镍基高温合金叶片叶尖磨削砂轮系统加工稳定性研究

Study on Machining Stability of Wheel System for Grinding Ni-base Superalloy Blade Tip

压气机静子叶片作为航空发动机的关键零部件之一,其加工精度及表面质量对航空发动机使用寿命和安全性能有重要影响。针对XX型压气机镍基高温合金静子叶片叶尖磨削,建立砂轮系统动力学模型,对砂轮系统进行模态仿真和静力学仿真,分析叶片叶尖弱刚度磨削加工稳定性问题。根据仿真结果对砂轮杆结构进行优化设计,研究结果表明,优化后的砂轮杆可以增大砂轮系统的固有频率和刚度,有助于提高叶片叶尖磨削砂轮系统的加工稳定性。

As one of the key parts of aero-engines,the machining precision and surface quality of compressor stator blades have important influence on aero-engine service life and safety performance.A dynamic model of the grinding wheel system is established to analyze the grinding stability of the blade tip with weak stiffness.According to the simulation results,the structure of the grinding wheel rod is optimized.The results show that the optimized grinding wheel rod can increase the natural frequency and stiffness of the grinding wheel system,which is helpful to improve the processing stability of the blade tip grinding wheel system.