In order to manufacture planardouble-enveloping toroid worm gear with CNC methods, a precise digital model must be constructed.
为了实现平面二次包络环面蜗轮的数控加工，必须对蜗轮进行精确数字化造型。
2
Although the planardouble-envelopingworm gearing has advantages of high transmission efficiency, excellent load capacity, long life cycle and so on, it has been used in a limited way.
虽然平面二次包络环面蜗轮副具有传动效率高、承载能力大、使用寿命长等优点，但它的应用却始终受到限制。
3
The global and local collision detection and processing in the machining planardouble-enveloping toroid worm gear drive using 5-axis NC machine tool was discussed in the dissertation.