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CHATTER ONSET IN NON-REGENERATIVE CUTTING: A NUMERICAL STUDY

✍ Scribed by J. GRADIŠEK; E. GOVEKAR; I. GRABEC

Publisher
Elsevier Science
Year
2001
Tongue
English
Weight
370 KB
Volume
242
Category
Article
ISSN
0022-460X

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✦ Synopsis

A non-linear model of non-regenerative cutting is analyzed. When damped, the model has a stable "xed point for small values of chip thickness. As chip thickness is increased, the "xed point becomes unstable via a sub-critical Hopf bifurcation. This transition corresponds to the onset of chatter. When dynamic noise is added to the system, chatter onset can occur in the sub-critical parameter region, although chatter-free cutting is predicted by the stability analysis of the "xed point. A noisy bifurcation diagram is compared qualitatively to a diagram obtained experimentally in regenerative cutting. Similar features regarding the onset of chatter are observed in both diagrams.

2001 Academic Press

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