Research on High-Effect and Precise Machining Technology of Bypass Duct Split Casing
ZHANG Shigui1, ZHANG Shengwei1, CHEN Pengfei1, WANG Can1, WANG Yuhang2, WANG Guoming2, SUN Jianfei2,3
1. AECC Chengdu Engine Co., Ltd., Chengdu 610503, China;
2. School of Mechanical Engineering and Automation, BUAA, Beijing 100191, China;
3. Jingdezhen Research Institute of Beihang University, Jingdezhen 333032, China)
The machining quality of the casing is very important to the manufacturing and performance of the aeroengine. Due to the split structure, the machining process of the split casing is complicated and the machining quality is difficult to control. In this work, the two optimization indexes of high-precision and high-efficiency are taken as the focus to study the processing flow of the bypass duct split casing. Combined with the material characteristics and structural characteristics, the processing difficulties of the titanium alloy split casing are summarized and analyzed. The process scheme is designed for the key processing difficulties, including the selection of high-precision processing equipment, the selection of tooling fixtures in each process, the selection of tools and the setting of process parameters. On this basis, the milling process of the casing outer surface with complex features is focused on, and the processing area is divided to complete the determination of different milling methods and CNC tool paths. Finally, the cutting process was simulated and a complete and detailed machining process was obtained. Through the actual parts processing verification, the optimized process has improved the processing accuracy and processing efficiency. In this work, the research is carried out from the aspects of process route and cutting parameters, which effectively reduces the machining deformation of the parts, obtains the precise and efficient machining method of the bypass duct split casing processing, and provides some experience for the processing of large annular thin-walled parts.
张世贵,张晟玮,陈鹏飞,王灿,王宇航,王国名,孙剑飞. 外涵对开机匣精密高效加工工艺研究[J]. 航空制造技术, 2023, 66(14): 100-106.
ZHANG Shigui, ZHANG Shengwei, CHEN Pengfei, WANG Can, WANG Yuhang, WANG Guoming, SUN Jianfei. Research on High-Effect and Precise Machining Technology of Bypass Duct Split Casing[J]. Aeronautical Manufacturing Technology, 2023, 66(14): 100-106.