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 1

Fingerprint

Liquid nitrogen
Cryogenics
Machining
Stabilization
Cooling
Titanium alloys
Chemical reactivity
Aerospace industry
Cutting tools
Spraying
Separators
Temperature
Corrosion resistance
Thermal conductivity
Evaporation
Titanium
Wear of materials

All Science Journal Classification (ASJC) codes

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

Cite this

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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.",
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Improvement of the quality of cryogenic machining by stabilization of liquid nitrogen jet pressure. / Gang, Myeong Gu; Min, Byung-Kwon; Kim, Tae Gon; Lee, Seok Woo.

In: Journal of the Korean Society for Precision Engineering, Vol. 34, No. 4, 01.04.2017, p. 247-251.

Research output: Contribution to journalArticle

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