Simulation analysis of ultra-fine machining process. Analysis of cutting mechanism of single crystal based on simple shear plane model.
Simulation analysis of ultra-fine machining process. Analysis of cutting mechanism of single crystal based on simple shear plane model.
复制标题
超精加工过程仿真分析。
DOI：
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发表时间：
1991
期刊：
影响因子：
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通讯作者：
H. Kurashima
中科院分区：
文献类型：
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作者：
T. Shirakashi;M. Yoshino;H. Kurashima
超微细加工是获得具有精细尺寸和表面的产品的关键技术。由于表面特性受切削机理和/或切屑形成的影响很大，因此预测这种现象非常重要。在超精细加工中，未变形切屑厚度的尺寸小于工件材料的晶体的尺寸。可以看到，对具有随机取向的单晶进行切割。本文讨论了单晶材料的切削机理，并对切削机理的预测问题进行了讨论。通过在扫描电镜下对精切削的切削力、刀具前刀面摩擦角等进行观察和定量测量，得到以下结果。该流动型芯片是为单晶的任何方向生成的。而晶体方向和前刀面摩擦角对剪切角的影响很大，摩擦角既取决于晶体方向，又取决于前角。当已知任意方向的摩擦角时，剪切角随方向的变化可以根据晶体滑移理论或各向异性塑性理论进行预测。为了预测剪切角，必须讨论前刀面上的摩擦角。
An ultra-fine machining is a key technology for obtaining a product with fine dimensions and surfaces. As a surface characteristic is greatly affected by cutting mechanism and/or chip formation, it is very important to predict the phenomenon. At an ultra-fine machining, a dimension of undeformed chip thickness is less than that of crystal of work material. A cutting may be seen to be carried out for single crystals with random orientations. The paper discusses about the cutting mechanism on single crystal material, and about the problems for predicting the cutting mechanism. Through the observation and quantitative measurements of cutting forces, friction angle on tool rake face etc. of fine cutting in SEM, the following results were obtained. The flow type chip is generated for any direction of single crystal. The shear angles, however, are greatly affected by the direction of crystal and the friction angle on rake face also, which depends on the direction and on the rake angle too. The alternation of shear angle depending on the direction can be predicted based on either slip theory of crystal or anisotropic plastic theory, when the friction angle for any direction is in hand. In order to predict a shear angle, a friction angle on rake face must be discussed.