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| Development and Application of Pressure-Equalizing Back-Up Roll Contour in Hot Strip Mill |
| WANG Xiao-dong1,LI Fei1,LI Ben-hai1,ZHANG Bao-hui2,WANG Lei2,CHEN Chao-chao1 |
1. Shougang Research Institute of Techonolgy, Shougang Group, Beijing 100043, China
2. Qian’an Iron and Steel Company of Shougang Group, Qian’an 064404, Hebei, China |
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Abstract CVC (Continuous Variable Crown) work roll contour technology since its invention was applied in more than 150 hot rolling mills throughout the world for controlling strip shape. However, in actual application, there were uneven wear on rolls or even roll spalling problems because contact pressure concentrations existed between work and back-up rolls when flat or CVC back-up roll was used for configuration with CVC work roll during the rolling. For solving these defects, a pressure-equalizing back-up roll contour with combination of VCR (Variable Crown Back-up Roll) and CVC back-up roll contours was designed and applied on a hot rolling mill. It not only has the feature of VCR back-up roll contour, but also can improve the contact condition between work and back-up roll. After the application of pressure-equalizing back-up roll contour, roll spalling problem was solved, and strip profile quality was also improved.
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Received: 19 September 2011
Published: 30 July 2012
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2012, Vol. 47 
