EP1075339A1

EP1075339A1 - Method and installation for producing grid mats

Info

Publication number: EP1075339A1
Application number: EP00904674A
Authority: EP
Inventors: Klaus Ritter; Gerhard Ritter; Gerhard Schmidt
Original assignee: EVG Entwicklungs und Verwertungs GmbH
Current assignee: EVG Entwicklungs und Verwertungs GmbH
Priority date: 1999-03-02
Filing date: 2000-02-14
Publication date: 2001-02-14
Anticipated expiration: 2020-02-14
Also published as: ATA35099A; DE50002151D1; AT408196B; EP1075339B1; ATE240173T1; WO2000051760A1

Abstract

The invention relates to a method and installation for producing grid mats comprised of longitudinal and transversal rods (L, Q) which are welded to one another at crossing points. According to the invention, material billets made of hot-rolled material and serving to form the longitudinal and transversal rods are continuously drawn from each wire supply (1, 10), and in order to improve the mechanical-technological properties thereof, are stretched (27), subsequently temper rolled (30) and cut into lengths (3), whereupon the longitudinal rods (L) are introduced in a group by group manner into the grid welding machine (9) and are welded therein to transversal rods (Q). The material billets for forming the transversal rods (Q) are fed at a lower speed than that of the material billets for forming the longitudinal rods (L). The longitudinal and transversal rods are produced from material billets which run in a preferably parallel manner with regard to the direction (P1) of production, whereby all material billets used to form the transversal rods (Q) are turned around an angle of 90 DEG , and the number of material billets used to form the transversal (Q) rods is greater than that for the longitudinal rods (L).

Description

Process and plant for the production of mesh mats

The invention relates to a method and a system for producing lattice mats from longitudinal and cross bars of hot-rolled material which cross each other and are welded to one another at the crossing points, the material strands used to form the longitudinal and cross bars being continuously drawn from a wire supply, in this case for improvement their mechanical-technological properties are stretched, then trained and cut to length, whereupon the longitudinal bars are introduced into the grid welding machine in groups and welded to the cross bars in the latter.

There have already been proposed a method and a system for producing lattice mats, in which the strand of material used to form the longitudinal bars is continuously drawn off from a wire supply via a spill and stretched to improve its mechanical-technological properties, and then dressed and cut to length. The longitudinal bars are then arranged in groups and according to the longitudinal bar division in the mesh to be produced, snapped into the area of effect of the gas welding machine and inserted into it. The strand of material used to form the crossbars is first continuously withdrawn from a wire supply via a spill, stretched to improve its mechanical-technological properties and then guided and trained via a buffer store. Finally, the cross bar, which is separated from the material strand, is fed to the grid welding machine in the welding cycle and welded there to the longitudinal bar family. A disadvantage of this method and of this system is that the longitudinal bars are arranged in groups immediately after separation from the material strand in accordance with the desired longitudinal wire division, as a result of which all downstream devices for further transport and for transferring the longitudinal bar family must have exact positioning accuracy. It is not possible to correct any positioning or transfer errors.

The object of the invention is to avoid the disadvantages described and a method and an installation of the introduction Specified type that allow hot rolled material, the mechanical-technological properties of which are improved, to be processed at high production speed into wire mesh, the longitudinal and transverse bars being fed to the wire mesh welding system as cut bars. Due to the structure of the grid welding machine, in particular the handling of the longitudinal and cross bars in the grid welding machine, higher demands are made on the straightness of the cross bars than on the straightness of the longitudinal bars. The invention is also intended to make it possible, without reducing the production speed, to produce lattice mats which have different longitudinal rod and / or transverse rod diameters within a lattice mat.

The process according to the invention is characterized in that the material strands for forming the cross bars are fed at a lower speed than the material strands for forming the longitudinal bars and that the longitudinal and cross bars are produced from material strands preferably running parallel to the production direction, with all material strands for the cross bars 90 ° are deflected and the number of material strands for the cross bars is greater than that for the longitudinal bars.

According to a further feature of the invention, the cut-to-length longitudinal bars with their ends facing the grid welding machine are aligned in a line parallel to the welding line of the grid welding machine and first a horizontal distribution plane which is different from the horizontal longitudinal bar feed plane defined by the welding line of the grid welding machine and the longitudinal bar group is fed in and in This distribution plane is distributed transversely, whereupon the longitudinal rods are then brought in groups from this distribution plane into the longitudinal rod feed plane and finally inserted in groups into the grid welding machine.

In the context of the invention, the continuously drawn material strands are preferably conveyed into a buffer store for producing the longitudinal and transverse bars, and the longitudinal and transverse bars are separated discontinuously. A system for carrying out the method, each with a discharge device for the wire supply, a stretching device, a feed device, a straightening device and a cutting device for producing the longitudinal bars and the transverse bars, with a distribution device and a transfer device for the longitudinal bars, as well as with a grid welding machine For welding the longitudinal bar coulter to the transverse bars, the invention is characterized in that each material strand for the longitudinal and transverse bars, viewed in the flow direction, is assigned successively at least one drainage direction, a dressage device with inlet guide nozzles, a threading device, a stretching device, a feed device, a straightening device and a cutting device and that each lengthened longitudinal rod is arranged in at least one outlet channel arranged laterally parallel to the longitudinal rod feed plane with at least one longitudinal rod track and at least two rod guide channels eal per track is conveyable, whereby for aligning the ends of the longitudinal bars facing the grid welding machine at a stop running parallel to the welding line, a conveying device is provided with which the longitudinal bars can be conveyed cyclically into a transverse distribution device for transverse distribution of the longitudinal bars in the distribution plane.

The straightening devices for the longitudinal wires preferably have a plurality of straightening rollers which are arranged offset from one another in two rows and can be adjusted individually and / or electronically in accordance with the diameter and the mechanical-technological properties of the longitudinal wires.

According to a development of the invention, it is provided that the transverse distribution device has at least two endless double circulation chains, each of which is provided with two partial chains which can be driven independently of one another and contain a plurality of driving jaws, the driving jaws of one partial chain having the driving jaws of the other partial chain for clamping the longitudinal bars interact in the distribution plane like a pliers, and that for throwing off the longitudinal rods from the distribution plane into the longitudinal rod feed plane, the driver jaws are evident through relative movements of the two partial chains. In the context of the invention, a further development of the system is characterized in that the transfer device has a plurality of lifting beams which run transversely to the production direction and are uniformly distributed over the longitudinal rod feed plane, all lifting beams being movable together in the transverse direction and in the longitudinal direction, and being liftable and lowerable, and each Walking beam is provided with several rollers lying in the longitudinal bar feed plane.

Further features and advantages of the invention are explained in more detail below using exemplary embodiments with reference to the drawings. Show it:

La is a schematic plan view of a system according to the invention,

1b shows a further exemplary embodiment of a drain device for the longitudinal bars,

2 shows a schematic plan view of a further exemplary embodiment of a system according to the invention,

3 shows a schematic plan view of a further exemplary embodiment of a system according to the invention, FIG. 4 shows a schematic plan view of a further embodiment of a system according to the invention,

5a is a schematic plan view of a distribution device and a transfer device for the longitudinal bars,

5b shows a further exemplary embodiment for a transfer device,

6a is a schematic side view of a feed device, a screw conveyor, a distribution device and a transfer device for the longitudinal bars,

6b and 6c are schematic side views of the two partial chains of the distribution device according to FIG. 6a,

7 shows a schematic side view of a further exemplary embodiment of a distribution device for the longitudinal bars,

8 shows a schematic side view of a further exemplary embodiment of a distribution device and a transfer device for the longitudinal bars,

Fig. 9 is a schematic side view of another embodiment of a distribution device for the longitudinal bars, and 10 shows a schematic side view of a further exemplary embodiment of a distribution device for the longitudinal bar.

The plant shown in FIGS. 1 a to 4 is used to produce lattice mats from longitudinal bars L and transverse bars Q which are crossed and welded to one another at the crossing points, the longitudinal and transverse bars Q, L being made of hot-rolled material and preferably having a ribbed surface. The grid mats can have different lengths and also have different wire diameters within a grid mat. In the context of the invention, hot-rolled material is understood to mean all steel torments which are produced by rolling out billets on high-speed wire mills with finished blocks, the wire being cooled normally on the customary m-rings and then finally collected into bundles. Without restricting the invention, a continuous strand of material is referred to as a longitudinal or transverse wire for better distinction, while the longitudinal and transverse elements separated from the material strand are referred to as the longitudinal or transverse rod

The exemplary embodiment shown in FIG. 1 a of a system according to the invention has a two-wire unwinding device 1 for the long wires L1, L2, the unwinding device 1 being designed for two long wires, a two-wire deforming device 2 for the long wires, a two-wire cutting device. device 3 for separating the longitudinal rod L from the respective longitudinal wires L1, L2, and a feed and distribution device 4 for transverse distribution of the longitudinal rod L. The longitudinal bars, which are distributed with the aid of the feed and distribution device 4 in accordance with the longitudinal bar division m of the lattice mat to be produced, lie in a horizontally running distribution plane VV (FIGS. 6a, 7, 8, 9, 10), which are defined by the outermost longitudinal bar L 'is limited. The devices 1, 2, 3 and 4 listed above are located on one side of the production plant. In the context of the invention, it is possible, as shown in dash-dot lines in Fig. La, to arrange the same devices on the other side of the production system. The corresponding friction lines are designated in Fig. La and in the following Figures 2, 3 and 4 with 1 ', 2', 3 'and 4'.

The system also has two two-wire discharge devices 5 for the cross wires Q1, Q2 or Q3, Q4, a four-wire shaping device 6 for the cross wires, a cutting device 7 for separating the cross bars Q from the respective cross wires Q1, Q2, Q3, Q4, and a distribution and feed device 8 for distributing and feeding the cross bars Q into a grid welding machine 9. The mesh welding machine 9 works according to the resistance welding method and has a welding line W, which is only indicated schematically and runs horizontally and perpendicular to the production direction Pl, in which the cross bars Q are welded to the longitudinal bars L to form mesh mats. The longitudinal bars fed to the grid welding machine 9 and the welding line W lie in a horizontal plane Z-Z (FIGS. 6a, 7, 8, 9, 10), the so-called longitudinal bar feed plane. The grid welding machine 9 can work according to the invention according to the single-point or the double-spot welding method. The drainage devices 1, 1 'for the longitudinal wires can have different structures within the scope of the invention, as shown in FIG. The drainage devices 1, 1 'can consist of a tangential take-off device 10 which essentially has two turntables 11, 11' which can be driven in accordance with the directions of the double arrow P2 and associated guide rollers 12 and 12 '. The longitudinal wires L1, L2 are drawn off tangentially from the turntables 11, 11 'by the downstream deformation device 2 in accordance with the arrow P3. The use of two turntables is always necessary when a high production speed of the system is required or when different wire diameters within a mesh type are required. Within the scope of the invention, more than two turntables can also be present to further increase production or reduce changeover times.

The drainage devices 1, 1 'can also consist of an overhead take-off device 13 which essentially can be driven in accordance with the directions of the double arrow P2' Turntable 14, 14 'each with a mandrel 15 for receiving the wire supply H (Fig. Lb). In the context of the invention, the wire supply H can consist of a wire reel or wire coil. The longitudinal wires L1 ', L2' are pulled off from the downstream shaping device 2 according to the arrow P3 through a guide funnel 16 and via a lower guide roller (not shown) according to the arrow P3 'overhead. For loading the turntables 14, 14 ', the guide funnel 16 can be pivoted away and a working platform 17 is provided. Within the scope of the invention, more than two turntables can also be present in this exemplary embodiment to further increase production or shorten changeover times.

1b shows a further exemplary embodiment of a drain device 1 in the form of an overhead take-off device 18. On a base frame 19 there are two freely rotatable receiving plates 20, 20 ', each with a mandrel. 15 arranged, wherein the receiving plate for loading with the wire supply H from the drain position 20 into the receiving position 20 'are pivotable. A drainage tower 21 is also arranged on the base frame 19 and has a deflection roller 22 which can be lowered in a guide 23 for threading the wire. The longitudinal wires are pulled off from the downstream deformation device 2 according to arrow P3 according to arrow P3 via a guide roller 24. Within the scope of the invention it is possible to provide the overhead take-off device 18 with one or two line wire cores. Within the scope of the invention, more than two mounting plates can also be present in this exemplary embodiment in order to further increase production or shorten changeover times. The deformation devices 2, 2 'for the longitudinal wires L1, L2 or Ll', L2 'are of identical construction and can be arranged in the direction P3, P3' and in the opposite direction within the scope of the invention. Each deformation device 2, 2 'has, in the flow direction P3, P3', one after the other a dressage device 25, 25 'with inlet guide nozzles, one threading device 26, 26', one stretching device 27, 27 ', one feed device 28, 28' , a drawing agent coating device 29, 29 'and a straightening device 30, 30' each, on which in all devices, as shown in Fig. La, are designed for two line wires. Within the scope of the invention, however, it is also possible to design all the devices 25 to 30, 25 'to 30' and the cutting device 3, 3 'for only one line wire or for more than two ^{' line} wires.

The dressage devices 25, 25 'have the task of straightening the longitudinal wires coming from the drain devices 1, 1' and essentially consists of two rows of straightening rollers which are arranged offset from one another. When straightening the longitudinal wires, they are descaled at the same time. The threading devices 26, 26 'push the longitudinal wires into the downstream stretching devices 27, 27' and facilitates the threading of the longitudinal wires into the stretching devices 27, 27 'during the initial loading. The feed devices 26, 26 'also serve to empty the deformation devices 2, 2' after the line wire supply has run out. Each threading device 26, 26 'essentially consists of a pair of driven feed wheels.

Each stretching device 27, 27 'has a horizontal partial stretching device and a vertical partial stretching device. Both Teilreckeinrj r.htυngen each consist of two rows of several, staggered bending corner rollers, the bending corner rollers can be adjusted individually and / or in rows to each other. The plane defined by the axes of the bending corner rollers of the horizontal partial stretching device is perpendicular to the plane defined by the bending corner rollers of the vertical partial stretching device. The diameter and the number of bending rolls per row can be selected according to the diameter, the mechanical-technological properties and the chemical composition of the wire material to be processed. The bending corner rolls are fed in until the desired degree of stretching of preferably 2 to 6%, ie a cross-sectional reduction of 2 to 6% in the longitudinal wires is achieved. This stretching improves the mechanical-technological properties of the longitudinal wires, the tensile strength remaining approximately the same or increasing only slightly, the yield strength and the uniform elongation increasing considerably, and the ratio of tensile strength to Yield point lowers. The ductility of the longitudinal wires is considerably increased by the stretching. The longitudinal wires can be processed more easily due to the high achievable uniformity of their properties and their low residual stress after stretching. The longitudinal fibers in the stretching devices 27, 27 'stretching the longitudinal wires by at least 3% also adequately descaled the longitudinal wires. In the context of the invention, other stretching methods can also be used which are suitable for reproducibly achieving the desired degree of stretching in the line wire and the required improvement in the mechanical-technological properties of the line wire. Within the scope of the invention it is possible to provide only the vertical partial stretching device. The feed devices 28, 28 'continuously pull the longitudinal wires L1, L2 or Ll', L2 'from the wire supply H in the outlet devices 1, 1' via the dressage devices 25, 25 'and over the stretching devices 27, 27' and push the longitudinal wires in the subsequent coating devices 29, 29 'the straightening devices 30, 3.0' and the cutting devices 3, 3 '. Each feed ") ni r-ht-πng 28. 28 'preferably consists of two pairs of drivable feed rollers, one feed roller being additionally designed as a measuring wheel. For smaller feed powers, only a pair of driven feed rollers can be used within the scope of the invention.

In order to facilitate the run-off of the longitudinal wires, the run-off in the feed and distribution devices 4, 4 'and the further processing of the longitudinal wires in the grid welding machine 9, a preferably liquid drawing agent is applied to the surface of all sides with the aid of the drawing agent coating devices 29, 29' Line wires applied.

Each straightening device 30, 30 'consists of a vertical dressage and a horizontal dressage, each consisting of two rows of a plurality of straightening rollers arranged offset from one another, the straightening rollers being adjustable individually and / or in rows relative to one another. In order to ensure the required high production speed, the straightening rollers are according to the diameter and the mechanical-technological Properties of the longitudinal wires electronically adjustable and controllable. The diameter and the number of straightening rollers per row are adapted to the diameter and the mechanical-technological properties of the longitudinal wires. The straightening rollers are only advanced until the longitudinal wires are straightened, but care must be taken to ensure that the mechanical-technological properties of the longitudinal wires achieved in the stretching devices 27, 27 'are not undesirably changed. The cutting devices 3, 3 'for the longitudinal wires L1, L2 or Ll', L2 'are of identical construction and can be arranged in the direction of P3, P3' and in the opposite direction within the scope of the invention. Each cutting device 3, 3 'is designed as flying scissors and has two interacting knives, by means of which selectable lengths are cut from the endless longitudinal wires L1, L2 or Ll', L2 'to form the required longitudinal rods L without loss of speed.

The longitudinal bars L are then conveyed according to the direction of the arrow P4, P4 parallel to the production direction P1 of the lattice welding machine 9 into an outlet channel 31, 31 ', which also has two tracks S1, S2' according to the two longitudinal wire cores L1, L2 and Ll ', L2' (Fig 5a) in order to be able to accommodate two longitudinal bars at the same time. Each track S1 or S2 has a rod guide channel 32 (FIG. 6a) for the longitudinal rod to be ejected after being cut from the material strand and a rod guide channel 32 '(FIG. 6a) for the longitudinal wire that has not yet been separated, i.e. after the cut, the separated longitudinal rods are alternately ejected into the two rod guide channels 32, 32 '. If the diameter changes frequently within a mesh mat type to be produced, it can be advantageous to provide more than two tracks. Within the scope of the invention, two separate outlet channels with two or more tracks can also be provided. Each outlet channel 31, 31 'is provided with a device, not shown, for braking the longitudinal bars L.

As described in more detail in FIGS. 5a, 5b, 6a, 7, 8, 9 and 10, the longitudinal bars L are fed through the feed and distribution device 4, 4 'according to the arrow directions P5, P5' distributed transversely in the distribution plane VV, brought together into the longitudinal bar feed plane ZZ, transferred to a roller feed device 33 and fed from the roller feed device 33 to the grid welding machine 9. The drainage devices 5 for the transverse wires Q1, Q2, Q3, Q4 can be designed within the scope of the invention in accordance with the exemplary embodiments for the longitudinal wires.

The shaping device 6 for the transverse wires, viewed in the feed direction P6, has a dressage device 34 with inlet guide nozzles, an insertion drive device 35, a stretching device 36, a feed device 37 and a drawing agent coating device 38, all devices within the scope of the invention, as in FIG Fig. La shown, are designed for four cross-wire cores Ql, Q2, Q3, Q4. Since the cross bars Q must have the same mechanical and technological properties as the longitudinal bars L, the individual elements of the deformation device 6 are constructed analogously to the corresponding elements of the deformation devices 2 for the longitudinal wires; i.e. The structure of the dressage device 34 corresponds to that of the dressage device 25, the threading device 3 corresponds to the threading device 26, the stretching device 36 corresponds to the stretching device 27, the feed device 37 corresponds to the feed device 28, the drive power being increased accordingly for the cross wires because of the four-wire embodiment must, and the drawing agent coating device 38 corresponds to the coating device 29.

The cross wires Q1, Q2, Q3, Q4 are deflected by 90 ° in a four-wire deflection arc 39, which consists of several deflection rollers 40 arranged in a circular arc, and are fed to a feed and straightening device 41 according to the direction of the arrow P7 a feed part and a straightening part. The feed section consists of a pair of drivable feed rollers and the downstream straightening section consists of a high-speed straightening rotor. The straightening rotor has a better straightening quality than a straightening device constructed from straightening rollers, so that the straightness of the cross bars Q is better than the straightness of the longitudinal rods straightened by straightening rollers. rod L. However, since the straightening rotors have a lower production speed than the roller straighteners, more material strands have to be provided for the production of the transverse rod than for the production of the longitudinal rod. In Fig. La, the crossbar Q are therefore generated by four cross-wire cores Ql, Q2, Q3, Q4, while either the two longitudinal wire cores L1, L2 or the two longitudinal wire cores Ll ', L2' m are used to produce the longitudinal rod L. Due to the slower straightening speed of the straightening rotor, more and more wires must be available to generate the crossbar than are required to generate the longitudinal bar. Within the scope of the invention, it is therefore also possible to provide only three or more than four transverse wire cores in the case of two line wire cores. If there is only one long wire (Fig. 3 and 4), at least two cross wire must be available.

The cutting device 7 connected downstream of the feed and straightening device 41 is designed as flying scissors 42 and each wire has two interacting knives, with the aid of which selectable lengths are cut from the endless cross wires Q1, Q2, Q3, Q4 to form the required crossbar Q. The crossbar Q then arrives at the distribution and feeding device 8 and is fed by the welding lime W to the lattice welding machine 9 in accordance with the direction of the arrow P8. Within the scope of the invention, the distributing and feeding device 8 can be arranged above and / or below the longitudinal rod feed plane Z-Z, so that the transverse rod above and / or below the longitudinal wire coulter can be welded to it.

FIG. 2 shows a further exemplary embodiment, in which the generation of the crossbar Q and its supply in the lattice welding machine 9 corresponds to the exemplary embodiment in FIG. To produce the grid mat, either only the longitudinal wire cores Ll, L2 or only the longitudinal wire cores Ll ', L2' or the longitudinal wire cores Ll, L2 and Ll ', L2' are alternately set. Pulling off the long wires Ll, L2; L1 ', L2' of the trigger devices 1, 1 ', which are designed, for example, as a tangential trigger device 10, 10', and the like Advancing and stretching the longitudinal wires corresponds to the embodiment shown in Fig. La.

The longitudinal wires L1, L2 are pushed after the drawing agent coating device 29 into a deflection device 43, which in the context of the invention can consist, for example, of a rotatable disk with a large radius or also of a deflection bend, and the longitudinal wires L1, L2 by 180 ° deflects. The disk can be designed to be drivable within the scope of the invention. The deflection bend is provided in the same way as the deflection bend 39 for the transverse wires with a plurality of deflection rollers arranged in a circular bend.

After the deflection device 43, the longitudinal wires L1, L2 are fed to a feed and straightening device 44, which consists of a feed part and a straightening part, the straightening part being constructed analogously to the straightening device 30 (FIG. 1 a). The feed part pushes the longitudinal wires L1, L2 into a downstream cutting device 45, which is designed as flying scissors and with the help of which lengths which can be selected from the endless longitudinal wires L1, L2 to form the required longitudinal rods L are cut off without loss of speed. The separated longstems be T ^, are then conveyed into the downstream outlet channel 31 in the direction of the arrow P9 opposite to the production direction P1 of the grid welding machine 9. The longitudinal wires L1 ', L2' are advanced after the drawing agent coating device 29 'into a loop memory 46, in which the longitudinal wires L1', L2 'are deflected by 180 ° in correspondingly designed and arranged guides. The longitudinal wire loops LS formed in the loop memory 46 move in the guides of the loop memory 46 in accordance with the directions of the double arrow P10. After the loop memory 46, the longitudinal wires L1 ', L2' are fed to a weft device 47. The insertion device 47 has a feed part and a straightening part. The feed part has a pair of bullet wheels, one bullet wheel being driven, while the other bullet wheel is designed as a measuring wheel. The straightening section essentially has a vertical and a horizontal dressage and is analogous to the direction device 30 (Fig. La) built. The feed part pushes the longitudinal wires L1 ', L2' intermittently into a downstream cutting device 48, which is designed as a standing pair of scissors and with the help of which lengths of the endless longitudinal wires L1 ', L2' are cut to form the required longitudinal rods L. In this embodiment, the devices 25 ', 26', 27 ', 28', 29 ', 30', 31 ', 47 and 48 are arranged so close together that these devices can be combined into a compact, space-saving unit. This also has the advantage that the inevitable large noise development at the required high production speeds can be reduced with less effort. The longitudinal wire loops LS in the loop memory 46, which are variable in size, coordinate the continuous removal of the longitudinal wires L1 ', L2' by the feed device 28 'with the intermittent severing of the longitudinal bars by the stationary cutting device 48. The separated longitudinal bars L are then conveyed into the downstream outlet channel 31 'in the direction of the arrow P9' opposite to the production direction P1 of the lattice welding machine 9.

Within the scope of the invention, it is possible to provide the line wires L1 ', L2' with the devices 43, 44, 45 or to operate the line wire wires L1, L2 with the devices 46, 47, 48.

FIG. 3 shows a further exemplary embodiment, in which the generation of the longitudinal bars L and their feeding into the outlet channel 31 'corresponds in its design to the exemplary embodiment of FIG. La, but with the direction of movement of the longitudinal wires L1', L2 'in one direction of production Pl of the lattice welding machine 9 takes place in the opposite direction of the arrow Pll and the separated longitudinal bars L are conveyed into the downstream outlet channel 31 'in accordance with the arrow direction P9' opposite to the production direction Pl of the lattice welding machine 9. In contrast to the embodiment of FIGS. La and 2, however, only one line wire wire is in operation in the manufacture of the grid mat in this embodiment, while the second wire as a reserve or for changing the Longitudinal bar diameter serves. The longitudinal bars L will be distributed across the entire width of the distribution plane VV by the feed and distribution device 4 'according to the direction of the arrow P5'. The cross-distributed longitudinal bars L, L 'are then brought together into the longitudinal bar feed plane ZZ, transferred to the roller feed device 33 and fed by the latter to the grid welding machine 9.

In this exemplary embodiment, the generation of the stretched transverse wires Q1, Q2 corresponds in principle to the exemplary embodiments according to FIGS. 1 a and 2; only the withdrawal direction of the cross wires Q1, Q2 takes place in accordance with an arrow direction P12 opposite to the production direction P1 of the lattice welding machine 9. The devices 34 ', 35', 36 '37' and 38 'required to produce the stretched transverse wires Q1, Q2 are constructed analogously to the devices 34, 35, 36, 37 and 38 described in FIGS. 1 a and 2 and differ only in that they are only designed for two cross-wire cores.

After the drawing agent coating device 38 ', the transverse wires Q1, Q2 arrive in a loop memory 49, in which the transverse wires Q1, Q2 are deflected by 180 ° in appropriately designed and arranged guides. The cross wire loops QS formed in the loop memory 49 move in the loop memory 49 in accordance with the directions of the double arrow P13. After the loop memory 49, the transverse wires Q1, Q2 are deflected by 90 ° in the deflection curve 39 consisting of deflection rollers 40 and fed to a weft device 50 in the direction of the arrow P7. The insertion device 50 has a feed part, a straightening part and a switch. The feed part and the straightening part are constructed analogously to the feed and straightening device 41 according to FIGS. 1 a and 2. The feed part intermittently pushes the cross wires Q1, Q2 into a downstream one. Cutting device 51, which is designed as a standing pair of scissors and by means of which the selectable lengths are cut from the endless cross wires Q1, Q2 to form the required cross bars Q. The size of the transverse wire loops QS in the loop memory 49, which is controlled in terms of size, means that the transverse wires Q1, Q2 are continuously drawn off by the feed device 37 ' Coordinated by the intermittent intermittent shooting of the transverse wires Q1, Q2 into the standing cutting device 51 by the shot direction 50.

In this exemplary embodiment, the separated crossbars Q are introduced via the switch into a weft line E arranged in the grid welding machine 9 and pass from this line the welding line W. With the help of the switch, crossbars Q1 and crosswire core Q2 are used to alternate crossbars Q in the bullet line E introduced. Within the scope of the invention, the weft line E can be arranged above and / or below the longitudinal bar feed plane Z-Z, so that the transverse bar above and / or below the longitudinal wire sheet can be welded to it. Within the scope of the invention it is possible for the weft line E to be aligned with the welding line W.

FIG. 4 shows a further exemplary embodiment, in which the generation of the crossbar Q m corresponds in its embodiment to the exemplary embodiment in FIG. 3, but the direction of movement of the transverse wires Q1, Q2 takes place in the direction of the arrow P6 parallel to the production direction Pl of the lattice welding machine 9. The severed 3, as described in the exemplary embodiment according to FIG. 3, the welding line W of the lattice welding machine 9 passes over the insertion line E m.

The longitudinal rod L is produced and fed in this exemplary embodiment in the following way:

The long wires L1 ', L2' pass from the drain directions 1 'via the dressage device 25' to the Emfadelem device 26 ', which demands the long wires m a deflection device 52. The deflection device 52 deflects the longitudinal wires by 180 ° and, in the context of the invention, can consist of a rotatable disk with a large radius or of a deflection arch. The stretching device 27 ', the feed device 28', the drawing means coating device 29 'and the straightening device 30' are connected in succession to the deflection device 52. The downstream cutting device 3 'is designed as flying scissors and cuts off the required longitudinal bars L m of selectable lengths from the endless long wires L1', L2 'without loss of speed. The longitudinal letter L are then according to the direction of the arrow P9 'm opposite to the direction of production Pl of the lattice welding machine 9, the outlet channel 31' is required. The longitudinal bars L are distributed across the entire width of the distribution plane VV by the feed and distribution device 4 'in accordance with the direction of the arrow P5', then brought together the longitudinal bar feed plane ZZ, transferred to the roller feed device 33 and fed by the latter to the grid welding machine 9. This embodiment has the advantage that it takes up less space than the other embodiments; it is disadvantageous, however, that non-stretched long wires have to be deflected so that the

Redirection of the long wires requires more effort.

The feed and distribution device shown in FIG. 5a

4 has a base frame 53, shown only schematically, which carries a plurality of conveying devices 54 for the longitudinal bar, which are distributed in the horizontal direction and are arranged laterally of the longitudinal bar feed plane ZZ. The conveying devices 54 consist of screw conveyors which, as shown in FIG. 6a, are arranged inclined. All Ford screws 54 require the longitudinal rod L together both in accordance with the arrow direction P14 transversely to its longitudinal axis and in the longitudinal direction in accordance with the arrow direction P4 and are synchronized in their movements. The number of conveying devices 54 and their distribution along the longitudinal bars depends on the dimensions, especially the maximum length and the minimum diameter of the longitudinal bar to be requested, since it must be ensured that the longitudinal bar without slip and without undue sag both as quickly as possible Directions P4 and P14 are required. In order to also be able to demand short longitudinal bars, the distances between the conveying devices 54 in the area adjacent to the lattice welding machine 9 are chosen to be smaller than in the remaining area. Above each auger 54, two guide plates 55 are arranged in order to prevent the longitudinal rod to be demanded from jumping out of the augers 54. The longitudinal rod L is brought from the rod guide channels 32, 32 'of the outlet channel 31 m from a feed device 56 (FIG. 6a) to the Ford screws 54. The demand in the longitudinal direction corresponding to the arrow direction P4 continues until the butt the front ends of the longitudinal bars L against a stop 57, which is attached to the base frame 53 and runs parallel to the welding line W and is aligned with the end of the outlet channel 31, and thus the front ends of all the longitudinal bars are aligned in a line parallel to the welding line W. The conveyance of the longitudinal bars in the transverse direction P14 is described in Fig. 6a.

The longitudinal bars L are brought from the screw conveyors 54 into the working area of a transverse distribution device 58 arranged above the longitudinal bar feed plane ZZ. The transverse distributing device 58 has the task of distributing the longitudinal bars according to the direction of the arrow P5 across the entire width of the distributing plane VV and has a plurality of endless double circulating chains 59, each of which is guided by a drive roller 60 and a deflection roller 61. All double circulation chains 59 are driven synchronously in order to be able to jointly distribute a longitudinal bar transversely. The ^'double circulation chains 59 are aligned with the feed screws 54, except for the more densely occupied with screw conveyors 54 region close to the grid welding machine. 9

Within the scope of the invention, as shown in the exemplary embodiments according to FIGS. 1 a and 2, it is possible to provide one feed and distribution device 4, 4 ′ on each side of the longitudinal bar feed plane ZZ, only one feed in each case when producing a mesh mat - And distribution device 4 is in operation and the other feed and distribution device 4 'is in the waiting position.

A frame 62 is arranged below the double circulation chains 59 and carries a plurality of transport rollers 63 which are evenly distributed over the longitudinal bar feed plane ZZ and which laterally protrude beyond the outermost longitudinal bars L '. At the end of the feed and distribution device 4 facing the grid welding machine 9, a transfer device 64 is arranged, which has the task of taking over the longitudinal bar, which is distributed in the distribution plane VV and brought into the longitudinal bar feed plane ZZ, and of the roll feed device 33 of the grid welding machine 9 to hand over. The transfer device 64 can be moved in accordance with the directions of the double arrow P15 and has a plurality of threading pliers 65. The threading pliers 65 are corresponding the required longitudinal bar division can be positioned transversely to the production direction Pl in the lattice mat to be produced. The maximum number of threading tongs 65 corresponds to the maximum number of longitudinal bars that can be welded in the grid welding machine 9. The roller feed device 33 has a plurality of pairs of feed rollers 66 which, like the threading pliers 65, can be positioned transversely to the production direction P1 in accordance with the required longitudinal rod division in the lattice mat to be produced. The maximum number of pairs of feed rollers 66 corresponds to the maximum number of longitudinal bars that can be welded in the grid welding machine 9.

Within the scope of the invention, it is possible, as shown in FIG. 5b, to design the roller feed device 33 to be displaceable in accordance with the directions of the double arrow P16. The roller feed device 33 can therefore take over the task of the transfer device 64, so that the transfer device 64 is completely eliminated in this exemplary embodiment.

As shown schematically in FIG. 6a, the longitudinal rods L located in the rod guide channels 32 or 32 'are released by pivoting away a flap 67 or 67' which can be pivoted in accordance with the directions of the double arrows Pl 7 or P] 7 'and enter one inclined feed channel 68 or 68 '. The feed channels 68, 68 'are closed at their lower ends with a locking pin 69 and 69', respectively. The locking pins 69, 69 'are moved with the aid of a working cylinder 70 or 70' in accordance with the directions of the double arrow P18 or P18 'and give the feed channels 68; 68 'alternately free, so that the longitudinal bars L can reach an approximately vertically running intermediate storage 71. The intermediate store 71, just like the feed channels 68, 68 ', is just wide enough that the longitudinal bars are arranged in one layer. In the intermediate store 71, the longitudinal rods L fall down in accordance with the direction of the arrow P19 until they reach the first thread 72 of the screw conveyors 54. Each double circulation chain 59 consists of a partial chain 73

(Fig. 6b) and a partial chain 74 (Fig. 6c). The partial chain 73 can be driven in accordance with the direction of the arrow P20 and has a plurality of driver jaws 75 which are on its right flank a recess 76 are provided. The partial chain 74 can be driven in accordance with the directions of the double arrow P21 and has a plurality of driver jaws 77 which are provided with a recess 76 on their left flank. The driving jaws 75, 77 and the recesses 76 are shaped so that the driving jaws 75, 77 in the horizontal lower region of the double circulation chain 59, which defines the distribution level VV, interact in pairs like pliers by corresponding synchronous control of the partial chains 73, 74 and in the distribution level VV the longitudinal bars can securely clamp. The number of driving jaw pairs 75, 77 formed in this way in the distribution plane VV corresponds at least to the maximum number of longitudinal bars that can be welded in the grid welding machine 9, or the predetermined division of the double circulation chain 59. The double circulation chain 59 can be connected to both partial chains 73 , 74 acting device, for tensioning the partial chains 73, 74.

The cross-distribution device 58 works in the following way: With the deflection movement of the double circulation chain 59 around the drive roller 60, the driving jaws 75, 77 spread out, so that the driving jaw pair 75, 77 opens and the conveyor screw 54 by conveying according to the direction of the arrow P14 a longitudinal rod L between them Driver jaws 75, 77 can insert. The conveyor worm 54 preferably has its outlet, as shown in FIG. 6 a, in the upper deflection area of the drive roller 60 of the double circulation chain 59. In order to prevent the longitudinal bars from falling out in the region of the deflection, the lateral and lower regions of the deflection of the double circulation chains 59 are provided with a appropriately shaped guide contour 78, which surrounds the deflection region in a semicircular shape, is closed. As the double circulation chain 59 moves in the direction of the arrow P20, the pair of driving jaws 75, 77 filled with a longitudinal rod leaves the deflection and reaches the horizontal lower part of the double circulation chain 59, whereby the pair of driving jaws 75, 77 closes like pliers and securely clamps the longitudinal rod. The filling process is repeated until all the longitudinal bars required for the production of the mesh mat in the driver jaw pairs 75, 77 of Double circulation chain 59 are inserted. The longitudinal bar division desired in the grid mat is produced in that only selected pairs of driver jaws 75, 77 are equipped with longitudinal bars by the screw conveyor 54, while the other pairs of driver jaws 75, 77 remain empty. In order to achieve this, the circulating movement P20 of the double circulating chain 59 and the conveying movement P14 of the screw conveyor 54 are coordinated with one another. The orbital movement of the double circulation chain 59 continues after the filling with longitudinal bars until all the longitudinal bars in the distribution plane VV lying above the longitudinal bar feed plane ZZ are cross-distributed and the positions of all the longitudinal bars approximately match the positions predetermined by the required longitudinal bar division in the grid mat.

The threading pliers 65 positioned in the lattice mat to be produced in accordance with the required longitudinal rod division are arranged below the double circulation chain 59 in the longitudinal rod feed plane ZZ and each have a fixed clamping jaw 79 and a movable clamping jaw 81 connected to it by a joint 80. To transfer the longitudinal bars from the double circulation chain 59 into the threading tongs 65, the driver hook pairs 75. 77 of the double circulation chain 59 are opened and fall into the likewise opened jaws 79, 81 of the threading tongs 65. Minor misalignment between the overhead double circulation chain 59 and its driver jaw pairs 75, 77 and the underlying threading pliers 65 are compensated for by the V-shaped funnel position of the threading pliers 65. The driver jaw pairs 75, 77 are opened by brief relative movement of the two partial chains 73 and 74. It is possible within the scope of the invention, when the partial chain 73 is at a standstill, only briefly to close the partial chain 74 in the direction of the double arrow P21 directed against the rotary movement P20 move, or in addition to moving the partial chain 74, also move the partial chain 73 briefly in accordance with the direction of rotation P20 or, when the partial chain 74 is at a standstill, only move the partial chain 73 in accordance with the circumferential movement P20. After the longitudinal bars have been thrown off, the double circulation chain 59 can again be fitted with longitudinal bars for the following grid mat. The movable jaws 81 of the Einfadelzangen 65 are then closed, whereby the longitudinal bar are securely clamped in the E Fadelzangen 65. Finally, the transfer device 64 pushes the longitudinal bar coulter according to the production direction Pl along the longitudinal bar feed plane ZZ m the roller feed device 33 of the lattice welding machine 9, the longitudinal bar being supported on the threading tongs 65 and the transport rollers 63. After the transfer of the longitudinal bar coulter to the roller feed direction 33, the transfer device 64 moves back into its takeover position in order to take over the longitudinal bar of the following mesh mat from the double circulation chain 59. As soon as the ends of the long bar just to be welded in the lattice welding machine 9 have left the roller feed device 33, the transfer device 64 can feed the roll feed device 33 again with long bars for the following lattice mat.

In the exemplary embodiment shown in FIG. 7, the transverse distribution 58 has a plurality of circumferential endless hook chains 82 which are provided with a plurality of hooks 83 and can be driven by the drive roller 60 in the direction of the arrow P22 and are guided over the deflection roller 61. All hook chains 82 are driven synchronously in order to be able to jointly distribute a longitudinal bar transversely. The hook chains 82 are aligned with the Ford screws 54, except for the area near the mesh welding machine 9, which area is more densely populated with conveyor screws 54. Each hook 83 has a recess 84 for receiving a longitudinal rod L, which is designed such that the longitudinal rod is both in the deflection area the drive roller 60 as well as in the lower horizontal part of the hook chain 82, which defines the distribution plane VV and lies above the longitudinal rod feed plane ZZ. The maximum number of hooks 83 m in the distribution plane VV corresponds at least to the maximum number of m of the long bar that can be welded by the grid welding machine 9 or the predetermined division of the hook chain 82. The feeding of the long bar from the bar guide channels 32, 32 ′ of the outlet channel 31 m by means of the augers 54 the feed device 56 takes place as described in the exemplary embodiment according to FIG. 6a. By designing the hook 83 however, the guide contour 78 can be omitted. The feeding of the hook chains 82 with the longitudinal bars L by the Ford screws 54 takes place as described in the exemplary embodiment according to FIG. 6a, the longitudinal bars L being inserted into the recesses 84 of the hooks 83. The transverse distribution of the longitudinal bar L with the aid of the hook chains 82 takes place as described in the exemplary embodiment according to FIG. 6a.

After the longitudinal bars have been distributed, they are transferred to the Emfadelzangen 64 and thus the longitudinal bar feed plane Z-Z as follows:

A lifting device 85, for example in the form of a working cylinder, is arranged on each thread tongs 64 and has a comb-out pin 86. Each comb-out pin 86 can be advanced in accordance with the directions of the double arrow P23 m and the path of movement of the hooks 83 can be withdrawn therefrom. By pushing the comb-out pins 86 m the path of movement of the hooks 83, the feed path of the long bar is blocked, so that the long bars are combed out of the hooks 83 by moving the hook chains 82 and m the open jaws 79, 81 of the threading pliers 64 underneath open can. The transfer of the longitudinal bar coulter to the roller feed device 33 of the lattice welding machine 9 and the subsequent sequence for transverse distribution of the longitudinal bar of a lattice mat to be subsequently welded corresponds to the exemplary embodiment according to FIG. 6a.

In the exemplary embodiment shown in FIG. 8, the transverse distribution device 58 has a plurality of endless distribution chains 87 which are provided with a plurality of rod fixings 88 and can be driven by the drive roller 60 in accordance with the direction of the arrow P24 and are guided over the deflection roller 61. Adjacent rod fixings 88 form gaps for receiving the longitudinal rod L. All distribution chains 87 are driven synchronously in order to be able to jointly distribute a longitudinal rod jointly. The distribution chains 87 are aligned with the Ford screws 54, except for the denser area filled with Ford screws 54 near the lattice welding machine 9. The circulating movement of the distribution chains 87 takes place in the opposite direction to the circulating movements of the previous exemplary embodiments. written chains. The maximum number of gaps for receiving the longitudinal bars L in the upper horizontal region of the distribution chains 87, which defines the distribution plane VV and is below the longitudinal bar feed plane ZZ, corresponds at least to the maximum number of longitudinal bars that can be welded in the lattice welding machine 9. The longitudinal rods L are fed from the rod guide channels 32, 32 ′ of the outlet channel 31 into the screw conveyors 54 with the aid of the feed device 56 as described in the exemplary embodiment according to FIG. 6a. The feeding of the distribution chains 87 with the longitudinal bars L through the screw conveyors 54 also takes place as described in the embodiment according to FIG. 6a. The feeding of the distribution chains 87 with the longitudinal bars L through the screw conveyors 54 differs from this previously described exemplary embodiment only in that the outlet end of the screw conveyor 54 is arranged above the drive roller 60 and the longitudinal bars L are inserted into the spaces between the bar fixtures 88, whereby due to the different direction of movement of the distribution chains 87, the longitudinal bars lie above the distribution chains 87. The transverse distribution of the longitudinal bars L with the aid of the distribution chains 87 takes place as described in the exemplary embodiment according to FIG. 6a. However, since the longitudinal bars do not have to be deflected around the drive roller 60, the transverse distribution process is somewhat shorter and therefore faster. The transfer device 64 has a plurality of lifting beams 89 which extend parallel to the distribution chains 87 and are arranged in a uniformly distributed manner above the longitudinal bar feed plane ZZ. This distribution of the walking beams 89 corresponds approximately to the distribution of the transverse distributing devices 58 described in FIG. 5a. All walking beams 89 can be raised and lowered together in accordance with the directions of the double arrow P25, in accordance with the directions of the double arrow P15 (FIG. 5a) parallel to Production direction Pl can be moved and moved laterally according to the directions of the double arrow P26. A plurality of roller brackets 90, which have a track roller 91 provided with a track groove and a guide 92, hang on each walking beam 89. The tops of the rollers 91 define the longitudinal bar feed plane ZZ. The maximum number of roll holders 90 corresponds at least to the maximum number of longitudinal bars that can be welded in the lattice welding machine 9.

After transverse distribution of the longitudinal bars with the aid of the distribution chains 87, these are taken over by the rollers 91 in the following way:

All walking beams 89 are lowered together until the rollers 91 are securely entirely beneath the longitudinal bars lying on the bar fixings 88, that is to say below the distribution plane V-V. Subsequently, all walking beams 89 are laterally shifted together until the rollers 91 lie exactly below the longitudinal bars. By lifting all the walking beams 89 together, the longitudinal bars are lifted out of the bar fixings 88. Finally, all walking beams 89 are pushed back laterally in the opposite direction until the positions of the longitudinal bars correspond to the positions specified by the longitudinal bar division in the lattice mat to be produced. All walking beams 89 then move together in the production direction Pl in order to transfer the longitudinal bars to the roller feed device 33 and to insert the front ends of the longitudinal bars into the pairs of feed rollers 66. The rollers 91 on the walking beam 89 simultaneously serve as guides and supports for the longitudinal bars during the welding process in the grid welding machine 9. The threading tongs 65 and the transport rollers 63 are omitted in this embodiment.

While the lifting beams 89 are in the transfer and guide position, the distribution chains 87 can already be equipped with the longitudinal bars for the lattice mat to be subsequently welded. As soon as the rollers 91 are no longer required as a guide and support, the lifting beams 89 move back together towards the production direction Pl to their starting position in order to take over a new longitudinal bar set from the distribution chains 87. As soon as the ends of the longitudinal bars still in the lattice welding machine 9 have left the feed rollers 66 of the roller feed device 33, the new longitudinal bar set can be transferred from the walking beam 89 to the roller feed device 33. Within the scope of the invention, it is possible not to move the lifting beams 89 laterally to lift the longitudinal rod L out of the rod fixings 88 and instead to move the distribution chains 87 laterally in the direction of the opening of the roller holder 90 when the lifting beams 89 are lowered. In this case, the transverse distribution of the longitudinal bar through the distribution chains 87 must not be entirely n the positions specified by the longitudinal bar division m of the lattice mat to be produced.

FIG. 9 shows a further exemplary embodiment of a transverse distribution device 58 which, analogously to the exemplary embodiment according to FIG. 8, distributes the longitudinal bar L, L 'transversely in a distribution plane V-V lying below the longitudinal bar feed plane Z-Z. The transverse distribution device 58 has a plurality of fixed strips 93 and a plurality of movable delivery strips 94, each strip 93 and each delivery strip 94 being arranged horizontally and being provided with a plurality of sawtooth-like recesses 95 at the top for receiving one longitudinal rod L per recess 95. The longitudinal bar L m in the recesses 95 define the distribution plane V-V lying below the longitudinal bar feed plane Z-Z.

Each conveyor bar 94 is set in a circular motion by means of an eccentric disk 96 driven in the direction of the arrow P27. The strips 93 and the front strips 94 are aligned with the Ford screws 54, except for the area near the mesh welding machine 9 which is more densely populated with Ford screws 54. The maximum number of recesses 95 per strip 93 and per molding 94 corresponds at least to the maximum number m of the mesh welding machines 9 that can be welded Long bar. The longitudinal rod L is fed from the rod guide channels 32, 32 'of the outlet channel 31 m to the augers 54 with the aid of the feed device 56 as described in the exemplary embodiment according to FIG. 6a. The bars 93 and the front bars 94 are also loaded with the longitudinal bars L through the screw conveyors 54 as described in the exemplary embodiment according to FIG. 6a, here, analogously to the exemplary embodiment according to FIG. 8, the outlet end of the auger 54 above the bars 93 and Conveyor strips 94 are arranged and the longitudinal bar L is inserted into the recesses 95. The cross The longitudinal bar L is distributed according to the direction of the arrow P5 by the circular movement of the front bar 94, the longitudinal bar L being lifted from a recess 95 of the bar 93 m and the adjacent recess. All conveyor bars 94 are driven synchronously in order to be able to jointly distribute a longitudinal bar transversely.

The transfer device 64 is identical in structure and function in terms of the exemplary embodiment according to FIG. 8. In this case, all walking beams 89 are lowered together until the rollers 91 are securely, as a whole, below the longitudinal bars lying on the recesses 95, that is to say below the distribution plane V-V.

In F g. 10 shows a further exemplary embodiment of a transverse distribution device 58, which, analogous to the exemplary embodiment according to FIG. 9, distributes the longitudinal bar L, L 'transversely in a distribution plane V-V lying below the longitudinal bar supply plane Z-Z. The cross-distribution device 58 has a plurality of driven spindles 97, each spindle 97 being arranged horizontally, transversely to the production direction P1 and having a plurality of threads 98 for receiving a longitudinal rod L per thread 98 " Distribution level VV below the longitudinal bar feed level ZZ.

The spindles 97 are aligned with the Ford screws 54, except for the area near the mesh welding machine 9 which is more densely populated with Ford screws 54. The maximum number of threads 98 per spindle 97 corresponds at least to the maximum number of longitudinal bars m that can be welded m of the mesh welding machine 9. The longitudinal rod L is fed from the rod guide channels 32, 32 'of the outlet channel 31 m to the augers 54 with the aid of the feed device 56 as described in the exemplary embodiment according to FIG. 6a. The spindles 97 are also loaded with the longitudinal bar L through the Ford screws 54 as described in the embodiment according to FIG. 6a, here, analogously to the embodiment according to FIG. 9, the outlet end of the Ford screw 54 is arranged above the spindles 97 and the longitudinal bar L is m inserted the threads 98. The transverse distribution of the longitudinal bar L corresponding to the The direction of the arrow P5 is caused by the rotational movement of the spindles 97. All spindles 97 are driven synchronously in order to be able to jointly distribute a longitudinal rod transversely.

The structure and function of the transfer device 64 are identical to the exemplary embodiment according to FIG. 8. Here, all walking beams 89 are lowered together until the rollers 91 are securely entirely beneath the longitudinal bars lying on the threads 98, that is to say below the distribution plane V-V. It goes without saying that the exemplary embodiment shown can be modified in various ways within the scope of the general inventive concept, in particular with regard to the design and implementation of the supply of the longitudinal and transverse bars to the grid welding machine 9. In the context of the invention, it is possible to increase the production speed and / or by

To be able to feed cross bars of different dimensions, to arrange a device for producing the stretched, elongated cross bars Q on both sides of the grid welding machine 9.

Furthermore, it is possible within the scope of the invention to combine the various exemplary embodiments as desired.

Within the scope of the invention, it is possible to collect and bundle the cross bars 0 in a storage magazine after they have been cut off from the endless cross wire cores. The cross bars are removed from this magazine in bundles and, for example, placed in a cross wire magazine on the grid welding system with the aid of a crane. The cross bars are removed from the cross wire magazine and fed to the welding line.

Furthermore, in the context of the invention, two transverse bars, known as double bars, can also be introduced into the welding line W of the lattice welding machine 9 at the same time. Furthermore, it is possible within the scope of the invention to increase the production speed by two. Provide welding lines W so that the grid welding machine 9 can work in the double-wire welding process working in the longitudinal wire direction. In the context of the invention, it is possible to combine other adjacent, but in their function different facilities to compact assemblies to reduce the space requirement. Furthermore, it is possible within the scope of the invention to use other transverse distribution devices, such as, for example, conveyor belts.

Furthermore, within the scope of the invention, the conveyor screws 54 of the conveyor device can feed the longitudinal bars L, L 'to the transverse distribution device 58 in a uniform cycle, so that the longitudinal bars L, L' are evenly distributed across the transverse distribution device. The longitudinal bars are then brought into the longitudinal bar feed plane Z-Z in a uniformly distributed manner and also transferred to the roller feed device 33 in a uniformly distributed manner. In order to bring the longitudinal bars into a position which corresponds to the longitudinal bar division of the lattice mat to be produced, a deflection device is provided between the roller feed device 33 and the welding line W. The deflection device has, for example, several spring steel strips which form guide channels for the longitudinal bars and deflect them laterally accordingly. This embodiment has the advantage that when changing the longitudinal bar division only the corresponding facilities of the grid welding machine have to be adapted.

Furthermore, it is possible within the scope of the invention to arrange the distribution plane V-V and the longitudinal bar feed plane Z-Z next to one another at the same level. In this exemplary embodiment, the longitudinal bars are shifted in groups laterally from the distribution plane V-V into the longitudinal bar feed plane Z-Z and then fed to the grid welding machine 9.

Within the scope of the invention it is also possible to provide on one side of the feed and distribution device 4, 4 'an intermediate store for bundles of cut, straightened and stretched or also non-stretched longitudinal bars which were produced on other production systems. The longitudinal bars are either singly fed from this buffer to the bar guide channels 32, 32 'of the outlet channels 31, 31' or directly to the conveyor devices 54. This embodiment makes it possible to provide longitudinal bars of the system according to the invention which are produced on other production systems or come from a buffer store; this applies for example se for longitudinal bars with diameters or properties that deviate from the usual design.

Claims

Claims:

1. Method for producing lattice mats from longitudinal and cross bars that cross each other and are welded to one another at the crossing points, the material strands used to form the longitudinal and cross bars made of hot-rolled material being continuously withdrawn from a wire supply, thereby improving their mechanical Technological properties are stretched, then trained and cut to length, whereupon the longitudinal bars are introduced into the grid welding machine in groups and welded to the transverse bars in this, characterized in that the material strands for forming the cross bars are fed at a lower speed than the material strands for forming the Longitudinal bars and that the longitudinal and transverse bars are produced from strands of material which preferably run parallel to the direction of production, all strands of material for the transverse bars being deflected by 90 ° and the number of strands of material for the Q. is larger than that for the longitudinal bars. 2. The method according to claim 1, characterized in that the cut L n ^g sst be aligned with their ends facing the lattice welding machine in a line parallel to the welding line of the lattice welding machine and first one of those through the welding line of the lattice welding machine and the longitudinal bar coulters defined horizontal longitudinal bar feed planes are fed to different horizontal distribution planes and are distributed transversely in this distribution plane, whereupon the longitudinal bars are then brought in groups from this distribution plane into the longitudinal bar feed plane and finally introduced into the grid welding machine in groups.

3. The method according to claim 2, characterized in that the cut, aligned longitudinal bars of the distribution plane are fed individually according to the longitudinal bar division of the lattice mat to be produced. 4. The method according to any one of claims 1 to 3, characterized in that at least two strands of material are provided on one side of the longitudinal rod feed plane for generating the longitudinal rod.

5. The method according to any one of claims 1 to 4, characterized in that at least one strand of material is supplied to produce the longitudinal rods on both sides of the longitudinal rod feed plane. 6. The method according to any one of claims 1 to 5, characterized in that the strands of material for producing the longitudinal bars are deflected once by 180 °.

7. The method according to any one of claims 1 to 6, characterized in that the longitudinal rods are distributed transversely above the longitudinal rod feed plane.

8. The method according to any one of claims 1 to 6, characterized in that the longitudinal bars are distributed transversely below the longitudinal bar feed plane.

9. The method according to any one of claims 1 to 8, characterized in that for the production of the longitudinal and transverse bars, the continuously drawn strands of material are conveyed into a buffer memory and the separation of the longitudinal and transverse bars is carried out discontinuously.

10. The method according to any one of claims 1 to 8, characterized in that the feed of the strands of material and that

The longitudinal and transverse bars are cut off continuously.

11. The method according to any one of claims 1 to 10, characterized in that the improvement of the mechanical-technological properties of the longitudinal and transverse bars is carried out by bending corners.

12. System for carrying out the method according to one of claims 1 to 11, each with a drain device for the wire supply, a stretching device, a feed device, a straightening device and a cutting device for producing the longitudinal bars and the transverse bars, with a distribution device and a transfer device for the longitudinal bars and with a grid welding machine for welding the longitudinal bar coulter to the transverse bars, characterized in that each strand of material (Ll, L2; Ll ', L2'; Ql, Q2, Q3, Q4) for the longitudinal and crossbars (L, L '; Q) seen in the flow direction one after the other at least one drain device (1, 1'), a dressage device with inlet guide nozzles (25, 25 '; 34, 34'), a threading device (26, 26 '; 35, 35 '), a stretching device (27, 27 '; 36, 36'), a feed device (28, 28 '; 37, 37'), a straightening device (30, 30 ', 44, 47; 41, 50) and a cutting device (3, 3 ', 45, 48; 7, 42, 51), and that each lengthened longitudinal bar (L, L') is arranged in at least one outlet channel (31, 31 ') with at least one longitudinal bar arranged laterally parallel to the longitudinal bar feed plane (ZZ) - Track (Sl; S2) and at least two rod guide channels (32, 32 ') per track (Sl, S2) can be conveyed, with the ends of the longitudinal bars (L, L') facing the grid welding machine (9) being aligned on a parallel to the Welding line (W) extending stop (57) a conveyor device (54) is provided with which the longitudinal bars (L, L ') are intermittently (P14) into a transverse distribution device (58) for transverse distribution of the longitudinal bars (L, L') in the distribution plane (VV) are eligible. 13. Plant according to claim 12, characterized in that the straightening devices (7, 41, 50) for the cross wires (Ql, Q2, Q3, Q4) have high-speed straightening rotors.

14. Plant according to claim 12 or 13, characterized in that the straightening devices (30, 30 ', 44, 47) for the longitudinal wires (Ll, L2, Ll', L2 ') have a plurality of straightening rollers which are offset in two rows can be adjusted to one another individually or jointly electronically in accordance with the diameter and the mechanical-technological properties of the longitudinal wires. 16. System according to one of claims 12 to 14, characterized in that the conveying device (54) consists of several, laterally on the distribution plane ( VV) arranged conveyor screws, the conveying cycle (P14) of the conveyor screws (54) being selected according to the longitudinal bar division of the lattice mat to be produced.

16. Plant according to one of claims 12 to 14, characterized in that the conveyor (54) from a plurality of laterally arranged on the distribution level (VV) arranged with a uniform cycle (P14) drivable augers (54) is formed and that in front of the welding line (W) of the welding system (9) a deflection device for the longitudinal rod (L, L ') is provided in order to distribute the longitudinal rods (L, L') distributed at a uniform distance to bring the position specified by the longitudinal bar division of the grid mat.

17. Plant according to one of claims 12 to 16, characterized in that the transverse distribution device (58) has at least two endless double circulation chains (59), each with two independently drivable (P20; P21), containing several driver jaws (75, 77) Partial chains (73, 74) is provided, the driving jaws (75) of one partial chain (73) with the driving jaws (77) of the other partial chain (74) for clamping the longitudinal bars (L, L ') in the distribution plane (VV) like pliers cooperate, and that for throwing off the longitudinal bars (L, L ') from the distribution plane (VV) into the longitudinal bar feed plane (ZZ) the driver jaws (75, 77) by relative movements (P20, P21) of the two partial chains (73, 74) are evident . 18. Installation according to one of claims 12 to 16, characterized in that the transverse distribution device (58) consists of at least two endless drivable (P22) hook chains (82), each of which has a plurality of hooks (83) for receiving a longitudinal rod (L, L ') in the distribution plane (VV), and that the longitudinal rods (L, L') for their transfer from the distribution plane (VV) to the longitudinal rod feed plane (ZZ) with Hl] fe pushable (P23) pins (86) from the hooks (83) can be combed out.

19. Plant according to one of claims 12 to 18, characterized in that the (P15) transfer device (64), which can be displaced parallel to the production direction (Pl), consists of a row of threading pliers that can be positioned parallel to the welding line (W) and runs parallel to the welding line (W). 65), each threading pliers (65) having visible jaws (79, 81) lying in the line wire feed plane (ZZ). 20. Plant according to one of claims 12 to 16, characterized in that the transverse distribution device (58) consists of at least two endless drivable (P24), with several rod fixations (88) provided distribution chains (87), the rod fixations (88) in the top horizontal distribution area (87) define the distribution level (VV).

21. Plant according to one of claims 12 to 16, characterized in that the transverse distribution device (58) from at least two fixed, several sawtooth-like recesses (95) for Holding the longitudinal bars (L, L ') having horizontal bars (93) and from at least two circularly drivable (P27) sawtooth-like recesses (95) for receiving the longitudinal bars (L, L') having horizontal conveyor bars (94) stands, the recesses (95) defining the distribution level (VV).

22. Plant according to one of claims 12 to 16, characterized in that the transverse distribution device (58) from at least two drivable, a plurality of threads (98) for receiving the longitudinal bars (L, L ') having horizontal spindles (97), wherein the upper sides of the threads (98) define the distribution level (VV).

23. System according to one of claims 20 to 22, characterized in that the transfer device (64) has a plurality of walking beams (89) which run transversely to the production direction (Pl) and are uniformly distributed over the longitudinal rod feed plane (ZZ), all walking beams (89) in common are movable in the transverse direction (P15) and in the longitudinal direction (P26) and can be raised and lowered (P25) and each walking beam (89) is provided with a plurality of rollers (91) lying in the longitudinal rod feed plane (ZZ).

24. Installation according to one of claims 12 to 23, characterized in that for separating the longitudinal and transverse rods (L, L '; Q) from the continuously advanced longitudinal and transverse wires (Ll, L2; Ll', L2 '; Ql , Q2, Q3, Q) flying cutting devices (3, 3 '45; 42) are provided.

25. Plant according to one of claims 12 to 23, characterized in that the feed devices (28, 28 '; 37, 37') each have a loop memory (46; 49) connected downstream and for separating the longitudinal and transverse bars (L, L '; Q) of the continuously advanced longitudinal and transverse wires (Ll, L2; Ll', L2 '; Ql, Q2, Q3, Q4) are provided cutting devices (48; 7, 51).

26. Plant according to claim 25, characterized in that the longitudinal wires (Ll, L2; Ll ', L2') in the guides of the loop memory (46) can be deflected.

27. Plant according to one of claims 12 to 25, characterized in that each line and cross-wire strand (Ll, L2; Ll ', L2'; Ql, Q2, Q3, Q4) can be deflected in its own deflection bend (39) which has a plurality of deflection rollers (49).

28. Plant according to one of claims 12 to 25, characterized in that each longitudinal wire (Ll, L2; Ll ', L2') can be deflected by means of rotatable, preferably drivable disks.

29. Plant according to one of claims 12 to 28, characterized in that the drain device (1, 1 ') is designed as a tangential extraction device (10, 10') with at least one drivable rotary plate (11, 11 ') .

30. Plant according to one of claims 12 to 28, characterized in that the drain device (1, 1 ') is designed as an overhead extraction device (13) with at least one drivable turntable (14, 14'). 31. Plant according to one of claims 12 to 28, characterized in that the drain device (1, 1 ') is designed as an overhead take-off device (18) with at least one pivotable receiving plate (20, 20').

32. Plant according to one of claims 12 to 31, characterized in that for each strand of material (Ll, L2; Ll ', L2'; Ql,

Q2, Q3. 04) a coating device (29, 29 '; 38, 38') is provided for all-round application of a preferably liquid drawing agent to the surface of the material strands (L1, L2; Ll ', L2'; Ql, Q2, Q3, Q4), wherein the coating devices (29, 29 '; 38, 38') are preferably arranged after the feed devices (28, 28 '; 37, 37').

33. System according to one of claims 12 to 32, characterized in that for the cross bars (Q) a serving as a buffer distribution and supply device (8) is provided, from which the cross bars are cyclically conveyable into the grid welding machine (9).

34. System according to one of claims 12 to 32, characterized in that for the cross bars (Q) at least one direct entry line (E) is provided in the grid welding machine (9).

35. System according to claim 34, characterized in that the weft line (E) coincides with the welding line (W).

36. System according to one of claims 12 to 34, characterized in that on one side of the distribution level (V-V) an intermediate storage for cut, directed longitudinal bars is provided, from which the longitudinal bars can be fed to the conveyor (54).

37. Installation according to one of claims 12 to 36, characterized in that several devices (3, 3 '; 25 to 30; 25' to 30 '; 44, 45; 47, 48) can be combined to form compact structural units.