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http://dx.doi.org/10.9725/kts.2022.38.1.27

Design of a Novel 3D Printed Harmonic Drive and Analysis of its Application  

Kim, Sang-Hyun (Graduate School, Dept. of Construction Machinery Engineering, Inha University)
Byeon, Chang-Sup (Dept. of Mechanical Engineering, Inha University)
Lee, Chul-Hee (Dept. of Mechanical Engineering, Inha University)
Publication Information
Tribology and Lubricants / v.38, no.1, 2022 , pp. 27-31 More about this Journal
Abstract
Harmonic drives have attracted increasing attention with the development of materials, parts, and related equipment. Harmonic drives exhibit high deceleration, high accuracy, and light weight. The stiffness of flexible splines according to the radial load is studied using a commercial FEM program to design the structure of the flexible spline and finite element to improve the weight and price competitiveness of harmonic drives. In addition, several studies have measured and compared friction coefficients based on 3D printed tread patterns. However, owing to the characteristics of plastic materials, a decrease in stiffness in the radial direction is inevitable. To prevent a decrease in stiffness in the radial direction, we designed and manufactured flex splines with a wrinkle shape. Through structural analysis, the reaction force and stiffness in the radial direction were determined. In addition, the maximum angle of the mound was derived by theoretical calculations, and the performance of the harmonic drive was compared with the results obtained in the mound experiment. Structural analysis shows that the shape of wrinkles decreased the stress and reaction force and increased the safety factor in comparison with that of the circular shape. During performance verification through continuous experiments, the developed harmonic drive showed continuous performance similar to that of an actual tank model. It is expected that the flex spline with a compliant spring and wrinkle shape will prevent a decrease in the radial stiffness.
Keywords
Harmonic drive; Flex spline; Compliant spring; Wrinkle shape; Static analysis;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
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