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Apr 22, 2012· (Roll forming: ) This film takes you through the processes within a hot rolling mill. You''ll get to see the different stages all t...
The hot metal is passed between two rolls to flatten it, lengthen it, reduce the crosssectional area and obtain a uniform thickness. Hotrolled steel is the most common product of the hot rolling process, and is widely used in the metal industry either as an end product or .
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.
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.
hot rolling mill roll eccentricity 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.
PDF | This paper deals with the parameter estimation and online monitoring of roll eccentricity in rolling mills. Rolleccentricityinduced disturbances can result in strip thickness deviation and ...
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...
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, radiusspeed relationship, and measured rolling force, etc. Simulation results by using the field data show that the proposed method is very useful.
hot rolling mill roll eccentricity Rolling Mill Roll Eccentricity Control ness in hot rolling mills can be aboutμπι and more. Roll eccentricities arise from axial deviationscontrol of the hydraulic piston and the active eccentricity.
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.
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.
actuator applied backup roll crown bending effect rate coefficient coil cold rolled courtesy of Iron crown control dead band displacement edge drop edger exit feedforward finite element analysis Flat Rolling frequency gage gap control system hot rolled hot strip mill hydraulic cylinders increase Iron and Steel Japan load cell Mae West maximum ...
The Hot Rolling Process The primary function of the Hot Strip Mill is to reheat semifinished steel slabs of steel nearly to their melting point, then roll them thinner and longer through 12 successive rolling mill stands driven by motors totaling 77,000 hp, and finally coiling up the lengthened steel sheet for transport to the next process.
PDF | In this article the AGC (Automated Gauge Control) system, of a hot rolling mill is analyzed and different methods are described to improve its performance. The mill stretch compensation and ...
an offline 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 offline 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 ...
Oct 18, 2017· Rolling is a metal forming process, in which stock of material is passed between one or more pairs of roller to reduce and maintain the uniform thickness. Rolling process is classified as hot ...
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
hotrolled coils, thereby effecting pass cutting in the coldrolling process. 3) To realize a highproductivity hotrolling mill by replacing the computer control system with one of the latest design that achieved a significant degree of automation. The expansion of the hot finisher to 4 stands, which was
Online Eccentricity Monitoring of Seamless Tubes in CrossRoll Piercing Mill Wallthickness eccentricity is a major dimensional deviation problem in seamless steel tube production. Although eccentricity is mainly caused by abnormal process conditions in the crossroll piercing mill, most seamless tube plants lack the monitoring at the hot
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
hot and cold rolling mills. The running speeds in hot rolling mill can be even 15 m/s. Those coexistent claims set new demands to the acceptable force variation level in the milling roll stands. mResearch problem The rolling assembly or roller unit consists of a set of rollers and its support structures. A rolling mill comprises a number of ...
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.
MINO Automation together with MINO Process Control has developed the technological architecture AVANTI™ TCS, which provides automatic flatness control and thickness control for ferrous and nonferrous rolling mills. The system is designed to be integrated or act as standalone package for new, revamped and upgraded rolling mills.
Hydraulic gap controls, with mill steer and roll eccentricity compensation. ... Linked to phase transformation when exiting the hot rolling mill along the run out table, the coiling step and at the coil yard level, the choice of finishing mill temperature, coiling temperature and temperature–time paths have a major influence on achieving ...
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