CN117380753A - Control method and device for head thickness deviation of hot continuous rolling strip steel and electronic equipment - Google Patents

Control method and device for head thickness deviation of hot continuous rolling strip steel and electronic equipment Download PDF

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Publication number
CN117380753A
CN117380753A CN202311297167.4A CN202311297167A CN117380753A CN 117380753 A CN117380753 A CN 117380753A CN 202311297167 A CN202311297167 A CN 202311297167A CN 117380753 A CN117380753 A CN 117380753A
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China
Prior art keywords
strip steel
rolling force
current strip
value
head thickness
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Pending
Application number
CN202311297167.4A
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Chinese (zh)
Inventor
艾矫健
王文广
徐芳
李东宁
杨孝鹤
史金芳
李兴波
王元嵩
吴秀鹏
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Shougang Jingtang United Iron and Steel Co Ltd
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Shougang Jingtang United Iron and Steel Co Ltd
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Priority to CN202311297167.4A priority Critical patent/CN117380753A/en
Publication of CN117380753A publication Critical patent/CN117380753A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/72—Rear end control; Front end control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • B21B1/24—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process
    • B21B1/26—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process by hot-rolling, e.g. Steckel hot mill
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/16—Control of thickness, width, diameter or other transverse dimensions
    • B21B37/165—Control of thickness, width, diameter or other transverse dimensions responsive mainly to the measured thickness of the product
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
    • B21B38/04—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring thickness, width, diameter or other transverse dimensions of the product
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
    • B21B38/08—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring roll-force
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Metal Rolling (AREA)

Abstract

The application relates to the technical field of steel rolling, and discloses a control method, a device and electronic equipment for thickness deviation of a head of hot continuous rolling strip steel. The method comprises the following steps: acquiring an actual head thickness value of a current strip steel and a target head thickness value of the current strip steel in a rolling process of a hot continuous rolling unit; determining a head thickness deviation value of the current strip steel according to the actual head thickness value and the target head thickness value; acquiring the actual rolling force of the current strip steel and the calculated rolling force of the current strip steel; determining the rolling force deviation value of the current strip steel according to the actual rolling force and the calculated rolling force; and determining the target set rolling force of the next strip steel of the current strip steel according to the head thickness deviation value and the rolling force deviation value. The technical scheme provided by the application can effectively improve the problem of deviation of the thickness of the head part of the strip steel caused by the deviation of the rolling force setting calculation, reduce the occurrence rate of thickness out-of-tolerance and improve the thickness control precision and the yield of products.

Description

Control method and device for head thickness deviation of hot continuous rolling strip steel and electronic equipment
Technical Field
The application relates to the technical field of steel rolling, and discloses a control method, a device and electronic equipment for thickness deviation of a head of hot continuous rolling strip steel.
Background
The AGC technology of hot continuous rolling configuration is the most effective means for controlling the thickness of the strip steel, and has extremely high control precision. But AGC control must be controlled after the gauge detects the actual thickness of the strip, since the finishing train end stand is a distance from the gauge. Therefore, AGC control does not control the thickness of the strip in a certain range of the strip head, and the strip thickness control level in this part is determined by the initial setting accuracy of the rolling mill roll gap. The setting accuracy of the roll gap of the rolling mill is mainly determined by the setting accuracy of the rolling force. Because the process factors influencing the rolling force are numerous, and many process factors are continuously changed in the production process, and some process factor changes are not monitored, the unavoidable deviation of the rolling force setting is caused, and finally, the deviation of the thickness of the head part of the strip steel from the target value is caused.
However, the existing hot continuous rolling force setting and self-learning method also considers the thickness deviation factor of the strip steel, but is affected by other process factors at the same time, and cannot respond directly and quickly to the thickness deviation, so that the problem of the head thickness out of tolerance of the strip steel frequently occurs.
Disclosure of Invention
The application relates to the technical field of steel rolling, and discloses a control method, a device and electronic equipment for thickness deviation of a head of hot continuous rolling strip steel. The problem of thickness deviation of the head part of the strip steel caused by the calculation deviation of the rolling force setting can be effectively solved.
Other features and advantages of the present application will be apparent from the following detailed description, or may be learned in part by the practice of the application.
According to an aspect of the embodiment of the application, there is provided a method for controlling thickness deviation of a head of a hot continuous rolling strip steel, the method comprising: acquiring an actual head thickness value of a current strip steel and a target head thickness value of the current strip steel in a rolling process of a hot continuous rolling unit; determining a head thickness deviation value of the current strip steel according to the actual head thickness value and the target head thickness value; acquiring the actual rolling force of the current strip steel and the calculated rolling force of the current strip steel; determining a rolling force deviation value of the current strip steel according to the actual rolling force and the calculated rolling force; and determining the target set rolling force of the strip steel of the next coil of strip steel of the current strip steel according to the head thickness deviation value and the rolling force deviation value.
In one embodiment of the present application, based on the foregoing solution, the determining the head thickness deviation value of the current strip steel according to the actual head thickness value and the target head thickness value includes: and calculating the difference value of the actual head thickness value minus the target head thickness value as the head thickness deviation value of the current strip steel.
In one embodiment of the present application, based on the foregoing solution, the determining the rolling force deviation value of the current strip steel according to the actual rolling force and the calculated rolling force includes: and calculating the difference value of the calculated rolling force minus the actual rolling force as the rolling force deviation value of the current strip steel.
In one embodiment of the present application, based on the foregoing aspect, the determining the target set rolling force of the strip steel subsequent to the current strip steel according to the head thickness deviation value and the rolling force deviation value includes: acquiring an initial set rolling force of a strip steel subsequent to the current strip steel; if the head thickness deviation value and the rolling force deviation value meet preset conditions, adjusting the initial set rolling force of the strip steel of the next coil of the current strip steel to obtain the target set rolling force of the strip steel of the next coil of the current strip steel; the preset conditions include: the head thickness deviation value of the current strip steel is larger than 0, and the rolling force deviation value of the current strip steel is larger than 0; or the head thickness deviation value of the current strip steel is smaller than 0, and the rolling force deviation value of the current strip steel is smaller than 0.
In one embodiment of the present application, based on the foregoing solution, the adjusting the initial set rolling force of the strip steel subsequent to the current strip steel to obtain the target set rolling force of the strip steel subsequent to the current strip steel includes: according to the head thickness deviation value and the rolling force deviation value, determining a rolling force compensation coefficient of a strip steel of the next coil of strip steel of the current strip steel; and determining the target set rolling force of the strip steel of the next coil of strip steel of the current strip steel according to the initial set rolling force and the rolling force compensation coefficient.
In one embodiment of the present application, the rolling force compensation coefficient is calculated by the following formula based on the foregoing scheme:
wherein delta is a rolling force compensation coefficient, G is a gain coefficient, F 1 For calculating rolling force of current strip steel, F 2 For the actual rolling force of the current strip steel, k 1 、k 2 、k 3 For the adjustment coefficient, Δh is the head thickness deviation value, h max The upper limit value of the head thickness deviation.
In one embodiment of the present application, the target set rolling force is calculated based on the foregoing scheme by the following formula:
F 4 ＝F 3 *(1+δ)
wherein F is 4 Setting a rolling force for a target of a subsequent strip of the current strip, F 3 The rolling force is initially set for the next strip steel of the current strip steel, and delta is the compensation coefficient of the rolling force.
In one embodiment of the present application, the adjustment coefficient k is based on the foregoing scheme 1 =0.75, the adjustment coefficient k 2 -2.375, the adjustment coefficient k 3 ＝2.265。
According to an aspect of the embodiments of the present application, there is provided a control device for head thickness deviation of hot continuous rolling strip steel, the device comprising: the first acquisition unit is used for acquiring an actual head thickness value of the current strip steel and a target head thickness value of the current strip steel in the rolling process of the hot continuous rolling unit; a first determining unit, configured to determine a head thickness deviation value of the current strip steel according to the actual head thickness value and the target head thickness value; a second obtaining unit for obtaining an actual rolling force of the current strip steel and a calculated rolling force of the current strip steel; a second determining unit configured to determine a rolling force deviation value of the current strip steel based on the actual rolling force and the calculated rolling force; and a third determining unit configured to determine a target set rolling force of a strip steel subsequent to the current strip steel based on the head thickness deviation value and the rolling force deviation value.
In the technical scheme provided by the application, the actual head thickness value of the current strip steel and the target head thickness value of the current strip steel in the rolling process of the hot continuous rolling unit are obtained, the head thickness deviation value of the current strip steel is determined according to the actual head thickness value and the target head thickness value, the actual rolling force of the current strip steel and the calculated rolling force of the current strip steel are obtained, the rolling force deviation value of the current strip steel is determined according to the actual rolling force and the calculated rolling force, and the target set rolling force of the strip steel of the next coil of the current strip steel is determined according to the head thickness deviation value and the rolling force deviation value. The technical scheme provided by the application can effectively improve the problem of strip steel head thickness deviation caused by rolling force setting calculation deviation.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application. It is apparent that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art. In the drawings:
FIG. 1 is a flow chart showing a method for controlling head thickness deviation of hot continuous rolling strip steel in an embodiment of the present application;
FIG. 2 is a schematic diagram showing the maximum thickness deviation of the strip steel head before improvement in example 1 of the present application;
FIG. 3 is a schematic view showing the maximum thickness deviation of the strip steel head before improvement in example 1 of the present application;
FIG. 4 is a schematic diagram showing the maximum thickness deviation of the strip steel head before improvement in example 2 of the present application;
FIG. 5 is a schematic diagram showing the maximum thickness deviation of the strip steel head before improvement in example 2 of the present application;
FIG. 6 shows a block diagram of a control device for head thickness deviation of hot continuous rolling strip steel in an embodiment of the present application;
fig. 7 shows a schematic diagram of a computer system suitable for use in implementing the electronic device of the embodiments of the present application.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments may be embodied in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art.
Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the present application. One skilled in the relevant art will recognize, however, that the aspects of the application can be practiced without one or more of the specific details, or with other methods, components, devices, steps, etc. In other instances, well-known methods, devices, implementations, or operations are not shown or described in detail to avoid obscuring aspects of the application.
The flow diagrams depicted in the figures are exemplary only, and do not necessarily include all of the elements and operations/steps, nor must they be performed in the order described. For example, some operations/steps may be decomposed, and some operations/steps may be combined or partially combined, so that the order of actual execution may be changed according to actual situations.
The block diagrams depicted in the figures are merely functional entities and do not necessarily correspond to physically separate entities. That is, the functional entities may be implemented in software, or in one or more hardware modules or integrated circuits, or in different networks and/or processor devices and/or microcontroller devices.
It should be noted that: references herein to "a plurality" means two or more. "and/or" describes an association relationship of an association object, meaning that there may be three relationships, e.g., a and/or B may represent: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship.
It should be noted that the terms "first," "second," and the like in the description and claims of the present application and in the above-described figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the objects so used may be interchanged where appropriate such that the embodiments of the present application described herein may be implemented in sequences other than those illustrated or described.
The implementation details of the technical solutions of the embodiments of the present application are described in detail below:
fig. 1 shows a flowchart of a method for controlling the head thickness deviation of a hot continuous rolling strip steel in an embodiment of the present application.
As shown in FIG. 1, the method for controlling the head thickness deviation of the hot continuous rolling strip steel at least comprises steps 110 to 150.
The following will describe the steps 110 to 150 shown in fig. 1 in detail:
in step 110, an actual head thickness value of a current strip steel and a target head thickness value of the current strip steel in a rolling process of a hot continuous rolling mill train are obtained.
In the application, the actual head thickness value of the current strip steel and the target head thickness value of the current strip steel can be obtained through a secondary control system in the hot continuous rolling production line, and the secondary control system can be a PLC control system in the hot continuous rolling production line.
With continued reference to fig. 1, in step 120, a head thickness deviation value for the current strip is determined based on the actual head thickness value and the target head thickness value.
In one embodiment, the determining the head thickness deviation value of the current strip steel according to the actual head thickness value and the target head thickness value includes: and calculating the difference value of the actual head thickness value minus the target head thickness value as the head thickness deviation value of the current strip steel.
In the present application, the thickness of the hot continuous rolled strip steel is one of the key quality control indexes, and when the thickness deviation of the strip steel exceeds the control standard, the thickness deviation is called thickness deviation. When the thickness of the strip steel is out of tolerance, the out of tolerance part is generally cut off, so that the yield is affected, the economic loss is caused, and the process cost is increased. Particularly, as the requirements of downstream processes and users on product size control precision are continuously improved, the control standard of thickness deviation is more and more strict.
The difference value of the actual head thickness value of the current strip steel minus the target head thickness value of the current strip steel is calculated, the head thickness deviation value of the current strip steel can be determined, whether the current strip steel has the thickness out-of-tolerance or not can be determined by judging whether the head thickness deviation value of the current strip steel exceeds the set thickness deviation value range, if the head thickness deviation value of the current strip steel exceeds the set thickness deviation value range, the current strip steel is determined to have the thickness out-of-tolerance, if the current strip steel is determined to have the thickness out-of-tolerance, the current strip steel can be cut off, and the strip steel with the larger difference between the actual thickness and the target thickness can be eliminated.
With continued reference to fig. 1, in step 130, an actual rolling force of the current strip and a calculated rolling force of the current strip are obtained.
In the application, the actual rolling force of the current strip steel can be obtained through a secondary control system in a hot continuous rolling line, the calculated rolling force of the current strip steel can be calculated by utilizing a rolling force calculation model in the secondary control system of the hot continuous rolling line according to rolling parameters of the hot continuous rolling line, the calculated rolling force of the current strip steel can be understood as the theoretical rolling force of the current strip steel in the rolling process under the working condition of the current hot continuous rolling line, and the rolling parameters of the hot continuous rolling line at least comprise one or more of front and back tension, rolling temperature, roller diameter and rolling piece width, and can also comprise rolling parameters which can influence the rolling of the strip steel such as flattening radius, deformation speed and tension.
With continued reference to fig. 1, in step 140, a rolling force deviation value of the current strip steel is determined based on the actual rolling force and the calculated rolling force.
In one embodiment, the determining the rolling force deviation value of the current strip steel according to the actual rolling force and the calculated rolling force includes: and calculating the difference value of the calculated rolling force minus the actual rolling force as the rolling force deviation value of the current strip steel.
In the application, the difference value of the calculated rolling force of the current strip steel is calculated by subtracting the calculated rolling force of the current strip steel from the actual rolling force of the current strip steel, the rolling force deviation value of the current strip steel can be determined, whether the actual rolling force of the current strip steel reaches the calculated rolling force of the current strip steel can be determined by judging whether the rolling force deviation value of the current strip steel exceeds the set rolling force deviation value range, and if the actual rolling force of the current strip steel does not reach the calculated rolling force of the current strip steel, the rolling force of the next strip steel of the current strip steel needs to be appropriately adjusted so that the actual rolling force of the next strip steel of the current strip steel reaches the calculated rolling force of the next strip steel of the current strip steel.
With continued reference to fig. 1, in step 150, a target set rolling force for a subsequent roll of strip steel from the current strip steel is determined based on the head thickness deviation value and the rolling force deviation value.
In one embodiment, the determining the target set rolling force of the strip steel subsequent to the current strip steel according to the head thickness deviation value and the rolling force deviation value includes: acquiring an initial set rolling force of a strip steel subsequent to the current strip steel; if the head thickness deviation value and the rolling force deviation value meet preset conditions, adjusting the initial set rolling force of the strip steel of the next coil of the current strip steel to obtain the target set rolling force of the strip steel of the next coil of the current strip steel; the preset conditions include: the head thickness deviation value of the current strip steel is larger than 0, and the rolling force deviation value of the current strip steel is larger than 0; or the head thickness deviation value of the current strip steel is smaller than 0, and the rolling force deviation value of the current strip steel is smaller than 0.
In the application, the initial set rolling force of the next strip steel of the current strip steel can be obtained through a secondary control system in the hot continuous rolling production line, and if the head thickness deviation value of the current strip steel and the rolling force of the current strip steel meet preset conditions, the initial rolling force of the next strip steel of the current strip steel is adjusted to obtain the target set rolling force of the next strip steel of the current strip steel.
If the head thickness deviation value of the current strip steel is greater than 0 and the rolling force deviation value of the current strip steel is greater than 0, the initial rolling force of the next strip steel of the current strip steel is adjusted, and if the head thickness deviation value of the current strip steel is greater than 0, the rolling force setting can consider that the calculated rolling force calculated by the rolling force model is higher than the actual rolling force according to the self-learning mode in the prior art without considering the thickness deviation, so that the initial setting rolling force of the next strip steel of the current strip steel is further reduced, the positive thickness deviation cannot be eliminated, and even the next strip steel of the current strip steel has larger positive thickness deviation.
If the head thickness deviation value of the current strip steel is smaller than 0 and the rolling force deviation value of the current strip steel is smaller than 0, the initial rolling force of the next strip steel of the current strip steel is adjusted, and if the head thickness deviation value of the current strip steel is smaller than 0, the rolling force setting can consider that the calculated rolling force calculated by the rolling force model is smaller than the actual rolling force according to the self-learning mode in the prior art without considering the thickness deviation, so that the initial setting rolling force of the next strip steel of the current strip steel is further increased, the negative thickness deviation cannot be eliminated, and even larger negative thickness deviation can occur in the next strip steel of the current strip steel.
After judging that the head thickness deviation value of the current strip steel and the rolling force deviation value of the current strip steel meet preset conditions, adjusting the initial set rolling force of the next strip steel of the current strip steel to obtain the target set rolling force of the next strip steel of the current strip steel.
That is, in one embodiment, the adjusting the initial set rolling force of the strip steel subsequent to the current strip steel to obtain the target set rolling force of the strip steel subsequent to the current strip steel includes: according to the head thickness deviation value and the rolling force deviation value, determining a rolling force compensation coefficient of a strip steel of the next coil of strip steel of the current strip steel; and determining the target set rolling force of the strip steel of the next coil of strip steel of the current strip steel according to the initial set rolling force and the rolling force compensation coefficient.
In the application, according to the head thickness deviation value of the current strip steel and the rolling force deviation value of the current strip steel, the reference rolling force deviation value of the current strip steel can be calculated, the reference rolling force deviation value of the current strip steel can be used as the initial adjustment rolling force of the strip steel of the next coil of the current strip steel, and according to the reference rolling force deviation value of the current strip steel, the initial setting rolling force of the strip steel of the next coil of the current strip steel can be adjusted, so that the target setting rolling force of the strip steel of the next coil of the current strip steel can be obtained.
In one embodiment, the rolling force compensation coefficient is calculated by the following formula:
wherein delta is a rolling force compensation coefficient, G is a gain coefficient, F 1 For calculating rolling force of current strip steel, F 2 For the actual rolling force of the current strip steel, k 1 、k 2 、k 3 For the adjustment coefficient, Δh is the head thickness deviation value, h max The upper limit value of the head thickness deviation.
In the present application, the range of the gain coefficient may be 0.8-1.2, the range of the upper limit value of the head thickness deviation value may be 200-300 μm, and the specific values of the gain coefficient and the upper limit value of the head thickness deviation value may be set according to actual needs, which is not limited herein.
In the application, according to the initial adjustment rolling force of the next strip steel of the current strip steel and the calculated rolling force of the current strip steel, the rolling force compensation coefficient of the next strip steel of the current strip steel can be calculated, and the rolling force compensation coefficient is used for carrying out compensation adjustment on the initial set rolling force of the next strip steel of the current strip steel so as to obtain the target set rolling force of the next strip steel of the current strip steel after compensation adjustment.
In one embodiment, the adjustment factor k 1 =0.75, the adjustment coefficient k 2 -2.375, the adjustment coefficient k 3 ＝2.265。
In the present application, it is preferable to adjust the coefficient k 1 ，k 2 ，k 3 The values of (2) are respectively 0.75, -2.375 and 2.265.
Adjusting coefficient k 1 ，k 2 ，k 3 Can be properly used asThe adjusting amplitude of the subsequent strip steel of the front strip steel is smoother, so that other production problems caused by overlarge adjusting amplitude of the rolling force of the subsequent strip steel of the current strip steel can not occur, and the coefficient k is adjusted 1 ，k 2 ，k 3 The specific value of (c) may be set according to actual needs, and is not limited herein.
In one embodiment, the target set rolling force is calculated by the following formula:
F 4 ＝F 3 *(1+δ)
wherein F is 4 Setting a rolling force for a target of a subsequent strip of the current strip, F 3 The rolling force is initially set for the next strip steel of the current strip steel, and delta is the compensation coefficient of the rolling force.
In the application, the target set rolling force of the band steel of the current band steel after compensation adjustment can be calculated according to the rolling force compensation coefficient of the band steel of the next band steel of the current band steel and the initial set rolling force of the band steel of the next band steel of the current band steel.
In one or more technical solutions provided in the embodiments of the present application, at least the following technical effects or advantages are provided:
according to the technical scheme, through improving the rolling force setting precision, the problem of strip steel head thickness deviation caused by rolling force setting calculation deviation can be effectively solved, the occurrence rate of thickness out-of-tolerance is reduced, and the product thickness control precision and the yield are improved.
In order to make it easier for a person skilled in the art to understand the present application, the present application will be described in a specific embodiment with reference to fig. 2 to 5.
Fig. 2 is a schematic diagram showing the maximum thickness deviation of the strip head before improvement in example 1 of the present application.
Fig. 3 is a schematic view showing the maximum thickness deviation of the strip head before improvement in example 1 of the present application.
Fig. 4 is a schematic diagram showing the maximum thickness deviation of the strip head before improvement in example 2 of the present application.
Fig. 5 is a schematic diagram showing the maximum thickness deviation of the strip head before improvement in example 2 of the present application.
Example 1
The method is applied to a 2250 hot rolling production line of a certain factory, and the production process of the hot base galvanized base material with the thickness of 2.5-3.5 mm, wherein the value of the gain coefficient G is 0.9, and the standard range of the thickness deviation of the hot base galvanized base material is-60 mu m.
The maximum thickness deviation condition of the strip steel head before the technical scheme is applied is shown in fig. 2, and the maximum thickness deviation condition can be obtained through calculation by referring to fig. 2, wherein in 32 rolls of hot base galvanized base strip steel, the average thickness deviation value of the strip steel head is-64 mu m, the number of strip steel with the thickness exceeding is 15 rolls, and the ratio of the strip steel with the thickness exceeding to the total number of strip steel is 46.8%.
The maximum thickness deviation condition of the strip steel head after the technical scheme is applied is shown in figure 3, and the maximum thickness deviation condition can be obtained through calculation by referring to figure 3, wherein in 35 rolls of hot base galvanized base strip steel, the average thickness deviation value of the strip steel head is-39 mu m, the number of strip steel with the thickness exceeding is 5 rolls, and the ratio of the strip steel with the thickness exceeding to the total number of strip steel is 14.2%.
As can be seen from the comparison, the average thickness deviation value of the improved strip steel head is reduced by about 39% compared with the average thickness deviation value of the strip steel head before improvement, and the ratio of the strip steel with the thickness exceeding the improved strip steel to the total strip steel is reduced by about 69.6% compared with the ratio of the strip steel with the thickness exceeding the improved strip steel to the total strip steel.
Example 2
The method is applied to a certain factory 1580 hot rolling production line, the production process of the hot base galvanized base material with the thickness of 2.0-3.0 mm, the gain factor G is 1.0, and the standard range of thickness deviation of the hot base galvanized base material is-60 mu m.
The maximum thickness deviation condition of the strip steel head before the technical scheme is applied is shown in fig. 4, and the maximum thickness deviation condition can be obtained through calculation by referring to fig. 4, wherein in 35 rolls of hot base galvanized base strip steel, the average thickness deviation value of the strip steel head is-51 mu m, the number of strip steel with the thickness exceeding is 9 rolls, and the ratio of the strip steel with the thickness exceeding to the total number of strip steel is 25.7%.
The maximum thickness deviation condition of the strip steel head after the technical scheme is applied is shown in fig. 5, and the maximum thickness deviation condition can be obtained through calculation by referring to fig. 5, wherein in 32 rolls of hot base galvanized base strip steel, the average thickness deviation value of the strip steel head is-24 mu m, the number of strip steel with the thickness exceeding is 2 rolls, and the ratio of the strip steel with the thickness exceeding to the total number of strip steel is 6.2%.
As can be seen from the comparison, the average thickness deviation of the improved strip head is reduced by about 52.9% compared with the average thickness deviation of the strip head before improvement, and the ratio of the strip with the thickness deviation to the total strip before improvement is reduced by about 75.8%.
In summary, it can be known that the technical scheme provided by the application can effectively improve the problem of deviation of the thickness of the head of the strip steel caused by the deviation of the rolling force setting calculation, and reduce the occurrence rate of thickness deviation.
The following describes an embodiment of the apparatus of the present application, which may be used to implement the method for controlling the head thickness deviation of the hot continuous rolled strip in the above embodiment of the present application. For details not disclosed in the embodiments of the apparatus of the present application, please refer to an embodiment of the method for controlling the thickness deviation of the head of the hot continuous rolled strip steel.
Fig. 6 shows a block diagram of a control device for head thickness deviation of hot continuous rolling strip steel in an embodiment of the present application.
As shown in fig. 6, a control device 600 for head thickness deviation of hot continuous rolling strip steel in an embodiment of the present application includes: a first acquisition unit 601, a first determination unit 602, a second acquisition unit 603, a second determination unit 604, and a third determination unit 605.
The first obtaining unit 601 is configured to obtain an actual head thickness value of a current strip steel and a target head thickness value of the current strip steel in a rolling process of a hot continuous rolling mill; a first determining unit 602, configured to determine a head thickness deviation value of the current strip steel according to the actual head thickness value and the target head thickness value; a second obtaining unit 603 configured to obtain an actual rolling force of the current strip steel and a calculated rolling force of the current strip steel; a second determining unit 604 configured to determine a rolling force deviation value of the current strip steel based on the actual rolling force and the calculated rolling force; a third determining unit 605 for determining a target set rolling force of a strip steel subsequent to the current strip steel based on the head thickness deviation value and the rolling force deviation value.
In some embodiments of the present application, based on the foregoing scheme, the first determining unit 602 is configured to: and calculating the difference value of the actual head thickness value minus the target head thickness value as the head thickness deviation value of the current strip steel.
In some embodiments of the present application, based on the foregoing scheme, the second determining unit 604 is configured to: and calculating the difference value of the calculated rolling force minus the actual rolling force as the rolling force deviation value of the current strip steel.
In some embodiments of the present application, based on the foregoing scheme, the third determining unit 605 is configured to: acquiring an initial set rolling force of a strip steel subsequent to the current strip steel; if the head thickness deviation value and the rolling force deviation value meet preset conditions, adjusting the initial set rolling force of the strip steel of the next coil of the current strip steel to obtain the target set rolling force of the strip steel of the next coil of the current strip steel; the preset conditions include: the head thickness deviation value of the current strip steel is larger than 0, and the rolling force deviation value of the current strip steel is larger than 0; or the head thickness deviation value of the current strip steel is smaller than 0, and the rolling force deviation value of the current strip steel is smaller than 0.
In some embodiments of the present application, based on the foregoing solution, the third determining unit 605 is further configured to: according to the head thickness deviation value and the rolling force deviation value, determining a rolling force compensation coefficient of a strip steel of the next coil of strip steel of the current strip steel; and determining the target set rolling force of the strip steel of the next coil of strip steel of the current strip steel according to the initial set rolling force and the rolling force compensation coefficient.
In some embodiments of the present application, based on the foregoing solution, the third determining unit 605 is further configured to: the rolling force compensation coefficient is calculated by the following formula:
wherein delta is a rolling force compensation coefficient, G is a gain coefficient, F 1 For calculating rolling force of current strip steel, F 2 For the actual rolling force of the current strip steel, k 1 、k 2 、k 3 For the adjustment coefficient, Δh is the head thickness deviation value, h max The upper limit value of the head thickness deviation.
In some embodiments of the present application, based on the foregoing solution, the third determining unit 605 is further configured to: the target set rolling force is calculated by the following formula:
F 4 ＝F 3 *(1+δ)
wherein F is 4 Setting a rolling force for a target of a subsequent strip of the current strip, F 3 The rolling force is initially set for the next strip steel of the current strip steel, and delta is the compensation coefficient of the rolling force.
In some embodiments of the present application, based on the foregoing solution, the third determining unit 605 is further configured to: the adjustment coefficient k 1 =0.75, the adjustment coefficient k 2 =2.375, the adjustment coefficient k 3 ＝2.265。
The present application also provides a computer program product comprising computer instructions stored in a computer readable storage medium and adapted to be read and executed by a processor to cause a computer device having the processor to perform a method of controlling head thickness deviation of a hot continuous strip steel as described in any one of the embodiments above.
The present application also provides a computer-readable medium that may be embodied in an electronic device; or may exist alone without being assembled into an electronic device. The computer readable storage medium stores at least one program code, and the at least one program code is loaded and executed by a processor to implement the method for controlling the head thickness deviation of the hot continuous rolling strip steel according to any one of the embodiments.
The application also provides electronic equipment, which comprises one or more processors and one or more memories, wherein at least one program code is stored in the one or more memories, and the at least one program code is loaded and executed by the one or more processors to realize the control method for the thickness deviation of the head of the hot continuous rolling strip steel according to any embodiment.
Fig. 7 shows a schematic diagram of a computer system suitable for use in implementing the electronic device of the embodiments of the present application.
It should be noted that, the computer system 700 of the electronic device shown in fig. 7 is only an example, and should not impose any limitation on the functions and the application scope of the embodiments of the present application.
As shown in fig. 7, the computer system 700 includes a central processing unit (Central Processing Unit, CPU) 701 that can perform various appropriate actions and processes, such as performing the methods described in the above embodiments, according to a program stored in a Read-Only Memory (ROM) 702 or a program loaded from a storage section 708 into a random access Memory (Random Access Memory, RAM) 703. In the RAM 703, various programs and data required for the system operation are also stored. The CPU 701, ROM 702, and RAM 703 are connected to each other through a bus 704. An Input/Output (I/O) interface 705 is also connected to bus 704.
The following components are connected to the I/O interface 705: an input section 706 including a keyboard, a mouse, and the like; an output section 707 including a Cathode Ray Tube (CRT), a liquid crystal display (Liquid Crystal Display, LCD), and the like, a speaker, and the like; a storage section 708 including a hard disk or the like; and a communication section 709 including a network interface card such as a LAN (Local Area Network ) card, a modem, or the like. The communication section 709 performs communication processing via a network such as the internet. The drive 710 is also connected to the I/O interface 705 as needed. A removable medium 711 such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, or the like is mounted on the drive 710 as necessary, so that a computer program read therefrom is mounted into the storage section 708 as necessary.
In particular, according to embodiments of the present application, the processes described above with reference to flowcharts may be implemented as computer software programs. For example, embodiments of the present application include a computer program product comprising a computer program embodied on a computer readable medium, the computer program comprising program code for performing the method shown in the flowcharts. In such an embodiment, the computer program may be downloaded and installed from a network via the communication portion 709, and/or installed from the removable medium 711. When executed by a Central Processing Unit (CPU) 701, performs the various functions defined in the system of the present application.
It should be noted that, the computer readable medium shown in the embodiments of the present application may be a computer readable signal medium or a computer readable storage medium, or any combination of the two. The computer readable storage medium can be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or a combination of any of the foregoing. More specific examples of the computer-readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-Only Memory (ROM), an erasable programmable read-Only Memory (Erasable Programmable Read Only Memory, EPROM), flash Memory, an optical fiber, a portable compact disc read-Only Memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the context of this document, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. In the present application, however, a computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, with computer-readable program code embodied therein. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination of the foregoing. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to: wireless, wired, etc., or any suitable combination of the foregoing.
The flowcharts and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present application. Where each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams or flowchart illustration, and combinations of blocks in the block diagrams or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
The units involved in the embodiments of the present application may be implemented by means of software, or may be implemented by means of hardware, and the described units may also be provided in a processor. Wherein the names of the units do not constitute a limitation of the units themselves in some cases.
It should be noted that although in the above detailed description several modules or units of a device for action execution are mentioned, such a division is not mandatory. Indeed, the features and functions of two or more modules or units described above may be embodied in one module or unit, in accordance with embodiments of the present application. Conversely, the features and functions of one module or unit described above may be further divided into a plurality of modules or units to be embodied.
From the above description of embodiments, those skilled in the art will readily appreciate that the example embodiments described herein may be implemented in software, or may be implemented in software in combination with the necessary hardware. Thus, the technical solution according to the embodiments of the present application may be embodied in the form of a software product, which may be stored in a non-volatile storage medium (may be a CD-ROM, a usb disk, a mobile hard disk, etc.) or on a network, and includes several instructions to cause a computing device (may be a personal computer, a server, a touch terminal, or a network device, etc.) to perform the method according to the embodiments of the present application.
Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the embodiments disclosed herein. This application is intended to cover any variations, uses, or adaptations of the application following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the application pertains.
Furthermore, the above-described figures are only illustrative of the processes involved in the method according to exemplary embodiments of the present application, and are not intended to be limiting. It will be readily appreciated that the processes shown in the above figures do not indicate or limit the temporal order of these processes. In addition, it is also readily understood that these processes may be performed synchronously or asynchronously, for example, among a plurality of modules.
It is to be understood that the present application is not limited to the precise construction set forth above and shown in the drawings, and that various modifications and changes may be effected therein without departing from the scope thereof. The scope of the application is limited only by the appended claims.

Claims (10)

1. The method for controlling the thickness deviation of the head of the hot continuous rolling strip steel is characterized by comprising the following steps:
acquiring an actual head thickness value of a current strip steel and a target head thickness value of the current strip steel in a rolling process of a hot continuous rolling unit;
determining a head thickness deviation value of the current strip steel according to the actual head thickness value and the target head thickness value;
acquiring the actual rolling force of the current strip steel and the calculated rolling force of the current strip steel;
determining a rolling force deviation value of the current strip steel according to the actual rolling force and the calculated rolling force;
and determining the target set rolling force of the strip steel of the next coil of strip steel of the current strip steel according to the head thickness deviation value and the rolling force deviation value.
2. The method of claim 1, wherein said determining a head thickness deviation value for the current strip steel based on the actual head thickness value and the target head thickness value comprises:
and calculating the difference value of the actual head thickness value minus the target head thickness value as the head thickness deviation value of the current strip steel.
3. The method of claim 1, wherein said determining a rolling force deviation value for said current strip from said actual rolling force and said calculated rolling force comprises:
and calculating the difference value of the calculated rolling force minus the actual rolling force as the rolling force deviation value of the current strip steel.
4. The method of claim 1, wherein determining a target set rolling force for a subsequent roll of the current strip based on the head thickness deviation value and the rolling force deviation value comprises:
acquiring an initial set rolling force of a strip steel subsequent to the current strip steel;
if the head thickness deviation value and the rolling force deviation value meet preset conditions, adjusting the initial set rolling force of the strip steel of the next coil of the current strip steel to obtain the target set rolling force of the strip steel of the next coil of the current strip steel;
the preset conditions include:
the head thickness deviation value of the current strip steel is larger than 0, and the rolling force deviation value of the current strip steel is larger than 0; or alternatively, the first and second heat exchangers may be,
the head thickness deviation value of the current strip steel is smaller than 0, and the rolling force deviation value of the current strip steel is smaller than 0.
5. The method of claim 4, wherein adjusting the initial set rolling force of the subsequent roll of the current strip to obtain the target set rolling force of the subsequent roll of the current strip comprises:
according to the head thickness deviation value and the rolling force deviation value, determining a rolling force compensation coefficient of a strip steel of the next coil of strip steel of the current strip steel;
and determining the target set rolling force of the strip steel of the next coil of strip steel of the current strip steel according to the initial set rolling force and the rolling force compensation coefficient.
6. The method of claim 5, wherein the rolling force compensation coefficient is calculated by the formula:
wherein delta is a rolling force compensation coefficient, G is a gain coefficient, F 1 For calculating rolling force of current strip steel, F 2 For the actual rolling force of the current strip steel, k 1 、k 2 、k 3 For the adjustment coefficient, Δh is the head thickness deviation value, h max The upper limit value of the head thickness deviation.
7. The method of claim 5, wherein the target set rolling force is calculated by the formula:
F 4 ＝F 3 *(1+δ)
wherein F is 4 Setting a rolling force for a target of a subsequent strip of the current strip, F 3 The rolling force is initially set for the next strip steel of the current strip steel, and delta is the compensation coefficient of the rolling force.
8. The method of claim 5, wherein the adjustment factor k 1 =0.75, the adjustment coefficient k 2 -2.375, the adjustment coefficient k 3 ＝2.265。
9. A control device for head thickness deviation of hot continuous rolling strip steel, characterized in that the device comprises:
the first acquisition unit is used for acquiring an actual head thickness value of the current strip steel and a target head thickness value of the current strip steel in the rolling process of the hot continuous rolling unit;
a first determining unit, configured to determine a head thickness deviation value of the current strip steel according to the actual head thickness value and the target head thickness value;
a second obtaining unit for obtaining an actual rolling force of the current strip steel and a calculated rolling force of the current strip steel;
a second determining unit configured to determine a rolling force deviation value of the current strip steel based on the actual rolling force and the calculated rolling force;
and a third determining unit configured to determine a target set rolling force of a strip steel subsequent to the current strip steel based on the head thickness deviation value and the rolling force deviation value.
10. An electronic device comprising one or more processors and one or more memories, the one or more memories having stored therein at least one program code loaded and executed by the one or more processors to implement the method of controlling head thickness deviation of a hot continuous strip steel as claimed in any of claims 1 to 8.
CN202311297167.4A 2023-10-08 2023-10-08 Control method and device for head thickness deviation of hot continuous rolling strip steel and electronic equipment Pending CN117380753A (en)

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CN202311297167.4A CN117380753A (en) 2023-10-08 2023-10-08 Control method and device for head thickness deviation of hot continuous rolling strip steel and electronic equipment

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