Multi-degree-of-freedom guide plate adjusting device and method of thin-walled composite pipe three-roll rolling mill
The multi-degree-of-freedom guide plate adjustment device enables precise adjustment of the guide plate, solving the problem of low guide plate adjustment efficiency in the three-roll skew mill, preventing jamming and tail triangle, and improving the forming quality and production continuity of composite pipes.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- TAIYUAN UNIVERSITY OF TECHNOLOGY
- Filing Date
- 2025-01-22
- Publication Date
- 2026-05-26
AI Technical Summary
The guide plate system of the existing three-roll skew rolling mill is inefficient during the adjustment process and cannot effectively avoid the tail triangle of the composite tube and the tearing of the outer tube, which leads to rolling jamming problems and affects production continuity and product quality.
A multi-degree-of-freedom guide plate adjustment device is adopted, which realizes precise adjustment of the radial, circumferential, axial and rotational angles of the guide plate through components such as hydraulic motor, drive motor and rotating platform. Combined with encoder and displacement sensor for parameter feedback, it ensures that the guide plate fits the roll and avoids metal squeezing and tail triangle phenomenon.
It improves the precision of guide plate adjustment and production efficiency, prevents jamming, and enhances the forming quality and production continuity of composite pipes.
Smart Images
Figure CN119870174B_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of thin-walled metal composite tube forming technology, specifically relating to a multi-degree-of-freedom guide plate adjustment device and method for a three-roll mill for thin-walled composite tubes. Background Technology
[0002] With the rapid development of industrial technology, the performance requirements for seamless metal pipes under extreme conditions are becoming increasingly stringent. Although some alloy pipes can meet these requirements, they are expensive and difficult to manufacture. Seamless metal composite pipes are made by combining component metals, which can fully utilize the performance advantages of the component metals and reduce the use of special metals, greatly improving the cost-effectiveness of the product. Therefore, they are widely used in aerospace, oil extraction, transportation of corrosive chemical media, military industry, nuclear power and other fields.
[0003] Three-roll skew rolling is a rolling process for manufacturing tubes with localized loading and large length-to-diameter ratios, widely used in the production of seamless metal tubes. This process boasts numerous advantages, including process stability, continuous forming, and high production efficiency, making it one of the most promising technologies for producing seamless metal composite tubes. The main rolling mill consists of three rolls and three guide plates. The three rolls are spaced at 120° intervals within the main mill, with a guide plate between every two rolls. The rolls apply deformation pressure to the composite tube, while the guide plates guide and restrict this deformation. During rolling, the composite tube blank undergoes severe plastic deformation, becoming triangular in shape. In severe cases, the outer wall of the metal tube can be squeezed into the gap between the guide plate and the rolls, causing jamming. Furthermore, during the final composite stage, the lack of a rear section of the metal tube to restrict deformation leads to a severe tail-triangle phenomenon, also resulting in jamming. These issues severely limit production continuity and product quality. Adjusting the position of the guide plates between the rolls can effectively improve jamming, increasing production efficiency and product quality.
[0004] Currently available three-roll skew rolling mills rely mainly on screws and nuts for unidirectional movement of the guide plates, which requires manual operation and measurement. This results in low efficiency, limited spatial freedom, and an inability to avoid tail triangle and outer tube tearing phenomena in composite pipes of specific materials and wall thicknesses.
[0005] Therefore, developing a guide plate system capable of high-precision automatic positioning and adjustment has become a pressing technical challenge. Summary of the Invention
[0006] The present invention addresses the above-mentioned problems by providing a multi-degree-of-freedom guide plate adjustment device and method for a three-roll mill for thin-walled composite tubes.
[0007] To achieve the above objectives, the present invention employs the following technical solution:
[0008] A multi-degree-of-freedom guide plate adjustment device for a three-roll mill for thin-walled composite tubes includes a slide block. An end cover is fixedly installed on the upper surface of the slide block. A hydraulic motor is fixedly installed on the upper surface of the end cover. The output shaft of the hydraulic motor passes through the end cover and is fixedly connected to a lead screw. A transmission block is threadedly connected to the lead screw. The transmission block is fixedly connected to a slide plate. A clearance hole for the lead screw is provided inside the slide plate. The slide plate is slidably installed in the slide block. A guide plate base is connected to the lower end of the slide plate. A guide plate is connected to the lower end of the guide plate base. A pressure plate is fixedly connected to the front end of the slide block by bolts. A locking cylinder is bolted to the pressure plate. The movable end of the locking cylinder abuts against the slide plate. The guide plate is fixedly installed on both the left and right sides of the slide block. A first slider and a second transmission block are fixedly provided. The second transmission block is threadedly connected to a second lead screw. One end of the second lead screw is fixedly connected to the output shaft of a drive motor. The drive motor is fixedly installed on the inner wall of the first housing. A first groove corresponding to the first slider is opened on the inner wall of the first housing. Cylinders are provided on both the left and right sides of the first housing. The other end of the cylinders is fixedly connected to the second housing. A second slider is fixedly provided on both the front and rear sides of the first housing. A second groove corresponding to the second slider is opened on the inner wall of the second housing. A rotating platform is provided on both the left and right sides of the second housing. The outer shell of the rotating platform is fixedly connected to the frame. The output shaft of the rotating platform is fixedly connected to the second housing through a flange.
[0009] Furthermore, copper slide bars are provided in the slide block, the first slide groove, and the second slide groove.
[0010] Furthermore, arc-shaped strips are provided on both the left and right sides of the second housing. These arc-shaped strips are used to cooperate with the arc-shaped grooves on the frame to support the multi-degree-of-freedom guide plate adjustment device.
[0011] Furthermore, the center of the arc-shaped strip is located on the rotation center line of the rotating platform.
[0012] Furthermore, encoders No. 1, No. 2, and No. 3 are respectively installed on the output shafts of the hydraulic motor, drive motor, and rotary platform. Encoders No. 1, No. 2, and No. 3 are all connected to the control console and are used to detect the displacement signals of the slide plate, the displacement signals of the slide block, and the rotation angle of the No. 2 housing, respectively. The cylinder has a built-in displacement sensor to detect the displacement signal of the No. 1 housing. The control console is also connected to the hydraulic motor, locking cylinder, drive motor, cylinder, and rotary platform and is used to control the operation of the hydraulic motor, locking cylinder, drive motor, cylinder, and rotary platform.
[0013] Furthermore, the guide plate is arc-shaped on the side closest to the roll to facilitate better contact between the guide plate and the roll, thereby preventing the outer tube wall from being rolled into the space between the guide plate and the roll.
[0014] Furthermore, a bevel is provided on the end face of the guide plate that contacts the tube, and the bevel is located on the side near the rolling inlet.
[0015] Furthermore, a retractable dust cover is fitted onto the lower part of the slide plate. The upper end of the retractable dust cover is fixedly connected to the lower end face of the slide block, and the lower end of the retractable dust cover is fixedly connected to the lower end of the slide plate.
[0016] A method for adjusting a multi-degree-of-freedom guide plate in a three-roll mill for thin-walled composite tubes includes radial position adjustment, circumferential position adjustment, rotation angle adjustment, and axial position adjustment, as detailed below:
[0017] Radial position adjustment: The hydraulic motor is started via the control console. The hydraulic motor is controlled to rotate forward or backward according to the target position of the guide plate. The hydraulic motor drives the first lead screw to rotate. As the first lead screw rotates, the first transmission block drives the slide plate and guide plate to move radially from the initial position to the target position. At the same time, the displacement distance of the guide plate is determined by the signal detected by the first encoder, and then it is determined whether the guide plate has moved to the target position. When the guide plate moves to the target position, the control console controls the hydraulic motor to stop working, and then controls the locking cylinder to extend to lock and fix the slide plate to ensure its position is stable, thus completing the radial position adjustment of the guide plate.
[0018] Circumferential position adjustment: The drive motor is started via the control console. The drive motor is controlled to rotate forward or backward according to the target position of the guide plate. The drive motor drives the No. 2 lead screw to rotate. As the No. 2 lead screw rotates, the No. 2 transmission block drives the slide and guide plate to move radially from the initial position to the target position. At the same time, the displacement distance of the slide and guide plate is determined by the signal detected by the No. 2 encoder, and then it is determined whether the guide plate has moved to the target position. When the guide plate moves to the target position, the control console controls the drive motor to stop working, thus completing the circumferential position adjustment of the guide plate.
[0019] Rotation angle adjustment: Start the rotating platform via the control console, and control the rotating platform to rotate forward or backward according to the target angle of the guide plate, thereby driving the second housing to rotate. At the same time, the angle of the guide plate is determined by the signal detected by the third encoder. When the guide plate is detected to have rotated to the target angle, the rotating platform stops working, and the adjustment of the guide plate rotation angle is completed.
[0020] Axial position adjustment: Based on the target position of the guide plate, the cylinder is controlled by the control console to work, thereby pushing the No. 1 housing to move. During the movement, the extension / retraction length of the cylinder is detected by the displacement sensor built into the cylinder. When the guide plate is detected to have reached the target position, the cylinder is controlled to stop working, thus completing the axial position adjustment of the guide plate.
[0021] Compared with the prior art, the present invention has the following advantages:
[0022] This invention can adjust the position of the guide plate radially, circumferentially and axially, as well as rotate it around the rotating platform, to ensure that the guide plate can be close to the roll. It can effectively solve the jamming phenomenon caused by metal being squeezed between the roll and the guide plate for some composite tubes that undergo severe plastic deformation, especially thin-walled composite tubes.
[0023] The guide plate of this invention is arc-shaped on the side closest to the roll, which allows the guide plate to fit better with the roll, thereby preventing the outer tube wall from being rolled between the guide plate and the roll. At the same time, the guide plate of this invention is provided with a beveled cut. When the composite tube is being laminated at the end, the guide plate can be moved towards the outlet direction in conjunction with the adjustment of the axial position of the guide plate, thereby releasing the constraint of the guide plate at the end of the composite tube and avoiding the jamming problem caused by large deformation due to the lack of subsequent restraint at the end of the composite tube.
[0024] This invention incorporates encoders No. 1, No. 2, and No. 3, along with a displacement sensor, for parameter feedback. This allows for precise reflection of the guide plate's position, thereby improving the guide plate's adjustment accuracy, simplifying the adjustment process, and increasing production efficiency. Attached Figure Description
[0025] Figure 1 This is a diagram showing the usage state of the present invention;
[0026] Figure 2 This is a schematic diagram of the assembly of the slide block and the slide plate of the present invention;
[0027] Figure 3 This is a schematic diagram of the structure of the present invention without a No. 1 shell;
[0028] Figure 4 This is a schematic diagram of the assembly of the pressure plate and the locking cylinder of the present invention;
[0029] Figure 5 This is a schematic diagram of the structure of the present invention without a second shell;
[0030] Figure 6 This is a schematic diagram of the structure of the first shell of the present invention;
[0031] Figure 7 This is a schematic diagram of the structure of the present invention;
[0032] Figure 8This is a schematic diagram of the structure of the second shell of the present invention;
[0033] In the diagram, 1 is a slide block, 2 is an end cap, 3 is a hydraulic motor, 4 is a lead screw, 5 is a transmission block, 6 is a slide plate, 7 is a guide plate base, 8 is a guide plate, 9 is a pressure plate, 10 is a locking cylinder, 11 is a slider, 12 is a transmission block, 13 is a lead screw, 14 is a drive motor, 15 is a housing, 16 is a slide groove, 17 is a cylinder, 18 is a housing, 19 is a slider, 20 is a slide groove, 21 is a rotating platform, 22 is an arc strip, 23 is a bevel, and 24 is a retractable dust cover. Detailed Implementation
[0034] To further illustrate the technical solution of the present invention, the present invention will be further described below through embodiments.
[0035] like Figures 1 to 8As shown, a multi-degree-of-freedom guide plate adjustment device for a three-roll mill of thin-walled composite tubes includes a slide block 1. An end cover 2 is fixedly installed on the upper end face of the slide block 1. A hydraulic motor 3 is fixedly installed on the upper surface of the end cover 2. The output shaft of the hydraulic motor 3 passes through the end cover 2 and is fixedly connected to a first lead screw 4. The first lead screw 4 is threadedly connected to a first transmission block 5. The first transmission block 5 is fixedly connected to a slide plate 6. A clearance hole for the first lead screw 4 is opened inside the slide plate 6. The slide plate 6 is slidably installed in the slide block 1. A guide plate base 7 is connected to the lower end of the slide plate 6. A retractable dust cover 24 is fitted on the lower part of the slide plate 6. The upper end of the dust cover 24 is fixedly connected to the lower end face of the slide block 1, and the lower end of the retractable dust cover 24 is fixedly connected to the lower end of the slide plate 6. A guide plate 8 is connected to the lower end of the guide plate base 7. The guide plate 8 is arc-shaped on the side near the roll to facilitate better contact between the guide plate 8 and the roll, thereby preventing the outer tube wall from being rolled between the guide plate 8 and the roll. A beveled cut 23 is provided on the end face of the guide plate 8 that contacts the tube, and the beveled cut 23 is located on the side near the rolling inlet. A pressure plate 9 is fixedly connected to the front end face of the slide block 1 by bolts. A locking cylinder 10 is bolted to the pressure plate 9. The movable end of the locking cylinder 10 is connected to the slide block 1. Plate 6 abuts against the slide block 1. A first slider 11 and a second transmission block 12 are fixedly installed on both the left and right sides of the slide block 1. The second transmission block 12 is threadedly connected to a second lead screw 13. One end of the second lead screw 13 is fixedly connected to the output shaft of a drive motor 14. The drive motor 14 is fixedly installed on the inner wall of the first housing 15. A first groove 16 corresponding to the first slider 11 is opened on the inner wall of the first housing 15. Cylinders 17 are installed on both the left and right sides of the first housing 15. The other end of each cylinder 17 is fixedly connected to a second housing 18. Second sliders 19 are fixedly installed on both the front and rear sides of the first housing 15. The inner wall of the second housing 18 is provided with a second slide groove 20 corresponding to the second slider 19. A rotating platform 21 is provided on both the left and right sides of the second housing 18. The outer shell of the rotating platform 21 is fixedly connected to the frame. The output shaft of the rotating platform 21 is fixedly connected to the second housing 18 through a flange. An arc-shaped strip 22 is provided on both the left and right sides of the second housing 18. The arc-shaped strip 22 is used to cooperate with the arc-shaped groove on the frame to support the multi-degree-of-freedom guide plate adjustment device. The center of the arc-shaped strip 22 is located on the rotation center line of the rotating platform 21. Copper slide bars are provided in the slide block 1, the first slide groove 16 and the second slide groove 20.
[0036] An encoder is provided on the output shaft of the hydraulic motor 3, the drive motor 14, and the rotating platform 21, respectively. The encoders are connected to the control console and are used to detect the displacement signal of the slide plate 6, the displacement signal of the slide block 1, and the rotation angle of the second housing 18. The cylinder 17 has a built-in displacement sensor to detect the displacement signal of the first housing 15. The control console is also connected to the hydraulic motor 3, the locking cylinder 10, the drive motor 14, the cylinder 17, and the rotating platform 21 to control the operation of the hydraulic motor 3, the locking cylinder 10, the drive motor 14, the cylinder 17, and the rotating platform 21.
[0037] A method for adjusting a multi-degree-of-freedom guide plate in a three-roll mill for thin-walled composite tubes includes radial position adjustment, circumferential position adjustment, rotation angle adjustment, and axial position adjustment, as detailed below:
[0038] Radial position adjustment: The hydraulic motor 3 is started by the control console. The hydraulic motor 3 is controlled to rotate forward or backward according to the target position of the guide plate 8. The hydraulic motor 3 drives the first lead screw 4 to rotate. As the first lead screw 4 rotates, the first transmission block 5 drives the slide plate 6 and the guide plate 8 to move radially from the initial position to the target position. At the same time, the displacement distance of the guide plate 8 is determined by the signal detected by the first encoder, and then it is determined whether the guide plate 8 has moved to the target position. When the guide plate 8 moves to the target position, the control console controls the hydraulic motor 3 to stop working, and then controls the locking cylinder 10 to extend and lock the slide plate 6 to ensure its position is stable, thus completing the radial position adjustment of the guide plate 8.
[0039] Circumferential position adjustment: The drive motor 14 is started via the control console. The drive motor 14 is controlled to rotate forward or backward according to the target position of the guide plate 8. The drive motor 14 drives the second lead screw 13 to rotate. As the second lead screw 13 rotates, the second transmission block 12 drives the slide 1 and the guide plate 8 to move radially from the initial position to the target position. At the same time, the displacement distance of the slide 1 and the guide plate 8 is determined by the signal detected by the second encoder, and then it is determined whether the guide plate 8 has moved to the target position. When the guide plate 8 moves to the target position, the control console controls the drive motor 14 to stop working, thus completing the circumferential position adjustment of the guide plate 8.
[0040] Rotation angle adjustment: Start the rotating platform 21 via the control console. Control the rotating platform 21 to rotate forward or backward according to the target angle of the guide plate 8, thereby driving the second housing 18 to rotate. At the same time, the angle of the guide plate 8 is determined by the signal detected by the third encoder. When the guide plate 8 is detected to have rotated to the target angle, the rotating platform 21 stops working, completing the adjustment of the rotation angle of the guide plate 8.
[0041] Axial position adjustment: Based on the target position of the guide plate 8, the cylinder 17 is controlled by the control console to work, thereby pushing the first housing 15 to move. During the movement, the extension / retraction length of the cylinder 17 is detected by the displacement sensor built into the cylinder 17. When the guide plate 8 is detected to have reached the target position, the cylinder 17 is controlled to stop working, thus completing the axial position adjustment of the guide plate 8.
[0042] The foregoing has shown and described the main features and advantages of the present invention. It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.
[0043] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A multi-degree-of-freedom guide plate adjusting device of a thin-walled composite pipe three-roll mill, characterized by: The system includes a slide block (1), an end cap (2) fixedly mounted on the upper surface of the slide block (1), a hydraulic motor (3) fixedly mounted on the upper surface of the end cap (2), the output shaft of the hydraulic motor (3) passing through the end cap (2) and fixedly connected to a lead screw (4), the lead screw (4) being threadedly connected to a transmission block (5), the transmission block (5) being fixedly connected to a slide plate (6), a clearance hole being provided inside the slide plate (6) for the lead screw (4) to make way, and the slide plate (6) being slidably mounted inside the slide block (1). A guide plate base (7) is connected to the lower end of the slide plate (6), and a guide plate (8) is connected to the lower end of the guide plate base (7). A bevel (23) is provided on the end face of the guide plate (8) that contacts the pipe, and the bevel (23) is located on the side near the rolling inlet. A pressure plate (9) is fixedly connected to the front end face of the slide block (1) by bolts. A locking cylinder (10) is connected to the pressure plate (9) by bolts. The movable end of the locking cylinder (10) abuts against the slide plate (6). A first slider (11) and a second transmission block (12) are fixedly installed on both the left and right sides. The second transmission block (12) is threadedly connected to the second lead screw (13). One end of the second lead screw (13) is fixedly connected to the output shaft of the drive motor (14). The drive motor (14) is fixedly installed on the inner wall of the first housing (15). A first groove (16) corresponding to the first slider (11) is opened on the inner wall of the first housing (15). A cylinder (17) is provided on both the left and right sides of the first housing (15). The other end of the cylinder (17) is fixedly connected to the second housing (18). The second slider (19) is fixedly installed on both the front and rear sides of the first housing (15). The second groove (20) corresponding to the second slider (19) is opened on the inner side wall of the second housing (18). The rotating platform (21) is installed on both the left and right sides of the second housing (18). The outer shell of the rotating platform (21) is fixedly connected to the frame. The output shaft of the rotating platform (21) is fixedly connected to the second housing (18) through a flange.
2. The multi-degree-of-freedom guide plate adjusting device of a three-roll mill for a thin-walled composite pipe according to claim 1, characterized in that: Copper slide bars are provided in the slide block (1), the first slide groove (16) and the second slide groove (20).
3. The multi-degree-of-freedom guide adjustment device of a three-roll thin-walled composite pipe rolling mill according to claim 1, characterized in that: Arc-shaped strips (22) are provided on both the left and right sides of the second housing (18). The arc-shaped strips (22) are used to cooperate with the arc-shaped grooves on the frame to support the multi-degree-of-freedom guide plate adjustment device.
4. The multi-degree-of-freedom guide adjustment device of a three-roll thin-walled composite pipe rolling mill according to claim 3, characterized in that: The center of the arc-shaped strip (22) is located on the rotation center line of the rotating platform (21).
5. The multi-degree of freedom guide adjustment device of a three-roll thin-walled composite pipe rolling mill according to claim 1, characterized in that: An encoder is provided on the output shaft of the hydraulic motor (3), the drive motor (14) and the rotating platform (21), respectively. The encoders are connected to the control console and are used to detect the displacement signal of the slide plate (6), the displacement signal of the slide block (1) and the rotation angle of the second housing (18). The cylinder (17) has a built-in displacement sensor to detect the displacement signal of the first housing (15). The control console is also connected to the hydraulic motor (3), the locking cylinder (10), the drive motor (14), the cylinder (17) and the rotating platform (21) to control the operation of the hydraulic motor (3), the locking cylinder (10), the drive motor (14), the cylinder (17) and the rotating platform (21).
6. The multi-degree of freedom guide adjustment device of a three-roll thin-walled composite pipe rolling mill according to claim 1, characterized in that: The guide plate (8) is arc-shaped on the side near the roll so that the guide plate (8) fits better with the roll, thereby preventing the outer tube wall from being rolled into the space between the guide plate (8) and the roll.
7. The multi-degree of freedom guide adjustment device of a three-roll thin-walled composite pipe rolling mill according to claim 1, characterized in that: A retractable dust cover (24) is fitted on the lower part of the slide plate (6). The upper end of the retractable dust cover (24) is fixedly connected to the lower end face of the slide block (1), and the lower end of the retractable dust cover (24) is fixedly connected to the lower end of the slide plate (6).
8. A method for adjusting the multi-degree-of-freedom guide plate of a thin-walled composite tube three-roll mill using the multi-degree-of-freedom guide plate adjustment device of claim 5, characterized in that: This includes radial position adjustment, circumferential position adjustment, rotation angle adjustment, and axial position adjustment, as detailed below: Radial position adjustment: Start the hydraulic motor (3) through the control console, and control the hydraulic motor (3) to rotate forward or reverse according to the target position of the guide plate (8). Drive the first lead screw (4) to rotate through the hydraulic motor (3). As the first lead screw (4) rotates, the first transmission block (5) drives the slide plate (6) and the guide plate (8) to move radially from the initial position to the target position. At the same time, the displacement distance of the guide plate (8) is determined by the signal detected by the first encoder, and then it is determined whether the guide plate (8) has moved to the target position. When the guide plate (8) moves to the target position, the control console controls the hydraulic motor (3) to stop working, and then controls the locking cylinder (10) to extend and lock the slide plate (6) to ensure its stable position and complete the radial position adjustment of the guide plate (8). Circumferential position adjustment: Start the drive motor (14) through the console, and control the drive motor (14) to rotate forward or reverse according to the target position of the guide plate (8). Drive the second lead screw (13) to rotate through the drive motor (14). As the second lead screw (13) rotates, the second transmission block (12) drives the slide (1) and the guide plate (8) to move radially from the initial position to the target position. At the same time, the displacement distance of the slide (1) and the guide plate (8) is determined by the signal detected by the second encoder, and then it is determined whether the guide plate (8) has moved to the target position. When the guide plate (8) moves to the target position, the console controls the drive motor (14) to stop working, and the circumferential position adjustment of the guide plate (8) is completed. Rotation angle adjustment: Start the rotating platform (21) through the control console, control the rotating platform (21) to rotate forward or backward according to the target angle of the guide plate (8), thereby driving the second housing (18) to rotate. At the same time, the angle of the guide plate (8) is determined by the signal detected by the third encoder. When the guide plate (8) is detected to rotate to the target angle, the rotating platform (21) stops working, and the rotation angle adjustment of the guide plate (8) is completed. Axial position adjustment: According to the target position of the guide plate (8), the cylinder (17) is controlled by the control console to work, thereby pushing the first housing (15) to move. During the displacement process, the extension / retraction length of the cylinder (17) is detected by the displacement sensor built into the cylinder (17). When the guide plate (8) is detected to reach the target position, the cylinder (17) is controlled to stop working, thus completing the axial position adjustment of the guide plate (8).