Phase Characteristics of Self-Excited Chatter in Cutting

[+] Author and Article Information
N. Kasahara

Power Reactor & Nuclear Fuel Development Corp., Oarai-machi, Ibaraki 311-13

H. Sato

Mechanical Engineering Laboratory, AIST, MITI, 1-2, Namiki, Tsukuba, Ibaraki 305

Y. Tani

Institute of Industrial Science, University of Tokyo, 22-1, Roppongi 7 chome, Minato-ku Tokyo 106

J. Eng. Ind 114(4), 393-399 (Nov 01, 1992) (7 pages) doi:10.1115/1.2900689 History: Received April 01, 1989; Revised October 01, 1991; Online April 08, 2008


The behavior of the self-excited chatter in cutting was investigated from the space phase point of view; the space phase is defined as that between outer and inner modulation. Records of oscillation for the horizontal motion of the work and those for the horizontal component of the cutting force were stored in a newly developed measurement system. The amplitude of the vibration increases for decreasing cutting speed and vice versa, the amplitude for the cutting force does not increase as the amplitude of the work motion does. Amplified and damped amplitudes for the decreasing and the increasing cutting speed are shown to be closely related to decreasing and increasing space phases, respectively. The mechanism of this phenomenon was analyzed on the complex plane by taking the cutting dynamics and the structural compliance into account. Attempts to suppress the chatter amplitude were conducted on the basis of these phenomena.

Copyright © 1992 by The American Society of Mechanical Engineers
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