A method and device for dynamically adjusting rolling elevation of a heavy plate mill, equipment and medium

Abstract

This application provides a method, apparatus, equipment, and medium for dynamically adjusting the rolling height of a thick plate rolling mill, belonging to the field of rolling mill control technology. The method includes: obtaining the actual diameter of the lower work roll of the thick plate rolling mill; determining a target rolling height adjustment strategy based on the actual lower work roll diameter; determining the target rolling height based on the target rolling height adjustment strategy; calculating the roll gap control extension based on the target rolling height to obtain the target roll gap control extension; repeatedly performing the dynamic rolling height adjustment operation until a preset stopping condition is met to obtain the rolling height adjustment result; adjusting the movement position of the roll gap control hydraulic cylinder based on the target roll gap control extension to adjust the rolling height; the preset stopping condition is that the absolute value of the rolling height deviation is less than a preset rolling height deviation threshold. The method, apparatus, equipment, and medium for dynamically adjusting the rolling height of a thick plate rolling mill provided in this application can improve the rolling height adjustment accuracy and increase the slab yield.

Description

Technical Field

[0001] This application belongs to the field of rolling mill control technology, and more specifically, relates to a method, device, equipment, and medium for dynamic adjustment of rolling elevation in a thick plate rolling mill. Background Technology

[0002] Rolling elevation refers to the vertical height of the rolling centerline of a heavy plate rolling mill relative to the reference plane of the mill stand. It directly determines the position and stress state of the rolled piece in the roll gap. In the production of heavy plates, the reasonable setting and stable control of the rolling elevation are of great significance for ensuring plate shape quality, reducing head and tail cutting losses, and extending equipment life.

[0003] As rolling continues, the diameters of the work rolls and support rolls gradually decrease due to periodic grinding, while other roll system components such as stepped pads and backing plates also experience varying degrees of wear. These changes cause the actual rolling elevation to gradually deviate from the initial set value, thus affecting rolling stability. To address these issues, existing heavy plate rolling mills typically employ a rolling elevation compensation method based on roll diameter measurement. This involves adjusting the stroke of the hydraulic roll gap control system according to the actual roll diameters of the work rolls and support rolls to compensate for elevation changes. However, existing rolling elevation adjustment strategies are relatively simplistic, usually relying solely on limited changes in the lower work roll diameter for fixed compensation. This approach fails to adequately consider the differentiated requirements for elevation adjustment across different roll diameter ranges, resulting in insufficient calibration accuracy under certain operating conditions.

[0004] Therefore, a dynamic adjustment method for rolling elevation is needed to improve the accuracy of rolling elevation adjustment. Summary of the Invention

[0005] The purpose of this application is to provide a method, apparatus, equipment, and medium for dynamically adjusting the rolling height of a thick plate rolling mill, which can improve the accuracy of rolling height adjustment and increase the yield of slabs. To achieve the above objective, the technical solution provided by this application is as follows: Firstly, a method for dynamically adjusting the rolling elevation of a thick plate rolling mill is provided, including: Obtain the actual roll diameter of the lower working roll of the heavy plate rolling mill, determine the target rolling elevation adjustment strategy based on the actual roll diameter of the lower working roll, and determine the target rolling elevation based on the target rolling elevation adjustment strategy; The roll gap control extension is calculated based on the target rolling elevation to obtain the target roll gap control extension. The rolling elevation dynamic adjustment operation is performed multiple times until the preset stopping condition is met, and the adjustment result of the rolling elevation is obtained. The steps for dynamically adjusting the rolling elevation include: Adjust the movement position of the roll gap control hydraulic cylinder based on the target roll gap extension amount to adjust the rolling elevation; Obtain the adjusted actual rolling elevation, and calculate the difference between the adjusted actual rolling elevation and the target rolling elevation as the rolling elevation deviation value; If the absolute value of the rolling elevation deviation is greater than or equal to the preset rolling elevation deviation threshold, the target roll gap control extension is adjusted based on the rolling elevation deviation value. The preset stopping condition is that the absolute value of the rolling elevation deviation is less than the preset rolling elevation deviation threshold.

[0006] Secondly, a dynamic adjustment device for the rolling elevation of a thick plate rolling mill is provided, comprising: The rolling elevation determination module is used to obtain the actual roll diameter of the lower working roll of the thick plate rolling mill, determine the target rolling elevation adjustment strategy based on the actual roll diameter of the lower working roll, and determine the target rolling elevation based on the target rolling elevation adjustment strategy. The extension calculation module is used to calculate the roll gap control extension based on the target rolling elevation, and obtain the target roll gap control extension. The rolling elevation dynamic adjustment module is used to perform rolling elevation dynamic adjustment operations multiple times until the preset stop condition is met, and obtain the rolling elevation adjustment result. The steps for dynamically adjusting the rolling elevation include: Adjust the movement position of the roll gap control hydraulic cylinder based on the target roll gap extension amount to adjust the rolling elevation; Obtain the adjusted actual rolling elevation, and calculate the difference between the adjusted actual rolling elevation and the target rolling elevation as the rolling elevation deviation value; If the absolute value of the rolling elevation deviation is greater than or equal to the preset rolling elevation deviation threshold, the target roll gap control extension is adjusted based on the rolling elevation deviation value. The preset stopping condition is that the absolute value of the rolling elevation deviation is less than the preset rolling elevation deviation threshold.

[0007] Thirdly, embodiments of this application also provide an electronic device, which includes a memory and a processor. The memory stores a computer program, and the processor executes the computer program to implement a method for dynamically adjusting the rolling elevation of a thick plate mill provided in any possible implementation of the first aspect.

[0008] Fourthly, embodiments of this application also provide a computer-readable storage medium storing a computer program that, when executed by a processor, implements a method for dynamically adjusting the rolling elevation of a thick plate mill provided by any possible implementation of the first aspect.

[0009] The beneficial effects of the technical solution provided in this application are as follows: This application provides a method, device, equipment, and medium for dynamic adjustment of rolling elevation in a thick plate rolling mill. Compared with related technologies, this application first determines an appropriate elevation adjustment strategy based on the actual diameter of the lower work roll, accurately determines the target rolling elevation under the corresponding working conditions, and then calculates the matching roll gap control extension based on the target rolling elevation. The precise adjustment of the rolling elevation is achieved through a roll gap control hydraulic cylinder. During the adjustment process, the actual rolling elevation is collected in real time and the deviation from the target rolling elevation is calculated. The roll gap control extension is cyclically corrected based on the deviation value, forming a closed-loop dynamic adjustment mechanism. This allows the actual rolling elevation to quickly approach and stabilize at the target value until the deviation meets the preset accuracy requirements. This application can fully adapt to elevation offsets caused by changes in the work roll diameter, improve the rolling elevation control accuracy and adjustment stability, avoid rolling fluctuations caused by deviations in the actual elevation from the set value, ensure stable plate shape quality, and reduce equipment wear caused by calibration deviations. This effectively improves the reliability and production efficiency of the rolling process, providing a reliable guarantee for stable rolling of thick plates. Therefore, the embodiments of this application can improve the accuracy of rolling height adjustment and increase the yield of slabs. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments of this application will be briefly introduced below.

[0011] Figure 1 A flowchart illustrating a method for dynamically adjusting the rolling elevation of a thick plate rolling mill, provided in an embodiment of this application; Figure 2 A structural block diagram of a dynamic adjustment device for rolling elevation of a thick plate rolling mill provided in this application embodiment; Figure 3 A schematic block diagram of an electronic device provided in an embodiment of this application. Detailed Implementation

[0012] The embodiments of this application are described below with reference to the accompanying drawings. It should be understood that the embodiments described below with reference to the accompanying drawings are exemplary descriptions for explaining the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions of the embodiments of this application.

[0013] Those skilled in the art will understand that, unless specifically stated otherwise, the singular forms “a,” “an,” “the,” and “the” used herein may also include the plural forms. It should be further understood that the terms “comprising” and “including” as used in embodiments of this application mean that the corresponding feature can be implemented as the presented feature, information, data, step, operation, element, and / or component, but do not exclude implementation as other features, information, data, step, operation, element, component, and / or combinations thereof supported by the art. It should be understood that when we say that an element is “connected” or “coupled” to another element, the one element can be directly connected or coupled to the other element, or it can mean that the one element and the other element establish a connection relationship through an intermediate element. Furthermore, “connected” or “coupled” as used herein can include wireless connection or wireless coupling. The term “and / or” as used herein indicates at least one of the items defined by the term; for example, “A and / or B” can be implemented as “A,” or as “B,” or as “A and B.” When describing multiple (two or more) items, if the relationship between the multiple items is not explicitly defined, the multiple items can refer to one, several or all of the multiple items. For example, the description of "parameter A includes A1, A2, A3" can be implemented as parameter A includes A1 or A2 or A3, or it can be implemented as parameter A includes at least two of the three items A1, A2 and A3.

[0014] To make the objectives, technical solutions, and advantages of this application clearer, the following description will be provided in conjunction with the accompanying drawings and specific embodiments.

[0015] This application provides a method for dynamically adjusting the rolling elevation of a thick plate rolling mill. This method can be executed by electronic equipment, such as... Figure 1 As shown, the method may include: S101: Obtain the actual roll diameter of the lower working roll of the heavy plate rolling mill, determine the target rolling elevation adjustment strategy based on the actual roll diameter of the lower working roll, and determine the target rolling elevation based on the target rolling elevation adjustment strategy.

[0016] In this embodiment, determining the target rolling elevation adjustment strategy based on the actual roll diameter of the lower work roll, and determining the target rolling elevation based on the target rolling elevation adjustment strategy, includes: In response to the actual diameter of the lower work roll being less than or equal to a first lower work roll diameter threshold, a first rolling height adjustment strategy is adopted as the target rolling height adjustment strategy. The first rolling height adjustment strategy is as follows: if the actual diameter of the upper work roll is greater than or equal to a first upper work roll diameter threshold, the target rolling height is adjusted to the first rolling height; if the actual diameter of the upper work roll is less than a first upper work roll diameter threshold, the target rolling height is adjusted to the second rolling height; the first rolling height is less than the second rolling height. In response to the actual diameter of the lower work roll being greater than the first lower work roll diameter threshold and less than or equal to the second lower work roll diameter threshold, the second rolling height adjustment strategy is adopted as the target rolling height adjustment strategy. The second rolling height adjustment strategy is as follows: if the actual diameter of the upper work roll is greater than or equal to the first upper work roll diameter threshold, the target rolling height is determined based on the lower work roll diameter; if the actual diameter of the upper work roll is less than the first upper work roll diameter threshold, the target rolling height is adjusted to the second rolling height.

[0017] In this embodiment, the thick plate rolling mill is used to produce steel plates with a thickness of 4.5 mm or more. The actual diameter of the lower work roll is the real-time diameter of the lower work roll during mill operation, in mm, for example, the actual diameter of the lower work roll is 1095 mm. The first lower work roll diameter threshold is the critical value for the lower work roll diameter that divides two elevation adjustment strategies, and the second lower work roll diameter threshold is the maximum diameter limit allowed for the lower work roll. The actual diameter of the upper work roll is the real-time diameter of the upper work roll during mill operation, and the first upper work roll diameter threshold is the critical value for determining whether the upper work roll meets the conventional elevation setting. The first rolling elevation is the reference rolling height adapted to large-diameter upper work rolls, and the second rolling elevation is the minimum safe rolling height adapted to small-diameter upper work rolls. The target rolling elevation is the optimal rolling centerline height under the current operating conditions.

[0018] Considering the differences in the optimal setting value of the rolling elevation under different roll diameters, and the coupled influence of the wear degree of the upper and lower work rolls, when the actual roll diameter of the upper work roll is small, its bending cylinder stroke is limited and cannot adapt to excessively low rolling elevations. Therefore, it is necessary to forcibly increase the elevation setting value (second rolling elevation). Specifically, for the case of a small roll diameter of the lower work roll (actual roll diameter of the lower work roll ≤ 1090 mm), due to limited self-compensation capabilities, a conservative static elevation strategy is adopted, setting the first or second rolling elevation according to whether the actual roll diameter of the upper work roll is less than the first upper work roll diameter threshold. For the case of a large roll diameter of the lower work roll (actual roll diameter of the lower work roll > 1090 mm and actual roll diameter of the lower work roll ≤ 1120 mm), the roll diameter is sufficient, and a dynamic adjustment strategy can be adopted: when the actual roll diameter of the upper work roll meets the standard, the target rolling elevation changes with the actual roll diameter of the lower work roll to optimize the bite conditions; when the actual roll diameter of the upper work roll is too small, it is also raised to the second rolling elevation. The above-mentioned segmented and conditional judgment strategy takes into account both equipment safety and process flexibility.

[0019] Furthermore, considering the risk of equipment collisions due to excessively high or low rolling heights, this embodiment sets a first rolling height as the lower limit and a third rolling height as the upper limit. When the target rolling height obtained from the above calculation process is less than the first rolling height, the first rolling height is taken as the final target rolling height; when the target rolling height obtained from the above calculation process is greater than the third rolling height, the third rolling height is taken as the final target rolling height.

[0020] For example, on a thick plate rolling mill, the actual diameter of the lower work roll is 1095mm, and the actual diameter of the upper work roll is 1025mm. Preset threshold values ​​for the first lower work roll diameter are 1090mm, the second lower work roll diameter threshold is 1120mm, and the first upper work roll diameter threshold is 1030mm. The first rolling elevation is 830mm, the second rolling elevation is 835mm, and the third rolling elevation is 845mm. It is determined that the actual diameter of the lower work roll (1095mm) is greater than 1090mm and less than 1120mm; therefore, the second rolling elevation adjustment strategy is used as the target rolling elevation adjustment strategy. Next, it is determined that the actual diameter of the upper work roll (1025mm) is less than 1030mm, satisfying the condition of being less than the first upper work roll diameter threshold and less than the third rolling elevation; therefore, the target rolling elevation is adjusted to the second rolling elevation, i.e., 835mm.

[0021] This embodiment improves the adaptability of rolling elevation by using an intelligent matching adjustment strategy for the diameters of the upper and lower work rolls, thus solving the problem of insufficient accuracy in fixed adjustment methods. Setting target rolling elevations by roll diameter zone can balance the stability of small roll diameters with the control effect of large roll diameters, while ensuring the safe stroke of the upper bending roll cylinder, avoiding calibration failure, improving the stability of the rolling process and the safety of the equipment, and optimizing the slab rolling quality.

[0022] In this embodiment, determining the target rolling elevation based on the lower work roll diameter specifically includes the following steps: The first step is to obtain the actual diameter of the lower work roll. Based on the actual diameter of the lower work roll, a preset mapping relationship between roll diameter and calculation coefficient is queried to obtain the calculation coefficient for the target rolling elevation. For example, a mapping table is stored in advance to record the calculation coefficient values ​​corresponding to different lower work roll diameter ranges: when the actual diameter of the lower work roll is 1120mm, the calculation coefficient is 0.5; when the actual diameter of the lower work roll is 1090mm, the calculation coefficient is 1.0; for the actual diameter of the lower work roll between the two, the corresponding calculation coefficient for the target rolling elevation is obtained by linear interpolation.

[0023] The second step is to obtain the preset reference rolling elevation. Then, perform a linear calculation between the reference rolling elevation and the target rolling elevation calculation coefficient to obtain the intermediate rolling elevation. For example, if the reference rolling elevation is 830mm, multiply the reference rolling elevation by the target rolling elevation calculation coefficient to obtain the intermediate rolling elevation; or use the formula: Intermediate rolling elevation = Reference rolling elevation + Target rolling elevation calculation coefficient × Roll diameter deviation, where the roll diameter deviation is the difference between the maximum lower work roll diameter and the actual lower work roll diameter.

[0024] The third step involves comparing the intermediate rolling elevation with the first and third rolling elevations: if the intermediate rolling elevation is greater than the third rolling elevation, the third rolling elevation is used as the verification pass indicator; if the intermediate rolling elevation is less than the first rolling elevation, the first rolling elevation is used as the verification pass indicator; if the intermediate rolling elevation is between the two, the intermediate rolling elevation itself is used as the verification pass indicator. This verification pass indicator is a numerical value, representing the rolling elevation value that remains within the safe range after the width limit.

[0025] The fourth step is to directly determine the final target rolling elevation data based on the verification pass mark data. This completes the process of determining the target rolling elevation from the actual diameter of the lower work roll.

[0026] This embodiment establishes a mapping relationship between roll diameter and calculation coefficients, supplemented by linear interpolation, to achieve continuous and smooth adjustment of the target rolling elevation according to the actual roll diameter of the lower work roll. This overcomes the accuracy problems caused by fixed compensation or segmented jumps in existing technologies. Simultaneously, a safety limit verification step is introduced to ensure that the calculated target rolling elevation always remains within the preset upper and lower limits, effectively preventing elevation exceedances due to abnormal roll diameter measurement or calculation deviations, and avoiding the risk of equipment collisions.

[0027] This embodiment determines the target rolling elevation through conditional branches within the strategy, automatically selecting a safe and optimized elevation value based on the actual wear condition of the upper work roll. When the actual diameter of the upper work roll is too small, a higher second rolling elevation is automatically adopted, avoiding equipment interference caused by insufficient stroke of the upper bending roll cylinder. When the actual diameter of the upper work roll is sufficient, the elevation is dynamically calculated to fully utilize the process flexibility under large roll diameter conditions. This embodiment is simple and reliable, requires no manual intervention, and improves the adaptability and accuracy of rolling elevation setting.

[0028] S102: Calculate the roll gap control extension based on the target rolling elevation to obtain the target roll gap control extension.

[0029] In this embodiment, the thick plate rolling mill also includes a lower support roll, a lower support roll pad, and a stepped pad. The lower support roll is used to support the lower work roll, and a stepped pad and a lower support roll pad are arranged sequentially between the bottom of the bearing seat of the frame and the lower support roll. The roll gap control extension is calculated based on the target rolling elevation to obtain the target roll gap control extension, including: Obtain the actual diameter of the lower support roller, the actual height of the stepped pad, and the actual thickness of the lower support roller pad; The compensation amount for the lower working roll diameter is calculated based on the preset maximum lower working roll diameter and the actual lower working roll diameter. The lower support roller radius compensation amount is calculated based on the preset maximum lower support roller diameter and the actual lower support roller diameter. The step height deviation value is calculated based on the preset reference step height and the actual height of the step. The thickness deviation of the lower support roller pad is calculated based on the preset reference lower support roller pad thickness and the actual thickness of the lower support roller pad. Determine the corresponding target roll gap control extension reference value based on the target rolling elevation; The target roll gap control extension is obtained by summing the compensation amount of the lower working roll diameter, the compensation amount of the lower support roll radius, the deviation value of the step pad height, the deviation value of the lower support roll pad thickness, and the reference value of the target roll gap control extension.

[0030] In this embodiment, the lower support roll is located below the lower work roll and is a roll component used to support the lower work roll and bear the rolling force. The lower support roll pad is a flat pad with different thicknesses, disposed between the bottom of the lower support roll bearing housing and the stepped pad, used for rough adjustment of the rolling line height. The stepped pad is a multi-stage stepped block disposed between the stand and the lower support roll pad, with each stage having a height difference of 15mm, used for discrete adjustment of the rolling line height. The stand is a fixed structural component of the rolling mill, used to install and support the rolls and auxiliary devices. The bottom of the bearing housing is the lower surface of the lower support roll bearing housing, in contact with the lower support roll pad. The maximum lower work roll diameter is the maximum allowable diameter value of the lower work roll design, for example, 1120mm, and the maximum lower support roll diameter is the maximum allowable diameter value of the lower support roll design, for example, 2200mm. The reference stepped pad height is the standard height of the stepped pad in its unworn state, for example, 205mm. The reference lower support roll pad thickness is the standard thickness of the lower support roll pad in its unworn state, for example, 165mm. The target roll gap control extension reference value is the hydraulic cylinder extension amount required to make the rolling line reach the target rolling elevation under ideal working conditions with maximum roll diameter and no wear.

[0031] The actual position of the rolling line elevation is determined by the vertical dimensions of multiple mechanical components, including the diameter of the lower work roll, the diameter of the lower support roll, the height of the step pad, the thickness of the lower support roll pad, and the extension of the hydraulic cylinder. When these components change due to grinding or replacement, the roll gap control extension must be compensated accordingly to ensure that the rolling line accurately reaches the target rolling elevation.

[0032] Specifically, a reduction in the diameter of the lower work roll causes the rolling line to descend, requiring the hydraulic cylinder to extend further to compensate, corresponding to the lower work roll diameter compensation amount. A reduction in the radius of the lower support roll also causes the rolling line to descend, requiring compensation, corresponding to the lower support roll radius compensation amount. Wear and tear on the stepped pads and lower support roll pads reduces their actual height, also causing the rolling line to descend, requiring additional hydraulic cylinder extension for compensation, corresponding to the stepped pad height deviation and the lower support roll pad thickness deviation. Adding these compensation amounts to the baseline extension amount yields the actual extension amount required by the hydraulic cylinder under the current operating conditions. This compensation method achieves precise quantitative compensation for roll diameter wear and pad wear.

[0033] The formula for calculating the target roll gap control extension is: ; ; ; in, The maximum diameter of the lower working roll. This is the actual diameter of the lower working roll. The maximum lower support roller diameter, This is the actual diameter of the lower support roller. For the height deviation of the step pad, This refers to the thickness deviation of the lower support roller pad. The target roll gap control extension reference value; This refers to the actual height of the step mat. The base step height, This refers to the actual thickness of the lower support roller pad. The thickness of the support roller pad is used as a reference.

[0034] For example, the target rolling elevation has been determined to be 835 mm. The target roll gap control extension is then calculated using the following steps: obtaining the actual diameter of the lower support roll, the actual height of the step pad, and the actual thickness of the lower support roll pad. In this embodiment, the actual diameter of the lower support roll is 2183.5 mm. The operator uses a feeler gauge or displacement sensor to measure the current height of the step pad; for example, if the actual height of the step pad due to wear is detected to be 204 mm. The actual thickness of the lower support roll pad is measured using vernier calipers; in this embodiment, a pad with a thickness of 190mm is selected. The lower work roll diameter compensation is calculated based on the preset maximum lower work roll diameter of 1120mm and the actual lower work roll diameter of 1095mm, resulting in a compensation of 25mm. The lower support roll radius compensation is calculated based on the preset maximum lower support roll diameter of 2200mm and the actual lower support roll diameter of 2183.5mm, resulting in a compensation of 8.25mm. The step height deviation is calculated based on the preset reference step height of 205mm and the actual step height of 204mm, resulting in a deviation of 1mm. The lower support roll pad thickness deviation is calculated based on the preset reference lower support roll pad thickness of 165mm and the actual lower support roll pad thickness of 190mm, resulting in a deviation of -25mm (because the actual thickness is greater than the reference thickness, indicating that the pad is thicker and the hydraulic cylinder needs to extend less). The target roll gap control extension reference value is determined based on the target rolling elevation of 835mm. The pre-stored correspondence table is consulted, and the baseline value corresponding to the 835mm elevation is 30mm. The following values ​​are summed: lower working roll diameter compensation of 25mm, lower support roll radius compensation of 8.25mm, stepped pad height deviation of 1mm, lower support roll pad thickness deviation of -25mm, and the target roll gap control extension baseline value of 30mm, yielding a target roll gap control extension of 39.25mm. This value is sent to the hydraulic servo controller to drive the hydraulic cylinder movement.

[0035] This embodiment achieves quantitative compensation for wear and diameter variations in the roll system components by separately calculating the compensation amounts for the lower work roll diameter, the lower support roll radius, the step pad height deviation, and the lower support roll pad thickness deviation, and then summing these compensation amounts with the reference extension amount. This technical solution significantly improves the calculation accuracy of the hydraulic cylinder extension amount, ensuring that the rolling line can accurately reach the target elevation and avoiding elevation deviations and equipment safety hazards caused by incomplete compensation.

[0036] In this embodiment, the thick plate rolling mill also includes an arc pad, which is located between the lower support roll pad and the bearing seat of the lower support roll; A method for dynamically adjusting the rolling elevation of a thick plate rolling mill, further comprising: Obtain the actual height of the arc pad; The deviation value of the arc pad is obtained by calculating based on the preset reference arc pad height and the actual height of the arc pad; If the arc pad deviation value is greater than or equal to the preset arc pad deviation threshold, the target roll gap control extension reference value is compensated based on the arc pad deviation value to obtain the compensated roll gap control extension reference value. The target roll gap control extension is obtained by summing the lower work roll diameter compensation, lower support roll radius compensation, stepped pad height deviation, lower support roll pad thickness deviation, and target roll gap control extension reference value, including: The target roll gap control extension is obtained by summing the compensation amount of the lower working roll diameter, the compensation amount of the lower support roll radius, the deviation value of the step pad height, the deviation value of the lower support roll pad thickness, and the benchmark value of the compensated roll gap control extension.

[0037] In this embodiment, the arc-shaped pad is an arc-shaped pad block disposed between the lower support roll pad and the lower support roll bearing seat. Its supporting surface is arc-shaped, used for automatic centering, uniform distribution of rolling force, and absorption of installation errors. The actual height of the arc-shaped pad is the current true thickness value of the arc-shaped pad obtained by measuring tools (such as vernier calipers or displacement sensors), in mm. The reference arc-shaped pad height is the standard thickness of the arc-shaped pad in its unworn state, for example, 245 mm or 150 mm, depending on the selected arc-shaped pad specifications.

[0038] Considering that the arc pad is located at a critical position in the force transmission path and is subjected to alternating rolling forces for a long time, its wear rate is relatively fast (e.g., 4 to 5 mm per month). However, the wear of the arc pad is difficult to measure online in real time, and usually requires shutdown for inspection. If the elevation is found to have deviated significantly by the time of inspection, there is a safety hazard. Therefore, a threshold-triggered compensation mechanism is introduced: the original reference value is still used to calculate the extension amount under normal circumstances. Once the periodic inspection finds that the arc pad deviation value reaches the preset arc pad deviation threshold (e.g., 2 mm), the roll gap control extension amount reference value is automatically compensated in one go, and the wear amount is included in the subsequent extension amount calculation. This compensation does not change other compensation items (such as roll diameter compensation, stepped pad deviation, etc.), but only adds the arc pad wear amount to the roll gap control extension amount reference value. The compensated roll gap control extension amount reference value replaces the original reference value in the summation, thereby offsetting the elevation drop caused by the wear of the arc pad.

[0039] For example, the compensation process for the arc pad is as follows: The first step is to obtain the actual height of the arc pad. Every two weeks, the operator uses a depth caliper to measure the thickness of the arc pad during roller changes or maintenance. In this embodiment, the arc pad specification is 245mm, and the actual measured height after three months of use is 241mm.

[0040] The second step involves calculating the arc pad deviation value as 4mm based on the preset reference arc pad height of 245mm and the actual arc pad height of 241mm.

[0041] The third step is to compare the arc pad deviation value of 4mm with the preset arc pad deviation threshold of 2mm. Since 4mm is greater than 2mm, the compensation trigger condition is met.

[0042] The fourth step is to compensate the target roll gap control extension reference value based on the arc pad deviation value to obtain the compensated roll gap control extension reference value. The original target roll gap control extension reference value is 30mm (corresponding to a target rolling elevation of 835mm). In this embodiment, the arc pad deviation value of 4mm is multiplied by a preset compensation coefficient of 0.5 (empirical value) and then added to the original reference value, that is, 30mm plus 2mm equals 32mm, to obtain the compensated roll gap control extension reference value of 32mm.

[0043] The fifth step involves summing the compensation amounts: the lower work roll diameter (25mm), the lower support roll radius (8.25mm), the step pad height deviation (1mm), and the lower support roll pad thickness deviation (-25mm), with the compensated roll gap control extension baseline value of 32mm. This yields the target roll gap control extension of 41.25mm. This embodiment extends the continuous running time of the rolling mill and reduces the number of equipment adjustments required due to elevation deviations.

[0044] S103: Perform the rolling elevation dynamic adjustment operation multiple times until the preset stop condition is met, and obtain the rolling elevation adjustment result.

[0045] The steps for dynamically adjusting the rolling elevation include: Adjust the movement position of the roll gap control hydraulic cylinder based on the target roll gap extension amount to adjust the rolling elevation; Obtain the adjusted actual rolling elevation, and calculate the difference between the adjusted actual rolling elevation and the target rolling elevation as the rolling elevation deviation value; If the absolute value of the rolling elevation deviation is greater than or equal to the preset rolling elevation deviation threshold, the target roll gap control extension is adjusted based on the rolling elevation deviation value. The preset stopping condition is that the absolute value of the rolling elevation deviation is less than the preset rolling elevation deviation threshold.

[0046] In this embodiment, based on the target roll gap extension amount, the piston rod of the hydraulic cylinder can be extended or retracted to a specified position according to the target roll gap extension amount. Considering that a one-time open-loop compensation cannot eliminate the residual deviation between the actual elevation and the target elevation caused by interference factors such as mechanical backlash, hydraulic nonlinearity, and measurement noise, this embodiment introduces a closed-loop iterative mechanism: after each adjustment, the actual rolling elevation is measured, the rolling elevation deviation value is calculated, and if the absolute value of the rolling elevation deviation value is greater than or equal to the preset rolling elevation deviation threshold, the target extension amount is actively corrected according to the rolling elevation deviation value, and then the adjustment is performed again.

[0047] The above process uses the actual effect of the adjustment as feedback to correct the next input command, gradually bringing the actual rolling elevation closer to the target rolling elevation. The magnitude of each correction is related to the rolling elevation deviation value; the larger the rolling elevation deviation value, the larger the correction amount, ensuring rapid convergence; the smaller the rolling elevation deviation value, the smaller the correction amount, avoiding overshoot. The preset stopping condition is that the absolute value of the rolling elevation deviation value is less than the preset rolling elevation deviation threshold. At this point, the rolling elevation is considered to meet the accuracy requirements, and iteration stops. This mechanism transforms the rolling elevation adjustment from open-loop control to closed-loop control, improving the final positioning accuracy and automatically adapting to the interference characteristics under different working conditions.

[0048] For example, in this embodiment, the initial calculation of the target roll gap control extension amount has been completed, for example, the target roll gap control extension amount is 39.25mm, the preset rolling elevation deviation threshold is 0.3mm, and then multiple rolling elevation dynamic adjustment operations are started.

[0049] The first dynamic adjustment of the rolling height is as follows: Based on the initial target roll gap control extension of 39.25mm, the piston rod of the roll gap control hydraulic cylinder is extended to this position. The magnetostrictive displacement sensor built into the hydraulic cylinder provides real-time feedback of the position signal to ensure precise positioning. After adjustment, the laser rangefinder installed on the mill exit side measures the height of the upper surface of the lower work roll relative to the reference plane of the stand, obtaining the adjusted actual rolling height as 834.6mm. The target rolling height is 835mm. The difference between the adjusted actual rolling height and the target rolling height is calculated, yielding a rolling height deviation of -0.4mm. The absolute value of -0.4mm is compared with the preset rolling height deviation threshold of 0.3mm. Since 0.4mm is greater than 0.3mm, the correction condition is met. Based on the rolling height deviation value of -0.4mm, the target roll gap control extension is corrected by increasing the original 39.25mm by 0.4mm (due to the actual deviation being lower, more extension is needed), resulting in a corrected target roll gap control extension of 39.65mm.

[0050] The second dynamic adjustment of the rolling height: Based on the corrected target roll gap control extension of 39.65mm, the hydraulic cylinder position was adjusted again. After adjustment, the actual measured rolling height was 834.9mm, with a deviation of -0.1mm from the target rolling height of 835mm. The absolute value of -0.1mm is less than the preset rolling height deviation threshold of 0.3mm, meeting the preset stop condition, and the dynamic adjustment of the rolling height is completed. At this point, the error between the actual rolling height and the target rolling height is within the allowable range, and the subsequent rolling process can proceed.

[0051] This embodiment achieves a high-precision, automated, dynamic adjustment of the rolling height by repeatedly performing closed-loop adjustment operations involving measurement, comparison, and correction. This allows the actual rolling height to gradually converge to the allowable deviation range of the target rolling height, overcoming the residual error inherent in open-loop compensation. Compared to existing technologies that set the height once and then re-verify, this embodiment automatically eliminates positioning deviations caused by mechanical backlash, hydraulic nonlinearity, and other factors, improving the accuracy of the rolling height setting. Simultaneously, it avoids the inefficiency of repeated manual measurement and correction, achieving high-precision, automated, and dynamic adjustment of the rolling height.

[0052] As can be seen from the above, the embodiments of this application first determine the appropriate elevation adjustment strategy based on the actual diameter of the lower work roll, accurately determine the target rolling elevation under the corresponding working conditions, and then calculate the matching roll gap control extension based on the target rolling elevation. The precise adjustment of the rolling elevation is achieved through the roll gap control hydraulic cylinder. During the adjustment process, the actual rolling elevation is collected in real time and the deviation from the target rolling elevation is calculated. The roll gap control extension is cyclically corrected based on the deviation value, forming a closed-loop dynamic adjustment mechanism. This allows the actual rolling elevation to quickly approach and stabilize at the target value until the deviation meets the preset accuracy requirements. The embodiments of this application can fully adapt to elevation offsets caused by changes in the work roll diameter, improve the rolling elevation control accuracy and adjustment stability, avoid rolling fluctuations caused by deviations in the actual elevation from the set value, ensure stable plate shape quality, and reduce equipment wear caused by calibration deviations. This effectively improves the reliability and production efficiency of the rolling process, providing a reliable guarantee for stable rolling of thick plates. Therefore, the embodiments of this application can improve the rolling elevation adjustment accuracy and increase the slab yield.

[0053] In one embodiment of this application, a method for dynamically adjusting the rolling elevation of a thick plate rolling mill further includes: Before performing the dynamic adjustment operation of the rolling elevation, the target rolling elevation and the plane shape control parameter mapping table are searched based on the target rolling elevation to obtain the target plane shape control parameters. The groove depth is adjusted based on the target planar shape control parameters to optimize the planar shape of the slab to be rolled.

[0054] In this embodiment, before adjusting the trench depth based on the target planar shape control parameters, the following steps are also included: Obtain the bite speed and rolling speed; If the bite speed is less than the preset speed threshold and the rolling speed is greater than or equal to the preset speed threshold, then the bite speed will be adjusted to the preset speed threshold. If the bite speed is greater than or equal to the preset speed threshold and the rolling speed is less than the preset speed threshold, then the rolling speed will be adjusted to the preset speed threshold. If the bite speed is less than the preset speed threshold and the rolling speed is less than the preset speed threshold, then both the bite speed and the rolling speed should be adjusted to the preset speed threshold first. If both the bite speed and the rolling speed are greater than or equal to the preset speed threshold, no adjustment will be made.

[0055] In this embodiment, the target rolling elevation and planar shape control parameter mapping table is a pre-stored correspondence table that records the optimal planar shape control parameters matched for different target rolling elevation values. For example, a target rolling elevation of 835mm corresponds to a groove depth of -10mm. The target planar shape control parameters are parameter values ​​obtained by looking up a table to control the planar shape of the slab, such as the groove depth. Adjusting the groove depth means changing the preset groove depth value at the head of the slab in the Plan View Pattern Control (PVPC) process. Optimizing the planar shape of the slab to be rolled means improving the geometry of the slab head and reducing head and tail cutting losses. The bite speed is the conveying speed of the slab front end when it enters the roll gap, in m / s. The rolling speed is the stable operating speed of the slab during the rolling process. The preset speed threshold is a pre-set minimum allowable speed value, such as 1.1m / s. Adjusting to the preset speed threshold means increasing the actual speed to the preset speed threshold by controlling the speed of the main drive motor or roller conveyor.

[0056] Considering the coupling relationship between the groove depth and rolling speed in the PVPC process, if the speed is too low, the groove cannot be effectively formed, and it may even lead to difficulties in slab biting; if the speed is too high, the groove may be too deep, affecting rolling stability. In the prior art, operators often only adjust the groove depth while ignoring speed matching, resulting in poor actual results. Therefore, this embodiment first performs a mandatory verification of the biting speed and rolling speed before adjusting the groove depth. By comparing the two speeds with a preset speed threshold (e.g., 1.1 m / s), speeds below the preset speed threshold are actively adjusted to the preset speed threshold to ensure that the speed meets the minimum requirements of the PVPC process. This pre-emptive speed constraint processing allows subsequent groove depth adjustments to be performed in a safe and stable speed environment, thereby ensuring the actual effect of the PVPC process.

[0057] For example, the target rolling elevation has been set to 835 mm. Before starting multiple dynamic rolling elevation adjustments, the planar shape control parameters and speed are first set and verified.

[0058] The first step is to look up a pre-defined mapping table between the target rolling elevation of 835mm and the planar shape control parameters. This mapping table is pre-compiled by process engineers based on a large amount of rolling test data. For example, the table records that a target rolling elevation of 830mm corresponds to a groove depth of -8mm, 835mm corresponds to a groove depth of -10mm, and 840mm corresponds to a groove depth of -12mm. In this embodiment, the target planar shape control parameter obtained from the table is a groove depth of -10mm.

[0059] The second step involves obtaining the bite speed and rolling speed before adjusting the slot depth based on the target planar shape control parameters. The bite speed is 0.9 m / s, and the rolling speed is 1.2 m / s. The preset speed threshold is 1.1 m / s.

[0060] The third step involves conditional judgment: the bite speed (0.9 m / s) is less than 1.1 m / s, and the rolling speed (1.2 m / s) is greater than 1.1 m / s, satisfying the branch "bite speed less than the preset speed threshold, and rolling speed greater than or equal to the preset speed threshold". The bite speed is then adjusted from 0.9 m / s to 1.1 m / s. The rolling speed remains unchanged.

[0061] Fourth, after speed adjustment, the grooving depth is adjusted based on the target planar shape control parameters. The roll pressing position is controlled by the PVPC hydraulic servo system to create a groove with a preset depth of -10mm at the slab head. At this point, both the bite speed and rolling speed meet the requirement of not less than 1.1m / s, allowing the grooving process to be performed at a stable speed, effectively improving the slab head shape.

[0062] This embodiment ensures that the speed during PVPC process execution is not lower than the preset speed threshold by forcibly verifying and adjusting the bite speed and rolling speed before adjusting the groove depth, thus avoiding poor groove forming or bite failure due to excessively low speed. This pre-processing of speed, combined with the adjustment of groove depth, makes the optimization effect of slab planar shape more stable and reliable, while reducing manual intervention and improving the automation level of the rolling process.

[0063] In one embodiment of this application, a method for dynamically adjusting the rolling elevation of a thick plate rolling mill further includes: Obtain the actual rolling elevation and the actual diameter of the lower work roll; Determine whether the over-limit conditions are met based on the actual rolling elevation and the actual roll diameter of the lower work roll. If the conditions for exceeding the limit are met, an alarm signal and a rolling stop signal will be triggered. The conditions for exceeding the limit are:

[0064] in, This is the actual rolling elevation. This is the actual diameter of the lower working roll.

[0065] In this embodiment, the over-limit condition is used to determine whether the relationship between the actual rolling elevation and the actual diameter of the lower work roll exceeds the inequality of the equipment's safety boundary. The alarm signal is an audible and visual warning or interface prompt issued by the alarm device when the over-limit condition is met, used to warn operators. The rolling stop signal is a command that triggers an emergency stop of the rolling mill, causing the main drive motor and roller conveyor to stop operating immediately.

[0066] The safety distance between the work roll and the track is a rigid constraint ensuring the normal operation of the equipment. This safety distance is determined by the rolling elevation, the radius of the lower work roll, and fixed dimensional parameters. The derived inequality... This is equivalent to a safety distance ≥ 10mm. When the actual rolling elevation is too low or the actual diameter of the lower work roll is too small, the value on the left side of the inequality will decrease. Once it is less than -530, it means that the safety distance is less than 10mm, posing a risk of contact and collision between the roller and the track. Therefore, the inverse of this inequality is taken as the condition for exceeding the limit: This embodiment monitors the actual rolling elevation and the actual diameter of the lower work roll in real time. Once the conditions for exceeding the limits are met, an alarm signal and a rolling stop signal are immediately triggered, forcibly stopping the rolling process. This formula-based real-time safety interlocking mechanism can proactively intervene before danger occurs, avoiding equipment accidents caused by incorrect elevation settings or abnormal roll diameters.

[0067] For example, safety interlock monitoring is performed in real time during the rolling process, and the specific steps are as follows: The first step is to obtain the actual rolling elevation. A laser displacement sensor installed on the mill exit side continuously measures the height of the upper surface of the lower work roll relative to the stand reference plane. The measurement signal is transmitted to the programmable logic controller (PLC) via an analog input module at a frequency of once per millisecond. In this embodiment, the actual rolling elevation obtained at a certain moment is 832 mm.

[0068] The second step is to obtain the actual diameter of the lower working roll, which is 1090mm.

[0069] The third step is to calculate the left-hand side value of the over-limit condition expression based on the actual rolling elevation of 832mm and the actual roll diameter of the lower work roll of 1090mm, which is equal to -523.

[0070] The fourth step is to compare the calculated -523 with -530. Determine if -523 is less than -530. Since -523 is greater than -530, the over-limit condition is not met, no alarm is triggered, and the rolling mill continues to operate normally.

[0071] Suppose that due to an operational error, the target rolling elevation is incorrectly set to 800mm, the actual diameter of the lower work roll is 1050mm, and the measured actual rolling elevation is 798mm. The left-hand side of the over-limit condition expression equals -537. -537 is less than -530, thus meeting the over-limit condition, immediately triggering an alarm signal. A flashing red warning message "Insufficient rolling elevation safety distance" is displayed on the human-machine interface, and a rolling stop signal is simultaneously issued, cutting off the power to the main drive motor and the roller conveyor drive, causing the mill to stop urgently and preventing a collision between the rollers and the track.

[0072] This embodiment achieves real-time online monitoring of the safe distance between the work roll and the track by introducing an over-limit condition judgment based on the actual rolling elevation and the actual diameter of the lower work roll. Once the calculated value falls below the safety threshold, an alarm signal and a rolling stop signal are immediately triggered, proactively intervening before an accident occurs. This embodiment can promptly detect safety hazards caused by incorrect elevation settings or abnormal roll diameters, effectively preventing equipment collisions and ensuring the long-term safety and reliability of the rolling mill.

[0073] Based on the same principle as the dynamic adjustment method for rolling elevation of a thick plate rolling mill provided in the embodiments of this application, the embodiments of this application also provide a dynamic adjustment device for rolling elevation of a thick plate rolling mill, such as... Figure 2 As shown, the dynamic adjustment device 20 for rolling height of a thick plate rolling mill may specifically include: a rolling height determination module 21, an extension calculation module 22, and a dynamic adjustment module 23 for rolling height.

[0074] Among them, the rolling elevation determination module 21 is used to obtain the actual roll diameter of the lower working roll of the thick plate rolling mill, determine the target rolling elevation adjustment strategy based on the actual roll diameter of the lower working roll, and determine the target rolling elevation based on the target rolling elevation adjustment strategy. The extension calculation module 22 is used to calculate the roll gap control extension based on the target rolling elevation to obtain the target roll gap control extension. The rolling elevation dynamic adjustment module 23 is used to perform the rolling elevation dynamic adjustment operation multiple times until the preset stop condition is met, and obtain the rolling elevation adjustment result. The steps for dynamically adjusting the rolling elevation include: Adjust the movement position of the roll gap control hydraulic cylinder based on the target roll gap extension amount to adjust the rolling elevation; Obtain the adjusted actual rolling elevation, and calculate the difference between the adjusted actual rolling elevation and the target rolling elevation as the rolling elevation deviation value; If the absolute value of the rolling elevation deviation is greater than or equal to the preset rolling elevation deviation threshold, the target roll gap control extension is adjusted based on the rolling elevation deviation value. The preset stopping condition is that the absolute value of the rolling elevation deviation is less than the preset rolling elevation deviation threshold.

[0075] In one embodiment of this application, a dynamic adjustment device 20 for the rolling elevation of a thick plate rolling mill further includes: The process co-optimization module is used to find the target rolling elevation and planar shape control parameter mapping table based on the target rolling elevation before performing the dynamic adjustment operation of the rolling elevation, and obtain the target planar shape control parameters. The groove depth is adjusted based on the target planar shape control parameters to optimize the planar shape of the slab to be rolled.

[0076] In one embodiment of this application, the rolling elevation determination module 21 is specifically used for: In response to the actual diameter of the lower work roll being less than or equal to a first lower work roll diameter threshold, a first rolling height adjustment strategy is adopted as the target rolling height adjustment strategy. The first rolling height adjustment strategy is as follows: if the actual diameter of the upper work roll is greater than or equal to a first upper work roll diameter threshold, the target rolling height is adjusted to the first rolling height; if the actual diameter of the upper work roll is less than a first upper work roll diameter threshold, the target rolling height is adjusted to the second rolling height; the first rolling height is less than the second rolling height. In response to the actual diameter of the lower work roll being greater than the first lower work roll diameter threshold and less than or equal to the second lower work roll diameter threshold, the second rolling height adjustment strategy is adopted as the target rolling height adjustment strategy. The second rolling height adjustment strategy is as follows: if the actual diameter of the upper work roll is greater than or equal to the first upper work roll diameter threshold, the target rolling height is determined based on the lower work roll diameter; if the actual diameter of the upper work roll is less than the first upper work roll diameter threshold, the target rolling height is adjusted to the second rolling height.

[0077] In one embodiment of this application, the thick plate rolling mill further includes a lower support roll, a lower support roll pad, and a stepped pad. The lower support roll is used to support the lower work roll, and the stepped pad and the lower support roll pad are arranged sequentially between the bottom of the bearing seat of the frame and the lower support roll. The extension calculation module 22 is specifically used for: Obtain the actual diameter of the lower support roller, the actual height of the stepped pad, and the actual thickness of the lower support roller pad; The compensation amount for the lower working roll diameter is calculated based on the preset maximum lower working roll diameter and the actual lower working roll diameter. The lower support roller radius compensation amount is calculated based on the preset maximum lower support roller diameter and the actual lower support roller diameter. The step height deviation value is calculated based on the preset reference step height and the actual height of the step. The thickness deviation of the lower support roller pad is calculated based on the preset reference lower support roller pad thickness and the actual thickness of the lower support roller pad. Determine the corresponding target roll gap control extension reference value based on the target rolling elevation; The target roll gap control extension is obtained by summing the compensation amount of the lower working roll diameter, the compensation amount of the lower support roll radius, the deviation value of the step pad height, the deviation value of the lower support roll pad thickness, and the reference value of the target roll gap control extension.

[0078] In one embodiment of this application, the thick plate rolling mill further includes an arc pad, which is located between the lower support roll pad and the bearing seat of the lower support roll; A dynamic adjustment device 20 for rolling elevation of a thick plate rolling mill further includes: The wear compensation module is used to obtain the actual height of the arc pad; The deviation value of the arc pad is obtained by calculating based on the preset reference arc pad height and the actual height of the arc pad; If the arc pad deviation value is greater than or equal to the preset arc pad deviation threshold, the target roll gap control extension reference value is compensated based on the arc pad deviation value to obtain the compensated roll gap control extension reference value. The extension calculation module 22 is also specifically used for: The target roll gap control extension is obtained by summing the compensation amount of the lower working roll diameter, the compensation amount of the lower support roll radius, the deviation value of the step pad height, the deviation value of the lower support roll pad thickness, and the benchmark value of the compensated roll gap control extension.

[0079] In one embodiment of this application, a dynamic adjustment device 20 for the rolling elevation of a thick plate rolling mill further includes: The speed adjustment module is used to obtain the bite speed and rolling speed; If the bite speed is less than the preset speed threshold and the rolling speed is greater than or equal to the preset speed threshold, then the bite speed will be adjusted to the preset speed threshold. If the bite speed is greater than or equal to the preset speed threshold and the rolling speed is less than the preset speed threshold, then the rolling speed will be adjusted to the preset speed threshold. If the bite speed is less than the preset speed threshold and the rolling speed is less than the preset speed threshold, then both the bite speed and the rolling speed should be adjusted to the preset speed threshold first. If both the bite speed and the rolling speed are greater than or equal to the preset speed threshold, no adjustment will be made.

[0080] In one embodiment of this application, a dynamic adjustment device 20 for the rolling elevation of a thick plate rolling mill further includes: The safety interlock module is used to obtain the actual rolling elevation and the actual diameter of the lower work roll; Determine whether the over-limit conditions are met based on the actual rolling elevation and the actual roll diameter of the lower work roll. If the conditions for exceeding the limit are met, an alarm signal and a rolling stop signal will be triggered. The conditions for exceeding the limit are:

[0081] in, This is the actual rolling elevation. This is the actual diameter of the lower working roll.

[0082] The apparatus in this application embodiment can execute the method provided in this application embodiment, and the implementation principle is similar. The actions performed by each module in the apparatus of each embodiment of this application correspond to the steps in the method of each embodiment of this application. For detailed functional descriptions of each module of the apparatus, please refer to the descriptions in the corresponding methods shown above, which will not be repeated here.

[0083] Figure 3 A schematic diagram of the structure of an electronic device to which this application embodiment applies is shown, such as... Figure 3 As shown, the electronic device can be used to implement the methods provided in any embodiment of this application.

[0084] like Figure 3 As shown, the electronic device 300 may primarily include at least one processor 301. Figure 3 The diagram shows components such as a memory 302, a communication module 303, and an input / output interface 304. Optionally, these components can be connected and communicate with each other via a bus 305. It should be noted that... Figure 3 The structure of the electronic device 300 shown is merely illustrative and does not constitute a limitation on the electronic devices to which the methods provided in the embodiments of this application are applicable.

[0085] The memory 302 can be used to store operating systems and applications, etc. The applications can include computer programs that implement the methods shown in the embodiments of this application when invoked by the processor 301, and can also include programs for implementing other functions or services. The memory 302 can be ROM (Read Only Memory) or other types of static storage devices that can store static information and instructions, RAM (Random Access Memory) or other types of dynamic storage devices that can store information and computer programs, or it can be EEPROM (Electrically Erasable Programmable Read Only Memory), CD-ROM (Compact Disc Read Only Memory) or other optical disc storage, optical disc storage (including compressed optical discs, laser discs, optical discs, digital universal optical discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited thereto.

[0086] Processor 301 is connected to memory 302 via bus 305 and implements corresponding functions by calling the application programs stored in memory 302. Processor 301 can be a CPU (Central Processing Unit), a general-purpose processor, a DSP (Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It can implement or execute the various exemplary logic blocks, modules, and circuits described in conjunction with the disclosure of this application. Processor 301 can also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, etc.

[0087] Electronic device 300 can connect to a network via communication module 303 (which may include, but is not limited to, components such as a network interface) to communicate with other devices (such as user terminals or servers) through the network and achieve data interaction, such as sending data to or receiving data from other devices. Communication module 303 may include wired network interfaces and / or wireless network interfaces, meaning the communication module may include at least one of wired or wireless communication modules.

[0088] The electronic device 300 can connect to necessary input / output devices, such as a keyboard and display device, via the input / output interface 304. The electronic device 300 itself may have a display device, and other external display devices can also be connected via the input / output interface 304. Optionally, a storage device, such as a hard drive, can also be connected via the input / output interface 304 to store data from the electronic device 300, retrieve data from the storage device, or store data from the storage device in the memory 302. It is understood that the input / output interface 304 can be a wired interface or a wireless interface. Depending on the actual application scenario, the device connected to the input / output interface 304 can be a component of the electronic device 300 or an external device connected to the electronic device 300 when needed.

[0089] The bus 305 used to connect the components may include a path for transmitting information between the components. The bus 305 may be a PCI (Peripheral Component Interconnect) bus or an EISA (Extended Industry Standard Architecture) bus, etc. Depending on its function, the bus 305 may be divided into an address bus, a data bus, a control bus, etc.

[0090] Optionally, for the solution provided in the embodiments of this application, the memory 302 can be used to store a computer program that executes the solution of this application, and the processor 301 runs the computer program. When the processor 301 runs the computer program, it implements the operation of the method or apparatus provided in the embodiments of this application.

[0091] Based on the same principle as the method provided in the embodiments of this application, the embodiments of this application provide a computer-readable storage medium storing a computer program, which, when executed by a processor, can implement the corresponding content of the aforementioned method embodiments.

[0092] It should be noted that the terms "first," "second," "third," "fourth," "1," "2," etc. (if present) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in a sequence other than that shown in the figures or text.

[0093] In the embodiments of this application, the terms "module" or "unit" refer to a computer program or part of a computer program that has a predetermined function and works with other related parts to achieve a predetermined goal, and can be implemented wholly or partially using software, hardware (such as processing circuitry or memory), or a combination thereof. Similarly, a processor (or multiple processors or memory) can be used to implement one or more modules or units. Furthermore, each module or unit can be part of an overall module or unit that includes the functionality of that module or unit.

[0094] It should be understood that although arrows indicate various operation steps in the flowcharts of this application's embodiments, the order in which these steps are implemented is not limited to the order indicated by the arrows. Unless explicitly stated herein, in some implementation scenarios of this application's embodiments, the implementation steps in each flowchart can be executed in other orders as required. Furthermore, some or all steps in each flowchart, based on the actual implementation scenario, may include multiple sub-steps or multiple stages. Some or all of these sub-steps or stages can be executed at the same time, and each sub-step or stage can also be executed at different times. In scenarios where execution times differ, the execution order of these sub-steps or stages can be flexibly configured according to requirements, and this application's embodiments do not limit this.

[0095] The above description is only an optional implementation method for some implementation scenarios of this application. It should be noted that for those skilled in the art, other similar implementation methods based on the technical concept of this application without departing from the technical concept of this application also fall within the protection scope of the embodiments of this application.

Claims

1. A method for dynamically adjusting the rolling elevation of a thick plate rolling mill, characterized in that, include: Obtain the actual roll diameter of the lower working roll of the heavy plate rolling mill, determine the target rolling elevation adjustment strategy based on the actual roll diameter of the lower working roll, and determine the target rolling elevation based on the target rolling elevation adjustment strategy; The roll gap control extension is calculated based on the target rolling elevation to obtain the target roll gap control extension. The rolling elevation dynamic adjustment operation is performed multiple times until the preset stopping condition is met, and the adjustment result of the rolling elevation is obtained. The steps of the dynamic adjustment operation of the rolling elevation include: The rolling elevation is adjusted by adjusting the movement position of the roll gap control hydraulic cylinder based on the target roll gap extension amount. Obtain the adjusted actual rolling elevation, and calculate the difference between the adjusted actual rolling elevation and the target rolling elevation as the rolling elevation deviation value; If the absolute value of the rolling elevation deviation is greater than or equal to the preset rolling elevation deviation threshold, the target roll gap control extension is corrected based on the rolling elevation deviation value. The preset stopping condition is that the absolute value of the rolling elevation deviation is less than the preset rolling elevation deviation threshold.

2. The method for dynamically adjusting the rolling elevation of a thick plate rolling mill as described in claim 1, characterized in that, Also includes: Before performing the dynamic adjustment operation of the rolling elevation, the target rolling elevation and the plane shape control parameter mapping table are searched based on the target rolling elevation to obtain the target plane shape control parameters. The groove depth is adjusted based on the target planar shape control parameters to optimize the planar shape of the slab to be rolled.

3. The method for dynamically adjusting the rolling elevation of a thick plate rolling mill as described in claim 1, characterized in that, The method of determining the target rolling elevation adjustment strategy based on the actual roll diameter of the lower work roll, and determining the target rolling elevation based on the target rolling elevation adjustment strategy, includes: In response to the actual diameter of the lower work roll being less than or equal to a first lower work roll diameter threshold, a first rolling height adjustment strategy is adopted as the target rolling height adjustment strategy. The first rolling height adjustment strategy is as follows: if the actual diameter of the upper work roll is greater than or equal to a first upper work roll diameter threshold, the target rolling height is adjusted to the first rolling height; if the actual diameter of the upper work roll is less than the first upper work roll diameter threshold, the target rolling height is adjusted to the second rolling height; the first rolling height is less than the second rolling height. In response to the actual diameter of the lower work roll being greater than the first lower work roll diameter threshold and less than or equal to the second lower work roll diameter threshold, a second rolling height adjustment strategy is adopted as the target rolling height adjustment strategy. The second rolling height adjustment strategy is as follows: if the actual diameter of the upper work roll is greater than or equal to the first upper work roll diameter threshold, the target rolling height is determined based on the lower work roll diameter; if the actual diameter of the upper work roll is less than the first upper work roll diameter threshold, the target rolling height is adjusted to the second rolling height.

4. The method for dynamically adjusting the rolling elevation of a thick plate rolling mill as described in claim 1, characterized in that, The thick plate rolling mill also includes a lower support roll, a lower support roll pad, and a stepped pad. The lower support roll is used to support the lower work roll. The stepped pad and the lower support roll pad are arranged sequentially between the bottom of the bearing seat of the frame and the lower support roll. The calculation of the roll gap control extension based on the target rolling elevation to obtain the target roll gap control extension includes: Obtain the actual diameter of the lower support roller, the actual height of the stepped pad, and the actual thickness of the lower support roller pad; The compensation amount for the lower working roll diameter is calculated based on the preset maximum lower working roll diameter and the actual lower working roll diameter. The lower support roller radius compensation amount is calculated based on the preset maximum lower support roller diameter and the actual lower support roller diameter. The step height deviation value is calculated based on the preset reference step height and the actual height of the step. The thickness deviation value of the lower support roller pad is obtained by calculating based on the preset reference lower support roller pad thickness and the actual thickness of the lower support roller pad. Determine the corresponding target roll gap control extension reference value based on the target rolling elevation; The target roll gap control extension is obtained by summing the compensation amount of the lower working roll diameter, the compensation amount of the lower support roll radius, the deviation value of the step pad height, the deviation value of the lower support roll pad thickness, and the reference value of the target roll gap control extension.

5. The method for dynamically adjusting the rolling elevation of a thick plate rolling mill as described in claim 4, characterized in that, The thick plate rolling mill also includes an arc pad, which is located between the lower support roll pad and the bearing seat of the lower support roll; The method further includes: Obtain the actual height of the arc pad; The deviation value of the arc pad is obtained by calculating based on the preset reference arc pad height and the actual height of the arc pad; If the arc pad deviation value is greater than or equal to the preset arc pad deviation threshold, the target roll gap control extension reference value is compensated based on the arc pad deviation value to obtain the compensated roll gap control extension reference value. The step of summing the lower working roll diameter compensation amount, the lower support roll radius compensation amount, the stepped pad height deviation value, the lower support roll pad thickness deviation value, and the target roll gap control extension reference value to obtain the target roll gap control extension amount includes: The target roll gap control extension is obtained by summing the compensation amount of the lower working roll diameter, the compensation amount of the lower support roll radius, the deviation value of the step pad height, the deviation value of the lower support roll pad thickness, and the benchmark value of the compensated roll gap control extension.

6. The method for dynamically adjusting the rolling elevation of a thick plate rolling mill as described in claim 2, characterized in that, Before adjusting the trench depth based on the target plane shape control parameters, the method further includes: Obtain the bite speed and rolling speed; If the biting speed is less than a preset speed threshold and the rolling speed is greater than or equal to the preset speed threshold, then the biting speed is adjusted to the preset speed threshold. If the bite speed is greater than or equal to the preset speed threshold, and the rolling speed is less than the preset speed threshold, then the rolling speed is adjusted to the preset speed threshold. If the bite speed is less than the preset speed threshold and the rolling speed is less than the preset speed threshold, then both the bite speed and the rolling speed are first adjusted to the preset speed threshold. If both the biting speed and the rolling speed are greater than or equal to a preset speed threshold, no adjustment is made.

7. The method for dynamically adjusting the rolling elevation of a thick plate rolling mill as described in claim 1, characterized in that, Also includes: Obtain the actual rolling elevation and the actual diameter of the lower work roll; Determine whether the over-limit condition is met based on the actual rolling elevation and the actual roll diameter of the lower work roll. If the conditions for exceeding the limit are met, an alarm signal and a rolling stop signal will be triggered. The condition exceeding the limit is: in, This is the actual rolling elevation. This is the actual diameter of the lower working roll.

8. A dynamic adjustment device for rolling elevation of a thick plate rolling mill, characterized in that, include: The rolling elevation determination module is used to obtain the actual roll diameter of the lower working roll of the thick plate rolling mill, determine the target rolling elevation adjustment strategy based on the actual roll diameter of the lower working roll, and determine the target rolling elevation based on the target rolling elevation adjustment strategy. The extension calculation module is used to calculate the roll gap control extension based on the target rolling elevation to obtain the target roll gap control extension. The rolling elevation dynamic adjustment module is used to perform rolling elevation dynamic adjustment operations multiple times until the preset stop condition is met, and obtain the rolling elevation adjustment result. The steps of the dynamic adjustment operation of the rolling elevation include: The rolling elevation is adjusted by adjusting the movement position of the roll gap control hydraulic cylinder based on the target roll gap extension amount. Obtain the adjusted actual rolling elevation, and calculate the difference between the adjusted actual rolling elevation and the target rolling elevation as the rolling elevation deviation value; If the absolute value of the rolling elevation deviation is greater than or equal to the preset rolling elevation deviation threshold, the target roll gap control extension is corrected based on the rolling elevation deviation value. The preset stopping condition is that the absolute value of the rolling elevation deviation is less than the preset rolling elevation deviation threshold.

9. An electronic device, characterized in that, The electronic device includes a memory and a processor. The memory stores a computer program, and the processor executes a method for dynamically adjusting the rolling elevation of a thick plate rolling mill as described in any one of claims 1 to 7 when running the computer program.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements a method for dynamically adjusting the rolling elevation of a thick plate rolling mill as described in any one of claims 1 to 7.

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