TABLE OF CONTENTS 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.
| 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... |
