Method and equipment for determining attenuation trend of roller roughness and storage medium

Abstract

The invention discloses a method and device for determining the attenuation trend of roller roughness and a storage medium, and the method comprises the steps that under the condition that rolling technological parameters of a cold rolling continuous mill are constant, the roller speed and the strip steel speed during rolling of all steel coils in the roller service cycle are obtained; according to the roller speed and the strip steel speed, the forward slip value of each steel coil is determined; according to the forward slip value of each steel coil, the change trend of the forward slip value in the stable rolling stage in the roller service cycle is determined; and determining the change trend of the forward slip value as the attenuation trend of the roughness of the roller. According to the technical scheme, the attenuation trend of the roller roughness can be accurately obtained on the premise that normal rolling is not affected.

Description

Technical Field

[0001] The present application belongs to the technical field of cold rolling mills, and in particular, relates to a method, a device and a storage medium for determining a decay trend of roll roughness. Background Art

[0002] During the cold rolling process, the roughness of the roll will decay with the increase of rolling mileage, and the roughness of the roll has an important influence on the calculation accuracy of the friction coefficient, which in turn affects the calculation accuracy of the rolling force and the forward slip value through the friction coefficient. The traditional method for measuring the attenuation trend of the roll roughness is usually to directly measure the roll roughness after shutdown, and then determine the attenuation trend of the roll roughness. Although this method has high accuracy, it cannot be applied to continuous production cold rolling units because it requires frequent shutdowns. Therefore, how to determine the attenuation trend of the roughness of the rolls of the cold rolling mill is an urgent problem to be solved. Summary of the invention

[0003] The embodiments of the present application provide a method, device and storage medium for determining the attenuation trend of the roughness of a rolling mill roll, thereby at least to a certain extent being able to determine the attenuation trend of the roughness of the rolling mill rolls of a cold rolling mill without stopping the mill.

[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 a first aspect of an embodiment of the present application, a method for determining a decay 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 the strip speed when each steel coil is rolled during the roll service cycle are obtained;

[0007] Determining the forward slip value of each steel coil according to the roll speed and the strip speed;

[0008] Determining, according to the forward slip values ​​of the steel coils, a change trend of the forward slip value in a stable rolling stage within the service life of the roll;

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

[0010] In some embodiments, the roll service cycle is the sum of the rolling cycles corresponding to the steel coils, and determining the change trend of the forward slip value in the stable rolling stage within the roll service cycle according to the forward slip value of each steel coil includes:

[0011] According to the forward slip value of each steel coil, determining the average forward slip value of the steel coil in the stable rolling stage within the corresponding rolling cycle;

[0012] According to the average forward slip value of each steel coil in the stable rolling stage within the corresponding rolling cycle, the variation trend of the forward slip value is determined.

[0013] In some embodiments, determining the average forward slip value of each steel coil in the stable rolling stage within the corresponding rolling cycle according to the forward slip value of each steel coil comprises:

[0014] Filter out the forward slip value corresponding to the time when the roller speed is continuously at the highest from the forward slip value of each steel coil;

[0015] The average value of the screened 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.

[0016] In some embodiments, determining the change trend of the forward slip value according to the forward slip average value of each steel coil in the stable rolling stage in the corresponding rolling cycle includes:

[0017] Determining the rolling mileage of the cold rolling mill in the stable rolling stage corresponding to each steel coil according to the rolling length of each steel coil;

[0018] The average forward slip 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 variation trend of the forward slip value.

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

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

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

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

[0023] determining a 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 an embodiment of the present application, a device for determining the attenuation trend of roller roughness is provided, comprising a processor and a memory, wherein the memory stores computer program instructions that can be executed by the processor, and when the processor executes the computer program instructions, the steps of the method described in any one of the first aspects above are implemented.

[0026] According to a third aspect of an embodiment of the present application, a computer-readable storage medium is provided, in which computer program instructions are stored. When the computer program instructions are executed by a processor, the processor is prompted to implement the steps of the method described in any one of the first aspects above.

[0027] According to a fourth aspect of an embodiment of the present application, a computer program product is provided, including a computer program. When the computer program product is executed by a processor, it prompts the processor to implement the steps of the method described in any one of the first aspects above.

[0028] In the present application, the roll speed and strip speed of each steel coil when rolling in the service cycle of the roll are obtained under the condition that the rolling process parameters of the cold rolling mill are constant; the forward slip value of each steel coil is determined according to the roll speed and the strip speed; the change trend of the forward slip value in the stable rolling stage in the service cycle of the roll is determined according to the forward slip value of each steel coil; the change trend of the forward slip value is determined as the attenuation trend of the roll roughness. Among them, by determining the change trend of the forward slip value in the stable rolling stage in the service cycle of the roll 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 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

[0030] 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:

[0031] Figure 1 A schematic flow chart of a method for determining a decay trend of roll roughness in one embodiment is shown;

[0032] Figure 2 Shows Figure 1 A schematic diagram of the roll speed of each steel coil;

[0033] Figure 3 Shows Figure 2 A schematic diagram of the forward slip value corresponding to the roll speed of each steel coil;

[0034] Figure 4 Shows Figure 2 Schematic diagram of the roll speed of each steel coil in the stable rolling stage in the corresponding rolling cycle;

[0035] Figure 5 Shows Figure 3 Schematic diagram of the variation trend of the forward slip value of each steel coil with the rolling time in the stable rolling stage within the corresponding rolling cycle;

[0036] Figure 6 A block diagram of a device for determining a decay trend of roll roughness in one embodiment is shown;

[0037] Figure 7 A schematic structural diagram of an apparatus for determining a decay trend of roll roughness in one embodiment is shown. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0039] 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.

[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 may be implemented in software form, or in one or more hardware modules or integrated circuits, or in different networks and / or processor devices and / or microcontroller devices.

[0041] The flowcharts shown in the accompanying drawings are only exemplary and do not necessarily include all the contents and operations / steps, nor must they be executed in the order described. For example, some operations / steps can be decomposed, and some operations / steps can be combined or partially combined, so the actual execution order may change according to actual conditions.

[0042] In order to enable those skilled in the art to better understand the present application, the application scenarios involved in the present application are first briefly described.

[0043] The traditional method for measuring the attenuation trend of roll roughness usually directly measures the roll roughness after shutdown, and then determines the attenuation trend of the roll roughness. Although this method has high accuracy, it cannot be applied to cold rolling mills with continuous production because it requires frequent shutdowns. Another measurement method is to measure the roughness of the surface of the rolled strip and infer the roll roughness through the transfer law of the roughness of the roll and the strip surface. The accuracy of the roll roughness obtained by this method is affected by the accuracy of the strip surface roughness measurement and transfer law, which leads to the problem of low accuracy of the determined roll roughness attenuation trend. The method for determining the attenuation trend of roll roughness provided in the present application takes into account that the rolling process parameters change the friction coefficient by affecting the thickness of the lubricating oil film. When the rolling process parameters are constant and the lubrication is in a stable state, the factor affecting the friction coefficient during the rolling process is the attenuation of the roll roughness. The factors affecting the friction coefficient can be reversed through the following Hill formula:

[0044]

[0045] Where μ is the friction coefficient, P is the actual rolling force, b is the strip width, k p is the yield strength of the strip steel related to the steel type, H is the thickness of the inlet strip steel, h is the thickness of the outlet strip steel, r is the pass reduction rate, tf is the front tension, tb is the back tension, and R' is the roll flattening radius. According to the formula, when the rolling process is stable, the reason for the change in the friction coefficient is the attenuation of the roll roughness.

[0046] According to Stone's formula:

[0047]

[0048] Among them, Δh is the thickness difference at the stand exit, R is the roller radius, and f is the forward slip value. The corresponding relationship between the friction coefficient and the forward slip can be established, and then it can be deduced that the factor affecting the change of the forward slip value under the stable state of the rolling process is the change of the roller roughness. Therefore, the change trend of the forward slip value in the stable rolling stage within the service life of the roller can be used as the attenuation trend of the roller roughness. In this way, not only can the attenuation trend of the roller roughness be determined without stopping the machine, but the accuracy of the attenuation trend is not affected by the accuracy of the strip surface roughness measurement and transfer law.

[0049] Figure 1 FIG. 2 is a flow chart of a method for determining a roll roughness decay trend in one embodiment. Figure 1 As shown, a method for determining a decay trend of roll roughness is provided, and the method may include the following steps 101 to 104 .

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

[0051] The rolling process parameters are related process parameters that change the friction coefficient by affecting the thickness of the lubricating oil film, and may include: pass reduction rate, maximum roll speed, front tension, back tension, stand outlet thickness, emulsion information, steel type and specification of the steel coil. Among them, the emulsion information may include the cleanliness, stability, chemical properties, concentration, temperature and other information of the emulsion.

[0052] It should be noted that, according to the production plan of the cold rolling mill, the steel coils rolled in one roll service cycle usually have the same steel type and specification to ensure the stability of the deformation resistance of the rolled steel coils. Therefore, in the embodiment of the present application, the steel type and specification of each steel coil rolled in the roll service cycle are the same.

[0053] It can be understood that the service life of the roll is the sum of the rolling cycles corresponding to each steel coil. During the corresponding rolling cycle of each steel coil, the roll speed and the strip speed are both changing. During 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 collected by a high-precision roll encoder, and the strip speed can be collected by a speed meter.

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

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

[0056] That is to say, the forward slip value can be calculated by the following formula:

[0057]

[0058] Among them, f is the forward slip value, v h is the strip speed, v h is the roller speed.

[0059] Figure 2 Shows Figure 1 A schematic diagram of the roll speed of each steel coil, Figure 3 Shows Figure 2 A schematic diagram of the forward slip value corresponding to the roll speed of each steel coil. Figure 2 and Figure 3 The rolling cycle corresponding to each steel coil is 15 minutes. The roll speed of each steel coil in the corresponding rolling cycle is constantly changing, usually rising to the maximum roll speed and maintaining it for a period of time before decreasing. Therefore, the calculated forward slip value is also constantly changing.

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

[0061] It can be understood that each steel coil has a stable rolling stage in the corresponding rolling cycle. In this stable rolling stage, the roll speed reaches the maximum roll speed and lasts for a long time. Figure 4 Shows Figure 2 Schematic diagram of the roll speed of each steel coil in the stable rolling stage of the corresponding rolling cycle. Figure 4 As shown, the roll speed of each steel coil in the stable rolling stage is the maximum roll speed, but the rolling time of different steel coils in the stable rolling stage is different.

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

[0063] During the implementation process, the forward slip value corresponding to the time when the roller speed is continuously at the highest can be screened out from the forward slip values ​​of each steel coil; the average value of the screened 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 in the stable rolling stage within the corresponding rolling cycle, a variety of methods can be used to obtain the change trend of the forward slip value.

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

[0066] Figure 5 Shows Figure 3 Schematic diagram of the change trend of the forward slip value of each steel coil in the stable rolling stage with the rolling time in the corresponding rolling cycle. Figure 5 As shown in FIG. 1 , the forward slip value of each steel coil in the stable rolling stage within the corresponding rolling cycle decays 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 according to the rolling length of each steel coil; the average forward slip value of each steel coil in the stable rolling stage in 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 changing trend of the forward slip value.

[0068] During 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 rolling length of the second steel coil as 9.37, and the rolling length of the third steel coil as 9.31 km as an example, it can be calculated that 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 second steel coil in the stable rolling stage is 18.81 km, and the rolling mileage of the third steel coil in the stable rolling stage is 28.12 km.

[0070] The average forward slip value of each steel coil in the stable rolling stage in the corresponding rolling cycle and the rolling mileage of the cold rolling mill in the stable rolling stage can be referred to in the following Table 1:

[0071] Table 1

[0072] Rolling mileage (km) 9.44 18.81 28.12 37.45 46.81 56.14 65.37 74.77 Average forward sliding speed (%) 1.06 1.01 0.99 0.96 0.93 0.93 0.93 0.91 Rolling mileage (km) 84.13 93.48 102.63 111.72 121.03 130.15 139.52 148.94 Average forward sliding speed (%) 0.89 0.88 0.88 0.84 0.85 0.81 0.79 0.81 Rolling mileage (km) 157.84 167.23 176.66 186.09 195.38 204.58 Average forward sliding speed (%) 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 in the stable rolling stage within the corresponding rolling cycle, the change 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 change trend of the forward slip value with the rolling mileage.

[0074] It should be noted that the changing trend curve of the forward slip value obtained by fitting the forward slip average 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 can therefore more accurately reflect the changing trend of the forward slip value.

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

[0076] It should be noted that when the rolling process parameters are constant and the rolling state is stable, the factor affecting the change of the forward slip value is the change of the roll roughness. Therefore, the change trend of the forward slip value in the stable rolling stage within the roll service cycle can be used as the attenuation trend of the roll roughness.

[0077] In the above method for determining the attenuation trend of the roll roughness, under the condition that the rolling process parameters of the cold rolling mill are constant, the roll speed and the strip speed when rolling each steel coil within the roll service cycle are obtained; the forward slip value of each steel coil is determined according to the roll speed and the strip speed; the change trend of the forward slip value in the stable rolling stage within the roll service cycle is determined according to the forward slip value of each steel coil; the change trend of the forward slip value is determined as the attenuation trend of the roll roughness. Among them, by determining the change trend of the forward slip value in the stable rolling stage within the roll service cycle 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.

[0078] The following describes an apparatus embodiment of the present application, which can be used to execute the method for determining the attenuation trend of the roughness of a rolling mill roll in the above-mentioned embodiment of the present application. For details not disclosed in the apparatus embodiment of the present application, please refer to the embodiment of the method for determining the attenuation trend of the roughness of a rolling mill roll in the above-mentioned embodiment of the present application.

[0079] Figure 6 FIG. 2 shows a block diagram of a device for determining a decay trend of roll roughness in one embodiment. Figure 6 As shown, the device for determining the attenuation trend of roll roughness in an embodiment of the present application 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, wherein the speed acquisition module 601 is used to obtain the roll speed and the strip speed when rolling each steel coil within the roll service cycle when 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 according to 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 in the stable rolling stage within the roll service cycle according to 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 roll roughness.

[0080] In some embodiments, the service cycle of the rolling mill roll is the sum of the rolling cycles corresponding to the steel coils, and the change trend determination module 603 is also used to determine the average forward slip value of the steel coil in the stable rolling stage in the corresponding rolling cycle according to the forward slip value of each steel coil; and determine the change trend of the forward slip value according to the average forward slip value of the steel coils in the stable rolling stage in the corresponding rolling cycle.

[0081] In some embodiments, the change trend determination module 603 can also be used to filter out the forward slip value corresponding to the time when the roller speed is continuously at the highest from the forward slip values ​​of each steel coil; and determine the average value of the filtered forward slip values ​​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 change 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 according to the rolling length of each steel coil; fit the average forward slip 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 to obtain the change trend of the forward slip value.

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

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

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

[0086] Based on the same inventive concept, the embodiment of the present application also provides a device for determining the attenuation trend of the roughness of the roll, referring to Figure 7 , showing a schematic diagram of the structure of the device for determining the attenuation trend of roller roughness in an embodiment of the present application, the device for determining the attenuation trend of roller 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, and the processor 702 implements the method described above when executing the computer program.

[0087] Among them, Figure 7In the embodiment of the present invention, a bus architecture (represented by bus 700) is shown, which may include any number of interconnected buses and bridges, and bus 700 links 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 peripherals, voltage regulators, and power management circuits, which are well known in the art and are therefore not further described 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, namely 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 may be used to store data used by processor 702 when performing operations.

[0088] Based on the same inventive concept, an embodiment of the present application provides a computer-readable storage medium, in which computer program instructions are stored. When the computer program instructions are executed by a processor, the processor is prompted to implement the steps of the method as described above.

[0089] Based on the same inventive concept, an embodiment of the present application provides a computer program product, including a computer program. When the computer program product is executed by a processor, it prompts the processor to implement the steps of the method as 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 a computer-readable medium or transmitted via a computer-readable medium. Other examples and implementations are within the scope and spirit of the present 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, hard wiring, or a combination of any of these. In addition, each functional unit may be integrated into a processing unit, each unit may exist physically separately, or two or more units may be integrated into one 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. Among them, the device embodiments described above are only schematic. For example, the division of the units can be a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0092] The units described as separate components may or may not be physically separated, and the components of the control device may or may not be physical units, that is, they may be located in one place or distributed in multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0093] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be essentially or partly or all or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, disk or optical disk, etc., which can store computer program instructions.

[0094] The above description is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present application shall be included in the scope of the claims of the present application.

Claims

1. A method for determining the decay 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 the strip speed when each steel coil is rolled during the roll service cycle are obtained; Determining the forward slip value of each steel coil according to the roll speed and the strip speed; Determining, according to the forward slip values ​​of the steel coils, a change trend of the forward slip value in a stable rolling stage within the service life of the roll; The variation trend of the forward slip value is determined as the attenuation trend of the roll roughness.

2. The method for determining the attenuation trend of roll roughness according to claim 1, characterized in that The roll service cycle is the sum of the rolling cycles corresponding to the steel coils, and determining the change trend of the forward slip value in the stable rolling stage within the roll service cycle according to the forward slip value of each steel coil includes: According to the forward slip value of each steel coil, determining the average forward slip value of the steel coil in the stable rolling stage within the corresponding rolling cycle; According to the average forward slip value of each steel coil in the stable rolling stage within the corresponding rolling cycle, the variation trend of the forward slip value is determined.

3. The method for determining the attenuation trend of roll roughness according to claim 2, characterized in that: Determining the average forward slip value of each steel coil in a stable rolling stage within a corresponding rolling cycle according to the forward slip value of each steel coil comprises: Filter out the forward slip value corresponding to the time when the roller speed is continuously at the highest from the forward slip value of each steel coil; The average value of the screened 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.

4. The method for determining the attenuation trend of roll roughness according to claim 2, characterized in that: Determining the change trend of the forward slip value according to the forward slip average value of each steel coil in the stable rolling stage in the corresponding rolling cycle includes: Determining the rolling mileage of the cold rolling mill in the stable rolling stage corresponding to each steel coil according to the rolling length of each steel coil; The average forward slip 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 variation trend of the forward slip value.

5. The method for determining the decay trend of roll roughness according to claim 4, characterized in that Determining the rolling mileage of the cold rolling mill in the stable rolling stage corresponding to each steel coil according to the rolling length of each steel coil comprises: The sum of the rolling lengths from the first steel coil to the current steel coil is determined as the rolling mileage of the cold rolling mill in the stable rolling stage corresponding to the current steel coil.

6. The method for determining the decay trend of roll roughness according to any one of claims 1 to 5, characterized in that: The rolling process parameters include: pass reduction rate, maximum roll speed, front tension, rear tension, stand outlet thickness, emulsion information, steel type and specification of the steel coil.

7. The method for determining the decay trend of roll roughness according to any one of claims 1 to 5, characterized in that: Determining the forward slip value of each steel coil according to the roll speed and the strip speed includes: determining a 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.

8. A device for determining a roll roughness decay trend, 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, the steps of the method according to any one of claims 1 to 7 are implemented.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer program instructions, which, when executed by a processor, prompt the processor to implement the steps of the method according to any one of claims 1 to 7.

10. A computer program product, comprising a computer program, characterized in that When the computer program product is executed by a processor, the processor is prompted to implement the steps of the method according to any one of claims 1 to 7.

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