Stirrup bending production device

By designing a stirrup bending production device including a flexure head and a pushing unit, the problem of high labor intensity caused by manual bending of stirrups in the prior art is solved, and automatic bending and efficient production of stirrups are achieved.

CN222919536UActive Publication Date: 2025-05-30CHINA NUCLEAR IND 22ND CONSTR
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Patent Information

Application Number
CN202422468231.7
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-10-12
Publication Date
2025-05-30
Estimated Expiration
2034-10-12

AI Technical Summary

Technical Problem

In the prior art, stirrups need to be bent manually, resulting in a high labor intensity and a large demand for stirrups on the construction site, making it difficult to meet the demand for efficient production.

Method used

A stirrup bending production device is designed, including a support frame, a flexure head and a pushing unit. The bend head realizes bending of the steel bar through the combination of the upper mounting plate, the first bend block, the second bend block, the rotating column and the lower mounting plate; the pushing unit drives the bend head to move through the first baffle, the second baffle and the moving component to achieve bending of the steel bar at different positions.

Benefits of technology

Automatic bending of stirrups is achieved, reducing manpower use, reducing labor intensity, and improving the efficiency of stirrup production.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model provides a stirrup bending production device, and belongs to the field of stirrup bending devices. Comprising a supporting frame, two bending heads are symmetrically arranged on the supporting frame, the bending heads bend reinforcing steel bars, a reinforcing steel bar section between the two bending heads is a to-be-bent reinforcing steel bar section, a first baffle and a second baffle are movably arranged on the supporting frame, and the moving direction of the first baffle and the moving direction of the second baffle are perpendicular to the center line of the to-be-bent reinforcing steel bar section. The first baffle and the second baffle can limit movement of the reinforcing steel bars, the two bending heads are located between the first baffle and the second baffle and installed at the moving ends of the two moving assemblies correspondingly, and the moving assemblies drive the bending heads to move so as to bend the different positions of the reinforcing steel bars. According to the stirrup bending device, by arranging the two bending heads, a reinforcing steel bar can be bent, bending of different positions of the reinforcing steel bar can be achieved through the arranged moving assembly, and therefore automatic bending of the stirrup is achieved, manpower is reduced, and the labor intensity is reduced.
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Description

Technical Field

[0001] The utility model belongs to the field of stirrup bending devices, and particularly relates to a stirrup bending production device. Background Art

[0002] Stirrups are used to meet the shear strength of inclined sections and connect the stressed main reinforcement and the mixed reinforcement skeleton in the compression zone. They are usually rectangular and are formed by bending a straight reinforcing bar. Currently, when bending stirrups, the operator holds the reinforcing bar and bends it on the bending machine. By holding the reinforcing bar by hand and adjusting its position, different positions of the reinforcing bar can be bent, so as to bend the reinforcing bar into a stirrup. However, currently, stirrups are all manually bent by workers, and the quantity of stirrups required on the construction site is large, resulting in a large workload for the workers. Summary of the Utility Model

[0003] In view of the above-mentioned disadvantages of the prior art, the purpose of the present utility model is to provide a stirrup bending production device, which is used to solve the problem of large labor intensity of workers in manually bending stirrups in the prior art.

[0004] To achieve the above purpose and other related purposes, the present utility model provides a stirrup bending production device, and the production device includes,

[0005] A support frame,

[0006] Two bending heads, which are symmetrically arranged on the support frame. The bending heads bend the reinforcing bar, and the reinforcing bar section between the two bending heads is the reinforcing bar section to be bent;

[0007] A pushing unit, which includes a first baffle, a second baffle and two moving components. The first baffle and the second baffle are both movably arranged on the support frame. The moving directions of the first baffle and the second baffle are perpendicular to the center line of the reinforcing bar section to be bent. The first baffle and the second baffle can limit the movement of the reinforcing bar. The two bending heads are located between the first baffle and the second baffle, and the two bending heads are respectively installed on the moving ends of the two moving components. The moving components drive the bending heads to move to bend different positions of the reinforcing bar.

[0008] As an optional solution, the bending head includes an upper mounting plate, a first bending block, a second bending block, a rotating column, a lower mounting plate and a rotating power source;

[0009] The lower mounting plate is fixedly installed on the mobile end of the moving component. The upper mounting plate is located above the lower mounting plate. The rotating column sequentially penetrates the lower mounting plate and the upper mounting plate from bottom to top. The rotating column is rotatably connected to the lower mounting plate. The axis of rotation of the rotating column is perpendicular to the upper end surface of the lower mounting plate. The rotating column is fixedly connected to the upper mounting plate. The upper end surface of the rotating column extends above the upper mounting plate. The rotational power source drives the rotating column to rotate;

[0010] The first bending block is installed on the upper mounting plate, and the second bending block is installed on the lower mounting plate. The first bending block and the second bending block are parallel to each other. The side wall of the first bending block is in contact with the side wall of the second bending block, and the plane where the contacting side walls are located is the first plane. The axis of the rotating column is located in the first plane;

[0011] The side wall of the first bending block close to the rotating column is the first bending surface, and the side wall of the second bending block close to the rotating column is the second bending surface. When the first bending block and the second bending block are in contact with each other, the first bending surface and the second bending surface are coplanar;

[0012] The first bending surface is parallel to the axis of the rotating column, and the steel bar is placed between the first bending surface and the rotating column;

[0013] The rotation of the upper mounting plate drives the first bending block away from the second bending block, thereby bending the steel bar.

[0014] As an alternative, a number of balls are rollingly installed on the bottom end surface of the upper mounting plate, and the balls roll on the upper end surface of the lower mounting plate.

[0015] As an alternative, the rotational power source is a stepper motor.

[0016] As an alternative, the bending head further includes a first fixing block, a first threaded rod, a second fixing block, a guide rod, and a second threaded rod;

[0017] The first fixing block is fixedly installed on the upper mounting plate. The first bending block is slidably installed on the upper mounting plate. The sliding direction of the first bending block is perpendicular to the first bending surface. One end of the first threaded rod is rotatably connected to the first bending block, and the other end of the first threaded rod penetrates the first fixing block. The first threaded rod is threadedly connected to the first fixing block;

[0018] The second fixing block is fixedly installed on the lower mounting plate. One end of the second threaded rod is rotatably installed on the second bending block, and the other end of the second threaded rod penetrates through the second fixing block. The second threaded rod is threadedly connected to the second fixing block. The axis of rotation of the second threaded rod is perpendicular to the second bending surface. One end of the guide rod is fixedly connected to the second bending block, and the other end of the guide rod slidably penetrates through the second fixing block. The axis of the guide rod is parallel to the axis of the second threaded rod.

[0019] As an alternative, a stop bar is slidably installed on the first bending block. The stop bar is located on the other side wall of the first bending block opposite to the first bending surface, and the stop bar can slide to the rear of the second bending block;

[0020] The distance between the front wall of the stop bar and the first bending surface is a, and the thickness of the second bending block is b, where a = b.

[0021] As an alternative, the moving assembly includes a first hydraulic cylinder, a sliding plate, and a guide rail;

[0022] The guide rail is fixedly installed on the support frame. The sliding plate is slidably connected to the guide rail, and the sliding direction of the sliding plate is parallel to the center line of the steel bar section to be bent;

[0023] The lower mounting plate and the stepping motor are both fixedly connected to the sliding plate;

[0024] The first hydraulic cylinder is fixedly installed on the support frame, and the telescopic end of the first hydraulic cylinder is fixedly connected to the sliding plate.

[0025] As an alternative, a chute is provided on the upper end surface of the guide rail, and a slider is fixedly installed on the bottom end surface of the sliding plate. The slider is slidably connected to the chute.

[0026] As an alternative, a second hydraulic cylinder and a third hydraulic cylinder are also fixedly installed on the support frame;

[0027] The telescopic end of the second hydraulic cylinder is fixedly connected to the first baffle, and the telescopic end of the third hydraulic cylinder is fixedly connected to the second baffle. The telescopic directions of the second hydraulic cylinder and the third hydraulic cylinder are parallel to the center line of the steel bar section to be bent.

[0028] As described above, a stirrup bending production device proposed by the present utility model has at least the following beneficial effects:

[0029] 1. In this application, by providing two bending heads, the steel bar can be bent. By providing the moving assembly, bending at different positions of the steel bar can be achieved, thereby realizing the automatic bending of the stirrup, reducing the use of manpower, and reducing the labor intensity;

[0030] 2. By providing the stop bar in this application, when it is necessary to adjust the distances between the first bending block and the second bending block and the rotating column respectively, the stop bar can ensure the consistency of the adjusted distances. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It shows a schematic structural view of the present utility model;

[0032] Figure 2 It shows the present utility model Figure 1 A partial enlarged view at A in;

[0033] Figure 3 It shows a schematic structural view of the moving assembly and the bending head of the present utility model;

[0034] Figure 4 It shows the present utility model Figure 3 A partial enlarged view at B in;

[0035] Figure 5 It shows a structural cross-sectional view of the upper mounting plate, the lower mounting plate, the rotating column and the ball of the present utility model.

[0036] In the figure: 101, support frame; 102, steel bar;

[0037] 201, upper mounting plate; 202, first bending block; 203, second bending block; 204, rotating column; 205, lower mounting plate; 206, rotating power source; 207, first bending surface; 208, second bending surface; 209, first fixing block; 210, first threaded rod; 211, second fixing block; 212, guide rod; 213, second threaded rod; 214, stop bar; 215, ball;

[0038] 301, first baffle; 302, second baffle; 303, first hydraulic cylinder; 304, sliding plate; 305, guide rail;

[0039] 401, slider; 402, chute;

[0040] 501, second hydraulic cylinder; 502, third hydraulic cylinder. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0041] The following specific embodiments illustrate the implementation manners of the present utility model. Those skilled in the art can easily understand the other advantages and effects of the present utility model from the content disclosed in this specification.

[0042] Please refer to Figures 1 to 5It should be noted that the structures, proportions, sizes, etc. shown in the attached drawings of this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the implementation conditions of the present utility model. Therefore, they do not have substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size, without affecting the efficacy that the present utility model can generate and the purpose that can be achieved, should still fall within the scope covered by the technical content disclosed in the present utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle", and "one" cited in this specification are only for the convenience of clear narration and are not used to limit the scope of implementation of the present utility model. The change or adjustment of their relative relationship, without substantial change in the technical content, should also be regarded as the scope of implementation of the present utility model.

[0043] The following various embodiments are only for illustration. Combinations can be made between the various embodiments, and it is not limited to the content shown in the following single embodiment.

[0044] Please refer to Figures 1 to 5 , the present utility model provides a stirrup bending production device, and the production device includes:

[0045] A support frame 101,

[0046] Two bending heads, the two bending heads are symmetrically arranged on the support frame 101, the bending heads bend the steel bar 102, and the steel bar section between the two bending heads is the steel bar section to be bent;

[0047] The bending head includes an upper mounting plate 201, a first bending block 202, a second bending block 203, a rotating column 204, a lower mounting plate 205, and a rotating power source 206;

[0048] The lower mounting plate 205 is fixedly installed on the moving end of the moving component, the upper mounting plate 201 is located above the lower mounting plate 205, the rotating column 204 sequentially penetrates the lower mounting plate 205 and the upper mounting plate 201 from bottom to top, the rotating column 204 is rotatably connected to the lower mounting plate 205, the rotation axis of the rotating column 204 is perpendicular to the upper end surface of the lower mounting plate 205, the rotating column 204 is fixedly connected to the upper mounting plate 201, the upper end surface of the rotating column 204 extends above the upper mounting plate 201, and the rotating power source 206 drives the rotating column 204 to rotate;

[0049] The rotating power source 206 is a stepping motor;

[0050] The first bending block 202 is installed on the upper mounting plate 201, the second bending block 203 is installed on the lower mounting plate 205, the first bending block 202 and the second bending block 203 are parallel to each other, the side wall of the first bending block 202 is attached to the side wall of the second bending block 203, and the plane where the attached side walls are located is the first plane; the axis of the rotating column 204 is located in the first plane.

[0051] The side wall of the first bending block 202 close to the rotating column 204 is the first bending surface 207, and the side wall of the second bending block 203 close to the rotating column 204 is the second bending surface 208. When the first bending block 202 and the second bending block 203 are attached to each other, the first bending surface 207 and the second bending surface 208 are coplanar.

[0052] The first bending surface 207 is parallel to the axis of the rotating column 204, and the steel bar 102 is placed between the first bending surface 207 and the rotating column 204.

[0053] The rotation of the upper mounting plate 201 drives the first bending block 202 away from the second bending block 203, thereby bending the steel bar 102.

[0054] A pushing unit, the pushing unit includes a first baffle 301, a second baffle 302 and two moving components. The first baffle 301 and the second baffle 302 are both movably arranged on the support frame 101. The moving directions of the first baffle 301 and the second baffle 302 are perpendicular to the center line of the steel bar section to be bent. The first baffle 301 and the second baffle 302 can limit the movement of the steel bar 102. The two bending heads are located between the first baffle 301 and the second baffle 302. The two bending heads are respectively installed on the moving ends of the two moving components. The moving components drive the bending heads to move to bend different positions of the steel bar 102.

[0055] The two bending heads are respectively a first bending head and a second bending head. The two moving components are respectively a first moving component and a second moving component. The first bending head is installed on the moving end of the first moving component. The second bending head is installed on the moving end of the second moving component. The first baffle 301 is located on the left side of the first bending head, and the second baffle 302 is located on the right side of the second bending head.

[0056] When bending, place the left end of the steel bar 102 between the first bending block of the first bending head and the rotating column of the first bending head, and place the right end of the steel bar 102 between the first bending block of the second bending head and the rotating column of the second bending head. At this time, start the stepping motor of the first bending head, which can drive the first bending block of the first bending head to rotate. By cooperating with the second bending block of the first bending head, the left side of the steel bar 102 can be bent. Start the stepping motor of the second bending head, which can drive the first bending block of the second bending head to rotate. By cooperating with the second bending block of the second bending head, the right side of the steel bar 102 can be bent;

[0057] When it is necessary to bend other positions of the steel bar 102, for example, to bend the left side of the steel bar 102 again, move the second baffle 302 to block the right side of the steel bar 102, and the moving end of the first moving component drives the first bending head to move to the right, so as to move the bending position to the right. At this time, the rotation of the first bending block of the first bending head can realize the re-bending of the steel bar 102. By repeating the above steps, the steel bar 102 can be bent into stirrups multiple times.

[0058] In this embodiment, please refer to Figures 1 to 5 , a plurality of balls 215 are rollingly installed on the bottom end surface of the upper mounting plate 201, and the balls 215 roll on the upper end surface of the lower mounting plate 205.

[0059] The number of the balls 215 is at least 2 and is arranged in an equiangular array along the axis of the rotating column 204. By providing the balls 215, support can be provided for the upper mounting plate 201. At the same time, since the balls 215 roll on the upper end surface of the lower mounting plate 205, that is, there is a point contact between the balls 215 and the upper end surface of the lower mounting plate 205, the friction between the balls 215 and the upper end surface of the lower mounting plate 205 can be reduced.

[0060] In this embodiment, please refer to Figures 1 to 5 , the bending head further includes a first fixing block 209, a first threaded rod 210, a second fixing block 211, a guide rod 212 and a second threaded rod 213;

[0061] The first fixing block 209 is fixedly installed on the upper mounting plate 201. The first bending block 202 is slidably installed on the upper mounting plate 201. The sliding direction of the first bending block 202 is perpendicular to the first bending surface 207. One end of the first threaded rod 210 is rotatably connected to the first bending block 202, and the other end of the first threaded rod 210 penetrates through the first fixing block 209. The first threaded rod 210 is threadedly connected to the first fixing block 209;

[0062] The second fixing block 211 is fixedly installed on the lower mounting plate 205. One end of the second threaded rod 213 is rotatably installed on the second bending block 203, and the other end of the second threaded rod 213 penetrates through the second fixing block 211. The second threaded rod 213 is threadedly connected to the second fixing block 211. The rotation axis of the second threaded rod 213 is perpendicular to the second bending surface 208. One end of the guide rod 212 is fixedly connected to the second bending block 203, and the other end of the guide rod 212 slidably penetrates through the second fixing block 211. The axis of the guide rod 212 is parallel to the axis of the second threaded rod 213.

[0063] When bending steel bars 102 with different diameters, it is necessary to adjust the distance between the first bending block 202 and the second bending block 203 and the rotating column 204. At this time, rotate the first threaded rod 210 and the second threaded rod 213, and the positions of the first bending block 202 and the second bending block 203 can be adjusted, so as to realize the clamping and bending of steel bars 102 with different diameters.

[0064] In this embodiment, please refer to Figures 1 to 5 , a retaining strip 214 is slidably installed on the first bending block 202. The retaining strip 214 is located on the other side wall of the first bending block 202 opposite to the first bending surface 207, and the retaining strip 214 can slide to the rear of the second bending block 203;

[0065] The distance between the front wall of the retaining strip 214 and the first bending surface 207 is a, and the thickness of the second bending block 203 is b, and a = b.

[0066] When bending steel bars 102 with different diameters, it is necessary to ensure that the moving distances of the first bending block 202 and the second bending block 203 are equal, which can be achieved by the provided retaining strip 214.

[0067] When replacing the steel bar 102 with a larger diameter, first rotate the first threaded rod 210 to move the first bending block 202 backward, and then slide the retaining strip 214 to the rear of the second bending block 203. At this time, rotate the second threaded rod 213 to move the second bending block 203 backward. When the rear wall of the second bending block 203 is in contact with the front wall of the retaining strip 214, it indicates that the first bending block 202 and the second bending block 203 have been adjusted in place.

[0068] In this embodiment, please refer to Figures 1 to 5 , the moving assembly includes a first hydraulic cylinder 303, a sliding plate 304 and a guide rail 305;

[0069] The guide rail 305 is fixedly installed on the support frame 101. The sliding plate 304 is slidably connected to the guide rail 305. The sliding direction of the sliding plate 304 is parallel to the center line of the steel bar section to be bent;

[0070] A chute 402 is formed on the upper end surface of the guide rail 305, and a slider 401 is fixedly installed on the bottom end surface of the sliding plate 304. The slider 401 is slidably connected to the chute 402;

[0071] Both the lower mounting plate 205 and the stepping motor are fixedly connected to the sliding plate 304;

[0072] The first hydraulic cylinder 303 is fixedly installed on the support frame 101, and the telescopic end of the first hydraulic cylinder 303 is fixedly connected to the sliding plate 304.

[0073] Starting the first hydraulic cylinder 303 can drive the sliding plate 304 to slide, thereby driving the lower mounting plate 205 to move.

[0074] In this embodiment, please refer to Figures 1 to 5 , and a second hydraulic cylinder 501 and a third hydraulic cylinder 502 are also fixedly installed on the support frame 101;

[0075] The telescopic end of the second hydraulic cylinder 501 is fixedly connected to the first baffle 301, and the telescopic end of the third hydraulic cylinder 502 is fixedly connected to the second baffle 302. The telescopic directions of the second hydraulic cylinder 501 and the third hydraulic cylinder 502 are parallel to the center line of the reinforcing bar section to be bent.

[0076] Starting the second hydraulic cylinder 501 can drive the first baffle 301 to move, and starting the third hydraulic cylinder 502 can drive the second baffle 302 to move.

[0077] The above embodiments merely illustrate the principles and effects of the present invention, rather than limiting the present invention. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A stirrup bending production device, characterized in that: The production device comprises: Support frame, Two bending heads, the two bending heads are symmetrically arranged on the support frame, the bending heads bend the steel bars, and the steel bar segment between the two bending heads is the steel bar segment to be bent; A pushing unit, the pushing unit includes a first baffle, a second baffle and two moving components, the first baffle and the second baffle are both movably arranged on a support frame, the moving directions of the first baffle and the second baffle are perpendicular to the center line of the steel bar segment to be bent, the first baffle and the second baffle can limit the movement of the steel bar, the two bending heads are located between the first baffle and the second baffle, the two bending heads are respectively installed on the moving ends of the two moving components, and the moving components drive the bending heads to move to bend different positions of the steel bar.

2. A stirrup bending production device according to claim 1, characterized in that: The bending head comprises an upper mounting plate, a first bending block, a second bending block, a rotating column, a lower mounting plate and a rotating power source; The lower mounting plate is fixedly mounted on the moving end of the moving assembly, the upper mounting plate is located above the lower mounting plate, the rotating column sequentially penetrates the lower mounting plate and the upper mounting plate from bottom to top, the rotating column is rotatably connected to the lower mounting plate, the rotating axis of the rotating column is perpendicular to the upper end surface of the lower mounting plate, the rotating column is fixedly connected to the upper mounting plate, the upper end surface of the rotating column extends to the upper end of the upper mounting plate, and the rotating power source drives the rotating column to rotate; The first bending block is mounted on the upper mounting plate, the second bending block is mounted on the lower mounting plate, the first bending block is parallel to the second bending block, the side wall of the first bending block is in contact with the side wall of the second bending block, and the plane where the in contact side walls are located is a first plane, and the axis of the rotating column is located in the first plane; The side wall of the first bending block close to the rotating column is a first bending surface, and the side wall of the second bending block close to the rotating column is a second bending surface. When the first bending block and the second bending block are attached, the first bending surface and the second bending surface are coplanar; The first bending surface is parallel to the axis of the rotating column, and the steel bar is placed between the first bending surface and the rotating column; The upper mounting plate rotates to drive the first bending block away from the second bending block, thereby bending the steel bar.

3. A stirrup bending production device according to claim 2, characterized in that: A plurality of balls are rollingly mounted on the bottom end surface of the upper mounting plate, and the balls roll on the upper end surface of the lower mounting plate.

4. A stirrup bending production device according to claim 2, characterized in that: The rotation power source is a stepping motor.

5. A stirrup bending production device according to claim 2, characterized in that: The bending head also includes a first fixing block, a first threaded rod, a second fixing block, a guide rod and a second threaded rod; The first fixing block is fixedly mounted on the upper mounting plate, the first bending block is slidably mounted on the upper mounting plate, the sliding direction of the first bending block is perpendicular to the first bending surface, one end of the first threaded rod is rotatably connected to the first bending block, the other end of the first threaded rod passes through the first fixing block, and the first threaded rod is threadedly connected to the first fixing block; The second fixed block is fixedly mounted on the lower mounting plate, one end of the second threaded rod is rotatably mounted on the second bending block, the other end of the second threaded rod passes through the second fixed block, the second threaded rod is threadedly connected to the second fixed block, the rotation axis of the second threaded rod is perpendicular to the second bending surface, one end of the guide rod is fixedly connected to the second bending block, the other end of the guide rod slides through the second fixed block, and the axis of the guide rod is parallel to the axis of the second threaded rod.

6. A stirrup bending production device according to claim 5, characterized in that: A baffle is slidably mounted on the first bending block, the baffle is located on the other side wall of the first bending block opposite to the first bending surface, and the baffle can slide to the rear of the second bending block; The distance between the front wall of the baffle and the first bending surface is a, the thickness of the second bending block is b, and a=b.

7. A stirrup bending production device according to claim 4, characterized in that: The moving assembly includes a first hydraulic cylinder, a sliding plate and a guide rail; The guide rail is fixedly mounted on the support frame, the sliding plate is slidably connected to the guide rail, and the sliding direction of the sliding plate is parallel to the center line of the steel bar segment to be bent; The lower mounting plate and the stepper motor are both fixedly connected to the sliding plate; The first hydraulic cylinder is fixedly mounted on the support frame, and the telescopic end of the first hydraulic cylinder is fixedly connected to the sliding plate.

8. A stirrup bending production device according to claim 7, characterized in that: The upper end surface of the guide rail is provided with a sliding groove, and the bottom end surface of the sliding plate is fixedly mounted with a sliding block, and the sliding block is slidably connected with the sliding groove.

9. A stirrup bending production device according to claim 1, characterized in that: The support frame is also fixedly mounted with a second hydraulic cylinder and a third hydraulic cylinder; The telescopic end of the second hydraulic cylinder is fixedly connected to the first baffle, and the telescopic end of the third hydraulic cylinder is fixedly connected to the second baffle. The telescopic directions of the second hydraulic cylinder and the third hydraulic cylinder are parallel to the center line of the steel bar segment to be bent.