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DetectionofNoncircularityandEccentricity ...

Time-varying eccentricity of the rolling winder is one of the major disturbances which affect the quality of the rolling winder. This unsuitable factor can lead to a web break for a high-speed winding process.

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Eccentricity - reliabilitydirectstore

Eccentricity is measured while the turbine is on slow roll (1 to 240 RPM below the speed at which the rotor becomes dynamic and rises in the bearing on the oil wedge) and requires special circuitry to detect the peak- to-peak motion of the shaft.

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Online Eccentricity Monitoring of Seamless Tubes in Cross ...

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 at the end of all manufacturing processes.

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Roll Eccentricity Phase Identification System - Scientific.Net

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.

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Measure properties of image regions - MATLAB regionprops

'Eccentricity' Eccentricity of the ellipse that has the same second-moments as the region, returned as a scalar. The eccentricity is the ratio of the distance between the foci of the ellipse and its major axis length. The value is between 0 and 1. (0 and 1 are degenerate cases.

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Roll Eccentricity Extraction Method Based on Comprehensive ...

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 system. Most roll eccentricity compensations extract the roll eccentricity based .

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AISTech Paper Form Version 8 140221 - Steel Plantech

Work Roll Shift Devices are equipped on No. 1 and No. 2 stands for the purpose of reducing edge drop by shifting work rolls with special contour for this purpose. Back-up Roll eccentricity compensation function is provided for No. 1 stand as well.

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Simulation and Analysis of Roller Eccentricity ...

With the increase request of strip quality, the roller eccentricity has become the important factor of influencing product quality. On the practical model of Cold-rolling Mill of 300, this paper establishes eccentricity compensation control practice of Cold-rolling Mill of 300 which applies wavelet transform method. Based on mufti-resolution decomposition of roll force signal by use of ...

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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.

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Fundamental Study of Roll Eccentricity Control using the ...

But, this method is known to worsen plate thickness accuracy by amplification of roll eccentricity effect which is an inner disturbance in hydraulic servo loop of screw down control. For this situation, at present, the method of fourier analysis of roll separating force to detect roll eccentricity vector is attempted.

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Roll eccentricity correction system and method ...

May 06, 1975 · Roll eccentricity correction system and method ... METHOD FOR DETECTING ECCENTRICITY AND PHASE ANGLE OF WORKING OR BACKING ROLL IN ROLLING MILL: ... The net roll eccentricity which acts on the roll gap at any time is the algebraic sum of four eccentricities for a four high mill and of two eccentricities for a two high mill. It is generally ...

  • Authors: Cook John WAffiliation: Westinghouse ElectricGet Price
Measurement Sensors | KEYENCE America

Laser Displacement Sensors (1D) Single point laser triangulation sensors for measuring distance and position with high speed, accuracy and precision.

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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.

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Roll eccentricity control system for a rolling apparatus ...

Oct 08, 1985 · A roll eccentricity control system for rolling apparatus in which a period of each cycle corresponding to one revolution of the roll is divided into a plurality of sections, a deviation in thickness of the rolled material in each section is sampled during the rolling operation, the sampled deviations in the respective sections for at least one period are averaged to determine a period average ...

  • Authors: Terushige Yamaguti · Toshinori Miki · Toshio Mannaka · Hiroshi Koyama · Yukihiro Ka.Affiliation: Get Price
Fix Second Monitor Not Detected on Windows 10 [Solved ...

Note: If the Roll Back Driver option grayed out, you can download a previous video driver from the manufacturer's website for your video card and install it on your Windows 10, or try the following Method 2. 5) When complete, restart your computer, and see if Windows can now detect your second monitor.

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FAULT DIAGNOSIS OF ROLL SHAPE UNDER THE SPEED .

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. The new method was induced from analyzing the rolling mechanism by using rolling force models, radius-speed relationship,

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Detection of Noncircularity and Eccentricity of a Rolling ...

Time-varying eccentricity of the rolling winder is one of the major disturbances which affect the quality of the rolling winder. This unsuitable factor can lead to a web break for a high-speed winding process.

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Milankovitch Cycles - and the Age of the Earth

Milutin Milankovitch was a Serbian engineer and meteorologist - born in 1879 he attended the Vienna institute of technology graduating in 1904 with a doctorate in technical sciences. He then went on to work in the University of Belgrade where he spent time working on a mathematical theory of climate based on the seasonal and latitudinal variations of solar radiation received by the Earth.

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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.

Get Price
Roll Eccentricity Phase Identification System - CORE

There are few detection methods which including rolling velocity. Roll eccentricity signal is difficult to directly measured, should fuse many kinds of detectable signal to be extracted through the data analysis which includes rolling force, roll gap, incoming thickness of rolled piece, exit .

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