Accuracy calibration device and calibration method for side roll equipment of 18-roll reversible cold rolling mill

Abstract

This application discloses a calibration device and method for the precision calibration of the side rolls of an 18-roll reversible cold rolling mill. The calibration devices are respectively installed at the upper and lower parts of the mill inlet and outlet. The calibration devices include: a lower base, spanning the lower support roll along the strip rolling direction and positioned above the lower support roll; an upper base, positioned above and connected to the lower base; a calibration frame, positioned along the strip rolling direction and capable of sliding along the strip rolling direction; a side support end block that slides with the calibration frame and contacts a frame end block fixed to the mill stand; a first displacement sensor, a second displacement sensor, and a first pressure sensor, both of which are mounted on the calibration frame; the first pressure sensor is integrated into the hydraulic cylinder of the side support device; a frame displacement sensor is mounted on the mill stand; and a side support device displacement sensor is mounted on the side support device.

Description

Technical Field

[0001] This application relates to the field of metallurgical equipment technology, and in particular to a precision calibration device and calibration method for the side rolls of an 18-roll reversible cold rolling mill. Background Technology

[0002] In the cold rolling process of steel, the precision of the side rolls of an 18-roll reversible rolling mill has a significant impact on product quality and production efficiency. However, due to various factors during production, such as mechanical wear and temperature variations, the precision of the side rolls often changes. Therefore, regularly calibrating the side rolls to ensure they are in optimal working condition is an indispensable part of cold rolling production.

[0003] Existing methods for calibrating the side rolls of 18-roll reversible cold rolling mills mostly employ traditional mechanical measurement techniques, such as using micrometers and vernier calipers. However, these methods suffer from drawbacks such as low measurement accuracy, complex operation, and long processing times, failing to meet the high-precision and high-efficiency requirements of modern cold rolling production lines. Summary of the Invention

[0004] This application provides a method for calibrating the accuracy of the side roll equipment of a cold rolling 18-roll reversible mill, which can quickly and accurately calibrate the accuracy of the side roll equipment.

[0005] In a first aspect, this application provides a precision calibration device for the side roll equipment of a cold-rolling 18-roll reversible mill. At least one calibration device is provided, and the calibration device can be located at at least one of the upper and lower parts of the mill inlet and the upper and lower parts of the mill outlet, with the calibration device situated at both ends of the work rolls along their axial direction. The calibration device includes: The calibration frame is movable in the first direction; both ends of the calibration frame along the axial direction of the work roller are provided with side support blocks, which can move with the calibration frame under the drive of the drive device. The stand end block is installed on the stand of the rolling mill; the side support end block can contact the stand end block fixed to the rolling mill stand during the movement of the calibration stand, so as to transmit the displacement data and pressure data of the side roll equipment. The system comprises a first displacement sensor, a second displacement sensor, and a first pressure sensor. The first and second displacement sensors are both mounted on a calibration frame. The first pressure sensor is located at the contact connection between the side support end block and the frame end block.

[0006] According to an embodiment of the first aspect of this application, the calibration device further includes: a limiting structure such that the calibration frame is located on the lower base and / or upper base of the rolling mill, and moves between the lower base and the upper base in a first direction.

[0007] According to an embodiment of the first aspect of this application, the limiting structure is a guide rail, and the calibration frame is slidably connected in the guide rail.

[0008] According to an embodiment of the first aspect of this application, the upper base and the lower base are bolted together.

[0009] According to an embodiment of the first aspect of this application, a side support end block is disposed on the calibration frame along the axial direction of the work roller itself and connected to the calibration frame, and a first displacement sensor and a second displacement sensor are disposed on the side support end block.

[0010] According to an embodiment of the first aspect of this application, the precision calibration device for the side roll equipment of a cold rolling 18-roll reversible mill further includes a side support device, the side support device comprising: Side support base; A side-push hydraulic cylinder is installed in the side support base; The side-push movable beam is connected to the side support base by a side-push hydraulic cylinder; The side roller is mounted on the side of the side push movable beam away from the side support base.

[0011] Secondly, this application provides a method for calibrating the accuracy of the side roll equipment of a cold rolling 18-roll reversible mill, including: Install the calibration device on the rolling mill; The calibration frame is moved along the first direction by the drive device, so that the side support end block of the calibration frame is close to the end block of the frame. Displacement data is measured by the first displacement sensor and the second displacement sensor, and pressure data is measured by the first pressure sensor. The actual accuracy value of the side roller device is calculated based on the displacement and pressure data measured by the first displacement sensor, the second displacement sensor, and the first pressure sensor.

[0012] According to an embodiment of the second aspect of this application, the actual accuracy value of the side roller device is calculated based on the displacement data and pressure data measured by the first displacement sensor, the second displacement sensor, and the first pressure sensor according to the following formula (1): (1), In equation (1), Δ represents the side roller accuracy, and α i : Measured displacement value of displacement sensor, β i Theoretical displacement value (based on rolling mill geometry parameters); n For the number of measurement points; F 实际 : Actual pressure value measured by the pressure sensor; k The correction factor was determined experimentally, with a range of 0.05-0.1. F 理论 The theoretical pressure value of the pressure sensor.

[0013] According to an embodiment of the second aspect of this application, the method for calibrating the accuracy of the side roll equipment of a cold rolling 18-roll reversible mill further includes: Based on the preset accuracy requirements, determine whether the side roller equipment needs adjustment.

[0014] According to an embodiment of the second aspect of this application, the method for calibrating the accuracy of the side roll equipment of a cold rolling 18-roll reversible mill further includes: If the actual accuracy value of the side roller equipment does not meet the preset requirements, the position of the side support device will be automatically adjusted so that the actual accuracy value of the side roller equipment meets the preset requirements.

[0015] The accuracy calibration device and method for the side roll equipment of the 18-roll reversible cold rolling mill in this application embodiment employs a calibration frame, a side support end block set on the calibration frame, and a frame end block set on the mill. Through advanced first and second displacement sensors and a first pressure sensor set on the calibration frame, the side support end block can move with the calibration frame under the drive of the driving device. During the movement with the calibration frame, the side support end block can contact the frame end block fixed to the mill frame to transmit displacement and pressure data of the side roll equipment. This achieves rapid and accurate calibration of the side roll equipment accuracy, that is, rapid and accurate calibration of the accuracy of the side rolls and work rolls in the side roll equipment, effectively saving the calibration time required. This allows the mill to perform cold rolling of strip steel with more precise rolling accuracy, thereby improving the product quality and production efficiency of cold rolling production. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the accuracy calibration device for the side roll equipment of the 18-roll reversible cold rolling mill provided in this application embodiment.

[0018] Figure 2 This is a schematic diagram of the precision calibration device for the side roll equipment of the cold rolling 18-roll reversible rolling mill provided in the embodiments of this application, and the structure of the rolling mill.

[0019] Figure 3 This is a schematic diagram of the side support device of the precision calibration device for the side roll equipment of the cold rolling 18-roll reversible mill provided in the embodiments of this application.

[0020] Figure 4 This is a flowchart illustrating the accuracy calibration method for the side roll equipment of the cold rolling 18-roll reversible mill provided in this application embodiment.

[0021] Explanation of reference numerals in the attached figures: 1. Calibration device; 100. Limiting structure; 100a. Guide rail; 11. Calibration frame; 12. Side support end block; 13. First displacement sensor; 14. Second displacement sensor; 15. First pressure sensor; 2. Frame end block; 3. Drive device; 31. Hydraulic cylinder; 32. Telescopic rod; 4. Rolling mill frame; 5. Support roll; 6. Intermediate roll; 7. Work roll; 8. Lower base; 9. Side support device; 91. Side support base; 92. Side push hydraulic cylinder; 93. Side push movable beam; 94. Side roll; 10. Upper base; A. Mill inlet; B. Mill outlet; X. First direction; Y. Axial direction of the work roll itself; Z. Second direction. Detailed Implementation

[0022] The features and exemplary embodiments of various aspects of this application will be described in detail below. To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain this application and not to limit it. For those skilled in the art, this application can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of this application by illustrating examples.

[0023] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes said element.

[0024] As described in the background section, existing side roll calibration technologies rely on manual mechanical measurement (such as micrometers), resulting in a separation between detection and calibration. They can only achieve static detection and cannot perform online calibration. Measurement personnel are subject to subjective errors, and manual readings are easily influenced by the operator's experience. Calibration efficiency is low, with a single calibration taking more than 2 hours, which cannot meet the high-speed continuous rolling requirements of cold-rolled 18-roll reversible mills.

[0025] To address the problems existing in the prior art, embodiments of this application provide a precision calibration device 1 and calibration method for the side roll equipment of a cold rolling 18-roll reversible mill.

[0026] Figure 1 A schematic diagram of the structure of a precision calibration device 1 for the side roll equipment of an 18-roll reversible cold rolling mill provided in one embodiment of this application is shown.

[0027] like Figure 1 As shown, a precision calibration device 1 for the side roll equipment of a cold rolling 18-roll reversible mill is provided. At least one calibration device 1 is provided, and it can be located at at least one position between the upper and lower parts of the mill inlet A and the upper and lower parts of the mill outlet B. The calibration device 1 is located at both ends of the work roll 7 along its own axial direction. The calibration device 1 includes: The calibration frame 11 is capable of moving along the first direction X; both ends of the calibration frame 11 along the axial direction Y of the working roller 7 are provided with side support blocks 12, which can move with the calibration frame 11 under the drive of the drive device 3. The frame end stop 2 is installed on the mill frame 4; the side support end stop 12 can contact the frame end stop 2 fixed to the mill frame 4 during the movement of the calibration frame 11, so as to transmit the displacement data and pressure data of the side roll equipment. The first displacement sensor 13, the second displacement sensor 14, and the first pressure sensor 15 are provided. The first displacement sensor 13 and the second displacement sensor 14 are both mounted on the calibration frame 11. The first pressure sensor 15 is located at the contact connection between the side support end block 12 and the frame end block 2.

[0028] The accuracy calibration device 1 for the side roll equipment of the cold rolling 18-roll reversible mill in this application embodiment is provided at least once. It can be installed at at least one of four positions: the upper and lower parts of the mill inlet A, and the upper and lower parts of the mill outlet B. The calibration device 1 is set at both ends of the work roll 7 of the mill along its own axial direction. It adopts a calibration frame 11, a side support end block 12 set on the calibration frame 11, and a frame end block 2 set on the mill. With the help of advanced first displacement sensor 13, second displacement sensor 14, and first pressure sensor 15, the side support end block 12 can move with the calibration frame 11 under the drive of the drive device 3. As the calibration frame 11 moves, the end block 12 can contact the frame end block 2 fixed to the mill frame 4. The displacement data of the side roll equipment and the pressure data of the first pressure sensor 15 are transmitted through the first displacement sensor 13 and the second displacement sensor 14 on the side end block 12. This enables rapid and accurate calibration of the side roll equipment, that is, rapid and accurate calibration of the side roll 94 and the work roll 7 in the side roll equipment. This effectively saves the time required for calibration, allowing the mill to perform cold rolling of strip steel with more precise rolling accuracy, thereby improving the product quality and production efficiency of cold rolling.

[0029] It should be noted that, as Figure 1As shown, the first displacement sensor 13 and the second displacement sensor 14 are disposed at both ends of the calibration frame 11 along the first direction X, and are aligned with the positions of the end blocks 2 of the frame. That is, the first displacement sensor 13 and the second displacement sensor 14 have orthographic projections on the end blocks 2 of the frame along the first direction X, so that the calibration frame 11 can directly detect the displacement of the side support end blocks 12 on the calibration frame 11 from the end blocks 2 of the frame during the movement of the calibration frame 11 along the first direction X. The work roll 7 is the main working component of the rolling mill for rolling. During accuracy calibration, the work roll 7 is located between the side support devices 9 along the second direction Z, and the work roll 7 is located at the lower and upper parts of the calibration frame 11 along the second direction Z, respectively.

[0030] In some embodiments of this application, the calibration device 1 further includes a limiting structure 100, such that the calibration frame 11 is located on the lower base 8 and / or the upper base 10 of the rolling mill, and moves between the lower base 8 and the upper base 10 along a first direction X. It should be noted that the lower base 8 and the upper base 10 here refer to the lower base 8 and the upper base 10 on which the intermediate roll 6 of the rolling mill is installed.

[0031] In some embodiments of this application, the limiting structure 100 is a guide rail 100a, and the calibration frame 11 is slidably connected to the guide rail 100a. The guide rail 100a is disposed on the upper base 10 and / or the lower base 8, and the calibration frame 11 is slidably connected to the guide rail 100a. The length or sliding distance of the guide rail 100a limits the sliding distance of the calibration frame 11. The calibration frame 11 can be driven by an additionally provided driving device 3 to slide on the guide rail 100a, so as to achieve dynamic, rapid, and accurate calibration of the accuracy of the side roll 94 of the side roll equipment and the work roll 7 of the rolling mill. It is understood that, as Figure 1 As shown, the drive device 3 can be a hydraulic cylinder 31 connected to the calibration frame 11, connected to the calibration frame 11 via a telescopic rod in the hydraulic cylinder 31. The extension or retraction of the telescopic rod within the hydraulic cylinder 31 allows the calibration frame 11 to move along the first direction X in the guide rail 100a. Alternatively, the drive device 3 can be a gear and rack or a transmission belt connected to the calibration frame 11, and then driven by a motor, the rack or transmission belt meshing with the gear drives or propels the calibration frame 11 to slide along the guide rail 100a, thus allowing the calibration frame 11 to move along the first direction X in the guide rail 100a. It should be noted that, as... Figure 1 As shown, the first direction X refers to the direction of movement from the mill inlet A or the mill outlet B towards the location of the mill work roll 7, or the direction of movement from the work roll 7 towards the location of the mill inlet A or the mill outlet B, so that the calibration frame 11 of the calibration device 1 located at the upper and lower parts of the mill inlet A and the mill outlet B can slide along the guide rail 100a in a single direction to ensure the stability of the calibration detection interface.

[0032] like Figure 2As shown, by using the lower base 8 and / or upper base 10 of the intermediate roll 6 in the rolling mill as the reference support platform of the calibration device 1, the upper base 10 and the lower base 8 are connected and arranged at intervals along the second direction Z. The lower base 8 and / or upper base 10 are used to fix the calibration frame 11, so that the calibration frame 11 can only move along the first direction X. The calibration frame 11 is provided with a side support end block 12, which can slide with the calibration frame 11 under the drive of the drive device 3, and is used to contact the frame end block 2 fixed to the rolling mill frame 4 to transmit the displacement data and pressure data of the side roll equipment, so as to realize the rapid and accurate calibration of the accuracy of the side roll equipment, that is, to quickly and accurately calibrate the accuracy of the side roll 94 and the work roll 7 in the side roll equipment.

[0033] In the accuracy calibration device 1 for the side roll equipment of the cold rolling 18-roll reversible mill according to the embodiments of this application, the upper base 10 and the lower base 8 can be connected at intervals by high-strength bolts. Relatively speaking, bolt connection is convenient for maintaining the upper base 10 and the lower base 8. It is understood that the upper base 10 can also be connected by welding or a quick-release snap-fit ​​structure, but compared with the advantage of bolt connection for easy maintenance, welding or snap-fit ​​method is not convenient for maintenance.

[0034] In some embodiments of this application, the side support end block 12 is disposed at both ends of the calibration frame 11 along the axial direction Y of the working roller 7 and is connected to the calibration frame 11. The first displacement sensor 13 and the second displacement sensor 14 are disposed on the side support end block 12 along the first direction X.

[0035] In the accuracy calibration device 1 for the side roll equipment of the 18-roll reversible cold rolling mill according to the embodiments of this application, the side support end block 12 is a component of the calibration frame 11. During the movement of the calibration frame 11 along the first direction X driven by the drive device 3, the side support end block 12 is used to contact the stand end block 2. The stand end block 2 is a fixed component of the calibration device 1 on the side of the mill near the stand, so as to limit the calibration frame 11 to move further towards the side near the stand in the first direction X. It can be understood that the drive device 3 can be detachably and independently set on the mill stand 4, or set independently outside the mill stand 4, so that the drive device 3 can drive the calibration frame 11 to reciprocate along the first direction X. This application does not further limit it.

[0036] In some embodiments of this application, the contact force between the side support end block 12 and the frame end block 2 can be dynamically adjusted by the hydraulic cylinder 31 of the drive device 3, with an adjustment range of 5KN to 15KN. The side support end block 12 can slide with the calibration frame 11 and contact the frame end block 2 under the push of the hydraulic cylinder 31 to form a dynamic measurement interface.

[0037] In some embodiments of this application, the first displacement sensor 13, the second displacement sensor 14, and the frame displacement sensor can all be laser displacement sensors, infrared displacement sensors, or ultrasonic ranging sensors. Optionally, the first displacement sensor 13, the second displacement sensor 14, and the frame displacement sensor can all be laser displacement sensors.

[0038] In some embodiments of this application, the precision calibration device 1 for the side roll equipment of the cold rolling 18-roll reversible mill further includes a side support device 9, such as... Figure 3 As shown, the side support device 9 includes: Side support base 91; A side-push hydraulic cylinder 92 is installed in the side support base 91; The side-push movable beam 93 is connected to the side support base 91 by the side-push hydraulic cylinder 92; The side roller 94 is mounted on the side of the side push movable beam 93 away from the side support base 91.

[0039] The accuracy calibration device 1 for the side roll equipment of the cold rolling 18-roll reversible mill in this application embodiment is mainly used to calibrate the overall parallelism between the side roll 94 and the work roll 7 of the side roll equipment. This integrates accuracy calibration and detection with accuracy adjustment of the side roll equipment. Data is collected in real time by the first displacement sensor 13, the second displacement sensor 14, and the first pressure sensor 15. Combined with a closed-loop control algorithm, the position of the side roll 94 is adjusted to ensure that the accuracy of the side roll equipment meets the preset requirements. It should be noted that the side support device 9 is the same as the side roll equipment.

[0040] In the accuracy calibration device 1 of the cold rolling 18-roll reversible mill side roll equipment in this application embodiment, the side support base 91 serves as the base for fixing the side support device 9 and plays the role of supporting the structure other than the base. The side push hydraulic cylinder 92 is integrated into the side support base 91 of the side support device 9 and serves as the drive device 3. After the calibration device 1 determines that the accuracy does not meet the limit requirements and the side roll 94 needs to be adjusted, it drives the side push movable beam 93 of the side support device 9 and the side roll 94 located therein to move to the target position, so as to adjust the value until the accuracy of the side roll 94 and the working roll 7 of the mill meets the limit requirements, thereby facilitating the mill to carry out efficient and accurate continuous rolling production of strip steel.

[0041] For example, in the side roll equipment precision calibration device 1 of a cold rolling 18-roll reversible mill in some embodiments, the side support end block 12 of the calibration frame 11 is brought close to the frame end block 2. During this process, displacement sensors and pressure sensors collect displacement data and pressure data in real time and transmit them to the computer control system. The computer control system calculates the displacement data and pressure data, calculates and determines the parallelism of the side roll 94, that is, calculates whether the calibration accuracy of the side roll equipment meets the target requirements. Then, based on the parallelism calculation, the adjustment amount of the side roll 94 in the side roll equipment is adjusted, and the side push hydraulic cylinder 92, which is the drive device 3, drives the side support device 9 to adjust the parallelism of the side roll 94 of the corresponding side support device 9, so that the accuracy of the side roll equipment meets the specified requirements. Thus, the dynamic calibration and automatic calibration of the parallelism of the side roll 94 are realized, solving the technical bottleneck of online calibration and real-time adjustment.

[0042] Figure 4 A flowchart illustrating a method for calibrating the accuracy of side roll equipment in a cold rolling 18-roll reversible mill according to an embodiment of this application is shown.

[0043] Secondly, the method for calibrating the accuracy of the side roll equipment of the cold rolling 18-roll reversible mill provided in the embodiments of this application is based on the calibration device 1 described in the first aspect, and therefore can be referred to together with it. Figures 1-4 The calibration methods include: Install calibration device 1 on the rolling mill; The calibration frame 11 is moved along the first direction X by the drive device 3, so that the side support end block 12 of the calibration frame 11 is close to the frame end block 2. The displacement data is measured by the first displacement sensor 13 and the second displacement sensor 14, and the pressure data is measured by the first pressure sensor 15. The actual accuracy value of the side roller 94 device is calculated based on the displacement and pressure data measured by the first displacement sensor 13, the second displacement sensor 14, and the first pressure sensor 15.

[0044] In the method for calibrating the accuracy of the side roll equipment of the 18-roll reversible cold rolling mill provided in this application embodiment, based on the calibration device 1 provided in the first aspect embodiment, when the rolling mill is not performing cold rolling production operations, the calibration device 1 is installed on the rolling mill. By using a calibration frame 11, a side support end block 12 set on the calibration frame 11, and a frame end block 2 set on the rolling mill, the side support end block 12 can move with the calibration frame 11 under the drive of the drive device 3. During the movement with the calibration frame 11, the side support end block 12 can contact the frame end block 2 fixed on the rolling mill frame 4, and obtain displacement data through an advanced first displacement sensor 13 and a second displacement sensor 14, and obtain pressure data through an advanced first pressure sensor 15, so as to transmit the displacement data and pressure data of the side roll equipment and perform calculations to obtain the accuracy of the side roll equipment of the 18-roll reversible cold rolling mill, thereby realizing the rapid and accurate calibration of the accuracy of the side roll equipment, that is, realizing the rapid and accurate calibration of the accuracy of the side roll 94, improving the product quality and production efficiency of cold rolling production. Compared with traditional mechanical methods for measuring the accuracy of side roll equipment, the method for calibrating the accuracy of side roll equipment in the cold rolling 18-roll reversible mill of this application further simplifies the operation process of calibration device 1, reduces the difficulty and time consumption of operation of calibration device 1, and can realize online automatic adjustment of the accuracy of side roll equipment by controlling the calibration equipment through computer control system, reducing manual intervention and improving the working efficiency and safety of cold rolling production.

[0045] The method for calibrating the accuracy of the side roll equipment of the cold rolling 18-roll reversible mill provided in this application embodiment uses the following collaborative mechanism: the displacement data of the first displacement sensor 13 and the second displacement sensor 14 and the pressure data of the first pressure sensor 15 are transmitted to the computer system in real time via the Profinet protocol. Combined with the mill geometric parameters, such as the roll gap and the 94-degree tilt angle of the side roll, a comprehensive analysis is performed to obtain the actual accuracy value of the side roll equipment.

[0046] In some embodiments of this application, the actual accuracy value of the side roller device is calculated according to the displacement data and pressure data measured by the first displacement sensor 13, the second displacement sensor 14 and the first pressure sensor 15 according to the following formula (1): (1), In equation (1), Δ represents the side roller accuracy, and α i : Measured displacement value of displacement sensor, β i Theoretical displacement value (based on rolling mill geometry parameters); n Number of measurement points; F 实际 : Actual pressure value measured by the pressure sensor; k The correction factor, determined experimentally, ranges from 0.05 to 0.1. F 理论The theoretical pressure value of the pressure sensor.

[0047] It should be noted that the measured displacement value of the displacement sensor includes the measured displacement values ​​of the first displacement sensor 13 and the second displacement sensor 14 respectively, and the theoretical displacement value includes the theoretical displacement values ​​of the first displacement sensor 13 and the second displacement sensor 14 respectively; the measured value of the pressure sensor is the measured value of the first pressure sensor 15, and the theoretical pressure value of the pressure sensor is the theoretical pressure value of the first pressure sensor 15. The above theoretical values ​​are the initial theoretical displacement values ​​or theoretical pressure values ​​set when the side roll 94 and the work roll 7 of the rolling mill are working normally. It is understood that as the side roll 94 and the work roll 7 of the rolling mill wear during the production process, the theoretical displacement values ​​of the displacement sensor and the theoretical pressure values ​​of the pressure sensor may change accordingly, and can be determined according to the actual situation. Among them, in formula (1), n The number of measurement points represents the number of times displacement data is collected during the calibration process, for example, once every 0.5 seconds, for a total of n collections.

[0048] In some embodiments of this application, the method for calibrating the accuracy of the side roll equipment of an 18-roll reversible cold rolling mill further includes: Based on the preset accuracy requirements, determine whether the side roller equipment needs adjustment.

[0049] In some embodiments of this application, the method for calibrating the accuracy of the side roll equipment of an 18-roll reversible cold rolling mill further includes: If the actual progress value of the side roller equipment does not meet the preset requirements, the position of the side support device 9 will be automatically adjusted so that the actual accuracy value of the side roller equipment meets the preset requirements.

[0050] In the method for calibrating the accuracy of the side roll equipment of the cold rolling 18-roll reversible mill according to the embodiments of this application, the displacement data and pressure data of the side roll 94 are measured by a calibration device 1 installed at at least one of the four positions: the upper and lower parts of the mill inlet A, and the upper and lower parts of the mill outlet B. The calibration device 1 includes a first displacement sensor 13, a second displacement sensor 14, and a first pressure sensor 15. Then, through a closed-loop control system connected to the displacement and pressure sensors and an accuracy calculation model set in an external computer, the parallelism of the side roll 94 is dynamically detected and calibrated. The specific steps include: Displacement data and pressure data are collected by the first displacement sensor 13, the second displacement sensor 14, and the first pressure sensor 15, respectively. The thrust of hydraulic cylinder 31 is dynamically adjusted based on the PID algorithm; The parallelism deviation between the side roll 94 in the side support device 9 and the work roll 7 of the rolling mill is calculated based on the least squares method and the geometric parameters of the rolling mill.

[0051] In some embodiments of this application, the method for calibrating the accuracy of the side roll equipment of an 18-roll reversible cold rolling mill includes: Compare the parallelism deviation between the side roll 94 of the side roll device and the work roll 7 of the rolling mill with the first error limit. If the parallelism deviation exceeds the first error limit, the side support device 9 is automatically adjusted. After the side support device 9 is adjusted, the parallelism deviation between the side roll 94 of the side roll equipment and the work roll 7 of the rolling mill is measured again until the parallelism deviation of the side roll 94 is less than or equal to the first error limit.

[0052] In some embodiments of this application, the first error limit is 0.005 mm, that is, a parallelism deviation of ≤0.005 mm is considered acceptable.

[0053] The method for calibrating the accuracy of the side roll equipment of the 18-roll reversible cold rolling mill in this embodiment employs a calibration device 1 and advanced displacement and pressure sensors mounted on the calibration device 1, along with a computer connected to these sensors to control the side roll 94 support device. This achieves rapid and accurate calibration of the side roll equipment accuracy, improving product quality and production efficiency. Compared to traditional mechanical measurement methods, the method for calibrating the accuracy of the side roll equipment of the 18-roll reversible cold rolling mill in this embodiment further simplifies the operation process of the calibration device 1, reduces the operational difficulty and time consumption of the calibration device 1, and enables automated adjustment of the side roll equipment accuracy by controlling the calibration device 1 through a computer control system. This reduces manual intervention and improves the work efficiency and safety of cold rolling production.

[0054] The method for calibrating the accuracy of the side roll equipment of the cold-rolled 18-roll reversible mill in this application calibrates the overall parallelism of the side roll 94 of the side roll equipment and the work roll 7 of the mill, that is, calibrates the accuracy of the side roll equipment so that the cold-rolled 18-roll reversible mill can carry out continuous cold rolling production of strip steel with higher accuracy, which can improve the production efficiency of the cold-rolled 18-roll mill and improve the quality of cold-rolled strip steel.

[0055] The method for calibrating the side roll equipment of the cold rolling 18-roll reversible mill in this application integrates a first displacement sensor 13, a second displacement sensor 14, a pressure sensor, and a computer closed-loop control system on the calibration device 1 to achieve dynamic calibration and automatic calibration of the 94-degree parallelism of the side rolls, thus solving the technical bottleneck of online calibration and real-time adjustment.

[0056] Furthermore, the method for calibrating the side roll equipment of the cold rolling 18-roll reversible mill described in this application can generate a detailed calibration report, providing a strong reference for subsequent cold continuous rolling production and maintenance of the cold rolling 18-roll reversible mill equipment.

[0057] The method for calibrating the accuracy of the side roll equipment of the cold rolling 18-roll reversible mill in this application embodiment calibrates the accuracy of the side roll 94 of the side roll 94 support device and the work roll 7 of the mill. It integrates the detection and calibration of the side roll 94 accuracy. The displacement data and pressure are collected in real time by the first displacement sensor 13, the second displacement sensor 14 and the first pressure sensor 15 for detection. The position of the side roll 94 is adjusted by combining the closed-loop control algorithm to ensure that the accuracy of the side roll 94 meets the preset requirements, so that the side roll 94 is in a more accurate position for the cold continuous rolling production of strip steel.

[0058] The method for calibrating the side roll equipment of the 18-roll reversible cold rolling mill provided in this application adopts advanced sensors and computer control, realizing rapid and accurate calibration of the side roll equipment accuracy. It has the advantages of simple operation, high precision and high degree of automation, and can be widely used in cold rolling production, providing a strong guarantee for improving product quality and production efficiency.

[0059] Test section The accuracy calibration method of the side roll equipment of the 18-roll reversible cold rolling mill of this application was applied to calibrate and adjust the accuracy of side roll 94 in the cold rolling production line of a steel plant, and compared with the traditional calibration method. Some of the materials and equipment used in Examples 1-2 and Comparative Example 1, or their available sources, are as follows: The first displacement sensor 13 and the second displacement sensor 14 are both laser displacement sensors, model: LMICocal-3D, with an accuracy of ±0.001mm.

[0060] The first pressure sensor 15 is a pressure sensor (model: Honeywell TJE) with a range of 0 to 50 kN and an accuracy of ±0.1% FS.

[0061] Comparative Example 1 The side roll equipment of the cold rolling 18-roll reversible mill was calibrated using traditional micrometers and vernier calipers.

[0062] Example 1 A precision calibration device 1 for the side rolls of a cold-rolling 18-roll reversible mill is provided. Four calibration devices 1 are installed, respectively located at the upper and lower parts of the mill inlet A, and the upper and lower parts of the mill outlet B. The calibration devices 1 are situated at both ends of the work rolls 7 along their axial direction. Figure 1 As shown, taking the calibration device located at the top of the mill inlet A as an example, the calibration device 1 includes: The calibration frame 11 is respectively set on the lower base 8 and the upper base 10 of the rolling mill via the guide rail 100a, which serves as the limiting structure 100, and can move along the first direction X on the guide rail 100a; both ends of the calibration frame 11 along the axial direction Y of the work roll itself are provided with side support blocks 12, which can move with the calibration frame 11 under the drive of the driving device 3. The stand end block 2 is set on the stand of the rolling mill and is at least partially set at the same height as the side support end block 12; the side support end block 12 can contact the stand end block 2 fixed to the rolling mill stand 4 during the movement of the calibration frame 11, so as to transmit the displacement data and pressure data of the side roll 94 equipment. The first displacement sensor 13, the second displacement sensor 14, and the first pressure sensor 15 are all located on the side support blocks 12 at both ends of the calibration frame 11 along its own axial direction. The first pressure sensor 15 is located at the contact connection between the side support block 12 and the frame end block 2.

[0063] Example 2 This embodiment provides a method for calibrating the accuracy of the side roll equipment of a cold rolling 18-roll reversible mill based on the accuracy calibration device 1 of Embodiment 1, including: like Figure 1 and Figure 2 As shown, the lower base 8 of the intermediate roll 6 in the rolling mill spans the lower support roll 8 and is fixed to the upper part of the lower support roll 5. The upper base 10 is bolted to the upper part of the lower base 8. The calibration device 1 is installed in the rolling mill, so that the calibration device 1 is located between the upper base 10 and the lower base 8, and the calibration frame 11 of the calibration device 1 is connected to the lower base 8 through the guide rail 100a, and the calibration frame 11 is limited to be able to move along the first direction X. The first displacement sensor 13, the second displacement sensor 14, and the pressure sensor of the calibration device 1 are initialized, the zero point of the sensors is calibrated, and the surface of the side roller 94 is cleaned. The system self-checks the communication status of the above sensors and the hydraulic system pressure to ensure that the above displacement sensors and pressure sensors are in normal working condition. The cold rolling 18-roll reversible mill is operated at a low speed of 10 m / min, but no strip rolling is performed. The hydraulic cylinder 31 of the drive device 3 pushes the calibration frame 11 of the calibration device 1 to move along the first direction X on the guide rail 100a, so that the side support end block 12 of the calibration frame 11 is close to the frame end block 2. The displacement data is measured by the first displacement sensor 13 and the second displacement sensor 14, and the pressure data is measured by the first pressure sensor 15. The measured displacement data and pressure data are uploaded to the computer system. The computer system dynamically adjusts the thrust of the hydraulic cylinder 31 through the PID algorithm to ensure that the contact force between the side support end block 12 and the frame end block 2 is stable at 10 kN ± 0.5 kN. The actual accuracy value of the side roller device is calculated according to the displacement and pressure data measured by the first displacement sensor 13, the second displacement sensor 14, and the first pressure sensor 15, using the following formula (1): (1), In equation (1), Δ represents the side roller accuracy, and α i : Measured displacement value of displacement sensor, β i Theoretical displacement value (based on rolling mill geometry parameters); n Number of measurement points; F 实际 : Actual pressure value measured by the pressure sensor; k The correction factor was determined experimentally, with a range of 0.05-0.1. F 理论 The theoretical pressure value of the pressure sensor; Based on the preset accuracy requirements, it is determined whether the side roller device needs adjustment, including: if the parallelism deviation of the side roller device is ≤0.005mm, that is, the accuracy of the side roller device meets the preset requirements, then there is no need to adjust the position of the side roller 94 in the side support device 9; if the actual accuracy value of the side roller device does not meet the preset requirements (accuracy ≤0.005mm), then the position of the side roller 94 in the side support device 9 is automatically adjusted so that the actual accuracy value of the side roller 94 device reaches the preset requirements, until the parallelism error is ≤0.005mm.

[0064] Example 3 The difference between Example 3 and Example 2 is that the cold rolling 18-roll reversible mill is operated at a low speed of 5m / min.

[0065] Finally, a calibration and adjustment report is generated, recording the calibration time, calibration value, number of adjustments, and final accuracy value of the parallelism of the side roller 94 in the side support device 9, and outputting a calibration report in PDF format.

[0066] Table 1 shows the calibration method of the side roll equipment accuracy calibration device 1 of the cold rolling 18-roll reversible rolling mill of embodiment 1 of this application used in embodiment 2 of this application, and the result parameters obtained by calibrating, adjusting and calibrating the accuracy of the side roll 94 using the conventional calibration method in comparative example 1.

[0067] Table 1 As shown in Table 1, compared to the traditional calibration method in Comparative Example 1 which uses mechanical measurement, the calibration method for the side roll equipment accuracy of the 18-roll reversible cold rolling mill of this application simplifies the calibration process, reduces operational difficulty, and significantly reduces the calibration time, shortening it by at least 12.5% ​​of the original calibration time. This effectively shortens the calibration time for the side roll equipment accuracy (i.e., the parallelism of side roll 94). Furthermore, the calibration method for the side roll equipment accuracy of the 18-roll reversible cold rolling mill of this application results in smaller calibration accuracy errors and a higher success rate in adjusting the side roll equipment accuracy. In other words, the accuracy calibration and adjustment of side roll 94 is more precise, improving calibration accuracy. The calibration method for the side roll equipment accuracy of the 18-roll reversible cold rolling mill of this application achieves rapid and accurate calibration and automated adjustment of the side roll equipment accuracy. Automated adjustment is achieved through a computer control system, reducing manual intervention, improving work efficiency and safety, and ultimately improving product quality and production efficiency. This enables the 18-roll cold rolling mill to better perform continuous cold rolling.

[0068] Furthermore, the calibration method for the side roll equipment accuracy of the cold rolling 18-roll reversible mill adopted in this application embodiment can generate a detailed calibration report based on the results of each calibration, providing a strong reference for subsequent strip rolling production and mill maintenance.

[0069] In summary, this application provides a precision calibration device 1 and a calibration method for the side roll equipment of an 18-roll reversible cold rolling mill. The calibration device 1 is equipped with advanced first displacement sensors 13, second displacement sensors 14, and a first pressure sensor 15, and a computer connected to these sensors performs precision calculations and adjusts and controls the position of the side rolls 94. This achieves rapid and accurate calibration of the side roll equipment's precision, as well as automated adjustment. This calibration method has advantages such as simple operation, high precision, and high degree of automation, and can be widely applied in the production of cold-rolled products, providing strong support for improving product quality and production efficiency.

[0070] The above description is merely a specific implementation of this application. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working process described above can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here. It should be understood that the protection scope of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the protection scope of this application.

Claims

1. A precision calibration device for the side rolls of a cold-rolling 18-roll reversible mill, characterized in that, At least one calibration device is provided, and the calibration device can be located at at least one of the upper and lower parts of the mill inlet and the upper and lower parts of the mill outlet, and the calibration device is located at both ends of the work roll of the mill along its own axial direction; the calibration device includes: The calibration frame is movable along a first direction; both ends of the calibration frame along the axial direction of the work roller are provided with side support blocks, which can move with the calibration frame under the drive of the driving device. The stand end block is installed on the stand of the rolling mill; the side support end block can contact the stand end block fixed to the rolling mill stand during the movement of the calibration frame, so as to transmit the displacement data and pressure data of the side roll equipment. The system comprises a first displacement sensor, a second displacement sensor, and a first pressure sensor. The first displacement sensor and the second displacement sensor are both mounted on the calibration frame. The first pressure sensor is located at the contact connection between the side support end block and the frame end block.

2. The accuracy calibration device for the side roll equipment of the 18-roll reversible cold rolling mill according to claim 1, characterized in that, Also includes: The limiting structure allows the calibration frame to be positioned on the lower base and / or upper base of the rolling mill, and to move between the lower base and the upper base in a first direction.

3. The accuracy calibration device for the side roll equipment of the 18-roll reversible cold rolling mill according to claim 2, characterized in that, The limiting structure is a guide rail, and the calibration frame is slidably connected in the guide rail.

4. The accuracy calibration device for the side roll equipment of the 18-roll reversible cold rolling mill according to claim 2, characterized in that, The upper base and the lower base are bolted together.

5. The accuracy calibration device for the side roll equipment of the 18-roll reversible cold rolling mill according to claim 1, characterized in that, The side support blocks are located at both ends of the calibration frame along its length and are connected to the calibration frame. The first displacement sensor and the second displacement sensor are located on the side support blocks.

6. The accuracy calibration device for the side roll equipment of the 18-roll reversible cold rolling mill according to claim 1, characterized in that, Also includes: Side support device, the side support device comprising: Side support base; A side-push hydraulic cylinder is disposed in the side support base; The side-push movable beam is connected to the side support base by the side-push hydraulic cylinder; The side roller is mounted on the side of the side push movable beam away from the side support base.

7. A method for calibrating the accuracy of side roll equipment in a cold-rolling 18-roll reversible mill, characterized in that, The calibration is performed based on the precision calibration device for the side roll equipment of the cold rolling 18-roll reversible mill as described in any one of claims 1-6, including: Install the calibration device on the rolling mill; The calibration frame is moved along the first direction by the drive device, so that the side support end block of the calibration frame is close to the end block of the frame. Displacement data is measured by the first displacement sensor and the second displacement sensor, and pressure data is measured by the first pressure sensor. The actual accuracy value of the side roller device is calculated based on the displacement and pressure data measured by the first displacement sensor, the second displacement sensor, and the first pressure sensor.

8. The method for calibrating the accuracy of the side roll equipment of the 18-roll reversible cold rolling mill according to claim 7, characterized in that, The actual accuracy value of the side roller device is calculated according to the displacement and pressure data measured by the first displacement sensor, the second displacement sensor, and the first pressure sensor using the following formula (1): （1）， In equation (1), Δ represents the side roller accuracy, and α i : Displacement value measured by displacement sensor, β i Theoretical displacement value (based on rolling mill geometry parameters); n For the number of measurement points; F 实际 : Actual pressure value measured by the pressure sensor; k The correction factor was determined experimentally, with a range of 0.05-0.

1. F 理论 The theoretical pressure value of the pressure sensor.

9. The method for calibrating the accuracy of the side roll equipment of an 18-roll reversible cold rolling mill according to claim 7, characterized in that, Also includes: Based on the preset accuracy requirements, determine whether the side roller equipment needs adjustment.

10. The method for calibrating the accuracy of the side roll equipment of an 18-roll reversible cold rolling mill according to claim 9, characterized in that, Also includes: If the actual accuracy value of the side roller equipment does not meet the preset requirements, the position of the side support device will be automatically adjusted so that the actual accuracy value of the side roller equipment meets the preset requirements.

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