Journal of the Korean Society of Manufacturing Process Engineers (한국기계가공학회지)

The Korean Society of Manufacturing Process Engineers (한국기계가공학회)
권호 표지

Analyses of Shear and Frictional Characteristics in Drilling Process

드릴링 공정의 전단 및 마찰 특성 해석

  • Kim, Sun-Il (Graduate school of Mechanical Engineering, Kyungpook National University) ;
  • Choi, Won-Sik (Department of Bio-Industrial Machinery Engineering, Pusan National University) ;
  • Son, Jae-Hwan (Daegu Machinery Institute of Component & Materials Foundation) ;
  • Jang, Eun-Suk (Graduate school of Mechanical Engineering, Kyungpook National University) ;
  • Lee, Young-Moon (School of Mechanical Engineering, Kyungpook National University)
  • Published : 2012.12.31
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Abstract

Drilling process is usually the most efficient and economical method of making a hole in a solid body. However, there have been no analytical method to assess drilling process based on the shear and frictional characteristics. In this paper, procedures for analyzing shear and frictional processes of drilling have been established by adopting an equivalent turning system to drilling. A series of drilling experiments were carried out with varying feed, velocity and drill shape factors. Using the results of the experiments, the cutting characteristics including shear in the primary shear zone and friction in the chip-tool contact region of drilling process have been analyzed. The specific cutting energy tends to decrease exponentially with increase of feed rate. In drilling process 35-40% of the total energy is consumed in the friction process. This is greater than that of turning process in cutting of the same work material.

Keywords

References

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