Minimum quantity lubrication is considered a viable alternative to flood lubrication systems. The effect of the inclusion of sub-zero air in the MQL aerosol – called hybrid MQL or minimum quantity cooling lubrication (MQCL) - in milling Ti-6-Al-4-V is studied by comparing cutting temperatures, surface roughness and chips produced by both the systems. MQCL shows considerable improvement over MQL, with its primary action being the improved lubricity of the cutting fluid at lower temperatures, and easier separation of chips from the rake face, assisted by the cold air. Chips produced in MQCL are also thinner, with reduced radii, lower underside roughness, and less segmentations produced due to adiabatic shear zone. The friction coefficient at the chip-tool interface is also lower.
Tribology International – Elsevier
Published: Mar 1, 2018
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