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

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.