Control method for rolling of cold-rolled strip steel and related equipment

Abstract

The invention discloses a cold-rolled strip steel rolling control method and related equipment, and relates to the technical field of strip steel rolling, and the method comprises the steps that a first deviation rectification value and a second deviation rectification value in the strip steel running process are obtained in real time; based on the first deviation correction value, the rolling speed of the rolling mill is adjusted to a preset speed; after the rolling speed is adjusted, the tension parameter and the roller inclination parameter of the target rack are dynamically adjusted based on the second deviation correction value; and the tension parameter and the roller inclination parameter are recovered to initial set values so as to maintain the continuous stability of the rolling process. According to the method, the deviation correction values in front of the pickling section outlet and the rolling mill inlet are obtained in real time, the rolling speed and the shearing speed are dynamically adjusted before the strip steel enters the rolling mill, the tension parameters of the rack and the inclination direction of the rollers are accurately adjusted in combination with feedback of the second deviation correction value, and the deviation trend caused by camber defects is effectively restrained; and the rolling continuity and stability are improved.

Description

Technical Field

[0001] This application relates to the technical field of strip rolling, and particularly to a control method and related equipment for cold-rolled strip rolling. Background Art

[0002] Cold-rolled strip rolling technology is a process in which hot-rolled strips are repeatedly rolled by a cold rolling mill to cause plastic deformation, thereby obtaining the required thickness. During the production process of cold-rolled strips, the deviation control of the strip is a key link to ensure product quality and production efficiency.

[0003] However, the prior art usually starts to correct and control the strip after it enters the rolling mill, lacking anticipation and adjustment before the strip enters the rolling mill. Secondly, the prior art has limited adjustment means when dealing with a large deviation amount of the strip, and often can only be processed by reducing the rolling speed or directly coiling, which not only affects production efficiency but also increases production costs. Therefore, there is an urgent need for a control method for cold-rolled strip rolling to solve the above-mentioned problems. Summary of the Invention

[0004] A series of simplified concepts are introduced in the Summary of the Invention section, which will be further described in detail in the Detailed Implementation section. The Summary of the Invention section of this application does not mean to attempt to define the key features and essential technical features of the claimed technical solution, nor does it mean to attempt to determine the protection scope of the claimed technical solution.

[0005] In a first aspect, this application provides a control method for cold-rolled strip rolling, including:

[0006] Obtaining a first deviation correction value and a second deviation correction value in real time during the operation of the strip;

[0007] Based on the first deviation correction value, adjusting the rolling speed of the rolling mill to a preset speed;

[0008] After adjusting the rolling speed, dynamically adjusting the tension parameter and the roll tilt parameter of the target stand based on the second deviation correction value;

[0009] After the defective part of the strip passes through the target stand, restoring the tension parameter and the roll tilt parameter to the initial set values to maintain the continuous stability of the rolling process.

[0010] In some embodiments, the first deviation correction value is obtained by a first deviation correction device located at the outlet of the pickling section; the second deviation correction value is obtained by a second deviation correction device located in front of the rolling mill entrance, and the deviation correction accuracy of the second deviation correction device is higher than that of the first deviation correction device.

[0011] In some embodiments, based on the first deviation correction value, adjusting the rolling speed of the rolling mill to a preset speed includes:

[0012] When the absolute value of the first deviation correction value is within the first preset range and the difference between the distance of the weld of the strip steel from the rolling mill and the first preset distance is less than the preset threshold, adjust the rolling speed of the rolling mill to the first preset speed;

[0013] When the absolute value of the first deviation correction value is within the second preset range and the difference between the distance and the first preset distance is less than the preset threshold, adjust the rolling speed of the rolling mill to the second preset speed;

[0014] Wherein, the minimum value of the second preset range is greater than the maximum value of the first preset range, and the second preset speed is less than the first preset speed.

[0015] In some embodiments, based on the second deviation correction value, dynamically adjust the tension parameter and the roll tilt parameter of the target stand, including:

[0016] Determine the tilt direction of the roll according to the positive or negative of the second deviation correction value;

[0017] According to the preset range where the absolute value of the second deviation correction value is located, increase the front and rear tensions of the target stand by the corresponding preset ratio and adjust the tension deviation of the target stand to the preset deviation threshold to offset the deviation trend of the defective part.

[0018] In some embodiments, the preset range includes a third preset range and a fourth preset range. According to the preset range where the absolute value of the second deviation correction value is located, increase the front and rear tensions of the target stand by the corresponding preset ratio and adjust the tension deviation of the target stand to the preset deviation threshold, including:

[0019] When the second deviation correction value is positive and the absolute value of the second deviation correction value is within the third preset range, increase the front and rear tensions of the target stand by the first preset ratio and adjust the tension deviation to the first negative preset deviation value;

[0020] When the second deviation correction value is negative and the absolute value of the second deviation correction value is within the third preset range, increase the front and rear tensions by the first preset ratio and adjust the tension deviation to the first positive preset deviation value;

[0021] When the second deviation correction value is positive and the absolute value of the second deviation correction value is within the fourth preset range, increase the front and rear tensions by the second preset ratio and adjust the tension deviation to the second negative preset deviation value;

[0022] When the second deviation correction value is negative and the absolute value of the second deviation correction value is within the fourth preset range, increase the front and rear tensions by the second preset ratio and adjust the tension deviation to the second positive preset deviation value;

[0023] Wherein, the second preset ratio is greater than the first preset ratio, the absolute value of the second negative preset deviation value is greater than the absolute value of the first negative preset deviation value, the second positive preset deviation value is greater than the first positive preset deviation value, and the minimum value of the fourth preset interval is greater than the maximum value of the third preset interval.

[0024] In some embodiments, after the defective part of the strip steel passes through the target stand, the tension parameter and the roll tilt parameter are restored to the initial set values, including:

[0025] After the defective part passes through the target stand, gradually reduce the tension deviation to a third preset deviation range, wherein the maximum value of the third preset deviation range is less than the first positive preset deviation value;

[0026] When the tension deviation is within the third preset deviation range, reset the roll tilt direction to the initial angle.

[0027] In some embodiments, the method further includes:

[0028] When the absolute value of the second rectification value is greater than the second preset interval, it is determined that the deviation amount of the defective part exceeds the rolling adjustment range, and the rolling mill is controlled to perform a coiling operation on the defective part and terminate the rolling.

[0029] In a second aspect, the present application provides a control device for cold rolling strip steel rolling, including:

[0030] A rectification value acquisition unit, which acquires the first rectification value and the second rectification value in real time during the operation of the strip steel;

[0031] A rolling speed adjustment unit, which adjusts the rolling speed of the rolling mill to a preset speed based on the first rectification value;

[0032] A stand parameter optimization unit, which is used to dynamically adjust the tension parameter and the roll tilt parameter of the target stand based on the second rectification value after the rolling speed is adjusted;

[0033] A stand parameter reset unit, which is used to restore the tension parameter and the roll tilt parameter to the initial set values after the defective part of the strip steel passes through the target stand to maintain the continuous stability of the rolling process.

[0034] In a third aspect, an electronic device includes: a memory, a processor, and a computer program stored in the memory and executable on the processor. The processor is used to implement the steps of the control method for cold rolling strip steel rolling according to any one of the first aspects when executing the computer program stored in the memory.

[0035] In a fourth aspect, the present application provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, it implements the control method for cold rolling strip steel rolling according to any one of the first aspects.

[0036] In summary, the present application obtains the first and second deviation correction values ​​in real time during the operation of the strip, adjusts the rolling speed, frame tension and roll tilt parameters in stages, and restores the initial parameters after the defective part passes. The present application can predict the deviation trend of the strip in advance, accurately compensate for the deviation amount through a dynamic graded adjustment strategy, avoid shutdown accidents caused by accumulated deviation, and improve the continuous stability of the rolling process. At the same time, the parameter recovery mechanism ensures the consistency of subsequent rolling stages, reduces thickness fluctuations and quality defects, thereby improving the yield rate and reducing production costs.

[0037] The control method for cold-rolled strip rolling proposed in this application, and other advantages, objectives and features of this application will be reflected in part through the following description, and in part will also be understood by technical personnel in this field through research and practice of this application. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present specification. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0039] Figure 1 A schematic flow chart of a control method for cold-rolled steel strip rolling provided in an embodiment of the present application;

[0040] Figure 2 A schematic diagram of the structure of a control device for cold-rolled strip steel rolling provided in an embodiment of the present application;

[0041] Figure 3 A schematic diagram of the structure of a control electronic device for cold-rolled strip steel rolling provided in an embodiment of the present application. DETAILED DESCRIPTION

[0042] In the description and claims of this application and the above-mentioned drawings, terms such as "first", "second", "third", "fourth", etc. (if any) are used to distinguish similar objects and do not necessarily describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments described herein can be implemented in an order different from that illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units does not necessarily limit to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products, or devices. The technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all of the embodiments.

[0043] Please refer to Figure 1 , which is a schematic flow diagram of a control method for cold-rolled strip rolling provided by an embodiment of this application, and specifically may include:

[0044] S110. Real-time obtain the first deviation correction value and the second deviation correction value during the running of the strip;

[0045] Exemplarily, during the cold-rolled strip rolling process, real-time obtaining the first deviation correction value and the second deviation correction value is the core basis for controlling the strip deviation. The first deviation correction value is detected by the deviation correction device at the outlet of the pickling section and is used to preliminarily monitor the position deviation trend of the strip; the second deviation correction value is obtained by the high-precision deviation correction device before the entrance of the rolling mill, and its detection result can more accurately reflect the actual deviation state of the strip before entering the rolling mill. Through phased and position-based data collection, it provides a real-time feedback basis for subsequent dynamic adjustment.

[0046] The synergistic effect of the first deviation correction value and the second deviation correction value lies in building a two-level monitoring mechanism. The deviation correction value at the outlet of the pickling section provides early warning to identify potential deviation risks caused by defects such as head and tail sickle bends of the strip; while the deviation correction value before the entrance of the rolling mill conducts a refined quantitative analysis of the deviation amount through higher-precision detection. The real-time data linkage of the two forms a global perception of the strip running state, ensuring the timeliness and accuracy of subsequent rolling parameter adjustment. This phased deviation correction data acquisition method can not only predict the deviation trend of the strip in advance, but also provide a more accurate basis for dynamic adjustment during the rolling process, thus effectively avoiding downtime accidents caused by deviation and improving the stability and production efficiency of the rolling process.

[0047] S120. Based on the first deviation correction value, adjust the rolling speed of the rolling mill to a preset speed;

[0048] Exemplarily, during the cold rolling process of strip steel, the deviation tendency of the strip steel will directly affect the rolling stability and product quality. To address the strip steel deviation problem, the system adjusts the rolling speed of the rolling mill based on the first deviation correction value. The first deviation correction value reflects the deviation state of the strip steel before entering the rolling mill. When the deviation amount is large, reducing the rolling speed can leave more adjustment time for subsequent deviation correction operations, thereby avoiding tension fluctuations or shutdown accidents caused by deviation.

[0049] By adjusting the rolling speed to the preset speed, the system can intervene in advance before the strip steel enters the rolling mill, reducing the impact of deviation on the rolling process. This speed adjustment strategy can not only effectively alleviate the deviation tendency but also provide a more stable rolling environment for the subsequent dynamic adjustment of the tension parameters of the stand and the roll tilt parameters, thereby ensuring the continuity of the rolling process and the stability of product quality.

[0050] S130. After adjusting the rolling speed, based on the second deviation correction value, dynamically adjust the tension parameters and roll tilt parameters of the target stand;

[0051] Exemplarily, on the basis of adjusting the rolling speed, the system further uses the second deviation correction value to dynamically optimize the tension parameters and roll tilt parameters of the target stand. The second deviation correction value reflects the real-time deviation state of the strip steel before the entrance of the rolling mill, and its high-precision characteristic provides a reliable basis for the fine adjustment of rolling parameters. By dynamically adjusting the tension parameters, the system can balance the tension difference generated by the deviation of the strip steel during the rolling process, and adjusting the roll tilt parameters directly acts on the position correction of the strip steel, thereby suppressing the further expansion of the deviation tendency.

[0052] The core of this dynamic adjustment mechanism lies in the real-time response to the deviation change of the strip steel, ensuring that the rolling process is always within the controllable range. By combining the coordinated adjustment of the tension parameters and the roll tilt parameters, the system can effectively offset the influence of the defective part of the strip steel on the rolling stability, avoid shutdown accidents caused by local tension mutations or position offsets, and at the same time lay a foundation for restoring the parameters to the initial state later, ensuring the continuity of the rolling process and the consistency of product quality.

[0053] S140. After the defective part of the strip steel passes through the target stand, restore the tension parameters and roll tilt parameters to the initial set values to maintain the continuous stability of the rolling process.

[0054] Exemplarily, after the defective part of the strip steel passes through the target stand, the system needs to gradually restore the tension parameter and the roll tilt parameter to the initial set values. The purpose of this step is to ensure that the rolling process can quickly return to the normal state after the defective part passes through, and to avoid adverse effects on the subsequent strip steel rolling caused by excessive parameter adjustment or residual deviation. By restoring the initial set values, the system can provide stable working conditions for the subsequent strip steel rolling, thereby maintaining the continuity and consistency of the entire rolling process.

[0055] The process of parameter restoration is an important part of rolling control. It can not only eliminate the temporary parameter changes caused by the adjustment of the defective part, but also provide a standardized operating environment for the subsequent strip steel rolling. This restoration mechanism ensures that the rolling system can quickly return to the normal state after dealing with local defects, thereby effectively improving production efficiency, reducing quality problems caused by parameter fluctuations, and ensuring the overall stability of the rolling process.

[0056] This application obtains the first deviation correction value and the second deviation correction value during the operation of the strip steel in real time, adjusts the rolling speed of the rolling mill to the preset speed based on the first deviation correction value, and dynamically adjusts the tension parameter and the roll tilt parameter of the target stand based on the second deviation correction value after the rolling speed is adjusted. Finally, the tension parameter and the roll tilt parameter are restored to the initial set values after the defective part of the strip steel passes through the target stand. This method can effectively suppress the trend of strip steel deviation, reduce the shutdown accidents caused by deviation, improve the continuous stability and production efficiency of the rolling process, and ensure the product quality at the same time.

[0057] In some instances, the first deviation correction value is obtained by the first deviation correction device, and the first deviation correction device is located at the outlet of the pickling section; the second deviation correction value is obtained by the second deviation correction device, and the second deviation correction device is located in front of the entrance of the rolling mill, and the deviation correction accuracy of the second deviation correction device is higher than that of the first deviation correction device.

[0058] Exemplarily, the first deviation correction value is obtained by the first deviation correction device located at the outlet of the pickling section. The first deviation correction device is used to monitor the position deviation of the strip steel at the outlet of the pickling section in real time. Its deviation correction accuracy is ±1mm, and it can initially identify the deviation trend caused by defects such as head and tail sickle bends of the strip steel. The acquisition of the first deviation correction value provides an early warning basis for the subsequent adjustment of the rolling speed, ensuring that intervention measures can be taken in advance before the strip steel enters the rolling mill to avoid further expansion of the deviation amount.

[0059] The second deviation correction value is obtained by a second deviation correction device located in front of the mill entrance, and the deviation correction accuracy of the second deviation correction device is higher than that of the first deviation correction device. As the last deviation correction detection link before the strip enters the mill, the second deviation correction device can more accurately quantify the actual deviation state of the strip, providing accurate feedback for the subsequent dynamic adjustment of the tension parameter and the roll inclination parameter. Through the synergistic effect of the two-stage deviation correction devices, the present application realizes the phased monitoring and intervention of the strip deviation trend, significantly improving the control accuracy of the rolling process.

[0060] The layout position and accuracy difference between the first deviation correction device and the second deviation correction device reflect the hierarchical processing strategy of the present application for the strip deviation problem. The first deviation correction device at the exit of the pickling section is mainly used to initially identify the deviation risk, while the second deviation correction device in front of the mill entrance is used to accurately quantify the deviation amount and guide the subsequent parameter adjustment. This two-stage deviation correction mechanism not only improves the comprehensiveness and accuracy of deviation detection, but also provides reliable data support for the dynamic adjustment of the rolling speed, tension parameter and roll inclination, thus effectively avoiding the shutdown or strip breakage accidents caused by deviation and improving the rolling efficiency and product quality.

[0061] In some examples, based on the first deviation correction value, adjusting the rolling speed of the mill to a preset speed includes:

[0062] When the absolute value of the first deviation correction value is within a first preset interval and the difference between the distance of the weld of the strip from the mill and the first preset distance is less than a preset threshold, adjusting the rolling speed of the mill to a first preset speed;

[0063] When the absolute value of the first deviation correction value is within a second preset interval and the difference between the distance and the first preset distance is less than a preset threshold, adjusting the rolling speed of the mill to a second preset speed;

[0064] Wherein, the minimum value of the second preset interval is greater than the maximum value of the first preset interval, and the second preset speed is less than the first preset speed.

[0065] Exemplarily, when the absolute value of the first deviation correction value is within the first preset interval and the difference between the distance of the weld of the strip from the mill and the first preset distance is less than the preset threshold, the system adjusts the rolling speed to the first preset speed. At this time, the first deviation correction value indicates that the deviation amount of the strip is in a medium range. By appropriately reducing the rolling speed, sufficient adjustment time can be provided for the deviation correction device in front of the mill, avoiding tension imbalance or shutdown caused by the instantaneous increase of the deviation amount.

[0066] When the absolute value of the first deviation correction value is within the second preset range and the difference between the distance and the first preset distance is less than the preset threshold, the system further reduces the rolling speed to the second preset speed. Since the deviation amount in the second preset range is larger, a lower rolling speed can significantly extend the response window of the deviation correction device, ensuring effective suppression of the deviation trend before the strip steel enters the rolling mill. This hierarchical adjustment strategy dynamically matches the rolling speed based on the severity of the deviation, avoiding the impact of excessive speed reduction on production efficiency and preventing the risk of deviation getting out of control during high-speed rolling.

[0067] In this application, by dividing the absolute value of the first deviation correction value into a first preset range and a second preset range, and combining the preset distance between the weld seam and the rolling mill, hierarchical adjustment of the rolling speed is achieved. Among them, the maximum value of the second preset range is greater than that of the first preset range, and the corresponding second preset speed is lower than the first preset speed, reflecting the dynamic adaptation relationship between the deviation amount and the rolling speed. This adjustment method not only effectively suppresses the deviation trend of the strip steel but also creates conditions for precise adjustment of subsequent tension parameters and roll inclination, thereby improving the continuous stability of the rolling process and product quality.

[0068] It should be noted that in the embodiments of this application, the first preset range is set to be greater than 30 mm and less than or equal to 60 mm; the first preset distance is set to 50 m; the preset threshold is determined according to the error during the actual operation of the rolling mill; the second preset range is set to be greater than 60 mm; the first preset speed is set to be less than 500 m / min; the second preset speed is set to be less than 300 m / min.

[0069] In some instances, based on the second deviation correction value, the tension parameters and roll inclination parameters of the target stand are dynamically adjusted, including:

[0070] Determine the inclination direction of the roll according to the positive or negative nature of the second deviation correction value;

[0071] According to the preset range where the absolute value of the second deviation correction value is located, increase the front and rear tensions of the target stand by the corresponding preset ratio and adjust the tension deviation of the target stand to the preset deviation threshold to offset the deviation trend of the defective part. The preset range includes a third preset range and a fourth preset range, including:

[0072] When the second deviation correction value is positive and the absolute value of the second deviation correction value is within the third preset range, increase the front and rear tensions of the target stand by the first preset ratio and adjust the tension deviation to the first negative preset deviation value;

[0073] When the second deviation correction value is negative and the absolute value of the second deviation correction value is within the third preset range, increase the front and rear tensions by the first preset ratio and adjust the tension deviation to the first positive preset deviation value;

[0074] When the second deviation correction value is positive and the absolute value of the second deviation correction value is within the fourth preset range, increase the front and rear tensions by a second preset ratio, and adjust the tension deviation to a second negative preset deviation value;

[0075] When the second deviation correction value is negative and the absolute value of the second deviation correction value is within the fourth preset range, increase the front and rear tensions by a second preset ratio, and adjust the tension deviation to a second positive preset deviation value;

[0076] Wherein, the second preset ratio is greater than the first preset ratio, the absolute value of the second negative preset deviation value is greater than the absolute value of the first negative preset deviation value, the second positive preset deviation value is greater than the first positive preset deviation value, and the minimum value of the fourth preset range is greater than the maximum value of the third preset range.

[0077] Exemplarily, when the second deviation correction value is positive (e.g., +10 mm to +60 mm), the system determines that the strip is running off to the operator side. At this time, adjust the tilt direction of the roll towards the operator side to actively correct the position deviation of the strip. Meanwhile, according to the preset range where the absolute value of the second deviation correction value is located, increase the front and rear tensions of the target stand (such as Stand S1) by a preset ratio. For example, when the absolute value of the second deviation correction value is within the third preset range (10 mm to 30 mm), increase the front and rear tensions by the first preset ratio (such as 7% - 10%), and adjust the tension deviation to the first negative preset deviation value (such as -10 KN); when it is within the fourth preset range, increase the tension by the second preset ratio (such as 10% - 15%), and adjust the tension deviation to the second negative preset deviation value (such as -15 KN). While adjusting the tension deviation of the target stand S1, determine the tension deviation of the next stand S2 based on the actual situation and the adjustment value of the target stand S1. By adjusting the roll tilt direction and tension parameters, the system can effectively offset the running-off trend of the defective part of the strip and prevent the mill from stopping due to sudden tension changes.

[0078] When the second deviation correction value is negative (e.g., -10 mm to -60 mm), the system determines that the strip is running off to the drive side. At this time, adjust the roll tilt direction towards the drive side. The tension adjustment strategy is symmetric to that of positive running-off: if the absolute value of the second deviation correction value is within the third preset range (10 mm to 30 mm), increase the front and rear tensions by the first preset ratio (such as 7% - 10%), and adjust the tension deviation to the first positive preset deviation value (such as +10 KN); if it is within the fourth preset range, increase the tension by the second preset ratio (such as 10% - 15%), and adjust the tension deviation to the second positive preset deviation value (such as +15 KN). While adjusting the tension deviation of the target stand S1, determine the tension deviation of the next stand S2 based on the actual situation and the adjustment value of the target stand S1. This symmetric adjustment mechanism ensures that regardless of the running-off direction, the system can balance the force difference on both sides of the strip through the coordinated action of roll tilt and tension compensation, thereby stabilizing the rolling process.

[0079] It should be noted that in the embodiments of the present application, the third preset interval is set to be greater than or equal to 10 mm and less than or equal to 30 mm; the fourth preset interval is set to be greater than 30 mm and less than or equal to 60 mm. The fourth preset interval is the same as the first preset interval. The first preset interval is used to adjust the rolling speed, and the fourth preset interval is used to adjust the tension parameter and the roll tilt parameter; the first preset ratio is set to be greater than or equal to 7% and less than or equal to 10%; the second preset ratio is set to be greater than 10% and less than or equal to 15%; the first negative preset deviation value is -10 KN; the first positive preset deviation value is +10 KN; the second negative preset deviation value is -15 KN; the second positive preset deviation value is +15 KN; the tension deviation is the difference between the drive side tension and the operator side tension; the back tension refers to the tensile force applied at the front end of the S1 stand (i.e., where the strip enters the rolling mill), and the purpose is to ensure that the strip smoothly enters the rolling mill and maintains an appropriate tension. The front tension refers to the tensile force applied at the back end of the S1 stand (i.e., where the strip leaves the rolling mill), and the purpose is to ensure that the end of the strip can stably pass through the stand and prevent deviation due to uneven tension.

[0080] In some examples, after the defective part of the strip passes through the target stand, the tension parameter and the roll tilt parameter are restored to the initial set values, including:

[0081] After the defective part passes through the target stand, the tension deviation is gradually reduced to the third preset deviation range, where the maximum value of the third preset deviation range is less than the first positive preset deviation value;

[0082] When the tension deviation is within the third preset deviation range, the roll tilt direction is reset to the initial angle.

[0083] Exemplarily, when the defective part of the strip passes through the target stand, the system gradually reduces the tension deviation to the third preset deviation range to ensure a smooth transition of the rolling parameters to the normal state. For example, if the front tension deviation before the defective part passes through is 20 KN, the system will gradually reduce the tension deviation to within the range of -5 KN to +5 KN in stages according to the preset adjustment rate. This process can avoid secondary deviation or tension fluctuation of the strip caused by parameter mutation, and at the same time provide a stable tension environment for the reset of the roll tilt direction. The setting of the third preset deviation range is based on the rolling stability requirement to ensure that the tension deviation is within a controllable range during subsequent strip rolling.

[0084] After the tension deviation is adjusted to the third preset deviation range, the system further resets the tilt direction of the rolling mill to the initial angle. For example, if the rolling mill was tilted 2° towards the operator side due to deviation compensation before, the system will gradually restore the tilt angle to the initial angle according to the preset reset rate (such as 0.5° per adjustment). This step-by-step reset mechanism can avoid the impact of sudden changes in the position of the rolling mill on the position of the strip steel, while ensuring the continuity and consistency of rolling parameters. After the reset is completed, the tilt direction of the rolling mill is exactly aligned with the initial setting value, providing standardized conditions for the normal rolling of the subsequent strip steel.

[0085] The recovery processes of the tension parameter and the rolling mill tilt parameter are carried out in coordination. The reduction of the tension deviation provides stable force conditions for the reset of the rolling mill tilt, while the reset of the rolling mill tilt further ensures the precise control of the strip steel position. For example, after the tension deviation is restored to the range of -5KN to +5KN, the tilt direction of the rolling mill is reset to the initial angle. At this time, the system restores the tension parameter to the initial tension value, providing standardized operating conditions for the rolling of the next section of strip steel. This dynamic recovery mechanism can not only effectively eliminate the temporary parameter changes caused by the adjustment of the defective part, but also provide a stable working environment for the subsequent rolling, thus ensuring the continuity of the rolling process and the stability of the product quality.

[0086] It should be noted that in the embodiment of the present application, the third preset deviation range is -5KN to +5KN; while restoring the tension deviation of the target stand S1, it is also necessary to restore the tension deviation of the next stand S2. The recovery range of the tension deviation of stand S2 is within the fourth preset deviation range, where the fourth preset deviation range is -3KN to +3KN; the maximum value of the third preset deviation range and the maximum value of the fourth preset deviation range are less than the first positive preset deviation value (+10KN).

[0087] In some examples, the method further includes:

[0088] When the absolute value of the second deviation correction value is greater than the second preset interval, it is determined that the deviation amount of the defective part exceeds the rolling adjustment range, and the rolling mill is controlled to perform a coiling operation on the defective part and terminate the rolling.

[0089] Exemplarily, when the absolute value of the second deviation correction value exceeds the second preset interval, the system determines that the deviation amount of the strip steel has exceeded the adjustment range of the rolling mill. For example, if the second deviation correction value is +65mm or -65mm, the system will trigger an exception handling mechanism. This determination is based on the monitoring data of the second deviation correction device to ensure the accuracy of the deviation amount judgment. By setting the second preset interval (greater than 60mm), the system can take corresponding measures in time when the deviation amount reaches a dangerous level, avoiding breakage accidents or equipment damage caused by excessive deviation.

[0090] After determining that the deviation exceeds the limit, the rolling mill is controlled to perform a coiling operation on the defective part. For example, the system will start the coiling device to coil the strip at the defective part, and at the same time terminate the current rolling process. The purpose of the coiling operation is to remove the defective part that cannot be normally rolled from the production line, thereby minimizing production losses and equipment risks. This abnormal handling mechanism can not only effectively improve the safety of the rolling process, but also provide data support for subsequent process optimization and equipment maintenance, thus ensuring the long-term stable operation of the production line.

[0091] In some examples, the method further includes:

[0092] When it is found that the strip has a camber defect, the shearing speed is set to be less than the shearing threshold to ensure sufficient adjustment time for the rolling operation.

[0093] Exemplarily, when the strip has a camber defect, the system needs to leave sufficient adjustment time for the rolling operation to ensure that the strip can pass through the rolling mill smoothly and avoid deviation or breakage accidents. The setting of the shearing speed directly affects the response time of the adjustment operation and the stability of the rolling force. By limiting the shearing speed to less than 160 m / min, the system can ensure the timeliness of the adjustment operation while avoiding excessive rolling force and additional tension caused by too low a speed. The setting of the shearing speed needs to find a balance between the timeliness of operation adjustment and the stability of the rolling force. Too high a shearing speed will result in insufficient adjustment time and cannot effectively cope with the camber defect; while too low a shearing speed will result in excessive rolling force and additional tension, affecting the stability of the rolling process.

[0094] It should be noted that in the embodiments of the present application, the shearing threshold is 160 m / min, and the shearing speed refers to the outlet speed of the rolling mill, which is mainly used for speed control during the preparation for shearing the weld connection of two coils of strip.

[0095] The technical solution of the present application will be further described in detail below through specific embodiments.

[0096] Taking Embodiment 1 as an example for detailed elaboration:

[0097] The grade of the rolled strip is HC340 / 590DHD+Z, and the strip specifications are rolled from 4.0 mm×1345 mm to 1.02 mm×1345 mm. During the rolling process, the camber defect is optimized and adjusted, and the specific implementation steps are as follows:

[0098] Monitor the deviation correction value of No. 6. During the operation of the strip steel, the No. 6 deviation correction device plays an important monitoring role. The No. 6 deviation correction is located at the exit of the pickling section and is the first deviation correction device mentioned in this application. When this coil of strip steel is 10 meters away from the weld and passes through the No. 6 deviation correction device, the detected deviation correction adjustment value of No. 6 is +38 mm. According to the system setting, this positive value indicates that the strip steel is running off to the operator side at this time. Since the deviation correction value of No. 6 is greater than +30 mm or less than -30 mm, the system triggers an alarm prompt message to remind the operator that the strip steel has an abnormal deviation and measures need to be taken in time for adjustment.

[0099] Mill speed adjustment. After receiving the alarm message that the deviation correction value of No. 6 is too large, the mill responds quickly and adjusts the rolling speed of the deviated part. Given that the deviation correction roller value of No. 6 is +38 mm, which is in the range of greater than +30 mm and less than +60 mm, that is, within the first preset range. According to the technical solution setting, when the weld is 50 meters away from the mill, the rolling speed is reduced to 480 m / min. This speed adjustment operation is of great significance. It mainly leaves sufficient control and adjustment time for the No. 8 deviation correction device (the second deviation correction device) in front of the mill. Because if the rolling speed is too fast, the No. 8 deviation correction device may not have enough time to effectively adjust the deviation of the strip steel, resulting in too large an instantaneous adjustment of the deviation correction value and then causing a mill shutdown accident. By reasonably reducing the rolling speed, the smooth progress of subsequent deviation correction operations can be ensured and the production continuity can be guaranteed.

[0100] Shearing speed adjustment. After discovering the sickle bend defect of the strip steel, in order to leave sufficient adjustment time for subsequent rolling operations, it is necessary to reasonably set the shearing speed. In this case, the shearing speed is set to 150 m / min, and this speed selection has been fully considered. On the one hand, this speed can take into account the timeliness of operation adjustment, enabling the operator to have enough time to handle the strip steel deviation problem; on the other hand, it can effectively avoid the situation of too large rolling force and additional tension caused by too low speed, preventing adverse effects on the strip steel quality. At the same time, on the premise of meeting the production operation requirements, the impact on production efficiency is minimized, achieving a balance between production efficiency and product quality.

[0101] Rolling parameter adjustment. The No. 8 deviation correction device is located in front of the mill and is the last line of defense for correcting the position of the strip steel before rolling. The size of the deviation correction value detected by it directly reflects the size of the strip steel deviation amount. When observing that the deviation correction value of No. 8 is +22 mm, according to the technical solution, the relevant rolling parameters of the S1 stand of the mill are adjusted.

[0102] First, increase the front and rear tensions of the S1 stand of the mill by 8% - 10%. Specifically, the rear tension of the S1 stand is increased from 220 KN to 240 KN, and the front tension of the S1 stand is increased from 465 KN to 510 KN. The purpose of increasing the front and rear tensions is to enhance the stability of the strip steel and reduce the deviation trend.

[0103] Secondly, adjust the roll inclination of the S1 stand towards the operator side, and adjust the tension deviation between the S1 and S2 stands to -10 KN. By adjusting the roll inclination angle and the tension deviation, the strip steel is subjected to appropriate forces during the rolling process, further correcting the deviation direction.

[0104] When the sickle-shaped bend part of the strip steel enters the rolling mill, due to the special shape of the strip steel, it will cause an instantaneous increase in the drive-side tension, and further increase the tension deviation of the S1 stand. At this time, continue to adjust the roll inclination of the S1 stand towards the operator side to correct the tension deviation value behind the S1 stand, adjust the tension deviation of the S1 stand to no more than 16 KN, and at the same time keep the current value of the tension deviation of the S2 stand unchanged. This dynamic adjustment process is carried out according to the actual force condition of the strip steel, ensuring the stability of the strip steel during the rolling process.

[0105] As the rolling progresses, when the tension deviation of the S1 stand gradually decreases from 16 KN, it indicates that the trend of the sickle-shaped bend of the strip steel is gradually shrinking. At this time, in order to restore the strip steel to the normal rolling state, it is necessary to adjust the roll inclination of the S1 stand towards the drive side. After the sickle-shaped bend part passes through the S1 stand, restore the tension deviation of the S1 stand to 3 KN and the tension deviation of the S2 stand to 2 KN. Such adjustment operations restore the S1 and S2 stands to a relatively stable working state, ensuring the rolling quality of the subsequent normal strip steel in the stands.

[0106] When the shearing is completed, it means that the current strip steel section being processed has ended. In order to restore the rolling mill system to the standard working state for the rolling of the next strip steel section, restore the front and rear tensions of the S1 stand to the initial set values. This operation ensures the continuity and stability of the entire rolling process, enabling the rolling mill to operate continuously and efficiently.

[0107] Through the above adjustments, the rolling mill successfully suppresses the deviation trend caused by the sickle-shaped bend defect of the strip steel, avoiding the occurrence of strip breakage or shutdown accidents. After the adjustment is completed, the rolling mill resumes normal rolling, ensuring the continuous stability of the production process and the product quality.

[0108] Taking Example 2 as an example, a detailed description is as follows:

[0109] The grade of the strip steel rolled this time is 73AA1, and the strip steel specification changes from the initial 2.5 mm × 1084 mm to 1.32 mm × 1084 mm after rolling. During the entire rolling process, according to the characteristics of the strip steel and the process requirements, strict control is carried out on various parameters to ensure the quality of the strip steel and the smooth progress of the rolling process.

[0110] During the operation of the strip, the system monitors the deviation value of the No. 6 deviation correction device at the exit of the pickling section in real time. When this strip passes through the No. 6 deviation correction device 8 meters away from the weld, the No. 6 deviation correction adjustment value is -63mm, indicating that the deviation of the strip to the drive side exceeds the second preset range (-60mm). The system immediately triggers an alarm prompt message, reminding the operator that there is a serious risk of the strip deviation.

[0111] After the rolling mill receives the alarm message that the deviation value of No. 6 is too large, it immediately starts the rolling speed adjustment program for the deviation part. In view of the fact that the deviation correction roller value of No. 6 is -63mm, according to the speed adjustment strategy set in the technical solution, when the weld reaches 50 meters away from the rolling mill, the rolling speed is reduced to 275m / min. The core purpose of this operation is to buy enough time for the No. 8 deviation correction device in front of the rolling mill to implement precise control adjustments. Because during the rolling process, if the rolling speed is too fast, it is difficult for the No. 8 deviation correction device to effectively correct the deviation of the strip in a short time, which may cause the deviation correction value to change too much instantly, thereby causing the rolling mill to stop and affect the continuity of production. By reasonably reducing the rolling speed, favorable conditions are created for subsequent deviation correction operations, ensuring that the strip can enter the rolling mill in a relatively stable state.

[0112] When it is determined that the strip has a sickle bend defect, the shear speed is optimized to ensure that there is enough time for precise adjustment of the subsequent rolling operation. In this implementation case 2, the shear speed is set to 120m / min. This speed selection is the result of comprehensive consideration of many factors: on the one hand, this speed can ensure that the operator has more time to deal with the problem of strip deviation and meet the timeliness requirements of operation adjustment; on the other hand, it can effectively avoid the problem of excessive rolling force and additional tension caused by too low speed, and prevent negative impact on the quality of the strip. At the same time, on the basis of ensuring the smooth progress of production operations, the adverse effects on production efficiency are controlled to the minimum range, achieving a balance between production efficiency and product quality.

[0113] The No. 8 deviation correction device is located in front of the rolling mill. As the last key link to correct the position of the strip before rolling, the deviation value detected by it directly reflects the deviation of the strip. When the No. 8 deviation correction value is observed to be -43mm, the relevant rolling parameters of the S1 stand of the rolling mill are adjusted in a targeted manner according to the technical plan.

[0114] First, increase the front and rear tension of the S1 stand of the rolling mill by 10-15%. In the actual adjustment, the rear tension of the S1 stand increased from 189KN to 213KN, an increase of 12.7%; the front tension of the S1 stand increased from 438KN to 490KN, an increase of 11.9%, both within the second preset ratio range. Increasing the front and rear tension can enhance the stability of the strip during the rolling process and effectively suppress the deviation trend caused by sickle bend defects.

[0115] Secondly, adjust the S1 stand roll inclination toward the drive side, and adjust the S1 stand tension deviation to 13KN, and the S2 stand tension deviation to 10KN. By changing the roll inclination angle and setting the appropriate tension deviation, the strip can be subjected to a reasonable force when entering the rolling mill, further correcting the deviation direction and ensuring the correct position of the strip in the rolling mill.

[0116] When the sickle bend of the strip enters the rolling mill, due to the special shape of the strip, the tension on the operating side will increase instantly, which will lead to an increase in the tension deviation on the operating side. At this time, continue to adjust the S1 stand roll tilt toward the drive side to correct the S1 stand tension deviation value, adjust the S1 stand tension deviation to -18KN, and keep the S2 stand tension deviation unchanged. This dynamic adjustment process is based on the real-time force changes of the strip during the rolling process, which can ensure the stability of the strip when passing through the rolling mill.

[0117] As rolling continues, when the tension deviation of the S1 frame gradually decreases from -18KN, it indicates that the influence of the sickle bend of the strip is gradually weakening, and the tendency of the strip to deviate is gradually decreasing. At this time, in order to restore the strip to a normal rolling state, it is necessary to adjust the roll tilt of the S1 frame to the operating side. When the sickle bend part passes through the S1 frame smoothly, the tension deviation of the S1 frame is restored to 3KN, and the tension deviation of the S2 frame is restored to 2KN. Such adjustment operations can return the S1 and S2 frames to a stable working state, ensuring the subsequent normal rolling quality of the strip in the frame.

[0118] When the shearing operation is completed, it means that the processing of the current strip section is completed. In order to restore the rolling mill system to the standard working state for the subsequent strip rolling, the front and rear tensions of the S1 stand are restored to the original set values, that is, the rear tension is 189KN and the front tension is 438KN. This operation ensures the continuity and stability of the entire rolling process, allowing the rolling mill to operate continuously and efficiently, and fully prepare for the rolling of the next strip.

[0119] This embodiment effectively solves the problem of strip deviation caused by sickle camber defects by real-time monitoring of the No. 6 and No. 8 correction values ​​and dynamically adjusting the rolling speed, shear speed, tension parameters and roll inclination angle. During the adjustment process, the system optimizes the parameters in stages and steps to ensure the stability and continuity of the rolling process, while minimizing the impact on production efficiency.

[0120] See also Figure 2 , is a schematic diagram of the structure of a control device for cold-rolled strip steel rolling provided in an embodiment of the present application, comprising:

[0121] A deviation correction value acquisition unit 21, which acquires a first deviation correction value and a second deviation correction value during the operation of the strip steel;

[0122] The rolling speed adjustment unit 22 adjusts the rolling speed of the rolling mill to a preset speed based on the first deviation correction value;

[0123] The stand parameter optimization unit 23 is used to dynamically adjust the tension parameter and the roll tilt parameter of the target stand based on the second deviation correction value after the rolling speed is adjusted;

[0124] The stand parameter reset unit 24 is used to restore the tension parameter and the roll tilt parameter to the initial set values after the defective part of the strip steel passes through the target stand, so as to maintain the continuous stability of the rolling process.

[0125] Please refer to Figure 3 , an electronic device 300 is provided in an embodiment of the present application, including a memory 310, a processor 320, and a computer program 311 stored on the memory 310 and executable on the processor. When the processor 320 executes the computer program 311, the steps of any method of the control device for cold rolling strip steel are implemented.

[0126] Since the electronic device introduced in this embodiment is the device adopted for implementing a control device for cold rolling strip steel in an embodiment of the present application, based on the method introduced in the embodiment of the present application, those skilled in the art can understand the specific implementation manners and various variations of the electronic device in this embodiment. Therefore, the specific implementation of how this electronic device implements the method in the embodiment of the present application will not be described in detail here. As long as the device adopted by those skilled in the art to implement the method in the embodiment of the present application belongs to the scope protected by the present application.

[0127] In the specific implementation process, when the computer program 311 is executed by the processor, any implementation manner in the corresponding embodiment of the first aspect can be implemented.

[0128] It should be noted that in the above embodiments, the descriptions of each embodiment have their own emphases. For the parts not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0129] Those skilled in the art should understand that the embodiments of the present application can provide a method, a system, or a computer program product. Therefore, the present application can be implemented in the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can be implemented in the form of a computer program product implemented on one or more computer-readable storage media (including but not limited to disk memories, CD-ROMs, optical memories, etc.) containing computer-readable program codes.

[0130] This application is described with reference to the flowcharts and / or block diagrams of methods, apparatuses (systems), and computer program products according to embodiments of the present application. It should be understood that each flow and / or block in the flowchart and / or block diagram can be implemented by computer program instructions, and the combination of the flows and / or blocks in the flowchart and / or block diagram can also be implemented. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded computer, or other programmable data processing devices to generate a machine, such that the instructions executed by the processor of the computer or other programmable data processing devices generate a device for implementing the functions specified in one or more of the flows Figure 1 one or more of the flows and / or blocks Figure 1 or a device for implementing the functions specified in one or more of the blocks.

[0131] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, such that the instructions stored in the computer-readable memory generate a manufactured article including an instruction device, and the instruction device implements the functions specified in one or more of the flows Figure 1 one or more of the flows and / or blocks Figure 1 or a device for implementing the functions specified in one or more of the blocks.

[0132] These computer program instructions can also be loaded onto a computer or other programmable data processing device, such that a series of operation steps are executed on the computer or other programmable device to generate a computer-implemented process, and thus the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one or more of the flows Figure 1 one or more of the flows and / or blocks Figure 1 or a device for implementing the functions specified in one or more of the blocks.

[0133] Embodiments of the present application also provide a computer program product, which includes computer software instructions. When the computer software instructions run on a processing device, the processing device is caused to execute Figure 1 the flow of a control method for cold-rolled strip rolling in a corresponding embodiment.

[0134] A computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on a computer, the processes or functions according to the embodiments of the present application are generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by wire (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wirelessly (such as infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be stored by a computer or a data storage device such as a server or a data center that includes one or more integrated available media. The available medium may be a magnetic medium (such as a floppy disk, a hard disk, a magnetic tape), an optical medium (such as a DVD), or a semiconductor medium (such as a solid state disk (SSD)), etc.

[0135] Those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working processes of the systems, devices, and units described above can refer to the corresponding processes in the foregoing method embodiments and will not be described herein again.

[0136] In several embodiments provided in the present application, it should be understood that the disclosed devices, apparatuses, and methods may be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of units is only a logical function division, and there may be other division methods in actual implementation. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Another point is that the displayed or discussed couplings or direct couplings or communication connections to each other may be indirect couplings or communication connections through some interfaces, devices, or units, and may be in electrical, mechanical, or other forms.

[0137] The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place or distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0138] In addition, in each embodiment of the present application, each functional unit can be integrated into a processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

[0139] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art, or all or part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods in the various embodiments of the present application. The aforementioned storage medium includes: various media that can store program codes, such as USB flash drives, mobile hard disks, read-only memories (ROM), random access memories (RAM), magnetic disks, or optical discs.

[0140] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present application.

[0141] Although the preferred embodiments of this specification have been described, those skilled in the art can make additional changes and modifications once they know the basic creative concepts. Therefore, the appended claims are intended to be construed as including the preferred embodiments and all changes and modifications that fall within the scope of this specification.

[0142] Obviously, those skilled in the art can make various changes and deformations to this specification without departing from the spirit and scope of this specification. In this way, if these modifications and deformations of this specification fall within the scope of the claims of this specification and their equivalent technologies, this specification is also intended to include these modifications and deformations.

Claims

1. A method for controlling cold strip rolling, characterized in that: The method comprises: Real-time acquisition of the first deviation correction value and the second deviation correction value during the operation of the strip steel; Based on the first deviation correction value, adjusting the rolling speed of the rolling mill to a preset speed; After the rolling speed is adjusted, dynamically adjusting the tension parameter and the roll tilt parameter of the target stand based on the second deviation correction value; After the defective portion of the strip passes through the target stand, the tension parameter and the roll inclination parameter are restored to the initial set values ​​to maintain the continuous stability of the rolling process.

2. The method according to claim 1, characterized in that The first correction value is obtained through a first correction device, which is located at the outlet of the pickling section; the second correction value is obtained through a second correction device, which is located in front of the rolling mill entrance, and the correction accuracy of the second correction device is higher than that of the first correction device.

3. The method according to claim 1, characterized in that The step of adjusting the rolling speed of the rolling mill to a preset speed based on the first deviation correction value comprises: When the absolute value of the first deviation correction value is within a first preset interval and the difference between the distance between the weld of the steel strip and the rolling mill and the first preset distance is less than a preset threshold, adjusting the rolling speed of the rolling mill to the first preset speed; When the absolute value of the first deviation correction value is within a second preset interval and the difference between the distance and the first preset distance is less than a preset threshold, adjusting the rolling speed of the rolling mill to the second preset speed; The minimum value of the second preset interval is greater than the maximum value of the first preset interval, and the second preset speed is less than the first preset speed.

4. The method according to claim 1, characterized in that: The method of dynamically adjusting the tension parameter and the roll tilt parameter of the target stand based on the second deviation correction value includes: Determining the tilt direction of the roller according to the positive or negative value of the second deviation correction value; According to the preset range of the absolute value of the second deviation correction value, the front and rear tensions of the target frame are increased by a corresponding preset proportion and the tension deviation of the target frame is adjusted to a preset deviation threshold to offset the deviation tendency of the defective part.

5. The method according to claim 4, characterized in that The preset range includes a third preset interval and a fourth preset interval, and the front and rear tensions of the target rack are increased by a corresponding preset ratio and the tension deviation of the target rack is adjusted to a preset deviation threshold according to the preset range in which the absolute value of the second deviation correction value is located, including: When the second deviation correction value is a positive value and the absolute value of the second deviation correction value is within the third preset interval, the front and rear tensions of the target frame are increased by a first preset proportion, and the tension deviation is adjusted to a first negative preset deviation value; When the second deviation correction value is a negative value and the absolute value of the second deviation correction value is within the third preset interval, the front-to-rear tension is increased by the first preset ratio, and the tension deviation is adjusted to the first positive preset deviation value; When the second deviation correction value is positive and the absolute value of the second deviation correction value is within the fourth preset interval, the front-to-rear tension is increased by a second preset ratio, and the tension deviation is adjusted to a second negative preset deviation value; When the second deviation correction value is a negative value and the absolute value of the second deviation correction value is within the fourth preset interval, the front-to-back tension is increased by the second preset ratio, and the tension deviation is adjusted to a second positive preset deviation value; Among them, the second preset ratio is greater than the first preset ratio, the absolute value of the second negative preset deviation value is greater than the absolute value of the first negative preset deviation value, the second positive preset deviation value is greater than the first positive preset deviation value, and the minimum value of the fourth preset interval is greater than the maximum value of the third preset interval.

6. The method according to claim 5, characterized in that After the defective portion of the strip passes through the target stand, restoring the tension parameter and the roll tilt parameter to the initial setting value comprises: After the defective part passes through the target frame, gradually reducing the tension deviation to a third preset deviation range, wherein the maximum value of the third preset deviation range is less than the first positive preset deviation value; When the tension deviation is within the third preset deviation range, the inclination direction of the roller is reset to an initial angle.

7. The method according to any one of claims 1 to 6, characterized in that: The method further comprises: When the absolute value of the second deviation correction value is greater than the second preset interval, it is determined that the deviation amount of the defective part exceeds the rolling adjustment range, and the rolling mill is controlled to perform a curling operation on the defective part and terminate rolling.

8. A control device for cold-rolled strip rolling, characterized in that: include: A deviation correction value acquisition unit is used to obtain the first deviation correction value and the second deviation correction value in real time during the operation of the strip steel; A rolling speed adjustment unit, which adjusts the rolling speed of the rolling mill to a preset speed based on the first deviation correction value; a stand parameter optimization unit, configured to dynamically adjust a tension parameter and a roll tilt parameter of a target stand based on the second deviation correction value after the rolling speed is adjusted; The rack parameter resetting unit is used to restore the tension parameter and the roll tilt parameter to the initial setting value after the defective part of the strip passes through the target rack, so as to maintain the continuous stability of the rolling process.

9. An electronic device, comprising: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor is used to implement the steps of the control method for cold strip rolling as described in any one of claims 1 to 7 when executing the computer program stored in the memory.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the control method for cold strip rolling according to any one of claims 1 to 7 is implemented.

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