Cold continuous rolling mill starting control optimization method and device

Abstract

The invention provides a cold continuous rolling mill starting control optimization method and device. The method comprises the following steps that a first rolling force parameter corresponding to strip steel with the target thickness is set for a rolling mill according to the strip steel with the target thickness needing to be rolled; rolling mill starting is carried out according to a preset initial rolling force parameter and the first rolling force parameter; according to tension data between adjacent machine frames of the rolling mill and a preset first judgment condition, a second rolling force parameter is obtained; when the thickness of the strip steel at an outlet of each machine frame in the rolling mill meets a second judgment condition, the rolling speed of the rolling mill isincreased; and then, the roll bending force of a working roller and a middle roller of the tail machine frame of the rolling mill is adjusted until the deviation between the thickness of the strip steel at the outlet of the tail machine frame and the target thickness meets a preset error condition, and a final rolling force parameter is obtained according to the second rolling force parameter andthe parameter which is being used by the rolling mill. According to the method and the device, the control precision of the rolling mill can be greatly improved, and the success rate of starting rawmaterial plates of new type of steel is improved.

Description

technical field [0001] The invention relates to the technical field of rolling technology, in particular to a method and device for optimizing start-up control of a cold tandem rolling mill. Background technique [0002] When the rolling mill of the acid rolling mill is trial-producing a new steel grade for the first time, it is extremely critical to start the raw material plate. Raw material plate starting refers to rolling from the thickness of hot-rolled raw materials to the target thickness of cold-rolled finished products. The success or failure of the new steel grade raw material plate starting determines the success or failure of the new steel grade trial production. If the raw material plate of the new steel type fails to start, it means the failure of the trial production of the new steel type, which will cause the equipment of the acid rolling line to be idle, and the maximum capacity of the line cannot be exerted, and the depreciation cost per ton of steel and pr...

AI Technical Summary

Problems solved by technology

If the raw material plate of the new steel type fails to start, it means that the trial production of the new steel type has failed, which will cause the equipment of the acid rolling line to be idle, and the maximum capacity of the line cannot be exerted, and the depreciation cost per ton of steel and production costs cannot be effectively reduced.

[0003] At present, the optimization and control of raw material slabs are not ideal, and the control accuracy is low, which may easily lead to the failure of starting raw material slabs of new steel types, resulting in waste of resources and high equipment idle rate

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