1. Chen,Y.,Wang, F.,Gao, Q. and Yu, X.,Theoretical and experimental study on enveloping hourglass worm tooth surfaces with turning instead of grinding,Journal of machine design,Vol.37,No.7(2020),pp.104-109.
2. Dong, L., Wang, J., et al., An NC rough turning method of an enveloping toroidal worm, Production Engineering, Vol. 6, No. 2(2012), pp.129-135.
3. Ding,S.,Wu,W. and Yu, L.,High-efficiency precision CNC turning method for gradually opening enveloping toroidal worm,China patent disclosure 2019107407990 (2019).
4. Dong, X., Design and Modification of Enveloping Worm Gearing (2004), China Mechanical Industry Press (in Chinese)
5. Dong, X., Duan, X., Wang, J. and Gu, J.,Method for machining spiral surface of toroidal worm on numerical control lathe, China patent disclosure 201610785484(2016).