Curved-layered material extrusion modeling for thin-walled parts by a 5-axis machine
ISSN: 1355-2546
Article publication date: 19 July 2021
Issue publication date: 3 August 2021
Abstract
Purpose
The purpose of this paper is to solve the problems of poor mechanical properties, high surface roughness and waste support materials of thin-walled parts fabricated by flat-layered additive manufacturing process.
Design/methodology/approach
This paper proposes a curved-layered material extrusion modeling process with a five-axis motion mechanism. This process has advantages of the platform rotating, non-support printing and three-dimensional printing path. First, the authors present a curved-layered algorithm by offsetting the bottom surface into a series of conformal surfaces and a toolpath generation algorithm based on the geodesic distance field in each conformal surface. Second, they introduce a parallel five-axis printing machine consisting of a printing head fixed on a delta-type manipulator and a rotary platform on a spherical parallel machine.
Findings
Mechanical experiments show the failure force of the five-axis printed samples is 153% higher than that of the three-axis printed samples. Forming experiments show that the surface roughness significantly decreases from 42.09 to 18.31 µm, and in addition, the material consumption reduces by 42.90%. These data indicate the curved-layered algorithm and five-axis motion mechanism in this paper could effectively improve mechanical properties and the surface roughness of thin-walled parts, and realize non-support printing. These methods also have reference value for other additive manufacturing processes.
Originality/value
Previous researchers mostly focus on printing simple shapes such as arch or “T”-like shape. In contrast, this study sets out to explore the algorithm and benefits of modeling thin-walled parts by a five-axis machine. Several validated models would allow comparability in five-axis printing.
Keywords
Acknowledgements
This work was supported by the National Natural Science Foundation of China (52075421) and Guangdong Basic and Applied Research Foundation (2020B1515130002).
Citation
Feng, X., Cui, B., Liu, Y., Li, L., Shi, X. and Zhang, X. (2021), "Curved-layered material extrusion modeling for thin-walled parts by a 5-axis machine", Rapid Prototyping Journal, Vol. 27 No. 7, pp. 1378-1387. https://doi.org/10.1108/RPJ-11-2020-0272
Publisher
:Emerald Publishing Limited
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