動的切削過程の有限要素法解析

概要

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Dynamic cutting processes, such as wave removal operation and wave generation operation, were analyzed by elastic-plastic finite element method. Variation of undeformed chip thickness affects chip-forming process. Shear angle varies about 15° in wave removal operation under the conditions of wave length 2.65mm, amplitude 0.075mm and mean depth of cut 0.25mm. On the way of the chip thickness decreases, shear angle drops and the deformation concentrates. Strain distribution shows these phenomena clearly. It was also shown that depth of cut varies sinusoidaly but simulated cutting force waveform is distorted from sin-wave. It is because shear angle varies and the size of deformation area in the shear zone varies correspondingly. Thus the cutting force isn't in proportion to undeformed chip thickness at tool edge.
公益社団法人精密工学会の論文
2003-08-05