精密工学会誌
Online ISSN : 1882-675X
Print ISSN : 0912-0289
ISSN-L : 0912-0289
三次元連続型切りくず生成過程のシミュレーション解析(第2報)
工具コーナ半径が高マンガン鋼の切削機構に及ぼす影響
前川 克廣前田 正史北川 武揚
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1994 年 60 巻 2 号 p. 240-244

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The present study investigates the influence of three-dimensional tool geometry upon the cutting mechanism of a 18%Mn-5%Cr steel with a P 20 carbide tool, where the computer simulation method proposed in the previous paper has been employed. The three-dimensional simulation has revealed that the physical background of empirical knowledge such that a larger corner radius is recommended for difficult-to-cut materials for large work-hardening and low thermal conductivity; the increase of the radius causes a large chip-flow angle and small undeformed and deformed chip thicknesses at the corner, leading to the decrease in the deformation and the drop of temperature. As a result, not only wear at the corner but also the influence into the finished surface is lessened. Experiments have validated the simulation results: both predicted and measured cutting forces, chip geometry, tool temperature and tool wear accord well with each other.

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