Interrupted machining-a Doubling in the Number of Stability Lobes? Part 1 Theoretical Development

Published

January 1, 2002

Author(s)

Matthew A. Davies, Jon R. Pratt, Brian S. Dutterer, Timothy J. Burns

Abstract

Traditional regenerative stability theory predicts sets of spindle speeds that are most resistant to the development of chatter.  Considering regeneration alone, these spindle speeds are approximately at integer fractions of the natural frequencies of the most flexible modes of the machine-tool structural loop.  However, for highly interrupted machining processes, where the ratio of time spent cutting to not cutting is small, the assumptions of the traditional theory break down.  This paper proposes a new stability theory for interrupted machining that predicts a doubling in the number of optimally stable speeds as the ratio of time spent cutting to not cutting is reduced. It is anticipated that the theory will be most useful for choosing optimal parameters in high-speed, finish-milling operations where the radial-depth-of-cut is only a small fraction of the tool diameter.

Citation

Journal of Manufacturing Science and Engineering-Transactions of the Asme

Volume

124

Pub Type

Journals

Keywords

Chatter, High speed machining, Machining

Citation

Davies, M. , Pratt, J. , Dutterer, B. and Burns, T. (2002), Interrupted machining-a Doubling in the Number of Stability Lobes? Part 1 Theoretical Development, Journal of Manufacturing Science and Engineering-Transactions of the Asme (Accessed April 26, 2024)