On the Lubricity and Comparative Life Cycle of Biobased Synthetic and Mineral Oil Emulsions in Machining Titanium Ti-6Al-4V at Low Cutting Speed

Journal article


Wood, P., Boud, F., Carter, W., Varasteh, H., Gunputh, U., Pawlik, M., Clementson, J., Lu, Y. and Hossain, S. 2022. On the Lubricity and Comparative Life Cycle of Biobased Synthetic and Mineral Oil Emulsions in Machining Titanium Ti-6Al-4V at Low Cutting Speed. Journal of Manufacturing and material processing. 6 (6), pp. 1-16. https://doi.org/10.3390/jmmp6060154
AuthorsWood, P., Boud, F., Carter, W., Varasteh, H., Gunputh, U., Pawlik, M., Clementson, J., Lu, Y. and Hossain, S.
Abstract

The paper discusses an instrumented tapping test method using a CNC machine tool to compare the lubricity of MWFs by cutting threads in a Ti-6Al-4V alloy at low speed. The method uses a spiral flute tap size typical of industrial practice. A soft synchronous tap holder and spindle mounted dynamometer were incorporated on the machine to measure torque and thrust force. The tapping test method was demonstrated on three groups of MWFs that were commercially available and classified by ASTM E2523-13:2018. The method developed stable results free of chip clogging in tool flutes which could otherwise mask their comparative lubricity. The fully synthetic (FS) group displayed the best lubricity and within this group the FS from renewables (FS-bio) was the best overall. The method was shown to be effective in mitigating biasing effects on lubricity performance due to the generous tool chamfer angle tolerance and was practical and economical to implement. The significance of the results is discussed enabling an understanding of friction effects in tapping using a soft synchronous tap holder. A life cycle assessment of each MWF group found total Greenhouse Gas emitted from the FS group was 17% of the hydrocarbon group whilst FS-bio emitted just 7%.

Keywordsinstrumented tapping; lubricity of MWFs; torque and thrust force
Year2022
JournalJournal of Manufacturing and material processing
Journal citation6 (6), pp. 1-16
PublisherMDPI
ISSN 2504-4494
Digital Object Identifier (DOI)https://doi.org/10.3390/jmmp6060154
Web address (URL)https://www.mdpi.com/2504-4494/6/6/154
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Open
Output statusPublished
Publication dates
Online02 Dec 2022
Publication process dates
Accepted30 Nov 2022
Deposited11 Jan 2023
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