Study on the effects of technological parameters on surface quality characteristics in ultra-precision turning of diffractive surfaces on copper alloys

Abstract

This study evaluates the independent effects of machining parameters and spindle error motion (SE) on the surface quality characteristics of copper alloy diffractive surfaces in ultra-precision turning. A novel approach is proposed by integrating SE as a covariate to quantitatively assess its influence, alongside machining parameters. The results indicate that the geometric parameters of the microstructure and the surface quality are influenced by the machining parameters. Among these, the feed rate exhibits the most significant effect on the quality indicators, followed by the spindle speed. The depth of cut has no effect on surface roughness (Sa), a slight influence on the step height (SH), and a comparable effect to spindle speed on the sidewall angle (SWA). The SE does not affect Sa and SWA, and has only a minor influence on SH.