Active control system of mill products tension at the outlet of roughing train in continuous light-section mill

Kuzmenko, M.; Rybalchenko, М.; Boyko, O.; Beshta, D.

Purpose. To find the regularities that provide control of interstand force in the roughing train. Methodology. The methodology for solving the problem of control of interstand forces in a roughing train is based on the estimation of the change in the controller output of deflection/loop tension of the rolled product, which will ensure the stability of the cross-sectional dimensions of the rolled product at the outlet of the roughing group. Findings. The work deals with an issue of decreasing gage interference of bar section by controlling speed rate of rolling in a roughing train. A method for controlling the interstand force in the roughing train based on the analysis of a low-frequency component of disturbance which occurs during automatic stabilization of free deflection/loop in the finishing train is substantiated and tested. The proposed system of active control of rolling tension enables to stabilize the transverse dimensions of mill bar before the finishing train. The research results have shown that the ultimate objective function of interstand forces control in the roughing trains is to minimize the scattering of dimensions of the rolled product at the outlet of the roughing trains. Active regulation of the rolling tension for stabilizing the cross-sectional dimensions of the rolled product at the roughing train outlet is rationally carried out using program control for the rolling speed rate in the first interstand space of the finishing train. Originality. General regularities that provide the interstand force identification through the change of the regulator outlet of the rolling deflection/loop were determined. Practical value. The organization of interstand force control in the roughing train after the obtained dependencies allows stabilizing the cross-sectional dimensions of the rolled product in the finishing train.


	Наукова періодика України		Naukovyi visnyk Natsionalnoho Hirnychoho Universytetu