Title: New perspective in process optimisation of variable pitch milling

Authors: H. Fazelinia, N. Olgac

Addresses: Mechanical Engineering Department, University of Connecticut, Storrs, CT 06269-3139, USA. ' Mechanical Engineering Department, University of Connecticut, Storrs, CT 06269-3139, USA

Abstract: Stability analysis of variable-pitch milling process offers a mathematically challenging task due to the complex nature of the ensuing regenerative chatter dynamics. It can be reduced to a problem of stability assessment of a Linear Time-Invariant (LTI) Systems with multiple independent delays. This problem can be solved by a recent paradigm; the Cluster Treatment of Characteristic Roots (CTCR). This paper suggests an optimisation procedure based on the CTCR. The objective function entails two compromising components: to maximise the metal removal rate while creating the best chatter rejection ability. The end result determines both the cutter geometry and the operating conditions.

Keywords: high speed machining; optimisation; stability analysis; regenerative chatter; DDE; delayed differential equations; CTCR; cluster treatment of characteristic roots; variable pitch milling; chatter dynamics; vibration; cutter geometry; operating conditions.

DOI: 10.1504/IJMPT.2009.025213

International Journal of Materials and Product Technology, 2009 Vol.35 No.1/2, pp.47 - 63

Available online: 16 May 2009 *

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