No. 1688, Gaoke East Road, Pudong new district, Shanghai, China.
No. 1688, Gaoke East Road, Pudong new district, Shanghai, China.
basic rollimg mills – Grinding Mill China. 187 MTW Milling Machine 187 SCM Ultrafine Mill Complete Hot Rolling Mills Design Housingless Vertical Mill Stand Modelling and control of …
The invention relates to the control of rolling mill backup roll eccentricity by combining the load carrying characteristics of rolling mill tapered roller bearing assemblies during rolling with prescribed levels of axial thrust to effect a controlled deflection of backup roll necks on a 4-high rolling mill or the like due to the selected thrust force applied axially to the ends or necks of ...
how to ntrol eccentricity problem in hot rolling mill. how to ntrol eccentricity problem in hot rolling mill. P kucsera et al hot rolling mill hgc thickness control improvem ent 102 where v is mill speed and l is the distance bet ween the wo rk ro lls and the x ray. If you want to learn about our products please call or write mail consultation.
PURPOSE: An eccentricity control apparatus of hot rolling rolls is provided to use appropriate gains according to type of steel and temperature of product by automatically selecting gains according to type of steel and temperature of product so that roll eccentricity compensation is outputted with the most ideal gains being applied.
hot rolling mill roll eccentricity Cold Rolling Mill Thickness Control Using The Cascade-Correlation, Backup Roll Thickness gauge, Application of Dynamic Deadband Eccentricity Filter in GM-AGC, The problem of roll eccentricity has become one of important factors to affect the quality of strips as downstream industries require ....
John G. Lenard, in Primer on Flat Rolling (Second Edition), 2014 2.7 Generation III Coil Box Hot Strip Mills. In the 1970s, Stelco of Canada developed the hot coil box designed for installation in hot strip mills ahead of the finish mill for coiling the transfer bar from the roughing mill and uncoiling it into the finishing mill.
methods to control eccentricity in forged rolls. hot rolling mill roll eccentricity - BINQ Mining Dec 20, 2012 Roll Eccentricity Control Using Identified Eccentricity of Top, roll eccentricity, back up roll, hot strip mill, repetitive, Roll eccentricity is a periodic disturbance caused by a structure of back up rolls in rolling mills,...
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.
A method of rolling material in a rolling mill in which the material is directed from an unwind coil of the material to the mill and/or to a rewind coil of the material from the mill, the material being under tension as it is directed to and from the mill. The directing process has at least one cyclic disturbance which ordinarily causes cyclic changes in the tension of the material and in the ...
An in-depth review of the roll eccentricity control design problem is provided which encompasses a number of recent, novel, design contributions and i…
SIMULATION RESULTS In eccentricity control, the following practical considerations apply to production rolling mills and thus should be cons idered in the des ign of relevant simulation studies: • the incoming feed can introduce periodic disturbances in the form of hot rolled thickness disturbances or uncoiler induced tension fluctuations, • apparently …
ep0435595a2 - thickness control system for a rolling mill . A rolling mill (32) has a hydraulic roll-gap control system (66) for setting the roll gap between two work rolls (3, 4) of the rolling mill and a mill modulus control unit (54) for supplying a correction signal (C p ) to the hydraulic roll-gap control system based on the difference between a reference rolling pressure and the …
Active compensation of roll eccentricity in rolling mills Abstract: ...
Study on Roller Eccentricity Compensation in a Cold Mill. 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 …
Jun 01, 1994 It is a strength of the polynomial systems viewpoint, that such modifications are not usually too severe as will be seen in the sequel for the eccentricity control problem The control of a rolling mill requires the output gauge to be regulated in the face of eccentricity and input hardness disturbances using measured rollforce
PURPOSE: To solve such a problem that angle detecters must be also detached when changing back-up rolls. CONSTITUTION: The period and amplitude of the wave of roll eccentricity are calculated by measuring rolling load, detecting the rotational angles of work rolls 2, 3, converting the rotational angles of the work rolls into the rotational angles of the back-up rolls 4, 5 and …
How To Control Eccentricity Problem In Hot Rolling Mill. Multiresolution wavelet method for roll eccentricity. rolling and the equipment performing the deformation of the steel plate is called a hot thickness control therefore tends to amplify the effect of roll eccentricity. PDF Strip Thickness Control of Cold Rolling Mill with.
how to control eccentricity problem in hot rolling mill. Rolling Mill Tutorial Before continuing make sure you have read Chapter 5 Another control problem bes Active compensation of roll eccentricity in rolling mills ...
The invention provides a new apparatus for the detection measurement and display of roll and roll bearing eccentricity in a rolling mill and also an apparatus for correction of such eccentriciti The apparatus comprises individual narrow band-pass filter modules each dedicated to the detection and development of a signal corresponding to one eccentricity such as fundamental …
This paper is concerned with the active compensation of the roll eccentricity-induced periodic disturbances in the strip exit thickness of hot and cold rolling mills. The roll eccentricity may be caused by different reasons, like e.g. inexact roll grinding or nonuniform thermal expansion of the rolls. The increasing demands on the thickness tolerances require …
Rolling Mill Roll Eccentricity Control orosertegyesulet eu ness in hot rolling mills can be aboutμπι and more Roll eccentricities arise from axial deviationscontrol of the hydraulic piston and the active eccentricity Chat Online how to control eccentricity problem in hot rolling mill hot rolling mill roll eccentricity Loop .
How To Control Eccentricity Problem In Hot Rolling Mill. 0183;32;hot rolling practice – an attempted recollection saral dutta. b. tech. . higher productivity and close control of final product than other forming processes. . this is the starting point of the hot rolling mill practice. Learn More
The control concept comprises a plug-in controller based on the projection theorem in a Hilbert space for the active compensation of roll eccentricity-induced periodic vibrations that appear as periodic disturbances in the strip exit thickness. This paper is concerned with the controller design for the position control of the hydraulic adjustment system within the AGC (automatic gauge …
DOI: 10.1524/auto.1999.47.8.342 Corpus ID: 111540017. Position Control and Active Eccentricity Compensation in Rolling Mills @inproceedings{Kugi1999PositionCA, title={Position Control and Active Eccentricity Compensation in Rolling Mills}, author={Andreas Kugi and Kurt Schlacher and Georg Keintzel}, year={1999} }
In most mill vibration models, either the roll mass is usually limited to vibrate in vertical direction and vertical-horizontal directions, or the multiple rolls system... | Milling, Cold Rolling ...
Firstly this paper proposes a lumped-parameter hot-rolling mill model. The rolling mill examined is reversible and equipped with an independent speed control system for each work roll (two single ...
Roll Eccentricity Control for Strip Rolling Mills ... 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) CYCLES/PRODUCT Tandem cold mill First 0.3 100-400 Tandem hot mill First …
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. ... Advantages arising from the design are suitability for hot and cold 4-high rolling mills, with or ...
Roll Eccentricity Control for Strip Rolling Mills ... 01/07/1987 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.
The present invention relates to an automatic roll eccentric control apparatus of a hot rolling facility which measures roll eccentricity of a plurality of rolling mills provided in a rolling facility and compensates the position of the rolling mill with the greatest roll eccentricity, thereby minimizing the amount of deviation of the rolling.
2007 7 1 This paper considers some of the control issues in hot rolling mills Hence to set the context first we give a brief description of a typical process The role of a hot strip mill process is to roll the slabs produced in a continuous casting process and produce strips of thickness 0.8–20 mm Fig 1 shows
Active compensation of roll eccentricity in rolling mills. This paper is concerned with the active compensation of the roll eccentricity induced thickness …