超精密切削加工に関する研究 : 磁気ディスクサブストレートの加工

概要

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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 R_<max> of surface roughness is obtained when the tool is set at an appropriate angleθ. (2) The appropriate tool setting angleθ, stated in (1) above, varies according to the purity of the material to be cut and the amount of alloy atomic elements. (3) Theθ_<min> 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.
公益社団法人精密工学会の論文
1987-04-05