単粒による正面研削面のあらさ

Abstract

In face ground surfaces with crosshatched grooves, the surface roughness is very complicated because the grooves mutually interfere when they are produced. In order to research the mechanism to produce the roughness experimentally, as a model of face ground surfaces, brass test surfaces are face ground with a pyramidal diamond tool under various crosshatched angle ψ and pitch λn and the statistical quantities of the roughness are calculated. As a re-sult, roughly speaking, average height, standard deviation, skewness, kurtosis of the roughness distributions approach their theoretical values as ψ approaches 90° or λn increases. The influence of ψ on these values can be explicated by piling-up length ratio induced from the relation of balance between the ploughing force loaded on the uncut chip and its shearing resistance, that of λn can be explicated by the ratio of the theoretical values to the experimental values. Sharpness of periodicity increases as ψ approaches 30° or 150°, or λn increases. These can be explicated by periodic component and random component in power spectra.