Control method for full-automatically changing work roll of hot rolling finisher

Abstract

The invention relates to a method for controlling full automatic roll changing of a hog finishing mill. Hardware used by the method consists of a controller, a server, an operating computer and a roll changing bogie, wherein the server and the operating computer are connected with the controller respectively, and the controller controls operation of the roll changing bogie. The control method comprises the following steps in sequence: preparation of roll changing, disassembly of the prior working roll, assembly of a novel working roll, and preparation of steel rolling, wherein jacked pile position value E7 of the roll changing bogie on an upper working roll realizes relative position control by a self-adapting positioning method; the position value E7 is calculated by contact position value E9 of the roll changing bogie and a finishing machine frame minus 420 millimeters; and the contact position value E9 of the roll changing bogie and the finishing machine frame is obtained by judgment of the absolute position of the roll changing bogie before the finishing machine frame, the reference velocity, the actual velocity and the working current of a motor; and after automatic roll changing is subjected to manual interference, automatic roll changing is continuously completed by utilizing the breakpoint continuing function of an SFC module of programmed software P80i in the controller, and quick full automation of the roll changing process is realized.

Description

technical field [0001] The invention belongs to a control method for changing work rolls of a finishing mill in a hot continuous rolling production line of an iron and steel enterprise, in particular to a control method for fully automatic roll changing of a working roll of a hot rolling finishing mill. Background technique [0002] Hot rolling is a necessary process in the strip steel production chain of a modern steel mill. In the hot rolling production process, it is usually necessary to change the work rolls of the finishing mill for each batch of slabs rolled. Therefore, the replacement of work rolls is a hot The key link in the production process of continuous rolling line. With the improvement of the automation degree of hot continuous rolling, the rolling rhythm is gradually accelerated, and the replacement of work rolls in the finishing mill is becoming more and more frequent. It has reached 1 to 2 roll changes per production shift (8 hours). It can be seen that th...

AI Technical Summary

Problems solved by technology

It takes at least 20 minutes for each rack to automatically change rolls, plus the time for manual roll change, and it takes at least 30 minutes for 7 racks to change work rolls semi-automatically. Although the roll changing time is greatly reduced and the manpower is reduced, it is not fully automatic. Changing rolls is not the best way to change rolls

Images