Hot coiler bending roll assembly and roll gap control method thereof

Abstract

The present application belongs to the technical field of metallurgical hot rolling, and particularly relates to a hot coil box bending roller part and a roller gap regulation method thereof. By setting first, second and third displacement sensors, the real-time radial distance between the outer lateral wall of each bending roller and the corresponding displacement sensor is monitored in real time. By setting a data processing module, the monitoring data of the first, second and third displacement sensors is received and noise reduction processed. Subsequently, the actual roller diameter of each bending roller is calculated according to the real-time data after noise reduction and the initial roller diameter, and the actual roller diameter of each bending roller is also automatically judged as to whether it meets the production quality requirements to ensure that the bending roller that does not meet the requirements is replaced in time. Finally, the extension stroke of the extension end of the telescopic hydraulic cylinder is calculated, so that the production site can quickly complete the adjustment operation of the bending roller gap according to the data information and guidance of the data display module.

Description

Technical Field

[0001] This invention belongs to the field of metallurgical hot rolling technology, specifically relating to a hot coil box bending roll component and its roll gap control method. Background Technology

[0002] The hot coil box is a crucial piece of equipment connecting the roughing and finishing mills in the hot continuous rolling process. It temporarily stores the intermediate slab (90°C) after roughing into coils to minimize the temperature difference between the beginning and end of the slab. The bending roll assembly on the hot coil box is a key component for achieving the coiling of the intermediate slab. For example... Figure 1 As shown, the bending roller assembly currently includes an upper roller frame 1, an inlet upper bending roller 2, an outlet upper bending roller 3, a lower bending roller 4, and a telescopic hydraulic cylinder 9 mounted on the upper roller frame 1. The upper end of the hydraulic cylinder 9 is a fixed end, and the lower end is a telescopic end. The upper roller frame 1 is located on the upper side of the hot rolling box base, and its upper end is hinged to the hot rolling box base around a first axis parallel to the lower bending roller 4. The lower end of the upper roller frame 1 is hinged to the telescopic end of the telescopic hydraulic cylinder 9 around a second axis parallel to the lower bending roller 4. The inlet upper bending roller 2, the outlet upper bending roller 3, and the lower bending roller 4 are... All are parallel to the first axis. The inlet upper bending roller 2 and the outlet upper bending roller 3 are rotatably connected to the bottom of the upper roller frame 1 around their respective center lines, and the line connecting their center lines is parallel to the first axis. A guide plate 23 is also provided on the lower side of the upper roller frame 1 between the inlet upper bending roller 2 and the outlet upper bending roller 3. The lower bending roller 4 is arranged at intervals below the inlet upper bending roller 2, the outlet upper bending roller 3 and the guide plate 23, and is rotatably connected to the top of the hot coil box base around its own axis. The lower bending roller 4 is located between the inlet upper bending roller 2 and the outlet upper bending roller 3. The inlet upper bending roller 2, the outlet upper bending roller 3 and the lower bending roller 4 work together to apply pressure to the conveyed strip steel billet, bending it to form a steel coil. The inner diameter and coil shape of the steel coil are controlled by the roll gap between the upper bending roller and the lower bending roller 4. Therefore, the accuracy of the roll gap setting directly affects the quality of the steel coil and the smooth progress of the subsequent finishing rolling process. By adjusting the extension and retraction of the upper extension end of the hydraulic cylinder 9, the upper roller frame 1 can be driven to rotate around the first axis to achieve the setting of the roller gap between the inlet upper bending roller 2, the outlet upper bending roller 3 and the lower bending roller 4.

[0003] In actual use, the existing bending roll components experience gradual wear due to long-term high-load friction and extrusion between the bending rolls and the high-temperature intermediate billet 90, leading to a reduction in roll diameter. However, the roll gap value is typically calculated and set based on the theoretical roll diameter of the new rolls. As the rolls wear down, a deviation arises between the actual and theoretical roll diameters, and this deviation gradually increases over time. This results in insufficient control precision of the inner diameter of the steel coils on the hot rolling mill, leading to quality defects such as irregular coil shape, loose coils, and tapering. In severe cases, it can even affect the uncoiling operation of the hot rolling mill, causing production interruptions and production accidents such as steel piling and jamming. Previously, on-site personnel typically only stopped the machine to measure the roll diameter of each bending roll when quality problems were discovered, and then readjusted the roll gap setting based on the actual wear of the bending rolls. By this time, the steel coil quality problems had already occurred, affecting product quality and subsequent production processes. Furthermore, the bending rolls are located inside the frame of the hot rolling box, in a confined space with high ambient temperature, making manual measurement difficult, prone to errors, inefficient, and posing safety hazards such as burns. In addition, manual measurement requires machine shutdown, which not only reduces production efficiency but also limits the frequency of measurement, making it impossible to achieve continuous real-time monitoring of roller wear.

[0004] To minimize the impact on steel coil quality, the current on-site practice involves determining a fixed replacement cycle for the bending roll components based on experience, and then replacing the rolls uniformly upon reaching the designated replacement period. While this periodic replacement method can prevent excessive roll wear and ensure steel coil quality, the wear rate of rolls varies under different production conditions. Rolls wear faster when used frequently, in harsh working environments, or when processing hard materials, while they wear slower when used infrequently or when processing soft materials. A uniform replacement cycle cannot accommodate these differences, resulting in some rolls being replaced prematurely before reaching their service life, leading to resource waste. Meanwhile, other rolls may continue to be used beyond their reasonable service life, affecting steel coil quality and increasing the risk of equipment failure. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a bending roller component for a hot rolling box and a roller gap adjustment method thereof, which can safely and reliably realize the automatic measurement and detection of the bending roller diameter, improve the roller diameter measurement accuracy, save manpower, and improve the roller gap adjustment efficiency.

[0006] The technical solution adopted by the present invention to solve this technical problem is: a hot rolling box bending roller component, including a base, an upper roller frame, an inlet upper bending roller, an outlet upper bending roller, a lower bending roller, and a fixedly installed telescopic hydraulic cylinder; one end of the upper roller frame is hinged to the base around a first axis, and the other end of the upper roller frame is hinged to the telescopic end of the telescopic hydraulic cylinder around a second axis, and both the first axis and the second axis are parallel to the lower bending roller; the inlet upper bending roller and the outlet upper bending roller are rotatably connected to the bottom of the upper roller frame around their respective axes, and the lower bending roller is rotatably connected to the top of the base around its axis; It also includes a first displacement sensor for monitoring the radial distance between itself and the outer wall of the upper bending roller at the inlet, a second displacement sensor for monitoring the radial distance between the outer wall of the upper bending roller at the outlet, and a third displacement sensor for monitoring the radial distance between the outer wall of the lower bending roller; the first displacement sensor, the second displacement sensor, and the third displacement sensor are all non-contact displacement sensors; It also includes a data processing module electrically connected to the first displacement sensor, the second displacement sensor, and the third displacement sensor, respectively, and a data display module electrically connected to the data processing module; the data processing module is used to calculate and analyze the output signals of the first displacement sensor, the second displacement sensor, and the third displacement sensor and transmit the judgment result to the data display module for display.

[0007] Furthermore, the inlet bending roll includes an intermediate roll section with an axially equal diameter and end roll sections coaxially adjacent to each other at both ends of the intermediate roll section. The end roll sections are frustum-shaped structures with their outer diameters gradually increasing from the end furthest from the intermediate roll section to the end closest to the intermediate roll section. The outer diameter of the thicker end of the end roll section is equal to the outer diameter of the intermediate roll section. The intermediate roll section and the end roll sections are integrally formed. The axial length of the intermediate roll section is less than the width of the strip intermediate billet. The inlet upper bending roller, outlet upper bending roller, and lower bending roller all have the same structure and dimensions. The first displacement sensor is used to monitor its radial distance from the outer wall of the middle section of the upper curved roller at the inlet, the second displacement sensor is used to monitor its radial distance from the outer wall of the middle section of the upper curved roller at the outlet, and the third displacement sensor is used to monitor its radial distance from the outer wall of the middle section of the lower curved roller at the inlet.

[0008] Furthermore, the first displacement sensor, the second displacement sensor, and the third displacement sensor are all laser displacement sensors; During operation, the laser beam of the first displacement sensor is projected radially along the inlet upper bending roller onto the outer wall of the middle roller section of the inlet upper bending roller, the laser beam of the second displacement sensor is projected radially along the outlet upper bending roller onto the outer wall of the middle roller section of the outlet upper bending roller, and the laser beam of the third displacement sensor is projected radially along the lower bending roller onto the outer wall of the middle roller section of the lower bending roller.

[0009] Furthermore, the first displacement sensor, the second displacement sensor, and the third displacement sensor are fixedly mounted on the upper roller frame and are all located on the upper side of the inlet upper bending roller and the outlet upper bending roller. The upper roller frame is provided with a first through hole, a second through hole and a third through hole with parallel axes, and the third through hole is located between the first through hole and the second through hole; During operation, the laser beam from the first displacement sensor passes through the first through hole, the laser beam from the second displacement sensor passes through the second through hole, and the laser beam from the third displacement sensor passes through the third through hole.

[0010] Furthermore, the first displacement sensor, the second displacement sensor, and the third displacement sensor are each provided with at least three sets, and all are evenly distributed along the axial direction of the bending roller at the inlet.

[0011] Furthermore, the upper roller frame is provided with an upper drive motor for simultaneously driving the inlet upper bending roller and the outlet upper bending roller to rotate synchronously, and the base is provided with a lower drive motor for driving the lower bending roller to rotate. It also includes a controller, a first angular displacement sensor for monitoring the rotation angle of the inlet upper bending roller and the outlet upper bending roller, and a second angular displacement sensor for monitoring the rotation angle of the lower bending roller. The first displacement sensor, the second displacement sensor, the third displacement sensor, the data processing module, the first angular displacement sensor, the second angular displacement sensor, the upper drive motor, and the lower drive motor are all electrically connected to the controller.

[0012] Furthermore, the telescopic hydraulic cylinder is equipped with a displacement sensor for monitoring the telescopic distance of its free end and an electromagnetic directional valve for controlling the telescopic movement of the hydraulic cylinder. The displacement sensor and the electromagnetic directional valve are electrically connected to the controller.

[0013] A method for adjusting the roll gap of a hot roll box bending roller component, employing the hot roll box bending roller component with an angle displacement controller, includes the following steps: S1. Input the initial roll diameter d0 of the inlet upper bending roll, outlet upper bending roll, and lower bending roll, the initial radial distance measured by the first displacement sensor, the second displacement sensor, and the third displacement sensor, the preset roll change warning value J, the inner diameter D of the intermediate billet coil, and the thickness H of the intermediate billet plate into the data processing module; wherein the roll change warning value J is less than the initial roll diameter d0. The initial radial spacing was measured when the telescopic hydraulic cylinder pushed the upper roller frame downward to rotate relative to the base around the first rotating axis to the lower limit position and all the bent rollers were new rollers. S2. The telescopic hydraulic cylinder pushes the upper roller frame to rotate relative to the base around the first rotating shaft to the lower limit position; S3. Drive the inlet upper bending roller, outlet upper bending roller and lower bending roller to rotate synchronously around their respective axes at least one revolution. The first displacement sensor, the second displacement sensor and the third displacement sensor synchronously monitor the real-time radial distance of the outer wall of their respective bending shafts and transmit the measurement data to the data processing module in real time. The first angular displacement sensor synchronously monitors the rotation angle of the inlet upper bending roller and the outlet upper bending roller in real time. The second angular displacement sensor synchronously monitors the rotation angle of the lower bending roller in real time. When the first angular displacement sensor detects that the rotation angle of the upper bending roller reaches a positive integer multiple of 360°, the controller controls the inlet upper bending roller and the outlet upper bending roller to stop rotating; when the second angular displacement sensor detects that the rotation angle of the lower bending roller reaches a positive integer multiple of 360°, the controller controls the lower bending roller to stop rotating and shuts down the first displacement sensor, the second displacement sensor, the third displacement sensor, the first angular displacement sensor, and the second angular displacement sensor. S4. The data processing module calculates the average value of the dataset output in step S3 to obtain the actual radial spacing of each bending roller, and calculates the actual roller diameter of each bending roller. S5. Output the actual roller diameter corresponding to each bending roller to the data display module for display, and compare the actual roller diameter of each bending roller with the roller change warning value J; If there is an actual roll diameter that is less than or equal to the roll replacement warning value J, the replacement information of the corresponding curved roll is sent to the data display module for display. After the corresponding curved roll is replaced, proceed to step S6. If all actual roll diameters are greater than the roll change warning value J, proceed directly to step S6; S6. Calculate the extension and retraction stroke △LH of the roll gap RG to be set and the telescopic hydraulic cylinder and output it to the display module 7 for display. Adjust the extension and retraction stroke of the telescopic hydraulic cylinder according to the value of △LH. There is no restriction on the order of steps S1 and S2.

[0014] Furthermore, in step S1, the initial radial distance of the first displacement sensor is the initial radial distance L1 between the first displacement sensor and the outer wall of the inlet upper bending roller, the initial radial distance of the second displacement sensor is the initial radial distance L2 between the second displacement sensor and the outlet upper bending roller, and the initial radial distance of the third displacement sensor is the initial radial distance L3 between the third displacement sensor and the lower bending roller. In step S3, the actual radial distance between the first displacement sensor and the outer wall of the inlet upper bending roller is measured as L1′, the actual radial distance between the second displacement sensor and the outlet upper bending roller is measured as L2′, and the actual radial distance between the third displacement sensor and the lower bending roller is measured as L3′. The actual diameter of the bending roller at the inlet is d1, where d1 = d0 - 2 × (L1 - L1′); The actual diameter of the bending roller at the outlet is d2, where d2 = d0 - 2 × (L2 - L2′); The actual diameter of the lower bending roller is d3, where d3 = d0 - 2 × (L3 - L3′).

[0015] Furthermore, the data input to the data processing module in step S1 also includes: Loa: The distance between the axis of the first rotating shaft and the axis of the lower bending roller; Lob: The distance between the center line of the first rotating shaft and the center line of the upper bending roller at the exit; Loc: The distance from the center line of the first rotating shaft to the inlet upper bending roller; Lod: The distance between the first and second pivots; α: The angle between the line connecting the first shaft to the second shaft and the line connecting the first shaft to the center of the upper bending roller at the outlet; E1: The horizontal distance between the upper end of the telescopic hydraulic cylinder and the first rotating shaft; E2: The distance between the upper end of the telescopic hydraulic cylinder and the first rotating shaft in the vertical direction; LH min The axial length of the hydraulic telescopic rod 9 when the telescopic end of the telescopic hydraulic cylinder is at its upper limit position; In step S6, the axial displacement ΔLH of the telescopic hydraulic cylinder's telescopic end is calculated as follows: S6.1. Establish a Cartesian coordinate system XOY with the plane perpendicular to the lower bending roller as the coordinate plane, the projection of the first axis on the coordinate plane as the coordinate origin O, the axis parallel to the horizontal plane and perpendicular to the first axis as the X-axis, and the axis perpendicular to both the first axis and the X-axis as the Y-axis. S6.2. On the plane rectangular coordinate system XOY, confirm the projection center point C of the inlet upper bending roll, the projection center point B of the outlet upper bending roll, and the projection center point A of the lower bending roll, and preset the projection center point F of the intermediate billet coil on the coordinate system. When the bending roller is in operation, the coordinate origin O, the projection center point C and the projection center point B are collinear. The line connecting the midpoint G of line segment BC and the projection center point A is perpendicular to line segment BC. The midpoint G, the projection center point A and point F are collinear. S6.3 Calculate the required roll gap for the bending roll:

[0016]

[0017]

[0018]

[0019] Lbf: Center distance between the intermediate billet coil and the bending roll at the exit; Lbg: Half the center distance between the inlet upper bending roller and the outlet upper bending roller; Lfg: The distance between the center line connecting the inlet upper bending roll and the outlet upper bending roll and the center line of the intermediate billet coil; Lof: The distance between the first axis and the center line of the intermediate billet coil; Log: Distance between the first axis and the midpoint of the line connecting the center points of the inlet upper bending roller and the outlet upper bending roller;

[0020]

[0021]

[0022]

[0023]

[0024]

[0025]

[0026]

[0027] The angle between line segment OF and line segment OB; Laf: Center distance between the lower bending roll and the intermediate billet coil; The angle between line segment OA and line segment OF; The angle between line segment OA and the X-axis; The angle between line segment OA and line segment OB; The angle between line segment OB and the X-axis; Lab: Center distance between the upper and lower bending rollers at the outlet; RG: Roll gap between the upper and lower bending rolls at the exit; S6.4 Calculate the required axial length of the telescopic hydraulic cylinder and the stroke of the telescopic end of the cylinder. :

[0028]

[0029]

[0030]

[0031] D1: X-axis coordinate of the telescopic hydraulic cylinder extension end when the gap between the upper and lower bending rollers at the outlet is RG; D2: The Y-coordinate of the telescopic hydraulic cylinder extension end when the gap between the upper and lower bending rollers at the outlet is RG; E1: X-axis coordinate of the fixed end of the telescopic hydraulic cylinder; E2: Y-coordinate of the fixed end of the telescopic hydraulic cylinder; LH: The total axial length of the telescopic hydraulic cylinder when the roll gap between the upper and lower bending rollers at the outlet is RG; The stroke of the telescopic hydraulic cylinder at its telescopic end.

[0032] Compared with the prior art, the beneficial effects of the present invention are: it provides a hot-rolling box bending roll component and its roll gap control method, by setting a first displacement sensor, a second displacement sensor and a third displacement sensor to monitor the real-time radial distance between the outer wall of each bending roll and its corresponding displacement sensor, by setting a data processing module to receive the monitoring data of the first displacement sensor, the second displacement sensor and the third displacement sensor and perform noise reduction processing, and then calculate the actual roll diameter of each bending roll based on the noise-reduced real-time data and the initial roll diameter, and set the actual roll diameter of each bending roll. At the same time, the data processing module compares the actual roll diameter with the preset roll replacement warning value to determine whether there is a bending roll to be replaced. If there is a bending roll to be replaced, roll replacement information is output. After the corresponding bending roll is replaced, the stroke of the telescopic hydraulic cylinder is calculated and output based on the actual roll diameter of each bending roll, the inner diameter of the intermediate billet steel coil and the plate thickness; if there is no bending roll to be replaced, the stroke of the telescopic hydraulic cylinder is directly calculated and output based on the actual roll diameter of each bending roll. A data display module electrically connected to the data processing module displays information such as the actual roll diameter of each bending roll, roll replacement information, and the stroke of the telescopic end of the telescopic hydraulic cylinder. This information allows for quick and accurate replacement of the corresponding bending roll and adjustment of the roll gap on-site. The hot-rolling box bending roll component of this invention automatically, quickly, accurately, and safely measures the actual roll diameter of multiple bending rolls, saving manpower, improving roll diameter measurement efficiency, and ensuring the quality of steel coil production. Furthermore, this invention automatically judges whether the actual roll diameter of the bending roll meets production quality requirements to ensure timely replacement of non-compliant bending rolls. Finally, it calculates the telescopic stroke of the telescopic end of the hydraulic cylinder, allowing the production site to quickly and efficiently adjust the roll gap based on the data displayed by the data display module, saving manpower and ensuring the quality of steel coil production. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the structure before the improvement described in the background section; Figure 2 This is a schematic diagram of the structure of the present invention; Figure 3 This is a schematic diagram of the structure of the inlet upper bending roller, the outlet upper bending roller, and the lower bending roller in this invention; Figure 4 This is a schematic diagram of the layout structure of the inlet bending roller and its corresponding multiple laser position sensors in this invention; Figure 5 This is a schematic diagram showing the connection relationship of the sensor, controller and other components in this invention; Figure 6 This is a schematic diagram illustrating the principle and structure of the roll gap calculation and control of the present invention; Figure 7 yesFigure 6 Enlarged schematic diagram of the lower part; Reference numerals: 1-Upper roller frame; 11-Limit block; 2-Inlet upper bending roller; 21-Intermediate roller section; 22-End roller section; 23-Guide plate; 3-Outlet upper bending roller; 4-Lower bending roller; 51-First displacement sensor; 52-Second displacement sensor; 53-Third displacement sensor; 6-Data processing module; 7-Data display module; 81-First angle displacement sensor; 82-Second angle displacement sensor; 9-Telescopic hydraulic cylinder; 90-Intermediate blank; 91-Position sensor; 92-Solenoid directional valve; 93-Upper drive motor; 94-Lower drive motor; 99-Controller. Detailed Implementation

[0034] The present invention will be further described below with reference to the accompanying drawings and embodiments. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0035] As attached Figures 1-7 As shown, a hot roll box bending roller assembly includes a base, an upper roller frame 1, an inlet upper bending roller 2, an outlet upper bending roller 3, a lower bending roller 4, and a fixedly mounted telescopic hydraulic cylinder 9. One end of the upper roller frame 1 is hinged to the base around a first axis, and the other end of the upper roller frame 1 is hinged to the telescopic end of the telescopic hydraulic cylinder 9 around a second axis. Both the first axis and the second axis are parallel to the lower bending roller 4. The inlet upper bending roller 2 and the outlet upper bending roller 3 are rotatably connected to the bottom of the upper roller frame 1 around their respective axes, and the lower bending roller 4 is rotatably connected to the top of the base around its axis. The assembly also includes a first displacement sensor 51 for monitoring the radial distance between the roller 4 and the outer wall of the inlet upper bending roller 2, and a sensor 51 for monitoring the radial distance between the outlet upper bending roller 4 and the outer wall of the inlet upper bending roller 2. The system includes a second displacement sensor 52 for monitoring the radial distance of the outer wall of the upper bending roll 3 and a third displacement sensor 53 for monitoring the radial distance of the outer wall of the lower bending roll 4. All three sensors (51, 52, and 53) are non-contact displacement sensors. The system also includes a data processing module 6 electrically connected to each sensor and a data display module 7 electrically connected to the data processing module 6. The data processing module 6 calculates and analyzes the output signals of the sensors and transmits the results to the data display module 7 for display. The radial distance refers to the minimum distance between the displacement sensor and the outer wall of the bending roll being tested in the radial direction. The non-contact displacement sensors 51, 52, and 53 are spaced apart from the bending rolls to adapt to the high-temperature and harsh environment of the steel billet in the middle of the roll gap at the hot-rolling box.

[0036] Before measuring the bending rolls, the initial roll diameters of the inlet upper bending roll 2, the outlet upper bending roll 3, and the lower bending roll 4, as well as the initial radial distance between each displacement sensor and the outer wall of the corresponding monitored bending roll, should be input into the data processing module 6. The roll change warning value J, the inner diameter of the intermediate billet coil, and the plate thickness should also be set. In actual production, the initial roll diameters of the inlet upper bending roll 2, the outlet upper bending roll 3, and the lower bending roll 4 are the same. When measuring the diameter of the bending roller, the upper roller frame 1 remains in a fixed position relative to the lower bending roller 4, driving the inlet upper bending roller 2, outlet upper bending roller 3, and lower bending roller 4 to rotate synchronously. The first displacement sensor 51 monitors its radial distance from the outer wall of the inlet upper bending roller 2 in real time, the second displacement sensor 52 monitors its radial distance from the outer wall of the outlet upper bending roller 3 in real time, and the third displacement sensor 53 continuously monitors the radial distance from the outer wall of the lower bending roller 4 in real time. The first displacement sensor 51, the second displacement sensor 52, and the third displacement sensor 53 transmit multiple sets of real-time radial distance data they monitor to the data processing module 6. The data processing module 6 performs noise reduction processing on the multiple sets of data collected by the first displacement sensor 51, the second displacement sensor 52, and the third displacement sensor 53, and then... The difference between the noise-reduced data and the initial radial distance of the corresponding roller diameter is calculated. Based on the difference and the initial roller diameter, the actual roller diameter is calculated and then the actual roller diameters of the inlet upper bending roller 2, the outlet upper bending roller 3, and the lower bending roller 4 are sent to the data display module 7 for display. Subsequently, the actual roller diameter of each bending roller is compared with the roller replacement warning value J. If there is an actual roller diameter smaller than the roller replacement warning value J, the information of the corresponding bending roller smaller than the roller replacement warning value J is simultaneously sent to the data display module 7 for display, prompting maintenance personnel to replace the corresponding bending roller. After the corresponding bending roller is replaced, the stroke ΔLH of the upper extension end of the telescopic hydraulic cylinder 9 is calculated based on the actual roller diameter of each bending roller, the inner diameter of the intermediate billet steel coil, and the plate thickness, and the axial displacement ΔLH is sent to the data display module 7 for display. If there is no actual roll diameter less than the roll change warning value J, the stroke △LH of the telescopic hydraulic cylinder 9 is directly calculated based on the actual roll diameter of each bending roll, the inner diameter of the intermediate billet coil, and the plate thickness. The axial displacement △LH is then transmitted to the data display module 7 for display, so that on-site personnel can quickly and accurately adjust the roll gap of the bending roll.

[0037] This hot-rolling box bending roll component, employing this structure, automatically and quickly measures the actual roll diameter of multiple bending rolls, replacing manual labor. This saves manpower, improves roll diameter measurement accuracy and efficiency, enhances the safety of roll diameter and roll gap monitoring operations in the hot-rolling box, and ensures steel coil quality. Furthermore, this invention can analyze the bending roll diameter in real time and provide prompts for replacing the corresponding bending roll or adjusting the axial displacement of the telescopic hydraulic cylinder's extension end. This allows the production line to quickly replace the corresponding bending roll and adjust the roll gap based on data from the display module.

[0038] The base is used to integrate and assemble the bending roller components of the hot rolling box. The upper roller frame 1 is used to install the inlet upper bending roller 2 and the outlet upper bending roller 3. By adjusting the angle and position of the upper roller frame 1 relative to the top surface of the base, the roller gap between the upper bending roller on the upper roller frame 1 and the lower bending roller 4 on the base can be adjusted. The telescopic hydraulic cylinder 9 is used to drive the upper roller frame 1 to rotate relative to the base around the first axis to achieve the roller gap adjustment between the upper bending roller and the lower bending roller 4.

[0039] The inlet upper bending roll 2, the outlet upper bending roll 3, and the lower bending roll 4 are all cylindrical roll structures with equal axial diameter. When the hot rolling box is working, since the width of the strip intermediate billet 90 is usually less than the total length of the roll body, the contact between its two ends and the roll surface is mainly concentrated in the middle area of ​​the roll body. This causes the middle area of ​​the traditional bending roll to wear much faster than the two ends, resulting in uneven wear, which in turn affects the roll gap accuracy and roll shape quality. Preferably, the inlet upper bending roller 2 includes an intermediate roller section 21 with an axially equal diameter and end roller sections 22 coaxially adjacent to both ends of the intermediate roller section 21. The end roller sections 22 are frustum structures with their outer diameters gradually increasing from the end away from the intermediate roller section 21 to the end closer to the intermediate roller section 21. The outer diameter of the thicker end of the end roller section 22 is equal to the outer diameter of the intermediate roller section 21. The intermediate roller section 21 and the end roller sections 22 are integrally formed. The axial length of the intermediate roller section 21 is less than the width of the strip intermediate billet 90. The inlet upper bending roller 2, the outlet upper bending roller 3, and the lower bending roller 4 have the same structure and dimensions. The first displacement sensor 51 is used to monitor its radial distance from the outer wall of the intermediate roller section 21 of the inlet upper bending roller 2. The second displacement sensor 52 is used to monitor its radial distance from the outer wall of the intermediate roller section 21 of the outlet upper bending roller 3. The third displacement sensor 53 is used to monitor its radial distance from the outer wall of the intermediate roller section 21 of the inlet lower bending roller 4. The axial length of the intermediate roll section 21 is required to be less than or equal to the minimum width of the intermediate strip billet 90 it processes. This ensures that the area where the strip actually contacts and wears is always concentrated in the cylindrical section, avoiding uneven and unpredictable wear in the cylindrical section caused by changes in the width of the produced strip. This also ensures that the two ends of the strip in the width direction never contact the side wall of the end roll section 22, reducing wear on the end roll section. When the intermediate roll section 21 wears, the bending roll as a whole can still maintain stable support and guidance.

[0040] The first displacement sensor 51, the second displacement sensor 52, and the third displacement sensor 53 can be non-contact, high-temperature resistant displacement sensors such as laser displacement sensors or capacitive displacement sensors. Considering the generally high levels of dust and oil in steel plate production environments, preferably, the first displacement sensor 51, the second displacement sensor 52, and the third displacement sensor 53 are all laser displacement sensors. During operation, the laser beam of the first displacement sensor 51 is projected radially along the inlet upper bending roller 2 onto the outer wall of the middle roller section 21 of the inlet upper bending roller 2; the laser beam of the second displacement sensor 52 is projected radially along the outlet upper bending roller 3 onto the outer wall of the middle roller section 21 of the outlet upper bending roller 3; and the laser beam of the third displacement sensor 53 is projected radially along the middle roller section 21 of the lower bending roller 4 onto the outer wall of the lower bending roller 4. Laser displacement sensors not only offer high accuracy but also, compared to other non-contact displacement sensors, exhibit more stable measurement capabilities and high-speed dynamic response characteristics in harsh production environments such as high temperature, strong light, and electromagnetic interference. As a further preferred embodiment, the first displacement sensor 51, the second displacement sensor 52, and the third displacement sensor 53 are all laser displacement sensors with cooling devices, such as the Julight high-precision laser displacement sensor, in which a custom liquid cooling system can be configured to operate in vacuum, high pressure, and 1000°C environments.

[0041] The first displacement sensor 51, the second displacement sensor 52, and the third displacement sensor 53 can be mounted on the upper roller frame 1, or on the base or the upper roller frame 1. Specifically, the first displacement sensor 51, the second displacement sensor 52, and the third displacement sensor 53 are fixedly mounted on the upper roller frame 1 and are all located above the inlet upper bending roller 2 and the outlet upper bending roller 3. The upper roller frame 1 has a first through hole, a second through hole, and a third through hole with parallel axes. The third through hole is located between the first through hole and the second through hole. During operation, the laser beam of the first displacement sensor 51 passes through the first through hole, the laser beam of the second displacement sensor 52 passes through the second through hole, and the laser beam of the third displacement sensor 53 passes through the third through hole. Generally, a guide plate 23 is provided between the inlet upper bending roller 2 and the outlet upper bending roller 3 on the upper roller frame 1, and the third through hole should pass through the guide plate 23 to ensure that the laser beam passes through.

[0042] The first displacement sensor 51, the second displacement sensor 52, and the third displacement sensor 53 can each be provided as one or more. Preferably, the first displacement sensor 51, the second displacement sensor 52, and the third displacement sensor 53 are each provided in at least three sets and are all evenly distributed along the axial direction of the bending roller 2 at the inlet. Providing multiple displacement sensors for each bending roller enables monitoring of the roller diameter at different sections along the axial direction of a single bending roller, improving the monitoring accuracy and reliability of the real-time roller diameter and real-time roller gap of the bending roller. Generally, three of each of the first displacement sensor 51, the second displacement sensor 52, and the third displacement sensor 53 are sufficient. When the data processing module 6 processes the data from the three displacement sensors that simultaneously monitor the absolute distance of the outer wall of the same bending roller, it should perform a weighted average of the data from the three measurement points, that is, the absolute distance of the outer wall of the bending roller = the diameter of the roller at the middle position + the sum of the diameters of the rollers at the two outer positions / 2 / 2.

[0043] Preferably, the upper roller frame 1 is equipped with an upper drive motor 93 for simultaneously driving the inlet upper bending roller 2 and the outlet upper bending roller 3 to rotate synchronously, and the base is equipped with a lower drive motor 94 for driving the lower bending roller 4 to rotate; it also includes a controller 99, a first angle displacement sensor 51 for monitoring the rotation angle of the inlet upper bending roller 2 and the outlet upper bending roller 3, and a second angle displacement sensor 82 for monitoring the rotation angle of the lower bending roller 4. The first displacement sensor 51, the second displacement sensor 52, the third displacement sensor 53, the data processing module 6, the first angle displacement sensor 81, the second angle displacement sensor 82, the upper drive motor 93, and the lower drive motor 94 are respectively electrically connected to the controller 99. The output shaft of the upper drive motor 93 is drivenly connected to the input shaft of the upper reducer, and the output shaft of the upper reducer drives the inlet upper bending roller 2 and the outlet upper bending roller 3 to rotate synchronously through a chain drive structure; the output shaft of the lower drive motor 94 is drivenly connected to the input shaft of the lower reducer, and the output shaft of the lower reducer drives the lower bending roller 4 to rotate through a chain drive or other transmission methods. To ensure the accuracy of bending roll diameter measurement, the rotation angle of the individual bending roll being measured is generally required to be an integer multiple of 360°. During the measurement process, the upper drive motor drives the inlet upper bending roll 2 and the outlet upper bending roll 3 to rotate synchronously, while the lower drive motor 94 drives the lower bending roll 4 to rotate. The first displacement sensor 51, the second displacement sensor 52, and the third displacement sensor 53 monitor the radial distance of their respective outer walls of the bending rolls in real time. The first angular displacement sensor 81 and the second angular displacement sensor 82 monitor the real-time rotation angle of the upper and lower bending rolls and transmit the monitored data back to the controller 99 in real time. Generally, when the rotation angle of the upper bending roll is 360°, the controller 99 controls the upper drive motor 93 to stop rotating and controls the first displacement sensor 51 and the second displacement sensor 52 to stop the measurement operation; when the rotation angle of the lower bending roll 4 is 360°, the controller 99 controls the lower drive motor 94 to stop rotating, causing the bending roll to stop rotating and controlling the third displacement sensor 53 to stop the measurement operation, so as to ensure that the outer diameter of each bending roll calculated by the data processing module 6 is more accurate. The first angular displacement sensor 81 and the second angular displacement sensor 82 can be photoelectric angular displacement sensors, capacitive angular displacement sensors, etc. Preferably, both the first angular displacement sensor 81 and the second angular displacement sensor 82 are encoders, which have higher accuracy and resolution, faster response and stronger anti-interference ability compared with other angular displacement sensors.

[0044] Preferably, the hydraulic telescopic cylinder 9 is equipped with a position sensor 91 for monitoring the telescopic distance of its free end and an electromagnetic directional valve 92 for controlling the telescopic movement of the hydraulic cylinder 9. The position sensor 91 and the electromagnetic directional valve 92 are electrically connected to the controller 99. When the data processing module 6 calculates the stroke ΔLH of the telescopic end of the hydraulic cylinder 9 and outputs the data to the data display module 7 and the controller 99, the controller 99 controls the electromagnetic directional valve 92 on the hydraulic cylinder 9 to switch to the extended or retracted position to adjust the position of the telescopic rod on the hydraulic cylinder. When the electromagnetic directional valve 92 detects that the telescopic end of the hydraulic cylinder 9 has reached the designated position, the controller 99 controls the electromagnetic directional valve 92 on the hydraulic cylinder 9 to reset to the stop position. During this process, the upper roller frame 1 will rotate relative to the base around the first rotating shaft under the push of the telescopic cylinder 9, thereby driving the upper bending roller to move relative to the lower bending roller 4 to achieve automatic adjustment of the roller gap between the upper and lower bending rollers, saving manpower.

[0045] The data processing module 6 is mainly used to analyze and calculate the data collected by various displacement sensors after noise reduction processing. The controller 99 is mainly used to adjust the axial position of the telescopic end of the telescopic hydraulic rod 9 according to the analysis and calculation results of the data processing module 6, thereby realizing the automatic control of the upper and lower bending roller gap. Both the data processing module 6 and the controller 99 can be one of a microprocessor, a programmable logic controller, an industrial computer, or an embedded controller. Preferably, the data processing module 6 and the controller 99 are the same controller, which has a simple structure and is easy to deploy.

[0046] A method for adjusting the roll gap of a hot roll box bending roller assembly, employing the hot roll box bending roller assembly having a first angular displacement sensor 81 and a second angular displacement sensor 82, includes the following steps: S1. Input the initial roll diameter d0 of the inlet upper bending roll 2, the outlet upper bending roll 3 and the lower bending roll 4, the initial radial distance measured by the first displacement sensor 51, the second displacement sensor 52 and the third displacement sensor 53, the preset roll change warning value J, the inner diameter D of the intermediate billet coil and the thickness H of the intermediate billet plate into the data processing module 6; wherein the roll change warning value J is less than the initial roll diameter d0. The initial radial spacing was measured when the telescopic hydraulic cylinder 9 pushed the upper roller frame 1 downward to rotate relative to the base around the first rotating axis to the lower limit position and all the bent rollers were new rollers. S2. The telescopic hydraulic cylinder 9 pushes the upper roller frame 1 to rotate relative to the base around the first rotating shaft to the lower limit position; S3. Drive the upper bending roller 2 at the inlet, the upper bending roller 3 at the outlet, and the lower bending roller 4 to rotate synchronously around their respective axes at least once, that is, to drive at least 360°. The first displacement sensor 51, the second displacement sensor 52, and the third displacement sensor 53 synchronously monitor the real-time radial distance of the outer wall of their respective bending shafts and transmit the measurement data to the data processing module 6 in real time. The first angular displacement sensor 81 synchronously monitors the rotation angle of the upper bending roller 2 at the inlet and the upper bending roller 3 at the outlet in real time, and the second angular displacement sensor 82 synchronously monitors the rotation angle of the lower bending roller 4 in real time. When the first angle displacement sensor 81 detects that the rotation angle of the upper bending roller reaches a positive integer multiple of 360°, the controller 99 controls the inlet upper bending roller 2 and the outlet upper bending roller 3 to stop rotating; when the second angle displacement sensor 82 detects that the rotation angle of the lower bending roller 4 reaches a positive integer multiple of 360°, the controller 99 controls the lower bending roller 4 to stop rotating and shuts down the first displacement sensor 51, the second displacement sensor 52, the third displacement sensor 53, and the first angle displacement sensor 81 and the second angle displacement sensor 82. S4. The data processing module 6 calculates the average value of the dataset output in step S3 to obtain the actual radial distance of each bending roller, and calculates the actual roller diameter of each bending roller. S5. Output the actual roller diameter corresponding to each bending roller to the data display module 7 for display, and compare the actual roller diameter of each bending roller with the roller change warning value J; If there is an actual roll diameter that is less than or equal to the roll replacement warning value J, the replacement information of the corresponding curved roll is sent to the data display module 7 for display. After the corresponding curved roll is replaced, proceed to step S6. If all actual roll diameters are greater than the roll change warning value J, proceed directly to step S6; S6. Calculate the extension and retraction stroke △LH of the roll gap RG to be set and the telescopic hydraulic cylinder 9 and output it to the display module 7 for display. Adjust the extension and retraction stroke of the telescopic hydraulic cylinder 9 according to the value of △LH. There is no restriction on the order of steps S1 and S2. They can be implemented simultaneously, sequentially, or step S2 can be implemented first and then step S1.

[0047] The hot-rolling box bending roll gap adjustment method of this invention not only automatically, quickly, accurately, and safely measures the actual roll diameter of each bending roll, but also automatically judges whether the actual roll diameter of the bending roll meets the production quality requirements to ensure that bending rolls that do not meet the requirements are replaced in a timely manner. Finally, it calculates the extension stroke of the extension end of the telescopic hydraulic cylinder 9, so that the production site can quickly complete the axial displacement of the extension end of the telescopic hydraulic cylinder based on the data information from the data display module, thereby efficiently completing the bending roll gap adjustment operation, saving manpower, and ensuring the quality of steel coil production. The measurement frequency can be set according to the needs of the production site, such as measuring the roll diameter of the bending roll every two weeks or every five days to ensure effective monitoring.

[0048] The main function of step S1 is to provide basic data for automatically measuring and calculating the actual diameter of the bending roller, determining whether the bending roller diameter meets production requirements, and calculating the stroke of the telescopic hydraulic cylinder 9. In step S1, the initial roller diameter of each bending roller is the diameter of a new roller, and the new roller diameters of the inlet upper bending roller 2, the outlet upper bending roller 3, and the lower bending roller 4 are the same. The preset roller replacement warning value J mentioned in step S1 is used as a benchmark to evaluate whether the actual roller diameter meets production requirements. That is, when the actual roller diameter is below the preset roller replacement warning value J, the bending roller needs to be replaced; otherwise, it does not need to be replaced.

[0049] Step S2 is used to ensure that the monitoring benchmark for the radial distance of the outer side wall of each bending roller is the same as the initial benchmark. The bottom of the upper roller frame 1 in step S2 is provided with a limiting block 11. When the upper roller frame 1 moves around the first rotating axis to the lower limit position, the limiting block 11 abuts against the top surface of the base to achieve the limiting. By setting the limiting block 11, the rapid rotation limit of the upper roller frame 1 is achieved, ensuring the accuracy of the upper roller frame 1 moving to the lower limit position.

[0050] In step S3, each bending roller rotates at least 360° to ensure that the circumference of the bending roller can be analyzed based on the monitoring data, and the roller diameter measurement value can be obtained more accurately. Generally, in order to save measurement time and improve measurement efficiency, when the first angular displacement sensor 81 detects that the rotation angle reaches 360°, the controller 99 controls the upper bending roller 2 at the inlet and the upper bending roller 3 at the outlet to stop rotating, and shuts down the first displacement sensor 51, the second displacement sensor 52 and the first angular displacement sensor 81; when the second angular displacement sensor 82 detects that the rotation angle reaches 360°, the controller 99 controls the lower bending roller 4 to stop rotating and shuts down the third displacement sensor 53 and the second angular displacement sensor 82.

[0051] Step S4 is used to calculate the actual diameter of the bending roller. Specifically, in step S1, the initial radial distance of the first displacement sensor 51 is the initial radial distance L1 between the first displacement sensor 51 and the outer wall of the inlet upper bending roller 2; the initial radial distance of the second displacement sensor 52 is the initial radial distance L2 between the second displacement sensor 52 and the outlet upper bending roller 3; and the initial radial distance of the third displacement sensor 53 is the initial radial distance L3 between the third displacement sensor 53 and the lower bending roller 4. In step S3, the actual radial distance measured between the first displacement sensor 51 and the outer wall of the inlet upper bending roller 2 is L1′; the actual radial distance monitored by the second displacement sensor 52 and the outlet upper bending roller 3 is L2′; and the actual radial distance monitored by the third displacement sensor 53 and the lower bending roller 4 is L3′. The actual diameter of the inlet bending roller 2 is d1, where d1 = d0 - 2 × (L1 - L1′); The actual diameter of the bending roller 3 at the outlet is d2, where d2 = d0 - 2 × (L2 - L2′); The actual diameter of the lower bending roller 4 is d3, where d3 = d0 - 2 × (L3 - L3′).

[0052] To ensure the accuracy of the actual roller diameter obtained in step S4, preferably, before implementing step S4, the dataset received by the data processing module 6 undergoes noise reduction processing to remove outliers from the datasets collected by the first displacement sensor 51, the second displacement sensor 52, and the third displacement sensor 53. Generally, a filtering algorithm is first used to remove outliers and noise from the datasets collected by the first displacement sensor 51, the second displacement sensor 52, and the third displacement sensor 53, respectively. Then, a dynamic compensation algorithm is used to combine the real-time angle information from the first angle displacement sensor 81 and the second angle displacement sensor 82 to map the real-time data onto the circumferential angle of the roller.

[0053] Step S5 is mainly used for comparative analysis to determine if any bending rolls need to be replaced. Preferably, the data input to the data processing module 6 in step S1 also includes a preset bending roll roundness deviation Z; step S5 also includes comparing the roundness deviation of the data in the same bending roll dataset. If the roundness deviation is greater than the roundness warning deviation Z or there is an actual roll diameter below the roll replacement warning value J, the replacement information of the corresponding bending roll is sent to the data display module 7 for display. Step S7 can only be performed after the corresponding bending roll is replaced. This allows for a more comprehensive and accurate detection of bending roll abnormalities, ensuring the quality of intermediate billet production.

[0054] Step S6 is used to calculate the required roll gap size and the extension / retraction stroke of the telescopic hydraulic cylinder 9 to achieve the required roll gap size, and adjust the telescopic hydraulic cylinder 9 accordingly. Figure 6 As shown, specifically, the data input to the data processing module 6 in step S1 also includes: Loa: The distance between the axis of the first rotating shaft and the axis of the lower bending roller 4; Lob: The distance between the center line of the first rotating shaft and the center line of the upper bending roller 3 at the outlet; Loc: The distance between the first rotating shaft and the center line of the inlet upper bending roller 2; Lod: The distance between the first and second pivots; α: The angle between the line connecting the first shaft to the second shaft and the line connecting the first shaft to the center of the upper bending roller at the outlet; E1: The horizontal distance between the upper end of the telescopic hydraulic cylinder 9 and the first rotating shaft; E2: The distance between the upper end of the telescopic hydraulic cylinder 9 and the first rotating shaft in the vertical direction; LH min : The axial length of the hydraulic telescopic rod 9 when the telescopic end of the telescopic hydraulic cylinder 9 is at the upper limit position; In step S7, the axial displacement ΔLH of the telescopic hydraulic cylinder 9 at the telescopic end is calculated as follows: S7.1. Establish a Cartesian coordinate system XOY with the plane perpendicular to the lower bending roller 4 as the coordinate plane, the projection of the first axis on the coordinate plane as the coordinate origin O, the axis parallel to the horizontal plane and perpendicular to the first axis as the X-axis, and the axis perpendicular to both the first axis and the X-axis as the Y-axis. S7.2. On the plane rectangular coordinate system XOY, confirm the projection center point C of the inlet upper bending roller 2, the projection center point B of the outlet upper bending roller, and the projection center point A of the lower bending roller 4, and preset the projection center point F of the intermediate billet steel coil on the coordinate system. When the bending roller is in operation, the coordinate origin O, the projection center point C and the projection center point B are collinear. The line connecting the midpoint G of line segment BC and the projection center point A is perpendicular to line segment BC. The midpoint G, the projection center point A and point F are collinear. S7.3 Calculate the required roll gap for the bending roll:

[0055]

[0056]

[0057]

[0058] Lbf: Center distance between the intermediate billet coil and the bending roll 3 at the exit; Lbg: Half the center distance between the inlet upper bending roller 2 and the outlet upper bending roller 3; Lfg: The distance between the center line connecting the inlet upper bending roll 2 and the outlet upper bending roll 3 and the center line of the intermediate billet coil; Lof: The distance between the first axis and the center line of the intermediate billet coil; Log: Distance between the first axis and the midpoint of the line connecting the center points of the inlet upper bending roller 2 and the outlet upper bending roller 3;

[0059]

[0060]

[0061]

[0062]

[0063]

[0064]

[0065]

[0066] The angle between line segment OF and line segment OB; Laf: Center distance between the lower bending roll 4 and the intermediate billet coil; The angle between line segment OA and line segment OF; The angle between line segment OA and the X-axis; The angle between line segment OA and line segment OB; The angle between line segment OB and the X-axis; Lab: Center distance between the upper bending roller 3 and the lower bending roller 4 at the outlet; RG: The gap between the upper bending roll 3 and the lower bending roll 4 at the outlet; S7.4 Calculate the required axial length of the telescopic hydraulic cylinder 9 and the stroke of the telescopic end of the telescopic hydraulic cylinder 9. :

[0067]

[0068]

[0069]

[0070] D1: X-axis coordinate of the telescopic hydraulic cylinder 9 at the roll gap between the upper bending roller 3 and the lower bending roller 4 at the outlet, when the gap is RG; D2: The Y-axis coordinate of the telescopic end of the telescopic hydraulic cylinder 9 when the roll gap between the upper bending roller 3 and the lower bending roller 4 at the outlet is RG; E1: X-axis coordinate of the fixed end of the telescopic hydraulic cylinder 9; E2: Y-coordinate of the fixed end of the telescopic hydraulic cylinder 9; LH: The total axial length of the telescopic hydraulic cylinder 9 when the roll gap between the upper bending roller 3 and the lower bending roller 4 at the outlet is RG; : The stroke of the telescopic hydraulic cylinder 9 at its telescopic end.

[0071] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A hot roll box bending roller assembly, comprising a base, an upper roller frame (1), an inlet upper bending roller (2), an outlet upper bending roller (3), a lower bending roller (4), and a fixedly mounted telescopic hydraulic cylinder (9); one end of the upper roller frame (1) is hinged to the base around a first axis, and the other end of the upper roller frame (1) is hinged to the telescopic end of the telescopic hydraulic cylinder (9) around a second axis, wherein both the first axis and the second axis are parallel to the lower bending roller (4); the inlet upper bending roller (2) and the outlet upper bending roller (3) are rotatably connected to the bottom of the upper roller frame (1) around their respective axes, and the lower bending roller (4) is rotatably connected to the top of the base around its axis; characterized in that: It also includes a first displacement sensor (51) for monitoring the radial distance between itself and the outer wall of the upper curved roller (2) at the inlet, a second displacement sensor (52) for monitoring the radial distance between the outer wall of the upper curved roller (3) at the outlet, and a third displacement sensor (53) for monitoring the radial distance between the outer wall of the lower curved roller (4); the first displacement sensor (51), the second displacement sensor (52) and the third displacement sensor (53) are all non-contact displacement sensors; It also includes a data processing module (6) electrically connected to the first displacement sensor (51), the second displacement sensor (52) and the third displacement sensor (53) respectively, and a data display module (7) electrically connected to the data processing module (6); the data processing module (6) is used to calculate and analyze the output signals of the first displacement sensor (51), the second displacement sensor (52) and the third displacement sensor (53) and transmit the judgment result to the data display module (7) for display.

2. The hot roll box bending roller component according to claim 1, characterized in that: The inlet bending roll (2) includes an intermediate roll section (21) with equal axial diameter and end roll sections (22) coaxially adjacent to each other at both ends of the intermediate roll section (21). The end roll section (22) is a frustum structure with an outer diameter that gradually increases from the end away from the intermediate roll section (21) to the end closer to the intermediate roll section (21). The outer diameter of the thick end of the end roll section (22) is equal to the outer diameter of the intermediate roll section (21). The intermediate roll section (21) and the end roll section (22) are integrally formed. The axial length of the intermediate roll section (21) is less than the width of the strip intermediate billet. The inlet upper bending roller (2), outlet upper bending roller (3) and lower bending roller (4) have the same structure and dimensions; The first displacement sensor (51) is used to monitor its radial distance from the outer wall of the middle roller section (21) of the upper inlet bending roller (2), the second displacement sensor (52) is used to monitor its radial distance from the outer wall of the middle roller section (21) of the upper outlet bending roller (3), and the third displacement sensor (53) is used to monitor its radial distance from the outer wall of the middle roller section (21) of the lower inlet bending roller (4).

3. The hot roll box bending roller component according to claim 2, characterized in that: The first displacement sensor (51), the second displacement sensor (52) and the third displacement sensor (53) are all laser displacement sensors; During operation, the laser beam of the first displacement sensor (51) is projected radially along the upper inlet bending roller (2) onto the outer wall of the middle roller section (21) of the upper inlet bending roller (2), the laser beam of the second displacement sensor (52) is projected radially along the upper outlet bending roller (3) onto the outer wall of the middle roller section (21) of the upper outlet bending roller (3), and the laser beam of the third displacement sensor (53) is projected radially along the lower bending roller (4) onto the outer wall of the middle roller section (21) of the lower bending roller (4).

4. The hot roll box bending roller component according to claim 3, characterized in that: The first displacement sensor (51), the second displacement sensor (52) and the third displacement sensor (53) are fixedly mounted on the upper roller frame (1) and are all located on the upper side of the inlet upper bending roller (2) and the outlet upper bending roller (3); The upper roller frame (1) is provided with a first through hole, a second through hole and a third through hole with parallel axes, and the third through hole is located between the first through hole and the second through hole; During operation, the laser beam of the first displacement sensor (51) passes through the first through hole, the laser beam of the second displacement sensor (52) passes through the second through hole, and the laser beam of the third displacement sensor (53) passes through the third through hole.

5. The hot roll box bending roller component according to claim 3, characterized in that: The first displacement sensor (51), the second displacement sensor (52) and the third displacement sensor (53) are provided with at least three sets and are all evenly distributed along the axial direction of the upper bending roller (2) at the inlet.

6. The hot roll box bending roller component according to any one of claims 1-5, characterized in that: The upper roller frame (1) is provided with an upper drive motor (93) for simultaneously driving the inlet upper bending roller (2) and the outlet upper bending roller (3) to rotate synchronously, and the base is provided with a lower drive motor (94) for driving the lower bending roller (4) to rotate. It also includes a controller (99), a first angular displacement sensor (81) for monitoring the rotation angle of the upper bending roller (2) at the inlet and the upper bending roller (3) at the outlet, and a second angular displacement sensor (82) for monitoring the rotation angle of the lower bending roller (4). The first displacement sensor (51), the second displacement sensor (52), the third displacement sensor (53), the data processing module (6), the first angular displacement sensor (81), the second angular displacement sensor (82), the upper drive motor (93), and the lower drive motor (94) are electrically connected to the controller (99).

7. The hot roll box bending roller component according to claim 6, characterized in that: The telescopic hydraulic cylinder (9) is equipped with a displacement sensor (91) for monitoring the telescopic distance of its free end and an electromagnetic directional valve (92) for controlling the telescopic movement of the telescopic hydraulic cylinder (9). The displacement sensor (91) and the electromagnetic directional valve (92) are electrically connected to the controller (99).

8. A method for adjusting the roll gap of a bending roll component in a hot rolling box, characterized in that, The hot roll box bending roller component according to claim 6 or 7 includes the following steps: S1. Input the initial roll diameter d0 of the inlet upper bending roll (2), the outlet upper bending roll (3) and the lower bending roll (4), the initial radial distance measured by the first displacement sensor (51), the second displacement sensor (52) and the third displacement sensor (53), the preset roll change warning value J, the inner diameter D of the intermediate billet coil and the thickness H of the intermediate billet plate into the data processing module (6); the roll change warning value J is less than the initial roll diameter d0; The initial radial spacing was measured when the telescopic hydraulic cylinder (9) pushed the upper roller frame (1) downward to rotate around the first rotating shaft relative to the base to the lower limit position and all the bent rollers were new rollers; S2, The telescopic hydraulic cylinder (9) pushes the upper roller frame (1) to rotate relative to the base around the first rotating shaft to the lower limit position; S3. Drive the upper bending roller (2) at the inlet, the upper bending roller (3) at the outlet, and the lower bending roller (4) to rotate synchronously around their respective axes at least once. The first displacement sensor (51), the second displacement sensor (52), and the third displacement sensor (53) synchronously monitor the real-time radial distance of the outer wall of their respective bending shafts and transmit the measurement data to the data processing module (6) in real time. The first angle displacement sensor (81) synchronously monitors the rotation angle of the upper bending roller (2) at the inlet and the upper bending roller (3) at the outlet in real time. The second angle displacement sensor (82) synchronously monitors the rotation angle of the lower bending roller (4) in real time. When the first angle displacement sensor (81) detects that the rotation angle of the upper bending roller reaches a positive integer multiple of 360°, the controller (99) controls the upper bending roller (2) at the inlet and the upper bending roller (3) at the outlet to stop rotating; when the second angle displacement sensor (82) detects that the rotation angle of the lower bending roller (4) reaches a positive integer multiple of 360°, the controller (99) controls the lower bending roller (4) to stop rotating and shuts down the first displacement sensor (51), the second displacement sensor (52), the third displacement sensor (53), the first angle displacement sensor (81), and the second angle displacement sensor (82). S4. The data processing module (6) calculates the average value of the dataset output in step S3 to obtain the actual radial distance of each bending roller, and calculates the actual roller diameter of each bending roller. S5. Output the actual roller diameter corresponding to each bending roller to the data display module (7) for display, and compare the actual roller diameter of each bending roller with the roller replacement warning value J; If there is an actual roll diameter less than or equal to the roll replacement warning value J, the replacement information of the corresponding curved roll is sent to the data display module (7) for display. After replacing the corresponding curved roll, proceed to step S6. If all actual roll diameters are greater than the roll change warning value J, proceed directly to step S6; S6. Calculate the extension and retraction stroke △LH of the roll gap RG to be set and the telescopic hydraulic cylinder (9) and output it to the display module 7 for display. Adjust the extension and retraction stroke of the telescopic hydraulic cylinder (9) according to the value of △LH. There is no restriction on the order of steps S1 and S2.

9. The method for adjusting the roll gap of the bending roll component in a hot rolling box as described in claim 8, characterized in that: In step S1, the initial radial distance of the first displacement sensor (51) is the initial radial distance L1 between the first displacement sensor (51) and the outer wall of the inlet upper bending roller (2), the initial radial distance of the second displacement sensor (52) is the initial radial distance L2 between the second displacement sensor (52) and the outlet upper bending roller (3), and the initial radial distance of the third displacement sensor (53) is the initial radial distance L3 between the third displacement sensor (53) and the lower bending roller (4). The actual radial distance between the first displacement sensor (51) and the outer wall of the inlet upper bending roller (2) measured in step S3 is L1′, the actual radial distance between the second displacement sensor (52) and the outlet upper bending roller (3) is L2′, and the actual radial distance between the third displacement sensor (53) and the lower bending roller (4) is L3′. The actual diameter of the inlet bending roller (2) is d1, d1=d0-2×(L1-L1′); The actual diameter of the curved roller (3) at the outlet is d2, d2=d0-2×(L2-L2′); The actual diameter of the lower bending roller (4) is d3, where d3 = d0 - 2 × (L3 - L3′).

10. The method for adjusting the roll gap of the bending roll component in a hot rolling box as described in claim 9, characterized in that: The data input to the data processing module (6) in step S1 also includes: Loa: The distance between the axis of the first rotating shaft and the axis of the lower bending roller (4); Lob: The distance between the center line of the first rotating shaft and the center line of the upper bending roller (3) at the outlet; Loc: The distance between the center line of the first rotating shaft and the upper bending roller (2) at the inlet; Lod: The distance between the first and second pivots; α: The angle between the line connecting the first shaft to the second shaft and the line connecting the first shaft to the center of the upper bending roller at the outlet; E1: The distance between the upper end of the telescopic hydraulic cylinder (9) and the first rotating shaft in the horizontal direction; E2: The distance between the upper end of the telescopic hydraulic cylinder (9) and the first rotating shaft in the vertical direction; LH min The axial length of the hydraulic telescopic rod 9 when the telescopic end of the telescopic hydraulic cylinder (9) is at the upper limit position; The axial displacement ΔLH of the telescopic hydraulic cylinder (9) at the telescopic end in step S6 is calculated as follows: S6.

1. Establish a plane rectangular coordinate system XOY with the plane perpendicular to the lower bending roller (4) as the coordinate plane, the projection of the first axis on the coordinate plane as the coordinate origin O, the axis parallel to the horizontal plane and perpendicular to the first axis as the X-axis, and the axis perpendicular to both the first axis and the X-axis as the Y-axis. S6.

2. On the plane rectangular coordinate system XOY, confirm the projection center point C of the inlet upper bending roller (2), the projection center point B of the outlet upper bending roller, and the projection center point A of the lower bending roller (4) on the coordinate system, and preset the projection center point F of the intermediate billet steel coil on the coordinate system. When the bending roller is in operation, the coordinate origin O, the projection center point C and the projection center point B are collinear. The line connecting the midpoint G of line segment BC and the projection center point A is perpendicular to line segment BC. The midpoint G, the projection center point A and point F are collinear. S6.3 Calculate the required roll gap for the bending roll: Lbf: Center distance between the intermediate billet coil and the exit bending roll (3); Lbg: Half the center distance between the inlet upper bending roller (2) and the outlet upper bending roller (3); Lfg: The distance between the center line of the inlet upper bending roll (2) and the outlet upper bending roll (3) and the center line of the intermediate billet coil; Lof: The distance between the first axis and the center line of the intermediate billet coil; Log: Distance between the first axis and the midpoint of the line connecting the center of the inlet upper bending roller (2) and the outlet upper bending roller (3); The angle between line segment OF and line segment OB; Laf: Center distance between the lower bending roll (4) and the intermediate billet coil; The angle between line segment OA and line segment OF; The angle between line segment OA and the X-axis; The angle between line segment OA and line segment OB; The angle between line segment OB and the X-axis; Lab: Center distance between the upper bending roller (3) and the lower bending roller (4) at the outlet; RG: The roll gap between the upper bending roll (3) and the lower bending roll (4) at the outlet; S6.4 Calculate the required axial length of the telescopic hydraulic cylinder (9) and the stroke of the telescopic end of the telescopic hydraulic cylinder (9). : D1: X-axis coordinate of the telescopic end of the telescopic hydraulic cylinder (9) when the gap between the upper bending roller (3) and the lower bending roller (4) at the outlet is RG; D2: The Y-axis coordinate of the telescopic hydraulic cylinder (9) at the telescopic end when the gap between the upper bending roller (3) and the lower bending roller (4) at the outlet is RG; E1: X-axis coordinate of the fixed end of the telescopic hydraulic cylinder (9); E2: Y-coordinate of the fixed end of the telescopic hydraulic cylinder (9); LH: The total axial length of the telescopic hydraulic cylinder (9) when the roll gap between the upper bending roller (3) and the lower bending roller (4) at the outlet is RG; : The stroke of the telescopic hydraulic cylinder (9) at the telescopic end.

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