A kind of operation control method of cold rolling mill steel rolling

Abstract

The present application relates to the technical field of rolling processing, and discloses an operation control method for rolling steel in a cold rolling mill. The method includes: obtaining the rolling speed of the strip and the current load percentage of each frame; calculating the current load percentage difference between each adjacent frame, and determining the target adjacent frame to be subjected to inter-frame tension adjustment in each adjacent frame according to the current load percentage difference between each adjacent frame; selecting a target inter-frame tension adjustment option for the target adjacent frame from the inter-frame tension adjustment options, and selecting a target adjustment action for the target adjacent frame from the adjustment action options; according to the target inter-frame tension adjustment option, adjusting the inter-frame tension of the target adjacent frame according to the target adjustment action, so as to adjust the current load percentage of each frame and reduce the risk of strip slippage in the cold rolling mill. The technical solution of the embodiment of the present application can efficiently adjust the current load percentage of the cold rolling mill, thereby effectively improving the slippage problem.

Description

Technical Field

[0001] The present application relates to the technical field of rolling processing, and in particular, to an operation control method for rolling steel in a cold rolling mill. Background Art

[0002] At present, frame slippage is a common problem in the production process of cold rolling mills, which has a great impact on product quality and production efficiency. However, operators lack the means to judge the initial stage of slippage and cannot effectively control the rolling state, so this impact has not been effectively solved in actual production. Based on this, how to prevent the strip from slipping during the cold rolling process is a technical problem that needs to be solved urgently. Summary of the invention

[0003] The purpose of the present application is to provide an operation control method for rolling steel in a cold rolling mill, thereby improving the current load percentage of the cold rolling mill, thereby effectively improving the slippage problem.

[0004] Other features and advantages of the present application will become apparent from the following detailed description, or may be learned in part by the practice of the present application.

[0005] According to one aspect of an embodiment of the present application, a method for controlling the operation of a cold rolling mill for rolling steel is provided, wherein the cold rolling mill comprises a first frame, a second frame, a third frame, a fourth frame, and a fifth frame arranged in sequence, and the method comprises: obtaining a rolling speed of the strip steel in the cold rolling mill; if the rolling speed is between 390 m / min and 410 m / min, obtaining a current load percentage of each frame in real time, wherein the current load percentage is a ratio between a current current load of the frame and a rated current load; calculating a current load percentage between adjacent frames; and calculating a current load percentage between adjacent frames. The invention relates to a method for adjusting the inter-rack tension of the target adjacent racks according to the percentage difference of the current load between the adjacent racks, and determining the target adjacent racks for inter-rack tension adjustment in the adjacent racks according to the percentage difference of the current load between the adjacent racks; selecting a target inter-rack tension adjustment option for the target adjacent rack from the inter-rack tension adjustment options, and selecting a target adjustment action for the target adjacent rack from the adjustment action options; adjusting the inter-rack tension of the target adjacent racks according to the target adjustment action according to the target inter-rack tension adjustment option, so as to adjust the current load percentage of each rack and reduce the risk of strip slippage in the tandem cold rolling mill.

[0006] In one embodiment of the present application, determining a target adjacent rack for inter-rack tension adjustment among the adjacent racks based on the current load percentage difference between the adjacent racks includes: if the current load percentage difference between the first rack and the second rack is between 0% and 40%, determining the first rack and the second rack as target adjacent racks.

[0007] In one embodiment of the present application, the method further includes: if the current load percentage difference between the first frame and the second frame is greater than 40%, stopping and replacing the rolling rollers of the first frame and the second frame to reduce the risk of strip slippage in the cold rolling mill.

[0008] In one embodiment of the present application, determining the target adjacent rack for inter-rack tension adjustment among the adjacent racks according to the current load percentage difference between the adjacent racks includes: if the current load percentage difference between the second rack and the third rack is between 5% and 10%, determining the second rack and the third rack as target adjacent racks.

[0009] In one embodiment of the present application, the method further includes: if the current load percentage difference between the second frame and the third frame is greater than 10%, stopping and replacing the rolling rollers of the second frame and the third frame to reduce the risk of strip slippage in the cold rolling mill.

[0010] In one embodiment of the present application, determining the target adjacent racks for inter-rack tension adjustment in each adjacent rack according to the current load percentage difference between each adjacent rack includes: if the current load percentage difference between the third rack and the fourth rack is between 5% and 10%, determining the third rack and the fourth rack as target adjacent racks.

[0011] In one embodiment of the present application, the method further includes: if the current load percentage difference between the third stand and the fourth stand is greater than 10%, stopping and replacing the rolling rollers of the third stand and the fourth stand to reduce the risk of strip slippage in the cold rolling mill.

[0012] In one embodiment of the present application, the inter-rack tension adjustment options include the following eight options:

[0013] The first one is to increase the tension between the first rack and the second rack to reduce the current load percentage of the first rack and increase the current load percentage of the second rack.

[0014] The second method is to reduce the tension between the first rack and the second rack to increase the current load percentage of the first rack and reduce the current load percentage of the second rack.

[0015] The third method is to increase the tension between the second rack and the third rack to reduce the current load percentage of the second rack and increase the current load percentage of the third rack.

[0016] A fourth method is to reduce the tension between the second rack and the third rack to increase the current load percentage of the second rack and reduce the current load percentage of the third rack.

[0017] Fifth, increasing the tension between the third rack and the fourth rack to reduce the current load percentage of the third rack and increase the current load percentage of the fourth rack.

[0018] Sixth, reducing the tension between the third rack and the fourth rack to increase the current load percentage of the third rack and reduce the current load percentage of the fourth rack.

[0019] Seventh, increasing the tension between the fourth rack and the fifth rack to reduce the current load percentage of the fourth rack and increase the current load percentage of the fifth rack.

[0020] Eighth, reducing the tension between the fourth rack and the fifth rack to increase the current load percentage of the fourth rack and reduce the current load percentage of the fifth rack.

[0021] In one embodiment of the present application, the adjustment action options include the following three types: a separate tension adjustment method between single racks, a tension adjustment method between adjacent racks in the same direction, and a tension adjustment method between cross-adjacent racks.

[0022] In one embodiment of the present application, when adjusting the inter-frame tension of the target adjacent frames, the method further includes: if the target adjacent frames include the first frame and the second frame, the adjustment range of the inter-frame tension is controlled between -100KN and +100KN so as not to destroy the continuous rolling state of the strip in the cold rolling mill; if the target adjacent frames include the second frame and the third frame, the adjustment range of the inter-frame tension is controlled between -100KN and +100KN. If the target adjacent frames include the third frame and the fourth frame, the adjustment range of the tension between the frames is controlled between -50KN and +50KN, so as not to destroy the continuous rolling state of the strip in the cold rolling mill; if the target adjacent frames include the fourth frame and the fifth frame, the adjustment range of the tension between the frames is controlled between -50KN and +50KN, so as not to destroy the continuous rolling state of the strip in the cold rolling mill.

[0023] In the technical solution of the embodiment of the present application, first, the rolling speed of the strip in the cold rolling mill is obtained. If the rolling speed is between 390m / min-410m / min, the current load percentage of each frame is obtained in real time, and the current load percentage is the ratio between the current current load of the frame and the rated current load. Then, the current load percentage difference between each adjacent frame is calculated, and according to the current load percentage difference between each adjacent frame, the target adjacent frame to be subjected to inter-frame tension adjustment is determined in each adjacent frame, and then the target inter-frame tension adjustment option is selected for the target adjacent frame from the inter-frame tension adjustment option, and the target adjustment action is selected for the target adjacent frame from the adjustment action option, and finally, according to the target inter-frame tension adjustment option, the inter-frame tension of the target adjacent frame is adjusted according to the target adjustment action, so as to adjust the current load percentage of each frame and reduce the risk of strip slipping in the cold rolling mill. In this way, by using the means of adjusting the inter-frame tension, the current load percentage of the cold rolling mill is improved, thereby effectively improving the slipping problem.

[0024] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present application, and together with the specification, are used to explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0026] Figure 1 The figure is a schematic diagram of the tension control principle between frames according to an embodiment of the present application. DETAILED DESCRIPTION

[0027] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this application will be more comprehensive and complete and fully convey the concept of the example embodiments to those skilled in the art.

[0028] In addition, described feature, structure or characteristic can be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present application. However, those skilled in the art will appreciate that the technical scheme of the present application can be put into practice without one or more of the specific details, or other methods, components, devices, steps, etc. can be adopted. In other cases, known methods, devices, realizations or operations are not shown or described in detail to avoid blurring the various aspects of the application.

[0029] The operations / steps described in this application are not necessarily executed in the order described. For example, some operations / steps may be decomposed, while some operations / steps may be combined or partially combined, so the actual execution order may change according to actual conditions.

[0030] It should be noted that the "multiple" mentioned in this article refers to two or more. "And / or" describes the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects before and after are in an "or" relationship.

[0031] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the objects used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those shown or described.

[0032] The implementation details of the technical solution of the embodiment of the present application are described in detail below:

[0033] In order to enable those skilled in the art to better understand the present application, a brief description of the tension control principle between stands of a cold rolling mill is given herein.

[0034] Combination Figure 1 , Figure 1 The schematic diagram of the tension control principle between frames according to the embodiment of the present application is shown in the schematic diagram of the tension control principle between frames according to the embodiment of the present application. Figure 1 In the embodiment, the two adjacent racks, the front rack and the rear rack, are taken as examples, and the state of the strip on the two adjacent racks is controlled by the front rack and the rear rack. The specific operation principle includes: the load is increased by increasing the pressure of the front rack, and the load is reduced by lifting and pressing the rear rack, so as to achieve the following Figure 1 Alternatively, the load is reduced by reducing the pressure of the front frame and the load is increased by increasing the pressure of the rear frame to achieve the effect of reducing tension; Figure 1 The effect of increasing tension is shown.

[0035] In the present application, a method for controlling the operation of a cold rolling mill for rolling steel is provided. The cold rolling mill comprises a first frame S1, a second frame S2, a third frame S3, a fourth frame S4, and a fifth frame S5 arranged in sequence. Before executing the method, it is necessary to eliminate the abnormalities caused by factors such as the frame transmission motor and other related equipment, rollers, pressure distribution, and emulsion. When there are no abnormalities in the frame transmission motor and other related equipment, rollers, pressure distribution, and emulsion, the following method can be executed:

[0036] First, the rolling speed of the steel strip in the tandem cold rolling mill is obtained.

[0037] If the rolling speed is between 390 m / min and 410 m / min, the current load percentage of each rack is obtained in real time, and the current load percentage is the ratio between the current current load of the rack and the rated current load.

[0038] Then, the current load percentage difference between each adjacent rack is calculated, and according to the current load percentage difference between each adjacent rack, the target adjacent rack for which the inter-rack tension adjustment is to be performed is determined among each adjacent rack.

[0039] Next, a target inter-rack tension adjustment option is selected for the target adjacent rack from inter-rack tension adjustment options, and a target adjustment action is selected for the target adjacent rack from adjustment action options.

[0040] Finally, according to the target inter-stand tension adjustment option, the inter-stand tension of the target adjacent stands is adjusted according to the target adjustment action to adjust the current load percentage of each stand and reduce the risk of strip slippage in the cold rolling mill.

[0041] Furthermore, when executing the method, the rolling speed can be controlled between 390m / min-410m / min, which is conducive to checking and solving the slipping problem and providing conditions for subsequent continued speed-up rolling. On the contrary, if the rolling speed is higher than 410m / min, the higher the rolling speed, the higher the risk of the frame slipping, which not only affects the processing quality, but also affects the rolling efficiency.

[0042] In addition, when obtaining the current load percentage of each rack, because the fifth rack adopts the flattening mode and its set pressing amount is not large, the current load of the fifth rack is lower than the rated current load value. At the same time, in the thickness control closed-loop mode, changing the tension between the fourth rack and the fifth rack will not change the current load of the fifth rack, so the current load difference between the fourth rack and the fifth rack is ignored and no adjustment is made; in addition, the difference in current load percentage between the second rack and the third rack, and the third rack and the fourth rack, is less than 5% compared with the front and rear racks, which will be regarded as being within the normal range, so no adjustment is made.

[0043] In the present application, the target adjacent racks to be subjected to inter-rack tension adjustment are determined in the adjacent racks according to the current load percentage difference between the adjacent racks, and may include the following six scenarios:

[0044] Scenario 1: If the current load percentage difference between the first rack and the second rack is between 0% and 40%, the first rack and the second rack are determined as target adjacent racks.

[0045] Scenario 2: If the current load percentage difference between the first stand and the second stand is greater than 40%, the first stand and the second stand rolling rolls are stopped and replaced to reduce the risk of strip slipping in the tandem cold mill.

[0046] Scenario 3: If the current load percentage difference between the second rack and the third rack is between 5% and 10%, the second rack and the third rack are determined as target adjacent racks.

[0047] Scenario 4: If the current load percentage difference between the second stand and the third stand is greater than 10%, the second stand and the third stand rolling rolls are stopped and replaced to reduce the risk of strip slipping in the tandem cold mill.

[0048] Scenario 5: If the current load percentage difference between the third rack and the fourth rack is between 5% and 10%, the third rack and the fourth rack are determined as target adjacent racks.

[0049] Scenario 6: If the current load percentage difference between the third stand and the fourth stand is greater than 10%, the third stand and the fourth stand rolling rolls are stopped and replaced to reduce the risk of strip slippage in the cold rolling mill.

[0050] Furthermore, in the above six scenarios, scenarios 2, 4 and 6 all belong to the situation of serious slippage, which is often caused by serious wear of the rolling rollers, so it is necessary to stop the machine to replace new rolling rollers, and then re-execute the method provided in this application after the replacement is completed. In the case of scenarios 1, 3 and 5, it means that there is a risk of slippage of the strip in the rack, and the tension between the racks needs to be adjusted in a targeted manner.

[0051] Specifically, as mentioned above, the inter-rack tension adjustment options may include the following eight types:

[0052] The first one is to increase the tension between the first rack and the second rack to reduce the current load percentage of the first rack and increase the current load percentage of the second rack.

[0053] The second method is to reduce the tension between the first rack and the second rack to increase the current load percentage of the first rack and reduce the current load percentage of the second rack.

[0054] The third method is to increase the tension between the second rack and the third rack to reduce the current load percentage of the second rack and increase the current load percentage of the third rack.

[0055] A fourth method is to reduce the tension between the second rack and the third rack to increase the current load percentage of the second rack and reduce the current load percentage of the third rack.

[0056] Fifth, increasing the tension between the third rack and the fourth rack to reduce the current load percentage of the third rack and increase the current load percentage of the fourth rack.

[0057] Sixth, reducing the tension between the third rack and the fourth rack to increase the current load percentage of the third rack and reduce the current load percentage of the fourth rack.

[0058] Seventh, tension between the fourth rack and the fifth rack is used to reduce the current load percentage of the fourth rack and increase the current load percentage of the fifth rack.

[0059] Eighth, reducing the tension between the fourth rack and the fifth rack to increase the current load percentage of the fourth rack and reduce the current load percentage of the fifth rack.

[0060] Among them, when adjusting the tension between frames, the control functions that can be used are shown in the following table:

[0061]

[0062] Furthermore, it can be divided into fine adjustment and continuous adjustment. Fine adjustment means triggering the operating stick for 2 seconds to increase / decrease the tension by 1% and then quickly withdrawing it, i.e. tension fine (+) and tension fine (-); continuous adjustment means continuously moving the operating stick to increase / decrease the tension by 1% in 2 seconds, i.e. tension (+) and tension (-). During operation, fine adjustment is often used first, triggered for 2 seconds, and checked whether the adjustment direction is normal, and then continuous adjustment is used.

[0063] In this application, the adjustment action options may include the following three types: single rack tension adjustment method, same-direction adjacent rack tension adjustment method, cross-adjacent rack tension adjustment method. Therefore, the current load table of the adjustment rack can be listed as follows:

[0064]

[0065] In the present application, when adjusting the inter-frame tension of the target adjacent frames, the method may further include: if the target adjacent frames include the first frame and the second frame, the adjustment range of the inter-frame tension is controlled between -100KN and +100KN so as not to destroy the continuous rolling state of the strip in the cold rolling mill; if the target adjacent frames include the second frame and the third frame, the adjustment range of the inter-frame tension is controlled between -100KN and +100KN, So as not to destroy the continuous rolling state of the strip in the cold rolling mill; if the target adjacent frames include the third frame and the fourth frame, the adjustment range of the tension between the frames is controlled between -50KN and +50KN, so as not to destroy the continuous rolling state of the strip in the cold rolling mill; if the target adjacent frames include the fourth frame and the fifth frame, the adjustment range of the tension between the frames is controlled between -50KN and +50KN, so as not to destroy the continuous rolling state of the strip in the cold rolling mill.

[0066] In order to enable those skilled in the art to better understand the present application, the present application will be described below with three specific embodiments.

[0067] Embodiment 1:

[0068] The rolling speed of the cold rolling mill is 402m / min, and the following parameters are obtained:

[0069]

[0070] From the above parameters, it can be seen that the current load percentage difference between S1 and S2 is 22%, which is between 0% and 40%, so S1 and S2 are determined as target adjacent racks. Within this range, the current load difference of S1 is low and does not belong to slippage, so the current load of S2 is increased; the current load percentage difference between S2 and S3 is 7%, which is between 5% and 10%, so S2 and S3 are determined as target adjacent racks, and the current load of S2 is increased and the current load of S3 is reduced; the current load percentage difference between S3 and S4 is 5%, which is between 5% and 10%, so S3 and S4 are determined as target adjacent racks, and the current load of S3 is reduced and the current load of S4 is increased.

[0071] Since S2 increases the current load, S3 decreases the current load, and S4 increases the current load, the tension between the four racks will be adjusted to increase or decrease at the same time, which can form two pairs of cross adjustments, so the tension adjustment option between racks can be selected:

[0072] The S1-S2 tension (+) reduces the current load of S1 and increases the current load of S2.

[0073] The S2-S3 tension (-) increases the current load of S2 and reduces the current load of S3.

[0074] S3-S4 tension (+) reduces the current load of S3 and increases the current load of S4.

[0075] The S4-S5 tension (-) increases the current load of S4 and reduces the current load of S5.

[0076] At the same time, a cross-adjacent rack tension adjustment method is adopted, first using a fine-tuning trigger for 2 seconds, and then using a continuous adjustment method to implement the above-mentioned rack tension adjustment option, wherein the tension adjustment range is increased / decreased by 1% every 2 seconds.

[0077] Moreover, during the operation, the adjustment range of S1-S2 and S2-S3 is controlled between -100KN and +100KN, and the adjustment range of S3-S4 and S4-S5 is controlled between -50KN and +50KN, so as not to destroy the continuous rolling state of the strip in the cold rolling mill.

[0078] The parameters after adjustment are as follows:

[0079]

[0080] By implementing the above adjustment method, the difference between the current load percentages of each frame of the cold rolling mill returns to the normal range, the adjustment is effective, and the existing parameters are maintained.

[0081] Embodiment 2:

[0082] The rolling speed of the cold rolling mill is 406m / min, and the following parameters are obtained:

[0083]

[0084] From the above parameters, it can be seen that the current load percentage difference between S1 and S2 is 11%, which is between 0% and 40%, so S1 and S2 are determined as target adjacent racks. The low current load difference of S1 within this range does not belong to slippage, so the current load of S1 is reduced and the current load of S2 is increased; the current load percentage difference between S2 and S3 is 6%, which is between 5% and 10%, so S2 and S3 are determined as target adjacent racks, and the current load of S2 is increased and the current load of S3 is reduced; the current load percentage difference between S3 and S4 is 9%, which is between 5% and 10%, so S3 and S4 are determined as target adjacent racks, and the current load of S3 is reduced and the current load of S4 is increased.

[0085] Since S1 reduces the current load, S2 increases the current load, S3 reduces the current load, and S4 increases the current load, the tension between the four racks will be increased or decreased at the same time, which can form two pairs of cross adjustments, so the tension adjustment option between racks can be selected:

[0086] The S1-S2 tension (+) reduces the current load of S1 and increases the current load of S2.

[0087] The S2-S3 tension (-) increases the current load of S2 and reduces the current load of S3.

[0088] S3-S4 tension (+) reduces the current load of S3 and increases the current load of S4.

[0089] The S4-S5 tension (-) increases the current load of S4 and reduces the current load of S5.

[0090] At the same time, a cross-adjacent rack tension adjustment method is adopted, first using a fine-tuning trigger for 2 seconds, and then using a continuous adjustment method to implement the above-mentioned rack tension adjustment option, wherein the tension adjustment range is increased / decreased by 1% every 2 seconds.

[0091] Moreover, during the operation, the adjustment range of S1-S2 and S2-S3 is controlled between -100KN and +100KN, and the adjustment range of S3-S4 and S4-S5 is controlled between -50KN and +50KN, so as not to destroy the continuous rolling state of the strip in the cold rolling mill.

[0092] The parameters after adjustment are as follows:

[0093]

[0094] By implementing the above adjustment method, the difference between the current load percentages of each frame of the cold rolling mill returns to the normal range, the adjustment is effective, and the existing parameters are maintained.

[0095] Embodiment three:

[0096] The rolling speed of the cold rolling mill is 395m / min, and the following parameters are obtained:

[0097]

[0098]

[0099] From the above parameters, it can be seen that the current load percentage difference between S1 and S2 is 45%, which is greater than 40%. Therefore, it can be determined that S1 is seriously slipping. The machine should be shut down and replaced with a new rolling roller, and then the method described in this application should be used again for analysis and processing.

[0100] To sum up, in the technical scheme of the embodiment of the present application, first, the rolling speed of the strip in the cold rolling mill is obtained. If the rolling speed is between 390m / min-410m / min, the current load percentage of each frame is obtained in real time, and the current load percentage is the ratio of the current current load of the frame to the rated current load. Then, the current load percentage difference between each adjacent frame is calculated, and according to the current load percentage difference between each adjacent frame, the target adjacent frame to be subjected to inter-frame tension adjustment is determined in each adjacent frame, and then the target inter-frame tension adjustment option is selected for the target adjacent frame from the inter-frame tension adjustment options, and the target adjustment action is selected for the target adjacent frame from the adjustment action options. Finally, according to the target inter-frame tension adjustment option, the inter-frame tension of the target adjacent frame is adjusted according to the target adjustment action to adjust the current load percentage of each frame and reduce the risk of strip slippage in the cold rolling mill. In this way, by adjusting the tension between the stands, the current load percentage of the cold rolling mill can be improved, thereby effectively improving the slip problem.

[0101] In addition, the above-mentioned figures are only schematic illustrations of the processes included in the method according to the exemplary embodiments of the present application, and are not intended to be limiting. It is easy to understand that the processes shown in the above-mentioned figures do not indicate or limit the time sequence of these processes. In addition, it is also easy to understand that these processes can be performed synchronously or asynchronously, for example, in multiple modules.

[0102] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be performed without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A method for controlling the operation of a cold rolling mill, characterized in that: The cold rolling mill comprises a first frame, a second frame, a third frame, a fourth frame, and a fifth frame arranged in sequence, and the method comprises: Obtaining the rolling speed of the strip steel in the cold rolling mill; If the rolling speed is between 390m / min-410m / min, the current load percentage of each rack is obtained in real time, and the current load percentage is the ratio between the current current load of the rack and the rated current load; Calculating the current load percentage difference between each adjacent rack, and determining the target adjacent rack for inter-rack tension adjustment among each adjacent rack according to the current load percentage difference between each adjacent rack; Selecting a target inter-rack tension adjustment option for the target adjacent rack from inter-rack tension adjustment options, and selecting a target adjustment action for the target adjacent rack from adjustment action options; According to the target inter-stand tension adjustment option, the inter-stand tension of the target adjacent stands is adjusted according to the target adjustment action to adjust the current load percentage of each stand and reduce the risk of strip slippage in the cold rolling mill; Determining a target adjacent rack for inter-rack tension adjustment in each adjacent rack according to the current load percentage difference between each adjacent rack includes: If the current load percentage difference between the first rack and the second rack is between 0% and 40%, determining the first rack and the second rack as target adjacent racks; If the current load percentage difference between the second rack and the third rack is between 5% and 10%, determining the second rack and the third rack as target adjacent racks; If the current load percentage difference between the third rack and the fourth rack is between 5% and 10%, the third rack and the fourth rack are determined as target adjacent racks.

2. The method according to claim 1, characterized in that The method further comprises: If the current load percentage difference between the first stand and the second stand is greater than 40%, the rolling rolls of the first stand and the second stand are stopped and replaced to reduce the risk of strip slippage in the cold rolling mill.

3. The method according to claim 1, characterized in that The method further comprises: If the current load percentage difference between the second stand and the third stand is greater than 10%, the second stand and the third stand rolling rolls are stopped and replaced to reduce the risk of strip slippage in the tandem cold rolling mill.

4. The method according to claim 1, characterized in that: The method further comprises: If the current load percentage difference between the third stand and the fourth stand is greater than 10%, the third stand and the fourth stand rolling rolls are stopped and replaced to reduce the risk of strip slippage in the cold rolling mill.

5. The method according to claim 1, characterized in that The inter-rack tension adjustment options include the following eight options: Increasing the tension between the first rack and the second rack to reduce the current load percentage of the first rack and increase the current load percentage of the second rack; Reducing the tension between the first rack and the second rack to increase the current load percentage of the first rack and reduce the current load percentage of the second rack; Increasing the tension between the second rack and the third rack to reduce the current load percentage of the second rack and increase the current load percentage of the third rack; reducing the tension between the second rack and the third rack to increase the current load percentage of the second rack and reduce the current load percentage of the third rack; Increasing the tension between the third rack and the fourth rack to reduce the current load percentage of the third rack and increase the current load percentage of the fourth rack; reducing the tension between the third rack and the fourth rack to increase the current load percentage of the third rack and reduce the current load percentage of the fourth rack; Increasing the tension between the fourth rack and the fifth rack to reduce the current load percentage of the fourth rack and increase the current load percentage of the fifth rack; The tension between the fourth rack and the fifth rack is reduced to increase the current load percentage of the fourth rack and reduce the current load percentage of the fifth rack.

6. The method according to claim 1, characterized in that The adjustment action options include the following three types: a separate tension adjustment method between single racks, a tension adjustment method between adjacent racks in the same direction, and a tension adjustment method between cross-adjacent racks.

7. The method according to claim 1, characterized in that When adjusting the inter-rack tension of the target adjacent racks, the method further includes: If the target adjacent racks include the first rack and the second rack, the adjustment range of the tension between the racks is controlled between -100 KN and +100 KN so as not to destroy the continuous rolling state of the strip in the cold rolling mill; If the target adjacent racks include the second rack and the third rack, the adjustment range of the tension between the racks is controlled between -100 KN and +100 KN so as not to damage the continuous rolling state of the strip in the cold rolling mill; If the target adjacent racks include the third rack and the fourth rack, the adjustment range of the tension between the racks is controlled between -50 KN and +50 KN so as not to damage the continuous rolling state of the strip in the cold rolling mill; If the target adjacent racks include the fourth rack and the fifth rack, the adjustment range of the tension between the racks is controlled between -50 KN and +50 KN so as not to destroy the continuous rolling state of the strip in the cold rolling mill.

Images