A finishing mill wedge control method based on hot rolling production data

Abstract

This invention discloses a wedge control method for finishing mills based on hot-rolled production data, belonging to the field of steel rolling automation technology. The method includes: determining whether the roughing mill exit shape of the current strip is the same as that of the previous strip; when the F7 exit multifunction meter does not detect strip, calculating a first roll gap adjustment amount based on the above determination result using the difference in rolling force between stands or according to the genetic relationship between strip shapes; when the F7 exit multifunction meter detects strip, calculating a second roll gap adjustment amount based on the wedge detected by the F7 exit multifunction meter; and weightedly combining the first and second roll gap adjustment amounts to obtain the final roll gap adjustment amount. This invention combines operator experience with a mechanistic model to establish a scientific and accurate wedge control model, which can effectively reduce operator intervention and improve the stability of the rolling process and the accuracy of wedge control.

Description

Technical Field

[0001] This invention relates to the field of steel rolling automation technology, and in particular to a finishing wedge control method based on hot rolling production data. Background Technology

[0002] The steel industry is a crucial component of modern industry. With the rapid development of industries such as shipbuilding, port machinery, bridge construction, aerospace, automobiles, and home appliances, the demand for plate and strip steel has increased dramatically. However, during the rolling process of plate and strip steel, asymmetrical shape defects can occur due to the influence of asymmetrical shape factors. This manifests as wedge-shaped problems in finishing rolling, which not only reduces product yield and equipment lifespan but may also affect production stability and even lead to safety hazards. Statistics show that approximately 30% to 50% of the total scrap steel produced annually due to asymmetrical shape defects during rolling production, resulting in serious resource waste and economic losses. This is a global problem that has attracted widespread attention from production enterprises and research fields.

[0003] In the finishing rolling area, due to the influence of asymmetric factors, wedge-shaped quality problems may occur in the strip. On-site, the wedge shape of the strip is mainly controlled by the operator observing and adjusting the roll gap. However, the strip defects caused by asymmetric factors are a multi-factor coupled problem, and relying on the operator's visual observation of the strip wedge shape for adjustment lacks a certain degree of accuracy. Summary of the Invention

[0004] This invention provides a finishing wedge control method based on hot rolling production data to solve the technical problem that the current method of adjusting the strip wedge shape by relying on the operator's visual observation is not accurate enough.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0006] On one hand, the present invention provides a finishing wedge control method based on hot rolling production data, comprising:

[0007] Determine whether the current strip is the same as the roughing roll exit shape of the previous strip, and obtain the determination result;

[0008] When the F7 export multifunction instrument does not detect strip steel, the first roll gap adjustment amount is calculated based on the judgment result by the difference in rolling force of the stand, or the first roll gap adjustment amount is calculated based on the wedge leveling value in the steady rolling process of the previous strip steel according to the genetic relationship between the strip shapes.

[0009] When the F7 exit multifunction meter detects the strip, the second roll gap adjustment amount is calculated based on the wedge shape detected by the F7 exit multifunction meter.

[0010] Different weights are assigned to the first roll gap adjustment amount and the second roll gap adjustment amount. According to the assigned weights, the first roll gap adjustment amount and the second roll gap adjustment amount are weighted and combined to obtain the final roll gap adjustment amount.

[0011] Furthermore, the rough rolling exit strip shape is divided into straight sickle bend, upper C-shaped sickle bend, lower C-shaped sickle bend, upper front L-shaped sickle bend, upper rear L-shaped sickle bend, lower front L-shaped sickle bend, lower rear L-shaped sickle bend, upper S-shaped sickle bend, and lower S-shaped sickle bend.

[0012] The determination method for the rough rolling exit strip shape is as follows: The first n% of the points and the last n% of the points on the rough rolling center line extracted by the rough rolling exit multi-functional instrument are respectively used as the head and tail of the sickle bend, and the average bending amounts S h and S r are calculated respectively; where n is a preset boundary value for dividing the head and tail of the sickle bend.

[0013] When |S h | < M and |S r | < M, it is determined that the rough rolling exit strip shape is a straight sickle bend.

[0014] When S h > M and S r > M, it is determined that the rough rolling exit strip shape is an upper C-shaped sickle bend.

[0015] When S h < -M and S r < -M, it is determined that the rough rolling exit strip shape is a lower C-shaped sickle bend.

[0016] When S h > M and |S r | < N, it is determined that the rough rolling exit strip shape is an upper front L-shaped sickle bend.

[0017] When S r > M and |S h | < N, it is determined that the rough rolling exit strip shape is an upper rear L-shaped sickle bend.

[0018] When S h < -M and |S r | < N, it is determined that the rough rolling exit strip shape is a lower front L-shaped sickle bend.

[0019] When S r < -M and |S h | < N, it is determined that the rough rolling exit strip shape is a lower rear L-shaped sickle bend.

[0020] When S h > M and S rWhen <-M, the roughing exit strip shape is determined to be an upper S-shaped sickle bend;

[0021] When S h <-M and S r When M >, the roughing exit strip shape is determined to be a downward S-shaped sickle bend;

[0022] Where M is the preset range of sickle-shaped feature points; N is the preset range of sickle-shaped reference points.

[0023] Furthermore, based on the judgment result, the first roll gap adjustment amount is calculated through the difference in rolling force between the stands, or the first roll gap adjustment amount is calculated based on the inheritance relationship between the strip shapes through the wedge leveling value during the steady-state rolling process of the previous strip, including:

[0024] If the current strip has the same roughing exit shape as the previous strip, the first roll gap adjustment amount is calculated based on the wedge leveling value during the steady-state rolling process of the previous strip, according to the genetic relationship between the strip shapes.

[0025] If the roughing exit shape of the current strip is different from that of the previous strip, the first roll gap adjustment amount is calculated based on the difference in rolling force between the stands.

[0026] Furthermore, the formula for calculating the first roll gap adjustment amount based on the wedge leveling value during the steady-state rolling process of the previous strip is as follows:

[0027] ΔS ai =α*AS avei

[0028] Where, ΔS ai The first roll gap adjustment of the i-th frame is represented by α; the attenuation coefficient is represented by ΔS. avei This represents the average wedge leveling value of the i-th stand during the steady-state rolling process of the previous strip.

[0029] Furthermore, the formula for calculating the first roll gap adjustment amount based on the difference in rolling force between the stands is as follows:

[0030]

[0031] Where, ΔS ai k represents the first roll gap adjustment amount for the i-th frame; i This represents the stiffness of the i-th rack; This represents the average rolling force difference of the i-th stand.

[0032] Furthermore, the second roll gap adjustment amount is calculated using the wedge shape detected by the F7 exit multifunction meter, including:

[0033] Obtain the target thickness of F7 strip steel at the exit, and determine the strip steel thickness coefficient based on the target thickness of the strip steel at the exit;

[0034] Based on the thickness coefficient, the second roll gap adjustment amount is calculated once every preset time interval.

[0035] Furthermore, the strip thickness coefficient is expressed as:

[0036]

[0037] Where K represents the strip thickness coefficient; H t Indicates the target thickness for strip steel export; H min H max These are the preset lower and upper limits of the thickness boundary coefficient, respectively; θ, ρ, and μ are preset calculation coefficients; e is a natural number.

[0038] Furthermore, the formula for calculating the second roll gap adjustment amount is as follows:

[0039]

[0040] Where, ΔS bi The second roll gap adjustment for the i-th frame is indicated by K; K represents the strip thickness coefficient; W ave Indicates the F7 export wedge mean; ε i This represents the reduction ratio of the i-th rack.

[0041] Furthermore, the final roll gap adjustment is expressed as:

[0042] ΔS i =γΔS ai +δΔS pi

[0043] Where, ΔS i ΔS represents the final roll gap adjustment for the i-th frame; ai ΔS represents the first roll gap adjustment amount for the i-th frame; bi γ represents the second roll gap adjustment amount for the i-th frame; γ and δ are both preset weight values.

[0044] Furthermore, when the F7 export multifunction meter does not detect strip steel but the i-th frame bites the strip steel, γ is 1 and δ is 0; when the i-th frame bites the strip steel and the F7 export multifunction meter detects the strip steel, γ is 0.05 and δ is 0.95.

[0045] In another aspect, the present invention also provides an electronic device comprising a processor and a memory; wherein the memory stores at least one instruction, which is loaded and executed by the processor to implement the above-described method.

[0046] In another aspect, the present invention also provides a computer-readable storage medium storing at least one instruction, which is loaded and executed by a processor to implement the above method.

[0047] The beneficial effects of the technical solution provided by this invention include at least the following:

[0048] The technical solution of this invention first analyzes the genetic relationship between the average rolling force or strip shape of each stand, and then calculates the wedge value detected by the F7 exit multifunction instrument to obtain the roll gap adjustment amount that should be caused by the two. The two roll gap adjustment amounts are multiplied by different weights to obtain the final roll gap adjustment amount. This effectively avoids the problem of excessive wedge shape of the finished strip due to operator error, greatly improves the wedge shape qualification rate of the strip on site, and reduces the occurrence of scrap steel and rolling instability caused by strip wedge shape. Attached Figure Description

[0049] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0050] Figure 1 This is a flowchart of the finishing wedge control method based on hot rolling production data provided in an embodiment of the present invention;

[0051] Figure 2 This is a schematic diagram of nine types of sickle bends and the reference point intervals of feature points provided in the embodiments of the present invention;

[0052] Figure 3 This is a system block diagram of the electronic device provided in the embodiments of the present invention. Detailed Implementation

[0053] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0054] First, it should be noted that in the embodiments of the present invention, the words "exemplarily," "for example," etc., are used to indicate that they are examples, illustrations, or descriptions. Any embodiment or design scheme described as "exemplary" in the present invention should not be construed as being more preferred or advantageous than other embodiments or design schemes. Specifically, the use of the term "exemplarily" is intended to present the concept in a specific manner. Furthermore, in the embodiments of the present invention, the meaning expressed by "and / or" can be both, or it can be either one or the other.

[0055] First Embodiment

[0056] This embodiment provides a finishing mill wedge control method based on hot rolling production data. Starting from the influencing factors of strip wedge shape, this method establishes an efficient and accurate wedge control model to achieve precise control of the finishing mill wedge shape. Its implementation principle is as follows: based on the rolling force difference between each stand and the wedge shape detected by the multi-function instrument at the F7 exit, two roll gap adjustment amounts are calculated. Finally, these two roll gap adjustment amounts are multiplied by different weights to obtain the total roll gap adjustment amount, which is then output. This method can be implemented by electronic equipment, such as a terminal or server. The execution flow of this method is as follows: Figure 1 As shown, it includes the following steps:

[0057] S1, determine whether the current strip is the same as the roughing exit shape of the previous strip, and obtain the judgment result;

[0058] Specifically, in this embodiment, the shape of the strip is determined as follows:

[0059] S11. Obtain the width measurement data from the roughing mill exit gauge and process it. Specifically, take the first n% and last n% of the points on the center line of the roughing mill extracted by the multi-function instrument at the roughing mill exit as the head and tail of the sickle bend, respectively, and calculate the average bending amount S at the head and tail of the sickle bend. h and S r ;

[0060] Where n is the dimensionless boundary value for dividing the tail of the sickle-shaped bend, obtained through field experience and finite element simulation; S h The average bending amount of the sickle-shaped bend head, in mm, was obtained using a multi-function instrument at the roughing mill exit; S r The mean bending amount at the tail of the sickle bend is measured in mm and obtained using a multi-function instrument at the roughing mill exit.

[0061] S12, determine whether the current piece of steel is the same as the roughing roll exit shape of the previous piece of steel according to the judgment criteria, as follows:

[0062] The roughing mill exit shape is divided into nine types of bends: straight, upper C, lower C, upper front L, upper back L, lower front L, lower back L, upper S, and lower S. Based on the obtained bending amount at the head and tail of the roughing mill exit centerline, the roughing mill exit shape of the current block steel and the previous block steel is determined according to the judgment criteria. The specific judgment criteria are shown in Table 1.

[0063] Table 1: Criteria for Determining the Sickle Curve

[0064]

[0065]

[0066] Where M is the range of characteristic points of the sickle bend, in mm, obtained through field experience;

[0067] N represents the reference point interval for the sickle bend, in mm, obtained through field experience.

[0068] S13, the result of judging whether the current piece of steel is the same as the roughing roll exit shape of the previous piece of steel is expressed as:

[0069]

[0070] Wherein, β is the shape coefficient, which is dimensionless and is obtained by determining the shape of the plate at the roughing mill exit.

[0071] S2, when the multi-function instrument at F7 exit does not detect strip steel, the first roll gap adjustment amount is calculated based on the judgment result by the difference in rolling force of the stand, or the first roll gap adjustment amount is calculated based on the wedge leveling value during the steady rolling process of the previous strip steel according to the genetic relationship between the strip shapes.

[0072] In this embodiment, when the F7 exit multifunction meter does not detect strip steel, if the strip shape at the roughing mill exit is the same, the wedge leveling value during the steady-state rolling process of the upper strip is obtained to calculate the roll gap adjustment amount, which is then issued as the pre-swing value. If the strip shape at the roughing mill exit is different, the roll gap adjustment amount is calculated based on the difference in rolling force between the stands. The specific process is as follows:

[0073] S21, obtain the wedge leveling value during the steady-state rolling process of the upper steel block, and calculate the roll gap adjustment amount, as follows:

[0074] ΔS 1i =α*ΔS avei

[0075] Wherein, α is the attenuation coefficient, which is dimensionless and obtained through finite element simulation;

[0076] ΔS avei The average wedge leveling value of the i-th stand during the steady-state rolling process of the upper steel block is in mm and is obtained through calculation.

[0077] ΔS 1i The genetic roll gap adjustment for the i-th frame, in mm, is obtained through calculation.

[0078] S22: The roll gap adjustment is calculated based on the difference in rolling force between the stands, using the following formula:

[0079]

[0080] Where, ΔS 2i The roll gap adjustment amount for the rolling force difference of the i-th stand, in mm, is obtained through calculation.

[0081] k iLet be the stiffness of the i-th frame, in kN / mm, obtained through the primary system;

[0082] The average rolling force difference for the i-th stand is expressed in kN and is obtained through calculation.

[0083] S23: The roll gap adjustment amount when the F7 exit multifunction meter does not detect strip steel is obtained based on whether the strip shape at the roughing mill exit is the same. The formula is as follows:

[0084] ΔS ai =βΔS 1i +(1-β)ΔS 2i

[0085] Where, ΔS ai The first roll gap adjustment for the i-th frame is the roll gap adjustment for the i-th frame where no exit wedge was detected. The unit is mm, and it is obtained through calculation.

[0086] It should be noted that in S2, the control of the wedge shape is mainly divided into head and body control. When the multi-function instrument at the F7 exit does not detect the strip, it is impossible to calculate the roll gap adjustment amount by back-calculating the wedge shape in S3. At this time, there are two methods to regulate the head wedge shape. The first method is to calculate the roll gap difference by reflecting the wedge value through the difference in rolling force. The second method is to calculate the roll gap difference based on the genetic relationship between the strip shapes. Finite element simulation found that strips with consistent strip shapes at the roughing mill exit have roughly the same wedge shape performance. Therefore, the average value of the wedge leveling value of the steady-state process of the previous strip is processed and used as the pre-swing value and sent to the current strip. In the case of consistent strip shapes, the second method is better than the first method. Therefore, when the strip shapes are consistent, the second method is preferred.

[0087] S3, when the F7 exit multifunction instrument detects the strip, the second roll gap adjustment amount is calculated based on the wedge detected by the F7 exit multifunction instrument;

[0088] Specifically, in this embodiment, the calculation process for the second roll gap adjustment is as follows:

[0089] S31: Determine the thickness coefficient for obtaining the target export thickness of F7 strip steel.

[0090] It should be noted that, based on simulation experiments and field experience, when the target thickness of the strip at the exit is small, wedge control of the strip can easily lead to waviness. Therefore, when the target thickness at the exit is small, the wedge adjustment amount needs to be reduced. When the target thickness of the strip at the exit is large, the wedge has less impact on strip forming and mainly serves to control deviation. To avoid conflict with deviation control, the wedge adjustment amount should be reduced. The specific formula is as follows:

[0091]

[0092] Wherein, K is the strip thickness coefficient, which is dimensionless and is obtained by fitting the formula based on the simulation results;

[0093] H t The target thickness for strip steel export is in mm, obtained through the on-site primary system.

[0094] H min H max The thickness boundary coefficient, in mm, is obtained through field experience and finite element simulation.

[0095] θ, ρ, and μ are dimensionless coefficients obtained through finite element simulation fitting calculations.

[0096] S32: Calculate the roll gap adjustment:

[0097] When the F7 exit multifunction meter detects a strip wedge shape, the average value of the F7 exit wedge shape is calculated every t0 time interval, and the roll gap adjustment is calculated every t0 time interval. The specific calculation formula is as follows:

[0098]

[0099] Where t0 is the sampling interval time, in seconds, which is set according to the actual situation on site;

[0100] i is the rack number, i = 1, 2, ..., 7;

[0101] ΔS bi The second roll gap adjustment for the i-th frame, also known as the exit wedge roll gap adjustment for the i-th frame, is expressed in mm and is obtained through calculation.

[0102] W ave The average wedge shape at the F7 outlet is measured in mm and calculated using a multi-function instrument at the F7 outlet.

[0103] ε i Let be the reduction ratio of the i-th rack, which is dimensionless and obtained through simulation experiments.

[0104] S4, assign different weights to the first roll gap adjustment amount and the second roll gap adjustment amount, and then perform a weighted combination of the first roll gap adjustment amount and the second roll gap adjustment amount according to the assigned weights to obtain the final roll gap adjustment amount;

[0105] The final roll gap adjustment is expressed as follows:

[0106] ΔS i =γΔS ai +δΔS bi

[0107] Where, ΔS iThis represents the final roll gap adjustment for the i-th frame, in mm, which is obtained through calculation.

[0108] γ is an adjustment coefficient, dimensionless, obtained from finite element simulation experiments;

[0109] δ is the wedge-shaped attenuation coefficient, which is dimensionless and obtained through finite element simulation experiments.

[0110] It should be noted that in S4 above, the two roll gap adjustment amounts can be assigned different weights and added together to obtain the final roll gap adjustment amount according to different stages of rolling. Specifically, the wedge control is divided into two stages: the first stage is when the F7 exit multifunction instrument does not detect strip steel but the i-th stand bites the strip; the second stage is when the i-th stand bites the strip steel and the F7 exit multifunction instrument detects a strip wedge shape. In different stages, different weights are assigned to the two roll gap adjustment amounts, and the two roll gap adjustment amounts are weighted and combined to obtain the final adjustment amount.

[0111] In summary, this embodiment provides a finishing strip wedge control method based on hot rolling production data. This method first analyzes the genetic relationship between the average rolling force or strip shape of each stand, then calculates the wedge value detected by the F7 exit multifunction instrument to obtain the roll gap adjustment amount that should be caused by both. The two roll gap adjustment amounts are multiplied by different weights to obtain the final roll gap adjustment amount. This effectively avoids the problem of excessive wedge shape in the finishing strip caused by operator error, greatly improves the wedge qualification rate of the strip on site, and reduces the occurrence of scrap steel and rolling instability caused by strip wedge shape.

[0112] Second Embodiment

[0113] This embodiment uses the F4 stand of a 1580 line in a certain factory as an example to illustrate the implementation process of the finishing wedge control method based on hot rolling production data provided by the present invention. The implementation process of this method in this example is as follows:

[0114] Step 1: Obtain the width measurement data from the roughing mill exit gauge, and determine whether the current strip shape is the same as the previous strip shape at the roughing mill exit according to the judgment criteria; the specific implementation process is as follows:

[0115] Step 11: Obtain and process the data from the roughing mill exit width gauge, as follows:

[0116] The first n% and last n% points of the roughing mill centerline extracted by the multi-function instrument at the roughing mill exit are taken as the head and tail of the sickle bend, respectively. The mean bending amount S at the head and tail of the sickle bend is calculated respectively. h and S r ;

[0117] Where n is the dividing value for the tail of the sickle bend, which is dimensionless and is obtained as 13 through field experience and finite element simulation.

[0118] S h The mean bending amount of the sickle head is in mm, which is 12.34 mm obtained by the multi-function instrument at the roughing mill exit.

[0119] S r The mean bend at the tail of the sickle curve is 0.67 mm, obtained from a multi-function instrument at the roughing mill exit.

[0120] Step 12: Determine whether the current steel block shape is the same as the previous steel block exit shape according to the judgment criteria, as follows:

[0121] The roughing mill exit shape is classified into nine types: straight, upper C, lower C, upper front L, upper rear L, lower front L, lower rear L, upper S, and lower S. Based on the obtained bending amount at the head and tail of the roughing mill exit centerline, the roughing mill exit shape of the current and previous steel blocks is determined according to the judgment criteria, as shown in Table 1. The nine types of sickle bends and their characteristic point reference point intervals are as follows: Figure 2 As shown; the judgment result is expressed as:

[0122]

[0123] Wherein, β is the plate shape coefficient, which is dimensionless and is obtained by determining the plate shape at the roughing mill exit;

[0124] M in Table 1 represents the range of characteristic points of the sickle bend, in mm, which is 15 mm based on field experience.

[0125] In Table 1, N represents the reference point interval for the sickle bend, in mm, which is 10 mm based on field experience.

[0126] In this embodiment, based on the above determination criteria, the current steel block is determined to be straight. The database is read and found to be the same shape as the previous steel plate, therefore β = 0.

[0127] Step 2: When the F7 exit multifunction meter does not detect strip steel, if the strip shape at the roughing mill exit is the same, the wedge leveling value during the steady-state rolling process of the upper strip is obtained to calculate the roll gap adjustment amount, which is then issued as the pre-swing value. If the strip shape at the roughing mill exit is different, the roll gap adjustment amount is calculated based on the difference in rolling force between the stands. The specific implementation process is as follows:

[0128] Step 21: Obtain the wedge leveling value during the steady-state rolling process of the upper steel block, and calculate the roll gap adjustment amount as follows:

[0129] ΔS 1i =α*ΔS avei

[0130] Where α is the attenuation coefficient, which is dimensionless and is obtained as 0.47 through finite element simulation;

[0131] ΔS avei The average wedge leveling value of the i-th stand during the steady-state rolling process of the upper steel block is 0.32 mm, which is obtained through calculation. In this embodiment, the value of i is 4 (the same below).

[0132] ΔS 1i The genetic roll gap adjustment for the i-th frame is in mm, and is calculated to be 0.1504 mm.

[0133] Step 22: Calculate the roll gap adjustment amount based on the difference in rolling force between the stands;

[0134]

[0135] Where, ΔS 2i The roll gap adjustment for the rolling force difference of the i-th stand, in mm, is calculated to be 0.0127 mm.

[0136] k i Let be the stiffness of the i-th frame, in kN / mm, which is 2198.43 kN / mm obtained through the primary system;

[0137] The average rolling force difference of the i-th stand is expressed in kN, and is calculated to be 279.3 kN.

[0138] Step 23: Determine the roll gap adjustment amount when the F7 exit multifunction meter does not detect strip steel based on whether the strip shape at the roughing mill exit is the same.

[0139] ΔS ai =βΔS 1i +(1-β)ΔS 2i

[0140] Where, ΔS ai The roll gap adjustment for the undetected exit wedge of the i-th frame is in mm, and is calculated to be 0.1504 mm.

[0141] Step 3: When the F7 exit multifunction meter detects the strip, calculate the roll gap adjustment amount based on the wedge shape detected by the F7 exit multifunction meter;

[0142] Step 31: Obtain the target thickness of F7 strip steel at the export and determine the thickness coefficient:

[0143]

[0144] Where K is the strip thickness coefficient, which is dimensionless. K = 7.6 mm was calculated based on the formula obtained by fitting the simulation results.

[0145] H tThe target thickness for strip steel export is in mm, and it is 4.8 mm as obtained through the on-site primary system.

[0146] H min H max H represents the thickness boundary factor, in mm, obtained through field experience and finite element simulation. min =2mm, H max =6mm.

[0147] θ, ρ, and μ are dimensionless coefficients, obtained through finite element simulation fitting calculations, where θ = 2, ρ = 2, and μ = 0.5.

[0148] Step 32: Calculate the roll gap adjustment amount, as follows:

[0149] When the F7 exit multifunction meter detects a strip wedge shape, the average value of the F7 exit wedge shape is calculated every t0 time interval, and the roll gap adjustment is calculated every t0 time interval. In this embodiment, a random t0 time interval is extracted to calculate the roll gap adjustment, and the specific calculation formula is as follows:

[0150]

[0151] Where t0 is the sampling interval time, in seconds, and is set to 50ms according to the actual situation on site;

[0152] i is the rack number, i = 4;

[0153] ε i Let be the reduction ratio of the i-th rack, which is dimensionless. The reduction ratios of each rack were obtained through simulation experiments, as shown in the table below.

[0154] Table 2: Compression rates of each rack obtained from simulation experiments

[0155] <![CDATA[ε1]]> <![CDATA[ε2]]> <![CDATA[ε3]]> <![CDATA[ε4]]> <![CDATA[ε5]]> <![CDATA[ε6]]> <![CDATA[ε7]]> 0.4 0.35 0.31 0.25 0.25 0.2 0.18

[0156] W ave The average wedge shape at the F7 outlet is measured in mm and calculated to be 0.017 mm using a multi-function meter at the F7 outlet.

[0157] ΔS b4 The roll gap adjustment for the 4th frame is in mm, and the calculated roll gap adjustment is 0.026 mm.

[0158] Step 4: Assign different weights to the two roll gap adjustment amounts according to different rolling stages, and add them together to obtain the final roll gap adjustment amount, as follows:

[0159] ΔS i =γΔS ai +δΔS bi

[0160] Wherein, γ is an adjustment coefficient, which is dimensionless and obtained from finite element simulation experiments;

[0161] δ is the wedge attenuation coefficient, which is dimensionless and is obtained through finite element simulation experiments as shown in the table below;

[0162] Table 3: Coefficient values ​​at different stages

[0163] Phase 1 Phase Two γ 1 0.05 δ 0 0.95

[0164] Where, ΔS i This represents the total roll gap adjustment for the i-th frame, expressed in mm.

[0165] The final roll gap adjustment result obtained through calculation is shown in the table below;

[0166] Table 4: Calculation of Leveling Values ​​at Different Stages

[0167] Phase 1 Phase Two <![CDATA[ΔS i ]]> 0.1504 0.0322

[0168] Third Embodiment

[0169] This embodiment provides an electronic device, such as... Figure 3 As shown, the electronic device includes a processor and a memory; wherein the processor and the memory can be connected via a communication bus; the memory stores at least one instruction, which is loaded and executed by the processor to implement the method of the first embodiment described above. Furthermore, the electronic device may also include a transceiver, the processor and the transceiver can be connected via a communication bus, and the transceiver is used to communicate with other devices.

[0170] Below, in conjunction with Figure 3 A detailed introduction to each component of this electronic device is provided below:

[0171] The processor is the control center of the electronic device. The electronic device may include multiple processors, each of which can be a single-core processor (single-CPU) or a multi-core processor (multi-CPU). The term "processor" can refer to a single processor or a collective term for multiple processing elements. For example, a processor can be one or more central processing units (CPUs), other general-purpose processors, application-specific integrated circuits (ASICs), or one or more integrated circuits configured to implement embodiments of the present invention, such as one or more digital signal processors (DSPs), one or more field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor can be a microprocessor or any conventional processor. The processor can perform various functions of the electronic device by running or executing software programs stored in memory and by calling data stored in memory.

[0172] In a specific implementation, as one example, the processor may include one or more CPUs, for example... Figure 3 CPU0 and CPU1 shown are, of course, merely illustrative examples.

[0173] The memory is used to store the software program that executes the solution of the present invention, and the processor controls its execution. For specific implementation methods, please refer to the above method embodiments, which will not be repeated here.

[0174] Optionally, the memory may be a read-only memory (ROM) or other type of static storage device capable of storing static information and instructions, random access memory (RAM) or other type of dynamic storage device capable of storing information and instructions, or electrically erasable programmable read-only memory (EEPROM), compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compressed optical discs, laser discs, optical discs, digital universal optical discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium capable of carrying or storing desired program code in the form of instructions or data structures and accessible by a computer, but not limited thereto. The memory may be integrated with the processor or may exist independently, and may be accessed through the interface circuit of the electronic device (…). Figure 3 (Not shown in the image) is coupled to the processor; however, this embodiment of the invention does not impose specific limitations on this.

[0175] The transceiver may include a receiver and a transmitter. Figure 3 (Not shown separately). The receiver is used to implement the receiving function, and the transmitter is used to implement the transmitting function. The transceiver can be integrated with the processor or exist independently, and is connected through the interface circuit of the electronic device (…). Figure 3 (Not shown in the image) is coupled to the processor, and this embodiment of the invention does not specifically limit this.

[0176] In addition, it should be noted that, Figure 3 The structure of the electronic device shown is not intended to limit the device. Actual devices may include more or fewer components than shown, or combine certain components, or have different component arrangements. Furthermore, the technical effects achieved by this electronic device when performing the method of the first embodiment described above can be referenced to the technical effects described in the first embodiment; therefore, they will not be repeated here.

[0177] Fourth embodiment

[0178] This embodiment provides a computer-readable storage medium storing at least one instruction, which is loaded and executed by a processor to implement the method of the first embodiment described above. The computer-readable storage medium may be a ROM, random access memory, CD-ROM, magnetic tape, floppy disk, or optical data storage device, etc. The instruction stored therein can be loaded and executed by a processor in a terminal.

[0179] Furthermore, it should be noted that the present invention can be provided as a method, apparatus, or computer program product. Therefore, embodiments of the present invention can take the form of a completely or partially hardware embodiment, a completely or partially software embodiment, or an embodiment combining software and hardware aspects. Moreover, when implemented in software, embodiments of the present invention can take the form of a computer program product implemented on one or more computer-usable storage media containing computer-usable program code. The computer program product includes one or more computer instructions or computer programs. When the computer instructions or computer program are loaded or executed on a computer, all or part of the processes or functions described in the embodiments of the present invention are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any usable medium accessible to a computer or a data storage device such as a server or data center containing one or more sets of usable media. The available medium can be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium. A semiconductor medium can be a solid-state drive (SSD).

[0180] Embodiments of the present invention are described with reference to flowchart illustrations and / or block diagrams of methods, terminal devices (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, embedded processor, or other programmable data processing terminal device to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing terminal device, generate instructions for implementing the flowchart illustrations. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0181] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing terminal device to operate in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1The functions specified in one or more boxes. These computer program instructions may also be loaded onto a computer or other programmable data processing terminal equipment to cause a series of operational steps to be performed on the computer or other programmable terminal equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable terminal equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0182] It should also be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. The terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes said element. Furthermore, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, and B alone, where A and B can be singular or plural. Additionally, the character " / " in this text generally indicates an "or" relationship between the preceding and following objects, but it can also indicate an "AND / OR" relationship. Please refer to the context for specific interpretations. "At least one" refers to one or more items, while "more than" refers to two or more items. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or multiple items. For example, at least one of a, b, or c can be represented as: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple.

[0183] Furthermore, it is understood that in various embodiments of the present invention, the order of the above-mentioned process numbers does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0184] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this invention.

[0185] In the several embodiments provided by this invention, it should be understood that the disclosed devices, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative. For instance, the division of functional modules / units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another device, or some features may be ignored or not executed. Furthermore, the shown or discussed mutual couplings or direct couplings or communication connections may be through some interfaces; indirect couplings or communication connections between devices or units may be electrical, mechanical, or other forms. Units described as separate components may or may not be physically separate, and components shown as units may or may not be physical units, i.e., they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs. Additionally, the functional units in the various embodiments of this invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0186] If the method is implemented as 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, or the part that contributes to the prior art, or a part of the 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 to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0187] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention. It should be pointed out that although preferred embodiments of the present invention have been described, those skilled in the art, once they understand the basic inventive concept of the present invention, can make several improvements and modifications without departing from the principles described herein. These improvements and modifications should also be considered within the scope of protection of the present invention. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the embodiments of the present invention.

Claims

1. A finishing mill wedge control method based on hot rolling production data, characterized in that, include: Determine whether the current strip is the same as the roughing exit shape of the previous strip, and obtain the determination result; When the F7 export multifunction instrument does not detect strip steel, the first roll gap adjustment amount is calculated based on the judgment result by the difference in rolling force of the stand, or the first roll gap adjustment amount is calculated based on the wedge leveling value in the steady rolling process of the previous strip steel according to the genetic relationship between the strip shapes. When the F7 exit multifunction meter detects the strip, the second roll gap adjustment amount is calculated based on the wedge shape detected by the F7 exit multifunction meter. Different weights are assigned to the first roll gap adjustment amount and the second roll gap adjustment amount. According to the assigned weights, the first roll gap adjustment amount and the second roll gap adjustment amount are weighted and combined to obtain the final roll gap adjustment amount.

2. The finishing wedge control method based on hot rolling production data as described in claim 1, characterized in that, The roughing exit shape of strip steel is divided into straight camber, upper C-shaped camber, lower C-shaped camber, upper front L-shaped camber, upper rear L-shaped camber, lower front L-shaped camber, lower rear L-shaped camber, upper S-shaped camber, and lower S-shaped camber. The method for determining the strip shape at the roughing mill exit is as follows: the first n% and last n% of the points on the roughing mill centerline extracted by the multi-function instrument at the roughing mill exit are taken as the head and tail of the sickle bend, respectively, and the average bending amount S at the head and tail of the sickle bend is calculated. h and S r Where n is the preset dividing value for the tail of the sickle-shaped bend; When |S h | < M and |S r | < M, it is determined that the shape of the strip at the rough rolling exit is a straight sickle bend; When S h >M and S r When M >, the roughing exit strip shape is determined to be an upper C-shaped sickle bend; When S h <-M and S r When <-M, the roughing exit shape of the strip is determined to be a downward C-shaped sickle bend; When S h > M and |S r | < N, it is determined that the shape of the rough rolling exit strip steel is the upper front L-shaped sickle bend; When S r > M and |S h | < N, it is determined that the shape of the strip at the rough rolling exit is the upper rear L-shaped camber; When S h <-M and |S r |<N, it is determined that the shape of the rough-rolled strip at the exit is the lower front L-shaped sickle bend; When S r <-M and |S h |<N, it is determined that the shape of the strip at the rough rolling exit is the lower-back L-shaped camber; When S h >M and S r When <-M, the roughing exit strip shape is determined to be an upper S-shaped sickle bend; When S h <-M and S r When M >, the roughing exit strip shape is determined to be a downward S-shaped sickle bend; Where M is the preset range of sickle-shaped feature points; N is the preset range of sickle-shaped reference points.

3. The finishing wedge control method based on hot rolling production data as described in claim 1, characterized in that, Based on the judgment result, the first roll gap adjustment amount is calculated through the difference in rolling force between the stands, or based on the genetic relationship between the strip shapes, the first roll gap adjustment amount is calculated through the wedge leveling value during the steady-state rolling process of the previous strip, including: If the current strip has the same roughing exit shape as the previous strip, the first roll gap adjustment amount is calculated based on the inheritance relationship between the strip shapes and the wedge leveling value during the steady-state rolling process of the previous strip. If the roughing exit shape of the current strip is different from that of the previous strip, the first roll gap adjustment amount is calculated based on the difference in rolling force between the stands.

4. The finishing wedge control method based on hot rolling production data as described in claim 3, characterized in that, The formula for calculating the first roll gap adjustment amount based on the wedge leveling value during the steady-state rolling process of the previous strip is as follows: ΔS ai =α*ΔS avei Where, ΔS ai The first roll gap adjustment of the i-th frame is represented by α; the attenuation coefficient is represented by ΔS. avei This represents the average wedge leveling value of the i-th stand during the steady-state rolling process of the previous strip.

5. The finishing wedge control method based on hot rolling production data as described in claim 3, characterized in that, The formula for calculating the first roll gap adjustment amount based on the difference in rolling force between the stands is as follows: Where, ΔS ai k represents the first roll gap adjustment amount for the i-th frame; i This represents the stiffness of the i-th rack; This represents the average rolling force difference of the i-th stand.

6. The finishing wedge control method based on hot rolling production data as described in claim 1, characterized in that, The calculation of the second roll gap adjustment amount based on the wedge shape detected by the F7 exit multifunction meter includes: Obtain the target thickness of F7 strip steel at the exit, and determine the strip steel thickness coefficient based on the target thickness of the strip steel at the exit; Based on the thickness coefficient, the second roll gap adjustment amount is calculated once every preset time interval.

7. The finishing wedge control method based on hot rolling production data as described in claim 6, characterized in that, The strip thickness coefficient is expressed as follows: Where K represents the strip thickness coefficient; H t Indicates the target thickness for strip steel export; H min H max These are the preset lower and upper limits of the thickness boundary coefficient, respectively; θ, ρ, and μ are preset calculation coefficients; e is a natural number.

8. The finishing wedge control method based on hot rolling production data as described in claim 6, characterized in that, The formula for calculating the second roll gap adjustment is: Where, ΔS bi The second roll gap adjustment for the i-th frame is indicated by K; K represents the strip thickness coefficient; W ave Indicates the F7 export wedge mean; ε i This represents the reduction ratio of the i-th rack.

9. The finishing wedge control method based on hot rolling production data as described in claim 1, characterized in that, The final roll gap adjustment is expressed as follows: ΔS i =γΔS ai +δΔS bi Where, ΔS i ΔS represents the final roll gap adjustment for the i-th frame; ai ΔS represents the first roll gap adjustment amount for the i-th frame; bi γ represents the second roll gap adjustment amount for the i-th frame; γ and δ are both preset weight values.

10. The finishing wedge control method based on hot rolling production data as described in claim 9, characterized in that, When the F7 export multifunction meter does not detect strip steel but the i-th frame bites the strip steel, γ is 1 and δ is 0; when the i-th frame bites the strip steel and the F7 export multifunction meter detects the strip steel, γ is 0.05 and δ is 0.95.

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