High-accuracy bending device for steel structure production

Abstract

The utility model discloses a high-accuracy bending device for steel structure production, which belongs to the technical field of steel pipe bending and comprises a workbench, a moving device is arranged on the upper surface of the workbench, and the moving device comprises a first shell. By arranging a moving device, an infrared emitter and an infrared emitter, when people need to move a steel pipe, people only need to control a first positive and negative motor to operate through a control switch so as to drive a first threaded column to rotate, and under the cooperation of the first threaded column and a threaded cap, a connecting plate is driven to move; and under the cooperation of an infrared transmitter and an infrared receiver, the moving distance of the connecting plate is accurately detected, so that the steel pipe is accurately moved, the accuracy of bending the steel pipe is improved, manual adjustment operation is not needed, the automation degree is high, and the practicability of the device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of steel pipe bending, and more specifically, it relates to a bending device with high accuracy for steel structure production. Background Technique

[0002] Steel structure buildings have been widely accepted by people due to their advantages of easy erection and disassembly, recyclable raw materials, and high stability. In steel structures, steel pipes are the main connecting components. When producing steel structures, steel pipes need to be bent according to the structure type, and a steel pipe bending device is required. Since some steel pipes in steel structures have shapes with more than just a single bending point, the existing devices cannot perform multiple non-coplanar bends on a single steel pipe at one time and cannot accurately move the steel pipe, which is rather inconvenient. To solve the above problems, we have developed the following device. Content of the Utility Model

[0003] Technical Problems to be Solved

[0004] Aiming at the deficiencies of the existing technology, the purpose of the utility model is to provide a bending device with high accuracy for steel structure production, which has the characteristics of performing multiple non-coplanar bends on a single steel pipe at one time and being able to accurately move the steel pipe.

[0005] Technical Solution

[0006] To achieve the above purpose, the utility model provides a bending device with high accuracy for steel structure production, including a workbench. A moving device is arranged on the upper surface of the workbench. The moving device includes a first outer shell, and the first outer shell is fixedly connected to the upper surface of the workbench. A first forward and reverse motor is fixedly connected inside the first outer shell. The other end of the output shaft of the first forward and reverse motor is fixedly connected to a first threaded column. The other end of the first threaded column is fixedly connected to a first rotating shaft. A first bearing is fixedly connected inside the first outer shell. The other end of the first rotating shaft passes through the inside of the first bearing. A threaded cap is threadedly connected to the surface of the first threaded column. The upper end of the threaded cap is fixedly connected to a first connecting rod. A first limiting groove is formed on the upper surface of the first outer shell, and the first connecting rod is movably connected inside the first limiting groove. A second outer shell is arranged on the side of the first outer shell, and the second outer shell is fixedly connected to the upper surface of the workbench. A sliding rod is fixedly connected inside the second outer shell. A sliding sleeve is slidably connected to the surface of the sliding rod. The upper end of the sliding sleeve is fixedly connected to a second connecting rod. A second limiting groove is formed on the upper surface of the second outer shell, and the second connecting rod is movably connected inside the second limiting groove. A connecting plate is fixedly connected between the first connecting rod and the second connecting rod. A first fixing plate is fixedly connected to the upper surface of the workbench. An infrared emitter is fixedly connected to the upper surface of the first fixing plate. An infrared receiver is fixedly connected to the side of the connecting plate. The infrared emitter and the infrared receiver are arranged opposite to each other left and right.

[0007] When using a highly accurate bending device for steel structure production according to this technical solution, by setting a moving device, an infrared emitter and an infrared receiver, when people need to move a steel pipe, they only need to control the operation of the first forward and reverse motor through the control switch, thereby driving the rotation of the first threaded column. With the cooperation of the first threaded column and the threaded nut, the connecting plate is driven to move. With the cooperation of the infrared emitter and the infrared receiver, the moving distance of the connecting plate is accurately detected, so as to accurately move the steel pipe, improve the accuracy of the steel pipe during bending, eliminate the need for manual adjustment operations, and has a high degree of automation, improving the practicality of the device.

[0008] Furthermore, a clamping device is arranged on the upper surface of the connecting plate. The clamping device includes a fixed block, which is fixedly connected to the upper surface of the connecting plate. A first U-shaped plate is fixedly connected to the side of the fixed block. A second forward and reverse motor is fixedly connected inside the first U-shaped plate. The other end of the output shaft of the second forward and reverse motor is fixedly connected to a second rotating shaft. A second bearing is provided through the side of the fixed block, and the second rotating shaft is arranged inside the second bearing. The other end of the second rotating shaft is fixedly connected to a second U-shaped plate. A third bearing is provided through the upper surface of the second U-shaped plate, and a third rotating shaft is arranged inside the third bearing. The upper end of the third rotating shaft is fixedly connected to a torsion cap, and the lower end of the third rotating shaft is fixedly connected to a second threaded column. The lower end surface of the second threaded column is threadedly connected to a first threaded pipe. The lower end of the first threaded pipe is fixedly connected to a first arc-shaped plate. A first telescopic rod is fixedly connected to the upper surface of the first arc-shaped plate, and the upper end of the first telescopic rod is fixedly connected to the upper inner surface of the second U-shaped plate. There are two first telescopic rods, and they are symmetrically arranged at the upper end of the first arc-shaped plate. A first fixed rod is fixedly connected to the lower inner surface of the second U-shaped plate, and the upper end of the first fixed rod is fixedly connected to a second arc-shaped plate. The first arc-shaped plate and the second arc-shaped plate correspond to each other up and down.

[0009] Furthermore, a bending assembly is arranged on the upper surface of the workbench. The bending assembly includes two second fixing plates, which are symmetrically arranged at the upper end of the workbench. A second fixed rod is rotatably connected between the two fixing plates. There are two second fixed rods, and they are symmetrically arranged between the two fixing plates. Four first limiting rollers are fixedly connected to the surfaces of the two second fixed rods, and they are symmetrically arranged on the surfaces of the two second fixed rods. The clamping device and the bending assembly correspond to each other left and right.

[0010] Further, a hydraulic cylinder is fixedly connected to the upper surface of the workbench. The upper end of the hydraulic cylinder is fixedly connected to a third U-shaped plate. A third fixed rod is rotatably connected inside the third U-shaped plate. A second limiting roller is fixedly connected to the surface of the third fixed rod. There are two groups of the second limiting rollers, and they are symmetrically arranged on the surface of the third fixed rod.

[0011] Further, a slider is fixedly connected to the lower end of the connecting plate. A chute is formed on the upper surface of the first fixing plate. The slider is slidably connected inside the chute. A base is arranged below the workbench. A third outer shell is fixedly connected to the upper surface of the base. A third forward and reverse motor is fixedly connected to the lower surface inside the third outer shell.

[0012] Further, the upper end of the output shaft of the third forward and reverse motor is fixedly connected to a fourth rotating shaft. The upper end of the fourth rotating shaft is fixedly connected to a third threaded column. The upper end of the third threaded column is threadedly connected to a second threaded tube. The upper end of the second threaded tube is fixedly connected to the lower surface of the workbench.

[0013] Further, a second telescopic rod is fixedly connected to the upper surface of the base. The upper end of the second telescopic rod is fixedly connected to the lower surface of the workbench. There are two second telescopic rods, and they are symmetrically arranged at the lower end of the workbench. A control switch is fixedly connected to the side of the workbench.

[0014] Beneficial effects

[0015] In summary, the present utility model has the following beneficial effects:

[0016] 1. For the high-accuracy bending device for steel structure production, by setting the moving device, infrared emitter and infrared receiver, when people need to move the steel pipe, people only need to control the operation of the first forward and reverse motor through the control switch, thereby driving the rotation of the first threaded column. With the cooperation of the first threaded column and the threaded nut, the connecting plate is driven to move. With the cooperation of the infrared emitter and the infrared receiver, the moving distance of the connecting plate is accurately detected, so as to accurately move the steel pipe, improve the accuracy of the steel pipe during bending, eliminate the need for manual adjustment operation, have a high degree of automation, and improve the practicability of the device;

[0017] 2. The highly accurate bending device for steel structure production, by setting the clamping device and the bending assembly, when people need to perform multiple non-coplanar bends on a steel pipe, people only need to twist the nut, thereby driving the third rotating shaft to rotate. Under the cooperation of the second threaded column and the first threaded pipe, the first arc-shaped plate is moved. Under the cooperation of the first arc-shaped plate and the second arc-shaped plate, the steel pipe is fixed. By controlling the switch to control the operation of the second forward and reverse motor, the second U-shaped plate is driven to rotate. After rotating to the appropriate angle, under the cooperation of the hydraulic cylinder, the third U-shaped plate is driven to move. Under the cooperation of the first limiting roller and the second limiting roller, the purpose of performing multiple non-coplanar bends on the steel pipe is completed, improving the practicability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are only one embodiment of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0019] Figure 1 It is a schematic structural diagram of the front view three-dimensional section of the present invention;

[0020] Figure 2 It is a schematic structural diagram of the front view three-dimensional of the present invention;

[0021] Figure 3 It is a schematic structural diagram of the enlarged three-dimensional of the moving device of the present invention;

[0022] Figure 4 It is a schematic structural diagram of the enlarged three-dimensional of the clamping device of the present invention;

[0023] Figure 5 It is a schematic structural diagram of the enlarged three-dimensional of the bending assembly of the present invention.

[0024] The reference signs in the drawings are:

[0025] 1. Workbench; 2. Moving device; 201. First housing; 202. First forward and reverse motor; 203. First threaded column; 204. First rotating shaft; 205. First bearing; 206. Threaded nut; 207. First connecting rod; 208. First limiting groove; 209. Second housing; 210. Slide bar; 211. Slide sleeve; 212. Second connecting rod; 213. Second limiting groove; 3. Connecting plate; 4. First fixing plate; 5. Infrared emitter; 6. Infrared receiver; 7. Clamping device; 701. Fixed block; 702. First U-shaped plate; 703. Second forward and reverse motor; 704. Second rotating shaft; 705. Second bearing; 706. Second U-shaped plate; 707. Third bearing; 708. Third rotating shaft; 709. Twisting nut; 710. Second threaded column; 711. First threaded pipe; 712. First arc-shaped plate; 713. First telescopic rod; 714. First fixed rod; 715. Second arc-shaped plate; 8. Bending assembly; 801. Second fixing plate; 802. Second fixed rod; 803. First limiting roller; 804. Hydraulic cylinder; 805. Third U-shaped plate; 806. Third fixed rod; 807. Second limiting roller; 9. Slide block; 10. Slide groove; 11. Base; 12. Third housing; 13. Third forward and reverse motor; 14. Fourth rotating shaft; 15. Third threaded column; 16. Second threaded pipe; 17. Second telescopic rod; 18. Control switch. Detailed implementation manners

[0026] In order to make the technical means, creative features, achieved purposes and effects realized by the present utility model easy to understand, the technical solutions in the specific implementation manners of the present utility model are clearly and completely described below to further elaborate the present utility model. Obviously, the described specific implementation manners are only a part of the implementation manners of the present utility model, rather than all the styles.

[0027] Embodiment:

[0028] The following is further described in detail with reference to the attached Figures 1-5 This utility model is further described in detail.

[0029] Please refer to Figures 1-5, the present utility model provides a technical solution: a high-accuracy bending device for steel structure production, including a workbench 1. A moving device 2 is arranged on the upper surface of the workbench 1. The moving device 2 includes a first outer shell 201, and the first outer shell 201 is fixedly connected to the upper surface of the workbench 1. A first forward and reverse motor 202 is fixedly connected inside the first outer shell 201. The other end of the output shaft of the first forward and reverse motor 202 is fixedly connected to a first threaded column 203. The other end of the first threaded column 203 is fixedly connected to a first rotating shaft 204. A first bearing 205 is fixedly connected inside the first outer shell 201. The other end of the first rotating shaft 204 passes through the inside of the first bearing 205. A threaded cap 206 is threadedly connected to the surface of the first threaded column 203. The upper end of the threaded cap 206 is fixedly connected to a first connecting rod 207. A first limiting groove 208 is formed on the upper surface of the first outer shell 201. The first connecting rod 207 is movably connected inside the first limiting groove 208. A second outer shell 209 is arranged on the side of the first outer shell 201. The second outer shell 209 is fixedly connected to the upper surface of the workbench 1. A sliding rod 210 is fixedly connected inside the second outer shell 209. A sliding sleeve 211 is slidably connected to the surface of the sliding rod 210. The upper end of the sliding sleeve 211 is fixedly connected to a second connecting rod 212. A second limiting groove 213 is formed on the upper surface of the second outer shell 209. The second connecting rod 212 is movably connected inside the second limiting groove 213. A connecting plate 3 is fixedly connected between the first connecting rod 207 and the second connecting rod 212. A first fixing plate 4 is fixedly connected to the upper surface of the workbench 1. An infrared emitter 5 is fixedly connected to the upper surface of the first fixing plate 4. An infrared receiver 6 is fixedly connected to the side of the connecting plate 3. The infrared emitter 5 and the infrared receiver 6 are arranged opposite to each other left and right.

[0030] By adopting the above technical solution, for the high-accuracy bending device for steel structure production, through the arrangement of the moving device 2, the infrared emitter 5 and the infrared receiver 5, when people need to move the steel pipe, people only need to control the operation of the first forward and reverse motor 202 through the control switch 18, so as to drive the rotation of the first threaded column 203. Under the cooperation of the first threaded column 203 and the threaded cap 206, the connecting plate 3 is driven to move. Under the cooperation of the infrared emitter 5 and the infrared receiver 6, the moving distance of the connecting plate 3 is accurately detected, so as to accurately move the steel pipe, improve the accuracy of the steel pipe during bending, eliminate the need for manual adjustment operations, and has a high degree of automation, thereby improving the practicability of the device.

[0031] Specifically, a clamping device 7 is provided on the upper surface of the connecting plate 3. The clamping device 7 includes a fixed block 701 which is fixedly connected to the upper surface of the connecting plate 3. A first U-shaped plate 702 is fixedly connected to the side of the fixed block 701. A second forward and reverse motor 703 is fixedly connected inside the first U-shaped plate 702. The other end of the output shaft of the second forward and reverse motor 703 is fixedly connected to a second rotating shaft 704. A second bearing 705 is provided through the side of the fixed block 701, and the second rotating shaft 704 is arranged inside the second bearing 705. The other end of the second rotating shaft 704 is fixedly connected to a second U-shaped plate 706. A third bearing 707 is provided through the upper surface of the second U-shaped plate 706, and a third rotating shaft 708 is arranged inside the third bearing 707. The upper end of the third rotating shaft 708 is fixedly connected to a torsion cap 709, and the lower end of the third rotating shaft 708 is fixedly connected to a second threaded column 710. The lower end surface of the second threaded column 710 is threadedly connected to a first threaded tube 711, and the lower end of the first threaded tube 711 is fixedly connected to a first arc-shaped plate 712. A first telescopic rod 713 is fixedly connected to the upper surface of the first arc-shaped plate 712, and the upper end of the first telescopic rod 713 is fixedly connected to the upper inner surface of the second U-shaped plate 706. There are two first telescopic rods 713, and they are symmetrically arranged at the upper end of the first arc-shaped plate 712. A first fixing rod 714 is fixedly connected to the lower inner surface of the second U-shaped plate 706, and the upper end of the first fixing rod 714 is fixedly connected to a second arc-shaped plate 715. The first arc-shaped plate 712 and the second arc-shaped plate 715 correspond to each other up and down.

[0032] By adopting the above technical solution, for the bending device with high accuracy used for steel structure production, by setting the clamping device 7 and the bending assembly 8, when people need to perform multi-point non-coplanar bending on a steel pipe, people only need to twist the torsion cap 709, thereby driving the third rotating shaft 708 to rotate. Under the cooperation of the second threaded column 710 and the first threaded tube 711, the first arc-shaped plate 712 is moved. Under the cooperation of the first arc-shaped plate 712 and the second arc-shaped plate 715, the steel pipe is fixed. By controlling the switch 18 to operate the second forward and reverse motor 703, thereby driving the second U-shaped plate 706 to rotate. After rotating to a suitable angle, under the cooperation of the hydraulic cylinder 804, the third U-shaped plate 805 is driven to move. Under the cooperation of the first limiting roller 803 and the second limiting roller 807, the purpose of performing multi-point non-coplanar bending on the steel pipe is completed, improving the practicability of the device.

[0033] Specifically, a bending assembly 8 is arranged on the upper surface of the workbench 1. The bending assembly 8 includes second fixing plates 801. There are two groups of second fixing plates 801, and they are symmetrically arranged at the upper end of the workbench 1. A second fixing rod 802 is rotatably connected between the two groups of fixing plates 801. There are two groups of second fixing rods 802, and they are symmetrically arranged between the two groups of fixing plates 801. Four first limiting rollers 803 are fixedly connected to the surfaces of the two groups of second fixing rods 802. There are four first limiting rollers 803, and they are symmetrically arranged on the surfaces of the two groups of second fixing rods 802. The clamping device 7 and the bending assembly 8 are arranged opposite to each other left and right.

[0034] Specifically, a hydraulic cylinder 804 is fixedly connected to the upper surface of the workbench 1. The upper end of the hydraulic cylinder 804 is fixedly connected to a third U-shaped plate 805. A third fixing rod 806 is rotatably connected inside the third U-shaped plate 805. A second limiting roller 807 is fixedly connected to the surface of the third fixing rod 806. There are two groups of second limiting rollers 807, and they are symmetrically arranged on the surface of the third fixing rod 806.

[0035] Specifically, a slider 9 is fixedly connected to the lower end of the connecting plate 3. A chute 10 is opened on the upper surface of the first fixing plate 4. The slider 9 is slidably connected inside the chute 10. A base 11 is arranged below the workbench 1. A third outer shell 12 is fixedly connected to the upper surface of the base 11. A third positive and negative motor 13 is fixedly connected to the lower surface inside the third outer shell 12.

[0036] Specifically, the upper end of the output shaft of the third positive and negative motor 13 is fixedly connected to a fourth rotating shaft 14. The upper end of the fourth rotating shaft 14 is fixedly connected to a third threaded column 15. The upper end of the third threaded column 15 is threadedly connected to a second threaded tube 16. The upper end of the second threaded tube 16 is fixedly connected to the lower surface of the workbench 1.

[0037] Specifically, a second telescopic rod 17 is fixedly connected to the upper surface of the base 11. The upper end of the second telescopic rod 17 is fixedly connected to the lower surface of the workbench 1. There are two second telescopic rods 17, and they are symmetrically arranged at the lower end of the workbench 1. A control switch 18 is fixedly connected to the side surface of the workbench 1.

[0038] The working principle of the present utility model is as follows: When in use, people only need to control the operation of the third forward and reverse motor 13 through the control switch 18, thereby driving the rotation of the third threaded column 15. With the cooperation of the third threaded column 15 and the second threaded pipe 16, it is convenient for people to adjust the height of the workbench 1, making the device applicable to different operators. People only need to control the operation of the first forward and reverse motor 202 through the control switch 18, thereby driving the rotation of the first threaded column 203. With the cooperation of the first threaded column 203 and the threaded nut 206, the connecting plate 3 is driven to move. With the cooperation of the infrared emitter 5 and the infrared receiver 6, the moving distance of the connecting plate 3 is accurately detected, so as to accurately move the steel pipe, improving the accuracy of the steel pipe during bending. There is no need for manual adjustment operation, and the degree of automation is high. When people need to perform multi-point non-coplanar bending on the steel pipe, people only need to twist the torsion cap 709, thereby driving the rotation of the third rotating shaft 708. With the cooperation of the second threaded column 710 and the first threaded pipe 711, the first arc-shaped plate 712 is moved. With the cooperation of the first arc-shaped plate 712 and the second arc-shaped plate 715, the steel pipe is fixed. By controlling the operation of the second forward and reverse motor 703 through the control switch 18, the second U-shaped plate 706 is driven to rotate. After rotating to a suitable angle, with the cooperation of the hydraulic cylinder 804, the third U-shaped plate 805 is driven to move. With the cooperation of the first limiting roller 803 and the second limiting roller 807, the purpose of performing multi-point non-coplanar bending on the steel pipe is completed, improving the practicability of the device.

[0039] This specific embodiment is only an explanation of the present utility model, and it is not a limitation of the present utility model. Those skilled in the art can make modifications to this embodiment without creative contributions according to needs after reading this specification, but as long as it is within the scope of the claims of the present utility model, it is protected by the patent law.

Claims

1. A high-precision bending device for steel structure production, comprising a workbench (1), characterized in that: The upper surface of the workbench (1) is provided with a moving device (2), and the moving device (2) comprises a first shell (201), the first shell (201) is fixedly connected to the upper surface of the workbench (1), a first forward and reverse motor (202) is fixedly connected inside the first shell (201), the other end of the output shaft of the first forward and reverse motor (202) is fixedly connected to a first threaded column (203), the other end of the first threaded column (203) is fixedly connected to a first rotating shaft (204), a first bearing (205) is fixedly connected inside the first shell (201), the other end of the first rotating shaft (204) is inserted into the first bearing (205), a threaded cap (206) is threadedly connected to the surface of the first threaded column (203), the upper end of the threaded cap (206) is fixedly connected to a first connecting rod (207), a first limiting groove (208) is provided on the upper surface of the first shell (201), and the first connecting rod (207) is movably connected to the first limiting groove (208) 208), a second shell (209) is arranged on the side of the first shell (201), the second shell (209) is fixedly connected to the upper surface of the workbench (1), a sliding rod (210) is fixedly connected inside the second shell (209), a sliding sleeve (211) is slidably connected to the surface of the sliding rod (210), a second connecting rod (212) is fixedly connected to the upper end of the sliding sleeve (211), a second limiting groove (213) is opened on the upper surface of the second shell (209), the second connecting rod (212) is movably connected inside the second limiting groove (213), a connecting plate (3) is fixedly connected between the first connecting rod (207) and the second connecting rod (212), a first fixing plate (4) is fixedly connected to the upper surface of the workbench (1), an infrared transmitter (5) is fixedly connected to the upper surface of the first fixing plate (4), an infrared receiver (6) is fixedly connected to the side of the connecting plate (3), and the infrared transmitter (5) and the infrared receiver (6) correspond to each other on the left and right.

2. A high-precision bending device for steel structure production according to claim 1, characterized in that: The upper surface of the connecting plate (3) is provided with a clamping device (7), and the clamping device (7) comprises a fixing block (701), the fixing block (701) is fixedly connected to the upper surface of the connecting plate (3), a first U-shaped plate (702) is fixedly connected to the side of the fixing block (701), a second forward and reverse motor (703) is fixedly connected inside the first U-shaped plate (702), a second rotating shaft (704) is fixedly connected to the other end of the output shaft of the second forward and reverse motor (703), a second bearing (705) is passed through the side of the fixing block (701), the second rotating shaft (704) is passed through the inside of the second bearing (705), the other end of the second rotating shaft (704) is fixedly connected to the second U-shaped plate (706), a third bearing (707) is passed through the upper surface of the second U-shaped plate (706), a third rotating shaft (708) is passed through the inside of the third bearing (707), and the third rotating shaft (708) is passed through. 08) The upper end is fixedly connected with a twist cap (709), the lower end of the third rotating shaft (708) is fixedly connected with a second threaded column (710), the lower end surface of the second threaded column (710) is threadedly connected with a first threaded tube (711), the lower end of the first threaded tube (711) is fixedly connected with a first arc-shaped plate (712), the upper surface of the first arc-shaped plate (712) is fixedly connected with a first telescopic rod (713), the upper end of the first telescopic rod (713) is fixedly connected to the inner upper surface of the second U-shaped plate (706), there are two first telescopic rods (713), and they are symmetrically arranged on the upper end of the first arc-shaped plate (712), the inner lower surface of the second U-shaped plate (706) is fixedly connected with a first fixed rod (714), the upper end of the first fixed rod (714) is fixedly connected with a second arc-shaped plate (715), and the first arc-shaped plate (712) and the second arc-shaped plate (715) correspond to each other up and down.

3. A high-precision bending device for steel structure production according to claim 2, characterized in that: A bending assembly (8) is arranged on the upper surface of the workbench (1), and the bending assembly (8) comprises a second fixed plate (801). There are two groups of the second fixed plates (801) and they are symmetrically arranged on the upper end of the workbench (1). A second fixed rod (802) is rotatably connected between the two groups of the second fixed plates (801). There are two groups of the second fixed rods (802) and they are symmetrically arranged between the two groups of the second fixed plates (801). The surfaces of the two groups of the second fixed rods (802) are fixedly connected with first limiting rollers (803). There are four groups of the first limiting rollers (803) and they are symmetrically arranged on the surfaces of the two groups of the second fixed rods (802). The clamping device (7) and the bending assembly (8) correspond to each other on the left and right.

4. A high-precision bending device for steel structure production according to claim 1, characterized in that: A hydraulic cylinder (804) is fixedly connected to the upper surface of the workbench (1); a third U-shaped plate (805) is fixedly connected to the upper end of the hydraulic cylinder (804); a third fixed rod (806) is rotatably connected inside the third U-shaped plate (805); a second limiting roller (807) is fixedly connected to the surface of the third fixed rod (806); there are two groups of the second limiting rollers (807) which are symmetrically arranged on the surface of the third fixed rod (806).

5. A high-precision bending device for steel structure production according to claim 2, characterized in that: The lower end of the connecting plate (3) is fixedly connected to a slider (9), the upper surface of the first fixed plate (4) is provided with a slide groove (10), the slider (9) is slidably connected inside the slide groove (10), a base (11) is arranged below the workbench (1), the upper surface of the base (11) is fixedly connected to a third housing (12), and the lower surface inside the third housing (12) is fixedly connected to a third forward and reverse motor (13).

6. A high-precision bending device for steel structure production according to claim 5, characterized in that: The upper end of the output shaft of the third forward and reverse motor (13) is fixedly connected to a fourth rotating shaft (14), the upper end of the fourth rotating shaft (14) is fixedly connected to a third threaded column (15), the upper end of the third threaded column (15) is threadedly connected to a second threaded tube (16), and the upper end of the second threaded tube (16) is fixedly connected to the lower surface of the workbench (1).

7. A high-precision bending device for steel structure production according to claim 5, characterized in that: The upper surface of the base (11) is fixedly connected to a second telescopic rod (17), the upper end of the second telescopic rod (17) is fixedly connected to the lower surface of the workbench (1), there are two second telescopic rods (17) in total, and they are symmetrically arranged at the lower end of the workbench (1), and the side of the workbench (1) is fixedly connected to a control switch (18).

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