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Roll change model of steel rolling

A model and roll technology, applied in the field of mathematical models for controlling roll change during steel rolling, can solve problems such as lack of roll change basis and inaccurate part of data.

Active Publication Date: 2021-02-23
LIUZHOU IRON & STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The problem to be solved by the present invention is to provide a roll change model for steel rolling to solve the problem of lack of basis for roll change and inaccurate part of the data caused by defects in the roll change model in existing industrial automation

Method used

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Experimental program
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Effect test

Embodiment Construction

[0050] Embodiments of the present invention are described in further detail below:

[0051] The roll change model of this rolling steel is based on the 1250mm pickling and tandem rolling unit of Liuzhou Iron and Steel Co., Ltd.:

[0052] 1. The material number is L2181016605100, the theoretical length of the exported material is 3839973mm, the actual length of the exported material is 3830959mm, the actual length of the exported material / the theoretical length of the exported material = 1.00, then l 5 =3.831 kilometers. ε 1 , ε 2 , ε 3 , ε 4 , ε 5 are 0.3165, 0.351, 0.2975, 0.2468, 0.07 respectively, then

[0053] l 4 =l 5 ×(1-ε 5 )=3.831×(1-0.07)=3.5628 km;

[0054] l 3 =l 5 ×(1-ε 5 ) × (1-ε 4 )=3.831×(1-0.07)×(1-0.2468)=2.6835 kilometers;

[0055] l 2 =l 5 ×(1-ε 5 ) × (1-ε 4 ) × (1-ε 3 )=3.831×(1-0.07)×(1-0.2468)×(1-0.2975)=1.8852 kilometers;

[0056] l 1 =l 5 ×(1-ε 5 ) × (1-ε 4 ) × (1-ε 3 ) × (1-ε 2 )=3.831×(1-0.07)×(1-0.2468)×(1-0.2975)×(1-0.35...

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Abstract

The invention discloses a roll change model for rolling steel, which comprises the following steps: Step A, ignore the spread during the continuous cold rolling process; Step B, set through the second level and upload it to the third-level PES system; Steps C, 1 5 It is obtained by measuring the length of the finished product of acid rolling; in step D, the rolling kilometers of each stand are obtained during the period of time when the rolls are in the machine; In order to calculate the rolling kilometers of each stand from 1# to 4#, the rolling kilometers of the 5# stand and the reduction rate of each stand are used as calculation elements to obtain reasonable and accurate kilometers. The invention can solve the problems of lack of roll changing basis and inaccurate part of data due to defects in the roll changing model in the existing industrial automation.

Description

technical field [0001] The invention relates to the technical field of cold-rolled steel strip manufacturing, in particular to a mathematical model for controlling roll change during steel rolling. Background technique [0002] The production process of cold-rolled steel strip generally includes hot coiling, feeding and uncoiling, welding, pickling, rolling, coiling, bundling, annealing, skinning, recoil oiling, coiling, and packaging in sequence. The steel coil needs to be replaced when the amount of steel passed by the rolls in the rolling process reaches a certain amount. The commonly used industrial automation (PES) roll change control is to track the amount of steel passed by the rolls and realize the roll change based on the number of rolling kilometers. roll. [0003] The company's cold rolling plant has used PES since December 2016, and there are the following problems: [0004] 1#-3# stand work rolls are based on the rolling tonnage; 4# and 5# stand work rolls are...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B31/08B21B38/00G06F30/20
CPCB21B31/08B21B38/00G06F30/20
Inventor 武辉吴春平谭翠英蔡国庆黄运刚潘敏
Owner LIUZHOU IRON & STEEL