Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
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Study on Characteristics of Cryogenic Machining Process of Titanium Alloy at a Low Cutting Speed

티타늄 합금 소재 저속 영역 극저온 가공 특성 연구

  • Kim, Do Young (Department of Mechanical Engineering, Ulsan National Institute of Science and Technology) ;
  • Kim, Dong Min (Department of Mechanical Engineering, Ulsan National Institute of Science and Technology) ;
  • Park, Hyung Wook (Department of Mechanical Engineering, Ulsan National Institute of Science and Technology)
  • 김도영 (울산과학기술원 기계공학과) ;
  • 김동민 (울산과학기술원 기계공학과) ;
  • 박형욱 (울산과학기술원 기계공학과)
  • Received : 2017.02.16
  • Accepted : 2017.03.22
  • Published : 2017.04.01
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Abstract

Cryogenic machining uses liquid nitrogen (LN2) as a coolant. This machining process can reduce the cutting temperature and increase tool life. Titanium alloys have been widely used in the aerospace and automobile industries because of their high strength-to-weight ratio. However, they are difficult to machine because of their poor thermal properties, which reduce tool life. In this study, we applied cryogenic machining to titanium alloys. Orthogonal cutting experiments were performed at a low cutting speed (1.2 - 2.1 m/min) in three cooling conditions: dry, cryogenic, and cryogenic plus heat. Cutting force and friction coefficients were observed to evaluate the machining characteristics for each cooling condition. For the cryogenic condition, cutting force and friction coefficients increased, but decreased for the cryogenic plus heat condition.

Keywords

References

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