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On modelling coolant penetration into the microchannels at the tool-workpiece interface

Wei, Wenming; Robles-Linares, Jose A.; Liao, Zhirong; Wang, Zhao; Luna, Gonzalo Garcia; Billingham, John; Axinte, Dragos


Wenming Wei

Jose A. Robles-Linares

Zhao Wang

Gonzalo Garcia Luna

Professor of Theoretical Mechanics

Professor of Manufacturing Engineering


A network of microchannels is formed at the interface between the cutting tool and the workpiece during machining due to their rough surface structures. The penetration of coolant into these microchannels has a great effect on the machined surface quality by changing the frictional behaviour and heat transfer characteristics of the interfaces. Most of the present studies focus on the macroscopic coolant delivery process but the mechanism of the microscopic penetration phenomena in the channels at the interface remains unclear. Thus, this study proposes a multi-scale and multi-phase comprehensive theoretical model by combining the machining process, coolant flowing in microchannels and lubrication process, to analyse the coolant transportation in the microchannels and investigate its lubrication effects and the friction mechanisms at the interface between the tool and the workpiece. Then, an orthogonal turning testing of Inconel 718 is designed to verify the proposed model. The cooling and lubrication effect of coolant in the microchannels on the reduction of tool wear, contact length, cutting force and temperature has been demonstrated. And the improvement of chip fragment and microstructure has also been revealed.


Wei, W., Robles-Linares, J. A., Liao, Z., Wang, Z., Luna, G. G., Billingham, J., & Axinte, D. (2022). On modelling coolant penetration into the microchannels at the tool-workpiece interface. Journal of Manufacturing Processes, 84, 43-54.

Journal Article Type Article
Acceptance Date Sep 27, 2022
Online Publication Date Oct 5, 2022
Publication Date 2022-12
Deposit Date Jan 19, 2023
Publicly Available Date Jan 19, 2023
Journal Journal of Manufacturing Processes
Print ISSN 1526-6125
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 84
Pages 43-54
Keywords Industrial and Manufacturing Engineering; Management Science and Operations Research; Strategy and Management
Public URL
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