Proceedings of the Korean Society for Technology of Plasticity Conference (한국소성가공학회:학술대회논문집)
- 2004.08a
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- Pages.175-183
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- 2004
The development and application of on-line model for the prediction of roll force in hot strip rolling
얼간 사상 압연중 압하력 예측 모델 개발 및 적용
- Lee J. H. (Mechanical Engineering Department, POSTECH) ;
- Choi J. W. (Mechanical Engineering Department, POSTECH) ;
- Kwak W. J. (POSCO Gwangyang Technical Research Laboratories) ;
- Hwang S. M. (Mechanical Engineering Department, POSTECH)
- Published : 2004.08.01
Abstract
In hot strip rolling, a capability for precisely predicting roll force is crucial for sound process control. In the past, on-line prediction models have been developed mostly on the basis of Orowan's theory and its variation. However, the range of process conditions in which desired prediction accuracy could be achieved was rather limited, mainly due to many simplifying assumptions inherent to Orowan's theory. As far as the prediction accuracy is concerned, a rigorously formulated finite element(FE) process model is perhaps the best choice. However, a FE process model in general requires a large CPU time, rendering itself inadequate for on-line purpose. In this report, we present a FE-based on-line prediction model applicable to precision process control in a finishing mill(FM). Described was an integrated FE process model capable of revealing the detailed aspects of the thermo-mechanical behavior of the roll-strip system. Using the FE process model, a series of process simulation was conducted to investigate the effect of diverse process variables on some selected non-dimensional parameters characterizing the thermo-mechanical behavior of the strip. Then, it was shown that an on-line model for the prediction of roll force could be derived on the basis of these parameters. The prediction accuracy of the proposed model was examined through comparison with measurements from the hot strip mill.