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http://dx.doi.org/10.3795/KSME-A.2012.36.4.429

Investigation of Unbalanced Mass of a Work Roll in a Cold Rolling Mill  

Kim, Young-Deuk (Dept. of Mechanical Engineering, Pohang University of Science and Technology (POSTECH))
Kim, Chang-Wan (School of Mechanical Engineering, Konkuk Univ.)
Park, Hyun-Chul (Dept. of Mechanical Engineering, Pohang University of Science and Technology (POSTECH))
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.36, no.4, 2012 , pp. 429-435 More about this Journal
Abstract
An abrasion due to continuous friction between a work roll and strip causes the mass of the work roll to be unbalanced in the rolling process. We developed a mathematical model for the rolling mill considering the unbalanced mass and verified the model experimentally. The work roll was approximated as a rigid rotor with eccentricity, and the effect of the unbalanced mass on chatter vibration was investigated. The joint forces computed by quasistatic analysis were applied to the work roll in the rolling mill. Transient responses were obtained, and frequency analysis was performed by solving equations of motion using a direct integration method. Horizontal vibrations were more strongly affected by eccentricity than vertical vibrations. In the horizontal direction, a small eccentricity of 1% of the work roll radius considerably increased the amplitude of the chatter frequency.
Keywords
Cold Rolling Mill; Mathematical Model; Unbalanced Mass; Chatter Vibration;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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