Machining Ti–6Al–4V alloy with cryogenic compressed air cooling
By S. Sun, Milan Brandt, Mathew S. Dargusch. 2010
185 citations recorded by the source corpus.
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.
Subfields: Civil and Structural Engineering, Electrical and Electronic Engineering, Mechanical Engineering
View Paper: https://www.semanticscholar.org/paper/a4ed06b1204adc49c88ee1f8df9aec03b0730fe1
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Citations in the corpus
- Sustainable machining of titanium alloys: A critical review (2017, methodology): “Sun et al.73 employed a 2.5-kW Nd:YAG laser delivered by a 15-m-long optical fibre and defocused by an optical lens with a focal length of 200mm, to mill Ti6Al-4V.”
- Machining of Titanium Alloy (Ti-6Al-4V)—Theory to Application (2015, methodology): “Thus, the continuous chip produced at high cutting speed with thermal assistance seems to have comparable chip formation mechanism as that of a continuous chip formed at low cutting speed without thermal assistance (Sun et al., 2010b).”