Study on the Shape Target Curve Setting Model for Cold Rolling Strip

Abstract:

In order to automatically set the shape target curve, a model based on shape control theory is put forward. By coupling the shape forecast model and the shape discrimination model, the practical and strict shape target curve is researched. By combining strip plastic deformation model and rolls elastic deformation model, the shape forecast model is built. The shape discrimination is based on the strip element method. The main idea of the shape target curve is to minimize the shape crown in the first few passes on the condition that the strip is not unstable, in the last two passes to keep the good shape under the natural shape crown. Taking five-pass six-high rolling mill as an example, the convex strip is analyzed. The simulation and calculation results prove the validity and feasible of the shape target curve setting model. This model develops the shape target theory and lays the foundation of application of shape target curve in the rolling process of cold rolling.

• Periodical: Advanced Materials Research (Volumes 1049-1050)
• Pages: 916-919
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1049-1050.916
• Online since: October 2014
• Authors: Zhang Xian Zhao, Dong Cheng Wang, Hong Min Liu
• Keywords: Cold Rolling, Shape Crown, Shape Forecast Model, Shape Target Curve, Strip Shape

References

[1] LIAN Jiachuang, QI Xiangdong. Rolling theory and shape control theory[M]. Beijing: China Machine Press, 2013. (in Chinese).

[2] LIN Zhenbo. ABB shape measurement control system and shape standard curve[J]. Steel Rolling, 1994(4): 20-24. (in Chinese).

[3] ANDERS G Carlstedt, OLOV Keijser . Modern approach to flatness measurement and control in cold rolling[J]. Iron and Steel Enginees, 1991, 68(4): 34-37.

[4] LIU Hongmin, DING Kairong, LI Xingdong, et al. Theoretical computational method of shape standard curve[J]. Chinese Journal of Mechanical Engineering. 2008, 44(8): 137-142. (in Chinese).

DOI: 10.3901/jme.2008.08.137

[5] SUN Yabo, LIU Hongmin, PENG Yan. Establishment method of shape standard curve based on stepwise optimization and its compensation models. Chinese Journal of Mechanical Engineering. 2011, 24(1): 105-112.

DOI: 10.3901/cjme.2011.01.105

[6] X.Q. Liu: Shape simulation and mill type evaluation software development of cold rolling strip based on coupling model method(M. S, Yanshan University , China 2012), p.8.

[7] YU Bingqiang, SUN Yabo, LIU Hongmin, YOU Lei, PENG Yan. Compensation model for shape measuring of cold strip rolling. Journal of Iron and Steel Research, International, 2010, 17(6): 21-26.

DOI: 10.1016/s1006-706x(10)60108-2

[8] XU Lejiang. Flatness control in cold strip rolling and mill type selection [M]. Beijing: Metallurgical Industry Press, 2007. (in Chinese).

[9] LIU Hongmin, PENG Yan, CHU Yupeng, et al. Strip element method for shape discrimination of strip rolling[J]. communication in numerical methods in Engineering, 2004, 20(9): 709-720.

DOI: 10.1002/cnm.701