基于UG仿真的齿轮滚刀变模数变压力角设计

Design of Gear Hob with Variable Modulus and Variable Pressure Angle Based on UG Simulation

为研究齿轮滚刀变模数变压力后对齿轮齿廓的影响,结合UG建模和宏功能进行三维仿真切削模拟,论证了当滚刀触角为极限值时仍无法满足齿轮渐开线起始圆值,应改变滚刀的模数及压力角来改善滚刀齿形,以获得更佳的齿轮齿廓。本文提出了正确的改变模数和压力角的方法,探讨了当被加工齿轮为螺旋齿轮时,修正滚刀与齿轮间的轴交角的方式。

In order to study the influence of variable modulus and variable pressure of gear hob on gear tooth profile,UG modeling and macro function are combined to carry out three-dimensional simulation cutting simulation,and demonstrates that when the hob contact angle is the limit value,but still can not meet the initial circle value of gear involute,the tool designer should change the module and pressure angle of hob to improve the hob tooth profile to obtain better gear tooth profile.This paper also puts forward how to change the modulus and pressure angle correctly,and discusses how to correct the shaft angle between the hob and the gear when the gear to be processed is a helical gear.