Research on Eccentric Error Compensation of Aviation Gear Grinding Installation

Abstract

There is eccentric error between the geometric center of the gear blank and the axis of the rotary table during the gear grinding process. The machining precision of grinding tooth accuracy is reduced. According to the working principle of computer numerical control(CNC)grinding wheel grinding machine, the eccentric error geometric model is built. The compensation method of installation eccentricity error is put forward. The mathematical model of offset error compensation is established. The feed compensation increment of the grinding wheel in the two directions of X and Y is obtained through the mathematical model. Taking the YK73125 CNC grinding wheel grinding machine as an example, the eccentric error compensation experiment is carried out. The single pitch limit deviation is reduced by 0.9 and 1.6 on left and right tooth surfaces. The total cumulative pitch error is reduced by 49.6 and 43.3 on left and right tooth surfaces. The results show that the eccentric error of the installation is proportional to the deviation from the single pitch and the total cumulative deviation of the tooth distance. The experimental results show that the installation eccentricity error compensation for gear grinding can effectively reduce the total deviation of the single pitch deviation and the cumulative tooth distance. The precision of gear grinding is improved.

Keywords

• high precision gear
• grinding machining
• single tooth pitch deviation
• tooth pitch cumulative total deviation
• installation eccentric error compensation