resistance spiral

The enveloping worm helix is the important factor of solid Modeling and further research of different kinds of enveloping worm.

提出了快速构建环面蜗杆3D实体的环面蜗杆螺旋线参数方程及建模,并用此模型完成了直廓和平面包络环面蜗杆以及渐开面包络环面蜗杆的3D实体构建。