A bending head for building steel mesh

Abstract

The present invention relates to a bending head (1) for a building steel mesh (2), comprising a frame (3), at least one bending surface (4) movable relative to the frame (3) for bending at least one wire (5) of the building steel mesh (2), at least one retaining member (6), at least one bending die (7), at least one bending arm (9), and at least one arm drive device (10), wherein the at least one wire (5) is supported on the retaining member when bent by means of the at least one bending surface (4), the bending die having at least partially a predetermined bending radius (8), the at least one bending surface (4) being arranged on the bending arm, the at least one bending arm (9) being adjustable relative to the frame (3) by means of the at least one arm drive device, wherein at least one bracket (11) is provided, the at least one bending arm (9) being movably supported at and / or on the at least one bracket, wherein at least one bracket drive device (12) separate from the at least one arm drive device (10) is provided, the at least one bracket (11) being adjustable relative to the frame (3) by means of the at least one bracket drive device.

Description

Technical Field

[0001] This invention relates to a bending head for architectural steel mesh, the bending head comprising a frame, at least one bending surface movable relative to the frame for bending at least one wire of the architectural steel mesh, at least one retaining member, at least one bending die, at least one bending arm, and at least one arm driving device. The at least one wire, when bent by means of the at least one bending surface, is supported on the retaining member. The bending die has at least partially a predetermined bending radius. The at least one bending surface is arranged on the bending arm. The at least one bending arm can be adjusted relative to the frame using the at least one arm driving device. The invention also relates to an apparatus for manufacturing architectural steel mesh, the apparatus comprising at least one such bending head, and a method for bending at least one wire of the architectural steel mesh by means of at least one such bending head. Background Technology

[0002] exist Figure 1 The diagram shows a bending head 101 according to the prior art. The bending head 101 includes a frame 103, a bending surface 104 movable relative to the frame 103 for bending wire of a building steel mesh, a retaining member 106, a bending die 107, a bending arm 109, and an arm drive device 110. The wire can be supported on the retaining member when it is bent by means of the bending surface 104. The bending surface 104 is arranged on the bending arm, and the bending arm 109 can be adjusted relative to the frame 103 by means of the arm drive device.

[0003] The retainer 106 is arranged on the pivot lever 116 and is pivotable relative to the frame 103.

[0004] Using the arm drive device 110, the bending arm 109 can rotate around the rotation axis 113. A control roller 114 is arranged on the end of the bending arm 109 opposite the bending surface 104, and the control roller rolls on the control profile 115 as the bending arm 109 moves. By controlling the roller 114 and the control profile 115, the movement of the bending surface 104 can be altered, causing the movement to deviate from a purely circular path and follow a preset bending trajectory.

[0005] Here, the bending trajectory is a compromise that must be adapted to the entire assembly of wires to be processed; however, this is disadvantageous because it limits the bending that can be performed using the bending head. For example, only bends with a fixed leg length can be performed.

[0006] Another disadvantage of the bending head is that the end of the bending arm 109 with the bending surface 104 requires a large amount of space to move when bending, which requires a relatively large spacing between adjacent wires that are welded together to form the building steel mesh.

[0007] If the construction steel mesh is arranged on the mesh platform above the bending head, the large movement space at the end of the bending arm 109 also requires a relatively large cut in the mesh platform through which the end of the bending arm 109 protrudes. This large mesh platform cut results in insufficient support for the construction steel mesh, leading to sagging in the area to be bent, which may degrade the bending accuracy. In the worst case, an excessively large cut can also cause the construction steel mesh to become stuck, potentially posing a danger to the operator.

[0008] Finally, another drawback of the existing bending head technology is that the bending head requires a large structural space, thus limiting the possibility of its application in equipment used to manufacture building steel mesh. Summary of the Invention

[0009] The objective of this invention is to at least partially eliminate the disadvantages of the prior art and to propose an improved bending head compared to the prior art, wherein the bending head, in particular, enables movement of the bending surface along a variable bending trajectory optimally adapted to the parameters of the bending to be performed, and has a small movement space and a small structural space. A further objective is to propose an apparatus for manufacturing building steel mesh (Baustahlmatte), the apparatus comprising at least one such improved bending head, and a method for bending at least one wire (Draht) of the building steel mesh using at least one such improved bending head.

[0010] To this end, the present invention proposes a bending head for building steel mesh, the bending head comprising a frame, at least one bending surface movable relative to the frame for bending at least one wire of the building steel mesh, at least one retaining member, at least one bending die, at least one bending arm, and at least one arm driving device. The at least one wire, when bent by means of the at least one bending surface, can be supported on the at least one retaining member. The at least one bending die has at least a partially predetermined bending radius. The at least one bending surface is arranged on the at least one bending arm. The at least one arm driving device can be adjusted relative to the frame using the at least one arm driving device. At least one support is provided, and the at least one bending arm is movably supported at and / or on the support. At least one support driving device, separate from the at least one arm driving device, is provided, and the at least one support can be adjusted relative to the frame using the at least one support driving device. The at least one bending arm is linearly movably supported at and / or on the at least one support. The present invention also proposes an apparatus for manufacturing building steel mesh, the apparatus comprising a bending head according to the invention, and a method for bending at least one wire of a building steel mesh by means of at least one bending head according to the invention.

[0011] The bending head according to the invention is therefore provided with at least one bracket, the at least one bending arm being movably supported at and / or on the bracket, wherein at least one bracket drive device separate from the at least one arm drive device is provided, by means of which the at least one bracket can be adjusted relative to the frame.

[0012] A bending head can be used to bend the individual wires of a structural steel mesh. Structural steel mesh is used to reinforce concrete components. The wires can be arranged, for example, on one side of the structural steel mesh, in a recess for a window or door, or inside the mesh. In this case, the wires to be bent typically serve as spacers to maintain spacing with other mesh layers. A bending head can be used to perform bends, for example, with first and second 90° turns and wire blocks with freely selectable leg lengths arranged therebetween. Bending with a single 180° turn can also be performed.

[0013] The basic principle of the bending head is that the bending trajectory can be variably designed by setting at least two independent driven devices, namely an arm drive device on one side and a support drive device separate from it on the other side. It is possible to adjust at least one support relative to the frame by means of at least one support drive device, and independently, at least one bending arm can be moved relative to at least one support and relative to the frame by means of at least one arm drive device, the bending arm being movably supported on and / or on at least one support.

[0014] Therefore, the bending trajectory performed by at least one bending surface can be optimally adapted to the parameters of the bending of at least one wire being performed. Parameters include, for example, the wire diameter.

[0015] The wire diameter can be, for example, between 6 and 16 mm. A bending die with a preset bending radius can be used depending on the wire diameter. Another parameter is the leg length between two successive sub-bends. This leg length can be freely selected through a variable bending trajectory. Relatively short leg lengths are also possible.

[0016] By setting at least two independent driven devices, it is also possible to reduce the amount of movement space required during bending of the area with the curved surface of the bending arm compared to the prior art. Therefore, it is possible to reduce the mesh cut required for the bending arm when using a mesh table. At the same time, the spacing maintaining the wire can be bent in the lower mesh of the solid wall basket by means of the bending head using a crossbar distance (e.g., 150 mm) that is reduced compared to the prior art.

[0017] Another advantage of the bending head is that its compact structure can be achieved by arranging at least one bending arm on and / or on at least one support. This further expands the application possibilities of the bending head in equipment used to manufacture architectural steel mesh.

[0018] According to a preferred embodiment, the at least one support is rotatably supported on the frame about a rotation axis. Preferably, the at least one curved arm is arranged at and / or on the at least one support such that the rotation axis intersects with the at least one curved arm. Thus, the curved head can be constructed very compactly, and therefore, the curved head can also be used under unfavorable positional conditions.

[0019] The specification stipulates that the support drive device includes at least one crank-connecting rod mechanism, preferably, the at least one crank-connecting rod mechanism having at least one crank, at least one lever and / or at least one connecting rod.

[0020] It has proven advantageous that at least one curved arm is preferably linearly and movably supported at and / or on at least one bracket, preferably with at least one bearing arranged on the at least one bracket, on which at least one guide for the at least one curved arm is constructed, and particularly preferably with two bearings arranged on the at least one bracket. Through these measures, individually or in combination, the length of the curved leg can be adapted as desired in a particularly simple manner.

[0021] In terms of the compact structure of the bending head, it has proven advantageous that at least one arm drive device has a drive shaft and at least one transmission mechanism by means of which the rotational motion of the drive shaft can be converted into the linear motion of at least one bending arm. Preferably, the at least one transmission mechanism has at least one gear and at least one rack. Particularly preferably, the at least one gear can be driven by the drive shaft, and the at least one rack is arranged on the at least one bending arm.

[0022] In this case, it is specified that the drive shaft of at least one arm drive device is rotatable about a rotation axis, at least one bracket is rotatably supported on the frame about the rotation axis, and the rotation axis of the drive shaft coincides with the rotation axis of at least one bracket. Preferably, the at least one arm drive device has at least one transmission mechanism with at least one gear, and the at least one gear is rotatable about the rotation axis of the drive shaft.

[0023] The specification stipulates that a control and / or adjustment device is provided, which allows the at least one arm drive device and the at least one support drive device to be operated in such a way that the at least one bending surface can perform a bending trajectory relative to the frame, the bending trajectory being adapted to a preset bending of the at least one wire, adapted to the wire diameter of the at least one wire, and / or adapted to a preset bending radius of the at least one bending die. This enables fully automatic operation of the bending head.

[0024] It has proven particularly advantageous that the bending head includes multiple, preferably more than three, and especially preferably at least five bending dies with different preset bending radii, wherein a bending die changing device is provided, by means of which the bending dies can move between a bending position and at least one support position. This enables automatic die changing, wherein one of the bending dies with a suitable bending radius is selected according to the diameter of the wire to be bent. Through die changing, wires of different diameters can be bent with the shortest possible bending leg without loss of time. If the bending head includes at least five bending dies, it can cover a wide range of wire diameters used according to standards.

[0025] In this case, according to an advantageous implementation that can be carried out individually or in combination with each other, the bending die changing device may be specified to have a star-shaped retainer with multiple arms, wherein one of the bending dies is arranged or can be arranged on each arm, and / or is rotatably supported about a rotation axis. Preferably, the at least one support is rotatably supported on a frame about a rotation axis, and the rotation axis of the bending die changing device coincides with the rotation axis of the at least one support, and / or at least one die changing drive device is provided, by which one of the bending dies can be moved from the bending position to the at least one support position, and vice versa.

[0026] It has been proven that the following are particularly advantageous:

[0027] - The at least one bracket is rotatably supported on the frame about a rotation axis, and / or

[0028] - The at least one arm drive device includes a drive shaft rotatable about a rotation axis, and / or

[0029] - Equipped with a bending die changing device that is rotatably supported around a rotation axis.

[0030] Furthermore, at least two, preferably all, of the established rotation axes coincide. This allows for a very compact structure of the bending head. Additionally, the forces generated during the operation of the bending head can be well received.

[0031] According to an advantageous embodiment, the assembly consisting of at least one support and at least one bending arm arranged at and / or on the at least one support is generally adjustable relative to the frame. Preferably, the assembly is adjustable at least in the vertical direction in the use position of the bending head, and / or at least one assembly drive device is provided, by which the assembly can be adjusted relative to the frame. Thus, it is possible to adapt the distance between the bending head and the mating retainer according to the wire diameter. Furthermore, assembly adjustment simplifies wire insertion, and if a bending die changing device is provided, it simplifies the replacement of the bending die.

[0032] It has proven advantageous that at least one retaining element is fixedly arranged on the frame, and / or at least one bending surface is constructed on the bending bolt, and / or at least one position detection unit is provided, which enables the detection of the position of at least one wire to be bent relative to the bending head. Preferably, the at least one position detection unit includes at least one laser.

[0033] In particular, it has proven advantageous to use a combination of at least one retaining element (fixed to the frame) and at least one support and at least one bent arm arranged at and / or on the support, for adjustment relative to the frame. On the one hand, the fixed arrangement allows for high stability of the retaining element. On the other hand, advantageous force flow can be achieved. If the adjustment is performed vertically, it only requires the ability to lift the weight of the assembly consisting of the support and the bent arm. The weight of the assembly consisting of the support and the bent arm additionally assists in retaining the retaining element during bending.

[0034] As mentioned at the beginning, protection is also claimed for an apparatus for manufacturing building steel mesh, the apparatus comprising at least one bending head according to the invention, preferably at least two bending heads.

[0035] A preferred embodiment of the device is characterized by having at least one mesh platform on which at least one building steel mesh can be positioned, wherein the at least one mesh platform has at least one recess in which at least one mating retainer of the at least one bending head, the at least one bending surface, and the at least one bending die are arranged or can be arranged to bend at least one wire of the at least one building steel mesh. Preferably, the at least one recess has a maximum width of 35, which is 300 mm, and particularly preferably 250 mm.

[0036] Alternatively or additionally, a base frame may be provided on which at least one bending head is arranged. Preferably, the at least one bending head is rotatably arranged relative to the base frame. Particularly preferably, at least one bending head rotation driver is provided, by which the at least one bending head can be rotated relative to the base frame. And / or the at least one bending head is movably arranged relative to the base frame. Particularly preferably, at least one bending head movement driver is provided, by which the at least one bending head can be moved relative to the base frame. And / or the device has at least two bending heads, wherein the at least two bending heads are arranged or can be arranged at two opposite ends of the base frame.

[0037] According to another advantageous embodiment, either in combination or individually, the equipment is specified to include at least one wire library, preferably having at least one unwinding device for the coil, and / or including at least one straightening machine for straightening at least one wire, and / or including at least one welding device for welding intersecting longitudinal and transverse wires into at least one building steel mesh, and / or including at least one beam bending device for simultaneously bending a row of parallel wires, and / or including at least one transport device for transporting at least one building steel mesh, preferably the at least one transport device being configured as a chain conveyor.

[0038] Finally, protection is claimed for a method of bending at least one wire of a building steel mesh using at least one bending head according to the invention, comprising the following method steps:

[0039] - At least one support is adjusted relative to the frame by means of at least one support drive device, preferably rotating about a rotation axis, and

[0040] - At least one curved arm is adjusted, preferably moved, particularly preferably linearly moved, relative to the frame and relative to the at least one support by means of at least one arm drive device.

[0041] According to a preferred embodiment of the method, the at least one arm drive device and the at least one bracket drive device are operated by means of a control and / or adjustment device in such a way that the at least one bending surface performs a bending trajectory relative to the frame, the bending trajectory being adapted to a preset bending of the at least one wire, adapted to the wire diameter of the at least one wire, and / or adapted to a preset bending radius of the at least one bending die.

[0042] In cases where the bending head comprises multiple, preferably more than three, and particularly preferably at least five bending dies with different preset bending radii, it is specified that, in a further method step, at least one of the bending dies is moved between a bending position and at least one support position by means of a bending die changing device, preferably, the at least one bending die is rotated at least partially relative to the frame.

[0043] Alternatively or additionally, it may be specified that the group consisting of the at least one support and the at least one curved arm arranged at and / or on the at least one support is generally adjusted relative to the frame in a further method step, preferably at least in the vertical direction of the use position of the curved head. Attached Figure Description

[0044] Other details and advantages of the invention will now be described in more detail with reference to the accompanying drawings. Here, it is shown that:

[0045] Figure 1 A bending head according to the prior art is shown in a schematic side view;

[0046] Figure 2 A preferred embodiment of the bending head according to the invention is shown in a schematic cross-sectional view from the side.

[0047] Figure 3 A preferred embodiment of the bending head is shown in a cross-sectional view, which is also shown from the side, wherein a series of positions through which the bending arm passes are illustrated in the figure.

[0048] Figure 4 A preferred embodiment of the bending head is shown in a cross-sectional view, which is also shown from the side, wherein the mesh platform and the cuts of the building steel mesh arranged on the mesh platform are additionally shown.

[0049] Figure 5a and Figure 5b Two different schematic perspective views illustrate a preferred embodiment of the bending head;

[0050] Figure 5c A preferred embodiment of the bending head is shown in a further schematic perspective view; and

[0051] Figure 6 A preferred embodiment of the equipment for manufacturing building steel mesh is shown in a schematic top view from above. Detailed Implementation

[0052] The bending head according to the prior art has been described at the beginning of the instruction manual. Figure 1 .

[0053] Figure 2 A preferred embodiment of the bending head 1 for the building steel mesh 2 according to the invention is shown (see also...). Figure 4 The bending head includes a frame 3, a bending surface 4 movable relative to the frame 3 for bending at least one wire 5 of the building steel mesh 2, a retaining member 6, and a plurality of bending dies 7. At least one wire 5 can be supported on the retaining member when bent by means of the bending surface 4. Each bending die has at least partially a predetermined bending radius 8. In a specific embodiment, a total of five bending dies 7 are provided. However, a different number of bending dies 7 may also be used.

[0054] The bending head 1 has a bending arm 9 and an arm drive device 10, on which a bending surface 4 is arranged, and the bending arm 9 can be adjusted relative to the frame 3 by means of the arm drive device.

[0055] A bracket 11 is provided, on which the bending arm 9 is movably supported. A bracket drive device 12, separate from the arm drive device 10, is provided, which allows the bracket 11 to be adjusted relative to the frame 3.

[0056] The support 11 is rotatably supported on the frame 3 about a rotation axis 13, wherein the bending arm 9 is arranged on the support 11 such that the rotation axis 13 intersects the bending arm 9. This achieves an extremely compact structure for the bending head 1.

[0057] The support drive device 12 includes a crank-connecting rod mechanism, wherein the crank-connecting rod mechanism has a crank 14, a lever 15, and a connecting rod 16. The connecting rod 16 is arranged between the crank 14 and the lever 15 connected to the support 11, and the crank is movable in the direction of the double arrow 66.

[0058] The curved arm 9 is linearly movable and supported on the bracket 11, wherein two bearings 17 are arranged on the bracket 11, and guides for the curved arm 9 are respectively constructed on the two bearings. In the indicated position on the bracket 11, the curved arm 9 can move relative to the bracket 11 and relative to the frame 3 in the direction of the double arrow 67. Figure 2 Only the smaller sub-component of the frame at the retaining member 6 is shown. In this movement, the distance from the bending surface 4 to the rotation point 13 is changed. This allows the bending to be altered in a particularly advantageous manner (see...). Figure 4 The leg length is 44.

[0059] The arm drive device 10 has a drive shaft 19 and a transmission mechanism, by which the rotational motion of the drive shaft 19 can be converted into the linear motion of the curved arm 9. The transmission mechanism can be implemented differently. In the specific example shown, the transmission mechanism has a gear 20 and a rack 21, wherein the gear 20 can be driven by the drive shaft 19 and the rack 20 is arranged on the curved arm 9. If the gear 20 is in rotation, the rack 21 and the curved arm 9, which is kinetically coupled thereto, move linearly.

[0060] The arm drive device 10 and the support drive device 12 are configured to have absolute value transmitters.

[0061] The settings are in Figure 2 The control and / or adjustment device 22 is schematically represented by a dashed rectangle. Using the control and / or adjustment device 22, the arm drive device 10 and the support drive device 12 can be manipulated such that the bending surface 4 can perform a bending trajectory 24 relative to the frame 3, which is adapted to a preset bend of at least one wire 5, a wire diameter 23 of at least one wire 5, and / or a preset bending radius 8 of at least one bending die 7. The control and / or adjustment device 22 can be connected to the support drive device 12 and the arm drive device 10 via one or more signal lines 40, which may also be wirelessly constructed.

[0062] By combining the linear motion of the bending arm 9 with the angular motion of the support 11, it is possible to move the bending surface 4 to any arbitrary point.

[0063] By constructing a bending machine with a turntable that pivots and travels via gears through the center of the turntable for bending arms, the bending machine is very compact and can also be used in unfavorable positional conditions.

[0064] It has been proven advantageous that the control and / or adjustment device 22 is designed to enable a very short cycle time for achieving bending.

[0065] The bending head 1 in the illustrated embodiment can operate fully automatically.

[0066] The bending head 1 includes multiple, specifically five, bending dies 7 with different preset bending radii 8. A bending die changing device 25 is provided, by which the bending dies 7 can move between a bending position and at least one support position. When the bending die 7 is in the bending position, it is generally arranged between the retaining member 6 and the bending surface 4. The opposite position (in which the bending die 7 does not participate in the bending process) is the support position. Figure 2 In the middle, the uppermost bending die 7 is arranged in the bending position and the remaining bending dies 7 are arranged in the support position.

[0067] The bending die changing device 25 has a star-shaped holding portion 26 with a plurality of arms 27, wherein one of the bending dies 7 is arranged or may be arranged on each arm 27. In the specific case shown, the holding portion 26 has five arms 27, and a bending die 7 is arranged on the free end of each of the five arms.

[0068] The bending die changing device 25 is rotatably supported about the rotation axis 13, wherein the rotation axis 13 of the bending die changing device 25 coincides with the rotation axis 13 of the support 11.

[0069] A mold changing drive device 28 is provided (see...) Figure 5b With the aid of the die changing drive, one of the bending dies 7 can move from a bending position to at least one support position, and vice versa.

[0070] With the aid of the bending die changing device 25, the bending die can be changed according to the requirements of the wire 5 to be bent and the wire diameter 23 (see Figure 4 Replace with a suitable bending die 7.

[0071] The bending die 7 can have a structured surface within a preset bending radius 8 to increase friction with the wire 5. For example, the structured surface is at least partially hook-shaped in cross-section.

[0072] The retaining element 6 is fixedly arranged on the frame 3.

[0073] In the case shown, the curved surface 4 is constructed on the curved bolt 31.

[0074] The bending head 1 can be used in a method for bending at least one wire 5 of a building steel mesh 2, wherein the method includes the following steps:

[0075] - The bracket 11 is adjusted relative to the frame 3 by means of the bracket drive device 12, rotating about the rotation axis 13 in a specific embodiment, and

[0076] - The bending arm 9 is adjusted relative to the frame 3 and relative to the support 11 by means of the arm drive device 10, and in a particular embodiment it moves linearly.

[0077] In another method step, at least one bending die 7 moves between a bending position and at least one support position by means of a bending die changing device 25, wherein, in a particular embodiment, at least one bending die 7 rotates at least partially relative to the frame 3.

[0078] Figure 3A preferred embodiment of the bending head 1 is shown in a cross-sectional view, which is also shown from the side, wherein a series of positions through which the bending arm 1 passes are illustrated in the figure, exemplarily, during the bending of the wire 5.

[0079] The arm drive unit 10 and the support drive unit 12 are operated by means of a control and / or adjustment device 22 in such a way that the bending surface 4 performs a bending trajectory 24 relative to the frame 3, the bending trajectory being adapted to a predetermined bend of at least one wire 5, to a wire diameter 23 of at least one wire 5, and / or to a predetermined bending radius 8 of at least one bending die 7. In the case specifically shown, for example, the bending surface 4 or the bending bolt 31 is guided on the bending trajectory 24 around the substantially circular shape of the bending die 7.

[0080] exist Figure 3 The larger portion of frame 3 is shown. It is specified that the assembly consisting of bracket 11 and curved arms 9 arranged on bracket 11 is generally adjustable relative to frame 3, wherein this assembly can be adjusted in the vertical direction 29 from the operating position of curved head 1. An assembly drive device 30 is provided (see [link to documentation]). Figure 5b The group can be adjusted relative to the frame 3 by means of the group drive device.

[0081] Frame 3 may have an opening 45 within which the assembly is adjustable. The opening 45 may be constructed, for example, as an elongated hole and / or have end stops that define the maximum position of the assembly relative to frame 3.

[0082] The bending head 1 can be used in a method for bending at least one wire 5 of a building steel mesh 2. It is specified here that, in one method step, the assembly consisting of a support 11 and a bending arm 9 arranged on the support 11 is adjusted integrally with respect to the frame 3, and specifically, at least in the vertical direction 29 of the use position of the bending head 1. This method step allows for adjustment even in the case of a restricted mesh cut in the mesh platform 33 (see...). Figure 4 The replacement of the die and / or insertion of the wire 5 becomes easy. In addition, the distance between the bending head 1 and the mating retainer 6 can be optimally adapted to the wire diameter 23 of the wire 5 to be bent.

[0083] Figure 4 A preferred embodiment of the bending head 1 is shown in a schematic cross-sectional view from the side, wherein the mesh platform 33 and the cuts of the construction steel mesh 2 arranged on the mesh platform are additionally shown.

[0084] Therefore, a mesh platform 33 is provided, on which at least one building steel mesh 2 can be positioned. The mesh platform 33 has at least one recess in which the fitting retainer 6 of the bending head 1, the bending surface 4 and the at least one bending die 7 are arranged or can be arranged, so as to bend at least one wire 5 of the at least one building steel mesh 2.

[0085] The structure of the bending head 1 allows at least one recess to be designed to be relatively small compared to existing technologies. For example, the recess can be specified to have a maximum width of 35 mm, particularly preferably 250 mm.

[0086] The cutouts in the structural steel mesh 2 reveal multiple transverse wires 42 arranged side-by-side. These transverse wires are arranged within the first mesh layer 41. The distance 43 between the transverse wires 42 can be, for example, 150 mm. This distance 43 is sufficient for all bending processes to be performed using the bending head 1.

[0087] In the specific example shown, the structural steel mesh 2 includes wire 5, which is bent into two sub-bends of 90° each by means of a bending head 1. The leg length 44 between the two sub-bends is, for example, 110 mm. The second mesh layer can be fastened to the upwardly bent sub-section of the wire 5. In this case, the wire 5 serves as a spacer for the second mesh layer.

[0088] During the bending process, the wire 5 is pressed upward along the vertical direction 29 by the bending surface 4 of the bending arm 9 and bends around the bending die 7. The wire 5 is held in place by a fixed retaining member 6. Since the bending die changing device 25 can be adjusted in the vertical direction 29, the lower edge of the die can be adapted to the wire diameter 33, which can be, for example, 8 mm.

[0089] The fixed retaining element 6 and the adjustable bending die changing device 25 provide the additional advantage that the weight of the assembly consisting of the bending arm 9 and the support 11 assists in retaining the assembly during bending, and the assembly drive device 30 only needs to hold the weight of the assembly. The assembly drive device 30 does not need to receive force from bending.

[0090] Figure 5a , 5b The preferred embodiment of the bending head 1 is shown in a perspective view with different schematic diagrams as shown in 5c.

[0091] A base frame 36 is provided, on which a bending head 1 is arranged, wherein the bending head 1 is rotatably arranged relative to the base frame 36. A bending head rotation driver 37 is provided, by means of which the bending head 1 can be rotated relative to the base frame 36.

[0092] The bending head 1 is movably arranged relative to the base frame 36, wherein a bending head movement driver 38 is provided, by means of which the bending head 1 can move relative to the base frame 36.

[0093] The movable arrangement can be achieved by means of guide 55, as shown in the example. Teeth 56 can be constructed on guide 55, in which the driveable gear of the bending head movement driver 38 is engaged.

[0094] The frame 3 of the bending head 1 is arranged on the base 54, which may be constructed, for example, in a disc shape.

[0095] Additional bending heads 1 can also be arranged on the base frame 36, so that a total of two bending heads 1 can be arranged or can be arranged on two opposite ends 39 of the base frame 36.

[0096] like Figure 5c As shown, a position detection unit 18 can be provided, which can detect the position of at least one wire 5 to be bent relative to the bending head 1. In the illustrated case, the position detection unit 18 includes a laser 34. The laser 34 can emit a laser beam 58, which, in the specific case, is substantially parallel to the bending arm 9 and extends in the plane of the wire.

[0097] The bending die 7 can be arranged on the retaining plate 57, wherein the retaining plate 57 can be detachably connected to the star-shaped retaining part 26. In this way, the bending die 7 can be replaced with a non-reserved bending die 7 having another preset bending radius 8 by a small amount of manual operation when worn or when needed.

[0098] To adjust the assembly consisting of the bending arm 9 and the bracket 11, the assembly drive unit 30 may have a gear 59 and a guide 60.

[0099] The die changing drive 28 may have a gear 61.

[0100] Figure 6 A preferred embodiment of the apparatus 32 for manufacturing the building steel mesh 2 is shown.

[0101] The device 32 includes a wire library 46, wherein the wire library 46 has an unwinding device 47 for multiple rolls 48, on which wires 5 with different characteristics, such as different wire diameters 23, can be stored.

[0102] The equipment 32 includes a straightener 49 for straightening at least one wire 5 unwound from the roll 48.

[0103] The equipment 32 includes a welding device 50 for welding intersecting longitudinal wires 51 and transverse wires 42 into at least one building steel mesh 2.

[0104] As can be specified in the illustrated embodiment, the longitudinal wire 51 is conveyed from the straightener 49 toward the welding device 50 by means of a platform 62 guided on a track 69 in the direction of the double arrow 69.

[0105] The transverse wire 42 can be fed to the welding device 50 in the transverse direction 65, for example.

[0106] The construction steel mesh 2, welded together by the welding device 50, can continue to be conveyed along the cross platform 70 in the transverse direction 65. The bending station 71 extends along one side of the cross platform 70 in the longitudinal direction 64. The bending station 71 includes two bending heads 1, which can be adjusted according to… Figures 2 to 5c The embodiments shown are used for implementation.

[0107] In addition, a beam bending device 52 for simultaneously bending a series of parallel-arranged wires 5 is provided adjacent to the bending head 1.

[0108] A transport device 53 for transporting at least one building steel mesh 2 is arranged on an opposite side of the platform 70, wherein the transport device 53 may be configured as, for example, a chain conveyor. The processed building steel mesh 2 may be manually removed from the transport device 53, for example.

[0109] A mesh grabber 63 can be set up, which can be used to move the building steel mesh 2 between the transverse platform 70, the bending station 71 and the transport device 53.

Claims

1. A bending head (1) for a building steel mesh (2), the bending head comprising a frame (3), at least one bending surface (4) movable relative to the frame (3) for bending at least one wire (5) of the building steel mesh (2), at least one retaining member (6), at least one bending die (7), at least one bending arm (9), and at least one arm drive device (10), wherein the at least one wire (5) is supported on the at least one retaining member when bent by means of the at least one bending surface (4), the at least one bending die having at least partially a predetermined bending radius (8), the at least one bending surface (4) being arranged on the at least one bending arm, and the at least one bending arm (9) being adjustable relative to the frame (3) by means of the at least one arm drive device, characterized in that, At least one support (11) is provided, and at least one curved arm (9) is movably supported on the support. At least one support drive (12) is provided separately from the at least one arm drive (10). The at least one support drive can rotate the at least one support (11) relative to the frame (3). The at least one curved arm (9) is linearly supported on the at least one support (11). The distance from the curved surface (4) to the rotation point is changed by the linear movement, thereby changing the length of the curved leg.

2. The bending head (1) according to claim 1, wherein, The at least one support (11) is rotatably supported on the frame (3) about a first axis of rotation.

3. The bending head (1) according to claim 1 or 2, wherein, The bracket drive device (12) includes at least one crank-connecting rod mechanism.

4. The bending head (1) according to claim 1 or 2, wherein, At least one bearing (17) is arranged on the at least one bracket (11), and at least one guide for the at least one curved arm (9) is constructed on the at least one bearing.

5. The bending head (1) according to claim 1 or 2, wherein, The at least one arm drive device (10) has a drive shaft (19) and at least one transmission mechanism, which can convert the rotational motion of the drive shaft (19) into the linear motion of the at least one curved arm (9).

6. The bending head (1) according to claim 5, wherein, The drive shaft (19) of the at least one arm drive device (10) is rotatable about a second rotation axis, the at least one bracket (11) is rotatably supported on the frame (3) about a first rotation axis, and the second rotation axis of the drive shaft (19) coincides with the first rotation axis of the at least one bracket (11).

7. The bending head (1) according to claim 1 or 2, wherein, A control and / or adjustment device (22) is provided, which allows the control and / or adjustment device to manipulate the at least one arm drive device (10) and the at least one bracket drive device (12) so that the at least one bending surface (4) can perform a bending trajectory (24) relative to the frame (3), the bending trajectory being adapted to a preset bending of the at least one wire (5), adapted to the wire diameter (23) of the at least one wire (5), and / or adapted to a preset bending radius (8) of the at least one bending die (7).

8. The bending head (1) according to claim 1 or 2, wherein, The bending head (1) includes a plurality of bending dies (7) with different preset bending radii (8), wherein a bending die changing device (25) is provided, which enables each bending die (7) to move between a bending position and at least one support position.

9. The bending head (1) according to claim 8, wherein, The bending die replacement device (25): - A star-shaped retaining portion (26) having multiple arms (27), wherein one of the bending dies (7) can be arranged on each arm (27), and / or - Capable of being rotatably supported about a third axis of rotation, and / or - It is provided with at least one die changing drive device (28), which can move one of the bending dies (7) from the bending position to the at least one support position, and can move the bending die from the at least one support position to the bending position.

10. The bending head (1) according to claim 1 or 2, wherein, - The at least one bracket (11) is rotatably supported on the frame (3) about a first axis of rotation, and / or - The at least one arm drive device (10) includes a drive shaft (19) rotatable about a second rotation axis, and / or - A bending die changing device (25) is provided, which is rotatably supported about a third axis of rotation. Furthermore, at least two of the first, second, and third rotation axes are coincident.

11. The bending head (1) according to claim 1 or 2, wherein, The assembly consisting of the at least one bracket (11) and the at least one curved arm (9) can be adjusted relative to the frame (3) in a general manner, with the at least one curved arm arranged at the at least one bracket (11).

12. The bending head (1) according to claim 1 or 2, wherein, - The at least one mating retainer (6) is fixedly arranged on the frame (3), and / or - The at least one curved surface (4) is constructed on a curved bolt (31), the curved bolt being arranged at the at least one curved arm, and / or - It is provided with at least one position detection unit (18) that can detect the position of at least one wire (5) to be bent relative to the bending head (1).

13. The bending head (1) according to claim 2, wherein, The at least one curved arm (9) is arranged at the at least one bracket (11) such that the first axis of rotation intersects the at least one curved arm (9).

14. The bending head (1) according to claim 3, wherein, The at least one crank-connecting rod mechanism has at least one crank (14), at least one lever (15) and / or at least one connecting rod (16).

15. The bending head (1) according to claim 4, wherein, Two bearings (17) are arranged on the at least one bracket (11).

16. The bending head (1) according to claim 5, wherein, The at least one transmission mechanism has at least one gear (20) and at least one rack (21).

17. The bending head (1) according to claim 16, wherein, The at least one gear (20) can be driven by a drive shaft (19), and the at least one rack (21) is arranged on the at least one curved arm (9).

18. The bending head (1) according to claim 6, wherein, The at least one arm drive device (10) has at least one transmission mechanism with at least one gear (20), and the at least one gear (20) is rotatable about a second rotation axis of the drive shaft (19).

19. The bending head (1) according to claim 8, wherein, The bending head (1) includes more than three bending dies (7) with different preset bending radii (8).

20. The bending head (1) according to claim 8, wherein, The bending head (1) includes at least five bending dies (7) with different preset bending radii (8).

21. The bending head (1) according to claim 9, wherein, The at least one bracket (11) is rotatably supported on the frame (3) about a first axis of rotation, and the third axis of rotation of the bending die changing device (25) coincides with the first axis of rotation of the at least one bracket (11).

22. The bending head (1) according to claim 10, wherein, All rotation axes in the first, second, and third rotation axes are coincident.

23. The bending head (1) according to claim 11, wherein, - The assembly can be adjusted at least in the vertical direction (29) of the bending head (1) in its position of use, and / or - It is provided with at least one group drive device (30) that can adjust the group relative to the frame (3).

24. The bending head (1) according to claim 12, wherein, The at least one position detection unit (18) includes at least one laser (34).

25. An apparatus (32) for manufacturing a building steel mesh (2), the apparatus comprising at least one bending head (1) according to any one of claims 1 to 24.

26. The device (32) according to claim 25, wherein, At least one mesh platform (33) is provided, and at least one building steel mesh (2) can be positioned on the mesh platform, wherein the at least one mesh platform (33) has at least one recess in which at least one fitting retainer (6), at least one bending surface (4) and at least one bending die (7) of the at least one bending head (1) can be arranged so as to bend at least one wire (5) of the at least one building steel mesh (2).

27. The device (32) according to claim 25 or 26, wherein, A base frame (36) is provided, on which at least one bending head (1) is arranged.

28. The device (32) according to claim 25 or 26, wherein, The device (32): - Includes at least one wire library (46), and / or - Includes at least one straightening machine (49) for straightening at least one wire (5), and / or - Includes at least one welding device (50) for welding intersecting longitudinal wires (51) and transverse wires (42) into at least one building steel mesh (2), and / or - Includes at least one beam bending device (52) for simultaneously bending a row of side-by-side wires (5), and / or - Includes at least one transport device (53) for transporting at least one building steel mesh (2).

29. The device (32) according to claim 25, wherein, The device includes at least two bending heads (1) according to any one of claims 1 to 24.

30. The device (32) according to claim 26, wherein, The maximum width (35) of the at least one recess is 300 mm.

31. The device (32) according to claim 26, wherein, The maximum width (35) of the at least one recess is 250 mm.

32. The device (32) according to claim 27, wherein, - The at least one bending head (1) is rotatably arranged relative to the base frame (36), and / or - The at least one bending head (1) can be movably arranged relative to the base frame (36), and / or - The device (32) has at least two bending heads (1), wherein the at least two bending heads (1) can be arranged at two opposite ends (39) of the base frame (36).

33. The device (32) according to claim 32, wherein, The device is provided with at least one bending head rotary driver (37) which enables the at least one bending head (1) to rotate relative to the base frame (36).

34. The device (32) according to claim 32, wherein, The device is provided with at least one bending head moving drive (38) which enables the at least one bending head (1) to be moved relative to the base frame (36).

35. The device (32) according to claim 28, wherein, The at least one wire library (46) has at least one unwinding device (47) for the roll (48).

36. The device (32) according to claim 28, wherein, The at least one transport device (53) is constructed as a chain conveyor.

37. A method for bending at least one wire (5) of a building steel mesh (2) by means of at least one bending head (1), said at least one bending head being a bending head according to any one of claims 1 to 24, the method comprising the following method steps: - The at least one bracket (11) is rotated relative to the frame (3) by means of the at least one bracket drive device (12), and - The at least one curved arm (9) is linearly moved relative to the frame (3) and relative to the at least one support (11) by means of the at least one arm drive device (10).

38. The method according to claim 37, wherein, The at least one arm drive device (10) and the at least one bracket drive device (12) are operated by means of a control and / or adjustment device (22) such that the at least one bending surface (4) performs a bending trajectory (24) relative to the frame (3), the bending trajectory being adapted to a preset bending of the at least one wire (5), adapted to the wire diameter (23) of the at least one wire (5) and / or adapted to a preset bending radius (8) of the at least one bending die (7).

39. The method according to claim 37 or 38, wherein, The bending head (1) includes a plurality of bending dies (7) with different preset bending radii (8), wherein, in a further method step, at least one of the bending dies (7) is moved between a bending position and at least one support position by means of a bending die changing device (25).

40. The method according to claim 37 or 38, wherein, In another method step, the group consisting of the at least one support (11) and the at least one curved arm (9) is adjusted generally relative to the frame (3), the at least one curved arm being arranged at the at least one support (11).

41. The method according to claim 37, wherein, The at least one support (11) is rotated about a first axis of rotation relative to the frame (3).

42. The method according to claim 39, wherein, The bending head (1) includes more than three bending dies (7) with different preset bending radii (8).

43. The method according to claim 39, wherein, The bending head (1) includes at least five bending dies (7) with different preset bending radii (8).

44. The method according to claim 39, wherein, The at least one bending die (7) is rotated at least partially relative to the frame (3).

45. The method according to claim 40, wherein, The assembly is adjusted at least in the vertical direction (29) of the use position of the bending head (1).

Images