CN-117299819-B - Automatic control method for width of hot rolled steel coil

CN117299819BCN 117299819 BCN117299819 BCN 117299819BCN-117299819-B

Abstract

The invention discloses an automatic control method for the width of a hot rolled steel coil, which comprises the steps of firstly collecting width data in the production process of a plate blank, calculating the average value of the width data, calculating the actual steel pulling amount of finish rolling, coiling the actual steel pulling amount, creating a steel pulling amount self-adaptive genetic table, inquiring the steel pulling amount self-adaptive genetic table to obtain genetic data after the plate blank is pulled out, returning and selecting a default width allowance value if the acquisition fails, calculating a coiling width allowance predicted value for the strip steel to be rolled currently if the acquisition is successful, calculating a width allowance correction recommended value, then setting the width allowance of electric equipment according to the default width allowance value or the width allowance correction recommended value, carrying out plate blank rolling control, and finally storing data and updating the steel pulling amount self-adaptive genetic table. The invention improves the width precision of the finished product by means of stable control of the staged steel drawing amount, greatly reduces the manual intervention proportion, greatly improves the rough rolling outlet width hit rate and improves the stability of the width control of the production line.

Inventors

YU JIEBIN
LONG JIANQUN
LIU RUIPENG

Assignees

宝钢湛江钢铁有限公司

Dates

Publication Date: 20260505
Application Date: 20230928

Claims (3)

1. The automatic control method for the width of the hot rolled steel coil is characterized by comprising the following steps of: s1, creating a steel pulling amount self-adaptive genetic table: Acquiring width data of a slab production process, wherein the width data comprises actual measurement point data of a rough rolling outlet width, a finish rolling outlet width and a coiling inlet width, and respectively calculating average values of the actual measurement point data; the steel drawing amount calculation formula is as follows: , , Wherein: FM_Spread_ACT is the actual steel pulling amount of finish rolling; RM_width_ACT is a rough roll outlet Width measurement; FM_width_ACT is the finish rolling outlet Width measurement; DC_Spread_ACT is the actual coiling steel pulling amount; DC_width_ACT is the take-up entrance Width measurement; Counting the first calculation result of the steel pulling amount to obtain initial solution of the steel pulling amount by using the steel type, the width layer, the thickness layer and the finish rolling outlet temperature layer as data dividing conditions, judging whether the deviation between the steel pulling amount of the new steel and the initial solution of the steel pulling amount is more than 10% when the new steel pulling amount data is obtained by calculation, and if not, carrying out data summation by using the ratio of the average value of the steel pulling amount of the new steel to the initial solution of the steel pulling amount to 30%, wherein the result is used as the current solution and written into a steel pulling amount self-adaptive genetic table for repeated iteration of the subsequent width data; s2, calculating a width margin predicted value: After the slab is drawn, inquiring a self-adaptive genetic table of the steel drawing quantity to obtain genetic data, and returning and selecting a default width allowance value to directly execute the step S4 if the acquisition fails; , wherein DC_Spread_ACT is the actual coiling steel pulling amount, and RM_Margin is the rough rolling width allowance; s3, calculating a margin correction recommended value, namely calculating a width margin correction recommended value RM.MGN_RMD, , Wherein delta is the width design tolerance; s4, setting the width margin, namely setting the width margin of the electrical equipment according to a default width margin value or a width margin correction recommended value, and controlling the rolling of the plate blank according to the width margin setting data by the equipment; S5, storing data and updating the steel pulling amount self-adaptive genetic table, namely storing the data and writing the data into the steel pulling amount self-adaptive genetic table after each strip steel rolling is completed; In the step S5, the method further includes displaying a picture, and displaying the corrected recommended value of the strip steel number and the rough rolling width allowance on a display screen after the width allowance of the electrical equipment is set.
2. The method of claim 1, wherein the step S1 of calculating the average value is performed by removing 150 head and tail point data from the collected actual data and calculating an abnormal value having a deviation of more than 30 from the calculated set data, and then using the obtained data as initial screening data.
3. The method for automatically controlling the width of the hot rolled steel coil according to claim 1, wherein the adaptive genetic table of the steel drawing amount is divided into a long-time genetic table and a short-time genetic table, the expansion items comprise steel grade SFC, quality number quality, thickness layer grade THICKCLASS and width layer grade WIDTHCLASS, and the data items comprise finish rolling actual steel drawing amount FM_spring_ACT and coiling actual steel drawing amount DC_spring_ACT; And (3) updating the short-time genetic table according to the average value calculated by the data acquisition method in the step S1 after each strip steel rolling is completed, wherein a long-time genetic table is used for width margin prediction, and the short-time genetic table is copied to the long-time genetic table at two times of shift change in the morning and evening every day.

Description

Automatic control method for width of hot rolled steel coil Technical Field The invention belongs to the technical field of hot rolling, and particularly relates to an automatic control method for the width of a hot rolled steel coil. Background In the hot rolling production process, width control is mainly performed through a width model, and then genetic coefficient self-adaption is performed according to deviation of rolled data and predicted data. The existing neural network model for calculating the rough rolling target width uses tens of influencing factors, so that the calculation accuracy is improved to a higher level. However, due to the characteristics of the neural network model, for a new layer, a certain time is required for model learning, a certain number of blocked steel coils are generated, and for a process technician, the neural network model is difficult to maintain and the adjustment direction is difficult to master. The width calculation model is rich in genetic parameters, has certain coupling, and has the problems of multiple width interventions, low hit rate, high blockage rate and the like because the operator does not know the width control clearly, and the operator can only reference the operation experience during control and has the possibility of misjudgment and misalignment of subjective experience. Disclosure of Invention The invention aims to provide an automatic control method for the width of a hot rolled steel coil, which realizes the self-adaption of the hot rolled width allowance by creating a self-adaption model of the hot rolled width allowance. The width precision of the finished product can be effectively improved, the manual intervention proportion can be greatly reduced, the width hit rate of a rough rolling outlet can be greatly improved, and the steel coil width blocking quantity caused by manual intervention can be reduced. In order to achieve the technical aim, the invention adopts the following technical scheme that the automatic control method for the width of the hot rolled steel coil is characterized by comprising the following steps of. S1, creating a steel pulling amount self-adaptive genetic table. And respectively calculating the difference value of the width of the finish rolling outlet and the width measured value of the rough rolling outlet and the width of the coiling inlet and the width measured value of the rough rolling outlet according to a steel drawing amount calculation formula to obtain the actual steel drawing amount of the finish rolling and the actual steel drawing amount of the coiling, and creating a steel drawing amount self-adaptive genetic table. S2, calculating a width allowance predicted value. After the slab is drawn, inquiring a self-adaptive genetic table of the steel drawing quantity to obtain genetic data, and returning and selecting a default width allowance value to directly execute the step S4 if the acquisition fails; , Wherein DC_Spread_ACT is the actual steel drawing amount of coiling, and RM_Margin is the rough rolling width allowance. S3, recommending the allowance correction value. A margin width correction recommendation rm.mgn_rmd is calculated, , Where delta is the width design tolerance. S4, setting a width allowance. And setting the width margin of the electrical equipment according to the default width margin value or the width margin correction recommended value, and controlling the rolling of the plate blank according to the width margin setting data by the equipment. S5, data storage and updating of a steel pulling amount self-adaptive genetic table. After each time of strip steel rolling is completed, the data are stored and written into an updated steel pulling amount self-adaptive genetic table. Further, the steel drawing amount calculation formula is as follows: , , Wherein: FM_Spread_ACT is the actual steel pulling amount of finish rolling; RM_width_ACT is a rough roll outlet Width measurement; FM_width_ACT is the finish rolling outlet Width measurement; DC_Spread_ACT is the actual coiling steel pulling amount; DC_width_ACT is the take-up entrance Width measurement; And (3) counting the first calculation result of the steel pulling amount to obtain initial solution of the steel pulling amount by using the steel type, the width layer, the thickness layer and the finish rolling outlet temperature layer as data dividing conditions, judging whether the deviation between the steel pulling amount of the new steel and the initial solution of the steel pulling amount is more than 10% when the new steel pulling amount data is obtained by calculation, and if not, carrying out data summation by using the ratio of the average value of the steel pulling amount of the new steel to the initial solution of the steel pulling amount to 30%, wherein the result is used as the current solution, and writing the current solution into a genetic data table for repeated iteration of the subsequent width data. Further, the avera