Our rolling mills eccentricity

Analytics for US Patent No. 4222254, Gauge control …

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.

Technological control for cold rolling processes - ABB Ltd

ControlIT for Cold Rolling Mills Technological control for cold rolling processes Rolling of flat metal products is a complex proc-ess where the quality of the product is influenced

The Complete Technology Book on Hot Rolling of …

control system in cold mills, flat rolling practice cold rolling, pack rolling, steelmaking refractories, refining of stainless steels, special considerations in refining stainless steels etc. This book is a unique compilation and it draws together in a single source technical principles of steel making

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ward a new roll deformation model of four high hot rolling mills based on improved influence function method. In the new model, the roll bending calculation uses elastic beam method based on the mechanics of materials theory, which

Neural network for identification of roll eccentricity in ...

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.

Rolling mill roll eccentricity control - Kaiser Aluminum ...

Jul 04, 1989· 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 ...

Hot Rolling Mill Hydraulic Gap Control (HGC) …

P. Kucsera et al. Hot Rolling Mill HGC Thickness Control Improvement – 98 – Another way to determine the thermal expansion of the work roll is the modelling of the heat transfer between the work rolls and the strip.

9th INTERNATIONAL ROLLING MILL ACADEMY - isc-ltd.com

9th INTERNATIONAL ROLLING MILL ACADEMY 5-9 November 2007 - Glasgow, Scotland The lectures will be given ... contributions in Sendzimir mill modelling, backup-roll eccentricity control schemes, flatness control and recently robust multivariable control of hot mills…

Improvement of thickness tolerances in aluminium cold ...

Improvement of thickness tolerances for a two-stand aluminium cold rolling mill The implementation of additional control loops to compensate backup roll eccentricity and harmonic hardness variation allows a significant improvement in strip thickness performance.

US5181408A - Method of measuring and compensating roll ...

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 on-line eccentricity compensation method. The off-line eccentricity identification method is utilized for establishing an eccentricity vector which stores the ...

1328 The Open Automation and Control Systems …

In the rolling process, coiling eccentricity causes the cy- clical fluctuation of strip tension at mill entrance or exit side. In the constant speed rolling process, 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.

Solutions for cold rolling mills Technological controls ...

Solutions for cold rolling mills Technological controls for cold rolling processes Rolling of flat metal products is a complex process where the quality

IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS 1 Online ...

rolling mills. The roll eccentricity-induced disturbances can result in strip thickness deviation and product quality degradation, and the conventional control strategy cannot

Neural network for identification of roll eccentricity in ...

Abstract. 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.

hot rolling mill roll eccentricity - trackmedia.in

hot rolling mill roll eccentricity KraussMaffei Berstorff - Rubber technology High performance extruders and extrusion lines along the entire value added chain in the production of extruded rubber products.

Roll Eccentricity Control for Strip Rolling Mills ...

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.

LQG Regulation: Rolling Mill Case Study - MATLAB ...

The eccentricity disturbance is approximately periodic and its frequency is a function of the rolling speed. A reasonable model for this disturbance is a second-order bandpass filter driven by white noise.

US491098 - Method and apparatus for the detection and ...

The invention provides a new apparatus for the detection, measurement and display of roll and roll bearing eccentricity in a rolling mill, and also an apparatus for correction of such eccentricities. The apparatus comprises individual narrow band-pass filter modules, each dedicated to the detection and development of a signal corresponding to one eccentricity, such as fundamental back-up roll ...

Unwind/rewind eccentricity control for rolling mills ...

Mar 06, 1990· 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 bei

Intelligent Control of Aluminium Rolling Mills Using …

Aluminium rolling mill. Eccentricity effects are perhaps the most common manifestation of cyclic errors. Fig. 2 shows how those periodic errors might arise during the rolling process. Fig .2. Generation of periodic errors during the rolling process Here the workrolls are shown as being oval and the ...

Online Monitoring System Design for Roll Eccentricity in ...

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.

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

In rolling mill, the accuracy and quality of the strip exit hickness aret very important factors. To realize high accuracy in the strip exit thickness, the Automatic Gauge Control (AGC) system is used.

Control System for Tandem Cold Mills with Roll Eccentricity

Control System for Tandem Cold Mills with Roll Eccentricity ... in the cold-rolling mill process, the major ... 3.1 Effect of roll eccentricity In rolling processes, the non-uniformity of the ...

Techn Controls Rolling Mill | Rolling (Metalworking ...

Solutions for cold rolling mills Technological controls for cold rolling processes. Rolling of flat metal products is a complex process where the quality of the product is influenced by various factors like incoming material, mechanical and electrical equipment, lubrication and control strategies.

Cold Mill Systems | TMEIC

A Cold Mill rolls coils of pickled steel from the pickle line at ambient temperature, using coolant oil. The cold mill produces steel and stainless steel and is also used for aluminum, aluminum foil, and copper. There are several types of mills such as 2-High, 4-High, 6-High, 12-High, 20-High, and Sendzimir Mills that have a variety of types of flatness control operations.

1328 The Open Automation and Control Systems Journal, …

In the rolling process, coiling eccentricity causes the cy- clical fluctuation of strip tension at mill entrance or exit side. In the constant speed rolling process, the fluctuation cycle

Projects and Automation Solutions - Honeywell

Projects and Automation Solutions ... performance automation of aluminum rolling mills. Honeywell has combined entry and exit thickness measurements, Automatic Gauge Control (AGC), Hydraulic Gap Control (HGC) and other enhancements such as roll eccentricity compensation into a single integrated system with flexible configurations …

Technological control for cold rolling processes - …

ControlIT for Cold Rolling Mills Technological control for cold rolling processes Rolling of flat metal products is a complex proc-ess …

Introducing cold pilger mill technology - The Fabricator

Introducing cold pilger mill technology An overview of the equipment and the process. The Tube & Pipe Journal July/August 2006 July 11, 2006 By: Oliver Strehlau The cold mill pilgering process uses ring dies and a tapered mandrel to reduce tube cross sections by up to 90 percent.

Cold Mill Systems | TMEIC

A Cold Mill rolls coils of pickled steel from the pickle line at ambient temperature, using coolant oil. The cold mill produces steel and stainless steel and is also used for aluminum, aluminum foil, and copper. There are several types of mills such as 2-High, 4-High, 6-High, 12-High, 20-High, and Sendzimir Mills that have a variety of types of …

H∞ Control system for tandem cold mills with roll ...

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.