圧延機チャタリングの振動解析（摩擦を考慮した２自由度系モデルによる解析）

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タイトル別名
  • Vibration Analysis of Chatter in Cold Rolling Mill (Theoretical Study on Self-excited Vibration by a Two-DOF Mass-Spring-Damper Model)
  • アツエンキ チャタリング ノ シンドウ カイセキ マサツ オ コウリョ シタ 2ジユウドケイ モデル ニ ヨル カイセキ

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説明

Two degree of freedom system represented by an equivalent mass-spring-damper describing chatter in sheet rolling is investigated. The dynamic behavior of the roll and excitation test indicated that chatter phenomenon is encountered in tandem cold mill wherein the roll stack vibrate in both vertical and horizontal directions. This paper assumes a friction model of the arc contact in roll bite which depends on the horizontal vibration of roll, and explains the vertical vibration in chatter is coupled with the horizontal one and therefore, both vibrations have influence on the dynamic behavior of the rolling force. The results of these analysis show the unstable area in the coefficient of friction producing a self-excited vibration and chatter phenomenon is caused by both excessive lubrication and inadequate one in the roll bites.

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