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. A new type of toroidal surface enveloping conical worm gearing is proposedin our recent work (Chongfei and Yaping, 2019b). According to its forming principle, thegeometrical shape of the generating surface has an important influence onthe geometry characteristic of the enveloping worm pair. To explore thereasonable principles for selecting the geometrical parameters of thegrinding wheel, some numerical study examples are performed. In thisprocess, the methods for the tooth crest width are developed. Simplestrategies for estimating the risk of the worm tooth surface being locatedin the invalid area and the risk of the curvature interference on the toothsurface are proposed. The numerical result shows that increasing theradius of the toroidal-generating surface and the nominal pressure angle ofthe grinding wheel are beneficial to improve the engagement behavior of theconical worm pair, but the tooth crest sharpening of the conical worm mayhappen if they are too large. For the nominal radius of the grinding wheel,it has a negligible effect on the meshing characteristics of this worm set.In addition, the selection principle of the parameters is also suggested.

Influence of grinding wheel parameters on the meshing performance of toroidal surface enveloping conical worm drive