Research on vibration of a CSP rolling mill induced by workpiece excitation

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Journal of Vibration and Shock ›› 2023, Vol. 42 ›› Issue (20) : 222-229.

ZHANG Yifang, HE Cheng, CUI Li, WANG Caiyi

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Abstract

In order to study the strong "beat vibration" behavior of CSP(Compact Strip Production)rolling mill when rolling SPHC(Steel zhuanPlate shuHeat Commercial) steel, the industrial field experimental research on the rolling mill is carried on by using the monitoring instrument, and the signal characteristics of the rolling mill are obtained under the working conditions of rolling piece thickness periodic excitation, steel biting impact and rolling without strip. The experimental analysis shows that the rolling piece has an important influence on the dynamic characteristics of the rolling mill. The harmonicity of rolling force is obtained by establishing a mathematical model of rolling force under the influence of rolling thickness fluctuations. According to the field parameters, the Ansys/LS-DYNA is used to simulate the rolling process of the rolling mill to obtain the rolling force fluctuation curve and spectrum. The simulation conclusions are consistent with the theoretical study of mathematical models.On this basis, the mechanism that the generating rolling force harmonics and stimulating rolling mill vibrations by fluctuations thickness is analyzed. According to the coupling relationship between the thickness and speed of the rolling piece, vibration suppression experiments are carried out on the industrial site.The results show that the vibration frequency of the rolling mill is dispersed and the amplitude is greatly reduced by optimizing the speed of the rolling process.The research methods and conclusions provide a reference for similar vibration problems..

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compact strip production( CSP) rolling mill / industrial experiment;rolling piece excitation;rolling force fluctuation / rolling process simulation

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ZHANG Yifang, HE Cheng, CUI Li, WANG Caiyi. Research on vibration of a CSP rolling mill induced by workpiece excitation[J]. Journal of Vibration and Shock, 2023, 42(20): 222-229

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