Research on Forward Slip Prediction Model for Ultra-thin Strip Rolling Process Based on Nonlinear Compensation of Roll Surface Displacement

doi:10.3901/JME.2025.16.146

Abstract

Abstract: As an important index parameter in the rolling process of ultra-thin strip, forward slip directly affects the rolling stability and the setting of process parameters. In order to forecast the forward slip in ultra-thin strip rolling process, by analysing the typical methods and results of forward slip calculation with Dresden’s formula, Fleck model and finite element method, it is concluded that Fleck's model has a strong adaptability in the calculation of the forward slip value in the ultra-thin strip rolling process. At the same time, considering the influence of the actual roll surface displacement in the deformation zone of ultra-thin strip rolling and the calculation error generated, the concept of the trend influence factor of the roll surface displacement on the forward slip value is proposed, and the influence of the trend influence factor on the forward slip under different reduction rates, coefficient of friction, yield strength, forward tension and unwind tension is analysed. Based on the optimal trend influencing factor and the 4th order polynomial compensation of roll surface displacement, and based on the random forest importance scoring of different working condition parameters on the compensation factor, a forward slip forecasting model for rolling process of ultra-thin strip based on the nonlinear compensation of roll surface displacement is established, and the model is verified, which realises the accurate forecasting of forward slip value of the rolling process of ultra-thin strip, and provides theoretical support for the stability of the rolling process of ultra-thin strip and the setting of the process parameter. This advancement shows significant potential for widespread industrial application.

Key words: ultra-thin strip rolling, forward slip, roll surface displacement, non-linear compensation, prediction

CLC Number:

TG335

REN Zhongkai, XU Yanan, CHEN Jiazhao, LIU Xiao, LIU Yaxing, WANG Tao. Research on Forward Slip Prediction Model for Ultra-thin Strip Rolling Process Based on Nonlinear Compensation of Roll Surface Displacement[J]. Journal of Mechanical Engineering, 2025, 61(16): 146-156.

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