3次元分子動力学法を用いた微細加工機構の解析 : 第2報, 被削材結晶方位が被削性に及ぼす影響

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This paper describes the effect of crystal orientation on the machinability of the atomic-scale cutting process by molecular dynamics simulation. The interatomic force between tool and workpiece is assumed to be derived from the Morse potential function using parameters based on the abinitio molecular orbital calculation for a NiC_6H_9 cluster. Molecular dynamics simulations of the cutting process were carried out by changing the surface gradient angle θ and the cutting direction angle θ. The angle θ significantly influenced the chip and side flow formations, while the angle φ did not. The atomic-scale cutting on the surface in the negative θ region brought about a smoother surface than that in the positive θ region. The angle θ influenced the number of workpiece atoms moved while the angle φ had an influence on the moving direction of the workpiece atoms. We found that the best machinability in the atomic- scale cutting process occurred when the angle θ was more than 0°, with the cutting direction being near the slip direction of the workpiece.
一般社団法人日本機械学会の論文
1997-08-25