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"Eun-Ji Oh"

Article
Lightweight Design of a Sledge Frame for Para Ice Hockey Using Design for Additive Manufacturing
Eun-Ji Oh, Ju-Hye Lee, Jae-Eun Kim, Keun Park
J. Korean Soc. Precis. Eng. 2020;37(6):407-414.
Published online June 1, 2020
DOI: https://doi.org/10.7736/JKSPE.020.039
The purpose of this study was to design a sledge frame for para ice hockey in which an athlete sits and plays on a sledge. A sledge comprises a bucket, a blade carrier, and a frame. A sledge frame is usually fabricated by welding a number of pipes, and thus its structural safety is degenerated at the welded joints. In this study, the sledge frame was redesigned using the principle of DfAM (Design for Additive Manufacturing), to reduce the frame weight as well as to have sufficient structural safety. As an application of DfAM, the part consolidation was performed for six joints from which the number of welding spots was reduced to 56% (From 16 to 9). Among the resulting four consolidated joints, topology optimization was performed for three joints to reduce their weight while maintaining higher structural stiffness and safety. As a result, the structural stiffness and safety of the joints improved remarkably, and the resulting frame weight was reduced by 20% (From 1.66 to 1.34 kg). This weight reduction with structural enhancement is expected to improve athletes’ performance and safety in para ice hockey games.

Citations

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