Open AccessStudy on Characteristics of Cryogenic Machining Process of Titanium Alloy at a Low Cutting Speed
Author(s) -
Do Young Kim,
Dong Min Kim,
Hyung Wook Park
Publication year - 2017
Publication title -
journal of the korean society for precision engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.201
H-Index - 4
eISSN - 2287-8769
pISSN - 1225-9071
DOI - 10.7736/kspe.2017.34.4.237
Subject(s) - machining , materials science , titanium alloy , coolant , liquid nitrogen , aerospace , metallurgy , cryogenic treatment , cryogenics , tool wear , alloy , titanium , thermal , cutting tool , cryogenic temperature , mechanical engineering , composite material , engineering , microstructure , physics , quantum mechanics , meteorology , aerospace engineering
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
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