roll eccentricity quality

Roll Eccentricity Extraction Method Based on Comprehensive ...

It is difficult to ensure measurement precision of roll eccentricity due to the complexity of interference of the rolling force, therefore the compensation accuracy is difficult to ensure. The roll eccentricity extraction method, based on comprehensive signal processing, was introduced in this paper combined with engineering practice.

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Simulation and Analysis of Roller Eccentricity ...

Roll eccentricity is ubiquitous in strip mills, which has a periodic impact on the strip thickness difference. Roll eccentricity compensation is an important part of the automatic gauge control ...

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

roll necks due to irregularities in the mill rolls and/or roll bearings [11]. These irregularities cause cyclic deviations in the strip thickness at the output of a mill stand. Figure 3. depicts the effects of eccentricity on the output strip thickness [6]. When the entry strip is passed through the roll .

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Improvement of thickness tolerances in aluminium cold ...

"The ABB backup roll eccentricity and cyclic hardness variation has successfully corrected two major sources of strip thickness variation on the Alunorf 2-stand cold mill without any negative impact on mill productivity. The system has been virtually maintenance-free, .

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Roller Wave Distortion – Definition, Causes and a Novel ...

Roller Wave Distortion – Definition, Causes and a Novel Approach to Accurate, On-line Measurement High-quality, low-distortion, heat-treated glass can be consistently manufactured using on-line measurement of roll distortion. ... Any roll eccentricity imparts deformation to .

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Controlling Your Web from Beginning to End - Paper, Film ...

Using the machine as a reference point in this example, the greatest rotational velocity is when the roll eccentricity is aligned with point Y at 270 deg. This is because the turning radius at payoff point has been reduced by the amount of the roll eccentricity, and the roll .

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Paper Roll Eccentricity Inspection | Procemex

Paper Roll Eccentricity Inspection. Automatic optical measurement of ovality, eccentricity, and other dimensional features helps to assess product quality and ensure worker safety. Eccentricity measures how well the core is centered in the roll. If the core center is off from the roll center by more than a few millimeters, the roll may cause ...

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

improving the quality of the end product without the need for major investments. Research problem The thickness variation of the rolled steel strip is mainly ... the roll eccentricity have been introduced by, for example, Ginzburg 1 and Kugi et al. 2 The dynamics of

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High-Quality Steel Rolling: Theory and Practice - Vladimir ...

Emphasizing solutions to the problems of achieving tight tolerances of important geometrical parameters such as thickness, width, cross-sectional profile, and flatness, this reference focuses on the principles and applications of the latest technology for producing high-quality, flat-rolled steel products.;Illustrated with more than 700 drawings, High-Quality Steel Rolling: defines the ...

Online Eccentricity Monitoring Weihong Guo of Seamless ...

product quality and process information can be established through feature selection and statistical quality control methods. Hotelling T2 control charts are then constructed for online process monitoring and detecting eccentricity problems in the cross-roll piercing mill. The remainder of this paper is organized as follows. Section 2

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

Roll eccentricity is one of the most important and, consequently, any action directed to removing roll eccentricity or its effects will greatly improve thickness 1) whether defects come from roll eccentricity; quality and reduce production costs.

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methods to control eccentricity in forged rolls

In the system, the roll eccentricity frequency produced by the eccentricity of the rolls is detected and utilized for softening the effective rigidity or stiffness of the mill, that is, weakening the apparent mill modulus by control means according to the frequency of roll eccentricity. ... quality management system on stone crushers. qms ...

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US8491081B2 - System and method for compensating for roll ...

TECHNICAL FIELD. This disclosure relates generally to systems and methods that compensate for the rotational eccentricity of a roll in a printer, and more particularly to systems and methods for compensating for eccentricities in rolls that contact media in printers that control printhead firings with a single or dual reflex registration system.

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High-Quality Steel Rolling: Theory and Practice, 1st ...

Emphasizing solutions to the problems of achieving tight tolerances of important geometrical parameters such as thickness, width, cross-sectional profile, and flatness, this reference focuses on the principles and applications of the latest technology for producing high-quality, flat-rolled steel products.;Illustrated with more than 700 drawings, High-Quality Steel Rolling: defines the ...

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FAULT DIAGNOSIS OF ROLL SHAPE UNDER THE SPEED CHANGE .

Especially, the defects in a work roll are critical to the quality of strip. It is especially difficult to detect faults of a roll by using the existing frequency analysis method if the speed of the roll is changing. In this study, a new diagnosis method for roll eccentricity under the roll speed changes was developed.

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Eccentricity Meaning - YouTube

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Apr 24, 2015 · Video shows what eccentricity means. The quality of being eccentric; any eccentric behaviour.. The ratio, constant for any particular conic section, of the distance of a point from the focus to ...

Online Eccentricity Monitoring Weihong Guo of Seamless ...

product quality and process information can be established through feature selection and statistical quality control methods. Hotelling T2 control charts are then constructed for online process monitoring and detecting eccentricity problems in the cross-roll piercing mill. The remainder of this paper is organized as follows. Section 2

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Balance Quality Requirements of Rigid Rotors - IRD Balancing

Finally, a comparison of various balance quality grades is made with MIL-STD-167-1 and API balance limits. INTRODUCTION The International Standards Organization, ISO, published Standard 1940/1 "Balance Quality Requirements of Rigid Rotors," which has been adopted by the American National Standards Institute, ANSI, as S2.19-1975, "Balance Quality

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Diameter, Eccentricity, concentricity | Micro-Epsilon

Tire width inspection On-roll profile thickness measurement Tire geometry inspection Profile measurement of inner liner material ... Diameter, Eccentricity, concentricity. The diameter of an object can be established in different ways. ... An important criterion for the quality or the wear of tubes in industrial applications is the dimensional ...

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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 ...

  • Published in: Engineering · 2014Authors: Waleed I Hameed · Khearia A MohamadAbout: Artificial neural networkGet Price

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

Roll eccentricity is one of the most important and, consequently, any action directed to removing roll eccentricity or its effects will greatly improve thickness 1) whether defects come from roll eccentricity; quality and reduce production costs.

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An adaptive on-line sensor for roll eccentricity ...

An adaptive on-line sensor for roll eccentricity measurement and control J. F. Chicharo Department of Electrical and Computer Engineering, University of Wollongong, PO Box 1144, Wollongong NSW 2500, Australia This paper is concerned with the problem of roll eccentricity compensation in .

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Cold Mill Systems | TMEIC

Eccentricity Compensation Control reduces the effect of backup roll irregularities. ECC uses pattern recognition techniques to change the gap position to compensate for roll eccentricities. Tension Control. Tension control optimizes the strip tension between the stands, pay off reels and tension reels to produce quality .

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Roll Eccentricity Phase Identification System - CORE

Roll eccentricity is widespread in the strip mill, has cyclical impact on strip thickness, so disturbance compensation is required to improve the product quality. The key step of disturbance compensation is to obtain reliable roll eccentricity signal. Existing direct measurements of roll eccentricity signal method requires special equipments ...

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ROLL ECCENTRICITY COMPENSATION (REC)

roll force to extract the eccentricities. CHALLENGE The first step is to find out the degree of improvement of the exit thickness which can be expected by installing an eccentricity compensation. This is a challenge due the large number of different eccentricity frequencies which all change with roll speed.

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High-quality steel rolling : theory and practice (Book ...

Get this from a library! High-quality steel rolling : theory and practice. [Vladimir B Ginzburg] -- Emphasizing solutions to the problems of achieving tight tolerances of important geometrical parameters such as thickness, width, cross-sectional profile, and flatness, this reference focuses on the ...

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Improvement Thickness Tolerances 3BDD017154EN final

an existing two-stand aluminum cold roll-ing mill. An essential quality characteristic in the cold rolling sector is the minimum thickness deviation that can be achieved at final gauge, i.e. from the finishing pass. ... Backup roll eccentricity is not only the result of grinding and roll assembly tolerances, but can also be thermally induced

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

tion has forced existing mills to focus on improved and more even quality at a higher production speed. The tolerances of steel strip profiles have become ... cylinders to compensate the roll eccentricity, have been introduced, e.g. by Ginzburg [1] and Kugi et al. ... external roll surface for a non-circular geometry capable of reducing the ...

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Balance Quality Requirements of Rigid Rotors - IRD Balancing

Finally, a comparison of various balance quality grades is made with MIL-STD-167-1 and API balance limits. INTRODUCTION The International Standards Organization, ISO, published Standard 1940/1 "Balance Quality Requirements of Rigid Rotors," which has been adopted by the American National Standards Institute, ANSI, as S2.19-1975, "Balance Quality

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Online Eccentricity Monitoring of Seamless Tubes in Cross ...

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 piercing stage but only inspect the quality of finished tubes using ultrasonic testing (UT) at the end of all manufacturing processes.

  • Published in: Journal of Manufacturing Science and Engineering-transactions of The Asme · 2015Authors: Weihong Guo · Rui Chen · Jionghua JinAffiliation: University of MichiganAbout: Feature extraction · Vibration · Feature selection[PDF]Get Price