Rolling control method, device, equipment and readable storage medium

Abstract

Embodiments of the present invention provide a rolling control method, device, equipment, and readable storage medium. By obtaining the actual forward slip value of the target steel strip, when the actual forward slip value is not within a first preset threshold range, the actual emulsion flow rate of the rolling mill is controlled based on the current emulsion flow rate and the emulsion forward slip coefficient; the actual tension value of the rolling mill is controlled based on the outlet tension setting value of the rolling mill and the tension forward slip coefficient; the actual reduction rate of the rolling mill is controlled based on the reduction rate setting value of the rolling mill and the negative of the reduction rate forward slip coefficient; and the target roughness of the working rolls of the rolling mill is determined based on the current roughness of the working rolls of the rolling mill and the working roll forward slip coefficient. Therefore, during the rolling process of the strip, a better lubrication effect is achieved, and the tension of the strip, the rolling force of the rolling mill, and the friction between the working rolls and the strip are all within a reasonable range, thereby reducing the instability of the rolling process and defects such as scratches or cracks in the strip.

Description

Technical Field

[0001] The present invention relates to the field of rolling technology, and in particular to a rolling control method, device, equipment and readable storage medium. Background Art

[0002] Forward slip is one of the key parameters to measure rolling stability.

[0003] If the forward slip is too small, the strip rolling process is prone to slippage, which makes the rolling unstable, reduces the thickness accuracy of the rolled strip, and easily causes scratches on the strip surface; if the forward slip is too large, it is easy to cause vibration of the rolling mill, making it impossible to achieve high-speed rolling, and it will also cause micro cracks on the strip surface, affecting the quality of the strip.

[0004] Therefore, how to ensure that the cold rolling mill can roll strip steel efficiently and stably is one of the difficult problems facing current rolling technology. Summary of the Invention

[0005] The embodiments of the present invention solve the technical problems of instability and low efficiency in the strip rolling process in the prior art by providing a rolling control method, device, equipment and readable storage medium.

[0006] In a first aspect, the present invention provides a rolling control method through an embodiment of the present invention, which is applied to a rolling mill, the method comprising: obtaining an actual forward slip value of a target strip, and when the actual forward slip value is not within a first preset threshold range, controlling the actual emulsion flow rate of the rolling mill based on the actual forward slip value of the rolling mill, the current emulsion flow rate, and the emulsion forward slip coefficient; controlling the actual emulsion flow rate of the rolling mill based on the actual forward slip value, the current emulsion flow rate, and the emulsion forward slip coefficient, comprising: if the actual forward slip value is within a second preset threshold range, calculating the actual emulsion flow rate based on the current emulsion flow rate and the negative of the emulsion forward slip coefficient; if the actual forward slip value is within a third preset threshold range, calculating the actual emulsion flow rate based on the current emulsion flow rate and the emulsion forward slip coefficient; wherein the upper limit value of the second preset threshold range is less than the lower limit value of the first preset threshold range, and the lower limit value of the third preset threshold range is greater than the upper limit value of the first preset threshold range.

[0007] Optionally, after controlling the actual emulsion flow rate of the rolling mill, it also includes: if the actual forward slip value is within a fourth preset threshold range, based on the outlet tension setting value of the rolling mill and the tension forward slip coefficient, controlling the actual tension value of the rolling mill; if the actual forward slip value is within a fifth preset threshold range, based on the outlet tension setting value and the negative of the tension forward slip coefficient, controlling the actual tension value of the rolling mill; wherein the upper limit value of the fourth preset threshold range is less than the lower limit value of the second preset threshold range, and the lower limit value of the fifth preset threshold range is greater than the upper limit value of the third preset threshold range.

[0008] Optionally, after controlling the actual tension value of the rolling mill, it also includes: if the actual forward slip value is within the sixth preset threshold range, controlling the actual reduction rate of the rolling mill based on the reduction rate setting value of the rolling mill and the negative number of the reduction rate forward slip coefficient; if the actual forward slip value is within the seventh preset threshold range, controlling the actual reduction rate of the rolling mill based on the reduction rate setting value and the reduction rate forward slip coefficient; wherein the upper limit value of the sixth preset threshold range is less than the lower limit value of the fourth preset threshold range, and the lower limit value of the seventh preset threshold range is greater than the upper limit value of the fifth preset threshold range.

[0009] Optionally, after controlling the actual reduction rate of the rolling mill, it also includes: if the actual forward slip value is less than the lower limit of the preset threshold, then based on the current roughness of the working roll of the rolling mill and the forward slip coefficient of the working roll, the target roughness of the working roll of the rolling mill is determined; if the actual forward slip value is greater than the upper limit of the preset threshold, then based on the current roughness and the negative of the forward slip coefficient of the working roll, the target roughness of the working roll of the rolling mill is determined; wherein the lower limit of the preset threshold is less than the lower limit value of the sixth preset threshold range, and the upper limit of the preset threshold is greater than the upper limit value of the seventh preset threshold range.

[0010] Optionally, the emulsion forward slip coefficient is any value between 0 and 0.5, and the emulsion forward slip coefficient is not 0; the tension forward slip coefficient is any value between 0 and 0.25, and the tension forward slip coefficient is not 0; the reduction rate forward slip coefficient is any value between 0 and 0.4, and the reduction rate forward slip coefficient is not 0; the working roll forward slip coefficient is any value between 0 and 0.3, and the working roll forward slip coefficient is not 0.

[0011] Optionally, the actual emulsion flow rate is calculated based on the current emulsion flow rate and the negative number of the emulsion forward slip coefficient, including: the actual emulsion flow rate is calculated based on the product of the current emulsion flow rate and the negative number of the emulsion forward slip coefficient; the actual emulsion flow rate is calculated based on the current emulsion flow rate and the emulsion forward slip coefficient, including: the actual emulsion flow rate is calculated based on the product of the current emulsion flow rate and the emulsion forward slip coefficient; the outlet tension setting value of the rolling mill and the tension The forward slip coefficient controls the actual tension value of the rolling mill, including: controlling the actual tension value of the rolling mill based on the product of the outlet tension setting value and the tension forward slip coefficient, the manual intervention tension value, the speed coupling tension value, and the roll gap coupling tension value; controlling the actual tension value of the rolling mill based on the outlet tension setting value and the negative number of the tension forward slip coefficient, including: controlling the actual tension value of the rolling mill based on the product of the outlet tension setting value and the negative number of the tension forward slip coefficient, the manual intervention tension value, the speed coupling tension value, and the roll gap coupling tension value.

[0012] Optionally, controlling the actual reduction rate of the rolling mill based on the reduction rate setting value of the rolling mill and the negative of the reduction rate forward slip coefficient includes: controlling the actual reduction rate of the rolling mill based on the product of the reduction rate setting value and the negative of the reduction rate forward slip coefficient; controlling the actual reduction rate of the rolling mill based on the reduction rate setting value and the reduction rate forward slip coefficient includes: controlling the actual reduction rate of the rolling mill based on the product of the reduction rate setting value and the reduction rate forward slip coefficient; determining the target roughness of the working roll of the rolling mill based on the current roughness of the working roll of the rolling mill and the working roll forward slip coefficient includes: determining the target roughness of the working roll of the rolling mill based on the product of the current roughness and the working roll forward slip coefficient; determining the target roughness of the working roll of the rolling mill based on the current roughness and the negative of the working roll forward slip coefficient includes: determining the target roughness of the working roll of the rolling mill based on the product of the current roughness and the negative of the working roll forward slip coefficient.

[0013] In a second aspect, the present invention provides a rolling control device according to an embodiment of the present invention, which is applied to a rolling mill, and the device includes:

[0014] an emulsion control unit, configured to obtain an actual forward slip value of the target steel strip and, when the actual forward slip value is not within a first preset threshold range, control the actual emulsion flow rate of the rolling mill based on the actual forward slip value of the rolling mill, a current emulsion flow rate, and an emulsion forward slip coefficient;

[0015] The emulsion control unit is specifically used to: when the actual forward slip value is within a second preset threshold range, calculate the actual emulsion flow rate based on the current emulsion flow rate and the negative of the emulsion forward slip coefficient; or when the actual forward slip value is within a third preset threshold range, calculate the actual emulsion flow rate based on the current emulsion flow rate and the emulsion forward slip coefficient; wherein the upper limit value of the second preset threshold range is less than the lower limit value of the first preset threshold range, and the lower limit value of the third preset threshold range is greater than the upper limit value of the first preset threshold range.

[0016] In a third aspect, the present invention provides a rolling control device through an embodiment of the present invention, comprising a memory, a processor, and a code stored in the memory and executable on the processor, wherein when the processor executes the code, any one of the implementations of the first aspect described above is implemented.

[0017] In a fourth aspect, the present invention provides a computer-readable storage medium through an embodiment of the present invention, on which a computer program is stored, and when the computer program is executed by a processor, any implementation method of the above-mentioned first aspect is implemented.

[0018] One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages:

[0019] First, the actual forward slip value of the target steel strip is obtained. If the actual forward slip value is not within the first preset threshold range, the actual emulsion flow rate of the rolling mill is controlled based on the actual forward slip value of the rolling mill, the current emulsion flow rate, and the emulsion forward slip coefficient. Specifically, if the actual forward slip value is within the second preset threshold range, the actual emulsion flow rate is calculated based on the current emulsion flow rate and the negative of the emulsion forward slip coefficient. If the actual forward slip value is within the third preset threshold range, the actual emulsion flow rate is calculated based on the current emulsion flow rate and the emulsion forward slip coefficient. Because the actual emulsion flow rate is related to the actual forward slip value, controlling the actual emulsion flow rate of the rolling mill can provide a better lubrication effect during the rolling of the strip, thereby reducing the instability of the rolling process caused by forward slip and reducing defects such as scratches or cracks in the strip. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 This is a flow chart of a rolling control method according to an embodiment of the present invention;

[0022] Figure 2 Schematic diagram of the structure of a rolling control device in an embodiment of the present invention;

[0023] Figure 3 A schematic diagram of the structure of a rolling control device in an embodiment of the present invention;

[0024] Figure 4 Schematic diagram of a computer-readable storage medium structure in an embodiment of the present invention. DETAILED DESCRIPTION

[0025] The embodiments of the present invention solve the technical problems of instability and low efficiency in the strip rolling process in the prior art by providing a rolling control method, device, equipment and readable storage medium.

[0026] The technical solution provided by the embodiments of the present invention is to solve the above technical problems, and the overall idea is as follows:

[0027] First, the actual forward slip value of the target steel strip is obtained. If it is detected that the actual forward slip value is not within a first preset threshold range, the actual emulsion flow rate of the rolling mill can be controlled based on the actual forward slip value, the current emulsion flow rate, and the emulsion forward slip coefficient. Specifically, if the actual forward slip value is within a second preset threshold range, the actual emulsion flow rate is calculated based on the current emulsion flow rate and the negative of the emulsion forward slip coefficient. If the actual forward slip value is within a third preset threshold range, the actual emulsion flow rate is calculated based on the current emulsion flow rate and the emulsion forward slip coefficient. Finally, the rolling process of the rolling mill can be controlled based on the actual emulsion flow rate.

[0028] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0029] First, the term "and / or" as used herein simply describes a relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A alone, A and B together, or B alone. Furthermore, the character " / " in this document generally indicates an "or" relationship between the associated objects.

[0030] It should be noted that the terms "first," "second," and the like in the specification and claims of the present invention and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, such that the embodiments of the present invention described herein can be implemented in an order other than that illustrated or described herein.

[0031] In a first aspect, the present invention provides, through one embodiment, a rolling control method that can be applied to a rolling mill, particularly a cold rolling mill. This rolling control method can effectively alleviate mill instability during strip rolling, enabling the mill to perform rolling more smoothly and efficiently, thereby improving the mill's rolling efficiency.

[0032] See Figure 1 As shown, the rolling control method may include the following steps:

[0033] Step S101: obtaining the actual forward slip value of the target steel strip.

[0034] Specifically, the actual forward slip value can be obtained based on the actual rolling speed of the rolling mill and the actual moving speed of the work roll.

[0035] In the specific implementation process, the actual forward slip value can be calculated using the following formula:

[0036] Sh=(Vh―Vr) / Vr

[0037] Where Sh is the actual forward slip value, Vh is the actual rolling speed of the rolling mill (i.e., the moving speed of the target strip at the mill exit), and Vr is the actual moving speed of the mill work roll.

[0038] To prevent the target strip forward slip from being too large or too small, a constraint can be set for the actual forward slip of the rolling mill based on the actual conditions of the rolling line. This constraint can be within a first preset threshold range. That is, when the actual forward slip falls within the first preset threshold range, the actual forward slip of the rolling mill is within a reasonable range, and the rolling mill is rolling normally.

[0039] If the actual forward slip value of the rolling mill is not within the first preset threshold range, step S102 is executed. The first preset threshold range can be set according to actual rolling conditions. In an optional embodiment, the upper limit of the first preset threshold range can be 2%, and the lower limit of the first preset threshold range can be 0.5%.

[0040] Step S102: When the actual forward slip value is not within the first preset threshold range, the actual emulsion flow rate of the rolling mill is controlled based on the actual forward slip value of the rolling mill, the current emulsion flow rate and the emulsion forward slip coefficient.

[0041] Specifically, if the actual forward slip value is not within the first preset threshold range but is within the second preset threshold range, the actual emulsion flow rate is calculated based on the current emulsion flow rate and the negative of the emulsion forward slip coefficient. In a specific implementation, the actual emulsion flow rate can be calculated based on the product of the current emulsion flow rate and the negative of the emulsion forward slip coefficient.

[0042] For example, the actual emulsion flow rate can be calculated using the following formula:

[0043] L 乳 =l 乳 ×(1―x)

[0044] Where, L 乳 is the actual emulsion flow rate, l 乳 is the current emulsion flow rate of the rolling mill, and x is the emulsion forward slip coefficient.

[0045] If the actual forward slip value is not within the first preset threshold range, but is within the third preset threshold range, the actual emulsion flow rate is calculated based on the current emulsion flow rate and the emulsion forward slip coefficient. In a specific implementation, the actual emulsion flow rate can be calculated based on the product of the current emulsion flow rate and the emulsion forward slip coefficient, and rolling oil is replenished based on the actual emulsion flow rate.

[0046] The greater the actual emulsion flow rate, the greater the amount of rolling oil to be supplemented. In an optional embodiment, if the actual emulsion flow rate is 3120 liters / minute, 200 liters of rolling oil need to be supplemented.

[0047] For example, the actual emulsion flow rate can be calculated using the following formula:

[0048] L 乳 =l 乳 ×(1+x)

[0049] Where, L 乳 is the actual emulsion flow rate, l 乳 is the current emulsion flow rate of the rolling mill, and x is the emulsion forward slip coefficient.

[0050] The upper limit of the second preset threshold range is less than the lower limit of the first preset threshold range, and the lower limit of the third preset threshold range is greater than the upper limit of the first preset threshold range. In an optional embodiment, the second preset threshold range may be [0, 0.5%), i.e., the lower limit of the second preset threshold range may be 0%; and the third preset threshold range may be (2%, 3%), i.e., the upper limit of the third preset threshold range may be 3%.

[0051] The forward slip coefficient of the emulsion is any value between 0 and 0.5, and the forward slip coefficient of the emulsion is not 0. In an optional embodiment, the forward slip coefficient of the emulsion may be 0.3.

[0052] As an optional embodiment, after controlling the actual emulsion flow rate of the rolling mill, if the actual forward slip value is within a fourth preset threshold range, the actual tension value of the rolling mill is controlled based on the mill's outlet tension setpoint and the tension forward slip coefficient. In a specific implementation, the actual tension value of the rolling mill can be controlled based on the product of the outlet tension setpoint and the tension forward slip coefficient, the manual intervention tension value, the speed-coupled tension value, and the roll gap-coupled tension value.

[0053] For example, the actual tension value can be calculated using the following formula:

[0054] L 张 力 =l 张 力 ×z+l1+l2+l3

[0055] Where, L 张力 is the actual tension value of the target strip rolled by the rolling mill, l 张力 is the exit tension setting value of the target strip rolled by the rolling mill, z is the tension slip coefficient, l1 is the manual intervention tension value, l2 is the speed coupling tension value, and l3 is the roll gap coupling tension value.

[0056] If the actual forward slip value is within the fifth preset threshold range, the actual tension value of the rolling mill is controlled based on the exit tension set value and the negative of the tension forward slip coefficient. In a specific implementation, the actual tension value of the rolling mill can be controlled based on the product of the exit tension set value and the negative of the tension forward slip coefficient, the manual intervention tension value, the speed-coupled tension value, and the roll gap-coupled tension value.

[0057] For example, the actual tension value can be calculated using the following formula:

[0058] L 张 力 =l 张 力 ×(―z)+l1+l2+l3

[0059] Where, L 张力 is the actual tension value of the target strip rolled by the rolling mill, l 张力 is the exit tension setting value of the target strip rolled by the rolling mill, z is the tension slip coefficient, l1 is the manual intervention tension value, l2 is the speed coupling tension value, and l3 is the roll gap coupling tension value.

[0060] The upper limit of the fourth preset threshold range is less than the lower limit of the second preset threshold range, and the lower limit of the fifth preset threshold range is greater than the upper limit of the third preset threshold range. In an optional embodiment, the fourth preset threshold range may be [-1%, 0), i.e., the lower limit of the fourth preset threshold range may be -1%; and the fifth preset threshold range may be (3%, 3.5%), i.e., the upper limit of the third preset threshold range may be 3.5%.

[0061] The tension forward slip coefficient is any value between 0 and 0.25, and the tension forward slip coefficient is not 0. In an optional embodiment, the tension forward slip coefficient may be 0.2.

[0062] As an optional embodiment, after controlling the actual tension value of the rolling mill, if the actual forward slip value is within a sixth preset threshold range, the actual reduction ratio of the rolling mill is controlled based on the rolling mill's reduction ratio set value and the negative of the reduction ratio forward slip coefficient. In a specific implementation, the actual reduction ratio of the rolling mill can be controlled based on the product of the reduction ratio set value and the negative of the reduction ratio forward slip coefficient.

[0063] For example, the actual reduction rate can be calculated using the following formula:

[0064] L 压下 =l 压下 ×(1―q)

[0065] Where, L 压下 is the actual reduction ratio of the target strip rolled by the rolling mill, l 压下 is the set value of the reduction rate of the target strip rolled by the rolling mill, and q is the forward slip coefficient of the reduction rate.

[0066] If the actual forward slip value is within the seventh preset threshold range, the actual reduction rate of the rolling mill is controlled based on the reduction rate set value and the reduction rate forward slip coefficient. In a specific implementation, the actual reduction rate of the rolling mill can be controlled based on the product of the reduction rate set value and the reduction rate forward slip coefficient.

[0067] For example, the actual reduction rate can be calculated using the following formula:

[0068] L 压下 =l 压下 ×(1+q)

[0069] Where, L 压下 is the actual reduction ratio of the target strip rolled by the rolling mill, l 压下 is the set value of the reduction rate of the target strip rolled by the rolling mill, and q is the forward slip coefficient of the reduction rate.

[0070] The upper limit of the sixth preset threshold range is less than the lower limit of the fourth preset threshold range, and the lower limit of the seventh preset threshold range is greater than the upper limit of the fifth preset threshold range. In an optional embodiment, the sixth preset threshold range may be [-2%, -1%), i.e., the lower limit of the sixth preset threshold range may be -2%; and the seventh preset threshold range may be (3.5%, 4.5%), i.e., the upper limit of the seventh preset threshold range may be 4.5%.

[0071] The forward slip coefficient of the reduction rate is any value between 0 and 0.4, and the forward slip coefficient of the reduction rate is not 0; in an optional embodiment, the forward slip coefficient of the reduction rate may be 0.2.

[0072] As an optional embodiment, after controlling the actual rolling reduction rate of the rolling mill, if the actual forward slip value is less than a preset lower threshold, a target roughness of the mill's work rolls is determined based on the current roughness of the mill's work rolls and the work roll forward slip coefficient. In a specific implementation, the target roughness of the mill's work rolls can be determined based on the product of the current roughness and the work roll forward slip coefficient.

[0073] For example, the target roughness can be calculated using the following formula:

[0074] L 粗 糙 =l 粗 糙 ×(1+r)

[0075] Where, L 粗糙 is the target roughness of the mill work roll, l 粗糙 is the current roughness of the working roll of the rolling mill, and r is the forward slip coefficient of the working roll.

[0076] If the actual forward slip value is greater than a preset upper threshold value, a target roughness of the work rolls of the rolling mill is determined based on the current roughness and the negative of the work roll forward slip coefficient. In a specific implementation, the target roughness of the work rolls of the rolling mill can be determined based on the product of the current roughness and the negative of the work roll forward slip coefficient.

[0077] For example, the target roughness can be calculated using the following formula:

[0078] L 粗 糙 =l 粗 糙 ×(1―r)

[0079] Where, L 粗糙 is the target roughness of the mill work roll, l 粗糙 is the current roughness of the working roll of the rolling mill, and r is the forward slip coefficient of the working roll.

[0080] The lower limit of the preset threshold is less than the lower limit of the sixth preset threshold range, and the upper limit of the preset threshold is greater than the upper limit of the seventh preset threshold range. In an optional embodiment, the lower limit of the preset threshold can be -2%; the upper limit of the preset threshold can be 4.5%.

[0081] The forward slip coefficient of the working roll is any value between 0 and 0.3, and the forward slip coefficient of the working roll is not 0. In an optional embodiment, the forward slip coefficient of the working roll may be 0.2.

[0082] It should be noted that when it is detected that the actual forward slip value of the target strip rolled by the rolling mill is less than the preset lower threshold value, or when it is detected that the actual forward slip value of the target strip rolled by the rolling mill is greater than the preset upper threshold value, the rolling mill is controlled to stop and a working roll with a target roughness is selected to replace the current working roll of the rolling mill.

[0083] On the second aspect, based on the same inventive concept, the present invention provides a rolling control device through an embodiment of the present invention, which can be applied to a rolling mill, especially a cold rolling mill.

[0084] See Figure 2 As shown, the rolling control device may include:

[0085] an emulsion control unit 201 for obtaining an actual forward slip value of the target steel strip and, when the actual forward slip value is not within a first preset threshold range, controlling the actual emulsion flow rate of the rolling mill based on the actual forward slip value of the rolling mill, the current emulsion flow rate, and the emulsion forward slip coefficient;

[0086] The emulsion control unit 201 is used to calculate the actual emulsion flow rate based on the current emulsion flow rate and the negative of the emulsion forward slip coefficient when the actual forward slip value is within the second preset threshold range; or to calculate the actual emulsion flow rate based on the current emulsion flow rate and the emulsion forward slip coefficient when the actual forward slip value is within the third preset threshold range.

[0087] As an optional embodiment, the emulsion control unit 201 is specifically used to: when the actual forward slip value is within the second preset threshold range, calculate the actual emulsion flow rate based on the product of the current emulsion flow rate and the negative of the emulsion forward slip coefficient; or when the actual forward slip value is within the third preset threshold range, calculate the actual emulsion flow rate based on the product of the current emulsion flow rate and the emulsion forward slip coefficient.

[0088] The upper limit of the second preset threshold range is smaller than the lower limit of the first preset threshold range, and the lower limit of the third preset threshold range is larger than the upper limit of the first preset threshold range.

[0089] As an optional embodiment, the rolling control device further includes:

[0090] The tension control unit 202 is used to control the actual tension value of the rolling mill based on the outlet tension setting value and the tension forward slip coefficient of the rolling mill when the actual forward slip value is within the fourth preset threshold range; or to control the actual tension value of the rolling mill based on the outlet tension setting value and the negative number of the tension forward slip coefficient when the actual forward slip value is within the fifth preset threshold range.

[0091] The tension control unit 202 is specifically used to: when the actual forward slip value is within the fourth preset threshold range, control the actual tension value of the rolling mill based on the product of the outlet tension setting value and the tension forward slip coefficient, the manual intervention tension value, the speed coupling tension value, and the roll gap coupling tension value; or when the actual forward slip value is within the fifth preset threshold range, control the actual tension value of the rolling mill based on the product of the outlet tension setting value and the negative of the tension forward slip coefficient, the manual intervention tension value, the speed coupling tension value, and the roll gap coupling tension value.

[0092] The upper limit of the fourth preset threshold range is smaller than the lower limit of the second preset threshold range, and the lower limit of the fifth preset threshold range is larger than the upper limit of the third preset threshold range.

[0093] As an optional embodiment, the rolling control device further includes:

[0094] The reduction rate control unit 203 is used to control the actual reduction rate of the rolling mill based on the reduction rate setting value of the rolling mill and the negative of the reduction rate forward slip coefficient when the actual forward slip value is within the sixth preset threshold range; or to control the actual reduction rate of the rolling mill based on the reduction rate setting value and the reduction rate forward slip coefficient when the actual forward slip value is within the seventh preset threshold range.

[0095] The reduction rate control unit 203 is specifically used to: when the actual forward slip value is within the sixth preset threshold range, control the actual reduction rate of the rolling mill based on the product of the reduction rate setting value and the negative of the reduction rate forward slip coefficient; or when the actual forward slip value is within the seventh preset threshold range, control the actual reduction rate of the rolling mill based on the product of the reduction rate setting value and the reduction rate forward slip coefficient.

[0096] The upper limit of the sixth preset threshold range is smaller than the lower limit of the fourth preset threshold range, and the lower limit of the seventh preset threshold range is larger than the upper limit of the fifth preset threshold range.

[0097] As an optional embodiment, the rolling control device further includes:

[0098] The rolling mill control unit 204 is used to determine the target roughness of the working roll of the rolling mill based on the current roughness of the working roll of the rolling mill and the working roll forward slip coefficient when the actual forward slip value is less than the preset lower threshold value; or to determine the target roughness of the working roll of the rolling mill based on the current roughness and the negative of the working roll forward slip coefficient when the actual forward slip value is greater than the preset upper threshold value.

[0099] The rolling mill control unit 204 is specifically used to: when the actual forward slip value is less than the preset lower threshold value, determine the target roughness of the working roll of the rolling mill based on the product of the current roughness and the working roll forward slip coefficient; or when the actual forward slip value is greater than the preset upper threshold value, determine the target roughness of the working roll of the rolling mill based on the product of the current roughness and the negative of the working roll forward slip coefficient.

[0100] The lower limit of the preset threshold is smaller than the lower limit of the sixth preset threshold range, and the upper limit of the preset threshold is larger than the upper limit of the seventh preset threshold range.

[0101] As an optional embodiment, the above-mentioned emulsion forward slip coefficient is any value between 0 and 0.5, and the emulsion forward slip coefficient is not 0; the above-mentioned tension forward slip coefficient is any value between 0 and 0.25, and the tension forward slip coefficient is not 0; the above-mentioned reduction rate forward slip coefficient is any value between 0 and 0.4, and the reduction rate forward slip coefficient is not 0; the above-mentioned working roll forward slip coefficient is any value between 0 and 0.3, and the working roll forward slip coefficient is not 0.

[0102] Since the rolling control device described in this embodiment is an electronic device used to implement the rolling control method in the embodiment of the present invention, those skilled in the art will be able to understand the specific implementation and various variations of the electronic device in this embodiment based on the rolling control method described in the embodiment of the present invention. Therefore, how the electronic device implements the method in the embodiment of the present invention will not be described in detail here. As long as those skilled in the art can implement the electronic device used in the rolling control method in the embodiment of the present invention, it falls within the scope of protection of the present invention.

[0103] On the third aspect, based on the same inventive concept, an embodiment of the present invention provides a rolling control device that can be applied to a rolling mill, in particular to a cold rolling mill.

[0104] refer to Figure 3 As shown, the rolling control device provided by the embodiment of the present invention includes: a memory 301, a processor 302 and a code stored in the memory and executable on the processor 302. When executing the code, the processor 302 implements any one of the aforementioned implementations of the rolling control method.

[0105] Among them, Figure 3In the embodiment of the present invention, a bus architecture (represented by bus 300) is shown. Bus 300 may include any number of interconnected buses and bridges, and bus 300 links together various circuits including one or more processors represented by processor 302 and memory represented by memory 301. Bus 300 may also link together various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein. Bus interface 303 provides an interface between bus 300 and receiver 303 and transmitter 304. Receiver 303 and transmitter 304 may be the same component, namely a transceiver, which provides a unit for communicating with various other devices over a transmission medium. Processor 302 is responsible for managing bus 300 and general processing, while memory 301 may be used to store data used by processor 302 when performing operations.

[0106] Fourthly, Figure 4 As shown, based on the same inventive concept, the present invention provides a computer-readable storage medium 400 through an embodiment of the present invention, on which a computer program 401 is stored. When the computer program 401 is executed by a processor, any implementation method of the above-mentioned rolling control method is implemented.

[0107] The technical solutions in the above embodiments of the present invention have at least the following technical effects or advantages:

[0108] The embodiment of the present invention establishes a correlation between the actual forward slip value and the actual emulsion flow rate, actual tension value, actual reduction rate, and target roughness. By controlling the actual emulsion flow rate of the rolling mill, a better lubrication effect can be provided during the rolling of the strip; by controlling the actual tension value of the rolling mill, the strip tension can be kept within a reasonable range during the rolling of the strip; by controlling the actual reduction rate of the rolling mill, the rolling force can be kept within a reasonable range during the rolling of the strip; by replacing the working rolls of the rolling mill, the working rolls can reach the target roughness and maintain a reasonable friction force between the working rolls and the strip. As described above, the embodiment of the present invention can at least reduce the instability of the rolling process caused by forward slip and reduce defects such as scratches or cracks in the strip.

[0109] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer products. Thus, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) containing computer-usable code.

[0110] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as combinations of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer instructions. These computer instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the process in the flowchart and / or block diagram. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0111] These computer instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0112] These computer instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 The steps for the function specified in one or more boxes.

[0113] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0114] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A rolling control method, characterized in that: Applied to a rolling mill, the method comprises: obtaining an actual forward slip value of the target steel strip, and, when the actual forward slip value is not within a first preset threshold range, controlling the actual emulsion flow rate of the rolling mill based on the actual forward slip value of the rolling mill, a current emulsion flow rate, and an emulsion forward slip coefficient; The controlling the actual emulsion flow rate of the rolling mill based on the actual forward slip value, the current emulsion flow rate, and the emulsion forward slip coefficient of the rolling mill includes: if the actual forward slip value is within a second preset threshold range, calculating the actual emulsion flow rate based on the current emulsion flow rate and the negative of the emulsion forward slip coefficient; if the actual forward slip value is within a third preset threshold range, calculating the actual emulsion flow rate based on the current emulsion flow rate and the emulsion forward slip coefficient; The upper limit of the second preset threshold range is smaller than the lower limit of the first preset threshold range, and the lower limit of the third preset threshold range is larger than the upper limit of the first preset threshold range.

2. The method according to claim 1, wherein After controlling the actual emulsion flow rate of the rolling mill, the method further comprises: If the actual forward slip value is within a fourth preset threshold range, controlling the actual tension value of the rolling mill based on the exit tension setting value of the rolling mill and the tension forward slip coefficient; If the actual forward slip value is within a fifth preset threshold range, controlling the actual tension value of the rolling mill based on the outlet tension setting value and the negative number of the tension forward slip coefficient; The upper limit of the fourth preset threshold range is smaller than the lower limit of the second preset threshold range, and the lower limit of the fifth preset threshold range is larger than the upper limit of the third preset threshold range.

3. The method according to claim 2, wherein After controlling the actual tension value of the rolling mill, the method further includes: If the actual forward slip value is within a sixth preset threshold range, controlling the actual reduction rate of the rolling mill based on the reduction rate set value of the rolling mill and the negative number of the reduction rate forward slip coefficient; If the actual forward slip value is within a seventh preset threshold range, controlling the actual reduction rate of the rolling mill based on the reduction rate set value and the reduction rate forward slip coefficient; The upper limit of the sixth preset threshold range is smaller than the lower limit of the fourth preset threshold range, and the lower limit of the seventh preset threshold range is larger than the upper limit of the fifth preset threshold range.

4. The method according to claim 3, wherein After controlling the actual reduction rate of the rolling mill, the method further includes: If the actual forward slip value is less than a preset threshold lower limit, determining a target roughness of the work roll of the rolling mill based on the current roughness of the work roll of the rolling mill and the forward slip coefficient of the work roll; If the actual forward slip value is greater than a preset upper threshold value, determining a target roughness of the work roll of the rolling mill based on the current roughness and the negative of the work roll forward slip coefficient; The lower limit of the preset threshold is smaller than the lower limit of the sixth preset threshold range, and the upper limit of the preset threshold is larger than the upper limit of the seventh preset threshold range.

5. The method according to claim 4, wherein The emulsion forward slip coefficient is any value between 0 and 0.5, and the emulsion forward slip coefficient is not 0; The tension forward sliding coefficient is any value between 0 and 0.25, and the tension forward sliding coefficient is not 0; The forward slip coefficient of the reduction rate is any value between 0 and 0.4, and the forward slip coefficient of the reduction rate is not 0; The working roll forward slip coefficient is any value between 0 and 0.3, and the working roll forward slip coefficient is not 0.

6. The method according to claim 2, wherein The calculating the actual emulsion flow rate based on the current emulsion flow rate and the negative number of the emulsion forward slip coefficient includes: calculating the actual emulsion flow rate based on the product of the current emulsion flow rate and the negative number of the emulsion forward slip coefficient; The calculating the actual emulsion flow rate based on the current emulsion flow rate and the emulsion forward slip coefficient includes: calculating the actual emulsion flow rate based on the product of the current emulsion flow rate and the emulsion forward slip coefficient; The controlling of the actual tension value of the rolling mill based on the outlet tension setting value and the tension forward slip coefficient of the rolling mill includes: controlling the actual tension value of the rolling mill based on the product of the outlet tension setting value and the tension forward slip coefficient, the manual intervention tension value, the speed coupling tension value, and the roll gap coupling tension value; Based on the outlet tension setting value and the negative number of the tension forward slip coefficient, the actual tension value of the rolling mill is controlled, including: based on the product of the outlet tension setting value and the negative number of the tension forward slip coefficient, the manual intervention tension value, the speed coupling tension value and the roll gap coupling tension value, the actual tension value of the rolling mill is controlled.

7. The method according to claim 4, wherein The controlling the actual reduction rate of the rolling mill based on the reduction rate setting value of the rolling mill and the negative number of the reduction rate forward slip coefficient includes: controlling the actual reduction rate of the rolling mill based on the product of the reduction rate setting value and the negative number of the reduction rate forward slip coefficient; The controlling the actual reduction rate of the rolling mill based on the reduction rate setting value and the reduction rate forward slip coefficient includes: controlling the actual reduction rate of the rolling mill based on the product of the reduction rate setting value and the reduction rate forward slip coefficient; Determining the target roughness of the work roll of the rolling mill based on the current roughness of the work roll of the rolling mill and the forward slip coefficient of the work roll includes: determining the target roughness of the work roll of the rolling mill based on the product of the current roughness and the forward slip coefficient of the work roll; Determining the target roughness of the working roll of the rolling mill based on the current roughness and the negative number of the working roll forward slip coefficient includes: determining the target roughness of the working roll of the rolling mill based on the product of the current roughness and the negative number of the working roll forward slip coefficient.

8. A rolling control device, characterized in that: Applied to a rolling mill, the device comprises: an emulsion control unit, configured to obtain an actual forward slip value of the target steel strip and, when the actual forward slip value is not within a first preset threshold range, control the actual emulsion flow rate of the rolling mill based on the actual forward slip value of the rolling mill, a current emulsion flow rate, and an emulsion forward slip coefficient; The emulsion control unit is specifically used to: when the actual forward slip value is within a second preset threshold range, calculate the actual emulsion flow rate based on the current emulsion flow rate and the negative of the emulsion forward slip coefficient; or when the actual forward slip value is within a third preset threshold range, calculate the actual emulsion flow rate based on the current emulsion flow rate and the emulsion forward slip coefficient; wherein the upper limit value of the second preset threshold range is less than the lower limit value of the first preset threshold range, and the lower limit value of the third preset threshold range is greater than the upper limit value of the first preset threshold range.

9. A rolling control device comprising a memory, a processor, and a code stored in the memory and executable on the processor, characterized in that: When the processor executes the code, the method according to any one of claims 1 to 7 is implemented.

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

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