ROUGHNESS, AMPLITUDE DISTRIBUTION AND BEARING AREA CURVE DURING CNC MACHINING OF Al7SiMg

Abstract

The paper analyzes the roughness of surfaces obtained by CNC machining on a
HAAS VF-1 center, using an Al7SiMg type material. The study presents general
notions about microgeometrical precision, roughness parameters and their
influence on the functioning of machine parts, such as wear resistance, corrosion,
adjustments and fatigue limit. In the experiments, three faces of a part called a
hydraulic distributor were processed, using drill, cylindrical-frontal end mill and
frontal end mill tools. The roughness was measured on various surfaces using the
Surtronic SJ-210 Mitutoyo equipment, which provides precise results in numerical
and graphical form. The results include roughness values and graphs for each
analyzed surface, complemented by graphical representations, such as histograms
and distribution function curves. The study also highlights the interaction between
CNC machining parameters and surface quality, providing useful information for
optimizing the machining processes of aluminum alloy materials.