The surface of worm gear is formed by the different positions of wormwheelhob generated as machining. So prisms are inevitably produced.
滚削蜗轮时，其齿侧面为滚刀切削刃在一系列不同位置的包络面，因而不可避免地要产生棱面。
2
This system can accomplish the design of three-dimensional wormwheelhob, construction design and the engineering drawing's automatic achieving.
该系统可完成蜗轮滚刀的三维实体设计、结构设计与工程图的自动生成等工作。
3
The forming principle of Niemann wormwheelhob is described, the curved face equation of Niemann worm is deduced, and the normal profile of the wormwheelhob is calculated.