Oil delivery balancing and priming for multi-diameter minimum quantity lubrication tooling assemblies

Hughey, Ethan; Stephenson, David A.

doi:10.1016/j.promfg.2019.06.172

Cited by 3 publications

(1 citation statement)

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“…Also, high velocity regions showed low mist concentration and vice versa. Flow of aerosol mixture in multiple through-tool channels was studied by Hughey and Stephenson [19]. By modelling a channel as electrical resistance -the ratio of channel length and channel area--the flow and response time for complete development of MQL flow can be accurately estimated.…”

Section: Literature Reviewmentioning

confidence: 99%

Characterization and Performance of Minimum Quantity Lubricants in Through-Tool Drilling

Patil

Raval

Bangma³

et al. 2020

IJEMM

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This study characterized airborne microdroplet diameters and size distribution from two commercially available lubricants A and B for internal minimum quantity lubrication (MQL). The effects of air pressure, oil channel size, physical properties of lubricants on the resultant microdroplets and through-tool MQL drilling performance were studied. Airborne microdroplet diameters were highly sensitive to the coolant channel sizes and air pressure. Cluster method was used to divide microdroplets into smaller clusters for comparison. Experimental data show that the average airborne microdroplet of lubricant B was larger than that of lubricant A at different air pressures and channel sizes. The contact angle of lubricant A was at least 10° less than that of lubricant B when depositing on glass or aluminium. High-speed imaging showed the tendency of more viscous lubricant B sticking to the drill tip, and higher pressure and longer time was required to atomize this viscous oil. Built-up-edges were less significant when drilling A380 aluminium with lubricant A. Due to high machinability of A380 aluminium, variation of hole diameter and hole cylindricity were minimal when drilling with different lubricants. Insignificant improvement in hole quality was observed when drilling with excessive amount of MQL lubricants or high concentration of lubricant C in flood coolant.

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Section: Literature Reviewmentioning

confidence: 99%