Machining Ti–6Al–4V alloy with cryogenic compressed air cooling

Sun, S., Brandt, M. and Dargusch, M. S. (2010) Machining Ti–6Al–4V alloy with cryogenic compressed air cooling. International Journal of Machine Tools and Manufacture, 50 11: 933-942. doi:10.1016/j.ijmachtools.2010.08.003


Author Sun, S.
Brandt, M.
Dargusch, M. S.
Title Machining Ti–6Al–4V alloy with cryogenic compressed air cooling
Journal name International Journal of Machine Tools and Manufacture   Check publisher's open access policy
ISSN 0890-6955
Publication date 2010-11-01
Sub-type Article (original research)
DOI 10.1016/j.ijmachtools.2010.08.003
Volume 50
Issue 11
Start page 933
End page 942
Total pages 10
Place of publication New York, N.Y, United States
Publisher Elsevier
Collection year 2011
Language eng
Abstract A new cooling approach with cryogenic compressed air has been developed in order to cool the cutting tool edge during turning of Ti–6Al–4V alloy. The cutting forces, chip morphology and chip temperature were measured and compared with those measured during machining with compressed air cooling and dry cutting conditions. The chip temperature is lower with cryogenic compressed air cooling than those with compressed air cooling and dry machining. The combined effects of reduced friction and chip bending away from the cutting zone as a result of the high-speed air produce a thinner chip with cryogenic compressed air cooling and a thicker chip with compressed air cooling compared to dry machining alone. The marginally higher cutting force associated with the application of cryogenic compressed air compared with dry machining is the result of lower chip temperatures and a higher shear plane angle. The tendency to form a segmented chip is higher when machining with cryogenic compressed air than that with compressed air and dry machining only within the ranges of cutting speed and feed when chip transitions from continuous to the segmented. The effect of cryogenic compressed air on the cutting force and chip formation diminishes with increase in cutting speed and feed rate. The application of both compressed air and cryogenic compressed air reduced flank wear and the tendency to form the chip built-up edge. This resulted in a smaller increase in cutting forces (more significantly in the feed force) after cutting long distance compared with that observed in dry machining.
Keyword Cryogenic
Compressed air
Cutting force
Chip temperature
Chip roughness ratio
Tool wear
High-pressure coolant
To cut materials
Cutting forces
Chip control
Water-vapor
Wear
Machinability
Cooling/lubrication
Temperatures
Lubrication
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Available online 18 August 2010.

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mechanical & Mining Engineering Publications
Official 2011 Collection
 
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Created: Sun, 28 Nov 2010, 10:04:45 EST