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| Influence of asymmetric flatness errors on strip wandering in continuous annealing lines |
| BAO Ren-ren1，ZHANG Jie1，LI Hong-bo1，JIA Sheng-hui2，LIU Hai-jun 2，LI Xian-jie2 |
1. School of Mechanical Engineering， University of Science and Technology Beijing， Beijing 100083， China
2. General Cold Rolling Plant， Wuhan Iron and Steel Co.， Ltd.， Wuhan 430083， Hubei， China |
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Abstract Asymmetric flatness errors have a great influence on strip wandering in continuous annealing lines，especially the edge buckle. In order to present the asymmetry of flatness，asymmetry ratio is introduced. The relationship between strip wandering distance and asymmetry ratio is analyzed，which shows when the average asymmetry ratio of a length of strip rises above 0.5，the wandering distance of strips also increases. On the basic of analysis a standard of strip flatness produced by cold rolling progress is determined，with which the number of strip break in annealing line caused by flatness errors falls from 8 times per year to 3 times per year.
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Received: 15 December 2014
Published: 28 April 2015
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2015, Vol. 50 
