Research on Asymmetric Shape Control Character and Generalized Overall Shape Control Strategy for Universal Crown Mill

2012 ◽  
Vol 48 (04) ◽  
pp. 58 ◽  
Author(s):  
Xiaochen WANG
Keyword(s):  
Control Strategy ◽  
Shape Control ◽  
Asymmetric Shape ◽  
Control Character

Research on Generalized Overall Shape Setting Control Models with Asymmetric Shape Control Function for UCM Mill

2011 ◽  
Vol 415-417 ◽  
pp. 478-486
Author(s):  
Xiao Chen Wang ◽  
Quan Yang ◽  
Zhi Guo Liang ◽  
Fei He
Keyword(s):  
Shape Control ◽  
Control Function ◽  
Control Device ◽  
Field Application ◽  
Control Methods ◽  
Control Models ◽  
Roll Bending ◽  
Asymmetric Shape ◽  
The Difference ◽  
Control Character

Towards the insufficiency of the research on asymmetric shape defects control, and the equipment of new asymmetric shape control device—inverse symmetric roll bending for UCM cold mill, in this paper, by ANSYS finite element simulation, high-precision rolls-strip coupling models were established, and the difference of control character among all the symmetric and asymmetric shape control methods were analyzed, then generalized overall shape setting control models with asymmetric shape control function was proposed. It was proved by field application that the control models can effectively control asymmetric and high-order shape defects with the coordination of all the symmetric and asymmetric shape control methods. Consequently, expansive research and apply prospect should be expected.

Asymmetric Shape Control Theory and Practice in Cold Strip Mills

2010 ◽  
Vol 145 ◽  
pp. 204-209 ◽  
Author(s):  
Xiao Chen Wang ◽  
Zhi Guo Liang ◽  
Quan Yang ◽  
Xiao Zhong Du ◽  
Hua Qiang Liu ◽  
...  
Keyword(s):  
Control Theory ◽  
Cold Rolling ◽  
Shape Control ◽  
Simulation Models ◽  
Rolling Process ◽  
Theory And Practice ◽  
Three Dimension ◽  
Control Effect ◽  
Asymmetric Shape ◽  
Roll System

In cold rolling process, asymmetric shape defects are still a common problem to strip quality. For the mills with inverse symmetry roll shifting system, different roll wear and thermal contour of top roll system and bottom roll system could cause asymmetric shape defects during shifting operation. In this paper, three dimension finite element simulation models of inverse shifting roll system were established to calculate the parameters and to analyze the effects. Based on the idea in the mill engineering that mill style option depended on the product grade, shifting weakness was evaluated and the opinion of limit shifting was suggested. To improve control effect to asymmetric shape defects in cold rolling, shape control system with asymmetric shape control ability is developed, including asymmetric edge drop control at upstream stands and asymmetric flatness control at last stand. The further improvement of asymmetric shape control theory and practice is the key way to reach the higher precision of shape quality in cold strip mills.

Research on Broken Edge Wave Control Strategy Caused by Edge Drop Control in UCMW Cold Tandem Rolling

2013 ◽  
Vol 655-657 ◽  
pp. 1525-1529 ◽  
Author(s):  
Lu Bing Wang ◽  
Lin Jing Yan ◽  
An Rui He ◽  
Yu Jing Liu
Keyword(s):  
Control Strategy ◽  
Shape Control ◽  
Work Roll ◽  
Control Model ◽  
Edge Wave ◽  
Effective Contact ◽  
Work Roll Shifting ◽  
Control Accuracy ◽  
Edge Drop ◽  
Wave Control

Taking MH UCMW cold tandem mill as research object, broken edge wave generating mechanism and characteristics were analyzed which caused by edge drop control. Based on original control strategy, an automatic edge wave control model was developed, and edge drop control strategy was optimized. Effect of taper work roll shifting and taper shape on broken edge wave were analyzed by actual rolling data. Results show that broken edge wave decreases with effective contact depth increasing of taper work roller and strip. Optimized control system application eliminate broken edge wave, and improve automatic shape control accuracy.

A Quantitative Shape Control Strategy for Hot Tandem Mill

2011 ◽  
Vol 314-316 ◽  
pp. 432-436
Author(s):  
Dong Cheng Wang ◽  
Hong Min Liu
Keyword(s):  
High Precision ◽  
Control Strategy ◽  
Shape Control ◽  
Difficult Problem ◽  
Distribution Scheme ◽  
Result Show ◽  
Industrial Demand

For modern hot tandem mill, various shape control means are equipped, so its shape control ability is strong. How to reasonably distribute every stand’s shape control ability is a difficult problem. If the distribution scheme is unreasonable, every stand’s shape control ability maybe waste or offset each other, eventually product’s shape quality is inevitable unsatisfactory. To achieve high precision shape control, a reasonably shape control strategy is necessary, whose job is to make use of every stand’s utmost shape control ability, with a constraint that every stand’s flatness must not be buckling, finally ensuring product’s flatness and crown meet industrial demand simultaneously. A quantitative shape control strategy is put forward by this essay, which is verified on a 1750mm hot tandem mill, the result show its practicability to improve product’s shape quality.

Research on the Edge Drop Control Strategy in Cold Tandem Rolling Mill

2012 ◽  
Vol 572 ◽  
pp. 110-113
Author(s):  
Xiao Min Zhou ◽  
Yang Jun Mao ◽  
Yun Feng Wu
Keyword(s):  
Control System ◽  
Control Strategy ◽  
Rolling Mill ◽  
Shape Control ◽  
Weak Point ◽  
Simulation Results ◽  
Edge Drop

Edge Drop Control is the weak point although it enriches the contents of the shape control in cold tandem rolling mill. In this paper, the existing edge drop control strategy is analyzed and the edge drop control strategy optimization is researched. The simulation results show that the optimized control system can effectively control the edge drop.

Research on Simulation of Hydraulic System of Bending Roll

2010 ◽  
Vol 145 ◽  
pp. 100-105
Author(s):  
He Yong Han ◽  
Hong Zhang ◽  
Jing Wang ◽  
Jun Wang ◽  
Qing Xue Huang
Keyword(s):  
Mathematical Model ◽  
Control Strategy ◽  
Pressure Fluctuation ◽  
Hydraulic System ◽  
Shape Control ◽  
Control Process ◽  
Effective Control ◽  
Key Technology ◽  
System A ◽  
Roller System

The hydraulic bending roller system, as a kind of most effective shape control process, has already become the key technology that used in shape control of the leveller at present. For hydraulic bending roller system, a mathematical model of dynamic characteristics of electro-hydraulic system was built .According to analyze the system, the parameters effect the pressure fluctuation of the system was obtained. A more effective control strategy was proposed to decrease the effect of the pressure fluctuation to the system.

A constrained control strategy for the shape control in thermonuclear fusion tokamaks

Automatica ◽  
2013 ◽  
Vol 49 (1) ◽  
pp. 169-177 ◽  
Author(s):  
Massimiliano Mattei ◽  
Carmelo Vincenzo Labate ◽  
Domenico Famularo
Keyword(s):  
Control Strategy ◽  
Shape Control ◽  
Thermonuclear Fusion ◽  
Constrained Control
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