Temperature difference control method for rolling pieces for steckel mill

Abstract

The invention discloses a temperature difference control method for rolling pieces for a steckel mill. The method includes steps of measuring initial temperature of the rolling pieces; calculating discharging target temperature value of a temperature complement furnace and heating the rolling pieces according to the target temperature value; calculating a set value of rolling speed of each rolling step and performing controlled rolling at each step according to the set value to reduce temperature difference; and measuring actual temperature of an exit and an entrance of a rolling mill and comparing the actual temperature with corresponding values to realize self-learning of the model and enhance calculating precision of the model. By the method, the temperature differences among the head, the middle and the tail of each rolling piece are reduced greatly, and rolling stability and quality of finished products and production ability of a production line are enhanced.

Description

technical field [0001] The invention relates to a control technology of a steel-steel rolling mill, and more specifically, relates to a method for controlling the temperature difference of a rolled piece of a steel-steel rolling mill. Background technique [0002] Steckel mill (STECKEL MILL), as one of the forms of hot strip rolling mill, has a history of more than 70 years since its birth. Over the years, through people's continuous improvement and improvement of the technology and equipment of the steckel mill, the steckel mill is recovering. Especially at present, iron and steel enterprises are under huge pressure from resources, environment and manufacturing cost, making the short-process production technology of the steckel mill further mature and practical. One of the technical advantages of the Steckel Mill is that the front and back of the rolling mill are equipped with coiling furnaces, which play the role of heat preservation. It is especially suitable for the pro...

AI Technical Summary

Problems solved by technology

This method cannot improve the temperature difference between the head, middle and tail of the strip in the actual use process, and it is easy to cause the expansion of the temperature deviation

[0005] To sum up, in the existing rolling process of the steel coil mill, due to the different thermal states experienced by the head, middle and tail of the rolled piece, there is a temperature difference between the head, tail and the middle of the strip. If this technical problem cannot be effectively solved, it will be It leads to abnormal fluctuation of rolling force, resulting in poor thickness accuracy; at the same time, it causes the deterioration of the plate shape at the head and tail, causing strip deviation during the rolling process, destroying rolling stability, and deteriorating product quality

Images