Transactions of Materials and Heat Treatment

Title：Comparative study on characteristics of multiple horizontal resonance states for tandem cold rolling mill

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ClassificationCode：TH113.1；TG335.1

year,vol(issue):pagenumber：2021,46(10):168-175

Abstract：

For the horizontal vibration phenomenon during the rolling process of work rolls for tandem cold rolling mill, a nonlinear horizontal vibration model of rolling mill roll system was established, and the amplitude-frequency characteristic equations of main resonance, super-harmonic resonance and sub-harmonic resonance for tandem cold rolling mill in the horizontal direction were solved by the multi-scale method. The simulation results show that the changes of rolling mill parameters and different resonance states have a significant impact on the amplitude, resonance point, resonance area and spine line position of system vibration. The system vibration is relatively stable in the sub-harmonic resonance state, but there are obvious jumping phenomena and unstable regions under the condition of the main resonance and super-harmonic resonance. Compared with the displacement dynamic response of the system, it is found that the positive and negative amplitudes of displacement for the sub-harmonic resonance response curve decrease and tend to be more symmetrical than that of the super-harmonic resonance, and it is beneficial to reduce the phenomenon of the bearing housing hitting the archway. Compared with the displacement bifurcation characteristics of the system, it is found that the system in different resonance state systems show different periodic motion laws as the amplitude of interference force changes. Thus, the above research provides parameter area and theoretical reference for suppressing the horizontal vibration of rolling mill.

Funds：

内蒙古自治区自然科学基金资助项目（2018LH05007）

作者简介：李丽（1981-），女，硕士，讲师 E-mail：33302618@qq.com 通信作者：李震（1973-），男，博士，教授 E-mail：lizhen_730106@126.com

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