Journal
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
Volume 96, Issue 9-12, Pages 3793-3804Publisher
SPRINGER LONDON LTD
DOI: 10.1007/s00170-017-1448-x
Keywords
Layer-based manufacturing; Additive manufacturing; Surface roughness; Least square method; Centerline; Total least square, 3D printing, surface metrology
Funding
- Natural Science and Engineering Research Council of Canada (NSERC)
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A theoretical formula for surface roughness of layer-based manufactured parts in additive manufacturing is developed considering a more accurate definition of the centerline by minimizing the total arithmetic deviations of the actual surface profile. The developed model is experimentally validated, and it is compared with those that are used in common practices. Considering the uncontrolled process variables and the complexity of the numerical solutions, the analytical and experimental results show satisfying agreement. A methodology is also developed to decide whether the objective surface slope is feasible with the current number of layers and how the layers need to be laid down to achieve the desired surface accuracy. The methodology yields more accurate small features on the surfaces of the layer-based manufactured products.
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