复杂直纹曲面薄壁件在航空领域有着广泛应用，五轴侧铣加工是获取此类零件的主要方式。由于工艺系统的弱刚性（薄壁零件、细长刀具）以及切削几何的复杂性（非可展曲面、接触状态时变、刀具偏心），精加工后的零件容易出现时变切削力引起的让刀变形误差以及复杂曲面特征导致的局部表面粗糙度过大等问题。在实际生产过程中，为了提高零件的合格率，工艺人员常采用试切的方法，根据零件最为薄弱的区域确定出安全的工艺参数，并在整个走刀过程中保持不变，从而浪费了大量的加工时间。为此，本研究拟通过数控加工过程建模方法，在对每一个刀位处的加工变形误差和表面粗糙度进行准确预测的基础上，通过调整工艺参数来适应不同加工位置处的工艺系统动静态特性变化，以期在满足航空薄壁件轮廓精度和表面质量的前提下，最大程度上提高加工效率。本课题研究成果将对促进CAD/CAE/CAM等相关学科发展和提高我国先进制造工艺水平具有重要意义。

Thin-walled parts with complex ruled surfaces are widely used in the aviation field. Five-axis flank milling is the main way to obtain such parts. Due to the weak rigidity of the process system (thin-walled parts, slender cutters) and the complexity of the cutting geometry (non-developable surfaces, time-varying contact state, tool eccentricity), the parts after finishing are prone to the problems of tool deformation error caused by time-varying cutting forces and local surface roughness caused by the characteristics of complex surfaces. In the actual production process, in order to improve the qualified rate of parts, technicians often adopt the method of trial cutting to determine the safe process parameters according to the weakest area of parts, and keep the same throughout the cutting process, thus wasting a lot of processing time. Therefore, based on the accurate prediction of deformation error and surface roughness at each cutter location, this research intends to adapt the dynamic and static characteristics of the process system at different processing locations by adjusting the process parameters, so as to maximize the machining accuracy and surface quality of thin-walled aeronautical parts on the premise of satisfying the contour accuracy and surface quality of thin-walled aeronautical parts. Efficiency. The research results of this subject will be of great significance for promoting the development of related disciplines such as CAD/CAE/CAM and improving the advanced manufacturing technology level in China.