| 摘要 |
PURPOSE:To form a thin layer of dense aluminum oxide over the cut surface by performing the cooling with spray of inert gas and oxygen gas while machining the work composed mainly of aluminum inside a vessel. CONSTITUTION:Inside of a vessel 1 is decompressed by a vacuum pump 6. The rotary shaft 2 of a lathe or milling machine is rotated, and its cutter 4 shall machine a work W. At this time, a mixture gas of argon and oxygen is sprayed from a nozzle 8 to the part to be machined to cool there. Then arc discharge is performed from a discharge electrode 11 so as to form a thin layer of dense aluminum oxide, such as sapphire, over the cut surface of the work W. |
