著者

上原 邦雄 檀原 袈裟男

出版者

公益社団法人 精密工学会

雑誌

精密機械 (ISSN:03743543)

巻号頁・発行日

vol.41, no.490, pp.1043-1049, 1975-11-05 (Released:2009-06-30)

参考文献数

9

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This paper deals the cutting behavior of copper and aluminum in vacuum machining in which the materials were turned by specially made lathe at 40 m/min of cutting speed and under the reduction of pressure up to 10-4 mmHg. It was found that the cutting characteristics such as cutting force, cutting ratio etc. are not influenced by the degree of vacuum in machining tough pitch copper, oxygen free copper and 98% aluminum, however, they are affected in machining high purity aluminum. This is a contrasting result compared with the former paper in which the cutting behavior of carbon steel and titanium was examined. In order to clarify the cause of above phenomena, the experimental data were examined in detail basing on five factors which would affect the state of cutting in vacuum machining. As the result, it is cleared that the constancy of the cutting force in machining tough pitch copper and oxygen free copper is due to the nearly equal shear strength of adsorption layer or oxide film at the tool-chip interface compared with that of metallic contact part of the interface. Further, it is concluded that the cutting behavior of aluminum is affected strongly by the existence or the formation of γ alumina at tool-chip interface.