Roll Eccentricity Control for Strip Rolling Mills ...

01-07-1987· Typically, the number of backup roll cycles is as shown in Table I. TABLE 1 TYPICAL BACKUP ROLL CYCLES FOR DIFFERENT MILL TYPES MILL TYPE srAND PRODUCT NUMBER OF THICKNESS BACKUP ROLL (mm) CYCLES/PRODUCT Tandem cold mill First 0.3 100-400 Tandem hot mill First 2.5 10-25 Last 2.5 50-200 Plate mill Last 10.0 1-6 A review of previously proposed solutions to the eccentricity …

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hot rolling mill roll eccentricity - KINGFACT Heavy Machinery

hot rolling mill roll eccentricity,Rolls in rolling mills are never completely round but have eccentricity which can be caused by • grinding inaccuracy • nonuniform thermal expansion • asymmetrical adjustment of bearing rolls shell via drive keys Each eccentricity consists of a base frequency which is the rotary frequency of the roll and several harmonic frequencies

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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 roll-eccentricity-induced periodic disturbances in the strip exit thickness of hot and cold rolling mills.

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rolling mill roll eccentricity control

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 …

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hot rolling mill roll eccentricity - peterhulley.co.za

hot rolling mill roll eccentricity LM Vertical Grinding Mills According to customers'' requirements, TENSHION success in absorbing foreign experience and world-advanced technology, and in producing our vertical products, with self-owned intellectual property right.

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Hot Rolling Mill Roll Eccentricity Crushing

Hot Rolling Mill Roll Eccentricity Crushing. Aggregate Crushing Plant South Africa Stone Crushing Plant Pakistan Sand Production Line 5070th Gold Ore Crushing Production Line in Malaysia 5000th Copper Ore Crushing Production Project in Kenya 500th Iron Ore Crushing Production line in South Africa 250th Granite Crushing Production Line in Zambia 100th Complete Limestone Crushing …

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hot rolling mill roll eccentricity - simonvermote.be

99 P Kucsera et al Hot Rolling Mill HGC Thickness Control Improvement Figure 6 Effect of roll eccentricity on output strip thickness Figure 7 Thickness control loop with eccentricity thickness deviation as a disturbance The hot rolling mill environment is quite harsh so the X-ray thickness gauge is placed a few meters away from the

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Rolling Mill Roll Eccentricity Control - elpicador.fr

Multivariable Control of Cold-Rolling Mills with Roll Eccentricity - Roll Eccentricity;Thickness Control;Gaugemeter Thickness Estimator;LQ Feedback … Patent US4222254 - Gauge control using … A roll eccentricity control apparatus for use with an automatic gage control device of gage meter type for a rolling mill comprising rolls for rolling the material to ...

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

24-07-2020· 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.

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how to control eccentricity problem in hot rolling mill

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 . Get Price; how to control eccentricity problem in hot rolling mill

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Active compensation of roll eccentricity in rolling mills ...

This paper is concerned with the active compensation of the roll-eccentricity-induced periodic disturbances in the strip exit thickness of hot and cold rol Active compensation of roll eccentricity in rolling mills - IEEE Journals & Magazine

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Hot Rolling Mill Roll Eccentricity Crushing

Hot Rolling Mill Roll Eccentricity Crushing. Aggregate Crushing Plant South Africa Stone Crushing Plant Pakistan Sand Production Line 5070th Gold Ore Crushing Production Line in Malaysia 5000th Copper Ore Crushing Production Project in Kenya 500th Iron Ore Crushing Production line in South Africa 250th Granite Crushing Production Line in Zambia 100th Complete Limestone Crushing …

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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.

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Rolling process animation || Rolling mill machine concept ...

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

12-11-2013· Roll eccentricity is not part of the controller but must be considered to be consistent with data reported from operating mills which . Figure 3. Effects of roll eccentricity on output strip thick- ness. usually includes its effects. The eccentricity components remaining in the mill …

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Hot Rolling Mill Hydraulic Gap Control (HGC) thickness ...

Schematic structure of a hot rolling mill The thickness of the rolled material is measured by an X-Ray thickness gauge in the last pass. This measurement is possible within several meters distance from the roll gap, therefore considerable dead time has to be taken into account in thickness control.

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

12-11-2013· Roll eccentricity is not part of the controller but must be considered to be consistent with data reported from operating mills which . Figure 3. Effects of roll eccentricity on output strip thick- ness. usually includes its effects. The eccentricity components remaining in the mill …

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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, like e.g. inexact roll grinding or nonuniform thermal expansion of the rolls.

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hot rolling mill roll eccentricity - otacos-liege.be

hot rolling mill roll eccentricityHof van Hoeven. 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 …

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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.

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US3543549A - Rolling mill control for compensating for …

Roll eccentricity correction system and method US4038848A (en) * 1974-05-31: 1977-08-02: Hitachi, Ltd. Method and apparatus for controlling eccentricity of rolls in rolling mill DE2605183A1 (en) * 1975-02-12: 1976-08-26: Hitachi Ltd: Means for controlling the thickness of the rolling in a rolling mill

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How To Control Eccentricity Problem In Hot Rolling Mill

Hot Rolling Mill Roll Eccentricity. 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 ...

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IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS 1 Online ...

rolling mills. The roll eccentricity-induced disturbances can result in strip thickness deviation and product quality ... THE hot/cold rolling process is a high speed, transient,

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Roll Eccentricity Control Using Identified Eccentricity of ...

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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(PDF) Reducing thickness variation of hot rolled steel ...

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 ...

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Hot Rolling Mill Hydraulic Gap Control (HGC) thickness ...

Schematic structure of a hot rolling mill The thickness of the rolled material is measured by an X-Ray thickness gauge in the last pass. This measurement is possible within several meters distance from the roll gap, therefore considerable dead time has to be taken into account in thickness control.

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