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Support-free hollowing with spheroids and efficient 3D printing utilizing circular printing motions based on Voronoi diagrams

Title
Support-free hollowing with spheroids and efficient 3D printing utilizing circular printing motions based on Voronoi diagrams
Author
김덕수
Keywords
3D printing; Overhang; Packing; Tool path; Circular motion
Issue Date
2020-10
Publisher
MARY ANN LIEBERT
Citation
ADDITIVE MANUFACTURING, v. 35, article no. 101254
Abstract
Extrusion-based printing frequently requires a hollowing step to remove material from inside of artifacts and subsequently reduce the amount of material, printing time, product weight, energy consumption, and ultimately, the cost. Here, we introduce a novel support-free hollowing method that uses an arrangement of vertically-aligned prolate spheroids. In addition to reducing stress concentration through their inherently smooth boundaries, these spheroids require no additional support structure, when properly designed. Additionally, the resulting spheroidal hollows facilitate the circular printing motion of extruders using G2/G3-codes, which provide three critical advantages compared to the currently popular G1-code-based linear motion: shorter printing time, better printing quality, and smaller tool path file. Here, spheroids are arranged by the Voronoi diagram of 3D ellipsoids and the tool path, including circular printing motions, is produced using the Voronoi diagram of circular 2D disks. The proposed algorithms are implemented as the HollowTron webserver and are freely available from Voronoi Diagram Research Center.
URI
https://www.sciencedirect.com/science/article/pii/S2214860420306266?via%3Dihubhttps://repository.hanyang.ac.kr/handle/20.500.11754/171120
ISSN
2214-8604; 2214-7810
DOI
10.1016/j.addma.2020.101254
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MECHANICAL ENGINEERING(기계공학부) > Articles
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