A novel approach for the rolling force calculation of cold rolled sheet

作者:Peng, W.*; Ding, J. G.; Zhang, D. H.; Zhao, D. W.
来源:Journal of the Brazilian Society of Mechanical Sciences and Engineering, 2017, 39(12): 5057-5067.
DOI:10.1007/s40430-017-0774-0

摘要

The rolling force model was the core factor for the control system of the cold rolled sheet, the prediction accuracy affect the final flatness and the strip thickness directly. A novel approach for the rolling force prediction of cold rolled sheet was first proposed based on the plastic mechanics, in which the cylindrical velocity field was used to analyze the metal flow in the deformation region by the upper bound analysis in this paper. The analysis solution of rolling torque, rolling force and stress state coefficient are obtained by minimizing the total power which contain the internal plastic power, frictional power, shear power and tense power. Moreover, the effects of frictional factor, reduction ratio and the tense on the location of neutral point and stress state coefficient are discussed, respectively, and the validity of the proposed model was verified by comparing with the traditional models. The calculation process was programed and applied in the control system of one 1450 mm cold tandem mill successfully, the prediction results was in good agreement with the actual measured ones, and deviation proportion in the range of +/- 10.0% reached 97.3%, it can meet the requirements of the control system in cold rolling process.

  • 出版日期2017-12
  • 单位轧制技术及连轧自动化国家重点实验室; 东北大学