rolling mill roll eccentricity control

rolling mill roll eccentricity control

Roll Eccentricity Control for Strip Rolling Mills ...

Jul 01, 1987  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 ...

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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 ...

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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 ...

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Roll Eccentricity Control by Using a Bandpass Filter ...

Sep 01, 2001  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.

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

Nov 12, 2013  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

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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

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H#x221E; Control system for tandem cold mills with roll ...

高达10%返现  In order to meet the requirement for higher thickness accuracy in cold rolling processes, it is strongly desired to have high performance in control units. To meet this requirement, we have considered an output regulating control system with a roll-eccentricity estimator for each rolling stand of tandem cold mills. Considering entry thickness variation as well as roll eccentricity as the

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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 ...

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

Nov 12, 2013  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

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US4905491A - Unwind/rewind eccentricity control for ...

A method of rolling material in a rolling mill in which the material is directed from an unwind coil of the material to the mill and/or to a rewind coil of the material from the mill, the material being under tension as it is directed to and from the mill. The directing process has at least one cyclic disturbance which ordinarily causes cyclic changes in the tension of the material and in the ...

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

DOI: 10.4236/ENG.2014.61005 Corpus ID: 30768077. Strip Thickness Control of Cold Rolling Mill with Roll Eccentricity Compensation by Using Fuzzy Neural Network @article{Hameed2014StripTC, title={Strip Thickness Control of Cold Rolling Mill with Roll Eccentricity Compensation by Using Fuzzy Neural Network}, author={W. I. Hameed and K. Mohamad}, journal={Engineering},

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CiteSeerX — ROLL ECCENTRICITY CONTROL WITH THE FORCE

Moreover an FFF installation requires only about nine (9) months after which time the System is fully operational at the specified gage performance. One of the factors responsible for this high level of gage control is the unique method by which the System deals with the problem of roll stack eccentricity. This paper describes that method.

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Polynomial LQG control of back-up-roll eccentricity gauge ...

Jun 01, 1994  The control of a rolling mill requires the output gauge to be regulated in the face of eccentricity and input hardness disturbances using measured roll-force. This is one of those control problems where it is not the measured variable which is controlled directly, but the measured variable is used to achieve control or regulation of another ...

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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.

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H#x221E; Control system for tandem cold mills with roll ...

In order to meet the requirement for higher thickness accuracy in cold rolling processes, it is strongly desired to have high performance in control units. To meet this requirement, we have considered an output regulating control system with a roll-eccentricity estimator for each rolling stand of tandem cold mills. Considering entry thickness variation as well as roll eccentricity as the major ...

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how to control eccentricity problem in hot rolling mill

how to control eccentricity problem in hot rolling mill. production planning and control in hot roll mill pdf. ABB drives and control system for hot rolling mills.

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

In this article the AGC (Automated Gauge Control) system, of a hot rolling mill is analyzed and different methods are described to improve its performance. The mill stretch compensation and other disturbances during the rolling process are

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Technological Controls for Cold Rolling Mill - ABB

• Speed feed-forward control • Roll eccentricity control • Tension feed-forward control Thickness feedback control The basic control strategy is thickness feedback (monitor control) based on the measured thick - ness deviation at the exit side of the mill. The delay time, transport of the strip from the

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The Engineering Design of Rolling Mill - AL Alluminio e Leghe

Oct 04, 2019  A Foil Rolling Mill rolls, in subsequent long passes(due to the relative thin material), coiled strip (coiled on steel spool) from a thickness of up to 0.6 mm (coming from Cold rolling Mill) down to 2 x 5 µm; the mill is designed in order to roll in closed gap.

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Technological control for cold rolling processes ...

Jun 25, 2018  The basic control strategy is thickness feedback (monitor control) based on the measured thickness deviation at the exit side of the mill. The delay time, transport of the strip from the roll gap to the thickness gauge, essentially determines the control system's dynamic response, particular at a low rolling speed.

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Strip Mills – AR GROUP OF INDUSTRIES

Roll eccentricity compensation. 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.

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US4222254A - Gauge control using estimate of roll ...

A method of controlling a rolling mill in which eccentricity of the roll assemblies of the mill and variations in the thickness and/or hardness of material entering the mill ordinarily adversely affect the gauge of the material leaving the mill. The method involves the steps of slowly eliminating the cyclic effects of roll eccentricity on the exit gauge of the material while simultaneously ...

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how to control eccentricity problem in hot rolling mill

how to control eccentricity problem in hot rolling mill. production planning and control in hot roll mill pdf. ABB drives and control system for hot rolling mills.

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A Robust Data-Driven Fault Detection Approach for Rolling ...

Oct 04, 2019  This brief proposes a robust subspace-aided fault detection approach for rolling mill processes with roll eccentricity. The novelty of this brief relies on the closed-loop identification of the so-called data-driven realization of the stable kernel representation (SKR) of the rolling mill process. In order to ensure an accurate and robust closed-loop identification, the mappings among the ...

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Roll Eccentricity Phase Identification System Scientific.Net

Roll eccentricity signal is difficult to directly measured, should fuse many kinds of detectable signal to be extracted through the data analysis which includes rolling force, roll gap, incoming thickness of rolled piece, exit thickness, tension, and so on. This paper puts the four high mill as an object, according to the influence of the main ...

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Technological Controls for Cold Rolling Mill - ABB

• Speed feed-forward control • Roll eccentricity control • Tension feed-forward control Thickness feedback control The basic control strategy is thickness feedback (monitor control) based on the measured thick - ness deviation at the exit side of the mill. The delay time, transport of the strip from the

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The Complete Technology Book on Hot Rolling of Steel

Rolling mills perform the function to reform the metal pieces such as billet and ingot whilst maintaining its well equipped micro structure into bar, wire, sheet, strip, and plate. ... Roll Eccentricity Control Methods Passive roll eccentricity control methods Active roll eccentricity control methods Preventive roll eccentricity control methods

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Strip Mills – AR GROUP OF INDUSTRIES

Roll eccentricity compensation. 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.

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A SURVEY OF THE LOOPER-TENSION CONTROL

CONTROL TECHNOLOGY IN HOT ROLLING MILLS ... set–up mismatch, skid marks, roll eccentricity and so on. However, while the hydraulic screw down system makes it possible to give quicker response to the AGC, it often creates a disturbance to the tension control system because of the mass flow

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Upgrading of Hot Finishing Mill to 4-Stands, and ...

Crown control actuator settings PSC5: Roll eccentricity elimination control PC1: Rougher master, table master PC2: Rougher sub-machine control master PC3: Machines around rougher mill control master, Automatic gauge control PC4: Slab cooling temperature control Figure 2 Configuration of computer control system for hot strip rolling mill Roll ...

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The Engineering Design of Rolling Mill - AL Alluminio e Leghe

Oct 04, 2019  A Foil Rolling Mill rolls, in subsequent long passes(due to the relative thin material), coiled strip (coiled on steel spool) from a thickness of up to 0.6 mm (coming from Cold rolling Mill) down to 2 x 5 µm; the mill is designed in order to roll in closed gap.

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Shape Control in Cluster Mills - Rolling Mill Technology ...

The first mill of this type was built for the Kinuura Works of Nippon Metal Company. It had a ZR 21-AN mill section with a very small diameter work roll (65 mm). The net result was that the mill was able to take reductions of over 20% per pass on austenitic stainless steel and to keep the strip shape sufficiently flat to obtain good rolling.

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hot rolling mill roll eccentricity in haiti

hot rolling mill roll eccentricity in haiti. Roll Eccentricity Control for Strip Rolling Mills,Jul 01 1987 Typically the number of backup roll cycles is as shown in Table I TABLE 1 TYPICAL BACKUP ROLL CYCLES FOR DIFFERENT MILL TYPES MILL TYPE srAND PRODUCT NUMBER OF THICKNESS BACKUP ROLL mm CYCLESPRODUCT Tandem cold mill First 03 100400 Tandem hot mill First 25 1025 Last 25 50200 Plate mill ...

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Cold rolling mill process flow chart

Strip Thickness Control of Cold Rolling Mill with Roll Eccentricity ... Dec 19, 2013 ... In rolling mill, the accuracy and quality of the strip exit thickness are very important factors. ... description of the cold rolling process is presented. In ... flow stress avg. Y .... The block diagram of exit thickness control with roll

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Rolling Mill Academy – Advanced Control Technology Training

Industrial Control Centre, University of Strathclyde: Prof. Mike Grimble has a long track record in fundamental contributions to optimal robust control and has over the years made significant contributions in Sendzimir mill modeling, backup-roll eccentricity control schemes, flatness control and recently robust multivariable control of hot mills.

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