Thermal tandem rolling machine control device and thermal tandem rolling machine control method

Abstract

The invention provides a thermal tandem rolling machine control device which maximally exert equipment capability and suppress speed balance disorder between rolling frames in rolling, and a thermal tandem rolling machine control method. A thermal tandem rolling machine (151) is used as a control object, a structure which is described is adopted in the thermal tandem rolling machine control device (100) in which workpiece rollers (153) that are equipped in a plurality of rolling frames (152) continuously control rolling of a steel plate. The thermal tandem rolling machine control device aims at different risks of reaching an upper limit of a rolling speed according to steel plate characteristic and can set a speed allowance for each steel plate, thereby appropriating a maximal value of the rolling speed which can be set by setting operation. Hereon, preferably, when the rolling speed of a specific rolling frame (152) in rolling reaches the upper limit of the rolling speed, controlling is performed for reducing the rolling speed of each rolling frame (152), thereby minimizing speed balance disorder among the rolling frames (152).

Description

technical field [0001] The invention relates to a hot tandem rolling mill control device and a hot tandem rolling mill control method. Background technique [0002] In the hot tandem rolling mill, except that the rotational speed (hereinafter, simply referred to as "speed"), torque, and motor power of the work rolls of each rolling stand do not become too large, the Balance between control racks is also important. In particular, if the speed balance between the rolling stands is poor, the steel plate is sometimes loosened and sometimes tensed between the rolling stands, so that unstable rolling occurs and the quality of the steel plate deteriorates. In order to increase the throughput, it is necessary to increase the rolling speed to a high value, but if the speed and torque of a specific rolling stand are limited by the upper limit of the equipment during rolling, the speed balance among the rolling stands will collapse. , causing the above-mentioned problem. [0003] In...

AI Technical Summary

Problems solved by technology

In the method described in Patent Document 2, there is no description about taking this point into account, and it is not clear what to do when a specific motor becomes overloaded during rolling.

Images