A rotary roll straightening device for elongate shafts

Abstract

The utility model discloses a kind of rotary rolling straightening devices for slender shaft, it is related to slender shaft straightening technical field, including support plate, vertical plate, rotary motor, rotary motor drives coupling to drive rotary shaft rotation, to drive long shaft rotation, sliding block slides in moving groove, realize to drive L-shaped support frame movement, miniature damper can play buffering shock-absorbing effect when first arc-shaped down pressure ring, second arc-shaped down pressure ring, down pressure plate contact with long shaft outer wall, telescopic rod, spring simultaneously have buffering limiting effect, hydraulic cylinder drives hydraulic telescopic shaft can drive first lower arc straightening ring linearly move work at long shaft bottom seat, first lower arc straightening ring is straightened to long shaft outer wall, second lower arc straightening ring is connected with first limiting disc using positioning plate, simultaneously arranged second limiting disc connects second lower arc straightening ring with one end of L-shaped support frame, realize first lower arc straightening ring movement can drive first arc-shaped down pressure ring movement.

Description

Technical Field

[0001] This utility model relates to the field of slender shaft straightening technology, and in particular to a rotary rolling straightening device for slender shafts. Background Technology

[0002] In the fields of mechanical manufacturing, precision machining, and post-processing of shaft parts, slender shafts (shaft parts with a large length-to-diameter ratio) are prone to bending deformation during machining, heat treatment, or storage due to their structural characteristics. Straightness is one of the key indicators for measuring the machining quality of shaft parts. For slender shafts, if the bending deformation exceeds the tolerance, it will directly affect their coaxiality, rotational balance, and service life in mechanical assembly, and may even lead to severe vibration and noise during equipment operation.

[0003] A patent with publication number CN220387525U discloses a straightening device for machining slender shafts. This patent includes a frame, an inner support assembly for the long shaft, a guide rod, a bracket, a side frame, a top-end limiting assembly for the long shaft, a micro-control motor, a connecting belt, a drive roller, a lower mounting frame, an upper mounting frame, a fixed rod, a rotating roller, a linear motor, a connecting assembly, a connecting frame, a limiting rod, a movable plate, a stamping assembly, a mounting frame, and a stamping head. By adjusting the side frame, the position of the top-end limiting assembly for the long shaft can be adjusted. The long shaft can then be placed on top of the top-end limiting assembly, and the two ends of the long shaft are fixed by the top-end limiting assembly. The stamping assembly can then be straightened using a cylinder. This device can fix and connect long shafts of different lengths, facilitating the operator's use of the shaft. However, this patent also has the following problems: Traditional static pressure straightening typically uses a rigid indenter in direct contact with the workpiece surface, which can easily leave indentations on slender shafts, damaging surface finish. Furthermore, excessive localized force can lead to residual stress concentration, which, during subsequent use or machining, can cause the workpiece to deform again, exhibiting a "springback" phenomenon, making it difficult to maintain straightening accuracy long-term. For slender shafts, their poor rigidity makes multi-point support difficult; existing straightening devices often lack effective rotational coordination, only correcting a single cross-section, making it difficult to guarantee the coaxiality of the entire shaft. In addition, the lack of a buffering mechanism during force application allows rigid impacts to easily damage the internal metallographic structure of the shaft; the bending of slender shafts is often complex, non-planar spatial bending. Many existing devices are cumbersome and lack flexibility when adjusting the relative positions of the support and pressure points. Moreover, during roll forming straightening, if precise coordination of rotation and radial feed cannot be achieved, it is difficult to eliminate roundness errors.

[0004] To address the above problems, a rotary rolling straightening device for slender shafts needs to be designed to overcome them. Utility Model Content

[0005] The main objective of this invention is to provide a rotary rolling straightening device for slender shafts, which can effectively solve the problems in the background art.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A rotary rolling straightening device for slender shafts includes a support plate, a vertical plate, and a rotary motor. The output end of the rotary motor is connected to a coupling, and the output end of the coupling is connected to a rotating shaft. A guide block is installed on the outer wall of the rotating shaft, and a long shaft is connected to the output end of the rotating shaft. Moving grooves are formed at both ends of the support plate, and sliders are connected to the inner surfaces of the moving grooves. An L-shaped support frame is installed at the end of the slider away from the support plate. A connecting shaft is connected to the inner surface of the L-shaped support frame, and a support arm is connected to the end of the connecting shaft away from the L-shaped support frame. A reinforcing rod is installed on the inner surface of the support arm, and a miniature damper is provided at the bottom of the reinforcing rod. A lower pressure plate is installed at the bottom of the miniature damper. A first arc-shaped lower pressure ring and a second arc-shaped lower pressure ring are respectively connected to both ends of the lower pressure plate. A telescopic rod is connected to the top of both the first and second arc-shaped lower pressure rings away from the miniature damper, and a spring is installed on the outer wall of the telescopic rod.

[0007] As a preferred embodiment of this utility model, a hydraulic cylinder is installed at one end of the top of the support plate, the output end of the hydraulic cylinder is connected to a hydraulic telescopic shaft, an mounting plate is installed at one end of the hydraulic telescopic shaft, a first lower arc-shaped straightening ring is fixedly installed on the inner side of the mounting plate, a second lower arc-shaped straightening ring is installed at the end of the first lower arc-shaped straightening ring away from the mounting plate, a first limiting plate is installed at one end of the second lower arc-shaped straightening ring, a positioning plate is installed between two adjacent first limiting plates, and a second limiting plate is connected to one end of the first limiting plate.

[0008] In a preferred embodiment of this utility model, the rotary motor is connected to the rotary shaft via the coupling, the rotary shaft is rotatably connected to the long shaft, and the slider is slidably connected to the inner side of the moving groove.

[0009] As a preferred embodiment of this utility model, the slider is fixedly connected to the L-shaped support frame, the L-shaped support frame is rotatably connected to the connecting shaft, the connecting shaft is rotatably connected to the support arm, and two adjacent support arms are rotatably connected to the reinforcing rod.

[0010] As a preferred embodiment of this utility model, the reinforcing rod is fixedly connected to the micro damper, the micro damper is fixedly connected to the lower pressure plate, and the lower pressure plate is fixedly connected to the first arc-shaped lower pressure ring and the second arc-shaped lower pressure ring respectively.

[0011] As a preferred embodiment of this utility model, the first arc-shaped pressure ring and the second arc-shaped pressure ring are both rotatably connected to the telescopic rod, the telescopic rod is fixedly connected to the spring, and the top of the telescopic rod is rotatably connected to the bottom of the connecting shaft.

[0012] As 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 mounting plate, and two first lower arc-shaped straightening rings are fixedly installed at one end of the mounting plate; As a preferred embodiment of this utility model, the first lower arc-shaped straightening ring is fixedly connected to the second lower arc-shaped straightening ring, the second lower arc-shaped straightening ring is threadedly fixedly connected to the first limiting plate, the first limiting plate is rotatably connected to the second limiting plate, and the end of the second limiting plate away from the first limiting plate is rotatably connected to one end of the L-shaped support frame.

[0013] Beneficial effects Compared with the prior art, the present invention has the following beneficial effects: This rotary rolling straightening device for slender shafts uses a rotary motor to drive a coupling, which in turn rotates the shaft. A slider slides within a moving groove, moving an L-shaped support frame. This allows adjustment of the positional distance between the first and second arc-shaped lower pressure rings and the first lower arc-shaped straightening ring. A connecting shaft connects the L-shaped support frame to a support arm, which improves the stability of the first and second arc-shaped lower pressure rings. A miniature damper is also included to adjust the position of the first and second arc-shaped lower pressure rings. The lower pressure plate acts as a buffer and shock absorber when it contacts the outer wall of the long shaft. The telescopic rod and spring also have a buffer and limiting effect. The hydraulic cylinder drives the hydraulic telescopic shaft to move the first lower arc straightening ring linearly at the bottom of the long shaft. The first lower arc straightening ring straightens the outer wall of the long shaft. The second lower arc straightening ring is connected to the first limiting plate through the positioning plate. At the same time, the second limiting plate connects the second lower arc straightening ring to one end of the L-shaped support frame, so that the movement of the first lower arc straightening ring can drive the movement of the first arc lower pressure ring. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of structure A of this utility model; Figure 3 This is a schematic diagram of the installation structure of the first arc-shaped pressure ring and the second arc-shaped pressure ring of this utility model; Figure 4 This is a schematic diagram of the installation structure of the first lower arc-shaped straightening ring of this utility model.

[0015] In the diagram: 1. Support plate; 2. Vertical plate; 3. Rotary motor; 4. Guide block; 5. Coupling; 6. Rotating shaft; 7. Long shaft; 8. Moving groove; 9. Slider; 10. L-shaped support frame; 11. Connecting shaft; 12. Support arm; 13. Reinforcing rod; 14. Miniature damper; 15. Lower pressure plate; 16. First arc-shaped lower pressure ring; 17. Second arc-shaped lower pressure ring; 18. Telescopic rod; 19. Spring; 20. Hydraulic cylinder; 21. Hydraulic telescopic shaft; 22. Mounting plate; 23. First lower arc-shaped straightening ring; 24. Second lower arc-shaped straightening ring; 25. Positioning plate; 26. First limiting plate; 27. Second limiting plate; 28. Telescopic connecting rod. Detailed Implementation

[0016] 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.

[0017] like Figures 1-4 As shown, a rotary rolling straightening device for slender shafts includes a support plate 1, a vertical plate 2, and a rotary motor 3. The output end of the rotary motor 3 is connected to a coupling 5, and the output end of the coupling 5 is connected to a rotary shaft 6. A guide block 4 is installed on the outer wall of the rotary shaft 6, and the output end of the rotary shaft 6 is connected to a long shaft 7. Moving grooves 8 are formed at both ends of the support plate 1, and sliders 9 are connected to the inner surfaces of the moving grooves 8. An L-shaped support frame 10 is installed at the end of the slider 9 away from the support plate 1, and a connecting shaft 11 is connected to the inner surface of the L-shaped support frame 10. A support arm 12 is connected to the end of the shaft 11 away from the L-shaped support frame 10. A reinforcing rod 13 is installed on the inner side of the support arm 12. A micro damper 14 is provided at the bottom of the reinforcing rod 13. A lower pressure plate 15 is installed at the bottom of the micro damper 14. A first arc-shaped lower pressure ring 16 and a second arc-shaped lower pressure ring 17 are respectively connected to the two ends of the lower pressure plate 15. A telescopic rod 18 is connected to the top of the first arc-shaped lower pressure ring 16 and the second arc-shaped lower pressure ring 17 away from the micro damper 14. A spring 19 is installed on the outer wall of the telescopic rod 18. The rotary motor 3 is connected to the rotating shaft 6 via the coupling 5. The rotating shaft 6 is rotatably connected to the long shaft 7. The slider 9 is slidably connected to the inner side of the moving groove 8. The slider 9 is fixedly connected to the L-shaped support frame 10. The L-shaped support frame 10 is rotatably connected to the connecting shaft 11. The connecting shaft 11 is rotatably connected to the support arm 12. Two adjacent support arms 12 are rotatably connected to the reinforcing rod 13. The reinforcing rod 13 is fixedly connected to the micro damper 14. The micro damper 14 is fixedly connected to the lower pressure plate 15. The lower pressure plate 15 is fixedly connected to the first arc-shaped lower pressure ring 16 and the second arc-shaped lower pressure ring 17 respectively. The first arc-shaped lower pressure ring 16 and the second arc-shaped lower pressure ring 17 are both rotatably connected to the telescopic rod 18. The telescopic rod 18 is fixedly connected to the spring 19. The top of the telescopic rod 18 is rotatably connected to the bottom of the connecting shaft 11. Specifically, in this embodiment, the support plate 1 is placed horizontally, and the upright plate 2 is fixed to one side of the support plate 1. A rotary motor 3 is installed on the upright plate 2. The output end of the rotary motor 3 is connected to the rotary shaft 6 through a coupling 5. A guide block 4 is provided on the outer wall of the rotary shaft 6 to ensure smooth rotation. The end of the rotary shaft 6 is used to install the long shaft 7 to be processed. Movable grooves 8 are opened at both ends of the support plate 1. The slider 9 is embedded in the movable groove 8 so that it can slide along the groove. An L-shaped support frame 10 is fixedly installed on the top of the slider 9. A support arm 12 is hinged to one end of the inner side of the L-shaped support frame 10 through a connecting shaft 11. To enhance structural rigidity, a reinforcing rod 13 is installed between adjacent support arms 12; a miniature damper 14 is fixed at the bottom of the reinforcing rod 13, and the output end of the miniature damper 14 is connected to a lower pressure plate 15; a first arc-shaped lower pressure ring 16 and a second arc-shaped lower pressure ring 17 are fixed at both ends of the lower pressure plate 15; at the same time, a telescopic rod 18 is set between the top of the first arc-shaped lower pressure ring 16 and the second arc-shaped lower pressure ring 17 and the bottom of the connecting shaft 11, and a spring 19 is fitted on the outside of the telescopic rod 18 to form an elastic suspension structure.

[0018] A hydraulic cylinder 20 is installed at one end of the top of the support plate 1. The output end of the hydraulic cylinder 20 is connected to a hydraulic telescopic shaft 21. An installation plate 22 is installed at one end of the hydraulic telescopic shaft 21. A first lower arc-shaped straightening ring 23 is fixedly installed on the inner side of the installation plate 22. A second lower arc-shaped straightening ring 24 is installed at the end of the first lower arc-shaped straightening ring 23 away from the installation plate 22. A first limiting plate 26 is installed at one end of the second lower arc-shaped straightening ring 24. A positioning plate 25 is installed between two adjacent first limiting plates 26. A second limiting plate 27 is connected to one end of the first limiting plate 26. The hydraulic cylinder 20 is rotatably connected to the hydraulic telescopic shaft 21, and the hydraulic telescopic shaft 21 is rotatably connected to the mounting plate 22. Two first lower arc-shaped straightening rings 23 are fixedly installed at one end of the mounting plate 22. The first lower arc-shaped straightening ring 23 is fixedly connected to the second lower arc-shaped straightening ring 24. The second lower arc-shaped straightening ring 24 is threadedly fixedly connected to the first limiting plate 26. The first limiting plate 26 is rotatably connected to the second limiting plate 27. The end of the second limiting plate 27 away from the first limiting plate 26 is rotatably connected to one end of the L-shaped support frame 10. Specifically, in this embodiment, a hydraulic cylinder 20 is installed at one end of the top of the support plate 1, and the output end of the hydraulic cylinder 20 is connected to a hydraulic telescopic shaft 21. A mounting plate 22 is installed at the top of the hydraulic telescopic shaft 21, and a first lower arc-shaped straightening ring 23 is fixedly installed on the inner side of the mounting plate 22; a second lower arc-shaped straightening ring 24 is installed on one side of the first lower arc-shaped straightening ring 23, and is fixedly connected to it by a positioning plate 25 and a first limiting plate 26. The first limiting plate 26 and the second limiting plate 27 rotate in cooperation, and the other end of the second limiting plate 27 is rotatably connected to one end of the L-shaped support frame 10. One end of the slender shaft 7 to be straightened is clamped and fixed to the output end of the rotating shaft 6 to ensure that it is placed horizontally. According to the diameter and bending condition of the shaft 7, the slider 9 is pushed to slide in the moving groove 8, which drives the L-shaped support frame 10 to move as a whole. At this time, the connecting shaft 11 drives the support arm 12 and the first arc-shaped lower pressure ring 16 and the second arc-shaped lower pressure ring 17 below to move, so that they are in a suitable position directly above the shaft 7. The rotating motor 3 is turned on, and the motor drives the rotating shaft 6 to rotate through the coupling 5, which in turn drives the shaft 7 to rotate at a constant speed. The hydraulic cylinder 20 is started, which drives the hydraulic telescopic shaft 21 to extend upward. The hydraulic telescopic shaft 21 pushes the mounting plate 22 and the first lower arc-shaped straightening ring 23 to move upward in a straight line until the first lower arc-shaped straightening ring 23 is in close contact with the bottom of the shaft 7 and applies an upward top pressure. As the hydraulic cylinder 20 continues to rise, the first lower arc-shaped straightening ring 23, through the transmission mechanism of the second lower arc-shaped straightening ring 24, positioning plate 25, first limiting plate 26, and second limiting plate 27, pushes the L-shaped support frame 10 to move relative to each other. This causes the first arc-shaped lower pressing ring 16 and the second arc-shaped lower pressing ring 17 to move downwards synchronously, cooperating with the first lower arc-shaped straightening ring 23 at the bottom to hold the long shaft 7 tightly. During the contact process, unevenness or vibration on the surface of the long shaft 7 will compress the miniature damper 14. The damper plays a buffering and shock-absorbing role, protecting the surface of the long shaft from being crushed. At the same time, the telescopic rod 18 retracts and compresses the spring 19. The elastic force provides continuous and stable clamping force, which serves as a limit and flexible support. During the rotation of the long shaft 7, it is subjected to radial pressure from the arc-shaped rolling rings at the bottom and top. Utilizing the principle of plastic deformation of metal materials, the bent part is repeatedly rolled to gradually straighten its axis. After straightening is completed, the hydraulic cylinder 20 drives the hydraulic telescopic shaft 21 to retract, and the first lower arc-shaped straightening ring 23 moves down. The thrust on the L-shaped support frame 10 is released through the transmission mechanism. Under the rebound action of the spring 19, the first arc-shaped lower pressure ring 16 and the second arc-shaped lower pressure ring 17 are reset and released, the rotating motor 3 is stopped, and the straightened long shaft 7 is removed.

[0019] It should be noted that this utility model is a rotary rolling straightening device for slender shafts. In use, a rotary motor 3 provides power, which drives the rotary shaft 6 to rotate at high speed via a coupling 5, thereby driving the long shaft 7 installed at the end of the rotary shaft 6 to rotate synchronously. The rotation of the long shaft 7 is a prerequisite for achieving uniform straightening in the circumferential direction. Utilizing the sliding characteristics of the slider 9 in the moving groove 8, the L-shaped support frame 10 and its upper pressing component are adjusted to adjust their horizontal position. Through this step, the relative distance between the first arc-shaped lower pressing ring 16, the second arc-shaped lower pressing shaft ring 17, and the bottom first lower arc-shaped straightening ring 23 can be adjusted according to the diameter and bending position of the long shaft 7, ensuring that the long shaft 7 can be accurately aligned. The hydraulic cylinder 20 works, driving the hydraulic telescopic shaft 21 to lift upward, causing the mounting plate 22 and the first lower arc-shaped straightening ring 23 to make linear feed motion. The first lower arc-shaped straightening ring 23 contacts the bottom of the long shaft 7 and applies an upward straightening force. Simultaneously, the second lower arc-shaped straightening ring 24 transmits the force to the L-shaped support frame 10 through the positioning plate 25, the first limiting plate 26, and the second limiting plate 27. Due to the interaction of forces, the rise of the first lower arc-shaped straightening ring 23 synchronously drives the first arc-shaped lower pressure ring 16 and the second arc-shaped lower pressure ring 17 downwards or towards the center, thus forming a wrapping rolling structure around the long shaft 7. During the straightening process, to prevent rigid contact from damaging the surface of the long shaft, a micro-damper 14 absorbs the high-frequency vibration at the moment of contact. At the same time, the elastic extension and contraction characteristics of the telescopic rod 18 and the spring 19 provide flexible compensation for the straightening force, ensuring sufficient straightening pressure to cause plastic deformation of the long shaft while avoiding overload damage and improving the surface quality of the straightened shaft. Compared to the prior art and common existing technologies that rely on side frame adjustments to accommodate long shafts of varying lengths and use a limiting assembly at the top of the long shaft to fix both ends, ultimately using a cylinder-driven stamping assembly and stamping head to perform single-point or localized stamping straightening of the long shaft, while this solution can achieve basic fixing and straightening functions, it still has significant limitations in practical applications: First, the device uses a stamping head for point-contact straightening, which easily leaves indentations on the surface of the long shaft, and the rigid impact during the stamping process is difficult to eliminate, easily leading to stress concentration inside the workpiece; second, during the straightening process, the long shaft... Often in a static state, relying solely on the unidirectional force applied by the stamping head makes it difficult to ensure the uniformity of force in the circumferential direction, and it is impossible to improve the microscopic quality of the shaft surface during processing. This application realizes the "rotary rolling" straightening process by setting up a rotary drive system consisting of a rotary motor 3, a coupling 5, and a rotary shaft 6. Compared with the static stamping straightening of the prior art, it has significant advantages. In the prior art, the workpiece is in a static state after being fixed, and correction is only made by the linear movement of the stamping head from top to bottom. This static straightening method is difficult to eliminate roundness error and is prone to causing unidirectional cutting of metal fiber structure. In this application, a rotary motor 3 is used as the power source, and a coupling 5 drives the rotating shaft 6 and the long shaft 7 to rotate at high speed. During the straightening operation, the long shaft 7 is in a continuous rotation state. Combined with the radial feed of the straightening ring, continuous rolling of the outer circle of the long shaft is achieved. This structural design can not only effectively correct the straightness of the shaft, but also perform a finishing process on the surface of the long shaft through rolling, improving the surface hardness and reducing the surface roughness, achieving an integrated effect of straightening and surface strengthening. This application solves the problem of workpiece damage caused by rigid contact in the prior art by setting a flexible buffer mechanism composed of a micro damper 14, a telescopic rod 18, and a spring 19. In the prior art, the stamping head acts directly on the surface of the long shaft, which is a rigid hard contact. At the moment of contact, the impact force is large and there is no buffer, which can easily produce plastic indentations on the surface of the slender shaft, or even break due to overload.This application incorporates a miniature damper 14 between the support arm 12 and the lower pressure plate 15, and a telescopic rod 18, coordinated with a spring 19, is installed at the top of the first arc-shaped lower pressure ring 16 and the second arc-shaped lower pressure ring 17. When the first arc-shaped lower pressure ring 16 and the second arc-shaped lower pressure ring 17 contact the rotating long shaft 7, the miniature damper 14 can quickly absorb the high-frequency vibration generated at the moment of contact, thus achieving a buffering and shock-absorbing effect. Simultaneously, the coordination between the telescopic rod 18 and the spring 19 provides an adaptive elastic clamping force, ensuring the required straightening pressure while preventing excessive pressure from damaging the shaft surface, achieving the beneficial effect of "soft contact, strong straightening." This application also utilizes a hydraulic cylinder 20 to drive the first lower arc-shaped straightening ring 23, and coordinates with the linkage structure between the second lower arc-shaped straightening ring 24 and the L-shaped support frame 10 to achieve… This invention achieves a more uniform three-point rolling straightening process. Existing stamping heads typically apply force to the shaft from only one direction, easily leading to over-correction of the workpiece in the direction of force and resulting in reverse bending. In this application, the hydraulic cylinder 20 drives the hydraulic telescopic shaft 21 to raise the first lower arc-shaped straightening ring 23 located at the bottom in a straight line, applying an upward lifting force to the bottom of the long shaft 7. During this process, the first lower arc-shaped straightening ring 23, through the transmission of the second lower arc-shaped straightening ring 24, the positioning plate 25, the first limiting plate 26, and the second limiting plate 27, simultaneously drives the L-shaped support frame 10 and its end's first arc-shaped downward pressing ring 16 and second arc-shaped downward pressing ring 17 downward. This structural design allows for automatic enveloping and downward pressure on the long shaft from above while straightening from the bottom, creating a multi-point force state. Compared to the single-point stamping of existing technologies, this structure effectively disperses straightening stress, avoids stress concentration, significantly improves the straightness stability of the straightened slender shaft, and reduces springback.

[0020] 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 rotary rolling straightening device for slender shafts, comprising a support plate (1), a vertical plate (2), and a rotary motor (3), characterized in that: The output end of the rotary motor (3) is connected to a coupling (5), the output end of the coupling (5) is connected to a rotating shaft (6), a guide block (4) is installed on the outer wall of the rotating shaft (6), a long shaft (7) is connected to the output end of the rotating shaft (6), a moving groove (8) is opened at both ends of the support plate (1), a slider (9) is connected to the inner side of the moving groove (8), an L-shaped support frame (10) is installed at the end of the slider (9) away from the support plate (1), a connecting shaft (11) is connected to the inner side of the L-shaped support frame (10), and the connecting shaft (11) is away from the L-shaped support frame (10). One end of 10) is connected to a support arm (12), and a reinforcing rod (13) is installed on the inner side of the support arm (12). A micro damper (14) is provided at the bottom of the reinforcing rod (13), and a lower pressure plate (15) is installed at the bottom of the micro damper (14). A first arc-shaped lower pressure ring (16) and a second arc-shaped lower pressure ring (17) are respectively connected to both ends of the lower pressure plate (15). A telescopic rod (18) is connected to the top of the first arc-shaped lower pressure ring (16) and the second arc-shaped lower pressure ring (17) away from the micro damper (14). A spring (19) is installed on the outer wall of the telescopic rod (18).

2. The rotary rolling straightening device for slender shafts according to claim 1, characterized in that: A hydraulic cylinder (20) is installed at one end of the top of the support plate (1). The output end of the hydraulic cylinder (20) is connected to a hydraulic telescopic shaft (21). An installation plate (22) is installed at one end of the hydraulic telescopic shaft (21). A first lower arc straightening ring (23) is fixedly installed on the inner side of the installation plate (22). A second lower arc straightening ring (24) is installed at the end of the first lower arc straightening ring (23) away from the installation plate (22). A first limiting plate (26) is installed at one end of the second lower arc straightening ring (24). A positioning plate (25) is installed between two adjacent first limiting plates (26). A second limiting plate (27) is connected to one end of the first limiting plate (26).

3. The rotary rolling straightening device for slender shafts according to claim 1, characterized in that: The rotary motor (3) is connected to the rotating shaft (6) via the coupling (5), the rotating shaft (6) is rotatably connected to the long shaft (7), and the slider (9) is slidably connected to the inner side of the moving groove (8).

4. The rotary rolling straightening device for slender shafts according to claim 1, characterized in that: The slider (9) is fixedly connected to the L-shaped support frame (10), the L-shaped support frame (10) is rotatably connected to the connecting shaft (11), the connecting shaft (11) is rotatably connected to the support arm (12), and two adjacent support arms (12) are rotatably connected to the reinforcing rod (13).

5. The rotary rolling straightening device for slender shafts according to claim 1, characterized in that: The reinforcing rod (13) is fixedly connected to the micro damper (14), the micro damper (14) is fixedly connected to the lower pressure plate (15), and the lower pressure plate (15) is fixedly connected to the first arc-shaped lower pressure ring (16) and the second arc-shaped lower pressure ring (17) respectively.

6. The rotary rolling straightening device for slender shafts according to claim 1, characterized in that: The first arc-shaped pressure ring (16) and the second arc-shaped pressure ring (17) are rotatably connected to the telescopic rod (18), the telescopic rod (18) is fixedly connected to the spring (19), and the top of the telescopic rod (18) is rotatably connected to the bottom of the connecting shaft (11).

7. A rotary rolling straightening device for slender shafts according to claim 2, characterized in that: The hydraulic cylinder (20) is rotatably connected to the hydraulic telescopic shaft (21), the hydraulic telescopic shaft (21) is rotatably connected to the mounting plate (22), and two first lower arc straightening rings (23) are fixedly installed at one end of the mounting plate (22).

8. A rotary rolling straightening device for slender shafts according to claim 2, characterized in that: The first lower arc-shaped straightening ring (23) is fixedly connected to the second lower arc-shaped straightening ring (24), the second lower arc-shaped straightening ring (24) is threadedly fixedly connected to the first limiting plate (26), the first limiting plate (26) is rotatably connected to the second limiting plate (27), and the end of the second limiting plate (27) away from the first limiting plate (26) is rotatably connected to one end of the L-shaped support frame (10).

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