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How To Control Eccentricity Problem In Hot Rolling Mill

31 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 are refurbished in the roll shop regularly they occasionally crack before the end of the usual production cycle

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  • Active compensation of roll eccentricity in rolling mills

    Abstract This paper is concerned with the active compensation of the roll eccentricityinduced periodic disturbances in the strip exit thickness of hot and cold rolling mills The roll eccentricity may be caused by different reasons like eg inexact roll grinding or nonuniform thermal expansion of the rolls

  • Strip Thickness Control of Cold Rolling Mill with Roll

    In rolling mill the accuracy and quality of the strip exit thickness are very important factors To realize high accuracy in the strip exit thickness the Automatic Gauge Control AGC system is used Because of roll eccentricity in backup rolls the exit thickness deviates periodically In this paper we design PI controller in outer loop for the strip exit thickness while PD controller is

  • Rolling of hot strip and strip defects IspatGuru

    Jan 14 2017018332Hot Rolling is employed for rolling of steel slabs to hot strips in hot strip mills Like any other hot rolling operations rolling of hot strip is also a plastic deformation of the material of the slab caused by compressive force applied through a set of rolls The cross section of the slab is reduced by the hot rolling process

  • 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 Rolleccentricityinduced 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

  • Hot rolling mill process and hot rolled steel sections

    Hot rolling begins with heating the billet or blooms to a high temperature of around 1100 degrees Celsius The temperature is of particular importance Hot rolling and hot extruding drawing involves working above the recrystallization point of the steel The mill passes the heated material through a variable number of stands

  • 60 YEARS OF ROLLING MILL TECHNOLOGY By Ford B

    Rolling mills are not a standard machine tool nor are they built for stock They are designed and builttoorder to specifically accomplish an end product or process At one point during the industrial revolution in America the United States led the world in hot and cold rolling plate mills slabbing mills and blooming mills

  • Technological control for cold rolling processes

    Thickness feedback control 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 systems dynamic response particular at low rolling speed

  • PDF Strip Thickness Control of Cold Rolling Mill with

    Strip Thickness Control of Cold Rolling Mill with Roll Eccentricity Compensation by Using Fuzzy Neural Network Article PDF Available in Engineering 06012733 183 January 2014 with 591 Reads

  • Efficient Special Steel Mills from Primetals Technologies

    The most common configuration is the single reversing mill Various mill designs are offered that include 6high UCMs Universal Crown Control Mill ZR mills and 12high coldrolling mills with smalldiameter work rolls for the efficient rolling of materials of high hardness

  • Rolling Mill Tutorial Control System Design

    Rolling Mill Tutorial Before continuing make sure you have read Chapter 5 System Description 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 one side and thin

  • CiteSeerX ROLL ECCENTRICITY CONTROL WITH THE

    CiteSeerX Document Details Isaac Councill Lee Giles Pradeep Teregowda 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 control algorithm FFF has proven in five installations in North and South America that steelmakers need not replace their

  • Active compensation of roll eccentricity in rolling mills

    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 Mill Roll Eccentricity Control

    Patent US3543549 Rolling mill control for The online eccentricity compensation method is utilized for to an automatic gauge control the top or bottom backup rolls of a rolling mill

  • Figure 1 from Strip Thickness Control of Cold Rolling Mill

    DOI 104236eng201461005 Corpus ID 30768077 Strip Thickness Control of Cold Rolling Mill with Roll Eccentricity Compensation by Using Fuzzy Neural Network articleHameed2014StripTC titleStrip Thickness Control of Cold Rolling Mill with Roll Eccentricity Compensation by Using Fuzzy Neural Network authorWaleed Ishaq Hameed and Khearia A Mohamad journalEngineering

  • Unwindrewind eccentricity control for rolling mills

    Mar 06 1990018332Unwindrewind eccentricity control for rolling mills United States Patent 4905491 Abstract 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 andor to a rewind coil of the material from the mill the material being under tension as it is directed to and from the

  • US3543549A Rolling mill control for compensating for the

    Variation in the rolling load may however be due to factors other than variations in the gauge of the ingoing material such factors as for example eccentricity and ovality of one or more 7 of the rolls of the mill and when automatic gauge control is used which depends for its operation on variations in the rolling load compensatory forces

  • hot rolling mill roll eccentricity Marktbewerking in ICT

    hot rolling mill roll eccentricity Active compensation of roll eccentricity in rolling mills This paper is concerned with the active compensation of the rolleccentricityinduced periodic disturbances in the strip exit thickness of hot and cold rolling mills

  • Roll Eccentricity Control for Strip Rolling Mills

    An indepth 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

  • 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

  • Rolling Mill Roll Eccentricity Control Panola Heavy

    Hot Rolling Mill Roll Eccentricity 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

  • Hot Rolling Mill Hydraulic Gap Control HGC thickness

    accuracy in thickness control in metal rolling area If the required accuracy of hot rolling mills can be achieved then in some cases cold rolling is not even required which can result in a radical decrease of production costs The schematic structure of a typical aluminum hot reversing rolling mill

  • Strip Thickness Control of Cold Rolling Mill with Roll

    Nov 12 2013018332been developed for hot or cold mill processes The British Iron and SteelResearch Association B1SRA AGC method based on the gaug meter principle and the feede forward AGC method using the delivery time of the strip have been widely utilized in steel rolling mills 3 Strip products thickness precision is an important quality parameter

  • rolling mill roll eccentricity control

    rolling mill roll eccentricity control 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

  • PDF Hot rolling mill hydraulic gap control HGC

    P Kucsera et al Hot Rolling Mill HGC Thickness Control Improvem ent 102 Where v is mill speed and l is the distance bet ween the wo rk ro lls and the X ray

  • Table 1 from Strip Thickness Control of Cold Rolling Mill

    DOI 104236ENG201461005 Corpus ID 30768077 Strip Thickness Control of Cold Rolling Mill with Roll Eccentricity Compensation by Using Fuzzy Neural Network articleHameed2014StripTC titleStrip Thickness Control of Cold Rolling Mill with Roll Eccentricity Compensation by Using Fuzzy Neural Network authorWaleed Ishaq Hameed and Khearia A Mohamad journalEngineering