Analise da Rugosidade Superficial de Tubos Manufaturados por Impressão 3D

Abstract

The fast development of prototyping technologies allowed the optimization of engineering projects in several areas. On this paper was used methods to achieve an absolute value for the average superficial roughness parameter in pipes manufactured by 3D printing. The study is divided in two phases: first, testing three rectangular samples to determine the surface roughness value with a roughness meter, produced by a FDM printer VOID3D 1+ model. Second, the superficial roughness was defined by a friction head loss test done on a hydraulic bench with the conducts manufactured by the same material mentioned previously with different layer heights for them, which has influence on the average superficial roughness calculated. The results reached showed that although the found values have a great discrepancy, the decreasing tendency presented between the friction factor (f) and Reynolds number (Re) was kept, following the Moody's diagram leaning curves. In addition, the same proportion from the first experiment was sustained, when it was possible to see that the higher layer height (0.3 mm) has the lowest average superficial roughness and the lower layer height (0.1 mm) has the higher superficial roughness.