BENDING HEAD FOR WELDED WIRE MESH

Abstract

A bending head for welded wire mesh includes a frame, a bending face to be moved relative to the frame for bending a wire in a welded wire mesh, a counterholder on which the wire can be braced during bending by the bending face, a bending die which, at least in part, has a predefined bending radius, a bending arm on which the bending face is arranged, and an arm drive device with which the bending arm can be adjusted relative to the frame. A support is provided at and/or on which the bending arm is movably mounted. A support drive device, with which the support can be adjusted relative to the frame and which is separate from the arm drive device, is provided.

Claims

1. A bending head for welded wire mesh, comprising: a frame, at least one bending face to be moved relative to the frame for bending at least one wire in a welded wire mesh, at least one counterholder, on which the at least one wire can be braced during bending by the at least one bending face, at least one bending die, which, at least in part, has a predefined bending radius, at least one bending arm, on which the at least one bending face is arranged, and at least one arm drive device, with which the at least one bending arm can be adjusted relative to the frame, wherein at least one support is provided, at and/or on which the at least one bending arm is movably mounted, wherein at least one support drive device, which is separate from the at least one arm drive device and with which the at least one support can be adjusted relative to the frame, is provided, and wherein the at least one bending arm is mounted linearly displaceably at and/or on the at least one support.

2. The bending head according to claim 1, wherein the at least one support is mounted on the frame rotatably about an axis of rotation, preferably wherein the at least one bending arm is arranged at and/or on the at least one support such that the axis of rotation intersects the at least one bending arm.

3. The bending head according to claim 1, wherein the support drive device comprises at least one slider crank mechanism, preferably wherein the at least one slider crank mechanism has at least one crank, at least one lever, and/or at least one connecting rod.

4. The bending head according to claim 3, wherein at least one bearing is arranged on the at least one support, on which at least one guide for the at least one bending arm is formed, particularly preferably wherein two bearings are arranged on the at least one support.

5. The bending head according to claim 1, wherein the at least one arm drive device has a drive shaft and at least one gearing mechanism, with which a rotational movement of the drive shaft can be converted to a linear movement of the at least one bending arm, preferably wherein the at least one gearing mechanism has at least one gear wheel and at least one gear rack, particularly preferably wherein the at least one gear wheel can be driven by the drive shaft and the at least one gear rack is arranged on the at least one bending arm.

6. The bending head according to claim 5, wherein the drive shaft of the at least one arm drive device can be rotated about an axis of rotation, the at least one support is mounted on the frame rotatably about an axis of rotation and the axis of rotation of the drive shaft coincides with the axis of rotation of the at least one support, preferably wherein the at least one arm drive device has at least one gearing mechanism with at least one gear wheel and the at least one gear wheel can be rotated about the axis of rotation of the drive shaft.

7. The bending head according to claim 1, wherein a control and/or regulation device is provided, with which the at least one arm drive device and the at least one support drive device can be actuated such that the at least one bending face can perform a bending trajectory relative to the frame adapted to a predefined bend of the at least one wire, to a wire diameter of the at least one wire, and/or to a predefined bending radius of the at least one bending die.

8. The bending head according to claim 1, wherein the bending head comprises several, preferably more than three, particularly preferably at least five, bending dies with different predefined bending radii, wherein a bending die changing device is provided, with which the bending dies can be moved between a bending position and at least one storage position.

9. The bending head according to claim 8, wherein the bending die changing device: has a star-shaped holder with several arms, wherein one of the bending dies is or can be arranged in each case on each arm, and/or is mounted rotatably about an axis of rotation, preferably wherein the at least one support is mounted on the frame rotatably about an axis of rotation and the axis of rotation of the bending die changing device coincides with the axis of rotation of the at least one support, and/or at least one die changing drive device is provided, with which one of the bending dies can be moved from the bending position into the at least one storage position, and vice versa.

10. The bending head according to claim 1, wherein: the at least one support is mounted on the frame rotatably about an axis of rotation, and/or the at least one arm drive device comprises a drive shaft which can be rotated about an axis of rotation, and/or a bending die changing device, which is mounted rotatably about an axis of rotation, is provided, and wherein at least two, preferably all, of the axes of rotation provided coincide.

11. The bending head according to claim 1, wherein a group consisting of the at least one support and the at least one bending arm arranged at and/or on the at least one support is mounted as a whole adjustably relative to the frame, preferably wherein: the group can be adjusted at least in a vertical direction in the position of use of the bending head, and/or at least one group drive device is provided, with which the group can be adjusted relative to the frame.

12. The bending head according to claim 1, wherein: the at least one counterholder is arranged stationary on the frame, and/or the at least one bending face is formed on a bending pin, and/or at least one position-detecting unit is provided, with which the position of at least one wire to be bent relative to the bending head can be detected, preferably wherein the at least one position-detecting unit comprises at least one laser.

13. The system for producing welded wire mesh, comprising at least one bending head, preferably at least two bending heads, according to claim 1.

14. The system according to claim 13, further comprising at least one mesh table on which at least one welded wire mesh can be positioned, wherein the at least one mesh table has at least one opening, in which the at least one counterholder, the at least one bending face and the at least one bending die of the at least one bending head are or can be arranged, in order to bend at least one wire in the at least one welded wire mesh, preferably wherein the at least one opening has a maximum width of 300 mm, particularly preferably of 250 mm.

15. The system according to claim 13, further comprising a base frame on which the at least one bending head is arranged, preferably wherein: the at least one bending head is arranged rotatably relative to the base frame, particularly preferably wherein at least one bending head rotary drive is provided, with which the at least one bending head can be rotated relative to the base frame, and/or the at least one bending head is arranged displaceably relative to the base frame, particularly preferably wherein at least one bending head displacement drive, with which the at least one bending head can be displaced relative to the base frame, is provided, and/or the system has at least two bending heads, wherein the at least two bending heads are or can be arranged on two opposite ends of the base frame.

16. The system according to claim 13, wherein the system comprises at least one of: a wire magazine, preferably wherein the at least one wire magazine has at least one unwinding device for a reel, a straightening machine for straightening at least one wire, a welding device for welding intersecting longitudinal wires and transverse wires together to form at least one welded wire mesh, a beam bending device for simultaneously bending a series of wires arranged next to each other, and a transport device for transporting at least one welded wire mesh away, preferably wherein the at least one transport device is formed as a chain conveyor.

17. The method for bending at least one wire in a welded wire mesh by the bending head according to claim 1, comprising: adjusting the at least one support, preferably by rotating about an axis of rotation, relative to the frame by means of the at least one support drive device, and adjusting the bending arm, preferably by displacing, and particularly preferably linearly displacing, relative to the frame and relative to the at least one support by means of the at least one arm drive device.

18. The method according to claim 17, wherein the at least one arm drive device and the at least one support drive device are actuated by means of a control and/or regulation device such that the at least one bending face performs a bending trajectory relative to the frame adapted to a predefined bend of the at least one wire, to a wire diameter of the at least one wire, and/or to a predefined bending radius of the at least one bending die.

19. The method according to claim 17, wherein the bending head comprises several, preferably more than three, particularly preferably at least five, bending dies with different predefined bending radii, wherein in a further method step at least one of the bending dies is moved between a bending position and at least one storage position by means of a bending die changing device, preferably wherein the at least one bending die is rotated relative to the frame at least in part.

20. The method according to claim 17, wherein a group consisting of the at least one support and the at least one bending arm arranged at and/or on the at least one support is adjusted as a whole relative to the frame in a further method step, preferably at least in a vertical direction in the position of use of the bending head.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Further details and advantages of the invention are explained in more detail below with the aid of the description and reference to the drawings, in which:

[0042] FIG. 1 shows a bending head according to the state of the art in a schematically represented side view,

[0043] FIG. 2 shows a preferred embodiment according to the invention of a bending head in a schematically represented cross-sectional view from the side,

[0044] FIG. 3 shows the preferred embodiment of the bending head in a further schematically represented cross-sectional view from the side, wherein a series of positions of the bending arm passed through one after another is marked by way of example in the figure,

[0045] FIG. 4 shows the preferred embodiment of the bending head in a further schematically represented cross-sectional view from the side, wherein a mesh table and a cutout in a welded wire mesh arranged thereon are additionally represented,

[0046] FIGS. 5a, 5b show the preferred embodiment of the bending head in two different schematically represented perspective views,

[0047] FIG. 5c shows the preferred embodiment of the bending head in a further schematically represented perspective view, and

[0048] FIG. 6 shows a preferred embodiment of a system for producing welded wire mesh in a schematically represented top view from above.

DETAILED DESCRIPTION OF THE INVENTION

[0049] FIG. 1, which shows a bending head according to the state of the art, has already been described in the introduction to the description.

[0050] FIG. 2 shows a preferred embodiment example according to the invention of a bending head 1 for welded wire mesh 2 (cf. also FIG. 4), comprising a frame 3, a bending face 4, which can be moved relative to the frame 3, for bending at least one wire 5 in a welded wire mesh 2, a counterholder 6, on which the at least one wire 5 can be braced during bending by means of the bending face 4, and several bending dies 7, which in each case, at least in part, have a predefined bending radius 8. In the specific embodiment example, a total of five bending dies 7 are provided. However, a number of bending dies 7 deviating therefrom can also be used.

[0051] The bending head 1 has a bending arm 9, on which the bending face 4 is arranged, and an arm drive device 10, with which the bending arm 9 can be adjusted relative to the frame 3.

[0052] A support 11 is provided, on which the bending arm 9 is movably mounted, wherein a support drive device 12, which is separate from the arm drive device 10 and with which the support 11 can be adjusted relative to the frame 3, is provided.

[0053] The support 11 is mounted on the frame 3 rotatably about an axis of rotation 13, wherein the bending arm 9 is arranged on the support 11 such that the axis of rotation 13 intersects the bending arm 9. An extremely compact construction of the bending head 1 is thereby achieved.

[0054] The support drive device 12 comprises a slider crank mechanism, wherein the slider crank mechanism has a crank 14, a lever 15, and a connecting rod 16. The connecting rod 16 is arranged between the crank 14, which can be moved in the direction of the double arrow 66, and the lever 15 connected to the support 11.

[0055] The bending arm 9 is linearly displaceably mounted on the support 11, wherein two bearings 17 are arranged on the support 11, on which in each case a guide for the bending arm 9 is formed. In the marked position of the support 11, the bending arm 9 can be moved in the direction of the double arrow 67 relative to the support 11 and relative to the frame 3, of which only a small section in the case of the counterholder 6 is marked in FIG. 2. During this movement, a distance of the bending face 4 from the pivot point 13 is altered. A leg length 44 of a bending (cf. FIG. 4) can thereby be altered in a particularly advantageous manner.

[0056] The arm drive device 10 has a drive shaft 19 and a gearing mechanism, with which a rotational movement of the drive shaft 19 can be converted to a linear movement of the bending arm 9. The gearing mechanism can be designed differently. In the specifically represented case, the gearing mechanism has a gear wheel 20 and a gear rack 21, wherein the gear wheel 20 can be driven by the drive shaft 19 and the gear rack 20 is arranged on the bending arm 9. If the gear wheel 20 is made to rotate, the gear rack 21 and the bending arm 9, which is connected thereto in a movement-coupled manner, are linearly moved.

[0057] It is appropriate that the arm drive device 10 and the support drive device 12 are designed with absolute encoders.

[0058] A control and/or regulation device 22 is provided, which is indicated schematically by a dashed rectangle in FIG. 2. With the control and/or regulation device 22, the arm drive device 10 and the support drive device 12 can be actuated such that the bending face 4 can perform a bending trajectory 24 relative to the frame 3 adapted to a predefined bend of the at least one wire 5, to a wire diameter 23 of the at least one wire 5, and/or to a predefined bending radius 8 of the at least one bending die 7. The control and/or regulation 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 can also be formed wireless.

[0059] Through the combination of a rectilinear movement of the bending arm 9 and an angular movement of the support 11, it is possible to reach any desired point with the bending face 4.

[0060] Due to the construction of the bending machine with a turntable for the pivoting movement and lifting of the bending arm via a gear wheel through the middle of the turntable, this is very compact and can also be used in unfavorable spatial conditions.

[0061] It has proved to be advantageous that the control and/or regulation device 22 is designed such that a very short cycle time for a bending is achieved.

[0062] The bending head 1 of the embodiment example represented can be operated fully automatically.

[0063] The bending head 1 comprises several, specifically five, bending dies 7 with different predefined bending radii 8, wherein a bending die changing device 25 is provided, with which the bending dies 7 can be moved between a bending position and at least one storage position. If a bending die 7 is in the bending position, it is arranged approximately between the counterholder 6 and the bending face 4. A position deviating therefrom in which a bending die 7 is not involved in a bending process represents a storage position. The top bending die 7 in FIG. 2 is in the bending position and the remaining bending dies 7 are arranged in a storage position.

[0064] The bending die changing device 25 has a star-shaped holder 26 with several arms 27, wherein one of the bending dies 7 is or can be arranged in each case on each arm 27. In the specifically represented case, the holder 26 has five arms 27, on the free ends of which a bending die 7 is arranged in each case.

[0065] The bending die changing device 25 is mounted rotatably about an axis of rotation 13, wherein the axis of rotation 13 of the bending die changing device 25 coincides with the axis of rotation 13 of the support 11.

[0066] A die changing drive device 28 (cf. FIG. 5b is provided, with which one of the bending dies 7 can be moved from the bending position into at least one storage position, and vice versa.

[0067] With the aid of the bending die changing device 25, a suitable bending die 7 can be swapped in depending on the requirements and wire diameter 23 (cf. FIG. 4) of the wire 5 to be bent.

[0068] The bending dies 7 can have a structured surface in the region of the predefined bending radius 8, in order to increase the frictional force relative to the wire 5. For example, the structured surface can be formed barb-shaped in cross section at least in regions.

[0069] The counterholder 6 is arranged stationary on the frame 3.

[0070] The bending face 4 is formed on a bending pin 31 in the case represented.

[0071] The bending head 1 can be used in a method for bending at least one wire 5 in a welded wire mesh 2, wherein the method comprises the following method steps: [0072] the support 11 is adjusted relative to the frame 3 by means of the support drive device 12, in the specific embodiment example is rotated about an axis of rotation 13, and [0073] 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, in the specific embodiment example is linearly displaced.

[0074] In a further method step, at least one of the bending dies 7 is moved between a bending position and at least one storage position by means of the bending die changing device 25, wherein in the specific embodiment example the at least one bending die 7 is rotated relative to the frame 3 at least in part.

[0075] FIG. 3 shows the preferred embodiment example of the bending head 1 in a further schematically represented cross-sectional view from the side, wherein a series of positions of the bending arm 1 passed through one after another in the course of a bending process of a wire 5 are marked by way of example in the figure.

[0076] The arm drive device 10 and the support drive device 12 are actuated by means of the control and/or regulation device 22 such that the bending face 4 performs a bending trajectory 24 relative to the frame 3 adapted to a predefined bend of the at least one wire 5, to a wire diameter 23 of the at least one wire 5, and/or to a predefined bending radius 8 of the at least one bending die 7. In the specifically represented case, for example, it is appropriate to guide the bending face 4 or the bending pin 31 on a substantially circular bending trajectory 24 around the bending die 7.

[0077] A larger part of the frame 3 is represented in FIG. 3. It is appropriate that a group consisting of the support 11 and the bending arm 9 arranged on the support 11 is mounted as a whole adjustably relative to the frame 3, wherein the group can be adjusted in a vertical direction 29 in the position of use of the bending head 1. A group drive device 30 (cf. FIG. 5b is provided, with which the group can be adjusted relative to the frame 3.

[0078] The frame 3 can have an opening 45, inside which the group can be adjusted. The opening 45 can for example be formed in the shape of an elongated hole and/or have end stops, which define the maximum positions of the group relative to the frame 3.

[0079] The bending head 1 can be used in a method for bending at least one wire 5 in a welded wire mesh 2. It is appropriate that the group consisting of the support 11 and the bending arm 9 arranged on the support 11 is adjusted as a whole relative to the frame 3 in a method step, namely at least in a vertical direction 29 in the position of use of the bending head 1. This method step makes it easier to change dies in the case of a limited table cutout in a mesh table 33 (cf. FIG. 4) and/or to thread a wire 5. Moreover, the distance of the bending head 1 from the counterholder 6 can be optimally adapted to the wire diameter 23 of the wire 5 to be bent.

[0080] FIG. 4 shows the preferred embodiment example of the bending head 1 in a further schematically represented cross-sectional view from the side, wherein a mesh table 33 and a cutout in a welded wire mesh 2 arranged thereon are additionally represented.

[0081] A mesh table 33 is thus provided, on which at least one welded wire mesh 2 can be positioned, wherein the mesh table 33 has at least one opening, in which the counterholder 6, the bending face 4 and the at least one bending die 7 of the bending head 1 are or can be arranged, in order to bend at least one wire 5 in the at least one welded wire mesh 2.

[0082] The construction of the bending head 1 makes it possible to design the at least one opening relatively small compared with the state of the art. For example, it can be provided that the opening has a maximum width 35 of 300 mm, particularly preferably of 250 mm.

[0083] Of the cutout in the welded wire mesh 2, several transverse wires 42 arranged next to each other are represented. These are arranged in a first mesh layer 41. The distance 43 between the transverse wires 42 can be 150 mm for example. This distance 43 is sufficient to carry out all bending processes by means of the bending head 1.

[0084] In the specifically represented case, the welded wire mesh 2 comprises a wire 5 which is bent in two partial bends of in each case 90° with the aid of the bending head 1. The leg length 44 between the two partial bends is e.g. 110 mm. A second mesh layer can be fastened to the section of the wire 5 bent upwards. In this case, the wire 5 acts as a spacer from the second mesh layer.

[0085] In the course of a bending process, the wire 5 is pressed upwards in the vertical direction 29 by the bending face 4 of the bending arm 9 and in the process is bent around the bending die 7. The wire 5 is held by the stationary counterholder 6. Because the bending die changing device 25 can be adjusted in the vertical direction 29, the die's lower edge can adapt to the wire diameter 33, which can be 8 mm for example.

[0086] Because of the stationary counterholder 6 and the adjustable bending die changing device 25, an advantage additionally results to the effect that the weight of the group consisting of bending arm 9 and support 11 assists with the holding up during the bending and the group drive device 30 only needs to be able to hold the weight of the group. The group drive device 30 need not absorb any force from the bending.

[0087] FIGS. 5a, 5b and 5c show the preferred embodiment example of the bending head 1 in different schematically represented perspective views.

[0088] A base frame 36 is provided, on which the bending head 1 is arranged, wherein the bending head 1 is arranged rotatably relative to the base frame 36. A bending head rotary drive 37 is provided, with which the bending head 1 can be rotated relative to the base frame 36.

[0089] The bending head 1 is arranged displaceably relative to the base frame 36, wherein a bending head displacement drive 38 is provided, with which the bending head 1 can be displaced relative to the base frame 36.

[0090] The displaceable arrangement can be realized by means of a guide 55 as in the case represented. A gearing 56, in which a drivable gear wheel of the bending head displacement drive 38 engages, can be formed on the guide 55.

[0091] The frame 3 of the bending head 1 is arranged on a base 54, which can be formed e.g. in the shape of a plate.

[0092] Another further bending head 1 can also be arranged on the base frame 36, with the result that a total of two bending heads 1 are or can be arranged on two opposite ends 39 of the base frame 36.

[0093] As follows from FIG. 5c, a position-detecting unit 18 can be provided, with which the position of at least one wire 5 to be bent relative to the bending head 1 can be detected, wherein the position-detecting unit 18 in the case represented comprises a laser 34. The laser 34 can emit a laser beam 58, which runs substantially parallel to the bending arm 9 and in the wire plane due to the arrangement in the specific case.

[0094] The bending dies 7 can be arranged on retaining plates 57, wherein the retaining plates 57 can be releasably connected to the star-shaped holder (26). In this way, when worn out or as needed, the bending dies 7 can be replaced with a bending die 7 not held in stock having a further predefined bending radius 8 in a few maneuvers.

[0095] The group drive device 30 can have a gear wheel 59 and a guide 60 for adjusting the group consisting of bending arm 9 and support 11.

[0096] The die changing drive device 28 can have a gear wheel 61.

[0097] FIG. 6 shows a preferred embodiment example of a system 32 for producing welded wire mesh 2.

[0098] The system 32 comprises a wire magazine 46, wherein the wire magazine 46 has an unwinding device 47 for several reels 48, on which wires 5 with different properties, e.g. different wire diameters 23, can be stored.

[0099] The system 32 comprises a straightening machine 49 for straightening at least one wire 5 unwound from one of the reels 48.

[0100] The system 32 comprises a welding device 50 for welding intersecting longitudinal wires 51 and transverse wires 42 together to form at least one welded wire mesh 2.

[0101] As in the embodiment example represented, it can be provided that the longitudinal wires 51 are conveyed from the straightening machine 49 in the direction of the welding device 50 by means of a platform 62 guided on rails 69 in the direction of the double arrow 69.

[0102] The transverse wires 42 can be fed to the welding device 50 for example in a transverse direction 65.

[0103] The welded wire mesh 2 welded together by the welding device 50 can be conveyed further in the transverse direction 65 along a transverse table 70. A bending station 71 extends in the longitudinal direction 64 on one side of the transverse table 70. The bending station 71 comprises two bending heads 1, which can be designed according to the embodiment example represented in FIGS. 2 to 5c.

[0104] Furthermore, neighboring the bending heads 1, beam bending devices 52 can be provided for simultaneously bending a series of wires 5 arranged next to each other.

[0105] A transport device 53 for transporting at least one welded wire mesh 2 away is arranged on an opposite side of the transverse table 70, wherein the transport device 53 can be formed e.g. as a chain conveyor. The finish-machined welded wire mesh 2 can be taken out of the transport device 53 manually for example.

[0106] Mesh grippers 63 can be provided, with which the welded wire mesh 2 can be moved between the transverse table 70, the bending station 71 and the transport device 53.