Modernization of the hot plate rolling mill thickness control system using hydraulic gap control cylinders

2017 ◽  
Author(s):  
Stanislav S. Voronin ◽  
Vadim R. Gasiyarov
Keyword(s):  
Control System ◽  
Rolling Mill ◽  
Hot Plate ◽  
Thickness Control ◽  
Plate Rolling ◽  
Gap Control

scholarly journals The Work Roll Bending Control System of the Hot Plate Rolling Mill

2015 ◽  
Vol 129 ◽  
pp. 37-41 ◽  
Author(s):  
E.A. Maklakova ◽  
A.S. Maklakov ◽  
V.R. Gasiyarov ◽  
S.S. Voronin
Keyword(s):  
Control System ◽  
Rolling Mill ◽  
Work Roll ◽  
Hot Plate ◽  
Plate Rolling ◽  
Roll Bending

scholarly journals Development of an Automatic Elastic Torque Control System Based on a Two-Mass Electric Drive Coordinate Observer

Machines ◽  
2021 ◽  
Vol 9 (12) ◽  
pp. 305
Author(s):  
Andrey A. Radionov ◽  
Alexandr S. Karandaev ◽  
Vadim R. Gasiyarov ◽  
Boris M. Loginov ◽  
Ekaterina A. Gartlib
Keyword(s):  
Control System ◽  
Literature Review ◽  
Control Systems ◽  
Electric Drive ◽  
Rolling Mill ◽  
A Priori ◽  
Torque Control ◽  
Mass System ◽  
Loop Control ◽  
Plate Rolling

Development of control system based on digital twins of physical processes is a promising area of research in the rolling industry. Closed-loop control systems are developed to control the coordinates of two-mass electromechanical systems in order to limit the dynamic loads on the equipment of main rolling lines. These control systems are based on observers (digital shadows) that indirectly detect (reconstruct) the roll speed and the elastic torque of the shaft (spindle) in real time. Notably, observers are required to work fast in order to reconstruct transients attributable to shock (impact) loads. Literature review shows that the known observers, which use complex algorithms to compute coordinates, do not respond fast enough. The paper analyzes the kinematic diagram of Mill 5000, a plate rolling mill. It presents oscillograms that prove that the elastic torque does oscillate as the rolls grip the strip dynamically. The authors hereof have developed an observer that reconstructs the coordinates of the uncontrolled mass (the shaft) and the spindle torque from the parameters of the controlled mass, namely the torque and speed of the motor. The paper further rationalizes an approach that consists of simulating the processes on a model to further directly configure them on the object. The authors analyze the transients of the reconstructed two-mass system coordinates, which are associated with the rolls gripping the strip. The paper compares data against oscillograms recorded on the mill itself. The accuracy is satisfactory. The proposed observer has been used to developed a three-loop automatic speed control system for the uncontrolled mass. Controller configurations are substantiated. The paper shows coordinates obtained by simulation modeling as functions of time. It further presents experiments run on Mill 5000; the conclusions are that the amplitude and oscillations of the elastic torque drop significantly. The paper concludes with recommendations on industrial adoption of the observer and the novel electric drive coordinate control system. Study presented herein substantiates and implements a concept of developing algorithms that solve specific problems and are readily implementable on the existing equipment without need for additional computing devices. The contribution of the paper consists of stating and solving the problem of developing and testing an automatic elastic torque control system for the shaft of a heavy-duty rolling mill. This system has been implemented in the form of algorithms that run in the software of the existing industrial controllers (PLCs). It is simple and performs well. It does not need additional sensors or computers to be implemented, nor does it rely on complex computational algorithms. Such algorithms are based on computational tables that require a priori data on numerous process parameters. In our literature review, we have not come across any industrial implementation of such algorithms on hot-rolling mills.

Digital Automation and Control System for Plate Rolling Mill

1983 ◽  
Vol 16 (15) ◽  
pp. 629-632
Author(s):  
P. Lankinen ◽  
R. Peltonen ◽  
T. Pahlman
Keyword(s):  
Control System ◽  
Rolling Mill ◽  
Plate Rolling ◽  
Automation And Control ◽  
And Control

scholarly journals Development of Digital Control Algorithms for the Mechatronics System Drives of Reversing Plate Mill Stands

2021 ◽  
Vol 21 (1) ◽  
pp. 122-140
Keyword(s):  
Control System ◽  
Position Control ◽  
Control Channel ◽  
Control Algorithms ◽  
Plate Mill ◽  
Thickness Control ◽  
Automatic Gauge Control ◽  
Gap Control ◽  
Mill Stand ◽  
Roll Gap

Expanding the plate mill product range implies the improvement of control algorithms for the mechatronics control system drives of the reversing stands. The most important objectives include increasing the accuracy of geometric dimensioning and tolerancing, as well as improving the profile and surface flatness of rolled pro­ducts. The structure explaining the automatic ROLL-GAP CONTROL concept is provided, which allows controlling the thickness and gap between SMS-Demag AG rolls. This concept is implemented in the '5000' mill stand of Magnitogorsk Iron and Steel Works. The structural diagram of the automatic gauge control system (AGS) is presented. The functional diagram of the hydraulic gap control (HGC) system is presented, which includes a fast proportional control channel and a relatively slow integral position control channel. The principle of automatic thickness control is discussed, implemented in the automatic gauge control (AGC) system of the mill stand TCS controller. The diagram and dependences are prepared for the calculation of the nonlinear thickness controller parameters. The functions of the RAC regulator are described, intended for compensation of the tensile difference (gap spacing) at the mill stand sides. The dynamic impact compensation system functions are considered. The removal of the roll bending and deformation control signals is substantiated. The disadvantages of AGC are noted for sheets with a thickness below 10 mm. The most dangerous case is the tearing of metal fragments from the rear sheet side caused by the incorrect operation of the gauge control system. A method for hydraulic gap control is proposed based on the fast increase of the roll gap in the rear part of the rolled sheet during the last passage when rolling thin sheets. The results of experimental studies made on the '5000' mill are presented. The efficiency of the proposed control method has been confirmed. The oscillograms of signals are presented characterizing thickness variations. HGC and AGC systems with the proposed adjustments are proven to provide high-accuracy hydraulic position control and thickness control along the sheet length and width.

scholarly journals Stability Analysis of Roll Gap Control System on Rolling Mill in Non-Rolling State.

2000 ◽  
Vol 66 (643) ◽  
pp. 759-764
Author(s):  
Yasunobu HAYAMA ◽  
Jyunichi NISHIZAKI ◽  
Yohji TERAMOTO ◽  
Akira MOHRI
Keyword(s):  
Control System ◽  
Stability Analysis ◽  
Rolling Mill ◽  
Gap Control ◽  
Roll Gap
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