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appliion of an agc in hot strip rolling mills

Improvement and application of Automatic Gauge Control ...

27/06/2008  Improvement and application of Automatic Gauge Control system in hot strip rolling mills Abstract: Mill Modulus Control (MMC) is one of important methods on Automatic Gauge Control (AGC) systems of strip rolling mills. It would result in a slower adjusting speed of strip rolling gap to combine the former AGC system and MMC simply without changing the compensating coefficient of rolling ...

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Research on Mill Modulus Control of Strip Rolling AGC ...

The novel GM-AGC system has been applied successfully in a hot strip mill, the application results show that the thickness control precision is improved significantly, with the novel GM-AGC system ...

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Algorithm design and application of novel GM-AGC based

16/03/2014  The novel GM-AGC system has been applied successfully in a hot strip mill, the application results show that the thickness control precision is improved significantly, with the novel GM-AGC system, over 98.6% of the strip thickness deviation of 3.0 mm class can be controlled within the target tolerances of ±20 μm.

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Research on application of Smith predictor to monitor AGC ...

Research on application of Smith predictor to monitor AGC in hot strip rolling mills

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Application of Singular Perturbation Control Technology in ...

Application of Singular Perturbation Control Technology in the Control of Hot Strip Rolling ... used hydraulic AGC, the strip thickness quality indicators have been greatly improved, the thickness deviation of + 50 µm, thickness, with a total length of hit rate reached more than 95%; in the 1990s to the present, the hot rolled strip control technology and the development of new, thickness ...

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Flatness Control System for Hot Strip Mills - ScienceDirect

01/08/1981  Flatnes~ Control System for Hot Strip Mills Effect on Automatic Gauge Control Automatic gauge control (AGC) of final stand of finishing mill had not been used before flatness control was developed. The main reason is that when AGC of final stand is activated, the variation in rolling force injures flatness of the strip. Flatness con­trol has made AGC of final stand more practi­cal. By using ...

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Research and Application on Spring Model of Hot Strip Mill ...

Spring model is important restrictive factors to improve the precision of AGC control system. To improve the accuracy of strip gauge control, Study on various influencing factors of spring model has important significance in rolling process. Therefore, using ABAQUS finite element software, this paper establishes the whole stand model of strip rolling.

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Online Parameter Estimation for Adaptive Feedforward ...

posed control approach obtained from an industrial hot strip rolling mill show a signicant improvement of the strip thickness accuracy compared to the existing standard controllers. The proposed adaptive feedforward control strategy is now in permanent operation at the considered rolling mill. Nomenclature Abbreviations AGC Automatic gauge control BR Backup roll Address all corresponds to this ...

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Adjusting Rolling Speed and Thickness to Help Ensure

The Hot Finish mill forms the strip to the final dimension. Not only does temperature plays a crucial part in these processes as it dictates the quality of the surface finish and sheet thickness, but so does speed. As I mentioned, the metal is subjected to tons of pressure and tensions of the high speed rolling process. The following table summarizes the typical thicknesses and rolling speeds ...

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Strip Rolling - an overview ScienceDirect Topics

S.M. Hwang, J.J. Yi, in Advances in Engineering Plasticity and its Applications, 1993. 1 INTRODUCTION. In hot strip rolling, a slab, usually a steel stock heated above the recrystallization temperature, is passed through the roll gap several times, with the gap being progressively reduced to achieve the desired final dimensions.Mill designers and operators are keenly interested in proper ...

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Stability and Accuracy of Agc-Systems in Hot Strip Mills ...

01/01/1983  Mill modulus variations and hysteresis -their effect on hot strip mill AGC. Iron and Steel Engineer, January 1977, 65-71. Wright, H. (1978). Applications and Advantages of hydraulic AGC. Iron and Steel International, December 1978, 381-390. Zeltkalns, A. (1977). Force Sensing in rolling mills. Iron and Steel Engineer, January 1977, 72-78. teady state error, we can again use the block diagram ...

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Application of MN-AGC Based on Intelligent Control in ...

Download Citation Application of MN-AGC Based on Intelligent Control in Continuous Hot Rolling It is always primary object to improve gauge control accuracy in hot strip mills. Limitation ...

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Algorithm design and application of novel GM-AGC

16/03/2014  The novel GM-AGC system has been applied successfully in a hot strip mill, the application results show that the thickness control precision is improved significantly, with the novel GM-AGC system, over 98.6% of the strip thickness deviation of 3.0 mm class can be controlled within the target tolerances of ±20 μm.

More

Application on neural PID control of MN-AGC in

Download Citation Application on neural PID control of MN-AGC in continuous hot rolling It is always primary object to improve gauge control accuracy in hot strip mills. Limitation based on ...

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Application of Singular Perturbation Control Technology in ...

Application of Singular Perturbation Control Technology in the Control of Hot Strip Rolling ... used hydraulic AGC, the strip thickness quality indicators have been greatly improved, the thickness deviation of + 50 µm, thickness, with a total length of hit rate reached more than 95%; in the 1990s to the present, the hot rolled strip control technology and the development of new, thickness ...

More

Research on Mill Modulus Control of Strip Rolling AGC ...

In order to improve the quality of the hot strip gage and to reduce the strip thickness deviation, the automatic gauge control (AGC) system now is widely used in modern hot strip mills. Mill modulus control (MMC) is one of important methods in AGC system for strip rolling mills. Control theories and models related to MMC were studied deeply in this paper. Its ability to eliminate strip ...

More

Research and Application on Spring Model of Hot Strip

Spring model is important restrictive factors to improve the precision of AGC control system. To improve the accuracy of strip gauge control, Study on various influencing factors of spring model has important significance in rolling process. Therefore, using ABAQUS finite element software, this paper establishes the whole stand model of strip rolling.

More

Application of a Strip Speed Measurement System for

01/10/2003  To enhance strip thickness accuracy and to improve the mass flow of the head end part of a strip in the 7-stand finishing mill using a hot strip measurement system, this study is being performed. In this paper, the speed measurement system layout and the applications of measured strip speed incluing a neural network for predicting a forward slip and a feed forward automatic control(FF AGC)

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Hot and cold strip rolling processes - ScienceDirect

01/10/2006  the multistage character of strip rolling on tandem mills where the strips is being bitten in several stands at the same time, ... Application to tube rolling on Mandrel Pipe Mill is demonstrated in . 3. A 3D, EVP, quasi-Eulerian steady-state model . In , , a 3D FEM of hot and cold strip rolling has been described. The behaviour can be either EVP or VP. Two slightly different steady state ...

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Rolling Technology and Theory for the Last 100 Years: The ...

In the case of strip rolling, it is general that there are 6 to 7 rolling mill stands in the finishing train of the hot strip tandem rolling mills, and there are 4 to 5 rolling mill stands in the cold strip tandem rolling mills. Explaining the case of cold strip mills for example, there are many rolling factors such as strip thickness at the entry and the exit of roll gap, tension between ...

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Algorithm design and application of novel GM-AGC

16/03/2014  The novel GM-AGC system has been applied successfully in a hot strip mill, the application results show that the thickness control precision is improved significantly, with the novel GM-AGC system, over 98.6% of the strip thickness deviation of 3.0 mm class can be controlled within the target tolerances of ±20 μm.

More

Application of MN-AGC Based on Intelligent Control in ...

Download Citation Application of MN-AGC Based on Intelligent Control in Continuous Hot Rolling It is always primary object to improve gauge control accuracy in hot strip mills. Limitation ...

More

Research on Mill Modulus Control of Strip Rolling AGC ...

In order to improve the quality of the hot strip gage and to reduce the strip thickness deviation, the automatic gauge control (AGC) system now is widely used in modern hot strip mills. Mill modulus control (MMC) is one of important methods in AGC system for strip rolling mills. Control theories and models related to MMC were studied deeply in this paper. Its ability to eliminate strip ...

More

Application of Singular Perturbation Control Technology in ...

Application of Singular Perturbation Control Technology in the Control of Hot Strip Rolling ... used hydraulic AGC, the strip thickness quality indicators have been greatly improved, the thickness deviation of + 50 µm, thickness, with a total length of hit rate reached more than 95%; in the 1990s to the present, the hot rolled strip control technology and the development of new, thickness ...

More

Hot Rolling Mill Hydraulic Gap Control (HGC) thickness ...

P. Kucsera et al. Hot Rolling Mill HGC Thickness Control Improvement – 98 – Another way to determine the thermal expansion of the work roll is the modelling of the heat transfer between the work rolls and the strip. This depends on the roll speed, strip thickness, the properties of the strip, roll gap, contact time and cooling parameters ...

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Research and Application on Spring Model of Hot Strip

Spring model is important restrictive factors to improve the precision of AGC control system. To improve the accuracy of strip gauge control, Study on various influencing factors of spring model has important significance in rolling process. Therefore, using ABAQUS finite element software, this paper establishes the whole stand model of strip rolling.

More

[PDF] Research and Application of Thickness Control ...

Thickness accuracy of plate production depends on Automatic Gauge Control (AGC) in the plate mill area. A typical modern thickness control system design and implementation of a steel plate mill is discussed together with the impact on the design of process models, available measurements, available control actuators and material properties. A highlevel software design approach provides the ...

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Adjusting Rolling Speed and Thickness to Help Ensure

The Hot Finish mill forms the strip to the final dimension. Not only does temperature plays a crucial part in these processes as it dictates the quality of the surface finish and sheet thickness, but so does speed. As I mentioned, the metal is subjected to tons of pressure and tensions of the high speed rolling process. The following table summarizes the typical thicknesses and rolling speeds ...

More

Rolling Technology and Theory for the Last 100 Years: The ...

In the case of strip rolling, it is general that there are 6 to 7 rolling mill stands in the finishing train of the hot strip tandem rolling mills, and there are 4 to 5 rolling mill stands in the cold strip tandem rolling mills. Explaining the case of cold strip mills for example, there are many rolling factors such as strip thickness at the entry and the exit of roll gap, tension between ...

More

Rolling (metalworking) - Wikipedia

Slabs are the feed material for hot strip mills or plate mills and blooms are rolled to billets in a billet mill or large sections in a structural mill. The output from a strip mill is coiled and, subsequently, used as the feed for a cold rolling mill or used directly by fabricators. Billets, for re-rolling, are subsequently rolled in either a merchant, bar or rod mill. Merchant or bar mills ...

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