高弯曲承载能力齿轮过渡曲线及齿形参数研究

Study OnTransition Curve and Tooth Shape Parameters of Gear with High Bending Bearing Capacity

研究齿形参数及齿根过渡曲线加工方式对提高齿轮弯曲承载能力具有十分重要的意义。文章以提高齿轮弯曲承载能力为目的,从齿轮刀具加工参数设计入手,分别考虑四种过渡曲线,建立齿根过渡曲线模型,通过折截面法探究四种过渡曲线下高弯曲承载能力齿轮的压力角及齿高系数的最优解,进而分析压力角、齿高系数对齿根弯曲承载能力的影响,并通过有限元分析对理论结果进行验证。研究表明:标准齿轮下,齿轮型过渡曲线加工的齿轮弯曲承载能力要优于齿条型过渡曲线加工的齿轮,齿高系数、压力角等齿形系数发生变化时,选取适当的过渡曲线,有利于提高齿根的弯曲承载能力。

The investigations on the tooth shape parameters and the processing methods of the gear root interim curve are significant for improving bending bearing capacity of gear root.Starting with the design of theprocessing parameters of gear cutter,the modes of four gear root interim curve was built in this work,and the optimal solution of pressure angle and tooth height coefficient of gear with high bending bearing capacity under four transition curves was investigated by folding section method.After that,effect of pressure angle and tooth height coefficient on the bending bearing ability of gear root was studied.The theoretical results were verified by finite element analysis.Based on this work,the bending bearing ability of gear root machined by gear interim curve is superior to that processed by rackinterim curve.Meanwhile,the appropria-teinterim curve is propitious to the increment of the bending bearing capacity of gear root when changing the pressure angle and addendum coefficient.