| dc.description.abstract | We report the implementation of a novel magnetic concertation setup for localized
finishing of freeform surfaces based on employing electro-permanent magnet arrays
configured using a recently developed magnetic concentration principle. The setup,
without the use of any rotating or moving component, is capable of creating a localized
spatiotemporal magnetic field variation in the specialized magnetic fluid to polish a target
1.5cm^2 area on the workpiece surface. Using a computational mechanistic model as well
as experimental studies, we show that the current configuration of electro-permanent
magnets is capable of amplifying the magnetic strength by almost 3 times near the
workpiece surface in comparison to no magnetic concentration. We also show that by
modulating the strength, including toggling the polarity of electro-permanent magnets, we
demonstrate the sloshing motion of the fluid at a targeted region without requiring any
rotating part.
A set of experiments was conducted to study the capabilities of the experimental
setup. The first experimental investigation looked at the localized and selective removal
of acrylic paint applied from a differential geometry. The second experimental study
looked at improving the surface roughness of 3D printed polyurethane dogbone samples.
The process was capable of reducing the SA values from 11 µm initially to .7 µm.
1 Parts of the abstract are reprinted with permission from “Localized magnetic fluid finishing of freeform surfaces using electropermanent magnets and magnetic concentration” by Iskander El-Amri, Ashif Sikandar
Iquebal, Arun Srinivasa, Satish Bukkapatnam, 2019. Journal of Manufacturing Processes,2018
https://doi.org/10.1016/j.jmapro.2018.05.026 , Copyright 2018 by Elsevier | en |
