In-Process Analysis of Machine Tool Structure Dynamics and Prediction of Machining Chatter

[+] Author and Article Information
Toshimichi Moriwaki, Kazuaki Iwata

Department of Mechanical Engineering, Kobe University, Rokko, Nada, Kobe, Japan

J. Eng. Ind 98(1), 301-305 (Feb 01, 1976) (5 pages) doi:10.1115/1.3438837 History: Received May 22, 1975; Online July 15, 2010


Theoretical and experimental investigations were carried out to identify the dynamics of a machine tool structure during cutting to predict the borderline of stability against the self-excited regenerative chatter. The validity of theoretical analyses in calculating the stability limit for conventional machining was confirmed by cutting experiments using a structural model. The model dynamics were identified during cutting under stable (non-chattering) cutting conditions by applying a technique of system identification based on time series analysis of the small random cutting force variations measured by a specially designed tool dynamometer and the corresponding minute vibrations. The experimentally obtained borderline of stability had a fairly good agreement with that calculated from the identified dynamics of the structure and the cutting dynamics, the latter being estimated from the static cutting data based on the so-called shear plane model.

Copyright © 1976 by ASME
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