Abstract
At present, the commonly used hot rolling model is only applicable to the static rolling process. However, to study the dynamic rolling process, a dynamic rolling model with roll vertical movement velocity parameters is required. In this study, the influence of the vertical movement velocity of the rolls on the rolling process is considered, and a dynamic rolling process model is proposed when the roll gap is reduced during the hot rolling dynamic rolling process. Mathematically, the model is based on the upper limit method. The model considers the influence of the dynamic rolling process on the length of the deformation zone, establishes a dynamic velocity field model and an average deformation rate model, and then solves the total power of the rolling process. Finally, the dynamic rolling force equation is given. Compared with the experimental results, the dynamic rolling model in this paper has high accuracy with an average error of 4%. In addition, the influence of roll vertical velocity on rolling parameters is discussed, which provides a basis for the study of the dynamic rolling process.
Highlights
IntroductionAn accurate rolling model is a key to producing high-quality steel products
The model established based on the static rolling process is not suitable for the dynamic rolling process
This paper aims to establish a dynamic rolling model based on the energy method of the roll gap reduction process
Summary
An accurate rolling model is a key to producing high-quality steel products. The research on the static rolling process has been relatively complete. The changing law of the parameters is different from static rolling, referred to as the dynamic rolling process. The model established based on the static rolling process is not suitable for the dynamic rolling process. It is difficult to predict the parameters of the dynamic rolling process accurately. A clearly defined mathematical model must be established to study the dynamic rolling process comprehensively. The typical dynamic rolling mainly includes the vibration phenomenon during the rolling process, variable thickness rolling, etc. The establishment of the dynamic model provides more accurate predictions for the dynamic rolling process and enriches the rolling model
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