Prediction of Nano-surface Generation in Ultra-precision Diamond Turning from a New Materials Induced Vibration Model

摘要

In this paper, the development of a new materials induced vibration model for the prediction of nano-surface generation in ultra-precision diamond turning is presented. Materials induced vibration has its original in the variation of micro-cutting forces caused by the changing crystallographic orientation of the material being cut. It is a kind of self-excited vibration which is inherent in a cutting system for crystalline materials. The captioned vibration results in the anisotropy of surface roughness of a diamond turned surface. The study leads to the formulation of a model-based cutting system which takes into account the effect of machining parameters, the tool geometry, the relative tool-work motion as well as the crystallographic orientation of the materials being cut. Preliminary cutting experiments conducted to verify the system performance and the results were found to be satisfactory.