Moreover, taking the motion law into account and with the Boolean subtraction calculation of the solids of worm and wormgear at every meshing position, the solid modeling of hourglass worm parts is realized. 考虑运动规律,对每个啮合位置的蜗杆实体与蜗轮轮齿实体进行布尔减运算,进而实现环面蜗杆零件的实体建模。