hot rolling mill roll eccentricity
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Roll Eccentricity Control for Strip Rolling Mills ...
1987-7-1 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 small levels of hysteresis can produce significant thickness errors, • eccentricity effects may be different from one side of a mill
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Active compensation of roll eccentricity in rolling mills ...
1998-10-15 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 new methods for the active ...
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Neural network for identification of roll eccentricity in ...
1996-6-15 The roll eccentricity in a rolling mill may define the limit of achievable thickness tolerances and thus is subject of interest for the automation equipment in hot rolling mills as well as in cold rolling mills. Today's demand on thickness tolerances less than 0.8% require efficient methods for roll eccentricity identification and compensation.
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Active compensation of roll eccentricity in rolling mills ...
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 new methods for the active ...
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Online Monitoring System Design for Roll Eccentricity
This paper deals with the parameter estimation and online monitoring of roll eccentricity in rolling mills. Roll-eccentricity-induced disturbances can result in strip thickness
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Active compensation of roll eccentricity in rolling mills ...
IEEE Xplore, delivering full text access to the world's highest quality technical literature in engineering and technology. IEEE Xplore
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Method of measuring and compensating roll
The objects are achieved in accordance with the present invention by providing a method of measuring and compensating the roll eccentricities of the rolling mill, the method further comprises an off-line eccentricity identification method and an on-line eccentricity compensation method.
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Online Eccentricity Monitoring Weihong Guo of Seamless ...
2019-10-28 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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Hot Rolling Mill Hydraulic Gap Control (HGC) thickness ...
2015-11-4 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 can be seen in Figure 1.
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Strip Thickness Control of Cold Rolling Mill with Roll ...
2014-1-13 trolling the roll gap position is such that produces the desired output thickness [6]. Roll eccentricities are caused by axial deviations between the roll barrel and the 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.
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Active compensation of roll eccentricity in rolling mills ...
1998-10-15 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 new methods for the active ...
Read More
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how to ntrol eccentricity problem in hot rolling mill
Rolling mill roll eccentricity control Kaiser Aluminum. 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 other disturbances during the rolling process are compensated and a rolling speed dependent adaptive PI controller is developed to accomplish fine ...
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Roll Eccentricity Control Using Identified Eccentricity
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. When there is a large difference of diameters between top and bottom back up roll, the performance of roll eccentricity control using ...
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The Complete Technology Book on Hot Rolling of Steel
Hot rolling mill thus helps in reducing the size of a metal thereby molding it into the desired form and shape. ... Passive roll eccentricity control methods Active roll eccentricity control methods Preventive roll eccentricity control methods Dead Band Method Roll Force Method
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rolling mills eccentricity
rolling mill roll eccentricity control - proficiency-fp7 rolling mill roll eccentricity control. Method of measuring and compensating roll eccentricity of a rolling ... Jan 26, 1993 ... A method of correcting the thickness variations of a rolling plate by controlling atleast one of the top or bottom backup rolls of a rolling mill. Get Price
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Method of measuring and compensating roll
an off-line 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 off-line eccentricity identification method determining the eccentricity values of N first points which equally divide a circumference of the top backup roll ...
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Online Eccentricity Monitoring Weihong Guo of Seamless ...
2019-10-28 Online Eccentricity Monitoring of Seamless Tubes in Cross-Roll Piercing Mill 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
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Real-time Detection of Roll Eccentricity for Cold Strip Mills ...
Roll eccentricity is caused by both work rolls and backup rolls and is periodic and sinusoidal in nature. However, in practice the amplitude, frequency and phase of eccentricity signal are time-varying and the accuracy of detecting eccentricity is depending on measured roll force which is corrupted by hysteresis and nonlinearity effect.
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Polynomial LQG control of back-up-roll eccentricity
1994-6-1 Chicharo and Cold rolling steel mill control 979 Ng (1990) recently proposed a new roll eccentricity sensor based on a modified comb filter. Katori et al. (1992) returned to the use of control design and disturbance discrimination to solve the Back-Up-Roll eccentricity problem.
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Dave Knapp – TelePro, Inc.
An encoderless roll eccentricity compensation system for rolling mills and sheet casters; Shop floor inventory and production tracking systems for hot rolled plate and coiled products and for sheet finishing operations; A standard hydraulic mill stand control product for rolling mills
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how to ntrol eccentricity problem in hot rolling mill
Rolling mill roll eccentricity control Kaiser Aluminum. 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 other disturbances during the rolling process are compensated and a rolling speed dependent adaptive PI controller is developed to accomplish fine ...
Read More
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Roll Eccentricity Control Using Identified Eccentricity
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. When there is a large difference of diameters between top and bottom back up roll, the performance of roll eccentricity control using ...
Read More
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methods to control eccentricity in forged rolls - MC
hot rolling mill roll eccentricity. methods to control eccentricity in forged rolls Roll eccentricity is a periodic disturbance caused by a structure of back up rolls in rolling mills 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 ...
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rolling mills eccentricity
rolling mill roll eccentricity control - proficiency-fp7 rolling mill roll eccentricity control. Method of measuring and compensating roll eccentricity of a rolling ... Jan 26, 1993 ... A method of correcting the thickness variations of a rolling plate by controlling atleast one of the top or bottom backup rolls of a rolling mill. Get Price
Read More
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The Complete Technology Book on Hot Rolling of Steel
Hot rolling mill thus helps in reducing the size of a metal thereby molding it into the desired form and shape. ... Passive roll eccentricity control methods Active roll eccentricity control methods Preventive roll eccentricity control methods Dead Band Method Roll Force Method
Read More
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Online Eccentricity Monitoring Weihong Guo of Seamless ...
2019-10-28 Online Eccentricity Monitoring of Seamless Tubes in Cross-Roll Piercing Mill 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
Read More
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Method of measuring and compensating roll
an off-line 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 off-line eccentricity identification method determining the eccentricity values of N first points which equally divide a circumference of the top backup roll ...
Read More
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Real-time Detection of Roll Eccentricity for Cold Strip Mills ...
Roll eccentricity is caused by both work rolls and backup rolls and is periodic and sinusoidal in nature. However, in practice the amplitude, frequency and phase of eccentricity signal are time-varying and the accuracy of detecting eccentricity is depending on measured roll force which is corrupted by hysteresis and nonlinearity effect.
Read More
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Rolling Technology and Theory for the Last 100 Years:
A new rolling mill with higher ability to control strip crown-shape than conventional 4Hi mills was developed in 1974, which was called HC mill. 57) As this rolling mill with 6Hi structure could made work-rolls to be small, the control characteristic of deformation shape of rolls was improved by shifting a middle roll in the width direction ...
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Dave Knapp – TelePro, Inc.
An encoderless roll eccentricity compensation system for rolling mills and sheet casters; Shop floor inventory and production tracking systems for hot rolled plate and coiled products and for sheet finishing operations; A standard hydraulic mill stand control product for rolling mills
Read More