Method, apparatus and storage medium for determining a decay trend of roll roughness

Abstract

The application discloses a method, device and storage medium for determining the attenuation trend of the roughness of a rolling mill roller, wherein the method comprises: obtaining the roller speed and the strip speed when each steel coil is rolled in the service cycle of the roller under the condition that the rolling process parameters of a cold rolling continuous rolling mill are constant; determining the forward slip value of each steel coil according to the roller speed and the strip speed; determining the change trend of the forward slip value in the stable rolling stage in the service cycle of the roller according to the forward slip value of each steel coil; and determining the change trend of the forward slip value as the attenuation trend of the roughness of the roller. The technical scheme provided by the application can accurately obtain the attenuation trend of the roughness of the roller without affecting normal rolling.

Description

Technical Field

[0001] This application belongs to the technical field of cold rolling mills, and particularly relates to a method, equipment and storage medium for determining the attenuation trend of roll roughness. Background Technology

[0002] In cold continuous rolling, the surface roughness of the rolls decreases with increasing rolling mileage. Roll roughness significantly impacts the accuracy of friction coefficient calculations, which in turn affects the accuracy of rolling force and forward slip calculations. Traditional methods for calculating the roll roughness decay trend typically involve directly measuring the roll roughness after a shutdown and then determining the decay trend. While this method offers high accuracy, it requires frequent shutdowns and is unsuitable for continuous cold continuous rolling mills. Therefore, determining the surface roughness decay trend of rolls in cold continuous rolling mills is a crucial problem that needs to be solved. Summary of the Invention

[0003] The embodiments of this application provide a method, apparatus and storage medium for determining the attenuation trend of roll roughness, thereby enabling the determination of the attenuation trend of roll roughness in a cold rolling mill to at least partially achieve the desired result without shutting down the mill.

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

[0005] According to a first aspect of the embodiments of this application, a method for determining the attenuation trend of roll roughness is provided, comprising:

[0006] Under the condition that the rolling process parameters of the cold rolling mill are constant, the roll speed and strip speed when rolling each steel coil during the service life of the roll are obtained.

[0007] The forward slip value of each steel coil is determined based on the roll speed and the strip speed.

[0008] Based on the forward slip value of each steel coil, determine the trend of the forward slip value during the stable rolling stage within the service life of the roll;

[0009] The changing trend of the forward slip value is determined as the attenuation trend of the roll roughness.

[0010] In some embodiments, the service life of the roll is the sum of the rolling cycles corresponding to each steel coil, and determining the trend of the forward slip value during the stable rolling phase within the service life of the roll based on the forward slip value of each steel coil includes:

[0011] Based on the forward slip value of each steel coil, determine the average forward slip value of the steel coil during the stable rolling stage within the corresponding rolling cycle;

[0012] The trend of the forward slip value is determined based on the average forward slip value of each steel coil during the stable rolling stage within the corresponding rolling cycle.

[0013] In some embodiments, determining the average forward slip value of each steel coil during the stable rolling phase within a corresponding rolling cycle includes:

[0014] Select the forward slip value corresponding to the highest continuous roll speed from the forward slip values ​​of each steel coil;

[0015] The average value of the selected forward slip is determined as the average forward slip value of the steel coil during the stable rolling stage within the corresponding rolling cycle.

[0016] In some embodiments, determining the trend of the forward slip value based on the average forward slip value of each steel coil during the stable rolling stage within the corresponding rolling cycle includes:

[0017] Based on the rolling length of each steel coil, the rolling mileage of the cold rolling mill in the corresponding stable rolling stage of each steel coil is determined;

[0018] The trend of the forward slip value is obtained by fitting the average forward slip value of each steel coil in the stable rolling stage within the corresponding rolling cycle with the rolling mileage of the cold rolling mill in the corresponding stable rolling stage of each steel coil.

[0019] In some embodiments, determining the rolling mileage of the cold rolling mill in the stable rolling stage corresponding to each steel coil based on the rolling length of each steel coil includes:

[0020] The sum of the rolling lengths from the first coil to the current coil is determined as the rolling mileage of the cold rolling mill in the stable rolling stage corresponding to the current coil.

[0021] In some embodiments, the rolling process parameters include: pass reduction rate, maximum roll speed, front tension, back tension, stand exit thickness, emulsion information, and steel grade and specifications of the coil.

[0022] In some embodiments, determining the forward slip value of each steel coil based on the roll speed and the strip speed includes:

[0023] Determine the speed difference between the strip speed and the roll speed;

[0024] The quotient between the speed difference and the roll speed is determined as the forward slip value.

[0025] According to a second aspect of the present application, an apparatus for determining the attenuation trend of roll roughness is provided, comprising a processor and a memory, the memory storing computer program instructions executable by the processor, wherein when the processor executes the computer program instructions, it implements the steps of the method described in any of the first aspects above.

[0026] According to a third aspect of the embodiments of this application, a computer-readable storage medium is provided, wherein computer program instructions are stored therein, and when executed by a processor, the computer program instructions cause the processor to perform the steps of the method as described in any of the first aspects above.

[0027] According to a fourth aspect of the embodiments of this application, a computer program product is provided, including a computer program that, when executed by a processor, causes the processor to perform the steps of the method as described in any of the first aspects above.

[0028] In this application, by keeping the rolling process parameters of a cold rolling mill constant, the roll speed and strip speed during the rolling of each steel coil within the roll's service life are obtained; based on the roll speed and strip speed, the forward slip value of each steel coil is determined; based on the forward slip value of each steel coil, the changing trend of the forward slip value during the stable rolling phase within the roll's service life is determined; and the changing trend of the forward slip value is determined as the attenuation trend of the roll roughness. Specifically, by determining the changing trend of the forward slip value during the stable rolling phase within the roll's service life as the attenuation trend of the roll roughness under the premise of constant rolling process parameters, the attenuation trend of the roll roughness is accurately obtained without affecting normal rolling.

[0029] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0030] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort. In the drawings:

[0031] Figure 1 A flowchart illustrating a method for determining the attenuation trend of roll roughness in one embodiment is shown.

[0032] Figure 2 It shows Figure 1 A schematic diagram of the rolling speed of each steel coil;

[0033] Figure 3 It shows Figure 2 A schematic diagram showing the forward slip value corresponding to the roll speed of each steel coil in the process;

[0034] Figure 4 It shows Figure 2 A schematic diagram of the roll speeds during the stable rolling stage of each steel coil within the corresponding rolling cycle;

[0035] Figure 5 It shows Figure 3 A schematic diagram showing the trend of the forward slip value of each steel coil during the stable rolling stage within the corresponding rolling cycle as a function of rolling time;

[0036] Figure 6 A block diagram of an apparatus for determining the attenuation trend of roll roughness in one embodiment is shown;

[0037] Figure 7 A schematic diagram of a device for determining the attenuation trend of roll roughness in one embodiment is shown. Detailed Implementation

[0038] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0039] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a thorough understanding of embodiments of this application. However, those skilled in the art will recognize that the technical solutions of this application can be practiced without one or more of the specific details, or other methods, components, apparatuses, steps, etc., can be employed. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of this application.

[0040] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities can be implemented in software, in one or more hardware modules or integrated circuits, or in different network and / or processor devices and / or microcontroller devices.

[0041] The flowcharts shown in the accompanying drawings are merely illustrative and do not necessarily include all content and operations / steps, nor do they necessarily have to be performed in the described order. For example, some operations / steps can be broken down, while others can be combined or partially combined; therefore, the actual execution order may change depending on the specific circumstances.

[0042] To enable those skilled in the art to better understand this application, the application scenarios involved in this application will be briefly described first.

[0043] Traditional methods for calculating the attenuation trend of roll roughness typically involve directly measuring the roll roughness after a shutdown and then determining the attenuation trend. While this method offers high accuracy, it requires frequent shutdowns and is unsuitable for continuous cold rolling mills. Another method involves measuring the surface roughness of the rolled strip and inferring the roll roughness based on the roughness transfer pattern between the roll and strip surfaces. However, the accuracy of this method is affected by the accuracy of the strip surface roughness measurement and the transfer pattern, leading to inaccuracies in the determined roll roughness attenuation trend. The method for determining the attenuation trend of roll roughness provided in this application considers that rolling process parameters affect the friction coefficient by influencing the thickness of the lubricating oil film. When the rolling process parameters are constant and lubrication is stable, the factor affecting the friction coefficient during rolling is the attenuation of roll roughness. The factors affecting the friction coefficient can be derived backward using the following Hill formula:

[0044]

[0045] Where μ is the coefficient of friction, P is the actual rolling force, b is the strip width, and k p Let H be the strip yield strength related to the steel grade, H be the inlet strip thickness, h be the outlet strip thickness, r be the pass reduction rate, tf be the pre-tension, tb be the post-tension, and R′ be the roll flattening radius. According to the formula, under stable rolling process conditions, the change in friction coefficient is caused by the decrease in roll roughness.

[0046] According to Stone's formula:

[0047]

[0048] Where Δh is the thickness difference at the stand exit, R is the roll radius, and f is the forward slip value, a correspondence between the friction coefficient and forward slip can be established. This allows us to deduce that, under stable rolling conditions, the factor affecting the change in forward slip value is the change in roll roughness. Therefore, the trend of forward slip value change during the stable rolling phase within the roll's service life can be taken as the attenuation trend of roll roughness. This not only allows us to determine the attenuation trend of roll roughness without stopping the machine, but also ensures that the accuracy of this attenuation trend is unaffected by the accuracy of strip surface roughness measurement and transfer patterns.

[0049] Figure 1 A flowchart illustrating a method for determining the attenuation trend of roll roughness in one embodiment is shown. Figure 1 As shown, a method for determining the attenuation trend of roll roughness is provided, which may include the following steps 101 to 104.

[0050] In step 101, with the rolling process parameters of the cold rolling mill constant, the roll speed and strip speed are obtained when rolling each steel coil during the roll's service life.

[0051] Rolling process parameters are related to the coefficient of friction by affecting the thickness of the lubricating oil film. These parameters may include: pass reduction rate, maximum roll speed, front tension, back tension, stand exit thickness, emulsion information, and the steel grade and specifications of the coil. Emulsion information may include details such as the cleanliness, stability, chemical properties, concentration, and temperature of the emulsion.

[0052] It should be noted that, according to the production planning rules of cold rolling mills, the steel coils rolled within a single roll service cycle typically have the same steel grade and specifications to ensure the stability of the rolled steel coil's deformation resistance. Therefore, in the embodiments of this application, the steel grades and specifications of the steel coils rolled within the roll service cycle are the same.

[0053] It is understandable that the service life of the rolls is the sum of the rolling cycles corresponding to each steel coil. Within the corresponding rolling cycle of each steel coil, both the roll speed and the strip speed change. In the implementation process, it is necessary to obtain multiple roll speeds and multiple strip speeds corresponding to each steel coil. The roll speed can be acquired through a high-precision roll encoder, and the strip speed can be acquired through a speed measuring instrument.

[0054] In step 102, the forward slip value of each steel coil is determined based on the roll speed and strip speed.

[0055] In some embodiments, the speed difference between the strip speed and the roll speed can be determined; the quotient between the speed difference and the roll speed is determined as the forward slip value.

[0056] In other words, the forward slip value can be calculated using the following formula:

[0057]

[0058] Where f is the forward sliding value, v h v is the speed of the strip. h This refers to the speed of the rolling mill rolls.

[0059] Figure 2 It shows Figure 1 A schematic diagram of the roll speeds for various steel coils. Figure 3 It shows Figure 2 A schematic diagram showing the forward slip values ​​corresponding to the roll speeds of various steel coils. (See also...) Figure 2 and Figure 3 Each steel coil has a rolling cycle of 15 minutes. The roll speed of each steel coil changes continuously within the corresponding rolling cycle. It usually rises to the highest roll speed and is maintained for a period of time before decreasing. Therefore, the calculated forward slip value also changes continuously.

[0060] In step 103, the trend of the forward slip value during the stable rolling stage within the service life of the roll is determined based on the forward slip value of each steel coil.

[0061] It is understandable that each steel coil has a stable rolling stage within its corresponding rolling cycle, during which the roll speed reaches its maximum and lasts for a relatively long period. Figure 4 It shows Figure 2 A schematic diagram showing the roll speeds of various steel coils during the stable rolling stage within their respective rolling cycles. (See diagram below.) Figure 4 As shown, the roll speed of each steel coil is the maximum roll speed in the stable rolling stage, but the rolling time of different steel coils in the stable rolling stage varies.

[0062] In some embodiments, the average forward slip value of each steel coil during the stable rolling stage in the corresponding rolling cycle can be determined based on the forward slip value of each steel coil; and the trend of the forward slip value can be determined based on the average forward slip value of each steel coil during the stable rolling stage in the corresponding rolling cycle.

[0063] In the implementation process, the forward slip value corresponding to the highest continuous roll speed can be selected from the forward slip values ​​of each steel coil; the average value of the selected forward slip values ​​is determined as the average forward slip value of the steel coil in the stable rolling stage within the corresponding rolling cycle.

[0064] It should be noted that after determining the average forward slip value of the steel coil during the stable rolling stage within the corresponding rolling cycle, various methods can be used to obtain the trend of the forward slip value.

[0065] In some embodiments, the average forward slip value and rolling time of each steel coil during the stable rolling stage within the corresponding rolling cycle can be fitted to obtain the trend of the forward slip value.

[0066] Figure 5 It shows Figure 3 A schematic diagram illustrating the variation trend of the forward slip value of each steel coil during the stable rolling stage within the corresponding rolling cycle, as a function of rolling time. (See diagram below.) Figure 5 As shown, the forward slip value of each steel coil in the stable rolling stage within the corresponding rolling cycle decreases with the increase of rolling time.

[0067] In other embodiments, the rolling mileage of the cold rolling mill in the stable rolling stage corresponding to each steel coil can be determined based on the rolling length of each steel coil; the forward slip average value of each steel coil in the stable rolling stage within the corresponding rolling cycle and the rolling mileage of the cold rolling mill in the stable rolling stage corresponding to each steel coil are fitted to obtain the trend of the forward slip value.

[0068] In the implementation process, the sum of the rolling lengths from the first steel coil to the current steel coil can be determined as the rolling mileage of the cold rolling mill in the stable rolling stage corresponding to the current steel coil.

[0069] Taking the rolling length of the first steel coil as 9.44 km, the second steel coil as 9.37 km, and the third steel coil as 9.31 km as examples, the rolling mileage of the cold rolling mill in the stable rolling stage corresponding to the first steel coil is 9.44 km, the rolling mileage of the stable rolling stage corresponding to the second steel coil is 18.81 km, and the rolling mileage of the stable rolling stage corresponding to the third steel coil is 28.12 km.

[0070] The average forward slip value of each steel coil during the stable rolling stage within the corresponding rolling cycle and the rolling mileage of the cold rolling mill during this stable rolling stage can be referenced in Table 1 below:

[0071] Table 1

[0072] Rolling distance (km) 9.44 18.81 28.12 37.45 46.81 56.14 65.37 74.77 Average forward slip (%) 1.06 1.01 0.99 0.96 0.93 0.93 0.93 0.91 Rolling distance (km) 84.13 93.48 102.63 111.72 121.03 130.15 139.52 148.94 Average forward slip (%) 0.89 0.88 0.88 0.84 0.85 0.81 0.79 0.81 Rolling distance (km) 157.84 167.23 176.66 186.09 195.38 204.58 Average forward slip (%) 0.76 0.75 0.74 0.74 0.75 0.75

[0073] After obtaining the average forward slip value and rolling mileage of each steel coil during the stable rolling stage in the corresponding rolling cycle, the trend curve of the forward slip value can be obtained by fitting the average forward slip value and the rolling mileage. This curve reflects the trend of the forward slip value with the rolling mileage.

[0074] It should be noted that the trend curve of the forward slip value obtained by fitting the average forward slip value and the rolling mileage fully considers the influence of the forward slip value at a low roll speed on the forward slip value in the stable rolling stage, and therefore can more accurately reflect the trend of the forward slip value.

[0075] In step 104, the trend of the forward slip value is determined as the attenuation trend of the roll roughness.

[0076] It should be noted that, under constant rolling process parameters and stable rolling conditions, the factor affecting the change in forward slip value is the change in roll roughness. Therefore, the trend of forward slip value change during the stable rolling phase within the roll's service life can be taken as the decay trend of roll roughness.

[0077] In the above method for determining the attenuation trend of roll roughness, under the condition that the rolling process parameters of the cold rolling mill are constant, the roll speed and strip speed during the rolling of each steel coil within the roll's service life are obtained; based on the roll speed and strip speed, the forward slip value of each steel coil is determined; based on the forward slip value of each steel coil, the changing trend of the forward slip value in the stable rolling stage within the roll's service life is determined; and the changing trend of the forward slip value is determined as the attenuation trend of roll roughness. In this way, by determining the changing trend of the forward slip value in the stable rolling stage within the roll's service life as the attenuation trend of roll roughness under the premise of constant rolling process parameters, the attenuation trend of roll roughness is accurately obtained without affecting normal rolling.

[0078] The following describes an apparatus embodiment of this application, which can be used to execute the method for determining the attenuation trend of roll roughness in the above embodiments of this application. For details not disclosed in the apparatus embodiments of this application, please refer to the embodiments of the method for determining the attenuation trend of roll roughness described above in this application.

[0079] Figure 6 A block diagram of an apparatus for determining the attenuation trend of roll roughness in one embodiment is shown. Figure 6 As shown in the embodiment of this application, the apparatus for determining the attenuation trend of roll roughness may include: a speed acquisition module 601, a forward slip value calculation module 602, a change trend determination module 603, and an attenuation trend determination module 604. The speed acquisition module 601 is used to acquire the roll speed and strip speed during the rolling of each steel coil within the roll's service life, provided that the rolling process parameters of the cold rolling mill are constant. The forward slip value calculation module 602 is used to determine the forward slip value of each steel coil based on the roll speed and the strip speed. The change trend determination module 603 is used to determine the change trend of the forward slip value during the stable rolling stage within the roll's service life based on the forward slip value of each steel coil. The attenuation trend determination module 604 is used to determine the change trend of the forward slip value as the attenuation trend of the roll roughness.

[0080] In some embodiments, the service life of the roll is the sum of the rolling cycles corresponding to each steel coil. The trend determination module 603 is further configured to determine the average forward slip value of the steel coil during the stable rolling stage in the corresponding rolling cycle based on the forward slip value of each steel coil; and to determine the trend of the forward slip value based on the average forward slip value of the steel coil during the stable rolling stage in the corresponding rolling cycle.

[0081] In some embodiments, the trend determination module 603 can also be used to select the forward slip value corresponding to the highest continuous roll speed from the forward slip value of each steel coil; and determine the average value of the selected forward slip value as the average forward slip value of the steel coil in the stable rolling stage within the corresponding rolling cycle.

[0082] In some embodiments, the trend determination module 603 can also be used to determine the rolling mileage of the cold rolling mill in the stable rolling stage corresponding to each steel coil based on the rolling length of each steel coil; and to fit the forward slip average value of each steel coil in the stable rolling stage within the corresponding rolling cycle with the rolling mileage of the cold rolling mill in the stable rolling stage corresponding to each steel coil to obtain the trend of the forward slip value.

[0083] In some embodiments, the trend determination module 603 can also be used to determine the sum of the rolling lengths from the first coil to the current coil as the rolling mileage of the cold rolling mill in the stable rolling stage corresponding to the current coil.

[0084] In some embodiments, the rolling process parameters may include: pass reduction rate, maximum roll speed, front tension, back tension, stand exit thickness, emulsion information, and steel grade and specifications of the coil.

[0085] In some embodiments, the forward slip value calculation module 602 can also be used to determine the speed difference between the strip speed and the roll speed; and the quotient between the speed difference and the roll speed is determined as the forward slip value.

[0086] Based on the same inventive concept, embodiments of this application also provide a device for determining the attenuation trend of roll roughness, referencing... Figure 7 The diagram shows a schematic of the structure of a device for determining the attenuation trend of roll roughness in an embodiment of this application. The device for determining the attenuation trend of roll roughness includes one or more memories 704, one or more processors 702, and at least one computer program (computer program instruction) stored in the memory 704 and executable on the processor 702. When the processor 702 executes the computer program, it implements the method described above.

[0087] Among them, Figure 7In this document, a bus architecture (represented by bus 700) is used. Bus 700 may include any number of interconnected buses and bridges, linking various circuits including one or more processors represented by processor 702 and memory represented by memory 704. Bus 700 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 705 provides an interface between bus 700 and receiver 701 and transmitter 703. Receiver 701 and transmitter 703 may be the same element, i.e., a transceiver, providing a unit for communicating with various other devices over a transmission medium. Processor 702 is responsible for managing bus 700 and general processing, while memory 704 can be used to store data used by processor 702 during operation.

[0088] Based on the same inventive concept, embodiments of this application provide a computer-readable storage medium storing computer program instructions, which, when executed by a processor, cause the processor to perform the steps of the method described above.

[0089] Based on the same inventive concept, embodiments of this application provide a computer program product, including a computer program, which, when executed by a processor, causes the processor to perform the steps of the method described above.

[0090] The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored as one or more instructions or codes on or transmitted via a computer-readable medium. Other examples and embodiments are within the scope and spirit of this application and the appended claims. For example, due to the nature of software, the functions described above may be implemented using software executed by a processor, hardware, firmware, hardwired, or any combination thereof. Furthermore, the functional units may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit.

[0091] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For instance, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling, direct coupling, or communication connection may be through some interfaces; the indirect coupling or communication connection between units or modules may be electrical or other forms.

[0092] The units described as separate components may or may not be physically separate. Similarly, the components of the control device may or may not be physical units; they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment, depending on actual needs.

[0093] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the 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 to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing computer program instructions, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0094] The above description is merely an embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A method for determining the attenuation trend of roll roughness, characterized in that, include: Under the condition that the rolling process parameters of the cold rolling mill are constant, the roll speed and strip speed when rolling each steel coil during the service life of the roll are obtained. The forward slip value of each steel coil is determined based on the roll speed and the strip speed. Based on the forward slip value of each steel coil, determine the trend of the forward slip value during the stable rolling stage within the service life of the roll; The trend of the forward slip value is determined as the attenuation trend of the roll roughness; Wherein, the service life of the roll is the sum of the rolling cycles corresponding to each steel coil, and determining the trend of the change of the forward slip value in the stable rolling stage within the service life of the roll based on the forward slip value of each steel coil includes: Based on the forward slip value of each steel coil, determine the average forward slip value of the steel coil during the stable rolling stage within the corresponding rolling cycle; The trend of the forward slip value is determined based on the average forward slip value of each steel coil during the stable rolling stage within the corresponding rolling cycle. The step of determining the trend of the forward slip value based on the average forward slip value of each steel coil during the stable rolling stage within the corresponding rolling cycle includes: Based on the rolling length of each steel coil, the rolling mileage of the cold rolling mill in the corresponding stable rolling stage of each steel coil is determined; The trend of the forward slip value is obtained by fitting the average forward slip value of each steel coil in the stable rolling stage within the corresponding rolling cycle with the rolling mileage of the cold rolling mill in the corresponding stable rolling stage of each steel coil.

2. The method for determining the attenuation trend of roll roughness according to claim 1, characterized in that, The step of determining the average forward slip value of each steel coil during the stable rolling stage within the corresponding rolling cycle includes: Select the forward slip value corresponding to the highest continuous roll speed from the forward slip values ​​of each steel coil; The average value of the selected forward slip is determined as the average forward slip value of the steel coil during the stable rolling stage within the corresponding rolling cycle.

3. The method for determining the attenuation trend of roll roughness according to claim 1, characterized in that, The step of determining the rolling mileage of the cold rolling mill in the stable rolling stage corresponding to each steel coil based on the rolling length of each steel coil includes: The sum of the rolling lengths from the first coil to the current coil is determined as the rolling mileage of the cold rolling mill in the stable rolling stage corresponding to the current coil.

4. The method for determining the attenuation trend of roll roughness according to claim 1, characterized in that, The rolling process parameters include: pass reduction rate, maximum roll speed, front tension, back tension, stand exit thickness, emulsion information, and steel grade and specifications of the coil.

5. The method for determining the attenuation trend of roll roughness according to claim 1, characterized in that, The step of determining the forward slip value of each steel coil based on the roll speed and the strip speed includes: Determine the speed difference between the strip speed and the roll speed; The quotient between the speed difference and the roll speed is determined as the forward slip value.

6. An apparatus for determining the attenuation trend of roll roughness, comprising a processor and a memory, characterized in that, The memory stores computer program instructions that can be executed by the processor, and when the processor executes the computer program instructions, it implements the steps of the method as described in any one of claims 1 to 5.

7. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer program instructions that, when executed by a processor, cause the processor to perform the steps of the method as described in any one of claims 1 to 5.

8. A computer program product, comprising a computer program, characterized in that, When the computer program product is executed by a processor, it causes the processor to perform the steps of the method as described in any one of claims 1 to 5.

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