Abstract: To improve the Surface Quality (SQ) of blade Leading and Trailing Edges (LTE),the polishing process of LTE with Abrasive Belt Flap Wheel (ABFW) was researched.According to the analysis of present problems existed in LTE polishing process,the ABFW flexible polishing process method was proposed based on ABFW machining characteristics.The primary process parameters affected SQ such as ABFW size,normal force,spindle speed and feed rate were determined on the basis of Material Removal Rate (MRR) with Preston equation.The polishing experiments were designed with response surface method,and the coupling effect between parameters on Surface Roughness (SR) were analyzed to establish the second order prediction model.The optimal parametric field and the optimum polishing parameters were obtained accordingly.The final LTE polishing experimental results showed that SQ was improved significantly with SR of less than 0.4μm,which met the quality requirement well.

Key words: blade, leading and trailing edges, flap wheel, flexible polishing, parameters optimization

摘要： 为改善叶片前后缘的表面质量、提高航空发动机的性能和寿命,对叶片前后缘百页轮抛光工艺进行研究。通过分析前后缘抛光存在的问题,结合砂带百页轮的抛光加工特点,提出前后缘百页轮柔性抛光工艺方法;基于Preston方程对抛光材料去除率进行分析,获得了影响抛光表面粗糙度的主要工艺参数(百页轮粒度、法向力、主轴转速和进给速度);采用响应面法设计抛光加工实验,分析了主要工艺参数及其交互作用对表面粗糙度的影响,建立了主要工艺参数与表面粗糙度的二阶预测模型,并得到最优工艺参数域和最优抛光工艺参数组合。前后缘百页轮抛光实验检测结果表明：前后缘表面质量明显改善,满足表面粗糙度小于Ra 0.4 μm的质量要求。

关键词: 叶片, 前后缘, 百页轮, 柔性抛光, 参数优化