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A Dynamic Feedforward Control Method for Rough Rolling Width

A control method and dynamic feed-forward technology, applied in rolling mill control devices, metal rolling, metal rolling, etc., can solve problems such as difficulty in eliminating width, large deviation, uneven strip length along the entire length, etc., and achieve width blockade. The effect of volume reduction, improvement precision, and width control precision improvement

Active Publication Date: 2021-03-12
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the problem that the traditional width control technology of hot rolling and rough rolling in the prior art is difficult to eliminate the defects of all or partial large deviations of the width, the purpose of the present invention is to provide a dynamic feedforward control method for the rough rolling width, which utilizes the rough rolling intermediate pass Width measurement data can dynamically identify the width loss of the full length of the strip, and adopt the full-length multi-point setting control method to compensate for the width loss in subsequent passes as much as possible, solving the problem of unevenness in the direction of the full length of the strip, thereby Significantly improve the precision of hot rolling width control

Method used

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  • A Dynamic Feedforward Control Method for Rough Rolling Width
  • A Dynamic Feedforward Control Method for Rough Rolling Width
  • A Dynamic Feedforward Control Method for Rough Rolling Width

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0105] With steel inlet thickness: passentrythick = 133.02;

[0106] The amount of subsequent road roller pressure: edraft = 38.9;

[0107] Frequency width mean: widthactmean = 853.55;

[0108] Feeling temperature: TEMP = 1101.13;

[0109] Roller roller diameter: ediam = 930.25;

[0110] Horizontal roller pressure: rdraft = 39.3;

[0111] Horizontal roller diameter: rDIAM = 1158.68;

[0112] General short long control curve:

[0113] Head short line control opening degrees: Head = 3.0, 4.0, 5.0, 5.0, 4.0, 4.0, 3.0, 2.0, 1.0, 0

[0114] Head short drum control length: LengthHead = 1050.0

[0115] The tail short-length control opening degree: tail = 3.0, 3.0, 2.0, 2.0, 2.0, 2.0, 0.0, 0.0, 0.0, 0.0

[0116] Tail short turtle control length: Lengthtail = 2500.0

[0117] (1) Rough rolling the first rack of the third measurement width curve:

[0118] Tape steel measured width data graph Figure 6 Distance

[0119] (2) Width statistics and abnormal classification decisions:

[0120] Widt...

Embodiment 2

[0125] With steel entrance thickness: passentrythick = 161.02

[0126] Subsequent road roller pressure: edraft = 32.8

[0127] Width mean: widthactmean = 853.55

[0128] Feeling temperature: TEMP = 1091.13

[0129] Roller roller diameter: ediam = 930.25

[0130] Level roller pressure: rdraft = 30.47

[0131] Horizontal roller diameter: RDIAM = 1158.68

[0132] General short long control curve: Figure 11 , Figure 12 Indicated.

[0133] (1) Rough rolling the first rack third first measured width curve: strip steel measured width data curve Figure 13 Indicated.

[0134] (2) Width statistics and abnormal classification decisions: Width mean: 1253.067, mean square difference: 0.43, width data distribution Figure 14 The number of widths: 1249.25. By comparing the width distribution determination, the width actual value is not a normal distribution, and there is abnormal uneven width.

[0135] (3) Through the data processing, find the steel head, the tail width abnormality, acquire t...

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Abstract

The present invention discloses a dynamic feed-forward control method for rough rolling width. Due to inaccurate rough rolling incoming material information, head and tail position tracking errors in the strip rolling process, etc., it will be difficult for the traditional width control technology to eliminate all widths. or locally large deviations. The invention utilizes the width measurement data of the middle pass of rough rolling to dynamically identify the width loss of the full length of the strip steel, adopts the multi-point setting control method of the full length, and compensates the width loss situation in the subsequent passes as much as possible, thereby solving the problem of strip steel strip width loss. The problem of unevenness in the entire length direction can be solved, thereby significantly improving the precision of hot rolling width control.

Description

Technical field [0001] The present invention relates to the field of rolling steel control, and more particularly to a rough rolling width dynamic feedforward control method. Background technique [0002] Hot rolled rough rolled on the R1 rack, there is a width measuring instrument after the R2 rack, and the general width measurement is given to the process control system to make the average value after the average value is used to reset the calculation, the process control system only considers the full length average width deviation, The setting can only solve the overall deviation problem of the strip. However, it is difficult to improve the local width of the strip. Because of the inaccessibility of the coarse rolling information, the cutting position of the tail position tracking error during the strip rolling process, the width of all or the local large deviation occurs, and the traditional width control technology is difficult to eliminate these deviations. Inventive cont...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B37/22
CPCB21B37/22B21B2201/06
Inventor 张健民沈际海
Owner BAOSHAN IRON & STEEL CO LTD
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