特殊環境下における切削加工の研究 : 第1報, 真空内切削装置の試作と純アルミニウムの加工実験

概要

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In this study, which is aimed at understanding machining characteristics and tribological phenomena in vacuum, a machining system in a vacuum chamber which pressure is 6.0×10^<-5> Pa, is developed and diamond cutting experiments using aluminum workpieces are carried out. The cutting system is a face turning composed of a high speed spindle with a magnetic bearing, that revolves at 22000rpm in vacuum, and a diamond tool with rake angle 0 deg and flank angle 5 deg. Cutting behaviors in vacuum are similar to those in argon gases, and also those in air and oxygen are in a similar way. For instance, the cutting force in vacuum and in argon gases is larger than that in air and oxygen, and phenomena like a built-up edge generate in air and oxygen, but that is not observed in vacuum and argon gases. The similarity depends on the pressure or absence of oxygen. It is found that those results depend on the pressure or absence of oxygen.
1996-11-25