Finish rolling strip steel load distribution setting method

A setting method and load distribution technology, applied in metal rolling, metal rolling, rolling mill control devices, etc., can solve the problems of large fluctuation of stand thickness distribution and large fluctuation of rolling force ratio.

Inactive Publication Date: 2017-12-08
SHANGHAI MEISHAN IRON & STEEL CO LTD
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  • Abstract
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  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a load distribution setting method for finishing strip steel, which mainly solves the large fluctuation of the rolling force ratio of each stand when the rolling status changes in the existing reduction distribution mode, and the rolling force distribution mode in the rolling force distribution mode. When the deviation of the force model is large, the technical problem of the large fluctuation of the thickness distribution of each stand, so as to improve the precision of the rolling schedule setting and rolling stability of the finished strip steel

Method used

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  • Finish rolling strip steel load distribution setting method
  • Finish rolling strip steel load distribution setting method
  • Finish rolling strip steel load distribution setting method

Examples

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Embodiment 1

[0128] Example 1, the information of a certain steel strip is as follows: the thickness of the intermediate billet is 40.377 mm, the thickness of the final rolling is 1.8 mm, the width of the steel strip is 1229.1 mm, and the number of rolling passes of the finishing rolling is n=7. Steel grade information: The steel grade is 11002, the thickness grade is 5, and the width grade is 3. The corresponding layer grade data is as follows:

[0129] Table 1 Distribution coefficient of reduction rate

[0130]

[0131] Table 2 Rolling Force Distribution Coefficient

[0132] Steel category

Thickness grade

α1

α2

α3

α4

Alpha 5

α6

α7

11002

5

1

0.95

0.88

0.78

0.55

0.45

0.36

[0133] In the above step S1, the thickness distribution of each stand of the finish rolling is calculated according to the reduction distribution coefficient table and the distribution mode according to the reduction,

[0134] In order to obtain ...

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Abstract

The invention relates to a load distribution setting method for finishing strip steel, which mainly solves the large fluctuation of the rolling force ratio of each stand when the rolling status changes in the existing reduction distribution mode, and the deviation of the rolling force model in the rolling force distribution mode When it is large, there is a technical problem that the thickness distribution of each rack fluctuates greatly. The method of the present invention includes the following steps: S1. Calculating the thickness distribution of each stand in the finish rolling by pressing the distribution mode, taking out the reduction ratio distribution coefficient of each stand from the reduction distribution coefficient table, and distributing according to the reduction ratio of each stand coefficient to obtain the reduction ratio and outlet thickness of the reduction distribution; S2. Taking the reduction distribution result as the initial value, iteratively calculate the reduction amount of each stand according to the rolling force distribution mode until the rolling force ratio meets the target requirements; S3 1. Carry out limiting processing on the distribution result of the rolling force mode, and carry out relativistic calculation. The method of the invention improves the setting precision and rolling stability of the rolling schedule of the finished strip steel.

Description

technical field [0001] The invention relates to the field of production control of hot continuous rolling strips, in particular to the field of production control of finish-rolled strips, in particular to a method for setting load distribution of finish-rolled strips. Background technique [0002] In hot strip rolling mills, the formulation of rolling regulations plays an important role in improving product quality. Whether it is reasonable or not has a great impact on the quality of products, the difficulty of adjusting rolling equipment, the reliability of unit operation and the production process. have a direct impact on the stability of the Load distribution is the core of the rolling procedure, which directly affects product quality such as shape and thickness accuracy. Load distribution also has an important impact on rolling energy consumption, roll consumption, production process stability and operating rate and other indicators. Starting from the empirical table me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B37/20B21B37/58
CPCB21B37/20B21B37/58
Inventor 谭耘宇卞皓付文鹏
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD
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