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김희술,허만성 嶺南大學校工業技術硏究所 1992 연구보고 Vol.20 No.2
On the assumption that a cutting system is a closed-loop system, a new method of analysis of the dynamic behavior in the cutting process is proposed. The dynamic cutting force models, which express the dynamic cutting force and the relative motions between tool and workpiece, are assumed to be a zero order system and first order system. The cutting stiffness force, cutting process damping force and dynamic cutting force and investigated theoretically and experimentally. The results are as foolows; (1) The first order system is adequate to the dynamic cutting force model. The influence of the cutting stiffness force on the dynamic force component is more dominent than that of the cutting process damping force. (2) Most of the dynamic force components are originated from relative displacements and phase difference between cutting tool and workpiece near natural frequency of the cutting system. (3) When the ratios of the cutting stiffness force and cutting process damping force are similar, the dynamic force components show minimum.