Investigation of Ultra Precise Cutting: Machining of Magnetic Disk Substrate

In the present study, the following results were obtained when high purity alloys of Al, Al-Cu, Al-Mg, Al-Mg-Zn and OFHC were cut with a natural single crystal diamond tool and a synthesized diamond tool, set at an angle θ and with varied edge radii. (1) The best value Rmax of surface roughness is o...

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Veröffentlicht in:Journal of the Japan Society for Precision Engineering 1987/04/05, Vol.53(4), pp.571-576
Hauptverfasser: HANZAWA, Kazuya, EDA, Hiroshi, KISHI, Kozo, UENO, Hideo
Format: Artikel
Sprache:eng ; jpn
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Zusammenfassung:In the present study, the following results were obtained when high purity alloys of Al, Al-Cu, Al-Mg, Al-Mg-Zn and OFHC were cut with a natural single crystal diamond tool and a synthesized diamond tool, set at an angle θ and with varied edge radii. (1) The best value Rmax of surface roughness is obtained when the tool is set at an appropriate angle θ. (2) The appropriate tool setting angle θ, stated in (1) above, varies according to the purity of the material to be cut and the amount of alloy atomic elements. (3) The θmin value is determined upon proper balance between the banishing and cutting actions of the cutting tool. (4) When mirror finish is required, an ultra precision cutting tool with the edge redius fixed closer to a straight edge is better suited to generate a good machined surface. (5) While the natural and synthesized diamond tools, when compared, do not show a great difference in geometric accuracies such as surface roughness and flatness, there is a difference in the dominating factors of the cutting mechanism such as the cutting force and the friction coefficient of the tool rake face. (6) The shearing stress of a natural single crystal diamond tool indicates an overall value smaller than that of a synthesized diamond tool.
ISSN:0912-0289
1882-675X
DOI:10.2493/jjspe.53.571