Leveling control method, device and equipment for rolling mill

Abstract

The invention discloses a leveling control method, device and equipment for a rolling mill. The method comprises the steps that physical characteristic data of strip steel are obtained; determining a first group of rolling parameters of a first section of strip steel for flattening the strip steel based on the physical characteristic data of the strip steel; performing flattening treatment on the first section of strip steel based on the first group of rolling parameters, and obtaining the thinning amount of the first section of strip steel before and after flattening treatment; the first set of rolling parameters is adjusted based on the thinning amount to obtain a second set of rolling parameters of a second section of strip steel used for flattening the strip steel, and the second section of strip steel is adjacent to the first section of strip steel; and flattening the second section of strip steel based on the second group of rolling parameters. The technical problem that the flattening qualification rate of the strip steel is low is solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of metal processing, and particularly relates to a level control method, device and equipment for a rolling mill. Background Art

[0002] A rolling mill and a temper mill are equipment for realizing different rolling processes. The process objective of the rolling mill is mainly to change the thickness of the strip steel, causing large plastic deformation of the material to achieve the required shape and size; the process objective of the temper mill is mainly to obtain a certain elongation rate, causing small plastic deformation of the material to improve the surface quality and performance of the strip steel and enhance the flatness and smoothness of the material.

[0003] During the enterprise production process, there is a need to transform a rolling mill into a temper mill to realize the leveling function of the rolling mill. However, there are many differences in equipment, process, electricity, etc. During the leveling process of the rolling mill, problems such as poor strip shape, warping, abnormal mechanical properties, low flatness and low smoothness often occur, resulting in a low leveling qualification rate of the strip steel. Summary of the Invention

[0004] Embodiments of the present invention provide a level control method, device and equipment for a rolling mill, which solve the technical problem of low leveling qualification rate of strip steel.

[0005] In a first aspect, embodiments of the present invention provide a level control method for a rolling mill, including: obtaining physical property data of a strip steel; determining a first set of rolling parameters for a first section of the strip steel to be leveled based on the physical property data of the strip steel; performing a leveling process on the first section of the strip steel based on the first set of rolling parameters, and obtaining the thickness reduction amount of the first section of the strip steel before and after the leveling process; adjusting the first set of rolling parameters based on the thickness reduction amount to obtain a second set of rolling parameters for a second section of the strip steel to be leveled, where the second section of the strip steel is an adjacent strip of the first section of the strip steel; performing a leveling process on the second section of the strip steel based on the second set of rolling parameters.

[0006] In combination with the first aspect of the present invention, in some embodiments, the physical property data of the strip steel includes the material, thickness and width of the strip steel; the determining a first set of rolling parameters for a first section of the strip steel to be leveled based on the physical property data of the strip steel includes: determining a third set of rolling parameters for a first section of the strip steel to be leveled based on the material of the strip steel; correcting the third set of rolling parameters based on the thickness and width of the strip steel to obtain the first set of rolling parameters.

[0007] In connection with the first aspect of the present invention, in some embodiments, the first set of rolling parameters includes rolling force, front tension, and back tension; wherein, the smaller the hardness, thickness, and width of the strip material, the smaller the rolling force, the front tension, and the back tension.

[0008] In connection with the first aspect of the present invention, in some embodiments, if the strip material is spcc, the thickness is 1.5 mm, and the width is 1150 mm, then the rolling force is 1200 kn, the front tension is 40 kn, and the back tension is 80 kn; if the strip material is spcc, the thickness is 2.0 mm, and the width is 1250 mm, then the rolling force is 1300 kn, the front tension is 50 kn, and the back tension is 80 kn; if the strip material is spcc, the thickness is 2.5 mm, and the width is 1300 mm, then the rolling force is 1400 kn, the front tension is 60 kn, and the back tension is 80 kn.

[0009] In connection with the first aspect of the present invention, in some embodiments, the first set of rolling parameters includes the intermediate roll bending force, the work roll bending force, and the intermediate roll shifting amount of the rolling mill; wherein, if the strip material is spcc, the thickness is 1.5 mm, and the width is 1150 mm, then the intermediate roll bending force is 100 kn, the work roll bending force is 50 kn, and the intermediate roll shifting amount is 30 mm; if the strip material is spcc, the thickness is 2.0 mm, and the width is 1250 mm, then the intermediate roll bending force is 110 kn, the work roll bending force is 100 kn, and the intermediate roll shifting amount is 40 mm; if the strip material is spcc, the thickness is 2.5 mm, and the width is 1300 mm, then the intermediate roll bending force is 120 kn, the work roll bending force is 110 kn, and the intermediate roll shifting amount is 40 mm.

[0010] In connection with the first aspect of the present invention, in some embodiments, adjusting the first set of rolling parameters based on the amount of thickness reduction to obtain a second set of rolling parameters for leveling the second section of the strip includes: if the amount of thickness reduction is greater than a preset first thickness reduction threshold, reducing the rolling force in the first set of rolling parameters to obtain the rolling force in the second set of rolling parameters; if the amount of thickness reduction is less than a preset second thickness reduction threshold, increasing the rolling force in the first set of rolling parameters to obtain the rolling force in the second set of rolling parameters, and the first thickness reduction threshold is greater than the second thickness reduction threshold.

[0011] In connection with the first aspect of the present invention, in some embodiments, the rolling mill is a single-stand rolling mill, and an entry straightener is provided at the entry of the single-stand rolling mill; the method further includes: during the uncoiling process, depressing the entry straightener.

[0012] In connection with the first aspect of the present invention, in some embodiments, if the material of the strip is spcc, the thickness is 1.5 mm, and the width is 1150 mm, then the coiling method of the strip is downcoiling; if the material of the strip is spcc, the thickness is 2.0 mm, and the width is 1250 mm, then the coiling method of the strip is downcoiling; if the material of the strip is spcc, the thickness is 2.5 mm, and the width is 1300 mm, then the coiling method of the strip is upcoiling.

[0013] In a second aspect, an embodiment of the present invention provides a level control device for a rolling mill, including: a characteristic acquisition unit for acquiring physical characteristic data of a strip; a parameter determination unit for determining a first set of rolling parameters for leveling a first section of the strip based on the physical characteristic data of the strip; a first leveling unit for leveling the first section of the strip based on the first set of rolling parameters and acquiring the thickness reduction amount of the first section of the strip before and after leveling; an adjustment unit for adjusting the first set of rolling parameters based on the thickness reduction amount to obtain a second set of rolling parameters for leveling a second section of the strip, where the second section of the strip is an adjacent strip of the first section of the strip; and a second leveling unit for leveling the second section of the strip based on the second set of rolling parameters.

[0014] In a third aspect, an embodiment of the present invention provides an electronic device, including: a memory, a processor, and a computer program stored on the memory and executable on the processor, where the processor implements the method according to any one of the first aspect when executing the computer program.

[0015] One or more technical solutions provided by the embodiments of the present invention at least achieve the following technical effects or advantages:

[0016] In an embodiment of the present invention, physical property data of a strip steel is obtained; based on the physical property data of the strip steel, a first set of rolling parameters for temper rolling the first section of the strip steel is determined; the first section of the strip steel is temper rolled based on the first set of rolling parameters, and the thickness reduction amount of the first section of the strip steel before and after temper rolling is obtained; the first set of rolling parameters is adjusted based on the thickness reduction amount to obtain a second set of rolling parameters for temper rolling the second section of the strip steel, where the second section of the strip steel is an adjacent strip of the first section of the strip steel; the second section of the strip steel is temper rolled based on the second set of rolling parameters. Determining the first set of rolling parameters for the first section of the strip steel based on the physical property data of the strip steel, that is, matching the rolling parameters according to the actual situation of the strip steel, can avoid strip shape defects and warping of the strip steel to a certain extent. Further, adjusting the first set of rolling parameters based on the thickness reduction amount of the first section of the strip steel before and after temper rolling to obtain the second set of rolling parameters for the second section of the strip steel can avoid the thickness reduction amount of the strip steel after temper rolling being too large or too small, thus avoiding strip shape defects and improving the mechanical properties of the strip steel after temper rolling. Therefore, the temper rolling qualification rate of the strip steel is improved. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for description in the embodiments. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 It is a flowchart of the temper rolling control method of the rolling mill in the embodiment of the present invention;

[0019] Figure 2 It is a functional module diagram of the temper rolling control device of the rolling mill in the embodiment of the present invention;

[0020] Figure 3 It is a schematic structural diagram of an electronic device in the embodiment of the present invention. Detailed Embodiments

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0022] In the present invention, descriptions such as "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first", "second" may explicitly or implicitly include at least one such feature. Additionally, the technical solutions between various embodiments may be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or is unable to be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0023] An embodiment of the present invention provides a level control method for a rolling mill. Referring to Figure 1 as shown, the method includes the following steps S101 to S105:

[0024] S101: Obtain the physical property data of the strip steel.

[0025] S102: Based on the physical property data of the strip steel, determine the first set of rolling parameters for the first section of the strip steel to be leveled.

[0026] In some embodiments, the physical property data of the strip steel includes the material, thickness, and width of the strip steel; based on the physical property data of the strip steel, determining the first set of rolling parameters for the first section of the strip steel to be leveled may include: based on the material of the strip steel, determining the third set of rolling parameters for the first section of the strip steel to be leveled; and based on the thickness and width of the strip steel, correcting the third set of rolling parameters to obtain the first set of rolling parameters.

[0027] In some embodiments, the first set of rolling parameters includes rolling force, front tension, and rear tension; among them, the smaller the hardness, thickness, and width of the material of the strip steel, the smaller the rolling force, front tension, and rear tension.

[0028] It should be noted that the smaller the hardness, thickness, and width of the material of the strip steel, the easier it is for the strip steel to deform, and the greater the reduction amount of the strip steel under the same rolling force. Excessive reduction amount may lead to poor thickness uniformity of the strip steel, possibly causing a decrease in mechanical properties such as strength and toughness in local areas. If the reduction amount is too small, it may not be possible to achieve an ideal surface roughness of the strip steel. Therefore, the embodiment of the present invention determines the rolling force according to the hardness, thickness, and width of the material of the strip steel, which can avoid excessive or too small reduction amount of the strip steel, thus avoiding the decrease in mechanical properties caused by excessive reduction amount and also avoiding the inability to achieve an ideal surface roughness of the strip steel due to too small reduction amount, so the leveling qualification rate of the strip steel is improved.

[0029] It should also be noted that there may be residual stress in the flattened strip steel. If the tension of the strip steel is too small, it may cause the tension to be unable to offset the residual stress of the strip steel, thereby resulting in poor strip steel shape. If the tension of the strip steel is too large, then after the tension offsets the residual stress of the strip steel, the remaining tension may cause the strip steel to deform further, which will also result in poor strip steel shape. Also, due to the residual stress of the strip steel, it is closely related to the hardness, thickness, and width of the strip steel material. Among them, the smaller the hardness, thickness, and width of the strip steel material, the smaller the residual stress of the strip steel theoretically, and then the smaller the tension required to maintain the strip steel shape. Therefore, the embodiments of the present invention define that the tension is determined based on the hardness, thickness, and width of the strip steel material, so that the tension can exactly offset the residual stress of the strip steel, avoiding excessive or too small tension, and thus avoiding poor strip steel shape, so the flattening qualification rate of the strip steel is improved.

[0030] In some embodiments, if the strip steel material is SPCC, the thickness is 1.5 mm, and the width is 1150 mm, then the rolling force is 1200 kn, the front tension is 40 kn, and the rear tension is 80 kn; if the strip steel material is SPCC, the thickness is 2.0 mm, and the width is 1250 mm, then the rolling force is 1300 kn, the front tension is 50 kn, and the rear tension is 80 kn; if the strip steel material is SPCC, the thickness is 2.5 mm, and the width is 1300 mm, then the rolling force is 1400 kn, the front tension is 60 kn, and the rear tension is 80 kn.

[0031] It should be noted that SPCC was originally the steel name of "Cold Rolled Carbon Steel Sheets and Strips for General Use" in the Japanese standard (JIS).

[0032] In some embodiments, the first set of rolling parameters includes the intermediate roll bending force, the work roll bending force, and the intermediate roll shifting amount of the rolling mill; among them, if the strip steel material is SPCC, the thickness is 1.5 mm, and the width is 1150 mm, then the intermediate roll bending force is 100 kn, the work roll bending force is 50 kn, and the intermediate roll shifting amount is 30 mm; if the strip steel material is SPCC, the thickness is 2.0 mm, and the width is 1250 mm, then the intermediate roll bending force is 110 kn, the work roll bending force is 100 kn, and the intermediate roll shifting amount is 40 mm; if the strip steel material is SPCC, the thickness is 2.5 mm, and the width is 1300 mm, then the intermediate roll bending force is 120 kn, the work roll bending force is 110 kn, and the intermediate roll shifting amount is 40 mm.

[0033] It should be noted that during the temper rolling process of the rolling mill, the intermediate roll bending force, the work roll bending force, and the intermediate roll shifting amount of the rolling mill have a great influence on the strip shape. The above data are obtained by experiments and data analysis and optimizing the process parameters. Under the conditions of the hardness, thickness, and width of the specific strip material, the intermediate roll bending force, the work roll bending force, and the intermediate roll shifting amount of the above rolling mill can avoid poor strip shape.

[0034] S103: Temper the first section of the strip based on the first set of rolling parameters, and obtain the thickness reduction amount of the first section of the strip before and after tempering.

[0035] S104: Adjust the first set of rolling parameters based on the thickness reduction amount to obtain the second set of rolling parameters for tempering the second section of the strip, and the second section of the strip is the adjacent strip of the first section of the strip.

[0036] In some embodiments, adjusting the first set of rolling parameters based on the thickness reduction amount to obtain the second set of rolling parameters for tempering the second section of the strip may include: if the thickness reduction amount is greater than a preset first thickness reduction threshold, reduce the rolling force in the first set of rolling parameters to obtain the rolling force in the second set of rolling parameters; if the thickness reduction amount is less than a preset second thickness reduction threshold, increase the rolling force in the first set of rolling parameters to obtain the rolling force in the second set of rolling parameters, and the first thickness reduction threshold is greater than the second thickness reduction threshold.

[0037] It should be noted that the thickness reduction amount being greater than the preset first thickness reduction threshold indicates that the thickness reduction amount is too large. An excessive thickness reduction amount will cause the thickness uniformity of the strip to deteriorate, which may lead to a decrease in mechanical properties such as strength and toughness in local areas, thereby reducing the tempering qualification rate of the strip. The thickness reduction amount being less than the preset second thickness reduction threshold indicates that the thickness reduction amount is too small. A too small thickness reduction amount may not be able to make the surface roughness of the strip reach the ideal state. Therefore, in the embodiments of the present invention, by adjusting the rolling force, the thickness reduction amount of the strip is made to be within a reasonable range, avoiding a decrease in mechanical properties due to an excessive thickness reduction amount, and also avoiding the surface roughness of the strip not reaching the ideal state due to a too small thickness reduction amount, so the tempering qualification rate of the strip is improved.

[0038] S105: Temper the second section of the strip based on the second set of rolling parameters.

[0039] In some embodiments, the rolling mill is a single-stand rolling mill, and an entry straightener is provided at the entry of the single-stand rolling mill; the method may further include: during the uncoiling process, lower the entry straightener.

[0040] It should be noted that lowering the entry straightener means that the entry straightener is in a working state and provides back tension for the strip.

[0041] It should be noted that a detailed assessment of the original rolling mill is required to determine the components that need to be upgraded, such as replacing suitable rolling rolls, changing the tension control system, etc., to ensure that the modified equipment can meet the requirements of the tempering process. For the deviation problem that occurs during the tempering of thick-gauge strips, the entry straightener can be replaced, and the straightener is pressed down during the uncoiling process to provide back tension for the strip. The tension is increased by about 10% compared to the original, avoiding the strip deviation accident.

[0042] In some embodiments, if the material of the strip is spcc, the thickness is 1.5 mm, and the width is 1150 mm, the coiling method of the strip is down coiling; if the material of the strip is spcc, the thickness is 2.0 mm, and the width is 1250 mm, the coiling method of the strip is down coiling; if the material of the strip is spcc, the thickness is 2.5 mm, and the width is 1300 mm, the coiling method of the strip is up coiling.

[0043] It should be noted that converting a rolling mill into a tempering mill is a complex project involving many factors. Especially, there are many differences in equipment, process, electricity, etc., so there are many difficulties in converting a rolling mill into a tempering mill. There may be incompatibility problems between the original rolling mill equipment and the requirements of the new tempering process, such as rolling rolls, rolling force, tension control system, etc. The tempering process involves multiple parameters, such as rolling force, tension, reduction, etc. The optimization of these parameters is crucial for the tempering effect. The tempered strip may have residual stress, resulting in poor strip shape and warping. The embodiment of the present invention can convert a single-stand rolling mill into a tempering mill, with slight modifications to the existing equipment and electrical programs, to achieve the tempering function at the lowest cost. The rolling mill equipment is modified to provide the entry tension of the rolling mill through the entry straightener to avoid strip deviation. The strip shape control solves the middle wave problem.

[0044] It should be noted that when the rolling mill is converted into a temper mill, the limit of the original equipment can be adjusted, for example, from the maximum thickness of 2.5 mm to 6.0 mm. The temper mill control mode is added. During the production process, constant rolling force is used, the maximum value of the inlet tension is used, and the secondary set value of the outlet tension is used. The bending roll and the shifting roll adopt the control strategy of micro-edge wave. In terms of instrumentation, the thickness gauge provides thickness monitoring function, and the shape roll displays the real-time shape to achieve automatic shape control. In terms of technology, the tempering process involves multiple parameters such as rolling force, tension, reduction, etc. The optimization of these parameters is crucial for the tempering effect. Through experiments and data analysis, the tempering process parameters are optimized. For example, according to the material, thickness and width of the strip steel, the rolling force and tension are adjusted to obtain the best tempering effect. Explore the thinning situation of the strip steel, determine the optimal rolling force, avoid product non-conformance caused by strip steel thinning, and finally determine that the rolling force can be 2000 kn to 3000 kn. The thinning amount of the strip steel can be controlled within 20 - 50 μm. When the thickness deviation is found, the rolling force is adjusted in time. For the strip steel after tempering, there may be residual stress, resulting in poor strip shape. Scientifically set the tension of the temper mill to reduce the residual stress of the strip steel. At the same time, optimize the setting values of the bending roll and the shifting roll of the temper mill. The bending roll force can be -100 kn to 200 kn, and the shifting roll amount can be 0 - 20 mm. On the basis of ensuring the tempering elongation and shape, reduce the tension and bending roll force of the tempering section as much as possible to solve the strip shape problem of the strip steel.

[0045] It should be noted that the deflector roll plays a role in guiding the strip steel path during the tempering process. When the rotation angle of the deflector roll is too large, the strip steel will be subjected to greater bending stress when passing through. If this bending stress exceeds the yield strength of the strip steel, the strip steel will undergo plastic deformation, resulting in warping at the outlet. Strip steels with different materials and thicknesses have different bearing capacities for bending stress. Thinner or softer strip steels are more likely to undergo plastic deformation. Therefore, when selecting the rotation angle of the deflector roll, it is necessary to consider the material and thickness of the strip steel to ensure that it will not undergo plastic deformation due to excessive bending stress. Through professional analysis and judgment, the coiling method can be changed from bottom coiling to top coiling, which changes the stress state of the strip steel during coiling. In the top coiling method, the strip steel is subjected to an upward pulling force during coiling, which helps to offset the downward bending stress generated by the too large rotation angle of the deflector roll, thereby reducing the plastic deformation and warping of the strip steel. During the electrical transformation, the electrical control system may also be optimized to better control the tension and speed during the coiling process. By precisely controlling the tension and speed, the warping and other quality problems of the strip steel can be further reduced.

[0046] It should be noted that the cost of converting the rolling mill into a temper mill is approximately 2 - 5 million according to the current market price. The on-site personnel utilized the existing equipment and electrical control system to achieve the conversion of the rolling mill into a temper mill, and the transformation effect is good, which can save the company more than 2 million in costs.

[0047] In an embodiment of the present invention, physical property data of a strip steel is obtained; based on the physical property data of the strip steel, a first set of rolling parameters for the first section of the strip steel to be leveled is determined; the first section of the strip steel is leveled based on the first set of rolling parameters, and the amount of thickness reduction of the first section of the strip steel before and after the leveling process is obtained; the first set of rolling parameters is adjusted based on the amount of thickness reduction to obtain a second set of rolling parameters for the second section of the strip steel to be leveled, where the second section of the strip steel is an adjacent strip steel to the first section of the strip steel; the second section of the strip steel is leveled based on the second set of rolling parameters. By determining the first set of rolling parameters for the first section of the strip steel based on the physical property data of the strip steel, that is, matching the rolling parameters according to the actual situation of the strip steel, it can, to a certain extent, avoid poor strip shape and warping of the strip steel. Further, by adjusting the first set of rolling parameters based on the amount of thickness reduction of the first section of the strip steel before and after the leveling process to obtain the second set of rolling parameters for the second section of the strip steel, it can avoid the excessive or too small amount of thickness reduction of the strip steel after leveling, thus avoiding poor strip shape and improving the mechanical properties of the strip steel after leveling. Therefore, the leveling qualification rate of the strip steel is improved.

[0048] Based on the same inventive concept, referring to Figure 2 As shown, an embodiment of the present invention provides a leveling control device 10 for a rolling mill, including: a characteristic acquisition unit 110 for acquiring physical property data of a strip steel; a parameter determination unit 120 for determining a first set of rolling parameters for the first section of the strip steel to be leveled based on the physical property data of the strip steel; a first leveling unit 130 for leveling the first section of the strip steel based on the first set of rolling parameters and acquiring the amount of thickness reduction of the first section of the strip steel before and after the leveling process; an adjustment unit 140 for adjusting the first set of rolling parameters based on the amount of thickness reduction to obtain a second set of rolling parameters for the second section of the strip steel to be leveled, where the second section of the strip steel is an adjacent strip steel to the first section of the strip steel; a second leveling unit 150 for leveling the second section of the strip steel based on the second set of rolling parameters.

[0049] It can be understood that the physical property data of the strip steel includes the material, thickness, and width of the strip steel; the parameter determination unit 120 is specifically configured to: determine a third set of rolling parameters for the first section of the strip steel to be leveled based on the material of the strip steel; and correct the third set of rolling parameters based on the thickness and width of the strip steel to obtain the first set of rolling parameters.

[0050] It can be understood that the first set of rolling parameters includes rolling force, front tension and back tension; among them, the smaller the hardness, thickness and width of the strip material, the smaller the rolling force, front tension and back tension. Among them, if the strip material is spcc, the thickness is 1.5 mm and the width is 1150 mm, the rolling force is 1200 kn, the front tension is 40 kn and the back tension is 80 kn; if the strip material is spcc, the thickness is 2.0 mm and the width is 1250 mm, the rolling force is 1300 kn, the front tension is 50 kn and the back tension is 80 kn; if the strip material is spcc, the thickness is 2.5 mm and the width is 1300 mm, the rolling force is 1400 kn, the front tension is 60 kn and the back tension is 80 kn.

[0051] It can be understood that the first set of rolling parameters includes the intermediate roll bending force, work roll bending force and intermediate roll shifting amount of the rolling mill; among them, if the strip material is spcc, the thickness is 1.5 mm and the width is 1150 mm, the intermediate roll bending force is 100 kn, the work roll bending force is 50 kn and the intermediate roll shifting amount is 30 mm; if the strip material is spcc, the thickness is 2.0 mm and the width is 1250 mm, the intermediate roll bending force is 110 kn, the work roll bending force is 100 kn and the intermediate roll shifting amount is 40 mm; if the strip material is spcc, the thickness is 2.5 mm and the width is 1300 mm, the intermediate roll bending force is 120 kn, the work roll bending force is 110 kn and the intermediate roll shifting amount is 40 mm.

[0052] It can be understood that the adjustment unit 140 is specifically used for: if the reduction amount is greater than the preset first reduction amount threshold, reducing the rolling force in the first set of rolling parameters to obtain the rolling force in the second set of rolling parameters; if the reduction amount is less than the preset second reduction amount threshold, increasing the rolling force in the first set of rolling parameters to obtain the rolling force in the second set of rolling parameters, and the first reduction amount threshold is greater than the second reduction amount threshold.

[0053] It can be understood that the rolling mill is a single-stand rolling mill, and an entry straightener is provided at the entry of the single-stand rolling mill; the leveler control device 10 of the rolling mill further includes: a roll-down unit for rolling down the entry straightener during the uncoiling process.

[0054] It can be understood that if the strip material is spcc, the thickness is 1.5 mm and the width is 1150 mm, the coiling method of the strip is down-coiling; if the strip material is spcc, the thickness is 2.0 mm and the width is 1250 mm, the coiling method of the strip is down-coiling; if the strip material is spcc, the thickness is 2.5 mm and the width is 1300 mm, the coiling method of the strip is up-coiling.

[0055] It should be understood that for more implementation details of the level control device 10 of the rolling mill in the embodiments of the present invention, reference is made to the aforementioned level control method of the rolling mill. For the sake of simplicity of the specification, it will not be elaborated herein.

[0056] Based on the same inventive concept, an embodiment of the present invention further provides an electronic device, as Figure 3 shown, including a memory 304, a processor 302, and a computer program stored on the memory 304 and executable on the processor 302. The processor 302 executes the program to implement the steps described in any implementation manner of the embodiment of the level control method of the rolling mill.

[0057] Among them, in Figure 3 , the bus architecture (represented by the bus 300), the bus 300 may include any number of interconnected buses and bridges. The bus 300 links various circuits including one or more processors represented by the processor 302 and the memory represented by the memory 304 together. The bus 300 may also link various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art. Therefore, they will not be further described herein. The bus interface 305 provides an interface between the bus 300 and the receiver 301 and the transmitter 303. The receiver 301 and the transmitter 303 may be the same element, that is, a transceiver, which provides a unit for communicating with various other devices on the transmission medium. The processor 302 is responsible for managing the bus 300 and general processing, while the memory 304 may be used to store data used by the processor 302 when performing operations.

[0058] The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on a computer-readable medium or transmitted via a computer-readable medium as one or more instructions or codes. Other examples and implementations are within the scope and spirit of the present invention and the appended claims. For example, due to the nature of software, the functions described above may be implemented using software executed by a processor, hardware, firmware, hardwiring, or any combination of these. In addition, each functional unit may be integrated in one processing unit, or each unit may exist physically alone, or two or more units may be integrated in one unit.

[0059] In several embodiments provided by this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are merely illustrative. For example, the division of the units can be a logical function division. In actual implementation, there can be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed coupling or direct coupling or communication connection to each other can be through some interfaces. The indirect coupling or communication connection of units or modules can be in an electrical or other form.

[0060] The units described as separate components may or may not be physically separated. The components serving as control devices may or may not be physical units, that is, they can be located in one place or distributed to multiple units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0061] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: various media such as USB flash drives, read-only memories (ROMs), random access memories (RAMs), mobile hard disks, magnetic disks, or optical discs that can store program codes.

[0062] The above are only the embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the scope of the claims of the present invention.

Claims

1. A rolling mill leveling control method, characterized in that: include: Obtain physical property data of the strip; Determining a first set of rolling parameters for flattening a first section of the steel strip based on the physical property data of the steel strip; performing a leveling process on the first section of steel strip based on the first set of rolling parameters, and obtaining a thinning amount of the first section of steel strip before and after the leveling process; adjusting the first set of rolling parameters based on the thinning amount to obtain a second set of rolling parameters for leveling a second section of the strip, the second section of the strip being an adjacent strip to the first section of the strip; Based on the second set of rolling parameters, the second section of the steel strip is leveled.

2. The rolling mill leveling control method according to claim 1, characterized in that: The physical property data of the steel strip includes the material, thickness and width of the steel strip; and determining a first set of rolling parameters for leveling a first section of the steel strip based on the physical property data of the steel strip includes: Based on the material of the steel strip, determining a third set of rolling parameters for leveling a first section of the steel strip; Based on the thickness and width of the steel strip, the third set of rolling parameters is modified to obtain the first set of rolling parameters.

3. The rolling mill leveling control method according to claim 2, characterized in that: The first set of rolling parameters includes rolling force, front tension and back tension; wherein, the smaller the hardness, thickness and width of the material of the strip steel are, the smaller the rolling force, the front tension and the back tension are.

4. The rolling mill leveling control method according to claim 3, characterized in that: If the strip is made of spcc, has a thickness of 1.5 mm and a width of 1150 mm, the rolling force is 1200 kn, the front tension is 40 kn and the rear tension is 80 kn; If the strip is made of spcc, has a thickness of 2.0 mm and a width of 1250 mm, the rolling force is 1300 kn, the front tension is 50 kn and the rear tension is 80 kn; If the strip is made of spcc, has a thickness of 2.5 mm and a width of 1300 mm, the rolling force is 1400 kn, the front tension is 60 kn and the rear tension is 80 kn.

5. The rolling mill leveling control method according to claim 2, characterized in that: The first set of rolling parameters includes the intermediate roll bending force, working roll bending force and intermediate roll shifting amount of the rolling mill; wherein, if the material of the strip is spcc, the thickness is 1.5mm and the width is 1150mm, the intermediate roll bending force is 100kn, the working roll bending force is 50kn and the intermediate roll shifting amount is 30mm; if the material of the strip is spcc, the thickness is 2.0mm and the width is 1250mm, the intermediate roll bending force is 110kn, the working roll bending force is 100kn and the intermediate roll shifting amount is 40mm; if the material of the strip is spcc, the thickness is 2.5mm and the width is 1300mm, the intermediate roll bending force is 120kn, the working roll bending force is 110kn and the intermediate roll shifting amount is 40mm.

6. The rolling mill leveling control method according to claim 1, characterized in that: The adjusting the first set of rolling parameters based on the thinning amount to obtain a second set of rolling parameters for leveling a second section of the strip steel comprises: If the thinning amount is greater than a preset first thinning amount threshold, reducing the rolling force in the first set of rolling parameters to obtain the rolling force in the second set of rolling parameters; If the thinning amount is less than a preset second thinning amount threshold, the rolling force in the first set of rolling parameters is increased to obtain the rolling force in the second set of rolling parameters, and the first thinning amount threshold is greater than the second thinning amount threshold.

7. The rolling mill leveling control method according to claim 1, characterized in that: The rolling mill is a single-stand rolling mill, and an inlet straightening machine is provided at the inlet of the single-stand rolling mill; the method further comprises: During the unwinding process, the inlet straightening machine is pressed down.

8. The rolling mill leveling control method according to any one of claims 1 to 7, characterized in that: If the material of the strip is spcc, the thickness is 1.5 mm and the width is 1150 mm, the coiling mode of the strip is bottom coiling; If the material of the strip is spcc, the thickness is 2.0 mm and the width is 1250 mm, the coiling mode of the strip is bottom coiling; If the material of the strip steel is spcc, the thickness is 2.5 mm and the width is 1300 mm, the coiling method of the strip steel is upper coiling.

9. A rolling mill flatness control device, characterized in that: include: A property acquisition unit, used for acquiring physical property data of the strip; a parameter determination unit, configured to determine a first set of rolling parameters for leveling a first section of the steel strip based on the physical property data of the steel strip; A first flattening unit, configured to flatten the first section of the steel strip based on the first set of rolling parameters, and obtain the thinning amount of the first section of the steel strip before and after the flattening; an adjusting unit, configured to adjust the first set of rolling parameters based on the thinning amount to obtain a second set of rolling parameters for leveling a second section of the strip, the second section of the strip being an adjacent strip to the first section of the strip; The second flattening unit is used to flatten the second section of the strip based on the second set of rolling parameters.

10. 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 processor implements the method according to any one of claims 1 to 8 when executing the computer program.

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