A strip thickness control method, device and apparatus

Abstract

This invention provides a method, apparatus, and device for controlling strip thickness. First, a thickness monitoring interval for the target strip is determined along a direction perpendicular to the strip's movement direction. One end of the thickness monitoring interval is located at the edge of the target strip, and the width of the thickness monitoring interval is less than half the width of the target strip. Next, the actual thickness values ​​of the target strip at multiple plate width positions within the thickness monitoring interval are obtained, where the distance between each plate width position and the edge of the target strip is different. If any actual thickness value is not within the thickness control threshold range, the roll shifting adjustment of the mill work rolls is controlled based on the actual thickness value, the thickness control threshold range, and a preset roll shifting influence coefficient. This allows for more flexible control of the transverse thickness difference of the strip, thereby effectively improving the transverse control accuracy of the rolled strip.

Description

Technical Field

[0001] This invention relates to the field of rolling technology, and in particular to a method, apparatus and equipment for controlling strip thickness. Background Technology

[0002] Transverse thickness difference is an important quality indicator of strip steel, as it affects the lamination coefficient of the product and the performance of the motor.

[0003] For the control of transverse thickness difference of strip steel, the existing technology is based on the thickness difference between 115mm and 15mm from the edge of the strip steel for automatic control. However, since these two positions are both within the edge drop zone of the strip steel, the control accuracy of transverse thickness difference of the strip steel is not high and cannot meet the requirements of high-precision transverse thickness difference control.

[0004] To improve the accuracy of transverse thickness difference control of strip steel, a new transverse thickness difference control method is urgently needed to overcome the problems existing in the current transverse thickness difference control method. Summary of the Invention

[0005] The present invention provides a method, apparatus and equipment for controlling strip thickness, thereby solving the technical problem of low accuracy in controlling transverse thickness difference of existing strips.

[0006] In a first aspect, the present invention provides a strip thickness control method applied to a rolling mill through an embodiment of the present invention. The method includes: determining a thickness monitoring interval for the target strip along a direction perpendicular to the movement direction of the target strip; wherein one end of the thickness monitoring interval is located at the edge of the target strip, and the width of the thickness monitoring interval is less than half the width of the target strip; obtaining actual thickness values ​​of the target strip at multiple plate width positions within the thickness monitoring interval; wherein the distance between each plate width position and the edge of the target strip is different; if any of the actual thickness values ​​is not within the thickness control threshold range, then controlling the roll shifting adjustment amount of the rolling mill work rolls based on the actual thickness value, the thickness control threshold range, and a preset roll shifting influence coefficient.

[0007] Optionally, obtaining the actual thickness value of the target strip at multiple plate width positions within the thickness monitoring interval includes: determining multiple plate width positions within the thickness monitoring interval, wherein the distance between two adjacent plate width positions is consistent; and obtaining the actual thickness value of the target strip at the multiple plate width positions.

[0008] Optionally, the method further includes: if the average of the multiple actual thickness values ​​is not within the thickness control threshold range, then controlling the roll shift adjustment amount of the mill work roll based on the actual thickness value, the thickness control threshold range, and the roll shifting influence coefficient.

[0009] Optionally, controlling the roll shifting adjustment amount of the mill work roll based on the actual thickness value, the thickness control threshold range, and a preset roll shifting influence coefficient includes: calculating the difference between the actual thickness value and the average thickness control threshold, wherein the average thickness control threshold is half the sum of the upper limit of the thickness control threshold range and the lower limit of the thickness control threshold range; and controlling the roll shifting adjustment amount of the mill work roll based on the ratio of the difference to the roll shifting influence coefficient.

[0010] Optionally, the method further includes: calculating the thickness warping amount based on the actual thickness values ​​at the plurality of plate width positions, and determining whether the target strip has experienced thickness warping based on the plurality of plate width positions and the corresponding actual thickness values; if so, determining the warping work roll shifting amount based on the thickness warping amount and the shifting roll influence coefficient, and controlling the rolling mill based on the warping work roll shifting amount.

[0011] Optionally, calculating the thickness warping amount based on the actual thickness values ​​at the plurality of plate width positions includes: calculating the thickness warping amount using the largest actual thickness value and the smallest actual thickness value at the plurality of plate width positions.

[0012] Optionally, determining whether the target strip has experienced thickness warping based on the plurality of plate width positions and corresponding actual thickness values ​​includes: determining a first distance between the plate width position corresponding to the maximum actual thickness value and the edge of the target strip, and determining a second distance between the plate width position corresponding to the minimum actual thickness value and the edge of the target strip; and determining whether the target strip has experienced thickness warping by comparing the magnitude of the first distance and the second distance.

[0013] Optionally, before determining the amount of roll shifting of the anti-warping work roll based on the thickness anti-warping amount and the roll shifting influence coefficient, the method further includes: determining whether the thickness anti-warping amount is greater than a preset upper limit value of anti-warping amount, and determining whether the absolute value of the difference between the first distance and the second distance is less than or equal to a preset thickness anti-warping position control distance; if the determination results are both yes, then the step of determining the amount of roll shifting of the anti-warping work roll based on the thickness anti-warping amount and the roll shifting influence coefficient is performed.

[0014] Secondly, through one embodiment of the present invention, a strip thickness control device is provided for use in a rolling mill, the device comprising:

[0015] A strip thickness monitoring unit is used to determine the thickness monitoring range of the target strip in a direction perpendicular to the direction of movement of the target strip; wherein one end of the thickness monitoring range is located at the edge of the target strip, and the width of the thickness monitoring range is less than half the width of the target strip;

[0016] The strip thickness monitoring unit is also used to obtain the actual thickness value of the target strip at multiple plate width positions within the thickness monitoring interval; wherein the distance between each plate width position and the edge of the target strip is different;

[0017] The rolling control unit is used to control the roll shift adjustment amount of the mill work roll based on the actual thickness value, the thickness control threshold range, and a preset roll shifting influence coefficient when any of the actual thickness values ​​is detected to be outside the thickness control threshold range.

[0018] Thirdly, through one embodiment of the present invention, a strip thickness control device is provided, including a memory, a processor, and code stored in the memory and executable on the processor, wherein the processor executes the code to implement any of the embodiments in the first aspect.

[0019] One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages:

[0020] First, a thickness monitoring interval for the target strip is determined along a direction perpendicular to the strip's movement direction. One end of this interval is located at the edge of the target strip, and the width of the interval is less than half the width of the target strip. Next, the actual thickness values ​​of the target strip are acquired at multiple width positions within the thickness monitoring interval, where the distance between each width position and the edge of the target strip is different. If any actual thickness value is outside the thickness control threshold range, the roll shifting adjustment of the mill work rolls is controlled based on the actual thickness value, the thickness control threshold range, and a preset roll shifting influence coefficient.

[0021] In addition, the thickness warping amount can be calculated based on the actual thickness values ​​at multiple plate width positions, and it can be determined whether the target strip has thickness warping based on the multiple plate width positions and the corresponding actual thickness values; if so, the warping work roll skew amount can be determined based on the thickness warping amount and the skew roll influence coefficient, and the mill can be controlled based on the warping work roll skew amount.

[0022] In summary, the strip thickness control method provided by the embodiments of the present invention can more flexibly control the transverse thickness difference of the strip, effectively improving the transverse control accuracy of the strip rolling mill. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a flowchart of the strip thickness control method in an embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the thickness monitoring range on the target strip in an embodiment of the present invention;

[0026] Figure 3 This is a schematic diagram of the strip thickness control device structure in an embodiment of the present invention;

[0027] Figure 4 This is a schematic diagram of the strip thickness control device structure in an embodiment of the present invention. Detailed Implementation

[0028] The present invention provides a method, apparatus and equipment for controlling strip thickness, thereby solving the technical problem of low accuracy in controlling transverse thickness difference of existing strips.

[0029] The technical solution provided by the embodiments of the present invention is to solve the above-mentioned technical problems, and the general idea is as follows:

[0030] First, the thickness monitoring range of the target strip is determined along a direction perpendicular to the direction of movement of the target strip. One end of the thickness monitoring range is located at the edge of the target strip, and the width of the thickness monitoring range is less than half the width of the target strip.

[0031] Next, the actual thickness values ​​of the target strip are obtained at multiple width positions within the thickness monitoring range, where the distance between each width position and the edge of the target strip is different. If any actual thickness value is not within the thickness control threshold range, the roll shifting adjustment of the mill work rolls is controlled based on the actual thickness value, the thickness control threshold range, and the preset roll shifting influence coefficient.

[0032] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0033] First, it should be clarified that the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0034] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the invention described herein can be implemented in sequences other than those illustrated or described herein.

[0035] In a first aspect, the present invention provides a strip thickness control method through an embodiment of the invention, applied to a rolling mill, as shown in the figure below. Figure 1 As shown, the strip thickness control method may include the following steps:

[0036] Step S101: Determine the thickness monitoring range of the target strip along the direction perpendicular to the movement direction of the target strip.

[0037] Please see, for example Figure 2 As shown, one end of the thickness monitoring interval is located at the edge of the target strip, and the width of the thickness monitoring interval is less than half the width of the target strip.

[0038] In the specific implementation process, since the target strip is rolled on the rolling mill, which is equipped with a working side and a drive side, a thickness monitoring range can be set on the working side of the target strip and a thickness monitoring range can be set on the drive side of the target strip.

[0039] In one alternative implementation, the width of the thickness monitoring zone can be 80 millimeters.

[0040] Step S102: Obtain the actual thickness values ​​of the target strip at multiple plate width positions within the thickness monitoring range.

[0041] The distance between each plate width position and the edge of the target strip is different.

[0042] Specifically, multiple plate width positions can be determined within the thickness monitoring range, with the distance between two adjacent plate width positions being consistent, and then the actual thickness value of the target strip steel at multiple plate width positions can be obtained.

[0043] In practice, the number of plate width positions can be determined based on the width of the thickness monitoring interval and / or the thickness difference control accuracy. Understandably, the more plate width positions there are, the more accurate the final transverse thickness difference control of the strip will be.

[0044] In one alternative implementation, the distance between two adjacent plate width positions can be set to 10 mm.

[0045] Step S103: If any actual thickness value is not within the thickness control threshold range, then the roll shift adjustment amount of the mill work roll is controlled based on the actual thickness value, the thickness control threshold range, and the preset roll shifting influence coefficient.

[0046] The thickness control threshold range can be set according to actual rolling requirements. In one optional embodiment, the lower limit of the thickness control threshold range can be 0.506 mm, and the upper limit of the thickness control threshold range can be 0.508 mm.

[0047] The roll shifting influence coefficient can be set according to the actual rolling requirements. In one optional implementation, the roll shifting influence coefficient can be 0.3.

[0048] As an optional implementation, if the average of multiple actual thickness values ​​is not within the thickness control threshold range, the roll shift adjustment amount of the mill work roll is controlled based on the actual thickness value, the thickness control threshold range, and the roll shifting influence coefficient.

[0049] Regarding how to control the roll shifting adjustment amount of the rolling mill work roll based on the actual thickness value, the thickness control threshold range, and the preset roll shifting influence coefficient, specifically, the difference between the actual thickness value and the average thickness control threshold can be calculated first. The average thickness control threshold is half the sum of the upper limit and the lower limit of the thickness control threshold range. Then, the roll shifting adjustment amount of the rolling mill work roll is controlled based on the ratio of this difference to the roll shifting influence coefficient.

[0050] For example, the roller adjustment amount can be calculated using the following formula:

[0051] L 窜辊 =(h 实际 ―h′)×1000 / α

[0052] In the above formula, L 窜辊 h is the adjustment amount for the roller shifting. 实际 denoted as the actual thickness value, h′ as the average thickness control threshold, and α as the roller slippage influence coefficient.

[0053] For example, suppose the actual thickness values ​​of the target strip at multiple width positions within the thickness monitoring range are as shown in Table 1 below:

[0054] Table 1. Schematic diagram of actual thickness values ​​corresponding to different plate width positions in one embodiment.

[0055]

[0056]

[0057] If the lower limit of the thickness control threshold range is 0.504 mm and the upper limit of the thickness control threshold range is 0.512 mm, then the mill can be controlled to roll the target strip normally.

[0058] If the lower limit of the thickness control threshold range is 0.506 mm and the upper limit of the thickness control threshold range is 0.508 mm, then there are actual thickness values ​​that are not within the thickness control threshold range, and there are also multiple actual thickness values ​​whose average value is not within the thickness control threshold range.

[0059] At this point, you can choose an actual thickness value or calculate the average of multiple actual thickness values. If the selected actual thickness value is 0.5091 mm, then the corresponding roller adjustment amount of 7 mm can be calculated using the above step S103.

[0060] As an optional implementation, the thickness warping amount can be calculated based on the actual thickness values ​​at multiple plate width positions, and it can be determined whether the target strip has experienced thickness warping based on the multiple plate width positions and the corresponding actual thickness values. If so, the warping work roll shifting amount is determined based on the thickness warping amount and the roll shifting influence coefficient, and the mill is controlled based on the warping work roll shifting amount.

[0061] Specifically, the amount of anti-warping work roll movement can be determined based on the ratio of the thickness anti-warping amount to the roll movement influence coefficient.

[0062] For example, the amount of anti-tilting work roll shifting can be calculated using the following formula:

[0063] L 反翘窜辊 =L 反翘 ×1000 / α

[0064] In the above formula, L 反翘窜辊 L is the amount of anti-tilting work roll shifting. 反翘 α represents the thickness warping amount, and α is the influence coefficient of the roller shifting.

[0065] Regarding how to calculate the thickness warping amount based on the actual thickness values ​​at multiple board width locations, specifically, the thickness warping amount can be calculated using the largest and smallest actual thickness values ​​at multiple board width locations.

[0066] In the specific implementation process, the first distance between the plate width position corresponding to the maximum actual thickness value and the edge of the target strip can be determined first, and the second distance between the plate width position corresponding to the minimum actual thickness value and the edge of the target strip can be determined. Then, by comparing the size of the first distance and the second distance, it can be determined whether the target strip has experienced thickness warping.

[0067] Specifically, if the first distance is less than the second distance, it is determined that the target strip has experienced thickness warping.

[0068] As an optional implementation, before determining the amount of roll shifting of the anti-warping work roll based on the thickness anti-warping amount and the roll shifting influence coefficient, it is also possible to determine whether the thickness anti-warping amount is greater than the preset upper limit of anti-warping amount, and whether the absolute value of the difference between the first distance and the second distance is less than or equal to the preset thickness anti-warping position control distance; if the determination results are both yes, then the step of determining the amount of roll shifting of the anti-warping work roll based on the thickness anti-warping amount and the roll shifting influence coefficient is executed.

[0069] The upper limit of the anti-warping amount can be set according to the actual application scenario. In one optional implementation, the upper limit of the anti-warping amount can be 0.002 mm. The thickness anti-warping position control distance can be set according to the actual application scenario. In one optional implementation, the thickness anti-warping position control distance can be 20 mm.

[0070] For example, if the maximum actual thickness of the target strip within 80 mm of its edge is 0.5101 mm, and the corresponding width (distance from the edge of the target strip) is 25 mm, and the minimum actual thickness of the target strip within 80 mm of its edge is 0.5062 mm, and the corresponding width (distance from the edge of the target strip) is 35 mm, then the warping amount is 0.0039 mm.

[0071] Since the plate width position corresponding to the maximum actual thickness value is smaller than the plate width position corresponding to the minimum actual thickness value, it is determined that the target strip has experienced thickness warping.

[0072] If the upper limit of the anti-warping amount is 0.002 mm and the thickness anti-warping position control distance is 20 mm, since the anti-warping amount is greater than the upper limit of the anti-warping amount, and the difference between the plate width position corresponding to the maximum actual thickness value and the plate width position corresponding to the minimum actual thickness value is less than the thickness anti-warping position control distance, the anti-warping work roll shifting amount is calculated to be 13 mm using the above calculation formula. Finally, the anti-warping work roll shifting amount is used to control the work roll shifting of the rolling mill.

[0073] Secondly, based on the same inventive concept, this invention provides a strip thickness control device through one embodiment, applied to a rolling mill, as shown in the figure below. Figure 3 As shown, the strip thickness control device may include:

[0074] The strip thickness monitoring unit 301 is used to determine the thickness monitoring range of the target strip in a direction perpendicular to the movement direction of the target strip; wherein, one end of the thickness monitoring range is located at the edge of the target strip, and the width of the thickness monitoring range is less than half the width of the target strip.

[0075] The strip thickness monitoring unit 301 is also used to obtain the actual thickness values ​​of the target strip at multiple plate width positions within the thickness monitoring range; wherein, the distance between each plate width position and the edge of the target strip is different;

[0076] The rolling control unit 302 is used to control the roll shift adjustment amount of the rolling mill work roll based on the actual thickness value, the thickness control threshold range, and the preset roll shifting influence coefficient when any actual thickness value is detected to be outside the thickness control threshold range.

[0077] As an optional implementation, the strip thickness monitoring unit 301 is specifically used for:

[0078] Multiple plate width positions are determined within the thickness monitoring range, with the distance between two adjacent plate width positions being consistent; the actual thickness value of the target strip steel at multiple plate width positions is obtained.

[0079] As an optional implementation, the rolling control unit 302 is also used for:

[0080] When the average of multiple actual thickness values ​​is not within the thickness control threshold range, the amount of roll shifting adjustment of the mill work roll is controlled based on the actual thickness value, the thickness control threshold range, and the roll shifting influence coefficient.

[0081] As an optional implementation, the rolling control unit 302 is specifically used for:

[0082] Calculate the difference between the actual thickness value and the average thickness control threshold, which is half the sum of the upper limit and lower limit of the thickness control threshold range. Based on the ratio of the difference to the roll shifting influence coefficient, control the roll shifting adjustment of the mill work roll.

[0083] As an optional implementation, the rolling control unit 302 is also specifically used for:

[0084] The thickness warping amount is calculated based on the actual thickness values ​​at multiple plate width positions, and it is determined whether the target strip has thickness warping based on the multiple plate width positions and the corresponding actual thickness values. If so, the warping work roll skew amount is determined based on the thickness warping amount and the skew roll influence coefficient, and the mill is controlled based on the warping work roll skew amount.

[0085] The thickness warping amount is calculated based on the actual thickness values ​​at multiple plate width locations. Specifically, the thickness warping amount can be calculated using the largest and smallest actual thickness values ​​at multiple plate width locations.

[0086] To determine whether the target strip has experienced thickness warping, the following steps can be taken: First, determine the first distance between the plate width position corresponding to the maximum actual thickness value and the edge of the target strip, and second, determine the second distance between the plate width position corresponding to the minimum actual thickness value and the edge of the target strip. Then, by comparing the magnitudes of the first and second distances, it can be determined whether the target strip has experienced thickness warping.

[0087] As an optional implementation, the rolling control unit 302 is also specifically used for:

[0088] Before determining the amount of roll shifting of the anti-warping work roll based on the thickness anti-warping amount and the roll shifting influence coefficient, it is determined whether the thickness anti-warping amount is greater than the preset upper limit of anti-warping amount, and whether the absolute value of the difference between the first distance and the second distance is less than or equal to the preset thickness anti-warping position control distance; if the determination results are both yes, then the step of determining the amount of roll shifting of the anti-warping work roll based on the thickness anti-warping amount and the roll shifting influence coefficient is executed.

[0089] Since the strip thickness control device described in this embodiment is an electronic device used to implement the strip thickness control method in this embodiment of the invention, those skilled in the art can understand the specific implementation and various variations of the electronic device in this embodiment based on the strip thickness control method described in this embodiment of the invention. Therefore, how the electronic device implements the method in this embodiment of the invention will not be described in detail here. Any electronic device used by those skilled in the art to implement the strip thickness control method in this embodiment of the invention falls within the scope of protection of this invention.

[0090] Thirdly, based on the same inventive concept, the embodiments of the present invention provide a strip thickness control device that can be applied to rolling mills.

[0091] refer to Figure 4 As shown, the strip thickness control device provided in this embodiment of the invention includes: a memory 401, a processor 402, and code stored in the memory and executable on the processor 402. When the processor 402 executes the code, it implements any of the embodiments of the strip thickness control method described above.

[0092] Among them, Figure 4 In this document, a bus architecture (represented by bus 400) is used. Bus 400 may include any number of interconnected buses and bridges, linking various circuits including one or more processors represented by processor 402 and memory represented by memory 401. Bus 400 may also link various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein. Bus interface 405 provides an interface between bus 400 and receiver 403 and transmitter 404. Receiver 403 and transmitter 404 may be the same element, i.e., a transceiver, providing a unit for communicating with various other devices over a transmission medium. Processor 402 is responsible for managing bus 400 and general processing, while memory 401 can be used to store data used by processor 402 during operation.

[0093] The technical solutions in the above embodiments of the present invention have at least the following technical effects or advantages:

[0094] If any actual thickness value is outside the thickness control threshold range, the roll shifting adjustment of the mill work rolls is controlled based on the actual thickness value, the thickness control threshold range, and the preset roll shifting influence coefficient. The thickness warping amount is also calculated based on the actual thickness values ​​at multiple strip width positions, and it is determined whether the target strip has experienced thickness warping based on these multiple strip width positions and their corresponding actual thickness values. If so, the warping work roll shifting amount is determined based on the thickness warping amount and the roll shifting influence coefficient, and the mill is controlled based on this amount. This allows for more flexible control of the transverse thickness difference of the strip, thereby effectively improving the transverse control accuracy of the mill in strip rolling.

[0095] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable code.

[0096] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer instructions. These computer instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0097] These computer instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0098] These computer instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1The steps of the function specified in one or more boxes.

[0099] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.

[0100] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A method for controlling strip thickness, characterized in that, Applied to a rolling mill, the method includes: The thickness monitoring range of the target strip is determined along a direction perpendicular to the direction of movement of the target strip; wherein one end of the thickness monitoring range is located at the edge of the target strip, and the width of the thickness monitoring range is less than half the width of the target strip; The actual thickness values ​​of the target strip are obtained at multiple plate width positions within the thickness monitoring range; wherein the distance between each plate width position and the edge of the target strip is different; If any of the actual thickness values ​​is not within the thickness control threshold range, the roll shift adjustment amount of the mill work roll is controlled based on the actual thickness value, the thickness control threshold range, and the preset roll shifting influence coefficient. The step of controlling the roll shift adjustment amount of the mill work roll based on the actual thickness value, the thickness control threshold range, and the preset roll shifting influence coefficient includes: Calculate the difference between the actual thickness value and the average thickness control threshold, where the average thickness control threshold is half the sum of the upper limit of the thickness control threshold range and the lower limit of the thickness control threshold range; The adjustment amount of the mill work roll shifting is controlled using the following formula, based on the ratio of the difference to the roll shifting influence coefficient: In the formula, The adjustment amount of the roller is mentioned. The actual thickness value, The average of the thickness control threshold values. The influence coefficient of the shifting rollers.

2. The method as described in claim 1, characterized in that, The step of obtaining the actual thickness values ​​of the target strip at multiple plate width positions within the thickness monitoring range includes: Multiple plate width positions are determined within the thickness monitoring range, and the distance between two adjacent plate width positions is the same; Obtain the actual thickness values ​​of the target strip at the multiple plate width positions.

3. The method as described in claim 1, characterized in that, Also includes: The thickness warping amount is calculated based on the actual thickness values ​​at the multiple plate width positions, and it is determined whether the target strip has experienced thickness warping based on the multiple plate width positions and the corresponding actual thickness values. If so, the amount of anti-warping work roll skew is determined based on the thickness anti-warping amount and the roll skew influence coefficient, and the mill is controlled based on the amount of anti-warping work roll skew.

4. The method as described in claim 3, characterized in that, The calculation of thickness warping based on the actual thickness values ​​at the multiple plate width positions includes: The thickness warping amount is calculated using the largest and smallest actual thickness values ​​among the plurality of plate width positions.

5. The method as described in claim 3, characterized in that, The step of determining whether the target strip has experienced thickness warping based on the multiple plate width positions and corresponding actual thickness values ​​includes: Determine a first distance between the plate width position corresponding to the maximum actual thickness value and the edge of the target strip, and determine a second distance between the plate width position corresponding to the minimum actual thickness value and the edge of the target strip; By comparing the magnitudes of the first distance and the second distance, it is determined whether the target strip has experienced thickness warping.

6. The method as described in claim 5, characterized in that, Before determining the amount of warping work roll skew based on the thickness warping amount and the skew influence coefficient, the method further includes: Determine whether the thickness warping amount is greater than a preset upper limit value for warping amount, and determine whether the absolute value of the difference between the first distance and the second distance is less than or equal to a preset thickness warping position control distance; If all the judgment results are yes, then the step of determining the amount of anti-warping work roll skew based on the thickness anti-warping amount and the skewed roll influence coefficient is executed.

7. A strip thickness control device, characterized in that, Applied to a rolling mill, the device includes: A strip thickness monitoring unit is used to determine the thickness monitoring range of the target strip in a direction perpendicular to the direction of movement of the target strip; wherein one end of the thickness monitoring range is located at the edge of the target strip, and the width of the thickness monitoring range is less than half the width of the target strip; The strip thickness monitoring unit is also used to obtain the actual thickness value of the target strip at multiple plate width positions within the thickness monitoring interval; wherein the distance between each plate width position and the edge of the target strip is different; A rolling control unit is configured to, upon detecting that any of the actual thickness values ​​is not within the thickness control threshold range, control the roll shifting adjustment amount of the rolling mill work rolls based on the actual thickness value, the thickness control threshold range, and a preset roll shifting influence coefficient. The control of the roll shifting adjustment amount based on the actual thickness value, the thickness control threshold range, and the preset roll shifting influence coefficient includes: calculating the difference between the actual thickness value and the average thickness control threshold value, where the average thickness control threshold value is half the sum of the upper limit and lower limit of the thickness control threshold range; and controlling the roll shifting adjustment amount of the rolling mill work rolls based on the ratio of the difference to the roll shifting influence coefficient using the following formula: In the formula, The adjustment amount of the roller is mentioned. The actual thickness value, The average of the thickness control threshold values. The influence coefficient of the shifting rollers.

8. A strip thickness control device, comprising a memory, a processor, and code stored in the memory and executable on the processor, characterized in that, When the processor executes the code, it implements the method described in any one of claims 1-6.

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