Journal of the Korean Society of Industry Convergence (한국산업융합학회 논문집)

The Korean Society of Industry Convergence (한국산업융합학회)
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Structural Analysis of Hammering System for Pine Cone Harvest using Industrial Drone

산업용 드론을 이용한 잣수확용 해머링 시스템의 구조해석

  • Ki-Hong Kim (Dept. of Bio Industrial Machinery Engineering, Pusan National University) ;
  • Dae-Won Bae (VIVA R&D Co., Ltd.) ;
  • Won-Sik Choi (Dept. of Bio Industrial Machinery Engineering, Pusan National University )
  • 김기홍 (부산대학교 바이오산업기계공학과) ;
  • 배대원 (비바알앤디) ;
  • 최원식 (부산대학교 바이오산업기계공학과)
  • Received : 2023.01.26
  • Accepted : 2023.03.06
  • Published : 2023.04.30
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Abstract

In this paper, in order to secure the safety and productivity of pine cone harvest, modeling and structural analysis of the hammering system for pine cone harvest drone that can easily access pine cone of Pinus koraiensis and collide with them to harvest them was performed. It calculate the equivalent stress for the structure of the hammering system and the yield strength of the applied material by applying the shear force of the stalk at which the pine cone is separated from the branch, and it is to verify the safety of the structure and propose an optimal design through appropriate factor of safety and design change. The shear force of the stalk at which the pine cone was separated from the branch was 468 N, and was applied to both ends of the hammering system. The yield strength of SS400 steel used in the hammering system is 245 ㎫, and the design change and structural analysis were performed so that the Von Mises stress could be less than 122.5 ㎫ by applying the factor of safety of 2.0 or more. As a result of the structural analysis of the frist modeling, the Von Mises stress was 220.3 ㎫, the factor of safety was 1.12, and the stress was concentrated in the screw fastening holes. As a result of the design change of the screw fastening holes, the Von Mises stress was 169.4 ㎫, the factor of safety was 1.45, and the stress was concentrated on the side part. As a result of the design change by changing screw fastening holes and adding ribs, the Von Mises stress was 121.6 ㎫, and the factor of safety was 2.02. The safety of the hammering system was secured with an optimal design with little change in mass. There was no deformation or damage as a result of experimenting on pine cone harvest by manufacturing the hammering system with an optimal design.

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References

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