The frame thin-walled parts’ optimization method about processing technology and tool path parameters

Most of the aerospace thin-walled parts are characterized by large size, complex shape, thin-walled structure, etc. Improving the machining performance of thin-walled parts is of great significance in the aerospace industry. A tool trajectory generation method with a short total length and high smoothness is a necessary prerequisite for improving machining performance. To improve the machining quality and efficiency, an optimization method for the machining of box-shaped thin-walled parts is proposed, which specifically includes process optimization and the optimization method of tool trajectory parameters based on the secondary development of CAM software. Firstly, the structural characteristics of the box-shaped thin-walled parts are analyzed to optimize the process of machining the parts. Then, the operational efficiencies of the improved SPFA, SPFA, and Dijkstra algorithms are compared and analyzed to apply the improved SPFA algorithm to the ring-cutting tool path generation process. Next, the CAM software is used to carry out CNC simulation optimization to determine the tool path and feed speed. Finally, the optimized process parameters and tool trajectory are imported into the CAM software to form a tool position file, which is then converted into NC code for actual machining through post-processing. The frame thin-walled parts’ optimization method about processing technology and tool path parameters was verified through machining experiments to be effective in improving the machining quality and efficiency of titanium alloy frame-shaped thin-walled parts.