CN212419246U

CN212419246U - Bending device and bending machine

Info

Publication number: CN212419246U
Application number: CN202021387059.8U
Authority: CN
Inventors: 柳枫; 刘青松
Original assignee: Sany Heavy Equipment Co Ltd
Current assignee: Sany Heavy Equipment Co Ltd
Priority date: 2020-07-15
Filing date: 2020-07-15
Publication date: 2021-01-29
Anticipated expiration: 2030-07-15

Abstract

The utility model provides a bending device and bender, bending device includes: a fixing plate; the turnover plate is pivotally connected with the fixed plate; a drive member; a limiting component; a clamping assembly; wherein, the driving piece can drive the returning face plate and rotate for the fixed plate, and the chucking subassembly is used for the chucking to treat the portion of bending to the messenger treats the portion of bending and rotates along with the returning face plate, and spacing subassembly is used for limiting non-portion of bending and rotates along with the portion of bending together. The technical scheme of the utility model under, under the driving action of driving piece, the returning face plate drives and treats the portion of bending and rotate together, and the portion of non-bending can't rotate together with the portion of bending under the limiting displacement of spacing subassembly, makes like this treat the portion of bending and the relative rotation takes place for the portion of non-bending to realize the bending device and treat the function of bending of the piece of bending.

Description

Bending device and bending machine

Technical Field

The utility model relates to a bender technical field particularly, relates to a bending device and bender.

Background

At present, the tradition is even after adopting machine cutting coal seam to accomplish, need strut with steel mesh cooperation stock, when carrying out automatic unmanned operation, if adopt the steel mesh that equals with the width in tunnel, will lead to steel mesh both sides and cutting surface interference because of the irregularity of cutting surface, if adopt when strutting than the steel mesh that the tunnel width is narrow, must can leave the gap in the both sides in tunnel, strut incompletely, under the normal conditions, utilize two steel meshes to stack the back operation, simultaneously bend the back with the edge of steel mesh before strutting, and fix at tunnel top surface and side, guarantee the integrality of strutting, consequently, need develop a bending device who conveniently uses on the spot urgently.

SUMMERY OF THE UTILITY MODEL

The present invention aims at least solving one of the technical problems existing in the prior art or the related art.

Therefore, an object of the utility model is to provide a bending device.

Another object of the utility model is to provide a bending machine.

In order to achieve the above object, an embodiment of the utility model provides a bending device for bend and treat the piece of bending, treat the piece of bending including treating the portion of bending and with the non-portion of bending of treating the portion of bending to be connected, bending device includes: a fixing plate; the turnover plate is pivotally connected with the fixed plate; the driving piece is provided with a fixed end and a driving end, the fixed end is connected with the fixed plate, and the driving end is connected with the turnover plate; the limiting assembly is arranged on the fixing plate; the clamping assembly is arranged on the turnover plate; wherein, the driving piece can drive the returning face plate and rotate for the fixed plate, and the chucking subassembly is used for the chucking to treat the portion of bending to the messenger treats the portion of bending and rotates along with the returning face plate, and spacing subassembly is used for limiting non-portion of bending and rotates along with the portion of bending to make the portion of bending of treating bend.

In this technical scheme, under the driving action of driving piece, the returning face plate drives and treats the portion of bending and rotate together, and the portion of non-bending can't rotate together with the portion of treating bending under the limiting displacement of spacing subassembly, makes like this to treat the portion of bending and the relative rotation of the portion of non-bending emergence to realize that bending device treats the function of bending of the piece of bending. In addition, in this application, can be through the relative pivoted angle between control returning face plate and the fixed plate to the angle of bending of the piece of waiting to bend is controlled, and then satisfies the requirement of bending of the piece of waiting to bend.

Additionally, the utility model provides an in the above-mentioned embodiment bending device can also have following additional technical characterstic:

in the above technical scheme, spacing subassembly includes: a first gripper; the driving end of the at least one first air cylinder is connected with the first clamping hand.

In the technical scheme, the first cylinder can drive the first clamping hand to move, so that the first clamping hand can clamp a steel mesh to be bent in the second direction, and in the bending process of the bending device, the non-bending part and the fixing plate are limited to move relatively in the second direction, so that the non-bending part is prevented from rotating together with the part to be bent, and the bending device can normally work.

In any one of the above technical scheme, when the limiting assembly comprises a plurality of first cylinders, the plurality of first cylinders are arranged at intervals in the first direction, and the driving ends of the plurality of first cylinders are connected with the first clamping hand.

In this technical scheme, be provided with a plurality of first cylinders in this application, make a plurality of first cylinders can promote first tong simultaneously and remove like this to ensure that first tong can the horizontally remove limiting position, the both ends highly uniform of first tong promptly, and then ensure the block that all R type draw-in grooves on the first tong can be whole with the steel wire of steel mesh, so that the work that bending device can be normal.

In any of the above solutions, the clamping assembly comprises: a second gripper; the fixed end of the second cylinder is connected to the turnover plate; one end of the connecting piece is connected with the second clamping hand, and the other end of the connecting piece is in pivot connection with the driving end of the second air cylinder.

In this technical scheme, the second cylinder can promote the connecting piece and move along first direction, and the connecting piece can drive the second tong and move along first direction like this to make the second tong in first direction chucking steel mesh. Therefore, the turnover plate can drive the part to be bent to rotate together, the bending device can work normally, and the steel mesh can be bent. In addition, because the other end of connecting piece and the drive end pivotal connection of second cylinder, the relative position of second tong and steel mesh is conveniently adjusted like this to ensure that the steel wire of steel mesh can accurately block in the R type draw-in groove of second tong, and then ensure that the chucking subassembly can be with the steel mesh chucking. Before the operation of bending, can aim at second tong and steel wire fast through swivel connected coupler, after the operation of bending is accomplished, can deviate from the steel mesh with the quick follow of second tong through reverse swivel connected coupler, improved bending device's the efficiency of bending like this.

In any one of the above technical solutions, when the clamping assembly includes a plurality of second grippers, the plurality of second grippers are arranged along the second direction, and each second gripper is correspondingly provided with a second cylinder and a connecting member.

In this technical scheme, a plurality of second cylinders promote the second tong for a plurality of second tongs chucking steel mesh. Make the steel mesh atress even like this, the chucking subassembly can be better with the steel mesh chucking to ensure the work that bending device can be normal, the steel mesh can be bent.

In any of the above technical solutions, at least one of the second clamping hands and the other second clamping hands clamp the portion to be bent in the opposite direction, or the second clamping hands clamp the portion to be bent in the same direction.

In the technical scheme, the second clamping hands corresponding to the second cylinders are pushed in opposite directions among the second cylinders, so that the steel mesh is clamped between the second clamping hands in opposite directions. Make the steel mesh atress even like this, the chucking subassembly can be better with the steel mesh chucking to ensure the work that bending device can be normal, the steel mesh can be bent.

In any of the above technical solutions, the bending device further includes a first support plate disposed on the fixing plate, and the first support plate is connected to the first cylinder of the limiting assembly.

In this technical scheme, first cylinder links together through first backup pad and fixed plate, makes first cylinder have stable impetus like this to ensure the work that first cylinder can be normal, and then ensure the work that bending device can be normal, the steel mesh can be bent.

In any of the above technical solutions, the bending device further includes a second support plate disposed on the fixing plate, and the second support plate is pivotally connected to the fixing end of the driving member.

In this technical scheme, the driving piece links together through second backup pad and fixed plate, makes the driving piece have stable impetus like this to ensure the work that the driving piece can be normal, and then ensure the work that bending device can be normal, the steel mesh can be bent.

In any of the above solutions, the driving member comprises a driving cylinder or a hydraulic cylinder.

In the technical scheme, the driving cylinder is widely applied to the field of pneumatic conveying, is an industrial universal part and has high performance-to-cost ratio, so that the subsequent maintenance and replacement of the driving part are facilitated, and the cost of the bending device is saved.

The utility model discloses technical scheme of second aspect provides a bender, bender include as in any one of the technical scheme of the first aspect bending device and the controlling means who is connected with bending device, controlling means can control bending device and treat that the piece of bending is bent.

The utility model discloses the bender that technical scheme of second aspect provided, because of the bending device including any one in the first aspect technical scheme, therefore have all beneficial effects that any above-mentioned technical scheme had, no longer describe herein.

In the above scheme, the bending device and the control device are combined to be arranged, so that the bending machine can bend the steel mesh, the bending time of the bending device and the bending parameters of the steel mesh can be controlled through the control device, such as the bending angle of the steel mesh, the automatic bending function of the bending machine is realized, the bending efficiency of the steel mesh in a construction site is improved, and the progress requirement of site supporting operation is met.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 shows a schematic structural view of a bending apparatus according to an embodiment of the present invention (with steel mesh installed, the steel mesh is in a state to be bent);

FIG. 2 shows a bottom view of the bending apparatus of FIG. 1 (with steel mesh installed, the steel mesh in a ready-to-bend state);

fig. 3 shows another schematic structural view of the bending device in fig. 1 (with steel mesh installed, the steel mesh being in a bent state).

Wherein, the correspondence between the reference numbers and the component names in fig. 1 to 3 is:

10: a fixing plate; 20: a turnover plate; 30: a drive member; 32: a driving end; 34: a fixed end; 40: a limiting component; 42: a first gripper; 44: a first cylinder; 50: a clamping assembly; 52: a second gripper; 54: a second cylinder; 56: a connecting member; 60: a first support plate; 70: a second support plate; 100: a piece to be bent; 102: a part to be bent; 104: a non-bending part.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

It should be noted that the first direction in the present application refers to a vertical direction in fig. 2, and the second direction in the present application refers to a horizontal direction in fig. 2. The utility model discloses reach the utility model discloses bending device in implementing compact structure, and weight is not big, the on-the-spot personnel transport of being convenient for. When the bending device is used, the bending device only needs to be placed on a steel mesh, so that bending operation can be performed, the bending device is convenient to use, is suitable for field bending operation, and has better practicability.

Bending devices according to some embodiments of the present invention are described below with reference to fig. 1 to 3.

As shown in fig. 1 to 3, the utility model provides a bending device for bend and wait to bend piece 100, wait to bend piece 100 including wait to bend portion 102 and with wait that the non-portion 104 that the portion 102 is connected of bending, bending device includes fixed plate 10, returning face plate 20, driving piece 30, spacing subassembly 40 and chucking subassembly 50. Wherein the flipping board 20 is pivotally connected to the fixed board 10, the driving member 30 has a fixed end 34 and a driving end 32, the fixed end 34 is connected to the fixed board 10, and the driving end 32 is connected to the flipping board 20. Spacing subassembly 40 sets up on fixed plate 10, and chucking subassembly 50 sets up on returning face plate 20, and driving piece 30 can drive returning face plate 20 and rotate for fixed plate 10, and chucking subassembly 50 is used for the chucking to wait to bend portion 102 to make and wait that portion 102 rotates along with returning face plate 20 together to bend, and spacing subassembly 40 is used for limiting non-portion 104 of bending and rotates along with waiting to bend portion 102 together, so that the portion 102 of bending is waited to bend.

According to the arrangement, under the driving action of the driving part 30, the turnover plate 20 drives the to-be-bent part 102 to rotate together, and the non-bent part 104 cannot rotate together with the to-be-bent part 102 under the limiting action of the limiting component 40, so that the to-be-bent part 102 and the non-bent part 104 rotate relatively, and the bending function of the to-be-bent part 100 by the bending device is realized. In addition, the bending angle of the to-be-bent piece 100 can be controlled by controlling the relative rotation angle between the turning plate 20 and the fixing plate 10, so that the bending requirement of the to-be-bent piece 100 is met.

It should be noted that the bending device in the present application is applied to the field of coal mining, and is specifically applied to bending of a steel mesh supporting a coal seam after a continuous mining machine cuts the coal seam, and the to-be-bent piece 100 in the present application is a steel mesh for supporting the coal seam.

Specifically, as shown in fig. 1 to 3, in an embodiment of the present invention, the limiting assembly 40 includes a first clamping hand 42 and two first air cylinders 44. Wherein, two first cylinders 44 are arranged at intervals in the first direction, and the driving ends of the two first cylinders 44 are connected with the first clamping hand 42 uniformly.

In the above arrangement, the first air cylinder 44 can drive the first clamping hand 42 to move, so as to ensure that the first clamping hand 42 can clamp the steel mesh of the to-be-bent piece 100 in the second direction, and thus, in the bending process of the bending device, by limiting the relative movement between the non-bent portion 104 and the fixing plate 10 in the second direction, the non-bent portion 104 is prevented from rotating along with the to-be-bent portion 102, so as to ensure that the bending device can work normally.

In addition, two first cylinders 44 are arranged in the bending device, so that the two first cylinders 44 can simultaneously push the first clamping hands 42 to move, and therefore the first clamping hands 42 can horizontally move to the limiting position, namely the two ends of the first clamping hands 42 are identical in height, and all the R-shaped clamping grooves in the first clamping hands 42 can be completely clamped with steel wires of a steel net, and the bending device can normally work.

It should be noted that, the steel mesh comprises a plurality of steel wires staggered arrangement, is provided with a plurality of R type draw-in grooves on the first tong 42 in this application, and R type draw-in groove is used for cooperating with the steel wire chucking, and the steel wire card is gone into in above-mentioned R type draw-in groove promptly. Of course, the steel mesh can be limited by adopting an electromagnet or a permanent magnet according to the actual situation.

Specifically, as shown in fig. 2, in the embodiment of the present invention, the clamping assembly 50 includes a second clamping hand 52, a second cylinder 54 and a connecting member 56. Wherein, the fixed end of the second cylinder 54 is connected to the turning plate 20; one end of the link 56 is connected to the second gripper 52, and the other end of the link 56 is pivotally connected to the driving end of the second cylinder 54.

In the above arrangement, the second cylinder 54 can push the connecting member 56 to move in the first direction, so that the connecting member 56 can drive the second gripper 52 to move in the first direction, so that the second gripper can grip the steel mesh in the first direction. This ensures that the roll-over plate 20 can drive the portion 102 to be bent to rotate together, thereby ensuring that the bending device can work normally and the steel mesh can be bent.

In addition, because the other end of the connecting piece 56 is pivotally connected to the driving end of the second cylinder 54, the relative position between the second clamping hand 52 and the steel mesh can be conveniently adjusted, so that the steel wire of the steel mesh can be accurately clamped into the R-shaped clamping groove of the second clamping hand 52, and the steel mesh can be further clamped by the clamping assembly 50. Before the bending operation, the second clamping handle 52 can be quickly aligned with the steel wire through the rotating connecting piece 56, and after the bending operation is completed, the second clamping handle 52 can be quickly separated from the steel net through the reverse rotating connecting piece 56, so that the bending efficiency of the bending device is improved.

It should be noted that, the structure of the second gripper 52 in the present application is the same as that of the first gripper 42, and the second gripper 52 is also provided with a plurality of R-shaped slots, and the R-shaped slots are used for being tightly fitted with the steel wire of the steel mesh, that is, the steel wire is clamped into the R-shaped slots.

Specifically, as shown in fig. 2, in the embodiment of the present invention, when the clamping assembly 50 includes two second clamping hands 52, the two second clamping hands 52 are arranged along the second direction, and each second clamping hand 52 is correspondingly provided with one second cylinder 54 and one connecting member 56. The two second air cylinders 54 are installed in the first direction in opposite directions, and the two second clamping hands 52 clamp the portion to be bent 102 in opposite directions.

In the above arrangement, the two second air cylinders 54 push the second gripping arms 52 in opposite directions, so that the two second gripping arms 52 grip the steel net in opposite directions. Therefore, the steel mesh is stressed uniformly, the clamping assembly 50 can clamp the steel mesh better, the bending device can work normally, and the steel mesh can be bent.

Specifically, as shown in fig. 1 to 3, in an embodiment of the present invention, the bending apparatus further includes a first supporting plate 60 welded on the fixing plate 10, and the first supporting plate 60 is connected to the fixed end of the first cylinder 44 of the limiting assembly 40.

In the above arrangement, the first cylinder 44 is connected to the fixing plate 10 through the first support plate 60, so that the first cylinder 44 has a stable acting point, thereby ensuring that the first cylinder 44 can work normally, and further ensuring that the bending device can work normally, and the steel mesh can be bent.

Specifically, as shown in fig. 1 to 3, in an embodiment of the present invention, the bending apparatus further includes a second supporting plate 70 welded on the fixing plate 10, and the second supporting plate 70 is pivotally connected to the fixed end 34 of the driving member 30.

In the above arrangement, the driving member 30 is connected to the fixing plate 10 through the second support plate 70, so that the driving member 30 has a stable acting point, thereby ensuring that the driving member 30 can work normally, and further ensuring that the bending device can work normally, and the steel mesh can be bent.

Specifically, as shown in fig. 1 to 3, the driving member 30 includes a driving cylinder, and the driving cylinder is widely applied to the pneumatic conveying field, is an industrial common component, and has a high performance-to-cost ratio, so that subsequent maintenance and replacement of the driving member 30 are facilitated, and the cost of the bending device is saved. Of course, a jack or a hydraulic cylinder can be adopted to swing the cylinder according to the actual situation.

It should be noted that the bending device in this application is placed on the steel mesh, that is, the steel mesh supports the bending device, drives the second tong 52 through the second cylinder 54 on the returning plate 20 in this application and presss from both sides the steel mesh tightly, drives the first tong 42 through the first cylinder 44 of installation on the fixed plate 10 and is spacing with the steel mesh, drives returning plate 20 and the steel mesh and overturns simultaneously through driving the cylinder and realizes the function of bending to the steel mesh.

The utility model also provides a bender, this bender include arbitrary bending device of first aspect embodiment and the controlling means who is connected with this bending device, controlling means can control bending device and bend the steel mesh.

In the above-mentioned setting, set up through bending device and controlling means combination for the bender can be to the steel mesh operation of bending, can control the opportunity of bending the operation of bending device and the bending parameter of steel mesh through controlling means, for example the angle of bending of steel mesh, has realized the automatic function of bending of bender like this, thereby has improved the efficiency of bending of steel mesh in the job site, and then has satisfied the progress requirement of job site support.

The bending apparatus according to the present invention is further provided with a plurality of sensors, and these sensors are connected to the control apparatus and can transmit position information of each moving member in the bending apparatus to the control apparatus.

The utility model discloses technical scheme of second aspect provides a bender because of the bending device including arbitrary one in the first aspect embodiment, therefore has all beneficial effects that arbitrary one of the above-mentioned embodiments had, no longer gives details here.

From the above description, it can be seen that, under the driving action of the driving element 30, the flipping board 20 drives the portion 102 to be bent to rotate together, and the non-bent portion 104 cannot rotate together with the portion 102 to be bent under the limiting action of the limiting component 40, so that the portion 102 to be bent and the non-bent portion 104 rotate relatively, thereby implementing the bending function of the bending device on the portion 100 to be bent. In addition, in this application, the bending angle of the to-be-bent piece 100 can be controlled by controlling the relative rotation angle between the turning plate 20 and the fixing plate 10, so as to meet the bending requirement of the to-be-bent piece 100.

The utility model discloses and the embodiment of the utility model provides an in bending device and bender have following advantage:

1. the turnover mechanism (the turnover plate 20 and the driving piece 30) is integrally arranged above the steel mesh, and simultaneously the steel mesh is turned over to one side of the turnover plate 20, so that the use requirement of the working condition is ensured.

2. The turning action is carried out after all the steel wires on the steel mesh are clamped and limited by the limiting assembly 40.

3. The cylinder and the sensor arranged around the cylinder have the functions of explosion prevention and dust prevention, and can be used for operation in a coal mine tunnel.

4. All power mechanisms adopt pneumatic devices, point position detection adopts a sensor to realize closed-loop feedback, and the whole device is simple and convenient to control.

In the present application, the terms "first", "second", "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or unit indicated must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be construed as limiting the present invention.

In the description of the present specification, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a bending device for bend and wait to bend piece (100), wait to bend piece (100) including wait to bend portion (102) and with wait to bend the portion (104) of non-bending that portion (102) are connected, its characterized in that, bending device includes:

a fixed plate (10);

the turnover plate (20) is pivotally connected with the fixed plate (10);

a driving piece (30) which is provided with a fixed end (34) and a driving end (32), wherein the fixed end (34) is connected with the fixed plate (10), and the driving end (32) is connected with the turnover plate (20);

the limiting assembly (40) is arranged on the fixing plate (10);

the clamping assembly (50) is arranged on the turnover plate (20);

the bending device comprises a driving piece (30), a clamping assembly (50), a limiting assembly (40) and a fixing plate (10), wherein the driving piece (30) can drive the turnover plate (20) to rotate relative to the fixing plate (10), the clamping assembly (50) is used for clamping a part (102) to be bent so that the part (102) to be bent rotates along with the turnover plate (20), and the limiting assembly (40) is used for limiting the non-bent part (104) to rotate along with the part (102) to be bent so that the part (102) to be bent is bent.

2. The bending device according to claim 1, wherein the stop assembly (40) comprises:

a first gripper (42);

the driving end of the at least one first air cylinder (44) is connected with the first clamping hand (42).

3. The bending device according to claim 2, wherein when the limiting assembly (40) comprises a plurality of first air cylinders (44), the first air cylinders (44) are arranged at intervals in a first direction, and driving ends of the first air cylinders (44) are connected with the first clamping hand (42).

4. The bending device according to any one of claims 1 to 3, wherein the clamping assembly (50) comprises:

a second gripper (52);

the fixed end of the second air cylinder (54) is connected to the turnover plate (20);

and one end of the connecting piece (56) is connected with the second clamping hand (52), and the other end of the connecting piece (56) is pivotally connected with the driving end of the second air cylinder (54).

5. The bending apparatus according to claim 4, wherein the clamping assembly (50) includes a plurality of second grippers (52), the plurality of second grippers (52) being arranged in the second direction, each of the second grippers (52) being provided with one of the second air cylinders (54) and one of the connecting members (56).

6. The bending device according to claim 5, wherein at least one of the second clamping hands (52) clamps the portion to be bent (102) in an opposite direction to the other second clamping hands (52), or the second clamping hands (52) clamp the portion to be bent (102) in the same direction.

7. The bending device according to any one of claims 1 to 3, further comprising a first support plate (60) disposed on the fixing plate (10), the first support plate (60) being connected to the first cylinder (44) of the stop assembly (40).

8. The bending device according to any one of claims 1 to 3, further comprising a second support plate (70) arranged on the fixing plate (10), the second support plate (70) being pivotally connected to the fixed end (34) of the drive member (30).

9. The bending device according to any one of claims 1 to 3, wherein the drive (30) comprises a drive cylinder or a hydraulic cylinder.

10. Bending machine, characterized in that it comprises a bending device according to any one of claims 1 to 9 and a control device connected to said bending device, said control device being able to control said bending device to bend an element (100) to be bent.