Device, bending machine and method for bending a rod

Abstract

Device (1) for bending at least one bar (2), preferably reinforcing steel, comprising: - at least one support element (3) on which the bar (2) can be partially placed in a bending plane during bending; - at least one die (4) arranged on the at least one support element (3) about which the bar (2) can be bent; - at least one bending mandrel (5) arranged on the at least one support element (3) and spaced apart from the at least one die (4), which is configured to bend the bar (2) in a bending position (6) by a movement relative to the at least one die (4) about the at least one die (4); and - at least one lifting device (7) for lifting the bar (2) in a vertical direction (8) perpendicular to the bending plane away from the at least one support element (3).wherein the at least one die (4) and the at least one bending mandrel (5) and preferably the at least one support element (3) are arranged in the bending position (6) in the vertical direction (8) in a position fixed.

Description

[0001] The present invention relates to a device for bending at least one rod, preferably reinforcing steel, comprising at least one support element on which the rod can be partially placed in a bending plane during bending, at least one die arranged on the support element around which the rod can be bent, at least one bending mandrel arranged on the support element and spaced apart from the at least one die, which is configured to bend the rod in a bending position around the at least one die by a movement relative to the at least one die, and at least one lifting device for lifting the rod in a vertical direction perpendicular to the bending plane away from the at least one support element.

[0002] Furthermore, the invention relates to a bending machine with such a device and a method for bending at least one rod.

[0003] Such devices and bending machines are used for the fully automated bending of bars such as concrete or reinforcing steel. The basic process involves cutting a continuous metal wire to at least one bar length, then feeding the bar into the device where it is bent once or several times, and subsequently removed from the device.

[0004] The bending of the bar is typically achieved through a relative movement between the bending mandrel and the die. To achieve different bending shapes, for example, bar shapes with multiple bends in the same or opposite directions, it may be necessary to change the arrangement of the bar relative to the die and the bending mandrel. Prior art devices are used to achieve this by lowering and raising the die and / or the bending mandrel to move them from a first bending position to a second bending position. That is, the bar is first bent in a first direction, with the die and the bending mandrel in the first bending position, and then bent in a second direction, with the die and the bending mandrel in the second bending position. In some prior art solutions, the support element is also raised.The same principle is usually applied after bending to eject the rod from the device.

[0005] A major disadvantage of these known solutions is that lowering and raising the die, bending mandrel, and, if applicable, the support element, requires considerable force due to their significant mass and the associated inertia. This results in high energy consumption. Furthermore, moving these masses during the bending process takes a relatively long time. Such solutions are particularly disadvantageous when large bending radii are required, as the die and / or bending mandrel typically have large diameters and therefore large masses to be moved.

[0006] The object of the present invention is therefore to provide a device improved upon the prior art, which enables more energy-efficient and faster bending of one or more rods.

[0007] This problem is solved by the features of claim 1, namely with a device of the type mentioned at the outset, in which the at least one die and the at least one bending mandrel and preferably the at least one support element are arranged in the bending position in the vertical direction in a position fixed.

[0008] This advantageously avoids the need to lift the at least one die, the at least one bending mandrel, and, if applicable, the at least one support element vertically. Consequently, drives that would move these components vertically are unnecessary. Compared to prior art devices, this saves energy and time.

[0009] Due to the smaller number of drives, particularly pneumatic ones, the device according to the invention is also significantly less susceptible to dirt compared to conventional devices. The device according to the invention is therefore considerably more robust and less prone to failure, which advantageously increases production times due to reduced downtime.

[0010] The at least one die is preferably to be understood as a body which provides resistance to the rod when bending, wherein the rod, when bending, bears against the at least one die section by section, in particular against a contour of the at least one die.

[0011] The at least one bending mandrel is preferably understood as a body which provides resistance to the rod during bending, wherein the rod, during bending, bears against the at least one bending mandrel section by section, in particular against a contour of the at least one bending mandrel.

[0012] The rod is bent around the at least one die using at least one bending mandrel, resulting in a desired bending radius and bending angle. The bending radius is typically determined by the die diameter, the bending mandrel diameter, the die contour, the mandrel contour, and / or the distance between the die and the mandrel.

[0013] The at least one lifting device is preferably designed to lift the rod in the vertical direction.

[0014] The vertical direction is essentially perpendicular to the bending plane, although it may be inclined or oriented obliquely to a surface. The vertical direction can also be oriented vertically or at an angle to the surface.

[0015] The bending plane is, in particular, the plane which is normal to the vertical direction and / or within which the rod remains while it is bent.

[0016] Further advantageous embodiments of the invention are defined in the dependent claims.

[0017] It is particularly preferred that the at least one lifting device is designed to lift the bar vertically over the at least one die and / or over the at least one bending mandrel. This allows the bar to be positioned in different bending positions, for example for multiple bending operations, particularly with reverse bends, and / or simply ejected from the device.

[0018] In preferred embodiments, the at least one lifting device comprises at least one lifting element, preferably with at least one support surface, wherein the rod can be lifted by means of the at least one lifting element.

[0019] Preferably, the lifting device comprises several lifting elements, wherein at least one lifting element is designed for lifting the rod and / or ejecting the rod and / or for both lifting and ejecting the rod. In other words, the at least one lifting device can have several lifting elements with different functions.

[0020] Preferably, the at least one lifting device is designed to push the rod in the vertical direction, particularly without holding the rod in place. This allows the rod to be lifted in a very simple manner, i.e., without complicated gripping mechanisms, etc.

[0021] In particularly preferred embodiments, the at least one lifting device is designed to raise the rod, preferably by means of the at least one support surface, in the vertical direction, wherein the vertical direction is inclined to a substrate, and wherein the device is designed to allow the rod to slide or fall out of the device after lifting, preferably in the longitudinal direction.

[0022] Preferably, the device, in particular the at least one lifting device or a counter-holding device, is designed to hold the rod in place during bending, preferably wherein the device has at least one counter-holding surface, preferably two opposing counter-holding surfaces. The rod can thus be held stably, for example, during bending.

[0023] The at least one counter-support surface preferably lies in a plane orthogonal to the bending plane and / or provides resistance to the rod during bending.

[0024] It is preferably provided that the device, in particular the at least one lifting device, is designed to feed the rod to the storage element and / or to advance the rod along the storage element.

[0025] In preferred embodiments, the device, preferably the at least one lifting device, has at least one clamping device for feeding and / or advancing and / or clamping the rod.

[0026] It can be provided that the device, preferably the at least one lifting device and / or the at least one clamping device, has at least one gap, preferably wherein the at least one gap formed by the two opposing support surfaces and / or has a variable gap width and / or has a gap base designed for storing the rod.

[0027] The rod can thus be easily placed, positioned, and / or fixed in at least one slot. Furthermore, the slot width can be easily adjusted to a desired rod diameter to fully fulfill the function for any rod.

[0028] It is conceivable that at least one counter-surface is designed to form a gap that varies in a direction parallel to the height direction, i.e., with a gap width that varies in this direction.

[0029] For example, the gap can taper and / or narrow towards the slatted floor and / or towards the support surface.

[0030] Preferably, at least one counter-support surface varying in a direction parallel to the height direction is provided, particularly on at least one lifting element.

[0031] It is particularly preferred that at least one combined lifting and clamping device is provided which has the properties of at least one lifting device and at least one clamping device.

[0032] It is also conceivable that the device and / or the bending machine has at least one holding device, preferably with at least one hinged holding element, wherein the at least one holding device is designed to counteract unwanted deflections of the rod, especially in the case of long rods.

[0033] In preferred embodiments, the at least one die and / or the at least one bending mandrel is / are rotatable about an axis of rotation perpendicular to the bending plane, preferably wherein the bar can be bent around the at least one die by the rotation of the at least one bending mandrel about the axis of rotation. In this way, the relative movement between the at least one die and the at least one bending mandrel can be generated in a simple manner.

[0034] In particularly preferred embodiments, the at least one die is cylindrical with a cylindrical axis, preferably with the cylindrical axis coinciding with the axis of rotation. This allows, for example, bending diameters of 200 mm for the bent section of the bar to be produced.

[0035] At least one die can be mounted without rotation around the axis of rotation. This allows, for example, the friction between the rod and the die to be kept low.

[0036] In preferred embodiments, the at least one bending mandrel is cylindrical with a cylindrical axis, and the bending mandrel can be mounted so as to be free of rotation about its cylindrical axis. This allows, for example, the friction between the rod and the bending mandrel to be kept low.

[0037] Due to the rotational symmetry of the at least one die and / or the at least one bending mandrel, the at least one die and / or the at least one bending mandrel are always correctly positioned relative to the bar.

[0038] It is preferably provided that the at least one bending mandrel maintains a constant distance from the axis of rotation, at least during the bending of the bar. Between multiple bending operations, the distance can also vary to produce different bending radii.

[0039] In preferred embodiments, the device has a bending head to which the at least one die and the at least one bending mandrel are preferably detachably attached and which is designed to drive the movement of the at least one bending mandrel and preferably the at least one die.

[0040] In particularly preferred embodiments, the at least one lifting device is configured to lift the rod in the vertical direction, wherein the vertical direction is inclined to a surface, and wherein the device is configured to allow the rod to slide or fall out of the device after lifting, preferably in the longitudinal direction, and wherein the device has a bending head to which the at least one die and the at least one bending mandrel are attached as a unit, preferably detachably, and wherein the bending head is configured to drive the movement of the unit.

[0041] The bending head is particularly preferably designed to move translationally in the bending plane, i.e. in a plane orthogonal to the height direction, preferably in a longitudinal direction.

[0042] The longitudinal direction is preferably that which is orthogonal to an as yet undistorted, straight rod. That is, preferably, that the undistorted rod extends in a transverse direction.

[0043] In preferred embodiments, the device is designed to be displaceable, in particular translationally and / or in the transverse direction.

[0044] The device can be moved, for example, by means of at least one guide rail.

[0045] In the case that a bending machine comprises several devices, preferably at least one device is mounted in a translationally displaceable manner, in particular so that a distance between the dies and / or the bending mandrels can be adjusted according to a bar length of the bar to be bent and / or according to desired bending points on the bar.

[0046] It is preferably provided that the device has a bending table, preferably inclined at least when the rod is ejected from the device relative to the ground, which is designed for the partial placement of the rod.

[0047] The bending table can preferably be seen as a supplement to at least one storage element, which allows the rod to be laid more evenly and / or uniformly on the device.

[0048] Preferably, the bending table has a substantially closed table surface, in particular so that the rod and / or its rod ends cannot get caught in the device.

[0049] It is particularly preferred that the at least one die, the at least one bending mandrel, and preferably the at least one support element form at least one unit in which the relative positions of the at least one die, the at least one bending mandrel, and preferably the at least one support element are constant to each other, at least during bending, and in particular, wherein the at least one unit is interchangeable. With such a design, different units with different dies and different bending mandrels can be used practically in the device. For example, a desired die with a desired diameter can be used for a specific bar diameter.

[0050] It is preferably provided that the at least one unit and the bending head are designed such that the at least one unit can be inserted into and removed from the bending head and preferably locked and unlocked. This allows for a quick change between different units with different dies and / or different bending mandrels.

[0051] For insertion and removal, the at least one unit and the bending head can have corresponding guides, e.g. T-slot guides, and a locking device, e.g. comprising at least one locking bolt.

[0052] The device can include at least one, preferably fully automated, interchangeable device, which is designed for attaching and detaching the at least one die and / or the at least one bending mandrel, preferably as at least one unit, to and from the device.

[0053] Preferably, the at least one changing device is designed to insert and remove the at least one unit at the bending head and / or to transfer it to and from a die magazine for storing dies.

[0054] It is also conceivable that at least one die and at least one bending mandrel of at least one unit are individually interchangeable. This allows for particularly flexible use of different dies and / or bending mandrels.

[0055] The at least one unit can also be configured with a variable distance between the at least one die and the at least one bending mandrel. This makes it possible, for example, to produce different bending radii with one die and one bending mandrel.

[0056] In particularly preferred embodiments, the at least one storage element is inclined relative to the surface, at least in an ejection position in which the rod can be ejected from the device. This allows the rod to simply slide or fall out of the device after bending, e.g., by gravity.

[0057] It is conceivable that the device has at least one sliding surface, in particular one which enables the rod to slide out of the device with particularly low friction.

[0058] In preferred embodiments, the bending table has a recess in which the at least one support element is recessed, preferably such that the table surface next to the recess of the bending table lies essentially in the bending plane. This allows, for example, sufficient space for movement of the at least one die and the at least one bending mandrel to be provided in a simple manner. Furthermore, when changing dies, the at least one changing device can thus insert and remove a unit consisting of the die, bending mandrel, and preferably the support element, unhindered from the bending head.

[0059] In the event that the at least one die and the at least one bending mandrel and / or the bending table, in particular the table surface, is or are inclined to a substrate, the longitudinal direction preferably runs in the bending plane from top to bottom or from bottom to top.

[0060] Protection is also sought for a bending machine with at least one device according to the invention, preferably with two devices according to the invention arranged in a mirrored arrangement to each other, and with at least one drive for driving the at least one lifting device, the at least one die and the at least one bending mandrel.

[0061] In preferred embodiments, the bending machine comprises a spooling device for spooling a steel wire and / or a straightening machine for shaping the steel wire, preferably reinforcing steel, and / or a cutting device for cutting the steel wire into a cut-to-length bar and / or at least one changing device for attaching and detaching the at least one die and / or the at least one bending mandrel, preferably as at least one unit, to and from the device and / or at least one die magazine for storing the at least one die, the at least one bending mandrel, further dies and / or further bending mandrels, preferably each as one unit.

[0062] The die magazine preferably comprises a plurality of dies with different average diameters and / or contours. For example, depending on the bar diameter, a desired die with a specific diameter, particularly in combination with a desired bending mandrel and / or storage element, can be inserted into the device as at least one unit. Typical bar diameters are, for example, in the range of 8 to 20 mm.

[0063] Furthermore, protection is sought for a method for bending at least one rod with at least one device according to the invention, comprising the following steps: Placing the rod on the at least one support element; bending the rod with the at least one bending mandrel around the at least one die; lifting the rod in the vertical direction with the at least one lifting device; placing the rod on the at least one support element and bending the rod with the at least one bending mandrel around the at least one die and / or ejecting the rod from the at least one device.

[0064] It may be provided that the rod is bent once or several times before it is ejected from the device.

[0065] Ejection is not necessarily to be understood as an active ejection, but can also be understood as a sliding, slipping, falling out or similar.

[0066] Further advantages and details of advantageous variants of the invention will become apparent from the figures and the accompanying figure description. These show: Fig. 1 a view of a first embodiment of a device according to the invention, Fig. 2 a bent rod, Figs. 3-4 a bending head of a device according to the invention, Figs. 5-7 further views of the first embodiment of a device according to the invention, Figs. 8-11 views of a second embodiment of a device according to the invention, Figs. 12-17 a sequence of a bending process with a first embodiment of a bending machine with two devices according to the invention, Figs. 18-22 a sequence of a bending process with a second embodiment of a bending machine with two devices according to the invention, and Figs. 23-28 views of a third embodiment of a device according to the invention.

[0067] The Fig. 1 shows a perspective view of a first embodiment of a device 1 according to the invention for bending at least one rod 2, preferably reinforcing steel or reinforcing steel, comprising at least one support element 3 on which the rod 2 can be partially placed in a bending plane during bending, at least one die 4 arranged on the at least one support element 3 about which the rod 2 can be bent, at least one bending mandrel 5 arranged on the at least one support element 3 and spaced apart from the at least one die 4, which is configured to bend the rod 2 in a bending position 6 by a movement relative to the at least one die 4 about the at least one die 4, and at least one lifting device 7 for lifting the rod 2 in a vertical direction 8 perpendicular to the bending plane away from the at least one support element 3, wherein the at least one die 4 and the at least one bending mandrel 5 and preferably the at least one support element 3 are arranged in the bending position 6 in the vertical direction 8 in a positionally fixed manner.

[0068] The bending plane is preferably that plane which is orthogonal to the height direction 8, and in which the longitudinal direction 23 preferably lies.

[0069] In this preferred embodiment, the at least one die 4 and the at least one bending mandrel 5 are preferably detachably attached to the at least one support element 3, wherein the at least one die 4, the at least one bending mandrel 5 and the at least one support element 3 are arranged in the bending position 6 in the vertical direction 8 in the bending position 6 in a positionally fixed manner.

[0070] In this preferred embodiment, the at least one lifting device 7 has at least one lifting element 9 which is designed to lift the rod 2 in the vertical direction 8 over the at least one die 4 and / or over the at least one bending mandrel 5.

[0071] In Fig. 1 It is shown that the device 1, preferably the at least one lifting device 7, for holding the rod 2 in place when bending the rod 2, preferably has at least one holding surface 11, preferably two holding surfaces 11 facing each other.

[0072] The device 1, preferably the at least one lifting device 7, can be designed to feed the rod 2 to the storage element 3 and / or to advance the rod 2 along the storage element 3.

[0073] In this embodiment, the at least one lifting device 7 has at least one gap 13, in particular wherein the at least one gap 13 has a gap bottom designed for storing the rod 2 and / or wherein the at least one gap 13 is formed by the two opposing counter-support surfaces 11.

[0074] It is also possible that at least one gap 13 has a variable gap width.

[0075] Particularly preferred is or are the at least one die 4 and / or the at least one bending mandrel 5 rotatable about an axis of rotation 14 perpendicular to the bending plane, preferably wherein the rod 2 is bendable about the at least one die 4 by the rotation of the at least one bending mandrel 5 about the axis of rotation 14.

[0076] In this preferred embodiment, the at least one die 4 is cylindrical with a cylinder axis, preferably wherein the cylinder axis coincides with the axis of rotation 14.

[0077] Preferably, the at least one bending mandrel 5 is also cylindrical in shape and / or arranged at a distance from the axis of rotation 14 that is constant at least during the bending of the rod 2.

[0078] In this embodiment, the at least one die 4, the at least one bending mandrel 5, and the at least one support element 3 form at least one unit 21, wherein the relative positions of the at least one die 4, the at least one bending mandrel 5, and the at least one support element 3 are constant to each other, at least during bending.

[0079] To be precise, in Fig. 1 Two units 21 are shown, wherein one unit 21 is attached to a bending head 15 of the device 1 and is thus ready for bending the bar 2, and wherein a second unit 21, e.g. as a replacement and / or with die and / or bending mandrel diameters different from the unit 21 used, is held by the at least one changing device 24.

[0080] The at least one unit 21 is therefore preferably designed to be interchangeable as a whole unit 21, preferably wherein the at least one die 4 and the at least one bending mandrel 5 are each individually interchangeable, and / or wherein the distance between the at least one die 4 and the at least one bending mandrel 5 is variable.

[0081] In this embodiment, the device 1 comprises a bending table 17, preferably inclined relative to the ground at least when the rod 2 is ejected from the device 1, which is designed for the partial placement of the rod 2.

[0082] In this embodiment, the bending table 17 has a recess 18 in which the at least one storage element 3 is recessed, preferably such that a table surface 19 next to the recess 18 of the bending table 17 lies substantially in the bending plane. This allows the at least one exchange device 24 to easily slide the at least one unit 21 into and out of the bending head 15.

[0083] In this embodiment, the at least one storage element 3 is inclined relative to a substrate, in particular wherein the bending plane is inclined relative to the substrate.

[0084] The Fig. 2 Figure 1 shows a rod 2 bent by means of the device 1, wherein its Z-shaped bend was obtained by two bending operations. This means in particular that the rod 2 was obtained by a first bend, wherein the bending mandrel 5 rotates in a first direction of rotation about the die 5 or axis of rotation 14, and by a counter-bend, wherein the bending mandrel 5 rotates in a second direction of rotation opposite to the first direction of rotation about the die 5 or axis of rotation 14.

[0085] The Fig. 3 und 4 Figure 1 shows the optional, particularly preferably provided, bending head 15 of the device 1 in more detail, wherein the at least one die 4 and the at least one bending mandrel 5 are preferably detachably attached to the bending head 15.

[0086] Preferably the bending head 15 is designed such that the at least one unit 21 comprising a die 4, a bending mandrel 5 and preferably a storage element 3 can be inserted into and removed from the bending head 15 and preferably locked and unlocked.

[0087] The bending head 15 is particularly designed to drive the movement of the at least one bending mandrel 5 and preferably the at least one die 4, especially in the longitudinal direction 23.

[0088] In the Fig. 3 und 4 At least one lifting device 7 is also shown, which in this embodiment has two lifting elements 9 and a gap 13, wherein the gap 13 is formed from two counter-holding surfaces 11.

[0089] The Fig. 5-7 further views of the first embodiment of a device according to the invention 1. Fig. 5 The preferably provided at least one clamping device 12 can be seen, which in this embodiment is also a lifting device 7, since it is designed to lift and clamp the rod 2.

[0090] Preferably, the at least one clamping device 12 is designed for feeding and / or advancing the rod 1 to the storage device 3.

[0091] Particularly preferably, the at least one clamping device 12 has at least one gap 13.

[0092] Furthermore, two units 12 are shown here, each with a storage element 3, a die 4, and one or two bending mandrels 5. One unit 12 with two bending mandrels 5 is attached to the bending head 15, ready for bending. Another unit 21 with only one bending mandrel 5 is stored in a die magazine.

[0093] In the Fig. 6 and 7An optional, particularly preferred, interchangeable device 24 is shown, wherein this device carries a unit 21 with a storage element 3, a die 4 and a bending mandrel 5 (not shown). The interchangeable device 24 makes it possible to use different units 21 with different dies 4 and bending mandrels 5 for bending.

[0094] In the following descriptions of the embodiments shown in the figures below, the differences from the first embodiment will be emphasized to avoid repetition. Otherwise, the above description of the first embodiment also applies to the embodiments described below, insofar as it is applicable.

[0095] The Fig. 8-11 Figure 1 shows views of a second embodiment of a device 1 according to the invention in a preferred embodiment of a bending machine 20, wherein this embodiment has two devices 1 arranged mirrored to each other and at least one drive (not shown) for driving the at least one lifting device 7, the at least one die 4 and the at least one bending mandrel 5.

[0096] This variant further comprises an exchange device 24 for attaching and detaching the at least one die 4 and / or the at least one bending mandrel 5, preferably as at least one unit 21, to and from the device 1, and at least one die magazine for storing the at least one die 4, the at least one bending mandrel 5, further dies 4 and / or further bending mandrels 5, preferably each as a unit 21.

[0097] In the Fig. 9-11 In addition to the units 21 attached to the bending heads 15, further units 21 are shown in the die magazine and / or in the changing device 24.

[0098] The bending machine 20 can also a spooling device for spooling a steel wire and / or a straightening machine for shaping the steel wire, preferably reinforcing steel, and / or a cutting device for cutting the steel wire to length into a cut-to-length bar 2 include.

[0099] In this variant of a bending machine 20, each device 1 has a lifting device 7 which adjoins the recesses 18 of the bending tables 17. One of these lifting devices 7 is in Fig. 10 shown.

[0100] Between these two lifting devices 7, which are assigned to the devices 1, an additional lifting device 7 is arranged, which is simultaneously a clamping device 12. This combined lifting and clamping device 7, 12 is in Fig. 11 Clearly visible.

[0101] The Fig. 12-17 Figure 1 shows a sequence of a bending process with a first embodiment of a bending machine 20 with two devices 1 according to the invention. From this sequence, the method according to the invention for bending at least one bar 2 with at least one device 1 or bending machine 20 according to the invention can be derived, wherein the method comprises the following steps: Placing the rod 2 on the at least one support element 3; bending the rod 2 with the at least one bending mandrel 5 around the at least one die 4; lifting the rod 2 with the at least one lifting device 7 in the vertical direction 8; placing the rod 2 on the at least one support element 3 and bending the rod 2 with the at least one bending mandrel 5 around the at least one die 4 and / or ejecting the rod 2 from the at least one device 1.

[0102] The Fig. 12 This shows the rod 2 that has just been inserted into the devices 1, which Fig. 13 the bending of rod 2 at its two end regions, which Fig. 14 the raising of rod 2 in the vertical direction 8, the Fig. 15 the re-bending of the returned rod 2, the Fig. 16 the ejection of the rod 2 by means of lifting the rod 2 by the at least one lifting device 7, and the Fig. 17 the finished bent or finished produced rod 2.

[0103] If you compare, for example, the Fig. 9 and the Fig. 12 It is evident that the devices 1 are preferably designed to have a variable distance from each other. With a variable distance between the devices 1, the distance between the dies 4 and / or bending mandrels 5 can be easily adjusted according to the existing length of the rod 2 and / or according to the desired bending points on the rod 2.

[0104] The devices 1 can be designed to be translationally displaceable, for example guided on guide rails and / or driven.

[0105] During the transition from the to the Fig. 13 (first bend) and Fig. 14 (Lifting between bending operations) shown steps, it can be seen that the bending heads 15 with the dies 4 and bending mandrels 5 attached to them are preferably designed to be displaceable in the longitudinal direction 23.

[0106] In Fig. 14 It can be seen on the lifting devices 7, which are adjacent to the bending tables 17, that two lifting elements 9 are extended in the vertical direction 8 in order to lift the rod 2.

[0107] Furthermore, to hold the rod 2 stably, lifting elements 9 of the centrally arranged lifting and clamping device 7,12 are preferably extended simultaneously.

[0108] In the Fig. 15 In the step shown (bending the laid-down rod 2 again), all lifting elements 9 are retracted.

[0109] In Fig. 16 (Ejection of the rod 2) then the lifting elements 9 of the lifting devices 7 and the central lifting and clamping device 7,12 are extended in the vertical direction 8, so that the rod 2 can be ejected from the devices 1.

[0110] In this embodiment, some of the lifting elements 9 have at least one support surface 10 by means of which the rod 2 can be lifted and / or on which the rod 2 can rest.

[0111] In this embodiment, the at least one storage element 3 is inclined relative to the ground, at least in the ejection position 16, in which the rod 2 can be ejected from the device 1.

[0112] In Fig. 17 (Bar 2 fully produced) it can be seen that the device 1 and / or the bending machine 20 may preferably include one or more collecting elements, wherein the collecting elements are designed to collect the fully bent bar 2.

[0113] Here, the bending tables 17 including their troughs 18 are also inclined relative to the ground, in particular so that the rod 2 can fall out of the at least one device 1 and / or slide off by means of gravity.

[0114] The Fig. 18-22 show a further sequence of a bending process with a second embodiment of a bending machine 20 with two devices according to the invention 1.

[0115] The Fig. 18 and 19 show a rod 2 thrown into the devices 1, which Fig. 20 a first bending of rod 2, the Fig. 21 a second bending of rod 2 and the Fig. 22 the ejection of the rod 2 by means of lifting the rod 2 by the at least one lifting device 7.

[0116] The Fig. 18 Figure 1 shows a cross-section through the bending machine 20, showing a view of a device 1 and in particular the die 4 and the bending mandrel 5, with the rod 2 visible between the die 4 and the mandrel 5. A lifting element 9 of the at least one lifting device 7 can also be seen behind the die 4.

[0117] According to the Fig. 18 The view shown is also in the Fig. 19 The extended lifting elements 9 of the lifting devices 7 and the centrally arranged lifting and clamping device 7,12 can be seen.

[0118] In this embodiment, the bending machine 20 also includes, in particular, two holding devices 22, which are provided for the stable holding of the rod 2.

[0119] Such holding devices 22, which preferably include hinged holding elements, are used primarily for long rods 2 in order to avoid larger deflections of the rod 2.

[0120] In Fig. 20 The first bending of the rod 2 is shown, with the lifting elements 9 of the lifting devices 7 and the lifting and clamping device 7,12 retracted, but the holding devices 22 still extended to stabilize the rod 2.

[0121] In Fig. 21 The rod 2 is bent again, with the bending points on the rod 2 now being closer together. Therefore, the devices 1 are arranged closer together, so that the distance between the dies 4 and / or the bending mandrels 5 is again smaller.

[0122] Since rod 2 is now shorter within the bending points than in its original, long state ( Fig. 19 and 20When the ) is inactive, the holding devices 22 are inactive or folded in. Additional stabilization of the rod 2 is not necessary due to its shorter length.

[0123] In Fig. 22 The double-bent rod 2 was just lifted in the vertical direction 8 by means of the lifting elements 9 of the lifting devices 7 and thereby ejected.

[0124] In this preferred embodiment, some of the lifting elements 9 have at least one support surface 10 by means of which the rod 2 can be lifted.

[0125] The Fig. 23-28 Figure 1 shows views of a third embodiment of a device 1 according to the invention with a combined lifting and clamping device 7, 12 for lifting and clamping the rod 2. The specific design of the lifting and clamping device 7, 12 differs from that of the previous embodiments.

[0126] In this embodiment, at least one counter-holding surface 11 of the gap 13 is arranged on at least one clamping lever 25, wherein the at least one clamping lever 25 is designed to clamp the rod 2.

[0127] The Fig. 23 and 24 show perspective views and the Fig. 25 a corresponding side view of the third embodiment, showing sections of several rods 2 which rest in the gap 13 on at least one lifting element 9 of the lifting device 7.

[0128] In Fig. 25 It is evident that the rods 2 are still unclamped, since at least one counter-holding surface 11 is still spaced away from the rods 2 on one side. This means that the clamping lever 25 has not yet been actuated to clamp the rods 2.

[0129] In this embodiment, the at least one counter-support surface 11 is designed to form a gap 13 that varies in a direction parallel to the height direction 8, i.e., with a gap width that varies in this direction.

[0130] Specifically, the gap 13 tapers, preferably narrows, here towards the support surface 10, in particular so that the gap 13 can be adapted to the rod diameters of the rods 2.

[0131] The Fig. 26-28 Figures 1 show side views of three different states of the device 1, from which the respective gap widths of the gap 13 can be seen in particular.

[0132] The Fig. 26 shows a state in which rods 2 have just been thrown into the device 1, whereby a lifting element 9 with a varying counter-holding surface 11 has been raised in the height direction 8 in order to achieve a (compared to the state in Fig. 27 ) to create a smaller gap 13.

[0133] In contrast to Fig. 26 shows the Fig. 27 a state in which rods 2 have just been inserted into the device 1, with both lifting elements 9 being lowered in order to achieve a (compared to the state in) by means of the varying counter-holding surface 11 of one lifting element 9 Fig. 26 ) to create a larger gap 13.

[0134] The Fig. 28 shows a state in which both height elements 9 are raised in the height direction 8 in order to lift the bars 2 over the at least one die 4 and / or over the at least one bending mandrel 5 and eject them from the device 1.

Claims

1. Device (1) for bending at least one bar (2), preferably reinforcing steel, comprising: - at least one support element (3) on which the bar (2) can be partially placed in a bending plane during bending; - at least one die (4) arranged on the at least one support element (3) about which the bar (2) can be bent; - at least one bending mandrel (5) arranged on the at least one support element (3) and spaced apart from the at least one die (4), which is configured to bend the bar (2) in a bending position (6) by a movement relative to the at least one die (4) about the at least one die (4); and - at least one lifting device (7) for lifting the bar (2) in a vertical direction (8) perpendicular to the bending plane away from the at least one support element (3). characterized by the fact thatthe at least one die (4) and the at least one bending mandrel (5) and preferably the at least one support element (3) are arranged in the bending position (6) in the vertical direction (8) in a position fixed.

2. Device (1) according to claim 1, wherein the at least one lifting device (7) is designed to lift the rod (2) in the vertical direction (8), preferably with at least one lifting element (9), e.g. comprising at least one support surface (10), over the at least one die (4) and / or over the at least one bending mandrel (5).

3. Device (1) according to one of the preceding claims, wherein the device (1), preferably the at least one lifting device (7), is designed to counter-hold the rod (2) when bending the rod (2), preferably wherein the device (1) has at least one counter-holding surface (11), preferably two counter-holding surfaces (11) facing each other.

4. Device (1) according to one of the preceding claims, wherein the device (1), preferably the at least one lifting device (7), is designed for feeding the rod (2) to the storage element (3) and / or for advancing the rod (2) along the storage element (3) and / or wherein the device (1) has at least one clamping device (12) for feeding and / or advancing and / or clamping the rod (2).

5. Device (1) according to one of the preceding claims, wherein the device (1), preferably the at least one lifting device (7) and / or the at least one clamping device (12), has at least one gap (13), preferably wherein the at least one gap (13) is formed by the two opposing counter-holding surfaces (11) and / or has a variable gap width and / or has a gap bottom designed for storing the rod (2).

6. Device (1) according to one of the preceding claims, wherein the at least one die (4) and / or the at least one bending mandrel (5) is or are rotatable about an axis of rotation (14) oriented perpendicular to the bending plane, preferably wherein the rod (2) is bendable by the rotation of the at least one bending mandrel (5) about the axis of rotation (14) around the at least one die (4).

7. Device (1) according to claim 6, wherein - the at least one die (4) is cylindrical with a cylindrical axis, preferably wherein the cylindrical axis coincides with the axis of rotation (14), and / or - wherein the at least one bending mandrel (5) is cylindrical and / or - wherein the at least one bending mandrel (5) is spaced apart from the axis of rotation (14) by a distance that is constant at least during the bending of the rod (2).

8. Device (1) according to one of the preceding claims, wherein the device (1) has a bending head (15) to which the at least one die (4) and the at least one bending mandrel (5) are preferably detachably attached and which is designed to drive the movement of the at least one bending mandrel (5) and preferably the at least one die (4).

9. Device (1) according to one of the preceding claims, wherein the at least one die (4) and the at least one bending mandrel (5) and preferably the at least one support element (3) form at least one unit (21) in which the relative positions of the at least one die (4) and the at least one bending mandrel (5) and preferably the at least one support element (3) are constant to each other at least during bending, preferably wherein - the at least one unit (21) is interchangeable, preferably wherein the at least one die (4) and the at least one bending mandrel (5) of the at least one unit (21) are each individually interchangeable, and / or - wherein a distance between the at least one die (4) and the at least one bending mandrel (5) is variable.

10. Device (1) according to claim 9, wherein the bending head (15) is configured such that the at least one unit (21) can be inserted into and removed from the bending head (15) and is preferably lockable and unlockable.

11. Device (1) according to one of the preceding claims, wherein the at least one storage element (3) is inclined relative to a substrate at least in an ejection position (16) in which the rod (2) can be ejected from the device (1).

12. Device (1) according to one of the preceding claims, wherein the device (1) has a bending table (17), preferably inclined at least when ejecting the rod (2) from the device (1) relative to the substrate, which is designed for the partial placement of the rod (2).

13. Device (1) according to claim 12, wherein the bending table (17) has a recess (18) in which the at least one storage element (3) is recessed, preferably such that a table surface (19) next to the recess (18) of the bending table (17) lies substantially in the bending plane.

14. Bending machine (20) with at least one device (1), preferably with two devices (1) arranged mirror images of each other, according to one of claims 1 to 13 and with at least one drive for driving the at least one lifting device (7), the at least one die (4) and the at least one bending mandrel (5), wherein the bending machine (20) preferably includes: - a spooling device for spooling a steel wire and / or - a straightening machine for forming the steel wire, preferably reinforcing steel, and / or - a cutting device for cutting the steel wire to length into a cut bar (2) and / or - at least one changing device (24) for attaching and detaching the at least one die (4) and / or the at least one bending mandrel (5), preferably as at least one unit (21), to and from the device (1) and / or - at least one die magazine for storing the at least one die (4), the at least one bending mandrel (5),further dies (4) and / or further bending mandrels (4), preferably each as a unit (21), comprise.

15. A method for bending at least one bar (2) with at least one device (1) according to any one of claims 1 to 13 or a bending machine (20) according to claim 14, comprising the following steps: - placing the bar (2) on the at least one support element (3); - bending the bar (2) with the at least one bending mandrel (5) around the at least one die (4); - raising the bar (2) with the at least one lifting device (7) in the vertical direction (8); - placing the bar (2) on the at least one support element (3) and bending the bar (2) with the at least one bending mandrel (5) around the at least one die (4) and / or ejecting the bar (2) from the at least one device (1).

Images