论文研究了机匣数控加工工艺优化的基本实现途径，以及所采用编程方法、切削方式与刀具的选择、切削冷却液的选择等。

The thesis researched the basic ways of the optimizations, the programming methods, the cutting ways and the cutter selections in the process of the NC machining.

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针对上述问题，介绍了静电冷却(干式切削的一种)车削钛合金bt20的方法。

For those problems, here is introduced turning titanium alloy (BT20) with the static cooling which is one way of dry cutting.

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水基切削液具有优良的冷却、清洗和防锈性能，但润滑性能差，因而应用范围受到限制。

The refrigeration, cleaning and antirust performances of water base cutting fluid were very outstanding, but lubricating property was poor. So, it was limited in range of application.

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