Plastic coefficient on-line calculation method for hot rolling

Chunyu He, Zhijie Jiao, Di Wu 

The State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110004, China

Aiming at the requirement of the high precision rolled piece plastic coefficient in the hot rolling process, this paper puts forward an on-line calculation method for the plastic coefficient. Based on the rolling mechanism model and fitting the plastic curve by the quadratic curve, the paper is to solve the tangency at the rolling pressure point, which is the plastic coefficient. The plastic coefficient calculation method exploited in the paper could be embedded in the basic automation directly before the calculation of the automatic gauge control (AGC) regulation quantity. According to the changes of the rolling force and the roll gap, the method can make the correction computation on the plastic coefficient, so as to improve the thickness compensation accuracy of the AGC system.