hot rolling mill roll eccentricity

Roll eccentricity is widespread in the strip mill, has cyclical impact on strip thickness, so disturbance compensation is required to improve the product quality. The key step of disturbance compensation is to obtain reliable roll eccentricity signal. Existing direct measurements of roll eccentricity Apr 18, 2011• Schedule-Free-Rolling Optimization - For increased scheduling flexibility and longer rolling campaigns with the same work-roll set Siemens VAI-Q Strip Siemens VAI-Q Strip is an extraordinary quality-control system for hot-rolling mills which allows the mechanical properties of hot-rolled strip to be predicted and controlled online.

9th INTERNATIONAL ROLLING MILL ACADEMY

9th INTERNATIONAL ROLLING MILL ACADEMY 5-9 November 2007 - Glasgow, Scotland The lectures will be given by leading international experts in hot and cold mill control systems. As well as providing an in-depth understanding of the theory they will also explain the practical issues of implementing rolling mill control systems.

Hot Rolling Plant Sunghoo Choi To make a hot rolled coil, a roughing mill and flnish-ing mill are used. Slabs are rolled roughly in the roughing mill because they are hard to be rolled to a required thickness at one time. And then the strip passes through the flnish- the roll eccentricity

The Accu-Roll hot rolling mill belongs to skew rolling mill. It increases the rolling angle of the roll and lengthens the roll body of the Accu-Roll tube mill, adopting the upper and lower guide plates, so that the thickness accuracy of the steel pipe, rolling speed and production capacity are increased.

troller at Avesta steckel mill. The introduction will cover the different control mod-ules included in this thesis, the importance of monitoring tools, difficulties in rolling and also give a short presentation to hot strip rolling. For further reading on hot strip mills and hot rolling [1] and [2] are recommended.

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.


A BASIC UNDERSTANDING OF THE MECHANICS OF ROLLING

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. Schrder July 2003 K. H. Schrder: A BASIC UNDERSTANDING OF THE MECHANICS OF ROLLING MILL ROLLS

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

Xtek's Roll Reconditioning and Repair Services extend into the specialty roll area as well. Periodic or routine maintenance programs on Hot Strip Mill Edger Rolls and Downcoiler Pinch Rolls are a part of the services conducted Xtek. These programs often include the machining of a pass-line profile or the regrinding of the body diameters.

CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): Abstract: The metal processing system usually consists of various components such like motors, work rolls, backup rolls, idle rolls, sensors, etc. Even a simple fault in a single component in the system may cause a serious damage on the final product. It is therefore necessary to diagnose the faults of the components

TMEIC Supplies Superior Control Systems for Hot Rolling Mills Hot rolling mills roll heated steel, stainless, and aluminum slabs to make hot strip with a thickness of a few millimeters to over ten millimeters. Hot coils are shipped as they are, or moved to another operation and processed to cold rolled sheet, coated steel sheet, or steel pipe.

For a long time, because of the low precision of the hot rolling, the influence of the roll eccentricity is a digital filtering method. With the improvement of the precision of the thickness difference of the hot rolling, the eccentric control of hot rolling roll is one of the hot topics in the current research. (3) X-ray thickness monitoring

Dec 24, 2018The Three High Rolling Mills comprises of a roll stand with three parallel rolls one above another. The adjacent rolls rotate in the opposite direction to pass the material between the top and middle roll in single direction, and the bottom and central roll in the opposite direction. The workpiece is rolled on both forward and return passes.

Dec 22, 2013Fig 2 work roll bending and continuous varying crown. 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

Roll Eccentricity Phase Identification System

Roll eccentricity is widespread in the strip mill, has cyclical impact on strip thickness, so disturbance compensation is required to improve the product quality. The key step of disturbance compensation is to obtain reliable roll eccentricity signal. Existing direct measurements of roll eccentricity signal method requires special equipments with high precision but not practical enough.

Rolling Mill Tutorial - Part 4. The sinusoidal variations in exit thickness are due to the fact that the rolls are not perfectly round, but contain various bumps or imperfections. These imperfections are known as the eccentricity of the roll. Eccentricity is a periodic signal, since it will repeat each time the roll completes a revolution.

Hot Rolling Mill Hydraulic Gap Control (HGC) 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= Waleed Ishaq Hameed and Khearia A. Mohamad .

Rolling Mill Tutorial - Part 5. Before continuing, make sure you have read Section 21.11: Linear Optimal Filters. Observers. To estimate roll eccentricity, we view the output of the BISRA gauge (which is h + e) as the eccentricity e plus some noise. Before we can use an observer to estimate the roll eccentricity, we need to model it.

Hot Rolling Mills. The plates and coils are of premium quality in terms of dimensional adherence and internal soundness owing to its clean raw material sound steel refining facilities and an efficient rolling mill These comply to IS 2062 specifications up to E450 grades besides a wide range of international standards and steel grades as per EN DIN JIS ASTM and so on The mill is approved by

roll force and torque in the hot rolling process. As an improvement, Poliak, Shim, Kim, and Choo (1998) examined a proposed linear regression model to predict the roll force in hot plate rolling. Lee and Lee (2002) proposed a long-term learning method using neural network to improve the accuracy of rolling-force prediction in hot rolling mill

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