機械構造の非線形性を考慮した自励びびり振動のシミュレーション解析(第1報) : 1自由度非線系構造モデルの場合の解析

概要

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The paper presents a structure model with single degree of freedom which may represent the non-linear characteristics of actual machine tool structure. By using an experimental set-up for orthogonal turning which utilizes the proposed structure model, it is shown that the non-linear variations of vibration parameters m, k, c with applied load can be measured with a special impulsive excitation technique during the actual turning. The obtained variations are proved to be quite similar to those obtained for usual turning lathe. Computer simulations of chatter on-set process are then carried out with taking both the variable m, k, c obtained and the non-linearity of cutting process reported in the previous papers into account. The predicted stability thresholds of chatter vibration through the simulation are in good quantitative agreement with the experimental results which include the well-known non-linear phenomena such as high feed and high speed stabilities of chatter and the fmite amplitude chatter vibration.
公益社団法人精密工学会の論文
2000-12-05