A precision generating hobbing method for face gear with assembly spherical hob

• Published in: Journal of Central South University Vol. 26; no. 10; pp. 2704 - 2716
• Main Authors: Wang, Yan-zhong, Chu, Xiao-meng, Zhao, Wen-jun, Wang, Zhuo, Su, Guo-ying, Huang, Yi-zhan
• Format: Journal Article
• Language: English
• Published: Changsha Central South University 01.10.2019; Springer Nature B.V
• Subjects: Assembly; Engineering; Error analysis; Gear hobbing; Gear teeth; Metallic Materials; Numerical controls; Parameter modification; Process parameters; Substrates; hobbing machine; 球形滚刀基蜗杆; error analysis; 装配式球形滚刀; assembly spherical hob; face gear; spherical hob basic worm; 面齿轮; 误差分析; 滚齿加工
• ISSN: 2095-2899; 2227-5223
• DOI: 10.1007/s11771-019-4207-3

In order to improve the processing precision and shorten the hob manufacturing cycle of the face gear, a precision generating hobbing method for face gear with the assembly spherical hob is proposed. Firstly, the evolution of the cylindrical gear to spherical hob basic worm is analyzed, then the spherical hob basic worm is designed, thus the basic worm and spiral angle equation of spherical hob are obtained. Secondly, based on the design method of the existing hob, the development method of the assembly spherical hob is analyzed, the cutter tooth and the cutter substrate of the assembly hob are designed, and the whole assembly is finished. Thirdly, based on the need of face gear hobbing, a numerical control machine for gear hobbing is developed, and the equation of the face gear is obtained. Fourth, for reducing the face gear processing errors induced by equivalent installation errors, the error analysis model is established and the impacts of each error on the gear tooth surface are analyzed. Finally, the assembly spherical hob is manufactured and the gear hobbing test is completed. According to the measurement results, the processing parameters of face gear hobbing are modified, and the deviation of tooth surface is significantly reduced.