Mat welding plant for producing concrete steel mats and method using the same

Abstract

Mesh welding plant (1) for producing reinforcing steel mesh from a plurality of bars (2, 3) by welding the bars (2, 3) to form a grid structure (4) consisting of longitudinal bars (2) and transverse bars (3), comprising: - at least one supply device (5) for supplying the plurality of bars (2, 3), - at least one welding device (6) for welding the bars (2, 3) to form the grid structure (4) consisting of longitudinal bars (2) and transverse bars (3), and - at least one transport device (7) for transporting the bars (2, 3) supplied by the at least one supply device (5) to the at least one welding device (6), wherein the at least one transport device (7) comprises at least one first positioning device (8) with which bars (2) can be positioned in a longitudinal direction (9) relative to the at least one welding device (6), and at least one second positioning device (10).which is pivotable relative to the first positioning device (8) and with which rods (3) can be positioned in a transverse direction (11) transverse to the longitudinal direction (9) relative to the at least one welding device (6), wherein the at least one transport device (7) has at least one support (51) on which at least one of the positioning devices (8, 10) is arranged.

Description

[0001] The invention relates to a mesh welding system for producing reinforcing steel mesh from a plurality of bars by welding the bars to form a lattice structure consisting of longitudinal bars and transverse bars, comprising at least one supply device for supplying the plurality of bars, at least one welding device for welding the bars, preferably step by step, to form the lattice structure consisting of longitudinal bars and transverse bars, and at least one transport device for transporting the bars supplied by the at least one supply device to the at least one welding device. The invention further relates to a method for producing reinforcing steel mesh from a plurality of bars by welding the bars to form a lattice structure consisting of longitudinal bars and transverse bars using such a mesh welding system.

[0002] The Figures 1a) and 1b) show two examples of a lattice structure 4 consisting of longitudinal bars 2 and transverse bars 3. These are special meshes used, for example, for precast concrete elements. The geometry of the reinforcing steel mesh can vary considerably and must correspond to the geometry and static requirements of the concrete element in which the reinforcing steel mesh is used.

[0003] The Figure 1a ) has a door opening 37, windows 38 and roof slopes 39.

[0004] The Figure 1b ) has openings 40 and bevels 41.

[0005] According to the state of the art, such special mats, especially in small precast concrete plants which have a low demand for reinforcing steel mats, are either cut from standard mats at great expense or are laboriously tied together from individual bars.

[0006] In addition, mesh welding systems are known from the state of the art in which the bars for welding the reinforcing steel mesh must either be prepared manually or fed to the welding device by a straightening machine using complex machine technology.

[0007] In manual systems, the bars are either placed in a welding pallet, which is then fed to the welding device, or the bars are placed directly into the welding device for welding.

[0008] Automatic mesh welding systems feature one or more straightening machines for straightening the longitudinal and transverse bars, as well as transport systems for conveying the bars to the welding device. Different transport systems are used for this. Separate straightening machines are sometimes used for the transverse bars so that the bars can be produced as close as possible to the welding line, thus enabling short transport routes. However, these systems require at least two straightening machines. State-of-the-art automatic mesh welding systems require a relatively large amount of space.

[0009] The document EP 2 529 857 A1 discloses an automatic mesh welding system for producing curved reinforcing steel meshes, in which the longitudinal and transverse bars are each transported via a carriage which is movable on rails lying on the floor.

[0010] The object of the present invention is to provide a mesh welding system that is improved over the prior art and at least partially avoids the disadvantages of the prior art. At the same time, the mesh welding system should be capable of fully automatically producing special meshes with at least the same flexibility as the systems known from the prior art. Furthermore, the mesh welding system should utilize materials as efficiently as possible and be constructed as compactly as possible in order to significantly reduce the investment costs of such a mesh welding system compared to the prior art. A further object is to provide a method for producing reinforcing steel mesh using such an improved mesh welding system.

[0011] These objects are achieved by the features of claims 1 and 10.

[0012] In the case of the mat welding system, it is therefore provided according to the invention that the at least one transport device has at least one first positioning device, with which bars can be positioned in a longitudinal direction relative to the at least one welding device, and at least one second positioning device which can be pivoted relative to the first positioning device and with which bars can be positioned in a transverse direction transverse to the longitudinal direction relative to the at least one welding device, wherein the at least one transport device has at least one carrier on which at least one, preferably all, of the positioning devices is / are arranged, preferably wherein the second positioning device is arranged displaceably and / or pivotably on the at least one carrier and / or the first positioning device is arranged stationary on the at least one carrier.

[0013] The at least one transport device ensures that the at least one supply device can supply bars that have essentially the same orientation, regardless of whether the bars are used as transverse bars or as longitudinal bars. After the bars have been supplied by the at least one supply device, the bars are then brought into the correct position relative to the welding device by means of the at least one transport device, depending on whether they are transverse bars or longitudinal bars.

[0014] This makes it possible to design the at least one supply device relatively simply. For example, it can be implemented with just one straightening machine, which results in significant space savings compared to the state of the art. In this case, the straightening machine produces all the bars required for the reinforcing steel mesh to be manufactured according to the CAD data, with the predetermined lengths and diameters.

[0015] The ability to design at least one supply device relatively simply allows the investment costs for the mesh welding system to be significantly reduced compared to the state of the art. At the same time, the flexibility known from the state of the art in the production of special meshes is at least retained.

[0016] According to a preferred embodiment, at least one of the positioning devices, preferably the second positioning device, is displaceable in the longitudinal direction. This allows the longitudinal bars to be fed directly to the welding device by means of the at least one transport device. At the same time, it is possible to allow the longitudinal bars to protrude beyond the welding line by varying distances, or in other words, to create different projection differences of the longitudinal bars. This allows for the simple creation of bevels 41, as shown in the Figure 1b ) shown.

[0017] It has been found to be advantageous that the positioning devices of the at least one transport device each have a longitudinal extension and the second positioning device can be pivoted between at least one first pivot position, in which the second positioning device is arranged parallel to and / or in extension of the first positioning device, and at least one second pivot position, in which the second positioning device is arranged transversely to the first positioning device.

[0018] If the second positioning device is arranged parallel to and in extension of the first positioning device, at least one longitudinal bar can be positioned with both the first and second positioning devices. The pivotability of the second positioning device allows a bar initially arranged in the longitudinal direction to be transferred to the transverse direction.

[0019] It is advisable that at least one, preferably all, of the positioning devices of the at least one transport device have at least one, preferably more than one, openable and closable gripper, and / or a preferably bridge-shaped and / or fixed frame is provided on which the at least one transport device is mounted so as to be movable, preferably in the transverse direction.

[0020] It has proven advantageous to provide at least one positioning trough in which at least one rod can be positioned in the transverse direction relative to the at least one welding device, preferably wherein at least one positioning unit is provided with which at least one rod arranged in the at least one positioning trough can be moved, particularly preferably pulled and / or pushed, relative to the at least one positioning trough, and / or at least one loading device, particularly preferably comprising a plurality of loading fingers, is provided with which at least one rod arranged in the at least one positioning trough can be conveyed from the at least one positioning trough to the at least one welding device, particularly preferably to at least one welding electrode of the at least one welding device.

[0021] These measures, individually or in combination with each other, make it possible in a particularly advantageous manner to weld at least one transverse bar from below to at least one longitudinal bar.

[0022] According to a preferred embodiment, at least one support table is provided on which a plurality of bars can be positioned parallel to one another and in the longitudinal direction relative to the at least one welding device, preferably wherein a plurality of positioning grooves for the bars, particularly preferably arranged equidistant from one another, are arranged on the at least one support table.

[0023] It is advisable that the at least one supply device comprises at least one straightening machine with at least one straightening device for straightening wire-, rod- or strip-shaped straightening material, and / or at least one magazine in which bars and / or straightening material to be straightened by means of at least one straightening machine, which preferably has different straightening material properties, can be stored, and / or at least one separating device for separating bars from a continuous strand, and / or at least one bar outlet for bars straightened by at least one straightening machine, preferably wherein the at least one bar outlet is circumferentially openable and closable, and / or at least one supply drawer movable relative to the at least one transport device, preferably in the transverse direction and / or between a bar loading position and a bar unloading position, in which at least one,preferably more than one, bar can be stored temporarily.,

[0024] It has proven advantageous that in a production direction, after the at least one welding device, at least one mat extraction device is arranged, on which at least one grid structure can be placed, preferably wherein the at least one mat extraction device has at least one adjusting device with which the at least one grid structure can be moved, preferably in the longitudinal direction, in particular exclusively in the longitudinal direction, and / or step by step, particularly preferably wherein the at least one adjusting device has at least one gripper unit that can be raised and lowered and / or opened and closed.

[0025] Alternatively or additionally, it can be provided that in a production direction downstream of the at least one welding device, at least one stacking carriage, preferably movable on rails and / or in the longitudinal direction, on which at least one, preferably more than one, completely welded grid structure can be deposited, is arranged, preferably wherein the at least one stacking carriage has at least one, preferably mouth-shaped, gripper for the at least one grid structure.

[0026] As stated at the outset, protection is also sought for a method for producing reinforcing steel mats from a plurality of bars by welding the bars to form a lattice structure consisting of longitudinal bars and transverse bars by means of a mat welding system according to the invention, the method comprising the following process steps: the plurality of bars is provided by means of the at least one provision device, the bars provided by the at least one provision device are transported by means of the at least one transport device to the at least one welding device, the bars are welded, preferably step by step, by means of the at least one welding device to form the lattice structure consisting of longitudinal bars and transverse bars, bars are positioned in the longitudinal direction relative to the at least one welding device at least by means of the at least one first positioning device of the at least one transport device and, before or after, bars are positioned in a transverse direction transverse to the longitudinal direction relative to the at least one welding device by means of the at least one second positioning device of the at least one transport device.

[0027] According to a preferred embodiment of this method, it is provided that in a further method step at least one of the positioning devices, preferably the second positioning device, of the at least one transport device and thereby at least one rod arranged therein are displaced in the longitudinal direction.

[0028] It has been found to be advantageous that the positioning devices of the at least one transport device each have a longitudinal extension and, in a further method step, the second positioning device is pivoted between at least one first pivot position, in which the second positioning device is arranged parallel to and / or in extension of the first positioning device, and at least one second pivot position, in which the second positioning device is arranged transversely to the first positioning device.

[0029] Alternatively or additionally, it can be provided that in a further method step the at least one transport device is moved, preferably in the transverse direction.

[0030] It has proven advantageous to provide at least one positioning trough in which, in a further method step, at least one rod is positioned in the transverse direction relative to the at least one welding device, preferably wherein at least one positioning unit is provided with which, in a further method step, at least one rod arranged in the at least one positioning trough is moved, particularly preferably pulled and / or pushed, relative to the at least one positioning trough, and / or at least one loading device, particularly preferably comprising a plurality of loading fingers, is provided with which, in a further method step, at least one rod arranged in the at least one positioning trough is conveyed from the at least one positioning trough to the at least one welding device, particularly preferably to at least one welding electrode of the at least one welding device.

[0031] Finally, it is advantageous that the at least one supply device comprises at least one separating device with which bars are separated from a continuous strand in a further method step, and / or comprises at least one supply drawer which is movable relative to the at least one transport device and in which at least one, preferably more than one, bar is temporarily stored in a further method step, preferably wherein the at least one supply drawer is moved in the transverse direction and / or between a bar loading position and a bar unloading position.

[0032] Further details and advantages of the invention are explained in more detail below with reference to the figures and the drawings, in which: Fig. 1a), b) two examples of a lattice structure consisting of longitudinal bars and transverse bars, Fig. 2a), b) a preferred embodiment of a mesh welding system in a schematically illustrated perspective view, wherein the shield 42 is not shown in partial figure b), Fig. 3 an assembly of the mesh welding system comprising the bar outlet, the transport device, the storage table and the welding device in a schematically illustrated perspective view, Fig. 4 an assembly of the mesh welding system comprising the bar outlet, the transport device and the storage table in a schematically illustrated perspective view, Fig. 5 an assembly of the mesh welding system comprising the bar outlet and the transport device in a schematically illustrated perspective view, Fig.6 the transport device in a schematically illustrated perspective view, wherein two positions of the transport device are shown as examples, Fig. 7 an assembly of the mat welding system comprising the frame and the transport device movably mounted thereon in a schematically illustrated perspective view, Fig. 8 the welding device in a schematically illustrated perspective view, Fig. 9 a partial section of the mat welding system in a schematically illustrated cross-sectional view from the side, wherein a welding of a cross bar below a longitudinal bar is illustrated, Fig. 10 a partial section of the mat welding system in a schematically illustrated cross-sectional view from the side, wherein a welding of a cross bar above a longitudinal bar is illustrated, Fig.Fig. 11 shows a partial section of the mesh welding system in a schematically illustrated plan view from above, illustrating a different positioning of three longitudinal bars in the longitudinal direction, Fig. 12 shows a partial section of the mesh welding system in a schematically illustrated cross-sectional view from the side, illustrating a movement of the grid structure in the longitudinal direction, Fig. 13 shows a mesh extraction device of the mesh welding system in a schematically illustrated perspective view, and Fig. 14 shows a stacking carriage of the mesh welding system in a schematically illustrated perspective view.

[0033] The Figures 1a) and 1b ) have already been described in the introduction. The mesh welding system 1 described below makes it possible to produce such special meshes.

[0034] The Figures 2a) and 2b) show a preferred embodiment of a mat welding system 1, wherein the partial figures differ essentially in that in partial figure b) a shield 42 surrounding the mat welding system 1 at least in part is not shown.

[0035] The mesh welding system 1 for producing reinforcing steel mesh from a plurality of bars 2, 3 by welding the bars 2, 3 to form a lattice structure 4 consisting of longitudinal bars 2 and transverse bars 3 comprises a supply device 5 for supplying the plurality of bars 2, 3, a welding device 6 for, preferably step-by-step, welding of the bars 2, 3 to form the lattice structure 4 consisting of longitudinal bars 2 and transverse bars 3, and a transport device 7 for transporting the bars 2, 3 provided by the supply device 5 to the welding machine 6.As can be seen from the following figures, the transport device 7 comprises a first positioning device 8, with which bars 2 can be positioned in a longitudinal direction 9 relative to the welding device 6, and a second positioning device 10, which can be pivoted relative to the first positioning device 8 and with which bars 3 can be positioned in a transverse direction 11 transverse to the longitudinal direction 9 relative to the welding device 6.

[0036] The supply device 5 comprises a straightening machine 21 with at least one straightening device for straightening wire, rod, or strip-shaped straightening material 22, and a magazine 23 in which straightening material 22 to be straightened, which preferably has different straightening material properties, can be stored by means of at least one straightening machine 21. Alternatively or additionally, the magazine 23 can be designed to store rods 2, 3.

[0037] In the concrete case shown, the magazine 23 comprises unwinding devices 43 for coils on which straightening material 22 with different straightening material properties, such as steel wires with different diameters, is wound.

[0038] In a production direction 27 downstream of the welding device 6, a mat extraction device 28 is arranged, on which at least one grid structure 4 can be placed.

[0039] In a production direction 27 after the welding device 6 and after the mat extraction device 28, a stacking carriage 32 is arranged, which can be moved on rails 31 and in the longitudinal direction 9 and on which more than one completely welded grid structure 4 can be deposited.

[0040] The mat welding system 1 has a control device with which grid structures 4, in particular special mats of the type Figures 1a) and 1b) shown. An operator 45 can monitor the production process via a control panel 44.

[0041] The Figures 3 to 7 show an area of ​​the mesh welding system 1, which is arranged in the production direction 27 between the straightening machine 21 and the welding device 6 and in particular comprises the transport device 7.

[0042] The transport device 7 is shown in several positions by way of example to illustrate the process. However, the specific embodiment involves precisely one transport device 7, with a bridge-shaped and stationary frame 13 being provided, on which the transport device 7 is mounted for movement in the transverse direction 11.

[0043] The supply device 5 comprises a bar outlet 25 for bars 2, 3 straightened by the straightening machine 21. The bar outlet 25 can be designed, for example, to be tubular and / or to be openable and closable on the circumference.

[0044] A cutting device 24 for cutting bars 2, 3 from a continuous strand is arranged between the straightening machine 21 and the bar outlet 25. This allows bars 2, 3 of a predetermined length to be provided.

[0045] The provision device 5 comprises a provision drawer 26 which can be moved relative to the transport device 7 in the transverse direction 11 and / or between a bar loading position and a bar unloading position and in which at least one, preferably more than one, bar 2, 3 can be temporarily stored.

[0046] In the concrete embodiment shown, for example, three bars 2, 3 can be arranged parallel to one another in the supply drawer 26.

[0047] The bars 2, 3 can be transported from the bar outlet 25 via openable and closable retaining elements 46 and under the influence of gravity into the supply drawer 26. For this purpose, the supply drawer 26 is located essentially below the bar outlet 25. This position thus represents a bar loading position.

[0048] The supply drawer 26 under the bar outlet 25 serves as a buffer and for the supply of the longitudinal bars 2 and the cross bars 3 for the transport device 7.

[0049] After the supply drawer 26 is filled with one or more bars 2, 3, it is moved from the bar loading position to the bar unloading position. For this purpose, it moves in the transverse direction 11 and toward the transport device 7.

[0050] In the Figures 3 to 5 and 7The supply drawer 26 is shown in both end positions. However, this specific embodiment involves exactly one supply drawer 26.

[0051] By means of the transport device 7, bars 2, 3 provided by the provision device 5 can be positioned relative to the welding device 6. For this purpose, the transport device 7 comprises a first positioning device 8, with which bars 2 can be positioned in a longitudinal direction 9 relative to the welding device 6, and a second positioning device 10, which is pivotable relative to the first positioning device 8 and with which bars 3 can be positioned in a transverse direction 11 transverse to the longitudinal direction 9 relative to the welding device 6.

[0052] In the concretely illustrated embodiment, the positioning devices 8, 10 of the transport device 7 have a plurality of openable and closable grippers 12 with which the bars 2, 3 can be gripped and placed at a predetermined position relative to the welding device 6.

[0053] The positioning devices 8, 10 of the transport device 7 each have a longitudinal extension and the second positioning device 10 is pivotable between at least one first pivot position, in which the second positioning device 10 is arranged parallel and in extension to the first positioning device 8, and at least one second pivot position, in which the second positioning device 10 is arranged transversely to the first positioning device 8.

[0054] This is particularly evident from the Figure 6 in which the transport device 7 is shown in two different operating positions.

[0055] The transport device 7 has a beam-shaped support 51 on which the positioning devices 8, 10 are arranged, wherein the second positioning device 10 is arranged displaceably and pivotably on the support 51 and the first positioning device 8 is arranged stationary on the support 51.

[0056] A storage table 19 is provided on which a plurality of bars 2 can be positioned parallel to one another and in the longitudinal direction 9 relative to the welding device 6, wherein a plurality of positioning grooves 20 for the bars 2 are arranged equidistant from one another on the storage table 19 (compare, for example, the Figure 4 ).

[0057] In order to pick up one or more bars 2, 3 from the supply drawer 26, the second positioning device 10 is in the first pivot position, in which the second positioning device 10 is arranged parallel and in extension to the first positioning device 8. The transport device 7 is arranged above the supply drawer 26 (compare, for example, the Figure 3 ).

[0058] To position one or more bars 2 in the longitudinal direction 9 relative to the welding device 6, the second positioning device 10 remains in the first pivot position. The transport device 7 is moved in the transverse direction 11 along the frame 13 until it reaches a position in which the bar(s) 2 are to be placed on the support table 19.

[0059] The transport device 7 places the longitudinal bar(s) 2 positioned in the longitudinal direction 9 and transverse direction 11 on the storage table 19.

[0060] The second positioning device 10 is displaceable in the longitudinal direction 9. This makes it possible to advance the rod(s) 2 to different distances in the longitudinal direction 9.

[0061] This is exemplified by three longitudinal bars 2 arranged parallel to each other in the Figure 11 Shown: Due to a different displacement, the middle rod 2 protrudes furthest beyond the welding line marked by the welding electrode 18. The adjacent rods 2 have a distance of 47 and 48 relative to the middle rod 2, with the distances 47 and 48 being different.

[0062] In order to position one or more bars 3 in the transverse direction 11 relative to the welding device 6, the bar(s) 3 are picked up by the transport device 7 from the supply drawer 26. For this purpose, the transport device 7 is located above the supply drawer 26. The second positioning device 10 is arranged in the first pivot position, in which the second positioning device 10 is arranged parallel to and in extension of the first positioning device 8.

[0063] After the rod(s) 3 have been picked up, the transport device 7 is moved on the frame 13 in the transverse direction 11 and before, after or during this movement the second positioning device 10 is pivoted from the first pivot position into the second pivot position in which the second positioning device 10 is arranged transversely to the first positioning device 8.

[0064] The second positioning device 10 can optionally also be moved in the longitudinal direction 9 in order to set a predetermined distance of the rod(s) 3 from the welding line.

[0065] Subsequently, two cases can be distinguished, which are described in detail in the Figures 9 and 10 are shown: In the first case, which is shown in the Figure 9 As illustrated, a transverse bar 3 is to be welded below a longitudinal bar 2.

[0066] For this case, the mat welding system 1 has a positioning trough 14 in which at least one rod 3 can be positioned in the transverse direction 11 relative to the welding device 6.

[0067] The bar(s) 3 are placed in this positioning trough 14 by means of the transport device 7.

[0068] As for example from the Figure 4As can be seen, a positioning unit 15 is provided with which the rod(s) 3 can be moved relative to the positioning groove 14, e.g. pulled and / or pushed.

[0069] The positioning trough 14 is laterally extended for the placement of the cross bars 3. The positioning unit 15 pushes and / or pulls the cross bars 3 into the correct transverse position for feeding the cross bars 3 into the welding electrode 18.

[0070] A loading device 16 is provided, which in the specific case illustrated comprises several loading fingers 17. With the aid of the loading device 16, the rod(s) 3 arranged in the positioning trough 14 can be conveyed from the positioning trough 14 to the welding device 6, specifically to the welding electrode 18 of the welding device 6.

[0071] For this purpose, as can be seen from the Figure 9As can be seen, a cross bar 3 is picked up from the positioning trough 14 by means of the loading fingers 17 and placed on the welding electrode 18 by a pivoting movement. The welding electrode 18 is height-adjustable and, after a cross bar 3 has been placed, can be moved toward the longitudinal bar(s) 2. The cross bar 3 can then be welded to the longitudinal bar(s) 2.

[0072] So much for the first case. In the second case, which is in the Figure 10 As illustrated, a cross bar 3 is to be welded above a longitudinal bar 2.

[0073] For this purpose, the cross bar(s) 3 are placed directly into the welding device 6 using the transport system and then welded to the longitudinal bar(s) 2.

[0074] The Figure 8 shows the welding device 6 in a schematic perspective view.

[0075] The welding device 6 comprises a stationary frame structure 50 and two welding heads 34 mounted thereon for movement. The welding heads 34 are supplied with the energy required to weld the rods 2, 3 via busbars 35. The welding electrode 18 acts as the counter electrode. A lifting unit 36 ​​is provided, with which the height of the welding electrode 18 can be adjusted. Instead of the welding electrode 18 shown, one or more welding heads can also be used. The rods 2, 3 are connected at the intersection points by resistance welding.

[0076] The Figure 12 shows a partial section of the mesh welding system 1 in a schematic cross-sectional view from the side to illustrate a movement of the grid structure 4 in the longitudinal direction 9.

[0077] After all longitudinal bars 2 have been welded to the first cross bar 3, the first cross bar is gripped by at least one gripper unit 30, which transports the cross bar together with the welded longitudinal bars to the next cross bar position.

[0078] The at least one gripper unit 30 can be arranged, as in the specific embodiment, on a mat extraction device 28, as shown in the Figure 13 is shown.

[0079] This mat extraction device 28, which is arranged downstream of the welding device 6 in the production direction 27 and on which at least one grid structure 4 can be placed, has an adjusting device 29 with which the at least one grid structure 4 can be moved, preferably in the longitudinal direction 9, in particular exclusively in the longitudinal direction 9, and / or step by step, wherein the adjusting device 29 has at least one gripper unit 30 which can be raised and lowered and / or opened and closed.

[0080] The adjusting device 29 is slidably mounted on guide rails 49.

[0081] It is advisable for the mat extraction device 28 to have plastic supports on which the at least one grid structure 4 can be placed.

[0082] The Figure 14 shows a stacking carriage 32, which is arranged in the production direction 27 after the welding device 6 and after the mat extraction device 28. The stacking carriage 32 is movable on rails 31 and / or in the longitudinal direction 9. At least one, preferably more than one, fully welded grid structure 4 can be placed on the stacking carriage 32. The stacking carriage 32 has jaw-shaped grippers 33 for the at least one grid structure 4. To pick up a grid structure 4, the stacking carriage 32 moves to the mat extraction device 28, grips the grid structure 4, and pulls it from the mat extraction device 28.

Claims

1. A mesh welding system (1) for producing reinforcing steel mesh from a plurality of bars (2, 3) by welding the bars (2, 3) to form a lattice structure (4) consisting of longitudinal bars (2) and transverse bars (3), comprising - at least one supply device (5) for supplying the plurality of bars (2, 3), - at least one welding device (6) for, preferably step-by-step, welding of the bars (2, 3) to form the lattice structure (4) consisting of longitudinal bars (2) and transverse bars (3), and - at least one transport device (7) for transporting the bars (2, 3) supplied by the at least one supply device (5) to the at least one welding device (6), characterized in thatthe at least one transport device (7) has at least one first positioning device (8) with which bars (2) can be positioned in a longitudinal direction (9) relative to the at least one welding device (6), and at least one second positioning device (10) which can be pivoted relative to the first positioning device (8) and with which bars (3) can be positioned in a transverse direction (11) transverse to the longitudinal direction (9) relative to the at least one welding device (6), wherein the at least one transport device (7) has at least one carrier (51) on which at least one, preferably all, of the positioning devices (8, 10) is / are arranged, preferably wherein the second positioning device (10) is displaceably and / or pivotably arranged on the at least one carrier (51) and / or the first positioning device (8) is stationary on the at least one carrier (51).

2. Mat welding system (1) according to claim 1, wherein at least one of the positioning devices (8, 10), preferably the second positioning device (10), is displaceable in the longitudinal direction (9).

3. Mat welding system (1) according to claim 1 or 2, wherein the positioning devices (8, 10) of the at least one transport device (7) each have a longitudinal extension and the second positioning device (10) is pivotable between at least one first pivot position, in which the second positioning device (10) is arranged parallel and / or in extension to the first positioning device (8), and at least one second pivot position, in which the second positioning device (10) is arranged transversely to the first positioning device (8).

4. Mat welding system (1) according to one of claims 1 to 3, wherein - at least one, preferably all, of the positioning devices (8, 10) of the at least one transport device (7) has at least one, preferably more than one, openable and closable gripper (12), and / or - a preferably bridge-shaped and / or fixed frame (13) is provided, on which the at least one transport device (7) is mounted so as to be movable, preferably in the transverse direction (11).

5. Mat welding system (1) according to one of claims 1 to 4, wherein at least one positioning trough (14) is provided, in which at least one rod (3) can be positioned in the transverse direction (11) relative to the at least one welding device (6), preferably wherein - at least one positioning unit (15) is provided, with which at least one rod (3) arranged in the at least one positioning trough (14) can be moved, particularly preferably pulled and / or pushed, relative to the at least one positioning trough (14), and / or - at least one loading device (16), particularly preferably comprising a plurality of loading fingers (17), is provided, with which at least one rod (3) arranged in the at least one positioning trough (14) can be conveyed from the at least one positioning trough (14) to the at least one welding device (6), particularly preferably to at least one welding electrode (18) of the at least one welding device (6).

6. Mat welding system (1) according to one of claims 1 to 5, wherein at least one support table (19) is provided, on which a plurality of bars (2) can be positioned parallel to one another and in the longitudinal direction (9) relative to the at least one welding device (6), preferably wherein a plurality of positioning grooves (20) for the bars (2), particularly preferably arranged equidistant from one another, are arranged on the at least one support table (19).

7. A mesh welding system (1) according to one of claims 1 to 6, wherein the at least one supply device (5) comprises - at least one straightening machine (21) with at least one straightening device for straightening wire-, rod-, or strip-shaped straightening material (22), and / or - at least one magazine (23) in which bars (2, 3) and / or straightening material (22) to be straightened by at least one straightening machine (21), which preferably has different straightening material properties, can be stored, and / or - at least one separating device (24) for separating bars (2, 3) from a continuous strand, and / or - at least one bar outlet (25) for bars (2, 3) straightened by at least one straightening machine (21), preferably wherein the at least one bar outlet (25) is circumferentially openable and closable, and / or - at least one relative to the at least one transport device (7),preferably in the transverse direction (11) and / or between a bar loading position and a bar unloading position, comprises a provision drawer (26) which is movable and in which at least one, preferably more than one, bar (2, 3) can be temporarily stored.

8. Mat welding system (1) according to one of claims 1 to 7, wherein in a production direction (27) downstream of the at least one welding device (6) at least one mat extraction device (28) is arranged, on which at least one grid structure (4) can be placed, preferably wherein the at least one mat extraction device (28) has at least one adjusting device (29) with which the at least one grid structure (4) can be moved, preferably in the longitudinal direction (9), in particular exclusively in the longitudinal direction (9), and / or step by step, particularly preferably wherein the at least one adjusting device (29) has at least one gripper unit (30) that can be raised and lowered and / or opened and closed.

9. Mat welding system (1) according to one of claims 1 to 8, wherein in a production direction (27) downstream of the at least one welding device (6) at least one stacking carriage (32), which is preferably movable on rails (31) and / or in the longitudinal direction (9), on which at least one, preferably more than one, completely welded grid structure (4) can be placed, is arranged, preferably wherein the at least one stacking carriage (32) has at least one, preferably mouth-shaped, gripper (33) for the at least one grid structure (4).

10. A method for producing reinforcing steel mats from a plurality of bars (2, 3) by welding the bars (2, 3) to form a lattice structure (4) consisting of longitudinal bars (2) and transverse bars (3) by means of a mat welding system (1) according to one of claims 1 to 9, wherein the method comprises the following method steps: - the plurality of bars (2, 3) is provided by means of the at least one provision device (5), - the bars (2, 3) provided by the at least one provision device (5) are transported to the at least one welding device (6) by means of the at least one transport device (7), - the bars (2, 3) are welded, preferably stepwise, by means of the at least one welding device (6) to form the lattice structure (4) consisting of longitudinal bars (2) and transverse bars (3),- bars (2) are positioned in the longitudinal direction (9) relative to the at least one welding device (6) at least by means of the at least one first positioning device (8) of the at least one transport device (7) and, before or after, bars (3) are positioned in a transverse direction (11) transverse to the longitudinal direction (9) relative to the at least one welding device (6) by means of the at least one second positioning device (10) of the at least one transport device (7).

11. The method according to claim 10, wherein in a further method step at least one of the positioning devices (8, 10), preferably the second positioning device (10), of the at least one transport device (7) and thereby at least one rod (2) arranged therein are displaced in the longitudinal direction (9).

12. The method according to claim 10 or 11, wherein the positioning devices (8, 10) of the at least one transport device (7) each have a longitudinal extension and in a further method step the second positioning device (10) is pivoted between at least one first pivot position in which the second positioning device (10) is arranged parallel and / or in extension to the first positioning device (8), and at least one second pivot position in which the second positioning device (10) is arranged transversely to the first positioning device (8).

13. Method according to one of claims 10 to 12, wherein in a further method step the at least one transport device (7) is moved, preferably in the transverse direction (11).

14. The method according to one of claims 10 to 13, wherein at least one positioning trough (14) is provided, in which, in a further method step, at least one rod (3) is positioned in the transverse direction (11) relative to the at least one welding device (6), preferably wherein - at least one positioning unit (15) is provided, with which, in a further method step, at least one rod (3) arranged in the at least one positioning trough (14) is moved, particularly preferably pulled and / or pushed, relative to the at least one positioning trough (14), and / or - at least one loading device (16), particularly preferably comprising a plurality of loading fingers (17), is provided, with which, in a further method step, at least one rod (3) arranged in the at least one positioning trough (14) is moved from the at least one positioning trough (14) to the at least one welding device (6),particularly preferably at least one welding electrode (18) of the at least one welding device (6), 15. The method according to one of claims 10 to 14, wherein the at least one supply device (5) - comprises at least one separating device (24) with which, in a further method step, bars (2, 3) are separated from a continuous strand, and / or - comprises at least one supply drawer (26) which is movable relative to the at least one transport device (7) and in which, in a further method step, at least one, preferably more than one, bar (2, 3) is temporarily stored, preferably wherein the at least one supply drawer (26) is moved in the transverse direction (11) and / or between a bar loading position and a bar unloading position.

16. Method according to one of claims 10 to 15, wherein after the at least one welding device (6) at least one mat extraction device (28) is arranged, on which at least one grid structure (4) is placed, preferably wherein the at least one mat extraction device (28) has at least one adjusting device (29) with which the at least one grid structure (4) is moved, preferably in the longitudinal direction (9), in particular exclusively in the longitudinal direction (9), and / or step by step, particularly preferably wherein the at least one adjusting device (29) has at least one gripper unit (30) that can be raised and lowered and / or opened and closed.

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