hot rolling mill roll eccentricity - Stone Crushing Equipment

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hot rolling mill roll eccentricity - Grinding Mills Category

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hot rolling mill roll eccentricity Description

equipment rolling mill roll eccentricity ntrol

15 jun 1996 the roll eccentricity in a rolling mill may define the limit of achievable thickness for the automation equipment in hot rolling mills as well as in cold rolling mills. r. isermann, k. lachmann, d. matkoadaptive control systems. rolling - primetals technologies ness wedge of the rolled product without strip-steering control. lateral displacement i think that machine learning in ...

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Rolling of steel in Hot Strip Mill – IspatGuru

Hot strip mills in these days are either conventional hot strip mills or strip mills for rolling thin slabs. The primary function of the conventional hot strip mill (HSM) is to reheat the semi-finished steel slabs (rolled or continuously cast) to the rolling temperatures and then to roll them thinner and longer through a series of rolling mill stands driven by large motors and finally coiling ...

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US3543549A - Rolling mill control for …

Method of controlling roll eccentricity of rolling mill and apparatus for performing the same method WO1985000998A1 (en ... Process and apparatus for eliminating the excentricity effect of rollers in hot and cold rolling mills for metal sheets : Cited By (26) * Cited by examiner, † Cited by third party; Publication number Priority date Publication date Assignee Title; US3926024A (en) * 1969 ...

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Online Eccentricity Monitoring Weihong Guo of Seamless ...

Online Eccentricity Monitoring of Seamless Tubes in Cross-Roll Piercing Mill Wall-thickness eccentricity is a major dimensional deviation problem in seamless steel tube production. Although eccentricity is mainly caused by abnormal process conditions in the cross-roll piercing mill, most seamless tube plants lack the monitoring at the hot piercing stage but only inspect the quality of ...

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hot rolling mill roll eccentricity - BINQ Mining

20.12.2012· et al. Roll eccentricity control for strip rolling mills (1987): This paper describes a controller design for a hot rolling mill.The main purpose of the algorithm is to improve the control of the cross-width thickness prole of …

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Active compensation 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 ...

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Hot Rolling Mill - YouTube

23.04.2012· (Roll forming: ) This film takes you through the processes within a hot rolling mill. You'll get to see the different stages all t...

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Roll Eccentricity Extraction Method Based on …

Roll eccentricity is ubiquitous in strip mills, which has a periodic impact on the strip thickness difference. Roll eccentricity compensation is an important part of the automatic gauge control system. Most roll eccentricity compensations extract the roll eccentricity based on the frequency domain analysis of the rolling force. It is difficult ...

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Rolling processes - Al-Mustansiriya University

Hot-rolled metal is generally free of residual stresses, and its properties are isotropic. Disadvantages of hot rolling are that the product cannot be held to close tolerances, and the surface has a characteristic oxide scale. Steelmaking provides the most common application of rolling operations. Figure (5-2) illustrates the sequence of steps in a steel rolling mill to show the variety of ...

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FAULT DIAGNOSIS OF ROLL SHAPE UNDER THE SPEED CHANGE …

Keywords: Diagnosis, Eccentricity, Fast Fourier Transform (FFT), Rolling force, Roll Shape Fault. 1. INTRODUCTION among rolling force model, rolling mechanism, and The continuous processing systems such as multi-stand hot rolling systems generally consist of various components like driven rolls, idle rolls, sensors. In the rolling system, a ...

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HKU Scholars Hub: A roll eccentricity sensor for …

The problem of roll eccentricity compensation in steel-strip rolling mills is examined. A novel roll eccentricity sensor is proposed for the task of retrieving the desired reference signal from the available roll-force measurement. The sensor implements a modified comb filter structure which can be arranged in either tunable or adaptive form. Simulation results based on typical experimental ...

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FAULT DIAGNOSIS OF ROLL SHAPE UNDER THE SPEED CHANGE …

Keywords: Diagnosis, Eccentricity, Fast Fourier Transform (FFT), Rolling force, Roll Shape Fault. 1. INTRODUCTION among rolling force model, rolling mechanism, and The continuous processing systems such as multi-stand hot rolling systems generally consist of various components like driven rolls, idle rolls, sensors. In the rolling system, a ...

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

12.11.2013· Cold Rolling Mill; Thickness Control; Roll Eccentricity; Fuzzy Neural Network; Eccentricity Compensation 1. Introduction Rolling strip is widely used for automobile manufactur-ing, food packaging, electric appliances, ma-chinery, light industry, instruments, communications, mil-itary affairs and other fields [1]. The design of a control-ler in the cold rolling system that can …

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Roll Eccentricity Phase Identification System | …

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 factors of roll eccentricity ——backup-roll ...

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Improvement of thickness tolerances in …

The analysis of a two-stand aluminium cold rolling mill has shown that process-related disturbances such as backup roll eccentricities and harmonic strip hardness variations can make it difficult to meet the target thickness tolerance. Backup roll eccentricity is not only the result of grinding and roll assembly tolerances, but can also be thermally induced during work roll changes and other ...

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US3543549A - Rolling mill control for …

Method of controlling roll eccentricity of rolling mill and apparatus for performing the same method WO1985000998A1 (en ... Process and apparatus for eliminating the excentricity effect of rollers in hot and cold rolling mills for metal sheets : Cited By (26) * Cited by examiner, † Cited by third party; Publication number Priority date Publication date Assignee Title; US3926024A (en) * 1969 ...

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Advanced Reversing Cold Mills by Primetals …

Depending on the product mix, a single-stand cold rolling mill can deliver rolling capacities of 100,000 to 400,000 t/a. Rolling schedules can be carried out with an even or odd number of passes to maximize mill availability and performance. The Universal Crown Control mill (UCM mill) with work roll bending, intermediate roll bending, intermediate roll shifting and all straight roll ...

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Impact Analysis of Roller System Stability for …

Modern four-high mills all set corresponding offset value [1, 2], such as 2050 CVC four-high rolling mill and 4300-medium plate mill of the German SMS, four-roll rolling mill of the British DAVY, 1580-pair cross four-high rolling mill of Japan Mitsubishi heavy industries. But these modern four-high mills with offset all have roller parallel positioning instability, and with the increasing of ...

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ROLL ECCENTRICITY CONTROL WITH THE FORCE FEED …

ROLL ECCENTRICITY CONTROL WITH THE FORCE FEED FORWARD AGC SYSTEM Francis Wagner, Manager Rolling Mill Automation Hatch Associates Consultants, Inc., Buffalo, NY, USA ABSTRACT: The Force Feed Forward (FFF) System is the only hot strip mill AGC system in the world today which does not incorporate the BISRA principle for gage control. Instead, using a revolutionary …

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Roll Eccentricity Extraction Method Based on …

Roll eccentricity is ubiquitous in strip mills, which has a periodic impact on the strip thickness difference. Roll eccentricity compensation is an important part of the automatic gauge control system. Most roll eccentricity compensations extract the roll eccentricity based on the frequency domain analysis of the rolling force. It is difficult ...

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Roll Eccentricity Control Using Identified …

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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A BASIC UNDERSTANDING OF THE MECHANICS OF ROLLING MILL ROLLS

Secondary scale on hot strip and the impact 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

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