rolling mill roll eccentricity control

Roll Eccentricity Control for Strip Rolling Mills ...

1987-7-1 · Awtm/ia Abstract: An in-depth review of the roll eccentricity control design problem is prov­ided which encompasses a number of recent, novel, design contributions and includes experimental results from two separate steel, tandem cold rolling mill installations. A unifying approach to eccentricity control ~nables the diverse range of published ...

Rolling mill roll eccentricity control - Kaiser Aluminum ...

The invention relates to the control of rolling mill backup roll eccentricity by combining the load carrying characteristics of rolling mill tapered roller bearing assemblies during rolling with prescribed levels of axial thrust to effect a controlled deflection of backup roll necks on a 4-high rolling mill or the like due to the selected thrust force applied axially to the ends or necks of ...

Roll Eccentricity Control for Strip Rolling Mills ...

Roll Eccentricity Control for Strip Rolling Mills. Author links open overlay panel W.J. Edwards * P.J. Thomas * G.C. Goodwin **. Show more

Strip Thickness Control of Cold Rolling Mill with Roll ...

2013-11-12 · Strip Thickness Control of Cold Rolling Mill with Roll Eccentricity Compensation by Using Fuzzy Neural Network Waleed I. Hameed, Khearia A. Mohamad Department of Electrical Engineering, University of Basrah, Basrah, Iraq . Email: [email protected] Received November 12, 2013; revised December 12, 2013; accepted December 19, 2013

Roll Eccentricity Control Using Identified Eccentricity of ...

Roll eccentricity is a periodic disturbance caused by a structure of back up rolls in rolling mills, and it affects product thickness accuracy. It cannot be measured directly by sensors, so it should be identified by measured thickness or measured roll force. When there is a large difference of diameters between top and bottom back up roll, the performance of roll eccentricity control using ...

Roll Eccentricity Control by Using a Bandpass Filter ...

2001-9-1 · Thickness deviations of the steel plates in the rolling mill process is mainly caused by the roll eccentricity of the back up roll (BUR). In this paper, a bandpass filter with high gain in the given frequency is introduced which is able to overcome the roll eccentricity of BUR and is very simple compared with other roll eccentricity control (REC) methods.

Unwind/rewind eccentricity control for rolling mills ...

Roll eccentricity control system for a rolling apparatus: 1985-10-08: Yamaguti et al. 72/8: 4531392: Phase compensator for gauge control using estimate of roll eccentricity: 1985-07-30: Puda: 72/10: 4222254: Gauge control using estimate of roll eccentricity: 1980-09-16: King, Jr. et al. 72/8: 4173133: Continuous rolling mill: 1979-11-06: Imai ...

Online Monitoring System Design for Roll Eccentricity in ...

2015-6-5 · Abstract: This paper deals with the parameter estimation and online monitoring of roll eccentricity in rolling mills. Roll-eccentricity-induced disturbances can result in strip thickness deviation and product quality degradation, and a conventional control strategy cannot regulate this kind of periodic disturbances due to its complex characteristics.

Neural network for identification of roll eccentricity in ...

1996-6-15 · The roll eccentricity in a rolling mill may define the limit of achievable thickness tolerances and thus is subject of interest for the automation equipment in hot rolling mills as well as in cold rolling mills. Today's demand on thickness tolerances less than 0.8% require efficient methods for roll eccentricity identification and compensation.

Technological control for cold rolling processes

2021-2-16 · Roll eccentricity control Irregularities in roll geometry cause periodic varia-tions in the roll gap, which can lead to variations in thickness of the rolled product. The predominant sources of these variations are the backup rolls of the stand. The function compensates for periodic disturbance from geometric asymmetries on the backup rolls. An

Roll Eccentricity Control for Strip Rolling Mills ...

Roll Eccentricity Control for Strip Rolling Mills. Author links open overlay panel W.J. Edwards * P.J. Thomas * G.C. Goodwin **. Show more

Active compensation of roll eccentricity in rolling mills ...

On the practical model of Cold-rolling Mill of 300, this paper establishes eccentricity compensation control practice of Cold-rolling Mill of 300 which applies wavelet transform method.

Unwind/rewind eccentricity control for rolling mills ...

Roll eccentricity control system for a rolling apparatus: 1985-10-08: Yamaguti et al. 72/8: 4531392: Phase compensator for gauge control using estimate of roll eccentricity: 1985-07-30: Puda: 72/10: 4222254: Gauge control using estimate of roll eccentricity: 1980-09-16: King, Jr. et al. 72/8: 4173133: Continuous rolling mill: 1979-11-06: Imai ...

Eccentricity and hardness control in cold rolling mills ...

Eccentricity and hardness control in cold rolling mills with a dynamically constructed neural controller Frayman, Y. and Rolfe, B.F. 2003, Eccentricity and hardness control in cold rolling mills with a dynamically constructed neural controller, in IPMM 2003 : Intelligence in a small materials world : selected papers from the Fourth International Intelligent Processing and Manufacturing of ...

H∞ Control system for tandem cold mills with roll

To meet this requirement, an output regulating control system with a roll-eccentricity estimator for each rolling stand of tandem cold mills was considered. Assuming entry thickness variation as ...

Active compensation of roll eccentricity in rolling mills ...

Abstract: This paper is concerned with the active compensation of the roll-eccentricity-induced periodic disturbances in the strip exit thickness of hot and cold rolling mills. The roll eccentricity may be caused by different reasons, e.g., inexact roll grinding or nonuniform thermal expansion of the rolls. The increasing demands on the thickness tolerances require new methods for the active ...

Online Monitoring System Design for Roll Eccentricity in ...

2015-6-5 · Abstract: This paper deals with the parameter estimation and online monitoring of roll eccentricity in rolling mills. Roll-eccentricity-induced disturbances can result in strip thickness deviation and product quality degradation, and a conventional control strategy cannot regulate this kind of periodic disturbances due to its complex characteristics.

Online Monitoring System Design for Roll Eccentricity in ...

Abstract — This paper deals with the parameter es-. timation and online monitoring of roll eccentricity in. rolling mills. The roll eccentricity -induced disturbances. can result in strip t ...

Method of measuring and compensating roll eccentricity

Method of measuring and compensating roll eccentricity of a rolling mill. United States Patent 5181408. Abstract: A method of correcting the thickness variations of a rolling plate by controlling at least one of the top or bottom backup rolls of a rolling mill. The method further comprises an off-line eccentricity identification method, and an ...

A BASIC UNDERSTANDING OF THE MECHANICS OF

2003-10-15 · on wear is another issue. Stresses from Hertzian pressure in 4-high cold mill back up rolls were measured years ago, the results were never published, but of high interest - also, maybe later. K. H. Schröder July 2003 K. H. Schröder: A BASIC UNDERSTANDING OF THE MECHANICS OF ROLLING MILL ROLLS File: SCHROEDER_ROLLS_010703.DOC

Roll eccentricity compensation control for strip rolling ...

Roll eccentricity compensation control for strip rolling mills based on wavelet packet de-noising theory Abstract: This study seeks to improve the strip thickness accuracy by adding filter and compensator in strip rolling mills. Based on wavelet packet de-noising theory, this paper designed a wavelet packet analyzer of roll eccentricity (WPARE ...

Unwind/rewind eccentricity control for rolling mills ...

Roll eccentricity control system for a rolling apparatus: 1985-10-08: Yamaguti et al. 72/8: 4531392: Phase compensator for gauge control using estimate of roll eccentricity: 1985-07-30: Puda: 72/10: 4222254: Gauge control using estimate of roll eccentricity: 1980-09-16: King, Jr. et al. 72/8: 4173133: Continuous rolling mill: 1979-11-06: Imai ...

H∞ Control system for tandem cold mills with roll

To meet this requirement, an output regulating control system with a roll-eccentricity estimator for each rolling stand of tandem cold mills was considered. Assuming entry thickness variation as ...

Eccentricity and hardness control in cold rolling mills ...

Eccentricity and hardness control in cold rolling mills with a dynamically constructed neural controller Frayman, Y. and Rolfe, B.F. 2003, Eccentricity and hardness control in cold rolling mills with a dynamically constructed neural controller, in IPMM 2003 : Intelligence in a small materials world : selected papers from the Fourth International Intelligent Processing and Manufacturing of ...

Gauge control using estimate of roll eccentricity ...

BACKGROUND OF THE INVENTION. The present invention relates generally to the control of rolling mills, and particularly to a method of reducing cyclic effects on the gauge of material rolled in a mill caused by eccentric roll assemblies of the mill while simultaneously and transiently controlling and offsetting the effects of incoming variations in thickness and/or hardness of material on the ...

Active compensation of roll eccentricity in rolling mills ...

Abstract: This paper is concerned with the active compensation of the roll-eccentricity-induced periodic disturbances in the strip exit thickness of hot and cold rolling mills. The roll eccentricity may be caused by different reasons, e.g., inexact roll grinding or nonuniform thermal expansion of the rolls. The increasing demands on the thickness tolerances require new methods for the active ...

Online Monitoring System Design for Roll Eccentricity in ...

2015-6-5 · Abstract: This paper deals with the parameter estimation and online monitoring of roll eccentricity in rolling mills. Roll-eccentricity-induced disturbances can result in strip thickness deviation and product quality degradation, and a conventional control strategy cannot regulate this kind of periodic disturbances due to its complex characteristics.

how to control eccentricity problem in hot rolling mill

Roll Eccentricity Control for Strip Rolling Mills. 1987-7-1 Awtm/ia Abstract: An in-depth review of the roll eccentricity control design problem is prov­ided which encompasses a number of recent, novel, design contributions and includes experimental results from two separate steel,

Hot Rolling Mill Hydraulic Gap Control (HGC) thickness ...

2015-11-4 · 1.2 Lock-on Type Gauge Control Under steady state rolling conditions, a linear relationship between the exit strip thickness, roll gap, and rolling force can be expressed by spring equation Eq. (1): M F h S 0 0 (1) where S 0 is unloaded roll gap; F 0 is rolling force; M is the mill stiffness or mill modulus.

A BASIC UNDERSTANDING OF THE MECHANICS OF

2003-10-15 · on wear is another issue. Stresses from Hertzian pressure in 4-high cold mill back up rolls were measured years ago, the results were never published, but of high interest - also, maybe later. K. H. Schröder July 2003 K. H. Schröder: A BASIC UNDERSTANDING OF THE MECHANICS OF ROLLING MILL ROLLS File: SCHROEDER_ROLLS_010703.DOC