A cold-rolled target plate shape control method and device, electronic equipment and medium

Abstract

The application discloses a cold-rolled target plate shape control method and device, electronic equipment and medium, comprising: obtaining the width of the strip steel, the steel grade and the rolling speed of the strip steel; based on the width of the strip steel, determining the minimum channel and the maximum channel of the current plate shape instrument; based on the steel grade, the rolling speed, the minimum channel and the maximum channel, determining the target flatness of the minimum channel and the target flatness of the maximum channel of the plate shape instrument; obtaining the actual flatness of the minimum channel and the actual flatness of the maximum channel of the plate shape instrument, and based on the actual flatness of the minimum channel, the actual flatness of the maximum channel, the target flatness of the minimum channel and the target flatness of the maximum channel, controlling the edge plate shape of the strip steel. The control method can achieve the purpose of flexible control of the plate shape, realize the smooth and stable rolling of the cold rolling, and improve the problem that the edge plate shape of the strip steel does not meet the demand due to the change of the strip steel parameters.

Description

Technical Field

[0001] The present invention relates to the field of rolling technology, and in particular to a method, device, electronic equipment and medium for controlling a cold-rolled target plate shape. Background Art

[0002] Automatic flatness control is a core control technology for plate and strip rolling and is a comprehensive approach. The flatness target curve is a crucial component of the cold rolling mill's flatness control system. Existing target flatness settings are primarily parabolic, making it difficult to design for specific channels. This results in automatic flatness control failing to meet the flatness requirements of high-end product rolling. Therefore, it is crucial to develop a control method for cold rolling target flatness, specifically targeting channel-specific flatness target curves. Summary of the Invention

[0003] The embodiments of the present application provide a control method, device, electronic equipment and medium for the target plate shape of cold rolling. The control method can achieve the purpose of flexible control of the plate shape, realize smooth and stable cold rolling, improve the problem of the plate shape of the edge of the strip not meeting the requirements due to changes in strip parameters, and improve the plate shape quality of the product.

[0004] In a first aspect, the present invention provides the following technical solutions through an embodiment of the present invention:

[0005] A method for controlling a cold-rolled target plate shape, comprising:

[0006] Obtain the width, steel type and rolling speed of the strip; determine the minimum channel and maximum channel of the shape meter based on the width of the strip; determine the target flatness of the minimum channel of the shape meter, the target flatness of the maximum channel, the control dead zone of the target flatness and the control dead zone under leveling based on the steel type, the rolling speed, the minimum channel and the maximum channel; obtain the actual flatness of the minimum channel and the actual flatness of the maximum channel, and control the edge flatness of the strip based on the actual flatness of the minimum channel, the actual flatness of the maximum channel, the target flatness of the minimum channel, the target flatness of the maximum channel, the control dead zone of the target flatness and the control dead zone under leveling.

[0007] Preferably, the minimum channel and the maximum channel of the shape meter are determined based on the width of the strip, including: calculating the minimum channel number and the maximum channel number of the shape meter based on the width of the strip; and determining the minimum channel and the maximum channel of the shape meter based on the minimum channel number and the maximum channel number.

[0008] Preferably, the target flatness of the minimum channel, the target flatness of the maximum channel, the control dead zone of the target flatness and the control dead zone under leveling are determined based on the steel grade, the rolling speed, the minimum channel and the maximum channel, including: if the rolling speed is less than the preset rolling speed, the first target flatness is determined as the target flatness of the minimum channel and the target flatness of the maximum channel, and the first control dead zone is determined as the control dead zone of the target flatness; if the rolling speed is greater than or equal to the preset rolling speed, the second target flatness is determined as the target flatness of the minimum channel and the target flatness of the maximum channel based on the steel grade, and the second control dead zone is determined as the control dead zone of the target flatness; based on the steel grade, the control dead zone under leveling is determined.

[0009] Preferably, the edge flatness of the strip is controlled based on the actual flatness of the minimum channel, the actual flatness of the maximum channel, the target flatness of the minimum channel, the target flatness of the maximum channel, the control dead zone of the target flatness, and the control dead zone under leveling, including: determining the flatness deviation of the working side of the strip based on the actual flatness of the minimum channel and the target flatness of the minimum channel; determining the flatness deviation of the transmission side of the strip based on the actual flatness of the maximum channel and the target flatness of the maximum channel; and controlling the edge flatness of the strip based on the working side flatness deviation, the transmission side flatness deviation, and the control dead zone of the target flatness.

[0010] Preferably, the edge flatness of the strip is controlled based on the working side flatness deviation, the transmission side flatness deviation and the control dead zone of the target flatness, including: if the absolute value of the working side flatness deviation and the absolute value of the transmission side flatness deviation are both less than or equal to the control dead zone of the target flatness, the edge flatness is rolled normally; if the absolute value of the working side flatness deviation and / or the absolute value of the transmission side flatness deviation is greater than the control dead zone of the target flatness, and the absolute value of the difference between the working side flatness deviation and the transmission side flatness deviation is less than or equal to the control dead zone under leveling, the edge flatness is controlled by roller shifting; if the absolute value of the working side flatness deviation and / or the absolute value of the transmission side flatness deviation is greater than the control dead zone of the target flatness, and the absolute value of the difference between the working side flatness deviation and the transmission side flatness deviation is greater than the control dead zone under leveling, the edge flatness is controlled by leveling.

[0011] Preferably, the roller shifting control of the edge plate shape includes: determining the roller shifting amount based on the working side plate shape deviation, the transmission side plate shape deviation and a preset roller shifting plate shape gain; and performing the roller shifting control on the edge plate shape based on the roller shifting amount.

[0012] Preferably, the leveling control of the edge plate shape includes: determining the leveling amount based on the working side plate shape deviation, the transmission side plate shape deviation and a preset leveling plate shape gain; performing leveling control on the edge plate shape based on the leveling amount, so that the absolute value of the working side plate shape deviation and / or the absolute value of the transmission side plate shape deviation is less than or equal to the control dead zone under leveling, and then performing the roller shifting control.

[0013] In a second aspect, the present invention provides the following technical solution through an embodiment of the present invention:

[0014] A control device for a cold-rolled target plate shape, comprising:

[0015] A parameter acquisition module, used to obtain the width, steel type and rolling speed of the strip;

[0016] a channel determination module, configured to determine a minimum channel and a maximum channel of a shape meter based on the width of the strip;

[0017] a determination module, configured to determine, based on the steel grade, the rolling speed, the minimum channel, and the maximum channel, a target straightness of the minimum channel, a target straightness control dead zone of the target straightness, and a control dead zone under leveling;

[0018] The edge flatness control module is used to obtain the actual flatness of the minimum channel and the actual flatness of the maximum channel of the flatness meter, and control the edge flatness of the strip based on the actual flatness of the minimum channel, the actual flatness of the maximum channel, the target flatness of the minimum channel, the target flatness of the maximum channel, the control dead zone of the target flatness, and the control dead zone under leveling.

[0019] In a third aspect, the present invention provides the following technical solution through an embodiment of the present invention:

[0020] An electronic device comprises: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the steps of any one of the methods described in the first aspect are implemented.

[0021] In a fourth aspect, the present invention provides the following technical solution through an embodiment of the present invention:

[0022] A computer-readable storage medium stores a computer program, which, when executed by a processor, implements the steps of the method described in any one of the first aspects above.

[0023] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0024] The control method of the target shape of cold rolling provided by an embodiment of the present invention first obtains the width, steel type and rolling speed of the strip; then, based on the width of the strip, determines the minimum channel and maximum channel of the shape meter; then, based on the steel type of the strip, the rolling speed of the strip, the minimum channel and the maximum channel, determines the target flatness of the minimum channel of the shape meter, the target flatness of the maximum channel, the control dead zone of the target flatness and the control dead zone under leveling; finally, obtains the actual flatness of the minimum channel and the actual flatness of the maximum channel of the shape meter, and controls the edge shape of the strip based on the actual flatness of the minimum channel, the actual flatness of the maximum channel, the target flatness of the minimum channel, the target flatness of the maximum channel, the control dead zone of the target flatness and the control dead zone under leveling. This application derives the effective channel of the edge of the strip according to the width of the strip, and derives the target flatness of the plate edge according to the steel type and rolling speed of the strip, thereby flexibly adjusting the rolling process to achieve the purpose of flexibly controlling the strip shape, so that the edge shape of the strip always meets the requirements of the target curve, improves the problem of the edge shape of the strip not meeting the requirements due to changes in strip parameters, realizes smooth cold rolling, and improves the plate quality of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] 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.

[0026] Figure 1 A flow chart of a method for controlling a cold-rolled target flatness according to an embodiment of the present invention;

[0027] Figure 2 A schematic diagram of a method for calculating edge channels provided by an embodiment of the present invention;

[0028] Figure 3 A schematic diagram of a method for achieving target flatness of a plate width edge provided by an embodiment of the present invention;

[0029] Figure 4 A schematic diagram of a method for controlling the edge shape provided by an embodiment of the present invention;

[0030] Figure 5A schematic structural diagram of a control device for a cold-rolled target plate shape according to an embodiment of the present invention;

[0031] Figure 6 A schematic structural diagram of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0032] The embodiments of the present application provide a control method, device, electronic equipment and medium for the target plate shape of cold rolling. The control method can achieve the purpose of flexible control of the plate shape, realize smooth and stable cold rolling, improve the problem of the plate shape of the edge of the strip not meeting the requirements due to changes in strip parameters, and improve the plate shape quality of the product.

[0033] The overall idea of ​​the technical solution of the embodiment of this application is as follows:

[0034] A method for controlling a target shape of cold rolling comprises: obtaining the width of a steel strip, the type of steel, and the rolling speed of the steel strip; determining a minimum channel and a maximum channel of a shape meter based on the width of the steel strip; determining a target flatness of the minimum channel of the shape meter, a target flatness of the maximum channel, a control dead zone of the target flatness, and a control dead zone under leveling based on the steel type, the rolling speed, the minimum channel, and the maximum channel; obtaining the actual flatness of the minimum channel and the actual flatness of the maximum channel of the shape meter, and controlling the edge shape of the steel strip based on the actual flatness of the minimum channel, the actual flatness of the maximum channel, the target flatness of the minimum channel, the target flatness of the maximum channel, the control dead zone of the target flatness, and the control dead zone under leveling.

[0035] 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.

[0036] In a first aspect, an embodiment of the present invention provides a method for controlling a cold-rolled target plate shape, specifically, as follows: Figure 1 As shown, the method includes the following steps S101 to S104.

[0037] Step S101, obtaining the width, steel type and rolling speed of the steel strip.

[0038] During the specific implementation process, the width of the strip can be collected through instruments such as a width gauge, and the rolling speed of the strip can be collected through a speed meter.

[0039] Step S102: determining the minimum channel and the maximum channel of the shape meter based on the width of the strip.

[0040] In the specific implementation process, Figure 2As shown, based on the width of the strip, the minimum channel and the maximum channel of the flatness meter are determined, which can specifically include: calculating the minimum channel number and the maximum channel number of the flatness meter based on the width of the strip; and determining the minimum channel and the maximum channel number of the flatness meter based on the minimum channel number and the maximum channel number.

[0041] Based on the width of the strip, the minimum channel number and the maximum channel number of the shape meter are calculated, which may specifically include: determining the strip width ratio based on the total width of the shape meter channel, the edge channel width of the shape meter and the width of the strip; determining the minimum channel number and the maximum channel number based on the strip width ratio and the total channels of the shape meter.

[0042] In a specific implementation, the minimum channel number can be obtained according to the ratio of the strip width; the maximum channel number can be obtained according to the minimum channel number and the total channels of the flatness meter.

[0043] Specifically, the strip width ratio = ((total width of the shape meter channel - strip width) / shape meter edge channel width) / 2;

[0044] Minimum channel number = (strip width ratio) rounded to an integer;

[0045] Maximum channel number = total channels of the shape analyzer - minimum channel number + 1.

[0046] Based on the minimum channel number and the maximum channel number, the minimum channel and the maximum channel of the plate shape meter are determined, which may specifically include: obtaining the coverage rate of the minimum channel and the coverage rate of the maximum channel according to the minimum channel number and the proportion of the strip width; comparing the coverage rate of the minimum channel with the preset edge coverage rate a to obtain the minimum channel and the maximum channel.

[0047] Specifically, the coverage of the minimum channel = the minimum channel number - the proportion of strip width;

[0048] The coverage of the largest channel = the smallest channel number - the proportion of strip width;

[0049] If the coverage of the minimum channel is greater than the preset edge coverage a, then the minimum channel = the minimum channel number; otherwise, the minimum channel = the minimum channel number + 1;

[0050] If the coverage of the maximum channel is greater than the preset edge coverage a, then the maximum channel = the maximum channel number; otherwise, the maximum channel = the maximum channel number - 1.

[0051] The preset edge coverage ratio a can be set according to actual conditions. For example, the preset edge coverage ratio a in this application ranges from 40% to 50%.

[0052] Assuming that the total channel width of the shape meter is 1352 mm, the strip width is 1200 mm, the edge channel width of the shape meter is 26 mm, the total channels of the shape meter are 38, and the preset edge coverage is 45%, the calculation of the minimum and maximum channels mentioned above is demonstrated in a specific example below:

[0053] Strip width ratio = (total width of shape meter channel - strip width) / shape meter edge channel width / 2 = (1352mm - 1200mm) / 26mm / 2 = 2.923;

[0054] Minimum channel number = integer (strip width ratio) = integer (2.923) = 3;

[0055] Maximum channel number = total channels of the shape meter - minimum channel number + 1 = 38 - 3 + 1 = 36;

[0056] The coverage of the minimum and maximum channels = minimum channel number - strip width ratio = 3 - 2.923 = 7.7%;

[0057] The coverage of the minimum channel is 7.7% < the preset edge coverage of 45%, and the minimum channel = the minimum channel number + 1 = 3 + 1 = 4;

[0058] The coverage of the maximum channel is 7.7% < the preset edge coverage of 45%, and the maximum channel = the maximum channel number - 1 = 36 - 1 = 35.

[0059] Step S103, based on the steel type, the rolling speed, the minimum channel and the maximum channel, determine the target flatness of the minimum channel, the target flatness control dead zone and the control dead zone under leveling.

[0060] It should be noted that the target flatness control deadband A represents the upper and lower limits of the target flatness control target for the strip width edge; the target flatness control deadband B during leveling represents the upper and lower limits of the target flatness control target for the strip width edge during leveling. Straightness can be expressed as the degree of difference in elongation at various points along the strip width or the maximum amplitude of the strip's transverse stress distribution. For example, in this application, the target flatness control deadband A can be between -50 (i-units) and 50 (i-units).

[0061] In a specific embodiment, Figure 3 As shown, based on the steel type, rolling speed, minimum channel and maximum channel, the target flatness of the minimum channel, the target flatness of the maximum channel, the control dead zone A of the target flatness and the control dead zone B under leveling are determined, which may include:

[0062] If the rolling speed is less than the preset rolling speed, the first target flatness is determined as the target flatness of the minimum channel and the target flatness of the maximum channel, and the first control dead zone is determined as the control dead zone A of the target flatness; if the rolling speed is greater than or equal to the preset rolling speed, the second target flatness is determined as the target flatness of the minimum channel and the target flatness of the maximum channel based on the steel type, and the second control dead zone is determined as the control dead zone A of the target flatness; based on the steel type, the control dead zone B under leveling is determined.

[0063] In a specific embodiment, the plate width edges of different steel grades can be given according to the steel grade, the minimum channel and the maximum channel, that is, the target flatness of the minimum channel and the target flatness of the maximum channel. The target flatness of the minimum channel and the target flatness of the maximum channel are both the second target flatness p (i-units), and based on the target flatness of the minimum channel and the target straightness of the maximum channel, the control dead zone A = second control dead zone q (i-units) of the target flatness of the plate width edge is obtained.

[0064] Obtain the rolling speed. When the rolling speed is less than the preset rolling speed, determine the target flatness of the minimum channel and the target flatness of the maximum channel = the first target flatness k (i-units), and based on the target flatness of the minimum channel and the target flatness of the maximum channel, obtain the control dead zone A = the first control dead zone o (i-units) of the target flatness of the wide edge of the plate.

[0065] When the rolling speed is ≥ the preset rolling speed, the flatness target of the above-mentioned steel grade is executed, that is, based on the steel grade, it is determined that the target flatness of the minimum channel and the target flatness of the maximum channel are both the second target flatness p (i-units), and based on the target flatness of the minimum channel and the target flatness of the maximum channel, the control dead zone A = second control dead zone q (i-units) of the target flatness of the plate width edge is obtained.

[0066] Based on the steel grade of the strip, the control dead zone B = r (i-units) under the target flatness leveling of the plate width edge can be obtained. Here, p, q, k, o, and r are process setting values ​​and are not limited in this application. The preset rolling speed can be set according to actual needs and is less than the unit design speed. For example, assuming the maximum design speed of the unit is 1500 meters per minute, the preset rolling speed b in this embodiment is 400 meters per minute.

[0067] Step S104: Obtain the actual flatness of the minimum channel and the actual flatness of the maximum channel of the flatness meter, and control the edge flatness of the strip based on the actual flatness of the minimum channel, the actual flatness of the maximum channel, the target flatness of the minimum channel, the target flatness of the maximum channel, the control dead zone A of the target flatness, and the control dead zone B under leveling.

[0068] In a specific embodiment, Figure 4 As shown, the actual flatness of the smallest channel and the actual flatness of the largest channel can be measured by the flatness meter installed in the equipment.

[0069] Based on the actual flatness of the minimum channel, the actual flatness of the maximum channel, the target flatness of the minimum channel, the target flatness of the maximum channel, the control dead zone A of the target flatness, and the control dead zone B under leveling, the edge shape of the strip is controlled, which may include:

[0070] Based on the actual flatness of the minimum channel and the target flatness of the minimum channel, the flatness deviation x of the working side of the strip is determined; based on the actual flatness of the maximum channel and the target flatness of the maximum channel, the flatness deviation y of the transmission side of the strip is determined; based on the working side flatness deviation x, the transmission side flatness deviation y, the control dead zone A of the target flatness and the control dead zone B under leveling, the edge flatness of the strip is controlled.

[0071] Specifically, the working side flatness deviation x = the actual straightness of the minimum channel - the target straightness of the minimum channel;

[0072] Transmission side flatness deviation y = actual flatness of the maximum channel - target flatness of the maximum channel.

[0073] Next, based on the working side flatness deviation x, the transmission side flatness deviation y, the control dead zone A of the target flatness, and the control dead zone B under leveling, the edge flatness of the strip is controlled. Specifically, the following steps may be performed:

[0074] If the absolute value of the working side flatness deviation x and the absolute value of the transmission side flatness deviation y are both less than or equal to the control dead zone A of the target flatness, the edge flatness is rolled normally;

[0075] If the absolute value of the working side plate shape deviation x and / or the absolute value of the transmission side plate shape deviation y is greater than the control dead zone A of the target flatness, and the absolute value of the difference between the working side plate shape deviation x and the transmission side plate shape deviation y |xy| is less than or equal to the control dead zone B under leveling, the edge plate shape is subjected to roller shifting control.

[0076] If the absolute value of the working side flatness deviation x and / or the absolute value of the transmission side flatness deviation y is greater than the control dead zone A of the target flatness, and the absolute value of the difference between the working side flatness deviation x and the transmission side flatness deviation y |xy| is greater than the control dead zone B under leveling, the edge flatness is leveled.

[0077] Among them, leveling control can mean: adjusting the horizontality of the edge plate shape, and roller shifting control can mean: adjusting the edge plate shape of the strip.

[0078] Specifically, when the absolute value of the working side plate shape deviation x and the absolute value of the transmission side plate shape deviation y are both less than or equal to the control dead zone A of the target flatness, it means that the deviation between the actual flatness measured by the plate shape meter and the target flatness meets the requirements, and therefore rolling is normal.

[0079] Among them, the roller shifting control of the edge plate shape includes: determining the roller shifting amount based on the working side plate shape deviation x, the transmission side plate shape deviation y and the preset roller shifting plate shape gain; and controlling the roller shifting of the edge plate shape based on the roller shifting amount.

[0080] Specifically, the amount of roller shifting = working side plate shape deviation x or transmission side plate shape deviation y / roller shifting plate shape gain, where the roller shifting plate shape gain can be obtained based on field tests, which represents the plate shape change corresponding to the change in the amount of roller shifting.

[0081] Leveling control of the edge plate shape may specifically include: determining the leveling amount based on the working side plate shape deviation x, the transmission side plate shape deviation y and the preset leveling plate shape gain; leveling control of the edge plate shape based on the leveling amount, so that the absolute value of the working side plate shape deviation x and / or the absolute value of the transmission side plate shape deviation y is less than or equal to the control dead zone B under leveling, and then performing roller shifting control.

[0082] Specifically, the leveling amount = the absolute value of the difference between the working side plate shape deviation x and the transmission side plate shape deviation y / 2 / leveling plate shape gain, where the leveling plate shape gain can be obtained based on field tests and represents the plate shape change corresponding to the leveling amount change.

[0083] The following is a specific example of controlling the edge shape mentioned above:

[0084] Assuming a rolling speed of 500 mpm, the target flatness control dead zone A is 3 (i-units), and the control dead zone B under leveling is r (i-units) = 4 (i-units);

[0085] Working side flatness deviation x = actual flatness of the minimum channel - target flatness of the minimum channel = 16 - 10 = 6I-Unit;

[0086] Transmission side flatness deviation y = actual straightness of the maximum channel - target straightness of the maximum channel = 22 - 10 = 12 (i-units);

[0087] The absolute value of the working side flatness deviation x (6 i-units) and the absolute value of the transmission side flatness deviation y (12 i-units) are both greater than the target flatness dead zone of 3 i-units at the wide edge of the plate;

[0088] Therefore, first perform leveling control. Leveling amount = difference between working side flatness deviation x and transmission side flatness deviation y / 2 / leveling gain = 6 (i-units) / 2 / (1.4 (i-units) / μm) = 2.1 μm. Adjust the transmission side pressure-up system by 2.1 μm (i.e., open the transmission side pressure-up system by 2.1 μm).

[0089] After leveling, the working side plate shape deviation x is equal to the transmission side plate shape deviation y:

[0090] Working side flatness deviation x = actual flatness of the minimum channel - target flatness of the minimum channel = 16 - 10 = 6 (i-units);

[0091] Transmission side flatness deviation y = actual flatness of the maximum effective channel - target flatness of the maximum channel = 16 - 10 = 6 (i-units);

[0092] The absolute value of the working side flatness deviation x6 (i-units) and the absolute value of the transmission side flatness deviation y6 (i-units) are both greater than the control dead zone 3 (i-units) of the target flatness;

[0093] The absolute value of the difference between the working side flatness deviation x and the transmission side flatness deviation y is 0 (i-units) less than the control dead zone 4 (i-units) under leveling;

[0094] Therefore, roller shifting control is performed, roller shifting amount = working side flatness deviation x or transmission side flatness deviation y / roller shifting flatness gain = 6 (i-units) / (0.8 (i-units) / mm) = 7.5 mm, and leveling control is not performed;

[0095] After the roller shifts,

[0096] Working side flatness deviation x = actual flatness of the minimum channel - target flatness of the minimum channel = 12 - 10 = 2 (i-units);

[0097] Transmission side flatness deviation y = actual straightness of the maximum channel - target straightness of the maximum channel = 11 - 10 = 1 (i-units);

[0098] The absolute value 2 (i-units) of the working side flatness deviation x and the absolute value 1 (i-units) of the transmission side flatness deviation y are both less than the control dead zone 3 (i-units) of the target flatness;

[0099] The absolute value of the difference between the working side flatness deviation x and the transmission side flatness deviation y (i-units) is less than the control dead zone (i-units) under leveling.

[0100] Therefore, rolling is normal.

[0101] In summary, a control method for the target plate shape of cold rolling provided by an embodiment of the present invention can obtain an effective channel for the edge of the strip according to the width of the strip, and obtain the target flatness of the plate edge according to the steel type and rolling speed of the strip, so as to flexibly adjust the rolling process to achieve the purpose of flexibly controlling the plate shape of the strip, so that the edge shape of the strip always meets the requirements of the target curve, improves the problem of the edge shape of the strip not meeting the requirements due to changes in strip parameters, realizes smooth and stable cold rolling, and improves the plate shape quality of the product.

[0102] In the second aspect, based on the same inventive concept, this embodiment provides a control device for the target cold rolling plate shape, such as Figure 5 Shown, including:

[0103] Parameter acquisition module 501, used to obtain the width, steel type and rolling speed of the strip;

[0104] A first determining module 502 is configured to determine a minimum channel and a maximum channel of a shape meter based on the width of the strip;

[0105] A second determination module 503 is configured to determine, based on the steel type, the rolling speed, the minimum channel, and the maximum channel, a target straightness of the minimum channel, a target straightness control dead zone, and a control dead zone under leveling;

[0106] The control module 504 is used to obtain the actual flatness of the minimum channel and the actual flatness of the maximum channel of the flatness meter, and control the edge flatness of the strip based on the actual flatness of the minimum channel, the actual flatness of the maximum channel, the target flatness of the minimum channel, the target flatness of the maximum channel, the control dead zone of the target flatness, and the control dead zone under leveling.

[0107] As an optional embodiment, the parameter acquisition module 501 is specifically used to: calculate the minimum channel number and the maximum channel number of the flatness meter based on the width of the strip; and determine the minimum channel and the maximum channel of the flatness meter based on the minimum channel number and the maximum channel number.

[0108] As an optional embodiment, the second determination module 503 is specifically used to: if the rolling speed is less than the preset rolling speed, determine the first target flatness as the target flatness of the minimum channel and the target flatness of the maximum channel, and determine the first control dead zone as the control dead zone of the target flatness; if the rolling speed is greater than or equal to the preset rolling speed, determine the second target flatness as the target flatness of the minimum channel and the target flatness of the maximum channel based on the steel grade, and determine the second control dead zone as the control dead zone of the target flatness; based on the steel grade, determine the control dead zone under the leveling.

[0109] As an optional embodiment, the control module 504 specifically includes:

[0110] A first determining submodule is configured to determine a flatness deviation of the working side of the strip based on an actual flatness of the minimum channel and a target flatness of the minimum channel;

[0111] A second determining submodule is configured to determine the flatness deviation of the strip steel transmission side based on the actual flatness of the maximum channel and the target flatness of the maximum channel;

[0112] The edge flatness control submodule is used to control the edge flatness of the strip based on the working side flatness deviation, the transmission side flatness deviation, the control dead zone of the target flatness, and the control dead zone under leveling.

[0113] As an optional embodiment, the edge shape control submodule is used to:

[0114] If the absolute value of the working side flatness deviation and the absolute value of the transmission side flatness deviation are both less than or equal to the control dead zone of the target flatness, the edge flatness is rolled normally;

[0115] If the absolute value of the working side flatness deviation and / or the absolute value of the transmission side flatness deviation is greater than the control dead zone of the target flatness, and the absolute value of the difference between the working side flatness deviation and the transmission side flatness deviation is less than or equal to the control dead zone under leveling, the edge flatness is subjected to roller shifting control;

[0116] If the absolute value of the working side plate shape deviation and / or the absolute value of the transmission side plate shape deviation is greater than the control dead zone of the target flatness, and the absolute value of the difference between the working side plate shape deviation and the transmission side plate shape deviation is greater than the control dead zone under leveling, the edge plate shape is leveled.

[0117] As an optional embodiment, the roller shifting control of the edge plate shape includes: determining the roller shifting amount based on the working side plate shape deviation, the transmission side plate shape deviation and the preset roller shifting plate shape gain; and performing the roller shifting control on the edge plate shape based on the roller shifting amount.

[0118] As an optional embodiment, the leveling control of the edge plate shape includes: determining the leveling amount based on the working side plate shape deviation, the transmission side plate shape deviation and a preset leveling plate shape gain; leveling control of the edge plate shape based on the leveling amount, so that the absolute value of the working side plate shape deviation and / or the absolute value of the transmission side plate shape deviation is less than or equal to the control dead zone under leveling, and then performing the roller shifting control.

[0119] The above modules can be implemented by software codes, in which case the above modules can be stored in the memory of the control device. The above modules can also be implemented by hardware such as integrated circuit chips.

[0120] An embodiment of the present invention provides a control device for the target cold-rolled plate shape, and its implementation principle and technical effects are the same as those of the aforementioned method embodiment. For the sake of brief description, for matters not mentioned in the device embodiment, reference may be made to the corresponding contents in the aforementioned method embodiment.

[0121] In a third aspect, based on the same inventive concept, this embodiment provides an electronic device 500, such as Figure 6 As shown, it includes: a memory 501, a processor 502 and a computer program 503 stored in the memory and capable of running on the processor. When the processor 501 executes the program, the steps of the control method of the cold-rolled target plate shape described in the first aspect are implemented.

[0122] 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.

[0123] 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 method for controlling a target cold rolling shape, characterized in that: include: Obtaining the width, steel grade, and rolling speed of the steel strip; Determining a minimum channel and a maximum channel of a shape meter based on the width of the strip; Determining, based on the steel grade, the rolling speed, the minimum channel, and the maximum channel, a target flatness of the minimum channel, a target flatness control dead zone, and a control dead zone under leveling; obtaining an actual flatness of a minimum channel and an actual flatness of a maximum channel of the shape meter, and controlling the flatness of an edge of the strip based on the actual flatness of the minimum channel, the actual flatness of the maximum channel, a target flatness of the minimum channel, the target flatness of the maximum channel, a control dead zone of the target flatness, and a control dead zone during leveling; The controlling of the edge flatness of the strip based on the actual flatness of the minimum channel, the actual flatness of the maximum channel, the target flatness of the minimum channel, the target flatness of the maximum channel, the control dead zone of the target flatness, and the control dead zone under leveling includes: determining the flatness deviation of the working side of the strip based on the actual flatness of the minimum channel and the target flatness of the minimum channel; determining the flatness deviation of the driving side of the strip based on the actual flatness of the maximum channel and the target flatness of the maximum channel; and controlling the edge flatness of the strip based on the working side flatness deviation, the driving side flatness deviation, the control dead zone of the target flatness, and the control dead zone under leveling; The controlling of the edge flatness of the strip based on the working side flatness deviation, the transmission side flatness deviation, the control dead zone of the target flatness, and the control dead zone under leveling includes: If the absolute value of the working side plate shape deviation and the absolute value of the transmission side plate shape deviation are both less than or equal to the control dead zone of the target flatness, the edge plate shape is rolled normally; if the absolute value of the working side plate shape deviation and / or the absolute value of the transmission side plate shape deviation is greater than the control dead zone of the target flatness, and the absolute value of the difference between the working side plate shape deviation and the transmission side plate shape deviation is less than or equal to the control dead zone under leveling, the edge plate shape is subjected to roller shifting control; if the absolute value of the working side plate shape deviation and / or the absolute value of the transmission side plate shape deviation is greater than the control dead zone of the target flatness, and the absolute value of the difference between the working side plate shape deviation and the transmission side plate shape deviation is greater than the control dead zone under leveling, the edge plate shape is subjected to leveling control.

2. The method according to claim 1, wherein Determining the minimum channel and the maximum channel of the shape meter based on the width of the strip steel includes: Calculating a minimum channel number and a maximum channel number of a shape meter based on the width of the strip; Based on the minimum channel number and the maximum channel number, the minimum channel and the maximum channel of the shape meter are determined.

3. The method according to claim 1, wherein The step of determining the target flatness of the minimum channel, the target flatness of the maximum channel, the control dead zone of the target flatness, and the control dead zone under leveling based on the steel grade, the rolling speed, the minimum channel, and the maximum channel comprises: If the rolling speed is less than a preset rolling speed, determining a first target flatness as the target flatness of the minimum channel and the target flatness of the maximum channel, and determining a first control dead zone as the control dead zone of the target flatness; If the rolling speed is greater than or equal to the preset rolling speed, determining a second target flatness as the target flatness of the minimum channel and the target flatness of the maximum channel based on the steel grade, and determining a second control dead zone as the control dead zone of the target flatness; Based on the steel type, a control dead zone under the leveling is determined.

4. The method according to claim 1, wherein The roller shifting control of the edge plate shape includes: Determining a roller shifting amount based on the working side flatness deviation, the transmission side flatness deviation, and a preset roller shifting flatness gain; The roll shifting control is performed on the edge shape based on the roll shifting amount.

5. The method according to claim 1, wherein The leveling control of the edge plate shape includes: Determining a leveling amount based on the working side flatness deviation, the transmission side flatness deviation, and a preset leveling gain; The edge plate shape is leveled based on the leveling amount so that the absolute value of the working side plate shape deviation and / or the absolute value of the transmission side plate shape deviation is less than or equal to the control dead zone under leveling, and then the roller shifting control is performed.

6. A control device for cold rolling target plate shape, characterized in that: include: A parameter acquisition module, used to obtain the width, steel type and rolling speed of the strip; A first determining module is configured to determine a minimum channel and a maximum channel of a shape meter based on the width of the strip; A second determination module is configured to determine, based on the steel type, the rolling speed, the minimum channel, and the maximum channel, a target straightness of the minimum channel, a target straightness of the maximum channel, a control dead zone of the target straightness, and a control dead zone under leveling; a control module, configured to obtain an actual flatness of a minimum channel and an actual flatness of a maximum channel of the shape meter, and control the flatness of an edge of the strip based on the actual flatness of the minimum channel, the actual flatness of the maximum channel, a target flatness of the minimum channel, the target flatness of the maximum channel, a control dead zone of the target flatness, and a control dead zone under leveling; The control module specifically includes: a first determination submodule, configured to determine the flatness deviation of the working side of the strip based on the actual flatness of the minimum channel and the target flatness of the minimum channel; a second determination submodule, configured to determine the flatness deviation of the driving side of the strip based on the actual flatness of the maximum channel and the target flatness of the maximum channel; and an edge flatness control submodule, configured to control the edge flatness of the strip based on the working side flatness deviation, the driving side flatness deviation, the control dead zone of the target flatness, and the control dead zone under leveling. The edge plate shape control submodule is used to: if the absolute value of the working side plate shape deviation and the absolute value of the transmission side plate shape deviation are both less than or equal to the control dead zone of the target flatness, then the edge plate shape is rolled normally; if the absolute value of the working side plate shape deviation and / or the absolute value of the transmission side plate shape deviation is greater than the control dead zone of the target flatness, and the absolute value of the difference between the working side plate shape deviation and the transmission side plate shape deviation is less than or equal to the control dead zone under leveling, then the edge plate shape is subjected to roller shifting control; if the absolute value of the working side plate shape deviation and / or the absolute value of the transmission side plate shape deviation is greater than the control dead zone of the target flatness, and the absolute value of the difference between the working side plate shape deviation and the transmission side plate shape deviation is greater than the control dead zone under leveling, then the edge plate shape is subjected to leveling control.

7. An electronic device, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the steps of the method according to any one of claims 1 to 5 are implemented when the processor executes the program.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the steps of the method according to any one of claims 1 to 5 are implemented.

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