本文主要介绍了有特殊位置椭圆形状型芯的数控车床加工方法，解决了模具生产中的难题。

This paper mainly introduced CNC lathe processing method of the special position elliptic shape core. solve the difficult problems of mold production.

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探讨了常见非圆弧曲线的加工方法，并以椭圆及正弦曲线为例，叙述了在使用宏指令加工过程中坐标值的数据转换及程序编制。

The way to process non-arc curves was discussed. Illustrating ellipse and sinusoid curves, the coordinate conversion and programming in the process of using macro command were stated.

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分别对凸轮靠模和曲柄滑块机构作为工装加工椭圆手孔盖的原理及特点进行了探讨。

The paper respectively studies the principles and features for profiling attachment and slider crank mechanism to be used as clamping apparatus to fabricate oval hand hole cover.

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