Abstract: In order to realize high speed machining, the special
requirements for the transmission and structure of CNC machine
tool have to be satisfied. A high speed spindle unit driven by a
built-in motor is developed. An oil-water heat exchange system is
used for cooling the spindle motor. The spindle is supported by
Si4N3 ceramic ball angular contact bearings. An oil-air
lubricator is used to lubricate and cool the spindle
bearings. Some special structures are taken for balancing the
spindle.
Key words: High
speed machine Machine tool Spindle Ceramic ball bearing
*
This project
is supported by National Natural Science Foundation of China, the
Provincial Natural Science Foundation of Guangdong and Provincial
Doctoral Foundation of Guangdong. Manuscript received on
September 2, 1999; revised manuscript March 13, 2000
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