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Development of Magnetic Polishing for Micro Channel With a Ball-Nose-Shaped Tool

[+] Author Affiliations
Yusuke Takebayashi, Toshiki Hirogaki, Eiichi Aoyama

Doshisha University, Kyotanabe, Kyoto, Japan

Keiji Ogawa

The University of Shiga Prefecture, Hikone, Shiga, Japan

Shreyes N. Melkote

Georgia Institute of Technology, Atlanta, GA

Paper No. IMECE2013-64163, pp. V02AT02A047; 6 pages
  • ASME 2013 International Mechanical Engineering Congress and Exposition
  • Volume 2A: Advanced Manufacturing
  • San Diego, California, USA, November 15–21, 2013
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-5618-5
  • Copyright © 2013 by ASME


In recent years, a high quality and accurately manufactured surface is needed for micro channels for micro-TAS (micro-total analysis systems, a kind of MEMS technology) chips in medical fields. We demonstrated that the use of smaller machine tools is an effective method to reduce the environmental impact in the small parts manufacturing field. Then, in this report, we focus on magnetic polishing for micro channels with a ball-nose-shaped tool, integrating the end milling and polishing processes in a desktop-sized machine tool. The magnetic brush was formed by adhering a magnetic polishing paste, which was composed of abrasive grains (alumina, particle size 0.05 um), metallic particles (cast-iron, diameter 1–100 um), and solvating media (vegetal oil), to the tip (radius 2 mm) of the ball-nose-shaped tool, which was a permanent magnet and a prototype micro tool with a ball-nose end mill shape. We attempt to end mill and polish the surface of micro channels with a prototype magnetic tool and a desktop-sized machine tool. The quality of the machined surface is estimated with a high accuracy surface profile meter. As a result, it can be seen that the proposed method is effective to machine and finish the micro channel surface for micro-TAS chips.

Copyright © 2013 by ASME



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