A method to realize the addition of stand-by stand after online roll change and roll withdrawal of ESP finishing mill

Abstract

The method disclosed a method for realizing the addition of a standby machine frame after the online roll replacement and withdrawal of an ESP finish rolling unit. According to the input rolling process and rolling mill parameters, each machine frame is required to be adjusted, and when the variable thickness points reach the standby machine frame, the standby machine frame pressed down and adjusted, and after the standby machine frame Fi is added for rolling, each machine frame at the downstream of the standby machine frame is adjusted, so that an abnormal-state four-machine-frame continuousrolling state is transited to a normal rolling state of the five-machine-frame. By establishing a dynamic mathematical model, the roller rotating speed and the roller gap of each stage in the roller changing process are adjusted, and the transition of the four-machine-frame abnormal-state rolling to the five-machine frame normal rolling is realized through the variable schedule of a product, and the adding process of the standby machine frame is completed on line on the premise of ensuring the stable rolling of a rolling mill, the continuity of an ESP production line is guaranteed, and the energy loss caused by shutdown is reduced. The method is also suitable for the ESP production line which is put into production, and has relatively high application value.

Description

technical field [0001] The invention relates to the field of metallurgical continuous casting and rolling, in particular to a method for realizing on-line roll change and roll withdrawal of an ESP finishing rolling unit and adding a stand-by stand. Background technique [0002] Hot-rolled thin strip steel can be used as finished products or raw materials for cold rolling, and its demand continues to grow worldwide. However, the traditional hot-rolled strip steel process has serious environmental pollution and huge energy consumption, which is not conducive to the construction of an energy-saving and environmentally friendly society. At present, the research hotspot at home and abroad is to develop thin slab continuous casting and rolling process, "replacing heat with cold" to produce thin-gauge slab products, so as to reduce energy consumption and environmental pollution. Endless Strip Production (ESP) is a cutting-edge technology in the field of short-process hot-rolled str...

AI Technical Summary

Problems solved by technology

However, since the products of the ESP production line are mainly thin-gauge plate and strip products, the roll wear of the finishing mill is very serious during the rolling process, and the roll change cycle is generally twice that of the conventional rolling roll change cycle. Produces thin gauge strip with high surface quality

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