Optimal Design Parameter of Percussive Drilling System for Efficiency Improvement
- Authors
- 정진태
- Issue Date
- Jun-2016
- Publisher
- 한국정밀공학회
- Citation
- International Symposium on Green Manufacturing and Applications 2016, pp.170 - 170
- Indexed
- KCI
- Journal Title
- International Symposium on Green Manufacturing and Applications 2016
- Start Page
- 170
- End Page
- 170
- URI
- https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/13543
- ISSN
- 1225-9071
- Abstract
- The aim of this paper is to find the optimal design parameters of the percussive drilling systems considering the bit-rock interaction. First, the motion dynamics of the bit impacted by the dropped piston is modeled by the impact stress propagation and the rock breaking mechanism representing penetration resistance coefficient and unloading constant. Next, the damping vibration behaviors of the bit are investigated considering the impact time duration and the rock loading/unloading condition. Also, the proposed dynamics is simplified by adopting two dimensionless parameters; the bit-piston mass ratio and the rock-piston stiffness ratio. Finally, the drilling efficiency defined by the energy transmitted from the piston to the rock is presented in terms of the proposed parameters. As a result, the optimal design parameters of the percussive drilling systems is found for improving the drilling efficiency. This result is effectively applicable to the design of DTH hammer and Top hammer and their performance estimation.
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Collections - COLLEGE OF ENGINEERING SCIENCES > DEPARTMENT OF MECHANICAL ENGINEERING > 1. Journal Articles
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