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Method for realizing flow per second balance among hot rolling continuous mill stands through rolling mill speed compensation

A technology of speed compensation and hot continuous rolling mill, which is applied in the direction of mass flow control device, roll speed control, metal rolling, etc., can solve the problem of unbalanced amount of sleeves, etc., so as to reduce the number of large or unavailable sleeves and improve the The effect of rolling stability

Active Publication Date: 2015-09-02
科大集智数据科技(武汉)有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method only considers the unbalanced set amount caused by the impact speed drop, which has certain limitations

Method used

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  • Method for realizing flow per second balance among hot rolling continuous mill stands through rolling mill speed compensation
  • Method for realizing flow per second balance among hot rolling continuous mill stands through rolling mill speed compensation
  • Method for realizing flow per second balance among hot rolling continuous mill stands through rolling mill speed compensation

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Embodiment Construction

[0030] The specific implementation manners of the present invention will be described in detail below in conjunction with the accompanying drawings of the embodiments.

[0031] A method for realizing second flow balance between hot continuous rolling stands by rolling mill speed compensation, comprising the following steps:

[0032] S1. Acquisition of actual rolling data: after the threading of the head of the current coil is completed, the actual roll speed of each stand during the finishing rolling process of the head of the strip is collected from the first-level computer, and the speed of the roll after the looper control is started the amount of regulation;

[0033] After the strip head threading is completed, collect all kinds of actual rolling data from the first-level computer, including the roll speed of each stand Roll speed adjustment Δv required for looper control i , where i is the finishing stand number;

[0034] S2. Calculate the updated roll speed learning ...

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Abstract

The invention discloses a method for realizing flow per second balance among hot rolling continuous mill stands through rolling mill speed compensation, relates to the field of hot-rolling production process control, and aims to solve the problem of flow per second imbalance in the head wearing process of a hot rolling strip steel. The practical roll speed for finish rolling of each frame and the roll speed regulating quantity required by loop control is acquired from a level 1 computer according to the regulating process of the roll speed for finish rolling of each frame required by loop control in a threading process, specification-classifying self-adaptive learning is performed on the change rate of the roll speed required by the loop control according to steel type*thickness*frame, and the roll speed is corrected by adopting a latest learning coefficient during setting calculation of a next roll of strip steel in order that the flow per second among the finish-rolled frames tends to be balanced. By adopting the method, the phenomena of large loop rise or no loop rise, finish rolling steel scrap, width reduction and the like can be reduced, and the rolling stability of a finish rolling process is improved remarkably.

Description

technical field [0001] The invention relates to the field of production process control of hot-rolled strip steel, in particular to a method for realizing second flow balance between hot continuous rolling stands through rolling mill speed compensation. Background technique [0002] The looper is the most important control system to ensure the rolling stability of the hot continuous rolling finishing mill. During the strip threading process of finish rolling, the looper is in an open-loop state at the initial stage. In this state, the appropriate amount of loop is the most important factor to ensure the stability of the strip threading process of finish rolling. [0003] In the process of finish rolling and threading, the amount of loops is generated by the speed difference between the front and rear racks. The roll speed of the front and rear racks during strip threading is calculated by the hot continuous rolling process control system according to the second flow balance...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B37/46
CPCB21B37/46B21B2037/002
Inventor 李维刚周巍
Owner 科大集智数据科技(武汉)有限公司
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