Presentation time: 10:00-11:00, December 3, 2022 (Saturday)

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Speaker: Xiao Hong

Xiao Hong, Professor and doctoral supervisor, School of Mechanical Engineering, Yanshan University. He is mainly engaged in the research of extremely thin strip rolling theory, composite plate preparation method and modern numerical calculation method. He has presided over 1 national Key Research and Development Program project and 5 national Natural Science General Project projects. In the past five years, he has been the first author or corresponding author in Materials Science & Engineering A, Journal of Materials Processing Technology, and International Journal of Materials He has published more than 20 SCI papers in journals such as Mechanical Sciences, Materials & Design, ACS Applied Materials & Interfaces, and has won 7 provincial and ministerial Scientific and technological progress awards.

Introduction: In the early days of strip rolling mill, it was found that the thinner the strip was, the more difficult it would be to roll. When the thickness was less than a certain value, it could not make the thickness of the strip thinner by continuing to increase the pressure of the mill. People called it "minimum rolling thickness". In the 1950s, American scholar Stone gave a formula for calculating the minimum rolling thickness, which became the basis for the design of rolling mills and the formulation of rolling regulations, and promoted the development of rolling theory. However, in the application process, people found that there was a considerable gap between the calculation results of Stone formula and the reality. Some scholars adopted their own methods to modify it, but it was not widely recognized because of the lack of theoretical support. In this context, the paper first briefly expounds the derivation process of Stone formula and points out its theoretical problems. On this basis, based on the modern rolling theory, a new formula of "theoretical minimum rolling thickness" and a new formula of "conditional minimum rolling thickness" considering the rolling force limitation are derived, and the correctness of the proposed formula is verified by experiments. By further analyzing the Stone formula, the connotation of Stone formula is given, and a new suggestion for calculating the rolling force of extremely thin strip is put forward.

School of Mechanical Engineering

1 December 2022