A control method for preventing a mill frame from running off-center during a finish rolling process

By monitoring rolling force deviation in real time and automatically adjusting the roll gap on one side of the mill, the problem of mill stand deviation during finishing rolling was solved, automatic leveling was achieved, manual intervention was reduced, and rolling stability and quality were improved.

CN115193925BActive Publication Date: 2026-02-03BAOSTEEL ZHANJIANG IRON & STEEL CO LTD
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Patent Information

Application Number
CN202210655542.7
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-06-10
Publication Date
2026-02-03
Estimated Expiration
2042-06-10

AI Technical Summary

Technical Problem

The lack of direct testing equipment and automatic control methods in the finishing rolling process makes it difficult to control the shape of the strip between stands. The lack of timely manual intervention leads to instability in the rolling process and an increase in the number of times scrap steel deviates from its intended path.

Method used

By monitoring the rolling force deviation in real time and calculating the difference between the stable rolling force deviation and the real-time rolling force deviation, the roll gap on one side of the mill is automatically adjusted to prevent deviation, reduce manual intervention, and improve rolling stability.

Benefits of technology

It achieves automatic leveling in the finishing rolling process, reduces manual labor load, and improves the stability and quality of the rolling process.

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Abstract

The application discloses a control method for preventing deviation of a rack in a finishing rolling process, which comprises the following steps: locking a rolling force deviation in a period after a head is rolled out at a fixed time as a stable rolling force deviation value, determining a real-time value of the rolling force deviation in a subsequent rolling process, calculating a difference value between the real-time value of the rolling force deviation and the stable rolling force deviation value until a flying shear cuts a tail, and automatically calculating a single-side roll gap leveling of a rolling mill according to a change of the difference value, so as to realize automatic leveling and deviation prevention in the finishing rolling process. The control method reduces manual intervention, reduces labor operation load, and improves stability and quality of the finishing rolling.
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