A precise hydraulic automatic straightening machine based on multi-point detection

Abstract

The utility model discloses a kind of precision hydraulic automatic straightening machines based on multipoint detection, it is related to straightening machine technical field, including support frame, dust collection box, the use distance of the fixed frame and the limiting frame of the hydraulic telescopic shaft adjustment of the hydraulic cylinder drive being set, the linear sliding of the limiting slide in moving groove is driven by the lead screw of the driving motor being set, to adjust the position distance between arc straightening ring and fixed arc straightening ring, the positioning rod being set has elasticity and can follow hydraulic telescopic shaft telescopic work, improve nineteen use stability, the arc straightening ring, first fixed arc straightening block, fixed arc straightening ring and second fixed arc straightening block being set can be carried out straightening work to shaft piece, the rotation shaft being set can adjust the use angle of fixed arc straightening ring, convenient to disassemble, the dust generated in straightening work is adsorbed to dust collection box by the dust suction port being set, convenient to clean.

Description

Technical Field

[0001] This utility model relates to the field of straightening machine technology, and in particular to a precision hydraulic automatic straightening machine based on multi-point detection. Background Technology

[0002] In the fields of machinery manufacturing, automotive industry, aerospace, and heavy equipment, shaft parts (such as drive shafts, crankshafts, and lead screws) are core transmission components. During heat treatment, machining, welding, or forging processes, shaft parts are inevitably subjected to thermal stress or external mechanical forces, leading to bending deformation. If this microscopic or macroscopic bending deformation is not eliminated, it will seriously affect the operating accuracy of equipment, generate abnormal noise, accelerate wear, and even cause serious safety accidents. Therefore, the straightening process is an indispensable and crucial step in the production of shaft parts.

[0003] An automatic precision hydraulic straightening machine is disclosed in patent CN101007327A. This patent includes an electrical cabinet, control box, fixtures, servo valves, servo cylinders, piston rods, a controller, an oil filter, a motor, a piston pump, a pressure gauge, an electromagnetic relief valve, a pressure regulating valve, and a cooler. First, the electrical cabinet 8 is powered on, and the straightening machine is put into operation via the control box 9. The workpiece 11 to be straightened is mounted on the fixture 12 on the worktable 3. The dial indicator frame is adjusted, and the calibration point of the workpiece 11 is determined. The runout of the workpiece 11 is measured by rotating the fixture's center pin, and the calibration value is determined. Then, the calibration value is input via the precision potentiometer and handle potentiometer on the control box 9. The proportional servo valve 5 controls the displacement of the piston rod 13 in the servo cylinder 4 according to the command signal. Simultaneously, the feedback signal from the displacement sensor 7 is returned to the controller 10 in the electrical cabinet 8. After comparison and amplification with the input signal, the proportional servo valve 5 precisely controls the displacement of the servo cylinder 4. The hydraulic power source 2 of this invention, which controls the straightening accuracy of the workpiece 11, includes oil filters 14 and 18, an electric motor 15, a piston pump 16, a pressure gauge 17, an electromagnetic overflow valve 19, a pressure regulating valve 21, a cooler 20, and other auxiliary accessories. Its working process is the same as that of the prior art. A hydraulically controlled check valve 22 is provided on the oil line between the servo cylinder 4 and the proportional servo valve 5, which allows the oil in the rodless chamber of the servo cylinder 4 to return directly to the oil tank without passing through the proportional servo valve 5, thus speeding up the return speed of the oil and reducing the heat generation of the system. However, the following problems still exist in this patent: Traditional automatic straightening machines mostly use single-point or dual-point detection methods, which are insufficient to fully reflect the true bending deformation of long shafts or shaft parts with complex deformations. Due to the lack of multi-point comprehensive data support, the control of the downward pressure during the straightening process often relies on empirical values ​​or simple algorithms, easily leading to over-straightening or under-straightening, failing to meet the high-precision (micron-level) straightening requirements of modern precision manufacturing. The support and pressure head structures in existing equipment are usually relatively fixed, lacking flexible adjustment mechanisms. When dealing with shafts of different diameters, lengths, or cross-sectional shapes, operators need to spend a significant amount of time changing molds or manually adjusting the distance between the fixed frame and the limit frame; this not only reduces production efficiency but also increases the difficulty of equipment adjustment. Furthermore… In existing equipment, the angle adjustment and disassembly of core components used for straightening (such as straightening blocks) are often cumbersome and unsuitable for rapid production line switching. During the straightening process, when the hydraulic cylinder drives the telescopic shaft to press down, the lack of effective auxiliary guidance and elastic buffering mechanisms makes the telescopic shaft prone to radial vibration or uneven loading at high speeds or high loads. This instability not only reduces straightening accuracy but may also lead to accelerated wear of hydraulic cylinder seals, shortening the equipment's lifespan. During the straightening process, shaft parts are often accompanied by the shedding of residual cutting fluid, oil, rust, or metal dust. Most existing straightening machines are not equipped with effective dust removal and chip collection devices, causing the dirt generated during straightening to scatter directly inside the equipment or on the workshop floor. This not only pollutes the workshop environment and increases the labor intensity of cleaning workers, but if metal fragments enter the equipment guide rails or hydraulic system, it can easily cause equipment failure.

[0004] To address the above problems, it is necessary to design a precision hydraulic automatic straightening machine based on multi-point detection to overcome these issues. Utility Model Content

[0005] The main purpose of this invention is to provide a precision hydraulic automatic straightening machine based on multi-point detection, which can effectively solve the problems in the background technology.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A precision hydraulic automatic straightening machine based on multi-point detection includes a support frame and a dust collection box. A hydraulic cylinder is installed on the top of the dust collection box. The output end of the hydraulic cylinder is connected to a hydraulic telescopic shaft. A positioning block is installed on the top of the hydraulic telescopic shaft. A fixing frame is installed on the top of the positioning block. A moving groove is opened on the inner side of the fixing frame. A drive motor is installed at one end of the fixing frame. The output end of the drive motor is connected to a lead screw through a coupling. A limit slider is provided on the outer wall of the lead screw. A moving block is installed at the bottom of the limit slider. A positioning rod is installed at the bottom of the moving block. An installation block is installed at the bottom of the positioning rod. An arc-shaped straightening ring is installed on the inner side of the installation block. A connecting rod is installed at the bottom of the installation block. A first fixing block is installed at the bottom of the connecting rod. A first fixing arc-shaped straightening block is installed on one side of the first fixing block.

[0007] As a preferred embodiment of this utility model, a retractable connecting shaft is connected to the bottom end of the fixed frame near the drive motor. A connecting plate is installed at the bottom of the retractable connecting shaft. A fixed arc-shaped straightening ring is installed on the inner side of the connecting plate. A rotating shaft is connected to the bottom end of the connecting plate. A limiting plate is connected to the outer wall of the rotating shaft. A second fixing block is connected to the bottom of the rotating shaft. A support base is installed on one side of the second fixing block. A second fixed arc-shaped straightening block is installed on the side of the second fixing block away from the support base. A limiting frame is installed on the top of the support frame. Multiple dust suction ports are opened on the inner side of the limiting frame.

[0008] In a preferred embodiment of this utility model, the hydraulic cylinder is rotatably connected to the hydraulic telescopic shaft, the hydraulic telescopic shaft is rotatably connected to the positioning block, and the positioning block is fixedly connected to the fixing frame.

[0009] In a preferred embodiment of this utility model, the drive motor is connected to the lead screw via a coupling, the lead screw is threadedly fixedly connected to the limiting slider, and the limiting slider is fixedly connected to the moving block.

[0010] In a preferred embodiment of this utility model, the movable block is rotatably connected to the positioning rod, the positioning rod is elastically retractable, the positioning rod is rotatably connected to the mounting block, and the mounting block is fixedly connected to the arc-shaped straightening ring.

[0011] In a preferred embodiment of this utility model, the mounting block is rotatably connected to the connecting rod, the connecting rod is rotatably connected to the first fixing block, and the first fixing block is threadedly fixedly connected to the first fixing arc straightening block.

[0012] As a preferred embodiment of this utility model, the retractable connecting shaft is rotatably connected to the connecting plate, the connecting plate is fixedly connected to the fixed arc-shaped straightening ring, the connecting plate is rotatably connected to the rotating shaft, and the rotating shaft is rotatably connected to the limiting disk.

[0013] As a preferred embodiment of this utility model, the rotating shaft passes through the bottom of the limiting disk and is rotatably connected to the top of the second fixing block, the second fixing block is fixedly connected to the support base, and the second fixing block is threadedly fixedly connected to the second fixing arc straightening block.

[0014] Beneficial effects Compared with the prior art, the present invention has the following beneficial effects: This precision hydraulic automatic straightening machine based on multi-point detection uses a hydraulic cylinder to drive a hydraulic telescopic shaft to adjust the working distance between the fixed frame and the limit frame. A drive motor drives a lead screw to move a limit slider linearly within the moving groove, thereby adjusting the positional distance between the arc-shaped straightening ring and the fixed arc-shaped straightening ring. The positioning rod is elastic and can follow the extension and retraction of the hydraulic telescopic shaft, improving the stability of use. The arc-shaped straightening ring, the first fixed arc-shaped straightening block, the fixed arc-shaped straightening ring, and the second fixed arc-shaped straightening block can all straighten the shaft. The rotating shaft can adjust the working angle of the fixed arc-shaped straightening ring for easy disassembly. The dust suction port absorbs the dust generated during the straightening process into the dust collection box for easy cleaning. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the lead screw installation structure of this utility model; Figure 3 This is a schematic diagram of the retractable connecting shaft installation structure of this utility model; Figure 4 This is a schematic diagram of the installation structure of the first fixed arc-shaped straightening block of this utility model; Figure 5 This is a schematic diagram of the rotating shaft mounting structure of this utility model.

[0016] In the diagram: 1. Support frame; 2. Dust collection box; 3. Hydraulic cylinder; 4. Hydraulic telescopic shaft; 5. Positioning block; 6. Fixed frame; 7. Moving slot; 8. Drive motor; 9. Lead screw; 10. Limiting slider; 11. Moving block; 12. Telescopic connecting shaft; 13. Connecting plate; 14. Positioning rod; 15. Mounting block; 16. Arc-shaped straightening ring; 17. Connecting rod; 18. First fixed block; 19. First fixed arc-shaped straightening block; 20. Fixed arc-shaped straightening ring; 21. Rotating shaft; 22. Limiting plate; 23. Support base; 24. Second fixed block; 25. Second fixed arc-shaped straightening block; 26. Limiting frame; 27. Dust suction port. Detailed Implementation

[0017] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0018] like Figures 1-5 As shown, a precision hydraulic automatic straightening machine based on multi-point detection includes a support frame 1 and a dust collection box 2. A hydraulic cylinder 3 is installed on the top of the dust collection box 2. A hydraulic telescopic shaft 4 is connected to the output end of the hydraulic cylinder 3. A positioning block 5 is installed on the top of the hydraulic telescopic shaft 4. A fixing frame 6 is installed on the top of the positioning block 5. A moving groove 7 is opened on the inner side of the fixing frame 6. A drive motor 8 is installed at one end of the fixing frame 6. A lead screw 9 is connected to the output end of the drive motor 8 through a coupling. A limit slider 10 is provided on the outer wall of the lead screw 9. A moving block 11 is installed at the bottom of the limit slider 10. A positioning rod 14 is installed at the bottom of the moving block 11. An installation block 15 is installed at the bottom of the positioning rod 14. An arc-shaped straightening ring 16 is installed on the inner side of the installation block 15. A connecting rod 17 is installed at the bottom of the installation block 15. A first fixing block 18 is installed at the bottom of the connecting rod 17. A first fixing arc-shaped straightening block 19 is installed on one side of the first fixing block 18. Hydraulic cylinder 3 is rotatably connected to hydraulic telescopic shaft 4, hydraulic telescopic shaft 4 is rotatably connected to positioning block 5, positioning block 5 is fixedly connected to fixed frame 6; drive motor 8 is connected to lead screw 9 through coupling, lead screw 9 is threadedly fixedly connected to limit slider 10, limit slider 10 is fixedly connected to moving block 11; moving block 11 is rotatably connected to positioning rod 14, positioning rod 14 is elastic and retractable, positioning rod 14 is rotatably connected to mounting block 15, mounting block 15 is fixedly connected to arc straightening ring 16; Specifically, in this embodiment, a hydraulic cylinder 3 is installed at the center of the top of the dust collection box 2. The output end of the hydraulic cylinder 3 is connected to a hydraulic telescopic shaft 4, which extends upward and through to the top. Its top end is fixedly connected to a fixed frame 6 via a positioning block 5. The fixed frame 6 serves as the main moving crossbeam, and its inner side is provided with a long strip-shaped moving groove 7. A drive motor 8 is installed at one end of the fixed frame 6. The output shaft of the drive motor 8 is connected to a lead screw 9 via a coupling. The lead screw 9 is mounted in the moving groove 7 and is threadedly engaged with a limiting slider 10. The limiting slider 10 is restricted within the moving groove 7 and can only move in a straight line along the groove. The sliding block 10 is fixedly connected to the bottom of the limiting slider 10. The lower end of the sliding block 11 is connected to the positioning rod 14. The positioning rod 14 adopts an elastic telescopic rod structure. Its lower end is connected to the mounting block 15. The arc-shaped straightening ring 16 is fixedly installed on the inner side of the mounting block 15 for direct contact and pressure on the shaft. At the same time, the bottom of the mounting block 15 is rotatably connected to the first fixed block 18 through the connecting rod 17. The first fixed arc-shaped straightening block 19 is threaded on the first fixed block 18. The telescopic connecting shaft 12 is connected to the bottom of the fixed frame 6 near the drive motor 8. The bottom of the telescopic connecting shaft 12 is equipped with a connecting plate 13. Place the shaft to be straightened on the limiting frame 26, activate the hydraulic cylinder 3 to drive the hydraulic telescopic shaft 4 to extend and retract, adjust the overall height of the fixing frame 6 so that the arc-shaped straightening ring 16 and the fixed arc-shaped straightening ring 20 are initially located on both sides of the bent part of the shaft, ensuring that the workpiece is in the machinable area. Based on the shaft bending data fed back by the multi-point detection system, start the drive motor 8. The motor 8 drives the lead screw 9 to rotate, driving the limiting slider 10 to slide in the moving groove 7. Through the precision transmission of the lead screw, fine-tune the position of the moving block 11 and the bottom arc-shaped straightening ring 16 so that they are aligned with the fixed arc-shaped straightening ring 20. The distance between the rings 20 is precisely adapted to the diameter of the shaft and the required amount of pressure. The hydraulic system is activated to pressurize, and the hydraulic telescopic shaft 4 pushes the fixed frame 6 down. At this time, the arc-shaped straightening ring 16 contacts the shaft and applies a straightening force. During the pressing process, the positioning rod 14 connecting the moving block 11 and the mounting block 15 starts to work. When the hydraulic pressure fluctuates or the shaft generates a reaction force, the positioning rod 14 uses its own elastic properties to perform a small extension and buffer, always maintaining the verticality of the mounting block 15, avoiding tilting or hard impact of the straightening head, thereby ensuring the stability and accuracy of the straightening.

[0019] A telescopic connecting shaft 12 is connected to the bottom end of the fixed frame 6 near the drive motor 8. A connecting plate 13 is installed at the bottom of the telescopic connecting shaft 12. A fixed arc-shaped straightening ring 20 is installed on the inner side of the connecting plate 13. A rotating shaft 21 is connected to the bottom end of the connecting plate 13. A limiting plate 22 is connected to the outer wall of the rotating shaft 21. A second fixing block 24 is connected to the bottom of the rotating shaft 21. A support seat 23 is installed on one side of the second fixing block 24. A second fixed arc-shaped straightening block 25 is installed on the side of the second fixing block 24 away from the support seat 23. A limiting frame 26 is installed on the top of the support frame 1. Multiple dust suction ports 27 are opened on the inner side of the limiting frame 26. Mounting block 15 is rotatably connected to connecting rod 17, connecting rod 17 is rotatably connected to first fixing block 18, first fixing block 18 is threadedly fixed to first fixed arc straightening block 19; telescopic connecting shaft 12 is rotatably connected to connecting plate 13, connecting plate 13 has a fixed arc straightening ring 20 fixedly connected, connecting plate 13 is rotatably connected to rotating shaft 21, rotating shaft 21 is rotatably connected to limiting disk 22; rotating shaft 21 passes through the bottom of limiting disk 22 and is rotatably connected to the top of second fixing block 24, second fixing block 24 is fixedly connected to support base 23, second fixing block 24 is threadedly fixed to second fixed arc straightening block 25; Specifically, in this embodiment, a fixed arc-shaped straightening ring 20 is fixed on the inner side of the connecting plate 13, the bottom of the connecting plate 13 is connected to the second fixed block 24 through the rotating shaft 21, and a limiting plate 22 is set at the rotating shaft 21 for locking. A support base 23 and a second fixed arc-shaped straightening block 25 are installed on the second fixed block 24, and a limiting frame 26 is installed on the top of the support frame 1 for placing the shaft to be straightened. Multiple dust suction ports 27 are opened on the inner side of the limiting frame 26 corresponding to the processing area. If a shaft with a special shape is encountered or the worn fixed arc straightening ring 20 needs to be replaced, the operator can loosen the limit plate 22, turn the rotating shaft 21, and adjust the angle of the connecting plate 13 and the fixed arc straightening ring 20. After adjustment, the ring is locked again. At the same time, the dust suction port 27 is continuously opened during the entire straightening process and the loading and unloading of the workpiece, so as to suck the metal dust generated during straightening into the dust collection box 2 and complete the automatic cleaning.

[0020] It should be noted that this utility model is a precision hydraulic automatic straightening machine based on multi-point detection. In use, the hydraulic cylinder 3 drives the hydraulic telescopic shaft 4 to extend and retract, causing the fixed frame 6 to rise or fall as a whole. This process is used to quickly adjust the macroscopic distance between the fixed frame 6 and the bottom limiting frame 26 to accommodate shaft workpieces of different heights or lengths, providing initial space for clamping. For specific straightening points, the drive motor 8 is used as the power source to drive the lead screw 9 to rotate. Since the limiting slider 10 is threadedly connected to the lead screw 9 and is limited by the moving groove 7, the rotation of the lead screw becomes the linear sliding of the limiting slider 10 inside the moving groove 7. The limiting slider 10 drives the moving block 11, positioning rod 14 and mounting block 15 below to move synchronously, thereby accurately adjusting the relative position distance between the arc-shaped straightening ring 16 on the movable side and the fixed arc-shaped straightening ring 20 on the opposite side. This dual adjustment mechanism ensures precise control of the straightening lever arm and the amount of pressure. During the straightening process where the hydraulic telescopic shaft 4 drives the fixed frame 6 to press down, the positioning rod 14 installed between the moving block 11 and the mounting block 15 plays a crucial role. The positioning rod 14 is designed with an elastic and retractable structure, such as a guide rod with an internal spring. When the equipment is subjected to straightening reaction force or instantaneous impact from hydraulic drive, the positioning rod 14 can generate a small amount of elastic deformation to buffer and absorb energy, while always maintaining vertical guiding constraint on the mounting block 15. This design effectively prevents the arc-shaped straightening ring 16 from radially swaying under force, greatly improving the stability and straightening accuracy of the hydraulic operation. The equipment forms multiple contact points through the arc-shaped straightening ring 16, the first fixed arc-shaped straightening block 19, the fixed arc-shaped straightening ring 20, and the second fixed arc-shaped straightening block 25. Combined with the external multi-point detection system, this achieves precise positioning of the bent parts of the shaft. In particular, through the design of the rotating shaft 21, the operator can adjust the operating angle of the fixed arc-shaped straightening ring 20. When it is necessary to change molds of different specifications or perform maintenance, the angle can be quickly adjusted by rotating the shaft 21 after loosening the limiting plate 22, achieving quick disassembly and installation, improving the versatility and maintenance efficiency of the equipment. During the straightening operation, rust, oxide scale or metal dust attached to the surface of the shaft will be shaken off. The equipment has multiple dust suction ports 27 on the inner side of the limiting frame 26. These dust suction ports are connected to the dust collection box 2 through pipelines. Under negative pressure, the dust generated in the straightening area is immediately sucked into the dust collection box 2 for centralized treatment, preventing debris from contaminating the equipment guide rails or scratching the workpiece surface, and ensuring a clean working environment. Compared to the closed-loop feedback of hydraulic control systems used in comparative documents and common existing technologies, the adjustment of their mechanical parts is relatively fixed. When dealing with shaft parts of different diameters, lengths, or complex bending shapes, it is often necessary to change specific fixtures or rely on the operator's experience to manually adjust the dial indicator holder. The adjustment process is cumbersome and it is difficult to accurately control the relative distance between the straightening point and the support point, resulting in poor versatility. This invention features a screw-driven adjustment mechanism consisting of a drive motor 8, a lead screw 9, and a limiting slider 10. This mechanism can precisely drive the positional distance between the arc-shaped straightening ring 16 and the fixed arc-shaped straightening ring 20. By starting the drive motor 8, the lead screw 9 rotates, causing the limiting slider 10 to slide linearly with high precision within the moving groove 7, thereby moving the straightening assembly below. This structure allows operators to quickly adapt to shaft parts of different specifications without changing molds, significantly improving the adjustment accuracy and versatility of the equipment and solving the problem of insufficient mechanical adjustment flexibility in existing technologies. In existing technologies, servo cylinders directly drive piston rods to apply pressure. Although they have displacement feedback, the reaction force of the workpiece during straightening can easily cause the piston rod to produce slight radial vibration or off-center loading. This mechanical vibration affects the final straightening accuracy, and long-term vibration will shorten the service life of the cylinder seals. This invention provides a positioning rod 14 with elastic and retractable function connected between the moving block 11 and the mounting block 15. This provides elastic buffering and maintains vertical guiding stability when the hydraulic telescopic shaft 4 applies pressure. During the straightening process, the positioning rod 14 can follow the hydraulic telescopic shaft 4 to extend and retract. When the straightening pressure is applied, the positioning rod 14 uses its own elastic properties to absorb the impact force, preventing the arc-shaped straightening ring 16 from undergoing hard displacement, effectively eliminating radial vibration, and thus significantly improving the stability of the straightening operation and the accuracy of the finished product. Existing fixture structures are typically fixed installations. When adjusting the contact surface of specific irregularly shaped shafts or disassembling and maintaining worn molds, the limited operating space and difficulty in angle adjustment lead to prolonged equipment maintenance time and reduced production efficiency. This invention addresses this by using a rotating shaft 21 and a limiting plate 22 to connect and fix an arc-shaped straightening ring 20, allowing for free adjustment of the ring's angle and convenient disassembly. The rotating shaft 21 allows operators to flexibly adjust the contact angle of the ring according to the workpiece shape or straightening process requirements. Simultaneously, releasing the limiting plate 22 enables quick disassembly and replacement of components. This structure significantly optimizes the human-machine interface and improves equipment maintenance convenience. Existing technologies primarily focus on optimizing electrical control and hydraulic circuits, neglecting the physical contamination generated during straightening. When shafts are subjected to straightening force, rust, scale, or metal dust can fall and scatter onto the worktable and guide rails. If not cleaned promptly, this can easily scratch the workpiece surface or enter the equipment guide rails, causing wear.This utility model features multiple suction ports 27 on the inner side of the limiting frame 26, connected to the dust collection box 2. This allows for real-time adsorption and centralized collection of dust generated during the straightening process. This structural design utilizes the principle of negative pressure suction, directly cleaning at the source of waste materials, effectively maintaining the cleanliness of the equipment's interior, preventing secondary damage to precision moving parts from metal debris, extending the equipment's lifespan, and improving the workshop's working environment.

[0021] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A precision hydraulic automatic straightening machine based on multi-point detection, comprising a support frame (1) and a dust collection box (2), characterized in that: A hydraulic cylinder (3) is installed on the top of the dust collection box (2). The output end of the hydraulic cylinder (3) is connected to a hydraulic telescopic shaft (4). A positioning block (5) is installed on the top of the hydraulic telescopic shaft (4). A fixing frame (6) is installed on the top of the positioning block (5). A moving groove (7) is provided on the inner side of the fixing frame (6). A drive motor (8) is installed on one end of the fixing frame (6). The output end of the drive motor (8) is connected to a lead screw (9) through a coupling. A limit slider is provided on the outer wall of the lead screw (9). (10) A movable block (11) is installed at the bottom of the limiting slider (10), a positioning rod (14) is installed at the bottom of the movable block (11), an installation block (15) is installed at the bottom of the positioning rod (14), an arc-shaped straightening ring (16) is installed on the inner side of the installation block (15), a connecting rod (17) is installed at the bottom of the installation block (15), a first fixing block (18) is installed at the bottom of the connecting rod (17), and a first fixing arc-shaped straightening block (19) is installed on one side of the first fixing block (18).

2. The precision hydraulic automatic straightening machine based on multi-point detection according to claim 1, characterized in that: The bottom of the fixed frame (6) is connected to a retractable connecting shaft (12) near the drive motor (8). A connecting plate (13) is installed at the bottom of the retractable connecting shaft (12). A fixed arc-shaped straightening ring (20) is installed on the inner side of the connecting plate (13). A rotating shaft (21) is connected to the bottom of the connecting plate (13). A limiting plate (22) is connected to the outer wall of the rotating shaft (21). A second fixed block (24) is connected to the bottom of the rotating shaft (21). A support seat (23) is installed on one side of the second fixed block (24). A second fixed arc-shaped straightening block (25) is installed on the side of the second fixed block (24) away from the support seat (23). A limiting frame (26) is installed on the top of the support frame (1). Multiple dust suction ports (27) are opened on the inner side of the limiting frame (26).

3. A precision hydraulic automatic straightening machine based on multi-point detection according to claim 1, characterized in that: The hydraulic cylinder (3) is rotatably connected to the hydraulic telescopic shaft (4), the hydraulic telescopic shaft (4) is rotatably connected to the positioning block (5), and the positioning block (5) is fixedly connected to the fixing frame (6).

4. A precision hydraulic automatic straightening machine based on multi-point detection according to claim 1, characterized in that: The drive motor (8) is connected to the lead screw (9) via a coupling. The lead screw (9) is threadedly fixed to the limiting slider (10). The limiting slider (10) is fixedly connected to the moving block (11).

5. A precision hydraulic automatic straightening machine based on multi-point detection according to claim 1, characterized in that: The movable block (11) is rotatably connected to the positioning rod (14), the positioning rod (14) is elastic and retractable, the positioning rod (14) is rotatably connected to the mounting block (15), and the mounting block (15) is fixedly connected to the arc-shaped straightening ring (16).

6. A precision hydraulic automatic straightening machine based on multi-point detection according to claim 1, characterized in that: The mounting block (15) is rotatably connected to the connecting rod (17), the connecting rod (17) is rotatably connected to the first fixing block (18), and the first fixing block (18) is threadedly fixed to the first fixing arc straightening block (19).

7. A precision hydraulic automatic straightening machine based on multi-point detection according to claim 2, characterized in that: The retractable connecting shaft (12) is rotatably connected to the connecting plate (13), the connecting plate (13) is fixedly connected to the fixed arc straightening ring (20), the connecting plate (13) is rotatably connected to the rotating shaft (21), and the rotating shaft (21) is rotatably connected to the limiting disk (22).

8. A precision hydraulic automatic straightening machine based on multi-point detection according to claim 2, characterized in that: The rotating shaft (21) passes through the bottom of the limiting plate (22) and is rotatably connected to the top of the second fixing block (24). The second fixing block (24) is fixedly connected to the support base (23). The second fixing block (24) is threadedly fixedly connected to the second fixing arc straightening block (25).

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