BOOK_CONTENT
From Mass Finishing Handbook

OVERVIEW

Magnetic-abrasive finishing (designated by several acronyms including MAF and MAP for "magnetic-abrasive polishing") was originally introduced in Russia in 1938. It is defined as a process by which material is removed (deburring and surface finishing) in the presence of a magnetic field in the machining zone (Yamaguchi & Shinmura 1996). There are several variations of this process:

  • magnetic barrel tumbling

  • magnetic-abrasive vibratory finishing

  • magnetic-abrasive spindle finishing

  • magnetic-abrasive cylindrical finishing

  • magnetic-abrasive tube-ID finishing

  • magnetic-abrasive ball finishing

  • magnetic-abrasive special shape finishing

  • magnetic-abrasive prismatic finishing

  • mixed metal fixed magnetic finishing.

Table 20-1 describes some of the media used in the magnetic processes. Note that a variety of media have been used but some are limited to a single variation of the processes described in this chapter.

Table 20-1: Media used in magnetic-abrasive finishing

Process

Media

Properties

Source

Magnetic-abrasive barrel finishing

304 stainless steel

Slightly magnetic

U.S. source: Pritic

Steel balls

Imahashi 2000

Ceramic coated ferrous chunk

Magnetic-abrasive cylindrical finishing

Diamond grains electrodeposited to cast iron balls

Shinmura, Takazawa, Hatano & Matsunaga 1990

Magnetic-abrasive tube finishing

Mixed media: WA magnetic abrasive (80 ?m mean diam., 20 wt%) and electrolytic iron particles (510 ?m mean diam., 80 wt%)

Yamaguchi & Shinmura 1998

Magnetic-abrasive prismatic finishing

Nb-C-Fe nuggets

Produced by plasma powder melting (65% Nb-C)

Anzai 2002

Iron powder plus Pikal metal polish lapping slurry

Anzai 2002

Granular (WA/diamond) or short fiber mixed

Kumakura et al. 1997

Iron powder + diamond...

Copyright Industrial Press Inc. 2007 under license agreement with Books24x7

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