EXPERIMENTAL INVESTIGATION OF SURFACE QUALITY IN PLA 3D PRINTED COMPONENT USING A DOE APPROACH

Vlad Cristian ENACHE, Marius-Vali LAZĂR, Alexandru-Ionuț NICOLESCU, Angela-Miruna NEACȘU-PAVEL, Cristian-Vasile DOICIN, Mihaela-Elena ULMEANU

Abstract


Surface roughness is a critical quality parameter in 3D-printed components, influencing mechanical properties, aesthetic appeal, and functional performance. This study investigates the influence of key process parameters on the surface roughness of Polylactic Acid 3D-printed parts using a Design of Experiments approach. A structured experimental methodology was developed to analyze the effects of the default thickness, number of walls and infill density on surface quality, quantified through Ra measurements. The experiments were designed using a Taguchi orthogonal array to optimize parameter combinations while minimizing experimental runs. An ANOVA analysis and a regression model was performed to determine the significance of each factor. The study provides an optimized parameter set for improving the surface roughness of 3D printed parts.


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