Testing of the Surface Roughness Parameters of Aluminium-Lithium Parts Machined by Milling

Abstract

This paper examines the influence of technological parameters (elements of the cutting process) on the roughness of the surface in the milling process of a part of aluminium-lithium alloy. The aim of the paper is to analyse the impact of cutting speed, feed speed and depth of cut on the roughness parameter Ra. The machine tool, tool used, the material and the device for measuring of the roughness parameters are shown. An adequate mathematical model was developed by statistical analysis, which describes the effect of technological parameters on roughness. The results of the experiments are presented in table and graphic and are suitable only for observed cutting conditions, used tools and material.