加工变形是影响薄壁零件数控加工效率、精度和表面质量的关键性制约因素。本文针对航空发动机薄壁叶片精密数控加工中的变形问题 ,在分析钛合金叶片结构和工艺特点基础上 ,提出了叶片的精确定位方案、以及支撑叶片并控制弹性变形和残余应力变形的有效方法。通过五坐标数控编程和加工试验对新方法进行了验证。测试结果表明 ,采用新方法加工出的叶片满足设计性能要求 ,不但质量上优于传统制造工艺 ,而且制造成本显著降低、周期缩短 6 0 %以上 Machining distortion is the key factor that affects the machining efficiency, precision and surface quality of the thin-walled parts. In this paper, aiming at the deformation of the precision numerical control machining of aero-engine thin-walled blades, based on the analysis of the structure and technological characteristics of the titanium alloy blades, the precise positioning scheme of the blades and the effective method of supporting the blades and controlling the elastic deformation and residual stress deformation are proposed. The new method was verified by five-axis NC programming and machining test. The test results show that the blades machined by the new method meet the design performance requirements and are not only superior in quality to the traditional manufacturing processes but also significantly reduced in manufacturing costs and shortened the cycle period by more than 60%