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Jul 19, 1977· Gage control system for rolling mill . United States Patent ... The eccentricity control unit serves to detect the roll eccentricity on the basis of a correlation principle and compensate for or cancel the effects of the feed back of the rolling pressure upon the occurrence of the roll eccentricity. ... it is an important problem ...
Advanced Process and Quality Control in Hot Rolling Mills Using Eddy Current Inspection Sven KLING, PRÜFTECHNK NDT, Ismaning, Germany Abstract. Eddy current testing is a common method for the surface inspection of semifinished products. The general trend today is to perform eddy current testing
accuracy in thickness control in metal rolling area. If the required accuracy of hot rolling mills can be achieved, then in some cases, cold rolling is not even required, which can result in a radical decrease of production costs. The schematic structure of a typical aluminum hot reversing rolling mill .
Mar 06, 1990· It has been discovered that variations in the thickness of metal strip entering and/or leaving a rolling mill resulting from cyclic conditions associated with coils of the strip that can be substantially reduced, if not eliminated all together, by direct application of the eccentricity control algorithm disclosed in Pat. Nos. 4,222,254 ...
Oct 18, 2017· ️First of all, Happy diwali to all my subscribers and viewers as well.️ Hello guys, I welcome you again in this new fresh topic. This topic is regarding the rolling process used for ...
how to control eccentricity problem in hot rolling mill Roll Eccentricity Control for Strip Rolling. An indepth 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 ...
Automation and Control in Iron and Steel Industries eolss. thickness and flatness of strip in hot and cold rolling mills. ... Nearly twothirds of the total weight of rolled products consists of flat, and only one ..... roll eccentricity control, the modeling of hydrodynamics and chemical processes in a newly...
and mass flow in hot rolling mills can be satisfied by proper control of the strip tension and looper angle. Figure 1 shows the tension and looper control in a typical finishing mill. Traditionally, looper angle control has been performed by changing the rotating speed of a main motor but there has been no tension feedback
CiteSeerX Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): 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. Instead, using a revolutionary control algorithm, FFF has proven in five installations in North and South America, that steelmakers need not replace their ...
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 ...
The reheat furnace and the rolling mill can be considered two of the main processes in a plate mill. The reheat furnace is used for heating steel blocks, which is the raw material for the rolling mill and the rolling mill is used for turning the steel block to a plate by making it wider, thinner and longer.
An indepth 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.
Secondary scale on hot strip and the impact on wear is another issue. Stresses from Hertzian pressure in 4high cold mill back up rolls were measured years ago, the results were never published, but of high interest also, maybe later. K. H. Schröder July 2003 K. H. Schröder: A BASIC UNDERSTANDING OF THE MECHANICS OF ROLLING MILL ROLLS
Eccentricity in Rolling Mills Xu Yang, Member, IEEE, Hao Luo, Minjia Krueger, Steven X. Ding, and Kaixiang Peng ... and roll eccentricity problem is the ... used one in hot/cold rolling mills is ...
Roll eccentricity is an important factor causing thickness variations during hot strip rolling and might define the limit of strip thickness control accuracy. An improved multiresolution wavelet transform algorithm was proposed to compensate for the roll eccentricity.
After the successful simulation study, the control concepts were implemented on the twostand cold rolling mill. In observation mode the functions for eccentricity and hardness compensation could be monitored and preoptimized in parallel to normal operation with no effect on the current operation of the mill.
9th INTERNATIONAL ROLLING MILL ACADEMY 59 November 2007 Glasgow, Scotland The lectures will be given by leading international experts in hot and cold mill control systems. As well as providing an indepth understanding of the theory they will also explain the practical issues of implementing rolling mill control systems.
Abstract: This paper is concerned with the active compensation of the rolleccentricityinduced periodic disturbances in the strip exit thickness of hot and cold rolling mills. The roll eccentricity may be caused by different reasons,, inexact roll grinding or nonuniform thermal expansion of the rolls.
Abstract: This paper is concerned with the active compensation of the roll eccentricityinduced periodic disturbances in the strip exit thickness of hot and cold rolling mills. The roll eccentricity may be caused by different reasons, like inexact roll grinding or nonuniform thermal expansion of the rolls.
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Strip Thickness Control of Cold Rolling Mill with Roll Eccentricity Compensation by Using ... constraints can be a tedious and challenging problem in many control applications [2]. ... the high precision of strip thickness, various types of Automatic Gauge Control (AGC) methods have been developed for hot or cold mill processes. The British ...
Roll Eccentricity Control Methods ... The Instrumentation and Computer Control of Hot Mills Introduction Pyrometers Thickness Gaging Monitoring the Profile of Hotrolled Strip Measuring the Flatness of Hotrolled Strip ... The Complete Technology Book on Hot Rolling of Steel ...
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 ...
Strip Thickness Control of Cold Rolling Mill with Roll Eccentricity Compensation by Using Fuzzy Neural Network Waleed I. Hameed, Khearia A. Mohamad Department of Electrical Engineering, University of Basrah, Basrah, Iraq ... been developed for hot or cold mill processes.
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