航空齿轮磨削加工安装偏心误差补偿研究

磨齿加工时齿坯几何中心与回转工作台轴心存在安装偏心误差,降低了磨齿加工精度。以数控成型砂轮磨齿机工作原理为基础,建立偏心误差磨削加工几何模型;提出安装偏心误差补偿法,建立偏心误差补偿数学模型,通过数学模型求出磨削砂轮在X、Y两个方向的进给补偿增量;以YK73125数控成型砂轮磨齿机为例,进行安装偏心误差补偿实验,齿轮的左右齿面单个齿距极限偏差绝对值分别减小了0.9μm和1.6μm,齿距累积总偏差绝对值分别减小了49.6μm和43.3μm。结果表明:安装偏心误差与单个齿距偏差和齿距累积总偏差成正比;采用安装偏心误差补偿进行磨齿加工,有效地减小了单个齿距偏差和齿距累积总偏差,齿轮的精度有所提高。

Research on eccentric error compensation of aviation gear grinding installation

There is eccentric error between the geometric center of the gear blank and the axis of the rotary table during the aero gear grinding process. The machining precision of grinding tooth accuracy is reduced. In order to improve the precision of gear grinding, according to the working principle of CNC grinding wheel grinding machine, the eccentric error of the installation is proportional to the deviation from the single pitch and the total cumulative deviation of the tooth distance by analysis. 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 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.