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Abstract：
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The abnormal vibration of rolling mill system is an important factor affecting the quality of workpiece. Through the field test and analysis of the six-roll cold rolling mill 2180 in a steel mill, the abnormal vibration of the work roll was transmitted to the main transmission system, which results in the failure of the gear box and other parts. However, the universal joint shaft did not effectively cut off vibration transmission. Based on the actual parameters, a mathematical model of the coupled vibration of the rolling mill including torsional vibration of main transmission system and vertical vibration of work roll was established, and the response characteristics of the system were solved. At the same time, the existence of vertical torsional coupled vibration of rolling mill was found by simulation analysis. Furthermore, quantitative analysis shows that the changes of work roll torsion angle and vibration displacement are relatively large during coupling vibration of the system，and the torsional vibration effects on the vertical vibration are more obvious. This method provides a theoretical reference for suppressing the vibration of rolling mill system and reducing equipment failure.
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Funds：
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国家自然科学基金资助项目（51375019）
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AuthorIntro：
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刘文彦(1972-)，男，硕士，讲师
E-mail：lwy197210@126.com
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Reference：
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