Abstract:
Titanium alloy is one of the most difficult-to-cut materials. High-speed machining of Ti-6Al-4V is discussed from the viewpoint of cutting temperature and tool wear. In turning, the heat generated should be dissipated as quickly as possible because the cutting temperature is considerably high. The tool material which has high thermal conductivity, such as natural diamond tool, is suitable for high speed turning under the wet condition. However, the cutting temperature in high speed milling with a small diameter end mill is found to be considerably low. The milling of Ti-6Al-4V at the cutting speed 283 m/min is achieved even under dry condition because of this low cutting temperature. Supplying oil mist coolant is more effective to prolong the tool life in high speed milling.
Key words:
High-speed machining Titanium alloy Ti-6Al-4V
* Selected from Proceedings of International Symposium of Advanced
Manufacturing Technology (ISAMT'2001); revised manuscript July 20, 2002
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