Hot rolling coiling side guide opening adjusting device

Abstract

The application provides a hot rolling coiling side guide opening adjusting device, which comprises a machine base, a sliding frame and a sliding block slidably arranged on the machine base, the sliding frame and the sliding block being fixed through a flexible connecting plate, one side of the sliding frame being provided with a side guide, the machine base being further provided with a servo motor, an output end of the servo motor being connected with a screw rod transmission pair fixed on the sliding block, an output end of the screw rod transmission pair being fixedly connected with a driving rod, the driving rod and a driven rod jointly constituting a coaxial segmented push rod, a front end of the driven rod being fixedly connected with the sliding frame, a rear end of the driven rod being provided with a pre-tightening sleeve, a pre-tightening spring being coaxially arranged in the pre-tightening sleeve, the driving rod extending into the pre-tightening sleeve and elastically abutting against the pre-tightening spring, the pre-tightening sleeve being provided with an embedded displacement sensor, the embedded displacement sensor being used for detecting the relative displacement between the driving rod and the driven rod, the machine base being further provided with a laser ranging sensor, and the laser ranging sensor being opposite to the sliding frame to detect the absolute displacement of the side guide.

Description

Technical Field

[0001] This invention relates to the field of metallurgical machinery technology, and in particular to a device for adjusting the opening of the hot rolling coil side guide plate. Background Technology

[0002] Before hot-rolled strip steel enters the coiler, it typically needs to be guided by side guide plates to limit strip deviation and ensure coil shape. Existing side guide plate opening adjustment devices mostly use servo motors, screw drives, or hydraulic cylinders to directly drive the side guide plate laterally, and their force transmission path is usually a rigid connection structure. When the strip head enters the coiling area at high speed, it is prone to instantaneous lateral impact on the side guide plate. This impact force is directly transmitted along the side guide plate, sliding frame, and transmission rods to the screw drive and drive motor, easily causing impact to the transmission pair, loosening of connections, and a decrease in the adjustment accuracy of the side guide plate.

[0003] Meanwhile, during the stabilization process of the strip, the side guide plate needs to maintain a relatively accurate opening position while also being subjected to continuous pressure from the strip edge. Existing devices typically determine the side guide plate position based solely on a motor encoder or a single position detection signal, making it difficult to distinguish the relationship between the actual opening deviation of the side guide plate and the stress deformation of the transmission rod. When strip impact, continuous pressure, mechanical clearance, and thermal deformation coexist, a purely rigid push rod structure cannot provide relative displacement information reflecting the stress state, and the controller also struggles to output appropriate drive actions based on different mechanical states. Summary of the Invention

[0004] The present invention aims to solve the above-mentioned technical problems by providing a device for adjusting the opening degree of the hot-rolled coiling side guide plate.

[0005] The technical solution of the present invention is a hot-rolled coiling side guide plate opening adjustment device, including a machine base, on which a sliding frame and a sliding block are slidably arranged, the sliding frame and the sliding block are fixed together by a flexible connecting plate, a side guide plate is provided on one side of the sliding frame, a servo motor is also provided on the machine base, the output end of the servo motor is connected to a screw drive pair fixed on the sliding block, the output end of the screw drive pair is fixedly connected to a drive rod, the drive rod and the driven rod together constitute a coaxial segmented push rod, and the front end of the driven rod is fixedly connected to the sliding frame; The rear end of the driven rod is provided with a pre-tightening sleeve, and a pre-tightening spring is coaxially arranged inside the pre-tightening sleeve. The drive rod extends into the pre-tightening sleeve and elastically abuts against the pre-tightening spring. The pre-tightening sleeve is provided with a built-in displacement sensor, which is used to detect the relative displacement between the drive rod and the driven rod. The base is also provided with a laser rangefinder, which faces the sliding frame to detect the absolute displacement of the side guide plate. The servo motor, the built-in displacement sensor, and the laser rangefinder are all connected to the controller. The controller controls the drive output of the servo motor based on the relative displacement change rate detected by the built-in displacement sensor and the absolute displacement deviation value detected by the laser rangefinder.

[0006] In one embodiment, a pair of linear guide rails are provided parallel and symmetrically on the base, and the bottoms of the sliding frame and the sliding block are slidably engaged with the linear guide rails.

[0007] In one embodiment, the pre-tightening sleeve is coaxially provided with a force-transmitting abutment that can slide axially inside. One axial end face of the force-transmitting abutment abuts against the pre-tightening spring, and the other axial end face of the force-transmitting abutment abuts against the built-in displacement sensor.

[0008] In one embodiment, the force-transmitting contact member has a T-shaped structure, including a disc-shaped base and a columnar guide extending axially from the center of the base. One axial end face of the base abuts against the pre-tension spring, and the columnar guide is coaxially inserted into the inner cavity of the pre-tension spring. The other axial end face of the base abuts against the built-in displacement sensor.

[0009] In one embodiment, the preload sleeve has an internal thread on the inner wall of the opening offset from the driven rod, and a preload nut is rotatably provided on the driven rod. The threaded end of the preload nut engages with the internal thread and abuts against the preload spring. The initial preload force of the preload spring is adjusted by rotating the preload nut.

[0010] In one embodiment, a long strip-shaped detection target plate is horizontally fixed on the side of the sliding frame facing the laser ranging sensor. The surface flatness of the detection target plate is less than a preset value, and its length direction is parallel to the sliding direction of the sliding frame.

[0011] In one embodiment, the pre-tightening sleeve is provided with a sealing ring near the opening of the driven rod, and the sealing ring is tightly fitted on the outer periphery of the drive rod.

[0012] In one embodiment, a front limit switch and a rear limit switch are respectively provided on the base at the front and rear limit positions of the sliding trajectory of the sliding frame, and both the front limit switch and the rear limit switch are connected to the controller.

[0013] In one implementation, the controller is configured to acquire the relative displacement change rate, relative displacement hold-up, and absolute displacement deviation value output by the built-in displacement sensor and the laser rangefinder sensor within a continuous sampling period. When the relative displacement change rate is greater than the preset impact threshold, the controller suppresses the opening compensation command formed based on the absolute displacement deviation value, and outputs a position holding command or a reverse avoidance command to the servo motor, so that the drive rod and the driven rod form an elastic yield through the pre-tension spring; When the relative displacement change rate is less than or equal to the preset impact threshold, the relative displacement holding amount is continuously greater than the preset pre-tightening offset threshold, and the absolute displacement deviation value is greater than the preset opening deviation threshold, the controller controls the servo motor to drive forward or in reverse according to the direction of the absolute displacement deviation value, so as to adjust the opening of the side guide plate.

[0014] In one implementation, the controller is further configured to perform clearance self-calibration in a non-through-plate state: controlling the servo motor to drive the lead screw transmission pair to move slightly along a first direction, and recording the first theoretical displacement corresponding to the actual absolute displacement change fed back by the laser rangefinder when it reaches a preset effective response threshold; subsequently controlling the servo motor to drive the lead screw transmission pair to move slightly along a second direction opposite to the first direction, and recording the second theoretical displacement corresponding to the actual absolute displacement change again reaching the preset effective response threshold; the controller determines the invalid displacement interval between the first theoretical displacement and the second theoretical displacement as the reverse mechanical clearance of the lead screw transmission pair, and when the servo motor reverses direction or sets the initial opening, adds the reverse mechanical clearance to the drive displacement in the corresponding direction.

[0015] The advantages of this invention compared to existing technologies are that the hot-rolled coiling side guide plate opening adjustment device uses a segmented push rod with the drive rod and driven rod set as coaxial, and a pre-tensioning sleeve and pre-tensioning spring between them. This allows the side guide plate to form an elastic buffer when impacted by the strip head, preventing the instantaneous impact from being directly transmitted to the lead screw drive pair and servo motor. Simultaneously, a built-in displacement sensor detects the relative displacement between the drive rod and driven rod, and a laser rangefinder detects the absolute displacement of the side guide plate, enabling the controller to simultaneously obtain the relative displacement change rate and the absolute displacement deviation value. Therefore, the controller can control the drive output of the servo motor according to different detection signals, giving the side guide plate buffering capability when impacted and position adjustment capability when the opening deviates, thereby improving the stability and reliability of the side guide plate opening adjustment during hot rolling coiling. Attached Figure Description

[0016] Figure 1 A schematic diagram of the hot-rolled coiling side guide plate opening adjustment device provided in an embodiment of the present invention; Figure 2 This is a partial enlarged cross-sectional view of the pre-tightening sleeve in the hot-rolled coiling side guide plate opening adjustment device provided in an embodiment of the present invention.

[0017] In the diagram: 1. Base; 2. Sliding frame; 3. Sliding block; 4. Flexible connecting plate; 5. Side guide plate; 6. Servo motor; 7. Lead screw transmission pair; 8. Drive rod; 9. Driven rod; 10. Preload sleeve; 11. Preload spring; 12. Built-in displacement sensor; 13. Laser rangefinder; 14. Controller; 15. Linear guide rail; 16. Force transmission abutment; 17. Base; 18. Columnar guide part; 19. Internal thread; 20. Preload nut; 21. Detection target plate; 22. Sealing ring; 23. Front limit switch; 24. Rear limit switch. Detailed Implementation

[0018] The above and other embodiments and advantages of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0019] In one implementation, such as Figure 1 As shown, this embodiment provides a hot-rolled coiling side guide plate opening adjustment device, which can be installed at the hot-rolled coiling inlet to guide the edge of the strip before it enters the coiler. The device adjusts the opening of the side guide plate 5 based on the impact of the strip head, lateral extrusion during the stabilization process, and displacement deviation of the transmission mechanism. The device includes a base 1, which serves as the mounting foundation and can be fixed to the support frames on both sides of the coiling inlet. A sliding frame 2 and a sliding block 3 are slidably mounted on the base 1. The sliding frame 2 and the sliding block 3 are fixed together by a flexible connecting plate 4, forming a synchronously moving unit. The side guide plate 5 is located on one side of the sliding frame 2, and its surface facing the strip edge is positioned opposite the strip edge to limit lateral strip displacement. A servo motor 6 is also mounted on the base 1. The output end of the servo motor 6 is connected to a lead screw drive pair 7, which is fixed to the sliding block 3. When the servo motor 6 is working, the lead screw drive pair 7 converts the rotational output of the servo motor 6 into a linear output, thereby driving the sliding block 3, flexible connecting plate 4, sliding frame 2, and side guide plate 5 to move in a direction close to or away from the edge of the strip. The output end of the lead screw drive pair 7 is fixedly connected to the drive rod 8. The drive rod 8 and the driven rod 9 are coaxially arranged and together form a segmented push rod. The front end of the driven rod 9 is fixedly connected to the sliding frame 2. Thus, the driving force of the servo motor 6 is transmitted to the sliding frame 2 through the lead screw drive pair 7, drive rod 8, and driven rod 9 to realize the adjustment of the opening degree of the side guide plate 5.

[0020] like Figure 1 and Figure 2As shown, a preload sleeve 10 is provided at the rear end of the driven rod 9. A preload spring 11 is coaxially arranged inside the preload sleeve 10. The drive rod 8 extends into the preload sleeve 10 and elastically abuts against the preload spring 11. The preload spring 11 has an initial preload force in the assembled state, so that the drive rod 8 and the driven rod 9 maintain continuous force transmission during normal adjustment. When the strip head hits the side guide plate 5 or the strip edge continuously squeezes the side guide plate 5, the driven rod 9 can generate a small axial displacement relative to the drive rod 8, and the preload spring 11 will be compressed accordingly. In this way, the segmented push rod can transmit normal adjustment force and form an elastic buffer when subjected to impact, avoiding the instantaneous impact on the side guide plate 5 from being directly transmitted to the lead screw drive pair 7 and the servo motor 6. A built-in displacement sensor 12 is provided inside the preload sleeve 10. The built-in displacement sensor 12 is used to detect the relative displacement between the drive rod 8 and the driven rod 9. The built-in displacement sensor 12 does not detect the overall movement position of the side guide plate 5, but rather the relative compression caused by force changes inside the segmented push rod. Therefore, it can directly reflect the instantaneous impact or continuous compression experienced by the side guide plate 5. A laser rangefinder sensor 13 is also provided on the base 1, facing the sliding frame 2, to detect the absolute displacement of the side guide plate 5 after it moves with the sliding frame 2. Thus, the built-in displacement sensor 12 provides information on the force-displacement inside the push rod, and the laser rangefinder sensor 13 provides information on the actual opening position of the side guide plate 5. These two types of detection signals correspond to different mechanical states. The servo motor 6, the built-in displacement sensor 12, and the laser rangefinder sensor 13 are all connected to the controller 14. The controller 14 can be a PLC. The controller 14 controls the drive output of the servo motor 6 based on the relative displacement change rate detected by the built-in displacement sensor 12 and the absolute displacement deviation value detected by the laser rangefinder sensor 13. Since the relative displacement change rate can reflect the speed of the impact, and the absolute displacement deviation value can reflect the degree to which the actual opening of the side guide plate 5 deviates from the target opening, the controller 14 can distinguish between impact protection and opening compensation, so that the side guide plate 5 can withstand the impact of the strip head and maintain the opening accuracy when the plate passes through stably.

[0021] In one embodiment, a pair of linear guide rails 15 are provided parallel and symmetrically on the base 1, and the bottoms of the sliding frame 2 and the sliding block 3 are slidably engaged with the linear guide rails 15. The two linear guide rails 15 extend along the opening adjustment direction of the side guide plate 5 and are located on both sides below the sliding frame 2 and the sliding block 3, respectively. The sliding frame 2 and the sliding block 3 are guided by the linear guide rails 15, which can maintain a relatively stable linear motion direction after being subjected to force, reducing the swaying of the side guide plate 5 when subjected to the lateral force of the strip. Since the sliding frame 2 and the sliding block 3 move on the same set of linear guide rails 15, the adjustment stroke output by the servo motor 6 can be transmitted to the side guide plate 5 more stably, which also facilitates the detection by the laser rangefinder 13.

[0022] In one implementation, such as Figure 2As shown, a force-transmitting abutment 16 is coaxially mounted inside the preload sleeve 10 and is axially slidable. One axial end face of the force-transmitting abutment 16 abuts against the preload spring 11, and the other axial end face abuts against the built-in displacement sensor 12. When the drive rod 8 tends to compress relative to the driven rod 9, the deformation of the preload spring 11 is transmitted to the built-in displacement sensor 12 via the force-transmitting abutment 16. The force-transmitting abutment 16 can convert the elastic compression of the preload spring 11 into a more stable axial detection displacement, avoiding the direct impact of local deflection or point contact at the end of the preload spring 11 on the detection stability of the built-in displacement sensor 12.

[0023] In one embodiment, the force-transmitting contact member 16 has a T-shaped structure, including a disc-shaped base 17 and a columnar guide portion 18 extending axially from the center of the base 17. One axial end face of the base 17 abuts against the preload spring 11, and the columnar guide portion 18 is coaxially inserted into the inner cavity of the preload spring 11. By guiding the preload spring 11 inward through the columnar guide portion 18, bending and displacement of the preload spring 11 during repeated compression can be reduced.

[0024] In one implementation, such as Figure 2 As shown, the preload sleeve 10 has an internal thread 19 on its inner wall offset from the opening of the driven rod 9, and a preload nut 20 is rotatably mounted on the driven rod 9. The threaded end of the preload nut 20 engages with the internal thread 19 and abuts against the preload spring 11. During assembly or maintenance, the initial compression of the preload spring 11 can be changed by rotating the preload nut 20, thereby adjusting the initial preload force of the preload spring 11. When the strip steel is thicker, the running speed is higher, or the head impact is greater, the initial preload force can be appropriately increased; when it is necessary to improve the response sensitivity of the push rod to small compressions, the initial preload force can be appropriately decreased. After adjustment, the preload nut 20 can be prevented from loosening during operation by the anti-loosening structure.

[0025] In one implementation, such as Figure 1 As shown, a long strip-shaped detection target plate 21 is horizontally fixed on the side of the sliding frame 2 facing the laser rangefinder 13. The surface flatness of the detection target plate 21 is less than a preset value, and its length direction is parallel to the sliding direction of the sliding frame 2. The detection target plate 21 is used to provide a stable detection surface for the laser rangefinder 13, avoiding the laser rangefinder 13 from directly irradiating the irregular surface on the sliding frame 2 and causing distance fluctuations. Since the detection target plate 21 moves synchronously with the sliding frame 2, the distance change detected by the laser rangefinder 13 can correspond to the actual opening change of the side guide plate 5.

[0026] In one implementation, such as Figure 2As shown, a sealing ring 22 is provided near the opening of the driven rod 9 in the preload sleeve 10, and the sealing ring 22 is tightly fitted on the outer periphery of the drive rod 8. In the hot rolling mill, there is iron oxide scale, dust, and water mist; the sealing ring 22 is used to prevent external impurities from entering the interior of the preload sleeve 10. Since the preload sleeve 10 contains a preload spring 11, a force-transmitting abutment component 16, and a built-in displacement sensor 12, the sealing ring 22 provides protection, reducing the impact of impurities on the preload spring 11 and the built-in displacement sensor 12.

[0027] In one implementation, such as Figure 1 As shown, a front limit switch 23 and a rear limit switch 24 are respectively provided on the base 1 at the front and rear limit positions of the sliding trajectory of the sliding frame 2. Both the front limit switch 23 and the rear limit switch 24 are connected to the controller 14. When the sliding frame 2 moves towards the edge of the strip to the front limit position, the front limit switch 23 outputs a limit signal to the controller 14; when the sliding frame 2 moves away from the edge of the strip to the rear limit position, the rear limit switch 24 outputs a limit signal to the controller 14. After receiving the corresponding limit signal, the controller 14 restricts the servo motor 6 from continuing to drive in the corresponding direction, thereby preventing the sliding frame 2 from overextending or retracting.

[0028] In one embodiment, the controller 14 acquires the relative displacement signal output by the built-in displacement sensor 12 according to a continuous sampling cycle during the strip's operation, and obtains the relative displacement change rate based on the change of the relative displacement signal within adjacent sampling cycles. Simultaneously, the controller 14 obtains the relative displacement holding amount based on the continuous deviation of the relative displacement over multiple consecutive sampling cycles. The controller 14 also acquires the actual absolute displacement output by the laser rangefinder 13, and compares this actual absolute displacement with the reference displacement corresponding to the target opening to obtain the absolute displacement deviation value. The relative displacement change rate, relative displacement holding amount, and absolute displacement deviation value together serve as the basis for the controller 14 to select the drive output. When the strip head enters the coiling inlet area and impacts the side guide plate 5, the instantaneous lateral force on the side guide plate 5 is transmitted to the pre-tensioning sleeve 10 via the sliding frame 2 and the driven rod 9, causing the pre-tensioning spring 11 to be further compressed in a short time. At this time, the relative displacement output by the built-in displacement sensor 12 changes rapidly, and the relative displacement change rate increases. If the relative displacement change rate is greater than the preset impact threshold, the controller 14 considers it inappropriate to immediately perform opening compensation based on the absolute displacement deviation value detected by the laser rangefinder 13. Therefore, it suppresses the opening compensation command based on the absolute displacement deviation value and outputs a position holding command or a reverse avoidance command to the servo motor 6. The position holding command is used to keep the servo motor 6 in its current output position to prevent the lead screw transmission pair 7 from following erroneously at the moment of impact. The reverse avoidance command is used to make the servo motor 6 move back slightly, so that the drive rod 8 and the driven rod 9 can form an elastic clearance through the preload spring 11. After the strip enters the stable plate stage, the edge of the strip may continuously squeeze the side guide plate 5 due to deviation, or the actual opening of the side guide plate 5 and the transmission mechanism may gradually deviate from the set value due to heat, wear, or gap changes. This type of state usually does not cause a sudden increase in the relative displacement change rate, but will manifest as a low relative displacement change rate, a relative displacement holding amount that is continuously greater than the preset preload offset threshold in the continuous sampling period, and an absolute displacement deviation value output by the laser rangefinder 13 that is greater than the preset opening deviation threshold. When the above conditions are met, the controller 14 controls the servo motor 6 to drive in the forward or reverse direction according to the direction of the absolute displacement deviation value, so as to adjust the opening of the side guide plate 5.

[0029] In this way, the controller 14 does not adjust solely based on the positional deviation of the side guide plate 5. Instead, it first uses the relative displacement change rate output by the built-in displacement sensor 12 to identify whether there is a transient impact, and then combines the relative displacement holding amount and the absolute displacement deviation value to determine whether an opening correction needs to be performed. Thus, when the strip head impacts, the preload spring 11 takes priority in buffering, and the servo motor 6 avoids miscompensation; when stabilizing the strip, the servo motor 6 can also make timely corrections based on the actual opening deviation, so that the mechanical elasticity yielding and servo adjustment work together.

[0030] In one embodiment, the controller 14 is further configured to perform gap self-calibration in a non-through-plate state. The non-through-plate state can be a preparation stage where the strip has not yet entered the winding entry area, or an interval stage where the previous coil of strip has been wound and the next coil has not yet arrived. In this state, the side guide plate 5 is not squeezed by the strip edge, and the controller 14 can use the servo motor 6 and the laser rangefinder 13 to detect the reverse mechanical clearance of the lead screw drive pair 7 and its connecting mechanism. Specifically, the controller 14 first controls the servo motor 6 to drive the lead screw drive pair 7 to move slightly in a first direction, and reads the theoretical displacement fed back by the servo motor 6 and the actual absolute displacement change fed back by the laser rangefinder 13. In the initial stage of the slight movement, although the servo motor 6 has generated a theoretical displacement, the actual absolute displacement of the sliding frame 2 may not have changed effectively due to possible reverse clearance or slight looseness between the lead screw drive pair 7, the sliding block 3, the flexible connecting plate 4, and the sliding frame 2. When the actual absolute displacement change fed back by the laser rangefinder 13 reaches a preset effective response threshold, the controller 14 records the corresponding first theoretical displacement. Subsequently, the controller 14 controls the servo motor 6 to drive the lead screw transmission pair 7 to move slightly in a second direction opposite to the first direction, and continues to read the theoretical displacement of the servo motor 6 and the actual absolute displacement change fed back by the laser rangefinder 13. In the initial stage of commutation, the transmission mechanism needs to eliminate the reverse mechanical backlash, so it is possible that the theoretical displacement of the servo motor 6 has changed, but the actual absolute displacement of the sliding frame 2 has not yet responded effectively. When the actual absolute displacement change reaches the preset effective response threshold again, the controller 14 records the corresponding second theoretical displacement. The controller 14 determines the invalid displacement interval between the first and second theoretical displacements as the reverse mechanical backlash of the lead screw transmission pair 7. This invalid displacement interval reflects the travel range where the output of the servo motor 6 has changed, but the actual opening of the side guide plate 5 has not yet changed effectively. Compared to relying solely on the encoder of the servo motor 6 for position control, this method can include the actual mechanical lag between the sliding block 3, the flexible connecting plate 4, the sliding frame 2, and the lead screw transmission pair 7 within the calibration range.

[0031] During subsequent servo motor 6 reversing drive or initial opening setting, controller 14 superimposes the reverse mechanical backlash into the drive displacement in the corresponding direction. That is, when servo motor 6 needs to switch from one direction to another for opening adjustment, controller 14 first fills the invalid displacement range in that direction, and then performs effective opening adjustment. Through clearance self-calibration in non-through-plate state, the reverse mechanical backlash can be updated before each through-plate operation or within a set cycle, making the actual opening of side guide plate 5 closer to the set opening, reducing the opening error caused by wear of lead screw transmission pair 7 and increased clearance of sliding parts after long-term use.

[0032] In summary, this hot-rolled coiling side guide plate opening adjustment device, through the cooperation of the machine base 1, sliding frame 2, sliding block 3, flexible connecting plate 4, side guide plate 5, servo motor 6, lead screw transmission pair 7, drive rod 8, driven rod 9, pre-tension sleeve 10, pre-tension spring 11, built-in displacement sensor 12, laser rangefinder 13, and controller 14, enables the side guide plate opening adjustment device to simultaneously possess elastic buffering, relative displacement detection, absolute displacement detection, and reverse clearance compensation capabilities. When the strip head impacts, the device can provide elastic relief through the pre-tension spring 11; when stabilizing the strip, it can adjust the opening of the side guide plate 5 according to the absolute displacement deviation value; and it can self-calibrate the reverse mechanical clearance in the non-stripping state, thereby improving the stability and reliability of the side guide plate opening adjustment during hot rolling coiling.

[0033] The specific embodiments described above further illustrate the inventive purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the scope of protection of the present invention. In particular, it should be noted that any modifications, equivalent substitutions, or improvements made by those skilled in the art within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A device for adjusting the opening degree of a hot-rolled coiling side guide plate, characterized in that, Includes a base (1), on which a sliding frame (2) and a sliding block (3) are slidably arranged. The sliding frame (2) and the sliding block (3) are fixed together by a flexible connecting plate (4). A side guide plate (5) is provided on one side of the sliding frame (2). A servo motor (6) is also provided on the base (1). The output end of the servo motor (6) is connected to a lead screw transmission pair (7) fixed on the sliding block (3). The output end of the lead screw transmission pair (7) is fixedly connected to a drive rod (8). The drive rod (8) and the driven rod (9) together form a coaxial segmented push rod. The front end of the driven rod (9) is fixedly connected to the sliding frame (2). The rear end of the driven rod (9) is provided with a pre-tightening sleeve (10), and a pre-tightening spring (11) is coaxially arranged inside the pre-tightening sleeve (10). The drive rod (8) extends into the pre-tightening sleeve (10) and elastically abuts against the pre-tightening spring (11). The pre-tightening sleeve (10) is provided with a built-in displacement sensor (12), which is used to detect the relative displacement between the drive rod (8) and the driven rod (9). The base (1) is also provided with a laser rangefinder (13), which faces the sliding frame (2) to detect the absolute displacement of the side guide plate (5). The servo motor (6), the built-in displacement sensor (12), and the laser rangefinder (13) are all connected to the controller (14). The controller (14) controls the drive output of the servo motor (6) based on the relative displacement change rate detected by the built-in displacement sensor (12) and the absolute displacement deviation value detected by the laser rangefinder (13).

2. The hot-rolled coiling side guide plate opening adjustment device according to claim 1, characterized in that, A pair of linear guide rails (15) are provided parallel and symmetrically on the base (1), and the bottoms of the sliding frame (2) and the sliding block (3) are slidably engaged with the linear guide rails (15).

3. The hot-rolled coiling side guide plate opening adjustment device according to claim 1, characterized in that, The pre-tightening sleeve (10) is coaxially provided with a force-transmitting abutment (16) that can slide axially. One axial end face of the force-transmitting abutment (16) abuts against the pre-tightening spring (11), and the other axial end face of the force-transmitting abutment (16) abuts against the built-in displacement sensor (12).

4. The hot-rolled coiling side guide plate opening adjustment device according to claim 3, characterized in that, The force-transmitting contact member (16) has a T-shaped structure, including a disc-shaped base (17) and a columnar guide portion (18) extending axially from the center of the base (17). One axial end face of the base (17) abuts against the pre-tension spring (11), and the columnar guide portion (18) is coaxially inserted into the inner cavity of the pre-tension spring (11). The other axial end face of the base (17) abuts against the built-in displacement sensor (12).

5. The hot-rolled coiling side guide plate opening adjustment device according to claim 4, characterized in that, The preload sleeve (10) is provided with an internal thread (19) on the inner wall of the opening of the driven rod (9). A preload nut (20) is rotatably provided on the driven rod (9). The threaded end of the preload nut (20) engages with the internal thread (19) and abuts against the preload spring (11). The initial preload force of the preload spring (11) is adjusted by rotating the preload nut (20).

6. The hot-rolled coiling side guide plate opening adjustment device according to claim 1, characterized in that, The sliding frame (2) has a long strip-shaped detection target plate (21) horizontally fixed on the side facing the laser rangefinder (13). The surface flatness of the detection target plate (21) is less than a preset value, and its length direction is parallel to the sliding direction of the sliding frame (2).

7. The hot-rolled coiling side guide plate opening adjustment device according to claim 6, characterized in that, The pre-tightening sleeve (10) is provided with a sealing ring (22) near the opening of the driven rod (9), and the sealing ring (22) is tightly fitted on the outer periphery of the drive rod (8).

8. The hot-rolled coiling side guide plate opening adjustment device according to claim 6, characterized in that, The base (1) is provided with a front limit switch (23) and a rear limit switch (24) at the front and rear limit positions of the sliding trajectory of the sliding frame (2), respectively. The front limit switch (23) and the rear limit switch (24) are both connected to the controller (14).

9. The hot-rolled coiling side guide plate opening adjustment device according to claim 1, characterized in that, The controller (14) is configured to acquire the relative displacement change rate, relative displacement holding amount and absolute displacement deviation value output by the built-in displacement sensor (12) and the laser rangefinder (13) within a continuous sampling period. When the relative displacement change rate is greater than the preset impact threshold, the controller (14) suppresses the opening compensation command formed based on the absolute displacement deviation value and outputs a position holding command or a reverse avoidance command to the servo motor (6), so that the drive rod (8) and the driven rod (9) form an elastic yield through the pre-tension spring (11); When the relative displacement change rate is less than or equal to the preset impact threshold, the relative displacement holding amount is continuously greater than the preset pre-tightening offset threshold, and the absolute displacement deviation value is greater than the preset opening deviation threshold, the controller (14) controls the servo motor (6) to drive forward or in reverse according to the direction of the absolute displacement deviation value, so as to adjust the opening of the side guide plate (5).

10. The hot-rolled coiling side guide plate opening adjustment device according to claim 9, characterized in that, The controller (14) is also configured to perform clearance self-calibration in a non-through-plate state: control the servo motor (6) to drive the lead screw transmission pair (7) to move slightly in a first direction, and record the first theoretical displacement corresponding to the actual absolute displacement change fed back by the laser range sensor (13) when it reaches a preset effective response threshold; then control the servo motor (6) to drive the lead screw transmission pair (7) to move slightly in a second direction opposite to the first direction, and record the second theoretical displacement corresponding to the actual absolute displacement change when it reaches the preset effective response threshold again; the controller (14) determines the invalid displacement interval between the first theoretical displacement and the second theoretical displacement as the reverse mechanical clearance of the lead screw transmission pair (7), and when the servo motor (6) reverses direction or sets the initial opening, adds the reverse mechanical clearance to the driving displacement in the corresponding direction.

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