复杂薄壁件在航空航天等有极高性能要求的复杂装备上的应用日益广泛，其制造精度和加工质量将直接影响装备的极限工况性能。为提高复杂薄壁件的加工精度，本项目提出以下两大方面的研究内容：基于薄壁件在微量润滑条件下考虑高速切削振动与变形时的切削力模型，优化薄壁件高速切削加工工艺参数，建立并完善面向薄壁件的高速切削加工工艺参数库，提出薄壁件高速加工的五轴加工刀位轨迹计算方法；从面向五轴高速加工刀位轨迹精确控制的角度出发来研究在CNC系统内部实现五轴加工刀位间的高速转接、五轴离散刀位的样条化处理以及适应高速高精加工的轨迹速度前瞻控制的方法，提出将CAM系统计算的五轴高速加工刀位直接输入CNC系统进行轨迹控制的新原理和机制，最终建立并完善复杂薄壁件高速加工CAM/CNC集成制造工艺系统与方法。本项目相关基础问题的深入开展和研究，对提升复杂薄壁件五轴高速精密制造技术水平具有重要的理论意义和实际应用价值。

Complicated thin-walled parts are widely used in complex equipments with high performance requirements such as aerospace equipment etc. and the extreme condition performance of the equipments is directly affected by their manufacturing precision and machining quality. In order to improve the processing accuracy of the complicated thin-wall parts, the following two aspects of research plans are put forward in this project. Firstly, based on the micro-lubricating condition of the thin wall parts and the high-speed cutting force model with consideration of cutting vibration and deformation, high speed machining process parameters of cutting a thin-walled work-piece are optimized and high-speed machining parametrical library is established and fulfilled. Five-axis machining tool path calculation method is presented for high-speed machining of thin-walled parts; The other aspect is the methods for realizing high speed transition of 5-axis machining cutter locations in the CNC system, processing the discrete 5-axis cuter locations as spline and look-ahead controlling of path velocity adaptive to high speed and high precision machining are thoroughly researched from the point on five axis high speed machining tool path accurately control. The new principle and mechanism with CAM system calculation of five axis high speed machining tool position directly into CNC system for trajectory control are also proposed in this project. Eventually the high speed machining technology of complex thin wall castings for CAM / CNC integrated manufacturing system and method is established and perfected. The basic scientific problems being deeply put forward and developed in this project have important theoretical significance and practical application value for promoting the 5-axis high-speed precision manufacturing technology level of the complicated thin-walled parts.