Stability Analysis on End Milling Al-SiC Metal Matrix Composite Material using Finite Element Analysis in Time (FEAT)

摘要

Machining of material Al-SiC Metal Matrix Composite (MMC) with the moderate speeds is beneficial in order to enhance productivity. This paper deals with the analytical prediction for stability criterion of an end milling process by using the finite element analysis in time (FEAT) method. This FEAT method forms a finite dimensional transition matrix as an approximation of the infinite dimensional monodromy operator. The analyses have been carried out for various radial immersions of end milling for two degrees of freedom (2-DOF) mechanical model. Stability prediction show that the regions of instability for end milling is about reversed at low immersions. The dynamic stability of the milling process is investigated through a mechanical model. The real model matrix has been identified in X, Y directions; the direct transfer function has been evaluated. The obtained stability models have been validated by comparing the models with experimental results.