly pivoted back out of the bending plane in order to allow the end piece of the bracket to bend and not to hinder the movements of the end piece during bending. To bend another stirrup, the scissors have to be moved back into the bending plane in order to be able to guide the material to be bent during the advancing and bending.
Aufgabe der Erfindung ist es, eine Biegemaschine zu schaffen, die während des Biegens eines Materialstranges zu Bewehrungsbügeln die Bewegungen abgebogener Schenkel des herzustellenden Bewehrungsbügels nicht behindert und zu- gleich derart beschaffen ist, daß sie die abgebogenen Schenkel nicht aus der Biegeebene ablenkt und damit das Biegen sehr flacher Bewehrungsbügel ermöglicht. Eine erfindungsgemäße Biegemaschine der einleitend angegebenen Art zeichnet sich dadurch aus, daß die Schneidvorrichtung zwischen einer ortsfesten Drahtführung zum gleichzeitigen Führen zweier übereinanderliegender Einzeldrähte eines Materialstranges sowie zum Abstützen des Materialstranges beim Biegen und der Biegevorrichtung angeordnet ist und daß die Schneidvorrichtung während des gesamten Biegevorganges zumindest aus der Zuführbahn des oberen Einzeldrahtes in eine zurückgezogene Stellung versetzt ist.The object of the invention is to provide a bending machine which, during the bending of a strand of material into reinforcement stirrups, does not hinder the movements of bent legs of the reinforcement stirrup to be produced and at the same time is such that it does not deflect the bent legs from the bending plane and thus the bending enables a very flat reinforcement bar. A bending machine of the type specified in the introduction is characterized in that the cutting device between a fixed wire guide for simultaneous Guiding two superimposed individual wires of a strand of material and for supporting the strand of material during bending and the bending device is arranged and that the cutting device is displaced during the entire bending process at least from the feed path of the upper single wire into a retracted position.
Gemäß einer bevorzugten Ausführungsform der Erfindung ist ein in einem ortsfesten Gestell schwenkbar gelagerter Scherenhebel vorgesehen, auf dem die Messer angeordnet sind und der zwei Seitenarme aufweist, wobei an dem einen Seitenarm ein sich am ortsfesten Gestell abstützender Arbeitszylinder zum Verschwenken des Scherenhebels ange¬ lenkt ist. Bei dieser Konstruktion ist vorzugsweise im Scherenhebel ein zweiarmiger Schneidhebel schwenkbar ge- lagert, wobei an dem einen Arm des Schneidhebels das bewegliche Messer angeordnet ist und an dem anderen Arm des Schneidhebels ein Arbeitszylinder angelenkt ist, der sich auf dem Seitenarm des Scherenhebels abstützt.According to a preferred embodiment of the invention, a scissor lever pivotally mounted in a stationary frame is provided, on which the knives are arranged and which has two side arms, a working cylinder, which is supported on the stationary frame, being pivoted on the one side arm for pivoting the scissor lever. In this construction, a two-armed cutting lever is preferably pivotally mounted in the scissor lever, the movable knife being arranged on one arm of the cutting lever and a working cylinder articulated on the other arm of the cutting lever, which cylinder is supported on the side arm of the scissor lever.
Weitere Merkmale der Erfindung werden nachfolgend an Hand eines in den Zeichnungen dargestellten Ausführungs¬ beispieles näher erläutert. Es zeigen:Further features of the invention are explained in more detail below with reference to an exemplary embodiment shown in the drawings. Show it:
Fig. la eine schematisch dargestellte Biegemaschine gemäß der Erfindung in der Draufsicht;Figure la is a schematically illustrated bending machine according to the invention in plan view.
Fig. lb in schematischer Darstellung die Kontur eines Abdeckbleches für die darunterliegenden Vorrichtungen der Biegemaschine;Fig. Lb in a schematic representation of the contour of a cover plate for the underlying devices of the bending machine;
Fig. lc einen vergrößerten Detailausschnitt der Schneidvorrichtung und eines Biegetellers;Fig. Lc an enlarged detail of the cutting device and a bending plate;
Fig. 2 in schematischer Darstellung eine Seitenansicht der Schneidvorrichtung in Produktionsrichtung gesehen, undFig. 2 seen a schematic representation of a side view of the cutting device in the production direction, and
Fig. 3 ein Detail der Schneidvorrichtung senkrecht zur Produktionsrichtung gesehen.Fig. 3 seen a detail of the cutting device perpendicular to the direction of production.
Die in den Fig. lb und lc schematisch dargestellte Biegemaschine weist im wesentlichen entlang einer Arbeits- linie X-X hintereinander eine einlaufseitige Richteinrich¬ tung 1, eine Vorschubeinrichtung 2, eine auslaufseitige Richteinrichtung 3, eine Längenmeßeinrichtung 4, eine Drahtführung 5, eine Schneidvorrichtung 6 und eine Biege¬ vorrichtung 7 auf.The bending machine shown schematically in FIGS. 1b and 1c essentially has an inlet-side straightening device 1, a feed device 2, an outlet-side straightening device 3, a length measuring device 4, essentially along a working line XX Wire guide 5, a cutting device 6 and a bending device 7.
Die einlaufseitige Richteinrichtung 1 besteht aus mehreren, in zwei gegenüberliegenden Reihen drehbar ge- lagerten Richtrollen 8, wobei die Richtrollen einer Reihe entsprechend dem Doppelpfeil P- gegen die Richtrollen der anderen Reihe anstellbar sind.The inlet-side straightening device 1 consists of several straightening rollers 8 which are rotatably mounted in two opposite rows, the straightening rollers of one row being adjustable against the straightening rollers of the other row in accordance with the double arrow P-.
Die auslaufseitige Richteinrichtung 3 ist analog der einlaufseitigen Richteinrichtung 1 aufgebaut. Hiebei ist jedoch die Ebene, in der alle Richtrollen 7 der auslauf- seitigen Richteinrichtung 3 liegen, zur Ebene, in der alle Richtrollen 8 der einlaufseitigen Richteinrichtung 1 liegen, um 90° gedreht.The outlet-side straightening device 3 is constructed analogously to the inlet-side straightening device 1. However, the plane in which all straightening rollers 7 of the straightening device 3 on the outlet side lie is rotated through 90 ° to the plane in which all straightening rollers 8 of the straightening device 1 on the inlet side lie.
Die Vorschubeinrichtung 2 weist zumindest ein Paar von in beiden Drehrichtungen entsprechend dem Doppelpfeil P« antreibbaren Vorschubrollen 9 auf. Der zu biegendeThe feed device 2 has at least one pair of feed rollers 9 which can be driven in both directions of rotation in accordance with the double arrow P «. The one to be bent
Materialstrang wird mit Hilfe der Vorschubrollen 9 von nicht dargestellten Vorratsspulen entsprechend dem Pfeil P entlang der Arbeitslinie X-X abgezogen und der Biegevor- richtung 7 zugeführt. Die Drahtführung 5 ist auf einer Konsole 10 (Fig. 3) angeordnet und weist einen vorderen Teil 11 und einen hinteren Teil 12 auf, die beide mit entsprechenden, an die Form und den Durchmesser des Materialstranges angepaßten Ausnehmungen versehen sind. Die Drahtführung 5 dient gleichzeitig als Gegenhalter für die Biegevorrichtung 7, wobei zumindest der hintere Teil 12 der Drahtführung 5 gegen den vorderen Teil 11 zur Anpassung an unterschiedliche Durchmesser des Materialstranges ent¬ sprechend dem Doppelpfeil P. anstellbar ist. Die Biegevorrichtung 7 weist einen entsprechend dem Doppelpfeil Pg drehbaren Biegeteller 13 auf, der einen zentralen Biegedorn 14 und ein exzentrisch angeordnetes Biegewerkzeug 15 trägt. Der Biegeteller 13 ist in einer Ausnehmung 16 eines Biegetisches 17 entsprechend dem Doppelpfeil Pg senkrecht zur Arbeitslinie verschiebbar angeordnet, wobei die Oberfläche 18 des Biegetisches 17 die Biegeebene definiert, die vorzugsweise eine zur Vertikal¬ ebene geneigte Stellung (Fig. 2) einnimmt. Beim Biegen eines Bewehrungsbügels wirken der zentrale Biegedorn 14 und das exzentrisch angeordnete Biegewerkzeug 15 mit der als Gegenhalter ausgebildeten Drahtführung 5 zusammen, die daher zum Abstützen des zu biegenden Materialstranges entsprechend stark dimensioniert sein muß.The strand of material is drawn off from the supply spools (not shown) according to the arrow P along the working line XX with the aid of the feed rollers 9 and fed to the bending device 7. The wire guide 5 is arranged on a bracket 10 (FIG. 3) and has a front part 11 and a rear part 12, both of which are provided with corresponding recesses adapted to the shape and diameter of the material strand. The wire guide 5 also serves as a counter-holder for the bending device 7, wherein at least the rear part 12 of the wire guide 5 can be adjusted against the front part 11 to adapt to different diameters of the material strand in accordance with the double arrow P. The bending device 7 has a bending plate 13 which can be rotated in accordance with the double arrow Pg and which carries a central bending mandrel 14 and an eccentrically arranged bending tool 15. The bending plate 13 is arranged in a recess 16 of a bending table 17 according to the double arrow P g so as to be displaceable perpendicular to the working line, the surface 18 of the bending table 17 defining the bending plane, which preferably assumes a position inclined to the vertical plane (FIG. 2). When bending a reinforcement bracket, the central bending mandrel 14 and the eccentrically arranged bending tool 15 cooperate with the wire guide 5 designed as a counter-holder, which must therefore be appropriately dimensioned to support the strand of material to be bent.
Die einlaufseitige und die auslaufseitige Richtein¬ richtung 1 bzw. 3, die Vorschubeinrichtung 2 sowie die Längenmeßeinrichtung 4 werden durch ein abklappbares Abdeckblech 19 vollständig abgedeckt, das bis zur Schneid- Vorrichtung 6 reicht und die Teile 11, 12 der Drahtführung 5 teilweise überdeckt. Das der Schneidvorrichtung 6 zugewandte Ende 19' des Abdeckbleches 19 ist von der Richteinrichtung 3 zur Schneidvorrichtung 6 hin allseitig zur Biegeebene 18 hin entsprechend abgeflacht, um beim Biegen eines Bewehrungsbügels die Bewehrung eines bereits abgebogenen, gegen die Produktionsrichtung P3 weisenden Schenkels B (Fig. 3) des Bewehrungsbügels nicht zu be¬ hindern.The inlet-side and outlet-side straightening devices 1 and 3, the feed device 2 and the length measuring device 4 are completely covered by a hinged cover plate 19 which extends to the cutting device 6 and partially covers the parts 11, 12 of the wire guide 5. The end 19 'of the cover plate 19 facing the cutting device 6 is correspondingly flattened on all sides from the straightening device 3 to the cutting device 6 towards the bending plane 18, in order to reinforce a leg B which is already bent and points against the production direction P 3 when a reinforcing bar is bent (FIG. 3) not to hinder the reinforcement stirrup.
Die Schneidvorrichtung 6 weist gemäß Fig. 2 einen Scherenarm 20 auf, der im Prinzip als einarmiger Hebel mit einem freien Seitenarm 21 und einem weiteren Seitenarm 22 ausgebildet ist und im Drehpunkt 23 in einem nur schema¬ tisch angedeuteten ortsfesten Gestell 24 schwenkbar ge¬ lagert ist. Am ortsfesten Gestell 24 stützt sich ein Arbeitszylinder 25 ab, dessen Kolben 26 am Seitenarm 21 angelenkt ist. Der Kolben 26 ist entsprechend dem Doppel¬ pfeil P- verschiebbar, so daß der Scherenhebel 20 eine entsprechende Schwenkbewegung entsprechend dem Doppelpfeil Pg um seinen Drehpunkt 23 ausführt. Am Seitenarm 22 des Scherenhebels 20 stützt sich ein weiterer Arbeitszylinder 27 ab, dessen Kolben 28 an einem Arm eines Schneidhebels 29 angelenkt ist. Der Schneidhebel 29 ist als zweiarmiger Hebel ausgebildet und in einem Drehpunkt 30 im Scherenhebel 20 drehbar gelagert. Der Kolben 28 des Arbeitszylinders 27 ist entsprechend dem Doppelpfeil Pg vorschiebbar, so daß der Schneidhebel 29 eine Schwenkbewegung entsprechend dem Doppelpfeil P„ um seinen Drehpunkt 30 ausführt. An dem anderen Ende des Schneidhebels 29 ist ein Messer 31 angebracht, das mit einem entsprechenden am Scherenhebel 20 befestigten, feststehenden Messer 32 zusammenwirkt.According to FIG. 2, the cutting device 6 has a scissor arm 20, which in principle is designed as a one-armed lever with a free side arm 21 and a further side arm 22 and is pivotally mounted in the pivot point 23 in a stationary frame 24, which is only schematically indicated . A working cylinder 25 is supported on the stationary frame 24, the piston 26 of which is articulated on the side arm 21. The piston 26 is displaceable in accordance with the double arrow P-, so that the scissors lever 20 executes a corresponding pivoting movement in accordance with the double arrow P g about its pivot point 23. A further working cylinder 27 is supported on the side arm 22 of the scissor lever 20, the piston 28 of which is articulated on an arm of a cutting lever 29. The cutting lever 29 is designed as a two-armed lever and is rotatably mounted in a pivot point 30 in the scissor lever 20. The piston 28 of the working cylinder 27 can be advanced in accordance with the double arrow P g , so that the cutting lever 29 executes a pivoting movement in accordance with the double arrow P "around its pivot point 30. At the other end of the cutting lever 29 is a knife 31 attached, which interacts with a corresponding fixed to the scissor lever 20, fixed knife 32.
Die Schneidvorrichtung 6 arbeitet, wie den Fig. 2 und 3 zu entnehmen ist, wie folgt: Zum Abtrennen eines Materialstranges, der beispielsweise aus zwei übereinander- liegenden Einzeldrähten Dl und D2 besteht, wird der Arbeitszylinder 25 betätigt, wodurch der Kolben 26 in der entsprechenden Richtung des Doppelpfeiles P„ vorgeschoben und damit der Scherenhebel 20 in der entsprechenden Richtung des Doppelpfeiles Pg in seine in Fig. 3 strich¬ punktiert dargestellte obere Arbeitsstellung geschwenkt ird.As can be seen from FIGS. 2 and 3, the cutting device 6 operates as follows: To cut off a strand of material, which for example consists of two individual wires D1 and D2 lying one above the other, the working cylinder 25 is actuated, as a result of which the piston 26 is in the corresponding position In the direction of the double arrow P "and thus the scissors lever 20 is pivoted in the corresponding direction of the double arrow P g into its upper working position shown in dash-dotted lines in FIG. 3.
Durch Betätigung des Arbeitszylinders 27 wird der Kolben 28 in der entsprechenden Richtung des Doppelpfeiles p vorgeschoben und damit der Schneidhebel 29 in der entsprechenden Richtung des Doppelpfeiles P1Q geschwenkt, wodurch der Materialstrang Dl, D2 durchtrennt wird.By actuating the working cylinder 27, the piston 28 is advanced in the corresponding direction of the double arrow p and thus the cutting lever 29 is pivoted in the corresponding direction of the double arrow P 1Q , as a result of which the strand of material D1, D2 is severed.
Würde der Scherenhebel 20 nach dem Durchtrennen des Materialstranges in der oberen Arbeitsstellung verharren, so würde die Oberkante 33' des Messers 31 beim Biegen eines neuen Bewehrungsbügels die Bewegungsbahn eines zurückge¬ bogenen Schenkels derart behindern und aus der Biegeebene 18 ablenken, daß der zurückgebogene Schenkel die in Fig. 3 strichpunktiert dargestellte Stellung B' einnehmen müßte. Erfindungsgemäß wird der Scherenhebel 20 nach Ausführung des Schnittes in eine untere Stellung geschwenkt, die in Fig. 3 in vollen Linien dargestellt ist und in welcher die Oberkante 33 des Messers 31 die Bewegungsbahn eines zurückgebogenen Bügelschenkels B nicht behindert und anderseits ein aus einem einzigen Einzeldraht Dl bestehen¬ der Materialstrang ohne zusätzliches Positionieren des Scherenhebels 20 jederzeit durchtrennt werden kann. Da die Drahtführung 5 zum Führen zweier übereinander liegender Einzeldrähte Dl, D2 in ihrer Funktion als Gegenhalter entsprechend dimensioniert sein muß und über die Biegeebene 18 hinausragt, wird der zurückgebogene Schenkel B immer noch etwas aus der Biegeebene abgelenkt. Diese Ablenkung aus der Biegeebene 18 ist gegenüber der Ablenkung eines zurückgebogenen Schenkels B1 nach dem Stand der Technik jedoch um einen Winkelbetrag "a" geringer, so daß mit der erfindungsgemäßen Schneidvorrichtung 6 Bewehrungsbügel gebogen werden können, die gegenüber dem Stand der Technik flacher sind und kaum auseinanderklaffen.If the scissors lever 20 remained in the upper working position after severing the strand of material, the upper edge 33 'of the knife 31 would hinder the movement path of a bent leg and deflect it from the bending plane 18 in such a way that the bent back leg would deflect the position B 'shown in dash-dotted lines in FIG. According to the invention, the scissors lever 20 is pivoted into a lower position after the cut has been made, which is shown in full lines in FIG. 3 and in which the upper edge 33 of the knife 31 does not hinder the movement path of a bent-back stirrup leg B and on the other hand one made of a single wire D1 the material strand can be severed at any time without additional positioning of the scissors lever 20. Since the wire guide 5 for guiding two individual wires D1, D2 lying one above the other must be appropriately dimensioned in its function as a counter-holder and protrudes beyond the bending plane 18, the bent-back leg B is still somewhat deflected from the bending plane. This deflection from the bending plane 18 is one compared to the deflection bent back leg B 1 according to the prior art, however, by an angular amount "a" less, so that 6 reinforcement brackets can be bent with the cutting device according to the invention, which are flatter compared to the prior art and hardly gape apart.
Es versteht sich, daß die Erfindung nicht auf das in den Zeichnungen dargestellte Ausführungsbeispiel beschränkt ist, dieses vielmehr im Rahmen des allgemeinen Erfindungs¬ gedankens verschiedentlich abgehandelt werden kann. Im Rahmen der Erfindung ist es auch möglich, den Scherenhebel 20 so weit abzusenken, daß er in seiner zurückgezogenen Stellung mit der Biegeebene 18 fluchtet. Es versteht sich ferner, daß zur Steuerung der Funktionsweise der Biege¬ maschine eine (nicht gezeigte) elektronische Steuereinrich- tung vorgesehen ist. It goes without saying that the invention is not limited to the exemplary embodiment shown in the drawings, but that it can be dealt with in various ways within the framework of the general inventive concept. In the context of the invention, it is also possible to lower the scissor lever 20 so far that it is aligned with the bending plane 18 in its retracted position. It also goes without saying that an electronic control device (not shown) is provided to control the functioning of the bending machine.

Claims

Patentansprüche: Claims:
1. Biegemaschine zum gleichzeitigen Biegen zweier übereinanderliegender Einzeldrähte, in welcher entlang einer Arbeitslinie hintereinander eine erste Richteinrich¬ tung, eine Vorschubeinrichtung, eine zweite Richteinrich- tung und eine zurückziehbare Schneidvorrichtung, die mit einem feststehenden Messer und mit einem beweglichen Messer versehen ist, sowie eine Biegevorrichtung mit einem eine Biegeebene definierendem Biegetisch vorgesehen sind, dadurch gekennzeichnet, daß die Schneidvorrichtung (6) zwischen einer ortsfesten Drahtführung (5) zum gleich¬ zeitigen Führen zweier übereinanderliegender Einzeldrähte (Dl, D2) eines Materialstranges sowie zum Abstützen des Materialstranges beim Biegen und der Biegevorrichtung (7) angeordnet ist und daß die Schneidvorrichtung (6) während des gesamten Biegevorganges zumindest aus der Zuführbahn des oberen Einzeldrahtes (D2) in eine zurückge¬ zogene Stellung versetzt ist.1. Bending machine for the simultaneous bending of two superposed individual wires, in which a first straightening device, a feed device, a second straightening device and a retractable cutting device, which is provided with a fixed knife and with a movable knife, and one along a working line Bending device with a bending table defining a bending plane are provided, characterized in that the cutting device (6) between a fixed wire guide (5) for simultaneously guiding two superimposed individual wires (D1, D2) of a strand of material and for supporting the strand of material during bending and Bending device (7) is arranged and that the cutting device (6) is displaced into a retracted position during the entire bending process, at least from the feed path of the upper individual wire (D2).
2. Biegemaschine nach Anspruch 1, dadurch gekenn¬ zeichnet, daß ein in einem ortsfesten Gestell (24) schwenkbar gelagerter Scherenhebel (20) vorgesehen ist, auf dem die Messer (31, 32) angeordnet sind und der zwei Seitenarme (21, 22) aufweist, wobei an dem einen Seitenarm (21) ein sich am ortsfesten Gestell (24) abstützender Arbeitszylinder (25) zum Verschwenken des Scherenhebels (20) angelenkt ist.2. Bending machine according to claim 1, characterized gekenn¬ characterized in that a pivotally mounted scissors lever (20) is provided in a fixed frame (24) on which the knives (31, 32) are arranged and the two side arms (21, 22) A working cylinder (25), which is supported on the stationary frame (24), is pivoted on one side arm (21) for pivoting the scissor lever (20).
3. Biegemaschine nach Anspruch 2, dadurch gekenn¬ zeichnet, daß im Scherenhebel (20) ein zweiarmiger Schneid¬ hebel (29) schwenkbar gelagert ist, wobei an dem einen Arm des Schneidhebels (29) das bewegliche Messer (31) angeord- net ist und an dem anderen Arm des Schneidhebels (29) ein Arbeitszylinder (27) angelenkt ist, der sich auf dem Seitenarm (22) des Scherenhebels (20) abstützt.3. Bending machine according to claim 2, characterized gekenn¬ characterized in that a two-armed cutting lever (29) is pivotally mounted in the scissor lever (20), the movable knife (31) being arranged on one arm of the cutting lever (29) and on the other arm of the cutting lever (29) a working cylinder (27) is articulated, which is supported on the side arm (22) of the scissor lever (20).
4. Biegemaschine nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß zum vollständigen Abdecken der Richteinrichtungen (1, 3), der Vorschubeinrichtung (2) und zum teilweisen Abdecken der Drahtführung (5) ein abklapp- bares Abdeckblech (19) vorgesehen ist, welches zumindest in einem Bereich (19') von der Richteinrichtung (3) bis zur Schneidvorrichtung (6) zur Biegeebene (18) hin allseitig abgeflacht ausgebildet ist. 4. Bending machine according to one of claims 1 to 3, characterized in that for completely covering the straightening devices (1, 3), the feed device (2) and for partially covering the wire guide (5) a hinged bares cover plate (19) is provided, which is formed flattened on all sides at least in an area (19 ') from the straightening device (3) to the cutting device (6) to the bending plane (18).
PCT/AT1993/000062 1992-04-03 1993-04-01 Bending machine for simultaneously bending two individual wires superposed over each other WO1993019865A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA702/92 1992-04-03
AT70292 1992-04-03

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0864387A1 (en) * 1997-03-13 1998-09-16 Schnell S.p.A. Twin-wire straightener for metallic materials in wire form and the like.
EP0865842A2 (en) * 1997-03-20 1998-09-23 Schnell S.p.A. Method and machine for automatically bending profiled elements and the like

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113210528A (en) * 2021-04-28 2021-08-06 玖创建设有限公司 Steel bar bending equipment for building construction and bending method thereof

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Publication number Priority date Publication date Assignee Title
DE456515C (en) * 1925-07-17 1928-02-25 Demag Akt Ges Scissors for cutting up rolled material
EP0379030A1 (en) * 1989-01-18 1990-07-25 M.E.P. Macchine Elettroniche Piegatrici S.p.A. Movable shears upstream of a bending assembly and method to bend the trailing end of bars
EP0502341A1 (en) * 1991-02-28 1992-09-09 M.E.P. Macchine Elettroniche Piegatrici S.p.A. Assembly to bend bundles of rods

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE456515C (en) * 1925-07-17 1928-02-25 Demag Akt Ges Scissors for cutting up rolled material
EP0379030A1 (en) * 1989-01-18 1990-07-25 M.E.P. Macchine Elettroniche Piegatrici S.p.A. Movable shears upstream of a bending assembly and method to bend the trailing end of bars
EP0502341A1 (en) * 1991-02-28 1992-09-09 M.E.P. Macchine Elettroniche Piegatrici S.p.A. Assembly to bend bundles of rods

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0864387A1 (en) * 1997-03-13 1998-09-16 Schnell S.p.A. Twin-wire straightener for metallic materials in wire form and the like.
EP0865842A2 (en) * 1997-03-20 1998-09-23 Schnell S.p.A. Method and machine for automatically bending profiled elements and the like
EP0865842A3 (en) * 1997-03-20 2000-05-17 Schnell S.p.A. Method and machine for automatically bending profiled elements and the like
US6295857B1 (en) 1997-03-20 2001-10-02 Schnell S.P.A. Method and machine for automatically bending profiled elements and the like

Also Published As

Publication number Publication date
GR940300042T1 (en) 1994-07-29
EP0587842A1 (en) 1994-03-23

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