Tooth profile characteristics analysis of circular-arc-tooth-trace cylindrical gear with different processing technology

MA Deng-qiu, YE Zhen-huan, WU Ting-qiang, ZHANG Xu, FU Juan, YAN Chang-guo, WANG Yu-lan
(School of Engineering, Zunyi Normal University, Zunyi 563006, China)

Abstract: Aiming at the problem that the tooth profile characteristics of the circulararctoothtrace (CATT) cylindrical gear is different due to the different processing technologies, the main processing technologies of the CATT cylindrical gear were analyzed (parallel link machining method and the rotary cutter head milling method). And the tooth surface and tooth profile equations of the CATT cylindrical gears were deduced based on the molding principle of the two processes, and the gear tooth thickness equation and tooth thickness deviation equation of the CATT cylindrical gear were obtained further. The influences of tooth width and tooth line radius on the tooth thickness and tooth thickness deviation were analyzed. The research results show that the tooth profile of CATT cylindrical gear processed by parallel link mechanism is involute in the arbitrary cross section; the middle section of the gear processed by the rotary cutter head milling method is involute, the other sections are hyperbola, and design parameters have a certain effect on the tooth profile characteristics. The research results provide a theoretical basis for lubrication, fault diagnosis and tooth profile modification of the CATT cylindrical gear system.
Key words: parallel link mechanism; rotary cutter head milling; circular-arc-tooth-trace (CATT) cylindrical gear; tooth profile characteristics; design parameters