524 鉄系材料の断続切削における単結晶ダイヤモンド工具の摩耗抑制(OS-8 工具・ツーリング)

概要

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Ultra precision machining of steels with geometrically defined single crystal diamond cutting tools is handicapped by excessive tool wear. In general, it is said that the wear of diamond tool is caused by chemically reactive wear, such as diffusion into steel, oxidation, graphitization and carbide-formation of diamond under high temperature and high pressure conditions. This paper presents a new approach to suppress the tool wear of single crystal diamond in cutting of steels. In order to suppress such chemical reactions, the contact time in a cycle between the diamond tool and the steel workpiece was controlled by employing the intermittent cutting method. Series of intermittent cutting experiments were carried out to examine the effect of the chip thickness in a cycle and the shape of the diamond tool (rake angle and clearance angle) upon the wear of diamond tool. The experimental results show that the tool wear is reduced by reducing the chip thickness in a cycle and increasing the clearance angle of the diamond tool.
2006-11-24