Improvement of the quality of cryogenic machining by stabilization of liquid nitrogen jet pressure

Myeong Gu Gang, Byung Kwon Min, Tae Gon Kim, Seok Woo Lee

Research output: Contribution to journalArticle

Abstract

Titanium alloy has been widely used in the aerospace industry because of its high strength and good corrosion resistance. During cutting, the low thermal conductivity and high chemical reactivity of titanium generate a high cutting temperature and accelerates tool wear. To improve cutting tool life, cryogenic machining by using a liquid nitrogen (LN2) jet is suggested. In cryogenic jet cooling, evaporation of LN2 in the tank and transfer tube could cause pressure fluctuation and change the cooling rate. In this work, cooling uniformity is investigated in terms of liquid nitrogen jet pressure in cryogenic jet cooling during titanium alloy turning. Fluctuation of jet spraying pressure causes tool temperature to fluctuate. It is possible to suppress the fluctuation of the jet pressure and improve cooling by using a phase separator. Measuring tool temperature shows that consistent LN2 jet pressure improves cryogenic cooling uniformity.

Original languageEnglish
Pages (from-to)247-251
Number of pages5
JournalJournal of the Korean Society for Precision Engineering
Volume34
Issue number4
DOIs
Publication statusPublished - 2017 Apr

All Science Journal Classification (ASJC) codes

  • Safety, Risk, Reliability and Quality
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering

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