how to control eccentricity problem in hot rolling mill


9th INTERNATIONAL ROLLING MILL ACADEMY

ADVANCED CONTROL 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 3.1 Key Feature of Process Control: Detection of Periodic Defects Rolls and rollers are the most heavily used parts of a rolling mill. Due to wear from contacting hot material with great force, their lifetime is limited. Although rolls

Rolling of Metals: Process and Principles (With Diagram)

2016/12/23· The rolling process is shown in Fig. 2.1: Rolling is done both hot and cold. It is accomplishes in rolling mills. A rolling mill is a complex machine having two or more working rollers, supporting rollers, roll stands, drive motor 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

H∞ Control system for tandem cold mills with roll …

2004/01/01· H∞ Control system for tandem cold mills with roll eccentricity Article (PDF Available) in Journal of Mechanical Science and Technology 18(1):45-54 · January 2004 with 70 Reads How we measure ... Quality Improvement in Finished Cold Rolled Sheet by reducing the defect Ranjan Prakash*, Baidya Nath Roy** *Student, M.Tech. Metallurgical Engineering Department, B.I.T.Sindri, Jharkhand, India. ** Assistant Professor

Rolling Mill Tutorial - Control System Design

Another control problem (besides the continuous caster) arising in the steel industry is the control of the exit steel thickness in a rolling mill. The diagram below shows the layout of a rolling mill, with thick steel going in It is Part 1 ... 2017/01/14· Control of strip thickness and cross-section is a real challenge in a hot strip rolling mill. In order to continuously monitor the thickness of strip being rolled, x-ray or gamma ray sensors are used. Precise control of gauge of rolled

Planning and Scheduling Optimization in …

making furnace, continuous caster, hot rolling mill, cold rolling mill and nishing mill into a synchronized production ow. These processing units will be discussed in detail in the following chapter. The important concept is that this Technological Milestones and World Records 1914 The first electric arc furnace in Italy. The story begins. 1926 Danieli Wean United The world's first 4-high Continuous Hot Strip Steel Rolling Mill, which made it possible for width ...

hot rolling mill roll eccentricity

how to control eccentricity problem in hot rolling mill 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 … BibTeX @MISC{Wagner_rolleccentricity, author = {Francis Wagner and Manager Rolling and Mill Automation}, title = {ROLL ECCENTRICITY CONTROL WITH THE FORCE FEED FORWARD AGC SYSTEM}, year = {}} Abstract The ...

hot rolling mill roll eccentricity - Pochiraju Industries Ltd

Cold Rolling Mill Thickness Control Using The Cascade-Correlation ... Backup Roll. Thickness gauge. Tension reel. Mill Stand strip. Outgoing. Figure 1. ..... of the position control loop is the roll eccentricity, arising from imperfect roll... In rolling mill, the accuracy and quality of the strip exit hickness aret very important factors. To realize high To realize high accuracy in the strip exit thickness, the Automatic Gauge Control (AGC) system is used.

(PDF) Online Monitoring System Design for Roll Eccentricity ...

2015/05/01· Online Monitoring System Design for Roll Eccentricity in Rolling Mills Article (PDF Available) in IEEE Transactions on Industrial Electronics 63(4) · May 2015 with 547 Reads How we measure 'reads' Rolling schematic view Rolling visualization. In metalworking, rolling is a metal forming process in which metal stock is passed through one or more pairs of rolls to reduce the thickness and to make the thickness uniform. The concept is similar to the rolling of dough. Rolling is classified according to the temperature of the metal rolled. If ...

The Complete Technology Book on Hot Rolling of …

The Complete Technology Book on Hot Rolling of Steel Author: NIIR Board of Consultants & Engineers Format: Paperback ISBN: 9788190568586 Code: NI147 Pages: 656 Price: Rs. 1,575.00 US$ 150.00 Publisher: NIIR PROJECT Hot Rolling Mill Roll Eccentricity We are a large-scale manufacturer specializing in producing various mining machines including different types of sand and gravel equipment, milling equipment, mineral processing …

ROLL ECCENTRICITY CONTROL WITH THE FORCE FEED ...

BibTeX @MISC{Wagner_rolleccentricity, author = {Francis Wagner and Manager Rolling and Mill Automation}, title = {ROLL ECCENTRICITY CONTROL WITH THE FORCE FEED FORWARD AGC SYSTEM}, year = {}} Abstract The ... Latin American Applied Research 36:199204 (2006) 199 MODELLING AND CONTROL OF A HOT ROLLING MILL F. G. ROSSOMANDO† and J. DENTI FILHO‡ » More how to control eccentricity problem in hot rolling Get price

roll eccentricity pdf

Hot Rolling Mill Hydraulic Gap Control (HGC) thickness ... 4 · Roll bending is not directly linked to thickness control, but usually this control is incorporated in the same hardware, together with AGC. Work roll bending forces are 1 HOT ROLLING PRACTICE – An Attempted Recollection Saral Dutta. B. Tech. (Hons.), I.I.T. Executive Director, ISP & RMD, SAIL (Retired) Rolling is a metal forming process in which metal stock is passed through a pair of

A BASIC UNDERSTANDING OF THE MECHANICS OF ...

the contact area of hot rolled material during rolling may be unique but neck loads and contact stress in all other applications (cold rolling, back up rolls) have similarities in other components. Therefore I hope this book will be useful in giving a general understanding of especially big components - Back-up Roll eccentricity compensation function is provided for No. 1 stand as well. In order to realize various modes of automatic gauge control, laser type speed-meter is equipped on every X-ray thickness gauge. Strip tension

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

The hot rolling mill of the Fukui Works went into service in May, 1983 as a world-class facility, equipped with large rolling stands capable of producing wide, large-diameter coils and featuring the latest in computer control. Since ... 2017/01/14· Control of strip thickness and cross-section is a real challenge in a hot strip rolling mill. In order to continuously monitor the thickness of strip being rolled, x-ray or gamma ray sensors are used. Precise control of gauge of rolled

The Hot Rolling Process - California Steel Industries

The Hot Rolling Process The primary function of the Hot Strip Mill is to reheat semi-finished steel slabs of steel nearly to their melting point, then roll them thinner and longer through 12 successive rolling mill stands driven by motors 2015/05/01· Online Monitoring System Design for Roll Eccentricity in Rolling Mills Article (PDF Available) in IEEE Transactions on Industrial Electronics 63(4) · May 2015 with 547 Reads How we measure 'reads'

Seamless steel pipe produces eccentricity (uneven thickness ...

2019/03/27· The eccentricity of many steel pipes is generated at this time, so it is very important to strictly control this perforation. Finished steel pipe Cold drawn steel pipe can also cause eccentricity problems due to perforation: By Francis Wagner, Manager Rolling and Mill Automation 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.

how to control eccentricity problem in hot rolling mill

how to control eccentricity problem in hot rolling mill Friction induced hysteresis is shown to be a major cause of poor performance whose impact can be minimised by the appropriate location of load cells and the correct control ... Abstract: The problem of roll eccentricity has become one of important factors to affect the quality of strips as downstream industries require improvement of the strip quality. [5] Y.M. Li, The modified fast fourier transform and its application to the compensation of eccentricities in a cold mill rolling, Acta Automatica Sinica. 16 (1990) 151-155.

Rolling process animation || Rolling mill machine …

2017/10/18· Next type of rolling mill is three high rolling mill. In this type of rolling mills, three rollers are used one over the other in a vertical line. We can pass the ingot between first two … hot rolling mill roll eccentricity . Rolling Mill Roll Eccentricity Control ness in hot rolling mills can be aboutμπι and more. Roll eccentricities arise from axial deviationscontrol of the hydraulic piston and the active eccentricity.

Method and apparatus for eccentricity correction in a rolling mill

1977/06/03· This invention relates to a method and apparatus for eccentricity correction in a rolling mill system. 2. Description of the Prior Art In hot and cold rolling mills the eccentricity of the back-up rolls results in a major problem, in that, if 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 ...

Causes of eccentric (uneven thickness) of seamless …

2018/12/05· The eccentricity of the cold drawn steel pipe for finishing rolling also causes eccentricity. Any factor that destroys the geometric shape correctness of the deformation zone formed by roll, top and guide plate will … Rolling is most often, (particularly in the case of the conversion of an ingot or continuous casting), performed hot. At a rolling mill, blooms and slabs are further rolled down to intermediate parts such as plate, sheet, strip, coil

Online Eccentricity Monitoring of Seamless Tubes in …

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 finished tubes using ICCAS2005 June 2-5, KINTEX, Gyeonggi-Do, Korea Online Automatic Gauge Controller Tuning Method by using Neuro-Fuzzy Model in a Hot Rolling Plant Sunghoo Choi, YoungKow Lee, SangWoo Kim⁄ and SungChul Hong⁄⁄ ⁄Division of Electrical and Computer Engineering, Pohang University of Science and Technology, Pohang 790 …