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Accuracy prediction in fused deposition modeling

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Abstract

Fused deposition modeling (FDM) is a common additive manufacturing (AM) technology able to fabricate physical prototypes directly from virtual model without geometrical complexity limitations. Initially used to create concept models to help product design stage, FDM developed as regard materials, accuracy, and the overall quality of the output improved, becoming suitable for end use. At present, it is employed in process chains to significantly shorten product development times and costs and to produce parts in small and medium batch. A critical drawback which inhibits its diffusion is the obtainable accuracy. Only few indications, relating the dimensional deviations, exist, and they are conflicting each other, not allowing a reliable prediction. In this paper, a geometrical model of the filament, dependent upon the deposition angle and layer thickness, has been developed in order to predict the obtainable part dimensions. The model has been validated by an experimental campaign. The specimens have been investigated by means of profilometer analysis in order to study macrogeometrical and microgeometrical aspects. Finally, a case study highlighted the reliability of the model. The direct implication of this work is the capability, in process planning, to know in advance if the FDM part dimensions will satisfy the specification and the component will fit with others. Moreover, this model can be employed to choose the suitable manufacturing strategy in order to comply with industrial constrains and scopes.

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  1. Dipartimento di Ingegneria Meccanica e Aerospaziale, Università degli Studi di Roma “La Sapienza”, Via Eudossiana 18, 00184, Rome, Italy

    A. Boschetto & L. Bottini

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  1. A. Boschetto
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  2. L. Bottini
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Correspondence to A. Boschetto.

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Boschetto, A., Bottini, L. Accuracy prediction in fused deposition modeling. Int J Adv Manuf Technol 73, 913–928 (2014). https://doi.org/10.1007/s00170-014-5886-4

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  • DOI: https://doi.org/10.1007/s00170-014-5886-4

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