Research on the Improvement Effect of High Tension on Flatness Deviation in Cold Strip Rolling

In the cold strip rolling process, tension plays a great role in the stability of rolling, reduction of rolling force and power consumption, coordination of thickness control, and improvement of flatness quality. The correcting and attenuating effect of tension on flatness deviation is gradually rev...

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Bibliographic Details
Published in:Steel research international 2014-11, Vol.85 (11), p.1560-1570
Main Authors: Wang, Xiao-chen, Yang, Quan, Jiang, Zheng-yi, Xu, Jin-wu
Format: Article
Language:English
Subjects:
Attenuation
Cold rolling
Deviation
Finite element analysis
finite element method
Flatness
Influence functions
Joining
Mathematical models
roll-strip-tension coupling model
shape control
Steel
Strip
Tension
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Summary:In the cold strip rolling process, tension plays a great role in the stability of rolling, reduction of rolling force and power consumption, coordination of thickness control, and improvement of flatness quality. The correcting and attenuating effect of tension on flatness deviation is gradually revealed, but quantitative analysis of their inherent effect is still insufficient. Thus, a roll‐strip‐tension coupling model with both accuracy and efficiency was established to analyze the influence of tension on flatness deviation. In the model, a strip plastic deformation model based on a 3‐dimensional differential method was corrected by a strip transverse flow factor obtained by an finite element method simulation model and was consequently combined with a rolls elastic deformation model based on the influence function method and the tension calculation module. By the coupling model, the mechanism of the self‐correction effect of front tension and the attenuation effect of back tension on flatness deviation was further discussed, and the calculation results of the corresponding correction coefficient and attenuation coefficient were obtained. The present paper brings more insight into the effect of tension on flatness, and lays a foundation for the optimization of the shape control model in the cold rolling process with tension. A roll‐strip‐tension coupling model with both accuracy and efficiency is established for cold rolling process with tension. Then the self‐correction effect of front tension and the attenuation effect of back tension on flatness deviation are analyzed by the calculation results of the model, and corresponding quantitative correction coefficient and attenuation coefficient are obtained.
ISSN:1611-3683
1869-344X
DOI:10.1002/srin.201400048