hot rolling mill roll eccentricity

Roll Eccentricity Control for Strip Rolling Mills ...

Jul 01, 1987 · Awtm/ia Abstract: 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. A unifying approach to eccentricity control ~nables the diverse range of published ...

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Active compensation of roll eccentricity in rolling mills ...

In Kugi et al., 2 an active compensation of the roll-eccentricity-induced periodic disturbances has been done for the strip exit thickness of hot and cold rolling mills. The factorization approach ...

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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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Online Monitoring System Design for Roll Eccentricity in ...

This paper deals with the parameter estimation and online monitoring of roll eccentricity in rolling mills. Roll-eccentricity-induced disturbances can result in strip thickness deviation and ...

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hot rolling mill roll eccentricity in haiti

hot rolling mill roll eccentricity in haiti. Roll Eccentricity Control for Strip Rolling Mills,Jul 01 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 CYCLESPRODUCT Tandem cold mill First 03 100400 Tandem hot mill First 25 1025 Last 25 50200 Plate mill ...

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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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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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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 ...

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Efficient Special Steel Mills from Primetals Technologies ...

The ZR mill is a mill for cold rolling of hot-rolled coils of stainless steel and other hard materials to the designated product thickness and strip shape accuracy. The ultra-small diameter rolls are firmly supported in a 20Hi roll cluster arrangement. ... Roll Eccentricity Expert for

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

DOI: 10.4236/ENG.2014.61005 Corpus ID: 30768077. Strip Thickness Control of Cold Rolling Mill with Roll Eccentricity 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={W. I. Hameed and K. Mohamad}, journal={Engineering},

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Main Features of a modern Hot Strip Mill – IspatGuru

Dec 22, 2013 · Fig 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 force.

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Strip Mills – AR GROUP OF INDUSTRIES

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 force.

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The Complete Technology Book on Hot Rolling of Steel

Hot rolling mill thus helps in reducing the size of a metal thereby molding it into the desired form and shape. Rolling mills perform the function to reform the metal pieces such as billet and ingot whilst maintaining its well equipped micro structure into bar, wire, sheet, strip, and plate. Hot rolled products are frequently categorized

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

P. Kucsera et al. Hot Rolling Mill HGC Thickness Control Improvement – 98 – Another way to determine the thermal expansion of the work roll is the modelling of

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Dave Knapp – TelePro, Inc. - tpri

An encoderless roll eccentricity compensation system for rolling mills and sheet casters; Shop floor inventory and production tracking systems for hot rolled plate and coiled products and for sheet finishing operations; A standard hydraulic mill stand control product for rolling mills

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A novel real-time fuzzy-based diagnostic system of roll ...

INTRODUCTIONG IVEN A SET OF thickness defects measured in a rolled strip at the exit of a finishing hot strip mill (FHSM), the problem is to diagnose the following: 1) whether defects come from roll eccentricity; 2) for a defect caused by roll eccentricity, which roll or rolls produced it.

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ROLL SPEED SET-UP IN HOT STRIP FINISHING ROLLING MILL ...

Jan 01, 2007 · Hot strip finishing mill is initially set up with rolling conditions such as roll speed, roll gap, and cooling pattern obtained by a set-up model. To improve the accuracy of initial roll speed setting for a 7–stand finishing mill, an equation for predicting forward slip and a compensation method for initial roll speed setting were proposed ...

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

Rolling mill is the core equipment in modern iron and steel industry, and the reliability of its mill roll system (MRS) is the key to ensure the rolling process with high precision, high speed ...

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Top PDF hot rolling mill process - 1Library

Because the dimensions of existing hot-rolled T-bars are unsuitable, T-bars fabricated by welding two plates are cur- rently used in shipbuilding. To manufacture slim T-bars by hot rolling, we devised a new T-bar rolling process using two universal mills and an edging mill. The two universal mills have different roll

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Multi-resolution wavelet method for roll eccentricity ...

In order to compensate the roll eccentricity in hot strip rolling process, a multi-resolution wavelet transform method was proposed. This wavelet method has quiet good localization characteristic in both time domain and frequency domain. To eliminate frequency aliases inhered in Mallat algorithm, an anti-aliasing algorithm combining fast Fourier transform (FFT) and inverse fast Fourier ...

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Efficient Special Steel Mills from Primetals Technologies ...

The ZR mill is a mill for cold rolling of hot-rolled coils of stainless steel and other hard materials to the designated product thickness and strip shape accuracy. The ultra-small diameter rolls are firmly supported in a 20Hi roll cluster arrangement. ... Roll Eccentricity Expert for

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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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The Complete Technology Book on Hot Rolling of Steel

Hot rolling mill thus helps in reducing the size of a metal thereby molding it into the desired form and shape. Rolling mills perform the function to reform the metal pieces such as billet and ingot whilst maintaining its well equipped micro structure into bar, wire, sheet, strip, and plate. Hot rolled products are frequently categorized

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

hot-rolled coils, thereby effecting pass cutting in the cold-rolling process. 3) To realize a high-productivity hot-rolling mill by replac-ing the computer control system with one of the latest design that achieved a significant degree of automa-tion. The expansion of the hot finisher to 4 stands, which was

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Loop monitoring and assessment of hot strip mill control

casted steel slabs and rolled in two stands down to desired thickness. The first stand is a conventional roughing mill. The last stand is a steckel mill. It is a special rolling technique that is only used in a small number of hot strip mills in the world. When this special technique is used, the demand on the control is

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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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quality, a powerful controller is need- Rolling mill simulator

Rolling mill simulator A new platform for testing, analysis and optimization of cold rolling mills. Axel Brickwedde, Frank Feldmann, Nicolas Soler The cold rolling of flat metal products especially in tandem or multi-stand mills is a highly complex process where

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Technological packages › Flat › HAGC ‹ Danieli

Hydraulic automatic gauge control. BENEFITS. Fast-response thickness control. High-accuracy gap positioning. Smaller thickness tolerances and faster thickness correction. Reliability and easy maintenance design. Back-up roll eccentricity compensation. Outstanding accuracy and dynamic response. Dramatic reduction of off-gauge transients.

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Cold Rolling Mills Solutions | Nidec Industrial Solutions

ARTICS Cold Rolling High-quality process models for Cold Rolling Mills. Based on our consolidated experience in more than one hundred projects across the globe, 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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Thickness Gauge Innovation: Laser Ultrasonics Technology ...

Hot rolling mill operators and technologists now have access to insights not available with traditional radiometric gauging technology. Laser ultrasonics is the only technique that allows for direct, true, single-wall thickness measurements.

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The Complete Technology Book On Hot Rolling Of Steel by ...

Hot rolling mill thus helps in reducing the size of a metal thereby molding it into the desired form and shape. Rolling mills perform the function to reform the metal pieces such as billet and ingot whilst maintaining its well equipped micro structure into bar, wire, sheet, strip, and plate. ... Definition and Causes of Roll Eccentricity Design ...

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LQG Regulation: Rolling Mill Case Study - MATLAB ...

LQG Regulation: Rolling Mill Case Study Overview of this Case Study. This case study demonstrates the use of the LQG design tools in a process control application. The goal is to regulate the horizontal and vertical thickness of the beam produced by a hot steel rolling mill.

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