Title :
Hydraulic screwdown control system for mandrel mill
Author :
Matsuura, Takashi ; Shigematsu, Naoshi ; Nakashima, Kazuhiro ; Moribe, Kenji
Author_Institution :
Dept. of Plant Control Eng. & Maintenance, Sumitomo Metal Ind. Ltd., Wakayama, Japan
Abstract :
A hydraulic screwdown control system for the mandrel mill was successfully installed at Wakayama Steel Works of Sumitomo Metal Industries, Ltd., in April, 1989. The purpose of the control is to shape the tube ends in a thin tapered form. By applying this screwdown control, it is possible to eliminate end thickening in the reducer and to reduce the length of crop losses. This screwdown control system must respond rapidly without position offset error. Therefore, the following functions of the screwdown servo control were applied: (1) velocity feedforward compensation, (2) position offset compensation, (3) hydraulic pressure feedback compensation, (4) adaptive function of screwdown start time, and (5) application of an expert system
Keywords :
expert systems; feedback; hydraulic control equipment; metallurgical industries; servomechanisms; spatial variables control; steel industry; steel manufacture; Sumitomo Metal Industries; Wakayama Steel Works; adaptive function; crop losses reduction; expert system; hydraulic pressure feedback compensation; hydraulic screwdown control system; mandrel mill; position offset compensation; reducer end thickening elimination; screwdown servo control; screwdown start time; tube ends shaping; velocity feedforward compensation; Control systems; Crops; Error correction; Feedback; Metals industry; Milling machines; Servosystems; Shape control; Steel; Thickness control;
Journal_Title :
Industry Applications, IEEE Transactions on
