EP1925377A1 - Bending machine for manufacturing of concrete reinforcement cages - Google Patents

Abstract

An automatic bending assembly (3) for an electrically welded wire cage (1) of complex shape, has alternating slightly bent lines along an orthogonal line with respect to the feed axis of the woven wire. The bending assembly is anchored to the floor at four or more points.

Description

field of use

The present invention relates to an automatic bending machine or machine for self-arching complex cages obtained from electro-welded wire meshes which alternately have a slightly inclined line of curvature on the orthogonal line with respect to the feed axis of the mesh itself, as well as equivalent technical solutions ,

The invention finds in the automatic series production of the so-called cylindrical, prismatic or frustoconical cages, which are used in the field of civil engineering as reinforcement for reinforcing the concrete structures, and / or the elements of various three-dimensional geometric shapes, by successive bent on itself bends prefabricated electro-welded wire mesh to be produced, application.

The invention is applicable to the various technical solutions set forth in the present specification for the automated equipment for the manufacture of complex cages and / or three-dimensional structures produced by programmed bends of electro-welded wire meshes to the desired dimensions.

State of the art

Various automated methods are known in the prior art, in which electro-welded wire mesh is used for the production of reticulated metal cages and / or structures, which are applicable in the field of civil engineering. They produce many elements with the most diverse geometric three-dimensional designs such as cylinders, prisms, truncated cone, truncated pyramid. Furthermore, the prefabricated electro-welded wire meshes are known, which are flat and have a rectangular shape or wound on a roll or endless type, especially as they are produced in such a way and apply directly to the production of cages on suitable automated line systems application.

It has been found that the cages are formed with multiple inner layers or consecutive and curved bends if they require further reinforcement to withstand the required mechanical strength of the concrete beds. At present, in these special cases with the use of the known machines Disadvantages accompanied, in particular when the inner layers touch the successive and further outward layer of the cage due to their extent. These are not properly closed as planned especially since the longitudinal bars of the electro-welded wire mesh (with respect to the feed direction of the same during the bending phase) mutually disturbing.

To overcome this drawback, one nowadays engages manually - and with little effect - on the three-dimensional structure which is already bent and in the phase of the further curved bend, by transversal movement with respect to the advancing direction of the bend Braid is slightly shifted (with the displacement exceeds the diameter of the Längsrunde iron). Alternatively, one intervenes by making bends of the inner layers whose dimensions are less than those of the successive outer layer.

In order to overcome the above drawbacks and to obtain greater advantages, the Applicant has planned, tested and provided some equivalent technical solutions according to the present invention.

Object of the invention

• in der Bereitstellung einer automatischen, also keine manuellen (ungenauen und unbeständigen) Eingriffe erfordernden Biegeanlage oder -maschine für die aufeinander folgende Biegung auf sich gebogener und mehrschichtiger Art des elektrogeschweißten Drahtgeflechtes, um einen aus aufeinander folgenden Biegungsmehrschichten bestehenden, die erwünschten planmäßigen Maße aufweisenden einwandfrei schließbaren netzförmigen Käfig für das Bauwesen herzustellen;
• in der Bereitstellung einer automatischen Biegegruppe, die in der Lage ist, die Qualität des mehrschichtigen fertigen Produktes mittels ihrer leichten Neigung in Bezug auf die Orthogonalität der Vorschubrichtung des elektrogeschweißten Geflechtes zu gewährleisten, die abwechselnder Art (einmal in eine Richtung, dann in die andere Richtung) in der Phase der Überlagerung der Schichten ist. Auf diese Art und Weise wird eine Biegung erzeugt, die in Bezug auf die Außenschicht leicht geneigt ist, wodurch die Stellung nebeneinander der schichtweise gebogenen Längsrundeisen, anstatt ihrer Überlagerung, die Winkelverzerrungen der gebogenen Seiten hervorruft, begünstigt wird;
• in der Bereitstellung einer Biegegruppe für elektrogeschweißte Drahtgeflechte, um komplexe netzförmige Käfige und Strukturen für das Bauwesen zu erzeugen;
• in der Bereitstellung einer Biegegruppe für elektrogeschweißte Drahtgeflechte, die in der Lage ist, die Vielzahl der auf einem einzigen Kasten angebrachten festen zentralen Biegezapfen während der Anfangsphase der automatischen Biegung einer auf sich gebogenen Schicht zu steuern, um die aneinander gereihte Nerbeneinanderstellung der Längsrundeisen zu bewirken, die das den Käfig bildende Drahtgeflecht darstellen, die vorher mit jenen der letzten Schicht gebogen worden sind. Diese technische Lösung ist mit jener, die vorstehend erwähnt worden ist, gleichwertig und ermöglicht es, das gleiche Ergebnis zu erzielen bzw. eine leichte Ablenkungstendenz der Längsrundeisen während der Biegungsphase. Diese Ablenkungen erfolgen bei aufeinander folgenden Biegungen auf abwechselnde Art und Weise und verhindern dadurch unerwünschte Verformungen des fertig gestellten Käfigs;
• in der Bereitstellung einer als Alternative zu den vorstehend erwähnten technischen Lösungen geltenden zweistirnigen Biegegruppe für elektrogeschweißte Drahtgeflechte, die oberflächlich besonders verarbeitete Biegezapfen mit ausgeprägter Konizität (anstatt solcher, die einfach zylindrisch sind) im Biegeabschnitt, als äußere bewegliche Biegezapfen stromaufwärts und stromabwärts von den festen zentralen Biegezapfen aufweist, um den Widerstand des Metalls auszunutzen, das dazu neigt, während der Biegungsphase eine Lage einzunehmen, die sich von der des Rundeisens unterscheidet, und folglich das Rundeisen während der Biegungsphase leicht seitlich zu verschieben. Auf diese Art und Weise überlagert das gebogene Rundeisen nicht das auf der Außenschicht angebrachte entsprechende Rundeisen, sondern stellt sich nebenan und übt also keine störende Wirkung auf das vorhergehende Rundeisen aus. In diesem Falle werden die zwei äußeren Biegearme lediglich radial zu den zentralen Zapfen gesteuert;
• in der Bereitstellung einer Biegemaschine, die als Alternative zur vorstehend genannten gilt, wobei sie die technische Abwandlung aufweist, die darin besteht, dass die zwei äußeren Biegearme mit der Biegestange ausgestattet sind, die aus einer Reihenfolge von kreisförmigen einen Halbkreisquerschnitt aufweisenden Vertiefungen besteht, und ferner werden die Stangen quer zur Vorschubrichtung des Geflechtes während der Biegung gesteuert, um die Längsrundeisen, die das den Käfig bildende Geflecht darstellen, seitlich abzulenken. In diesem Falle werden die Biegestangen nicht nur mit einer idealen Bahn zur Durchführung der Biegung des Rundeisens gesteuert, sondern verschieben sich gleichzeitig in Querrichtung, damit die seitliche Nebeneinanderstellung der Rundeisen bei mehrschichtigen Biegungen gefördert wird;
• in der Bereitstellung einer automatischen Biegegruppe, die in der Lage ist, die Gleichförmigkeit des vorgefertigten Produktes bei Einhaltung der planmäßigen Endmaße zu gewährleisten.

The object of the present invention thus consists of the following:

• in the provision of an automatic, so no manual (inaccurate and inconstant) intervention requiring bending equipment or machine for the successive bending curved on and multilayered type of electro-welded wire mesh to a consisting of successive bending multilayers, the desired planned dimensions having perfectly closable manufacture reticulated cage for the construction industry;
• in the provision of an automatic bending group capable of ensuring the quality of the multi-layered finished product by its slight inclination with respect to the orthogonality of the feed direction of the electro-welded braid, of the alternating type (once in one direction, then in the other direction ) in the phase of superposition of the layers. In this way, a bend is created which is slightly inclined with respect to the outer layer, whereby the position adjacent to one another of the layered longitudinal bars, instead of their superposition, causes the angular distortions of the curved sides, is favored;
• to provide a bending group for electro-welded wire mesh to create complex reticulated cages and structures for the construction industry;
• in the provision of a bending group for electrowelded wire mesh, which in is capable of controlling the plurality of fixed central pivot pins mounted on a single box during the initial phase of the automatic bending of a curled layer to effect the juxtaposed juxtaposition of the longitudinal bars constituting the wire mesh constituting the cage previously provided with those of the last shift have been bent. This technical solution is equivalent to the one mentioned above and makes it possible to achieve the same result or a slight deflection tendency of the longitudinal bars during the bending phase. These deflections occur in successive bends in an alternating manner and thereby prevent undesirable deformations of the finished cage;
• in the provision of a two-part electro-welded wire mesh bending assembly as an alternative to the above-mentioned technical solutions, the superficially processed bent cones (instead of ones which are simply cylindrical) in the bending section as externally movable flexure pins upstream and downstream of the fixed central ones Bend pin has to exploit the resistance of the metal, which tends to take during the bending phase a position that differs from that of the round iron, and thus easily move the round iron during the bending phase laterally. In this way, the curved bar iron does not overlap the corresponding round bar mounted on the outer layer, but adjoins it and thus exerts no disturbing effect on the previous round bar. In this case, the two outer bending arms are controlled only radially to the central pin;
• in the provision of a bending machine as an alternative to the above, having the technical modification that the two outer bending arms are equipped with the bending bar consisting of an order of circular half-circle cross-section depressions, and further The bars are controlled transversely to the direction of advance of the braid during the bending to laterally deflect the longitudinal bars, which constitute the cage forming braid. In this case, the bending bars are not only controlled with an ideal path for performing the bending of the round bar, but at the same time move transversely, so that the lateral juxtaposition of the round bars is promoted in multilayer bends;
• in the provision of an automatic bending group, which is able to ensure the uniformity of the prefabricated product in compliance with the planned final dimensions.

Essence of the invention

The objects of the invention are according to the features of the main claim and / or solves any other claim contained in this patent by providing an automatic bending group or bending machine of a two-pronged type which is capable of producing complex cages or three-dimensional reticular structures consisting of successively continuous multilayers, avoiding the superposition of the longitudinal bars by: they are strung together during the bending phases. These construction products ensure compliance with the required measures, especially since automatic production makes it possible to provide perfectly closed and finished products, without deformations, even of a partial nature, or tensions of some of the cage forming parts.

To a complex reticulated cage d. H. with continuously superimposed and superimposed electro-welded wire mesh multi-layers, while respecting the rules of proper workmanship while ensuring the orderly dimensions, it is necessary to avoid the aforementioned drawbacks by providing a two-line net bending group or machine, which is able to intervene at the time of the superimposed multilayer bends in order to prevent the overlapping (from inside to outside) of the longitudinal bars of the net (which have the same orientation of the feed direction of the braid).

To achieve this aim, the applicant of the present invention has advantageously eliminated the disadvantages, at least with four possible technically equivalent modifications.

A first solution of the present invention is to intervene on the two-pronged bending group or machine which operates in lines for the manufacture of complex cages for construction, starting from electro-welded wire mesh and which is transverse to the flow of the wire mesh. The disadvantage of overlapping the longitudinal bars is eliminated by pivotally anchoring the transverse bending machine in the center line and automatically controlling it at the time of critical bending so as to be slightly inclined with respect to its basic orthogonality, thereby bending and stacking the longitudinal bars promoted two superimposed layers. In fact, if the bending machine is tilted slightly, it makes a bend that is not parallel to the previous one, so the longitudinal bars can not be superimposed, but are strung together. Of course, the successive bend alternately takes place with an inclination opposite to the previous one, compensating for the inclined bends so that manufactured cages are made in the form of straight prisms in consideration of the planned goals.

This technical solution provides a hinged attachment of the machine to the ground or on another support surface and the use of one or two attached at the ends automatically controlled actuators, which set the entire bending machine only at the necessary time in motion or in the phase of bending and the non-occurring superposition of the round bars. The inclination movement of the machine with respect to the feed direction of the electro-welded wire mesh is of alternating and automatic type and the extent of the angular deflection is in relation to the diameter of the longitudinal round bars which form the wire mesh.

A second concept of the present invention is the stable and stable mounting of the bending machine, being arranged orthogonal to the feed direction of the electro-welded wire mesh. The fixed, central, C-shaped pin carrying box of the bending machine is mounted movably along the bending machine, the displacements being controlled automatically by suitable means located at the two ends. This box, which carries the plurality of fixed central bending pins, is displaced by control and force at the time of rotation of the outer bending pins, or shifts during this bending phase, bending the longitudinal bars of the mesh laterally. In this way, these bar irons are deflected, for which reason they are lined up with the previous and the corresponding outer bar irons instead of being superimposed on successive multilayers in successive bends. To ensure the displacement of the round bars during the bending phase, the central C-shaped pins on the underside of the horizontal portion, which determines the true bend, a circular arc incision to the maintenance of the position and the fixed tension of the round iron during the transverse displacement of the pins in Over the bending phase, which overlays a previous, secure.

A third concept of the present invention is to provide a two-axis machine for bending electro-welded wire mesh, which assumes a fixed and orthogonal position with respect to the feed direction of the braid. In this machine, the modification to the bending bars is articulated on a vertical surface (orthogonal to the axis of the central main pegs) located upstream and downstream of the central main bending pegs. The rods, which are set in motion by suitable bending arms, are not cylindrical in nature, but have conical seats in the passage positions of the longitudinal bars which, during the bending phase, have the function of laterally deflecting the bar iron slightly so that the curved side is the possible one previous page does not exceed, but next to it. The taper is responsible for distracting the round iron; in fact, if there is a bending force is exposed, it seeks - due to its own mechanical strength - to a position of lesser tension, which corresponds to that of the higher radius of curvature (with a diameter which is smaller than the portion of the conical seat of the bending rod).

A fourth technical solution, which is equivalent to those described above, is similar to the third, i. H. It is intended to use the bending bars, which consist of a plurality of seats or successive continuous cuts with a semicircular longitudinally hollowed-out cross-section which extend in a circle over the entire surface. These cuts can have the same or different dimensions. Each rod is actuated by two actuators mounted at the ends, which function to displace the longitudinal bars transversely (to the direction of advance of the braid) during the bending phase: thereby shifting the sides of the rods during the bending phases in a successive manner. Consequently, the rods move not only in an articulated manner parallel to the braid advance, but also orthogonally during the flexing phase.

This latter solution provides an alternative of equivalent technical type, using steeply threaded rods as flexure rods that are self-rotating during the bending phase, thereby displacing the longitudinal rods rather than moving transversely to the wire mesh.

The present invention solves the underlying objects and overcomes the known disadvantages that arise in the phases of successive multi-layer bending in complex cages used in construction, by automatically, without manual work of the operators, even sporadic nature, and perfectly in relation be made on the molds and the planned dimensions.

Description of the drawings

• Fig. 1 eine Seitenansicht eines aus elektrogeschweißtem Drahtgeflecht bestehenden Käfigs komplexer Form für das Bauwesen darstellt;
• Fig. 2 eine Vorderansicht eines dreidimensionalen Käfigs aus der vorhergehenden Figur darstellt, wobei die aneinander gereihte Nebeneinanderstellung der gebogenen Längsrundeisen hervorgehoben wird;
• Fig. 3 eine Draufsicht der schwenkbar gesteuerten zweistirnigen automatischen Biegemaschine veranschaulicht, die in der Mittellinie schwenkbar verankert ist und von einem Aktuator betätigt wird. Die Maschine ist linear und steht orthogonal zur Vorschubrichtung des elektrogeschweißten Geflechtes;
• Fig. 4 eine teilweise Vorderansicht der Gruppe der zentralen Hauptbiegezapfen aufzeigt, die auf einem geeigneten Schlitten angebracht sind, der von geeigneten Aktuatormitteln automatisch und genau gesteuert wird;
• Fig. 5 eine Seitenansicht eines Hauptbiegezapfens darstellt, wobei die drei auf der Unterseite des Biegezahnes ausgebildeten halbkreisförmigen Nuten hervorgehoben werden;
• Fig. 6 eine Seitenansicht der Biegegruppe veranschaulicht, wobei die Biegestangen hervorgehoben werden, die stromaufwärts und stromabwärts vom zentralen Hauptzapfen auf Armen angebracht sind;
• Fig. 7 eine teilweise Draufsicht aufzeigt, die stromaufwärts und stromabwärts die zentralen Biegezapfen und die zwei Biegestangen mit besonderen Kegelbuchsen zum Ablenken der Längsrundeisen des Geflechtes während der Biegungsphase aufzeigt;
• Fig. 8 eine teilweise Draufsicht veranschaulicht, die stromaufwärts und stromabwärts die zentralen Biegezapfen und die zwei äußeren Biegestangen mit kreisbogenförmigen Einschnitten geeigneten Ausmaßes zum Aufnehmen der Biegerundeisen, die rundförmig und auf der gesamten Oberfläche durchgehend ausgebildet sind, aufzeigt.

Four solutions according to the present invention are shown by way of example, in a preferred manner but without limitation, with reference to the accompanying four drawings, in which:

• Fig. 1 Fig. 10 is a side view of a wire-mesh wire cage of complex shape for construction;
• Fig. 2 a front view of a three-dimensional cage from the preceding figure, wherein the juxtaposed juxtaposition of the curved longitudinal bars is highlighted;
• Fig. 3 a plan view of the pivotally controlled two-axis automatic bending machine illustrated, which is pivotally anchored in the center line and of a Actuator is actuated. The machine is linear and orthogonal to the feed direction of the electro-welded braid;
• Fig. 4 shows a partial front view of the group of central main flexure pivots mounted on a suitable carriage which is automatically and accurately controlled by suitable actuator means;
• Fig. 5 is a side view of a main bending pin, wherein the three formed on the underside of the bending tooth semi-circular grooves are highlighted;
• Fig. 6 Figure 4 illustrates a side view of the bending assembly, highlighting the flexure rods mounted on arms upstream and downstream of the central main pivot;
• Fig. 7 Fig. 12 is a partial plan view showing, upstream and downstream, the central flexure pins and the two flexure rods with special tapered bushings for deflecting the longitudinal straps of the braid during the flexing phase;
• Fig. 8 Fig. 2 illustrates a partial plan view illustrating, upstream and downstream, the central flexure pivots and the two outer flexure bars with circular arcuate cuts of appropriate extent for receiving the bend rounds which are circular and continuous throughout the surface.

As can be seen from the accompanying drawings, one engages for the automatic production of three-dimensional cages for the construction, which one creates from simple electro-welded wire mesh (1) - be it prefabricated or simply by means of suitable equipment directly and continuously produced type, which also as The subject of the present invention in-line bending machine (3) - to appropriate technical measures to eliminate the disadvantages, if the product has a particularly complex shape. The complex shape of a reticulated cage for building is given when it provides for the formation of a product with continuously bending and successive multilayers, whose inner layer has a geometric shape that is the same as that of the outer layer (or another Owns shape). The electro-welded wire mesh (1) usually has orthogonally arranged meshes, i. H. transverse metal round iron elements (1.2) and longitudinal metal round iron elements (1.1).

In order to reduce the space required of the inner layer in relation to the outer layer during the phase of the automatic production of the cage, three technical solutions are shown to eliminate the deformations of the bends, which are due to the superposition of the longitudinal bars during the bending phase in products with complex shape , As already stated above, it is necessary to line up the longitudinal bars during the successive bending phases to the first outer layer in order to achieve these goals to reach.

The first technical solution to overcoming the above drawbacks is to articulate the two-sided bending machine (3) at a point on the ground possibly located in the center line (2) and to make a slight angular displacement of the machine with respect to their orthogonality in the feed direction of the braid to be bent by means of a suitable automatic hydraulic actuator (8). This angular displacement of the axis (7) of the machine takes place alternately in both directions, so that the production of a product in a spiral manner is prevented.

The second technical solution, which is equivalent to the first one, consists in the special manufacture of the central main bending pins (10) which are automatically actuated on a suitable carriage box (4) which is movable and by suitable control means (9) or other appropriate means is appropriate. These actuators are located at the ends and act on the entire plurality of main pins (10), which are set in motion by control, if it is necessary to deflect the longitudinal bars (1.1) during the bending phase of an overlapping side. This shift must be made during the actual initial bending phase so that the slight lateral shift of the affected bends is favored. A displacement corresponding to the diameter of the above round iron is sufficient. For better operation, the bending pins (10) have a C-shaped profile, the upper portion is externally shaped and rounded and has a circular arc incision (11) according to the direction of the longitudinal iron on the inside of the coupling of the longitudinal track, while the remaining portion This pin has three small grooves with semicircular profile (12) in the orthogonal direction to the previous incision on the bottom.

The third technical solution, which is also equivalent to those mentioned above, consists in equipping the upstream (5) and downstream (6) bending rods automatically set in motion by suitable arms which are symmetrical to the central main pins (10). lie, with special socket elements (13) having the conical processing (14) near the passage region of the longitudinal round bars to be bent. Once the braid to be bent is grasped, with the longitudinal bars (1.1) being clamped orthogonal to the central main pins (10), the bending bar will in fact have a plurality of conical elements (13) corresponding to the number of longitudinal bars to be bent, actuated. The round bars (1.1) exposed to the radial bending force with respect to the central pins are deflected onto the larger radius tapered surfaces (14) with respect to the main bending point (10). In this way, a bending of the braid with slight lateral displacement of the longitudinal bars is generated, so that it to those of previous layer can be queued.

The fourth technical solution, which is equivalent to those mentioned above, is similar to the third solution, the modification being that the bending rods have semi-circular cuts (15) or circular-arc cuts (suitable for receiving the longitudinal rods to be bent). have, which are distributed annularly over the entire length. In this case, both the rods (5) and (6) and the central pins (10) provide the use of actuators (9) which are responsible for transversely controlling them during the bending phases of the wire mesh.

In order to achieve the same objectives, the proposed solutions can rightly be applied individually and / or in various combinations.

The invention is, of course, not limited to the embodiments described above, on the basis of which other embodiments and types are possible, the execution details in any case may vary without departing from the scope of the invention as set forth and claimed hereinafter.

Claims (9)

A bending machine for self-caged cages made of electro-welded wire meshes, the line of curvature being inclined slightly on the orthogonal line of the feed direction, and equivalent technical solutions, characterized in that the line bender (3) of two-headed type used in suitable installations for the production of reticulated cages and / or three-dimensional net-like structures for construction with complex geometric shape (multilayer) or simply used individually, occupies a position which is orthogonal to the feed direction of the electro-welded wire mesh (1) to be bent, and on the ground or hinged to another supporting structure to be able to be aligned by one or more actuator means (8) by automatic control, when a bend which is in superposition with a bend which has already been made previously is taken. The bending machine is alternately aligned angularly in both directions by a small angular extent sufficient to juxtapose the longitudinal bars (1.1) of the braid (1) during the bending phase. A reticulated cage bending machine according to claim 1, characterized in that it is pivotally anchored to the ground or other support surface according to a vertical axis, possibly in the center line (2) with respect to the direction and the work surface, by the angle of the deflection angle reduce the entire machine. A reticulated cage machine according to claim 1, characterized in that it is fixedly mounted on the ground or on suitable supporting surfaces and has central bending pins (10) for solving the problems associated with the superimposed bends in the manufacture of complex cages mounted on a suitable movable carriage box (4) which is orthogonal to the advancing direction of the wire mesh and at least actuated by a high-precision actuator device on the end capable of performing a controlled displacement of all the pins simultaneously. The displacement of the main pegs occurs at the initial moment of the flexing phase, thereby changing the final bend path, juxtaposing the longitudinal bars (1.1) of two successive curved bends. A bending machine for reticulated cages according to claim 3, characterized in that the central main bending pins (10) mounted on a carriage box (4) are C-shaped, oriented orthogonal to the direction of advance of the wire mesh and the longitudinal bars (1.1) to be bent, the pins on the upper outer side being specially shaped and rounded, and on the underside of the bending portion have a circular arc-shaped recess (11) in the orthogonal direction with respect to the pin, while the remaining end has slightly formed circular arc-shaped continuous longitudinal grooves (12). A reticulated cage bending machine according to claim 1, characterized in that it is capable of carrying out the successive bending in superimposed cages of complex shape by juxtaposition of the longitudinal bending bars (1.1) with bending bars upstream and downstream of the central main bending pins and in the direction of passage of the longitudinal track of the bending braid lying particular conical bushings (13), wherein they have a bending outer surface which varies from a larger outer diameter to a smaller tapered end diameter. The round bars (1.1) to be bent are initially in contact with the conical surface (with a larger diameter) while the round bar immediately slides laterally towards the tapered end of the bushing (13) at the beginning of the actual bending phase. This displacement is sufficient to deflect the bent bar iron and to line it up with that which was previously bent normally without transverse displacement of the bar. A reticulated bending machine for reticulated cages according to claim 5, characterized in that the bending bars upstream (5) and downstream (6) of the central pins (10) consist of an order and in the correct position with respect to the properties of the one being processed Wire meshes - positioned by suitable cylindrical bushes and / or tapered bushings (13) (in both directions) and / or annular cuts having semicircular or circular arcuate cross-section, which are consecutively strung together, or of the bars themselves, processed in such a way are. A net cage retractor according to claims 5 and 6, characterized in that it uses steeply threaded rods (15), whether in a self-rotatingly controlled manner, as external bending rods (5) and (6) by suitable means. A reticulation machine for reticulated cages according to claims 5, 6 and 7, characterized characterized in that the upstream and downstream outer bending bars are automatically controlled in their transverse movements (with respect to the advancing direction of the mesh) by suitable actuator means during the bending phases or on their own rotation in the case of thread-like bars (5) and (6). A reticulation machine for reticulated cages according to one or more of the preceding claims, characterized in that they are produced by using one or more of the proposed solutions and / or different combinations thereof.

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