hot rolling mill roll eccentricity

How does it work: hot-strip rolling mill - YouTube

Mar 31, 2015· ThyssenKrupp Steel Europe spent a quarter of a million euros on renovating its hot-strip rolling mill in Duisburg. The animation shows how it all works.

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how to control eccentricity problem in hot rolling mill

Hot Rolling Mill Roll Eccentricity - Crusher USA » ball mill versus roll mill » what coal mill, vertical roller mill, raw mill, ball mill etc » how to control eccentricity problem in hot rolling mill » More; sitemap; Previous: coal vibration screen and crusher; Next: allis chalmers 7 36 cone crusher hydrocone

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Hot Rolling Mills Solutions | Nidec Industrial Solutions

ARTICS Hot Rolling Mills Real time control for Hot Rolling Mills. With more than 50 years of experience, Nidec Industrial Solutions has developed a vast array of functions based on auto-adaptive mathematical models that optimize rolling schedule calculations in real time.

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Neural network for identification 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 rolling mills. Today's demand on thickness tolerances less than 0.8% require efficient methods for roll eccentricity identification and compensation.

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ROLL ECCENTRICITY COMPENSATION (REC) - primetals.com

Rolls in rolling mills are never completely round but have eccentricity which can be caused by: • grinding inaccuracy • non-uniform 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 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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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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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.

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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 Force Feed Forward (FFF) System is the only hot strip mill AGC system in the world today which does not incorporate the …

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Rolling Mill - an overview | ScienceDirect Topics

The main features incorporated into modern hot rolling mill design include the following aspects: • Large coil weights (> 20 tons) to increase productivity, yield and mill uptime. • Capability to roll strip and plate in widths of > 2000 mm. • Flexibility to operate across the range of soft, medium and hard alloys. •

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Loop monitoring and assessment of hot strip mill control

1.4 Hot strip mills The objective in a hot strip mill (HSM) is to roll thick slabs into thin strips. Slabs are ingots of alloy metal that are produced in a continuous casting plant. The slabs rolled in Avesta have been manufactured in Tornio (Finland), Sheffield (Great Britain) and Avesta. They have a length of up to 11 meter, a thickness ...

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

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 exit thickness after compensation.

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Solutions for cold rolling mills Technological controls ...

Solutions for cold rolling mills Technological controls for cold rolling processes Rolling of flat metal products is a complex process where the quality of the product is influenced by various factors like incoming material, mechanical and electrical equipment, lubrication and control strategies. For high-end performance in terms of

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A SURVEY OF THE LOOPER-TENSION CONTROL …

A SURVEY OF THE LOOPER-TENSION CONTROL TECHNOLOGY IN HOT ROLLING ... and mass flow in hot rolling mills can be satisfied by proper control of the strip tension and looper ... set–up mismatch, skid marks, roll eccentricity and so on. However, while the hydraulic screw down

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

Jan 01, 2014· 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 ...

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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

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hot rolling mill roll eccentricity - pochiraju.co.in

Neural network for identification of roll eccentricity in rolling mills. Feb 16, 1999 ... The roll eccentricity in a rolling mill may define the limit of ... thus is subject of interest for the automation equipment in hot rolling mills as well as...

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Non-circular grinding of backup rolls to reduce rolling ...

The empirical research took place at a hot strip mill. As a result, the 3D ground non-circular geometry of the backup rolls considerably reduced the rolling force variation. Key words: non-circular grinding, rolling mill, backup roll, rolling force variation. 1. INTRODUCTION Contemporary steel mills are operating on a global market and the ...

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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 ...

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Hot & Cold Rolling Mill Machines - aarkayassociate.com

Our range comprises reduction gear box, cold rolling mill machines, flywheel assembly, roller conveyor, forged rolls, speed increaser and hot saw machine. Designed with the assistance of our engineering excellence, these easy to operate and install machines can …

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Rolling (metalworking) - Wikipedia

These backup rolls are larger and contact the back side of the smaller rolls. A four-high mill has four rolls, two small and two large. A cluster mill has more than 4 rolls, usually in three tiers. These types of mills are commonly used to hot roll wide plates, most cold rolling applications, and to roll foils.

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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 rolling mills.

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Rolling Mill Academy – Advanced Control Technology Training

Rolling Mill Control Technology Training Course – Gauge, Flatness, Profile Control for Hot and Cold Rolling in Steel and Aluminium Manufacturing. Welcome to the Rolling Mill Academy 11th International Rolling Mill Academy. Register your interest here. ... backup-roll eccentricity control schemes, ...

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FAULT DIAGNOSIS OF ROLL SHAPE UNDER THE SPEED …

find both eccentricity magnitude and eccentricity location in the roll as shown in Fig.10. But, as shown in Fig.12, not only magnitude of eccentricity but also location of eccentricity in the roll is obtained. 4.2 Simulations with Field Data Fig.13 shows a simplified multi-stand hot rolling system. The rolling system consists of seven stands.

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Aluminum Rolling Mills - Primetals Technologies

1. Hot Rolling Mills Primetals Technologies Japan, Ltd. is a world leading manufacturer of advanced aluminum rolling mills for higher quality products. 1+4 Hot Rolling Mill Line • Mill Approach Table, Transfer Table • Heavy Gauge/Light Gauge Shears • Reversing Mill (RM) and Levelling4 stands Tandem Mill (FM) - Mechanical Passline Adjustment

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Tandem Cold Mill | Primetals Technologies

TANDEM COLD MILL Tandem cold-mill solutions from Primetals Technologies stand for high product yields combined with flexible production, low operational costs and simplified maintenance work. Depending on the product mix, the production capacity of continuous tandem mills from Primetals Technologies can exceed 1.2 million tons per year.

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US5181408A - Method of measuring and compensating roll ...

an off-line eccentricity identification method which is performed when there is no plate rolling through the mill and with the top work roll and the bottom work roll in tight contact, said off-line eccentricity identification method determining the eccentricity values of N first points which equally divide a circumference of the top backup roll and N second points which equally divide a ...

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Advanced automation system for Dragon Steel’s new hot ...

Advanced automation system for Dragon Steel’s new hot strip mill Dragon Steel Corporation, a subsidiary of China Steel ... This new hot rolling mill (figure 1) was designed to produce strip up to 1,880 ... speed, gap, roll force, and tempera-ture is required to …

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The Complete Technology Book on Hot Rolling of Steel

The Complete Technology Book on Hot Rolling of Steel Author: NIIR Board of Consultants & Engineers Format: Paperback ... then the process is termed as hot rolling. The hot mills using plain rolls were already being employed by the ... Roll Eccentricity Control Methods

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

– 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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Reducing thickness variation of hot rolled steel strip by ...

2 Rolling mill stand unit design 1 Rolling force variatio n consists of changes of a rolling force level, b rolling force uctuation and c drop of rolling force once in back-up roll revolution Widmaier et al. Reducing thickness variati on of hot rolled steel strip 134 Ironmaking and Steelmaking 2009 VOL 36 NO 2

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Rolling mill roll eccentricity control - Kaiser Aluminum ...

Jul 04, 1989· The invention relates to the control of rolling mill backup roll eccentricity by combining the load carrying characteristics of rolling mill tapered roller bearing assemblies during rolling with prescribed levels of axial thrust to effect a controlled deflection of backup roll necks on a 4-high rolling mill or the like due to the selected thrust force applied axially to the ends or necks of ...

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Hot Rolling Mill - YouTube

Apr 22, 2012· (Roll forming: http://youtu.be/k6iODHla6qY) 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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