Control method and system for improving adaptability of roller cooling water

Abstract

The invention discloses a control method and system for improving adaptability of roller cooling water. The method comprises the following steps that S1, a steel grade database represented by multiple steel grade codes SGC is established; s2, a roller cooling water database is established according to the steel grade database and the strip steel rolling experience sample, and the proportionality coefficient of the water volume, the water temperature and the strip steel rolling process temperature of different steel grade codes SGC is solved; s3, selecting a steel grade code SGC, and according to the proportionality coefficient of the water temperature extracted from the roller cooling water database and the temperature in the strip steel rolling process, adding a seasonal factor to set the actual water volume of the roller cooling water; compared with the prior art, the method has the beneficial effects that the type and quality of the roller cooling water are accurately controlled through historical experience treatment and addition of the external influence factors, accurate control over the roller temperature is achieved, the roller performance is guaranteed, and therefore the overall production efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of roller cooling, and in particular to a control method and system for improving the adaptability of roller cooling water. Background Art

[0002] During the steel rolling process, the rollers will heat up rapidly due to friction and high-temperature conduction of the metal; cooling water can effectively take away the heat, keep the rollers in a suitable temperature range, and prevent overheating; if the rollers are overheated, it may cause their surfaces to expand, deform, or wear, thus affecting the rolling quality and product accuracy. Cooling water helps maintain the stability and geometry of the roller surface by controlling the temperature of the rollers; proper cooling can reduce thermal fatigue and thermal cracks of the rollers, reduce the frequency of wear and damage to the rollers, and thus extend their service life; by keeping the rollers at a suitable temperature, cooling water helps maintain stable rolling conditions and reduce production interruptions or reduced efficiency due to overheating of the rollers; in summary, roller cooling water plays a vital role in the steel rolling process, which not only helps control the temperature and ensure roller performance, but also improves overall production efficiency.

[0003] In the actual production process, the cooling efficiency of the roll cooling water is affected by many factors such as the ambient temperature, the target outlet temperature of the strip at the finishing mill, and the roll cooling water temperature. In the transmission control method, cooling water is less considered as a factor, which is not conducive to the control of the roll temperature.

[0004] Therefore, the present invention aims to propose a new control strategy, which can realize precise control of the roll temperature and ensure the roll performance by improving and optimizing the existing rolling mill control system, thereby improving the overall production efficiency. Summary of the invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art; to this end, the present invention proposes a control method and system for improving the adaptability of roller cooling water, which are used to solve the technical problems not solved in the prior art.

[0006] To achieve the above object, the present invention provides a control method and system for improving the adaptability of roller cooling water, the method comprising the following steps:

[0007] S1: Establish a steel grade database represented by multiple steel grade codes SGC;

[0008] S2: Establish a roll cooling water database based on the steel grade database and strip rolling experience samples, and calculate the water volume, water temperature and proportional coefficient of the strip rolling process temperature for different steel grade codes SGC;

[0009] S3: Select the steel grade code SGC, set the actual roll cooling water volume based on the water temperature extracted from the roll cooling water database and the proportional coefficient of the strip rolling process temperature, and then add the seasonal factor.

[0010] Further: The specific method of S1 is as follows:

[0011] Perform the first coding according to the steel type and the rack type, wherein the steel type and the rack number each occupy a code, and combine the code occupied by the steel type and the code of the rack number to correspond to the process route;

[0012] Then, the normal rolling thickness range and the normal rolling width range are classified according to the process route.

[0013] Further: The specific method of S2 is as follows:

[0014] The steel grade database provides steel grade codes SGC for distinguishing steel grades, rack numbers, normal rolling thickness intervals, and normal rolling width zones;

[0015] The strip steel rolling experience sample provides parameters corresponding to different steel grades, including: the strip steel rolling process temperature corresponding to different steel grades in the strip steel rolling process, the water temperature of the roller cooling water used in the strip steel rolling process, and the water volume of the roller cooling water used in the strip steel rolling process;

[0016] The corresponding parameters provided by the strip rolling experience samples corresponding to the same steel grade code SGC in the roll cooling water database are obtained, and a cubic fitting empirical function is constructed in Matlab to obtain the proportional coefficients of water volume, water temperature and strip rolling process temperature in the strip rolling experience samples corresponding to different steel grade codes SGC.

[0017] Further: the cubic fitting empirical function is as follows:

[0018]

[0019] Among them, g(x) SGC(n) is a fixed value, which is the corresponding production parameter in the strip steel rolling experience sample corresponding to the steel grade code SGC, specifically, the quality M of the steel grade processed by the roll corresponding to the same steel grade, stand number, normal rolling thickness range and normal rolling width range;

[0020] a SGC(n)1 、a SGC(n)2 、a SGC(n)3 are the water volume, water temperature and proportional coefficient of the strip rolling process temperature in the nth strip rolling process in the strip rolling experience sample corresponding to the steel grade code SGC;

[0021] x SGC(n)1The amount of roll cooling water used in the nth strip rolling process in the strip rolling experience sample corresponding to the steel grade code SGC;

[0022] x SGC(n)2 The water temperature of the roll cooling water used in the nth strip rolling process in the strip rolling experience sample corresponding to the steel grade code SGC;

[0023] x SGC(n)3 is the midpoint of the strip rolling process temperature corresponding to the nth strip rolling process in the strip rolling experience sample corresponding to the steel grade code SGC;

[0024] Then, the proportional coefficients of water volume, water temperature and strip rolling process temperature in the strip rolling experience samples corresponding to different steel grade codes SGC are obtained from the various proportional coefficients of the steel grade SCG.

[0025] Further: the method of obtaining the proportional coefficients of water volume, water temperature and strip rolling process temperature in the strip rolling experience samples corresponding to different steel grade codes SGC from the various proportional coefficients of the steel grade SCG is:

[0026]

[0027] Where n is the number of strip rolling times in the strip rolling experience sample corresponding to the steel grade code SGC;

[0028] a SGC1 、a SGC2 、a SGC3 They are respectively the water quantity, water temperature and proportional coefficient of the strip rolling process temperature obtained for the steel grade code SGC.

[0029] Further: the specific method of adding the seasonal factor to set the actual roller cooling water is:

[0030] Select the actual roll steel grade and quality, and obtain the steel grade code SGC and the proportional coefficient a corresponding to the water volume, water temperature and strip rolling process temperature. SGC1 、a SGC2 、a SGC3 ;

[0031] Reconstructing the actual roll cooling water formula based on the cubic fitting empirical function Calculate the actual amount of roller cooling water x;

[0032] Among them, g(x) is the mass of the steel type that the known roller needs to be processed;

[0033] a SGC1 、a SGC2 、a SGC3 The water quantity, water temperature and proportional coefficient of the strip rolling process temperature obtained for different steel grade codes SGC are respectively;

[0034] x SGC2 The water temperature of the roller cooling water currently used;

[0035] x SGC3 It is the expected strip rolling process temperature adjusted by the seasonal factor B, specifically, the average value of all strip rolling process temperatures included in the strip rolling experience sample corresponding to the steel grade code SGC in the roll cooling water database adjusted by the seasonal factor B.

[0036] Further: the value of the seasonal factor B is a thermometer factor coefficient obtained according to the feedback temperature of the ambient thermometer, and the thermometer factor coefficient is calculated by a piecewise difference method;

[0037] The ambient thermometer feedback temperature is specifically the summer feedback temperature and the winter feedback temperature, and a first-order piecewise difference equation is established to obtain the thermometer factor coefficient, that is, the average rate of change caused by temperature change.

[0038] The present invention also provides a control system for improving the adaptability of roller cooling water, comprising: a computer;

[0039] The computer includes a readable medium storing steps for executing a control method for improving the adaptability of roller cooling water as described in any one of the above items.

[0040] The beneficial effects of the present invention are: by processing historical experience and adding external influencing factors, the type and quality of roller cooling water are accurately controlled, the roller temperature is accurately controlled, the roller performance is guaranteed, and the overall production efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the embodiments of the present invention and the technical solutions in the prior art, the drawings required for use in the embodiments and the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some implementation methods recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0042] Figure 1 It is a system flow chart of the present invention. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application is described and illustrated below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application. Based on the embodiments provided in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0044] Obviously, the drawings described below are only some examples or embodiments of the present application. For ordinary technicians in this field, the present application can be applied to other similar scenarios based on these drawings without any creative work.

[0045] In addition, it can be understood that although the efforts made in this development process may be complex and lengthy, for ordinary technicians in the field related to the contents disclosed in this application, some design, manufacturing or production changes based on the technical contents disclosed in this application are just conventional technical means and should not be understood as the contents disclosed in this application are insufficient.

[0046] Unless otherwise specified, all embodiments and optional embodiments of the present application can be combined with each other to form a new technical solution.

[0047] See also Figure 1 , the system flow chart of the present invention comprises the following steps:

[0048] S1: Establish a steel grade database represented by multiple steel grade codes SGC;

[0049] S2: Establish a roll cooling water database based on the steel grade database and strip rolling experience samples, and calculate the water volume, water temperature and proportional coefficient of the strip rolling process temperature for different steel grade codes SGC;

[0050] S3: Select the steel grade code SGC, set the actual roll cooling water volume based on the water temperature extracted from the roll cooling water database and the proportional coefficient of the strip rolling process temperature, and then add the seasonal factor.

[0051] Specifically:

[0052] Due to differences in production tasks, the processes corresponding to the steel types in the production tasks are different, and the corresponding roller cooling water is different. Therefore, it is necessary to classify the steel type-process. First, the first coding is performed according to the steel type and rack category. The steel type and rack number each occupy a code. The code occupied by the steel type and the rack number are combined to correspond to the process route; then, the normal rolling thickness range and the normal rolling width range are classified according to the process route, so as to facilitate the subsequent search and call of the corresponding roller cooling water.

[0053] Secondly, a roll cooling water database is established, which is specifically based on the steel grade code SGC provided by the steel grade database and the strip steel rolling experience sample;

[0054] The strip rolling experience sample provides parameters corresponding to different steel grades, including: the strip rolling process temperature corresponding to different steel grades in the strip rolling process, the water temperature of the roller cooling water used in the strip rolling process, and the water volume of the roller cooling water used in the strip rolling process; the corresponding parameters provided by the strip rolling experience sample corresponding to the same steel grade code SGC in the roller cooling water database are obtained, and a cubic fitting experience function is constructed in Matlab to obtain the proportional coefficient of the water volume, water temperature, and strip rolling process temperature in the strip rolling experience sample corresponding to different steel grade codes SGC;

[0055] Among them, the cubic fitting empirical function is as follows:

[0056]

[0057] Among them, g(x) SGC ( n ) is a fixed value, which is the corresponding production parameter in the strip steel rolling experience sample corresponding to the steel grade code SGC, specifically, the quality M of the steel grade processed by the roll corresponding to the same steel grade, stand number, normal rolling thickness range and normal rolling width range;

[0058] a SGC(n)1 、a SGC(n)2 、a SGC(n)3 are the water volume, water temperature and proportional coefficient of the strip rolling process temperature in the nth strip rolling process in the strip rolling experience sample corresponding to the steel grade code SGC;

[0059] x SGC(n)1 The amount of roll cooling water used in the nth strip rolling process in the strip rolling experience sample corresponding to the steel grade code SGC;

[0060] x SGC(n)2 The water temperature of the roll cooling water used in the nth strip rolling process in the strip rolling experience sample corresponding to the steel grade code SGC;

[0061] x SGC(n)3 is the midpoint of the strip rolling process temperature corresponding to the nth strip rolling process in the strip rolling experience sample corresponding to the steel grade code SGC;

[0062] Then, the proportional coefficients of water volume, water temperature and strip rolling process temperature in the strip rolling experience samples corresponding to different steel grade codes SGC are obtained from the various proportional coefficients of the steel grade SCG, as follows:

[0063]

[0064] Where n is the number of strip rolling times in the strip rolling experience sample corresponding to the steel grade code SGC;

[0065] a SGC1 、aSGC2 、a SGC3 They are respectively the water quantity, water temperature and proportional coefficient of the strip rolling process temperature obtained for the steel grade code SGC.

[0066] The actual roller cooling water is set according to the calculated proportional coefficients of each parameter and the seasonal factor. The specific method is as follows:

[0067] Select the actual roll steel grade and quality, and obtain the steel grade code SGC and the proportional coefficient a corresponding to the water volume, water temperature and strip rolling process temperature. SGC1 、a SGC2 、a SGC3 ;

[0068] Reconstruct the actual roll cooling water formula based on the cubic fitting empirical function: Calculate the actual amount of roller cooling water x;

[0069] Among them, g(x) is the mass of the steel type that the known roller needs to be processed;

[0070] a SGC1 、a SGC2 、a SGC3 The water quantity, water temperature and proportional coefficient of the strip rolling process temperature obtained for different steel grade codes SGC are respectively;

[0071] x SGC2 The water temperature of the roller cooling water currently used;

[0072] x SGC3 is the expected strip rolling process temperature adjusted by the seasonal factor B, specifically, the average value of all strip rolling process temperatures included in the strip rolling experience sample corresponding to the steel grade code SGC in the roll cooling water database adjusted by the seasonal factor B;

[0073] The value of the seasonal factor B is the thermometer factor coefficient obtained based on the feedback temperature of the ambient thermometer, and the thermometer factor coefficient is calculated by the piecewise difference method;

[0074] The feedback temperature of the ambient thermometer is specifically the summer feedback temperature and the winter feedback temperature. A first-order piecewise difference equation is established to obtain the thermometer factor coefficient, that is, the average rate of change caused by temperature change.

[0075] The above is a very detailed description of one or more embodiments of the present invention, but the content is only a specific example of the present invention and cannot be considered to limit the scope of application of the present invention. Any other methods and changes proposed based on the content of the present invention should fall within the scope of patent protection of the present invention.

Claims

1. A control method for improving the adaptability of roller cooling water, characterized in that: The steps include: S1: Establish a steel grade database represented by multiple steel grade codes SGC; S2: Establish a roll cooling water database based on the steel grade database and strip rolling experience samples, and calculate the water volume, water temperature and proportional coefficient of the strip rolling process temperature for different steel grade codes SGC; S3: Select the steel grade code SGC, set the actual roll cooling water volume based on the water temperature extracted from the roll cooling water database and the proportional coefficient of the strip rolling process temperature, and then add the seasonal factor.

2. A control method for improving the adaptability of roller cooling water according to claim 1, characterized in that: The specific method of S1 is as follows: Perform the first coding according to the steel type and the rack type, wherein the steel type and the rack number each occupy a code, and combine the code occupied by the steel type and the code of the rack number to correspond to the process route; Then, the normal rolling thickness range and the normal rolling width range are classified according to the process route.

3. A control method for improving the adaptability of roller cooling water according to claim 1, characterized in that: The specific method of S2 is as follows: The steel grade database provides steel grade codes SGC for distinguishing steel grades, rack numbers, normal rolling thickness intervals, and normal rolling width zones; The strip steel rolling experience sample provides parameters corresponding to different steel grades, including: the strip steel rolling process temperature corresponding to different steel grades in the strip steel rolling process, the water temperature of the roller cooling water used in the strip steel rolling process, and the water volume of the roller cooling water used in the strip steel rolling process; The corresponding parameters provided by the strip rolling experience samples corresponding to the same steel grade code SGC in the roll cooling water database are obtained, and a cubic fitting empirical function is constructed in Matlab to obtain the proportional coefficients of water volume, water temperature and strip rolling process temperature in the strip rolling experience samples corresponding to different steel grade codes SGC.

4. A control method for improving the adaptability of roller cooling water according to claim 3, characterized in that: The cubic fitting empirical function is as follows: Among them, g(x) SGC ( n ) is a fixed value, which is the corresponding production parameter in the strip steel rolling experience sample corresponding to the steel grade code SGC, specifically, the quality M of the steel grade processed by the roll corresponding to the same steel grade, stand number, normal rolling thickness range and normal rolling width range; aSGC(n)1, aSGC(n)2, aSGC(n)3 are respectively the proportional coefficients of the water volume, water temperature and strip rolling process temperature in the nth strip rolling process in the strip rolling experience sample corresponding to the steel grade code SGC; xSGC(n)1 is the amount of roll cooling water used in the nth strip rolling process in the strip rolling experience sample corresponding to the steel grade code SGC; xSGC(n)2 is the water temperature of the roll cooling water used in the nth strip rolling process in the strip rolling experience sample corresponding to the steel grade code SGC; xSGC(n)3 is the midpoint of the strip rolling process temperature corresponding to the nth strip rolling process in the strip rolling experience sample corresponding to the steel grade code SGC; Then, the proportional coefficients of water volume, water temperature and strip rolling process temperature in the strip rolling experience samples corresponding to different steel grade codes SGC are obtained from the various proportional coefficients of the steel grade SCG.

5. A control method for improving the adaptability of roller cooling water according to claim 4, characterized in that: The method for obtaining the proportional coefficients of water volume, water temperature and strip rolling process temperature in the strip rolling experience samples corresponding to different steel grade codes SGC from the various proportional coefficients of the steel grade SCG is: Where n is the number of strip rolling times in the strip rolling experience sample corresponding to the steel grade code SGC; aSGC1, aSGC2, and aSGC3 are respectively the proportional coefficients of the water volume, water temperature, and strip rolling process temperature of the steel grade code SGC.

6. A control method for improving the adaptability of roller cooling water according to claim 1, characterized in that: The specific method of adding the seasonal factor to set the actual roller cooling water is: Select the steel grade and quality of the actual roll, thereby obtaining the steel grade code SGC and the proportional coefficients aSGC1, aSGC2, and aSGC3 corresponding to the water volume, water temperature, and strip rolling process temperature; Reconstruct the actual roll cooling water formula based on the cubic fitting empirical function: Calculate the actual amount of roller cooling water x; Among them, g(x) is the mass of the steel type that the known roller needs to be processed; aSGC1, aSGC2, and aSGC3 are the proportional coefficients of the water volume, water temperature, and strip rolling process temperature obtained for different steel grade codes SGC, respectively; xSGC2 is the water temperature of the current roller cooling water; xSGC3 is the expected strip rolling process temperature adjusted by the seasonal factor B, which is specifically the average value of all strip rolling process temperatures included in the strip rolling experience sample corresponding to the steel grade code SGC in the roll cooling water database adjusted by the seasonal factor B.

7. A control method for improving the adaptability of roller cooling water according to claim 6, characterized in that: The value of the seasonal factor B is a thermometer factor coefficient obtained according to the feedback temperature of the ambient thermometer, and the thermometer factor coefficient is calculated by a piecewise difference method; The ambient thermometer feedback temperature is specifically the summer feedback temperature and the winter feedback temperature, and a first-order piecewise difference equation is established to obtain the thermometer factor coefficient, that is, the average rate of change caused by temperature change.

8. A control system for improving the adaptability of roller cooling water, characterized in that: include: computer; The computer includes a readable medium storing steps for executing a control method for improving the adaptability of roller cooling water according to any one of claims 1 to 7.

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