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- W4387463141 abstract "Internal surface finishing of complex channels fabricated by additive manufacturing (AM) is of large consequence to the future functionality of AM components. Conventional fluid-based internal polishing methods struggle to maintain surface finish uniformity and dimensional integrity especially in long, complex channels with correspondingly high aspect ratios. In this study, we introduce a novel hydrodynamic flexible spindle (HydroFlex) polishing process, in which a fixed diamond abrasive wheel is driven by a high-speed flexible spindle and the hydrodynamic force from the flow pattern surrounding the wheel. The performance of HydroFlex polishing in long, complex channels was experimentally investigated. HydroFlex polishing was evaluated in both straight and curved channels with wheel speeds of 50,000, 70,000, and 90,000 rpm and wheel sizes of 1.75, 2.00, and 2.25 mm. Surface finish, grinding forces, dimensional integrity, and surface uniformity were quantitatively compared. This technique improved surface roughness by 88.2% with sub-micron roughness obtained. Channels with varied curvature and length were consistently polished with deviation in roughness and material removal being 7% and 11% indicating uniformity in material removal, and surface roughness improvement regardless of part geometry. Rotational speed and grinding wheel size were found to directly correlate with grinding force and cutting motion. The findings show the potential of HydroFlex polishing being used for uniform, surface roughness improvement in complex, high aspect ratio channels such as those produced by AM processes." @default.
- W4387463141 created "2023-10-10" @default.
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- W4387463141 date "2023-08-01" @default.
- W4387463141 modified "2023-10-11" @default.
- W4387463141 title "Hydrodynamic flexible spindle (HydroFlex) polishing for internal surfaces of complex channels with high aspect ratio" @default.
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- W4387463141 doi "https://doi.org/10.1016/j.mfglet.2023.08.091" @default.
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