Open AccessDimensional accuracy and tolerances in additive manufacturing
Author(s) -
Samir Lemeš,
Nermina Zaimović-Uzunović,
Ernad Bešlagić,
Kenan Varda
Publication year - 2022
Language(s) - English
Resource type - Conference proceedings
DOI - 10.5644/pi2022.202.25
Subject(s) - flatness (cosmology) , stereolithography , benchmark (surveying) , coordinate measuring machine , computer science , cad , standard deviation , engineering drawing , mechanical engineering , mathematics , engineering , statistics , physics , geodesy , cosmology , quantum mechanics , geography
Important quality indicators for products made by Additive Manufacturing (AM) methods include dimensional accuracy, tolerances, and surface roughness. This paper describes a novel benchmark part designed and manufactured by a Low Force Stereolithography (LFS) 3D printer and controlled on a coordinate measuring machine. The benchmark part contains basic geometric shapes used to check the deviation from the nominal dimensions and given features from the 3D CAD model. We have developed an automatic measurement strategy based on a 3D object model and a control plan based on previously defined allowable tolerances. We have measured the deviation from nominal dimensions, positions, and form, including cylindricity, flatness and parallelism. The results revealed large deviations in dimensions and acceptable deviations in the shape of a manufactured benchmark part.