外涵对开机匣精密高效加工工艺研究  

Research on High-Effect and Precise Machining Technology of Bypass Duct Split Casing

作　　者：张世贵 张晟玮 陈鹏飞 王灿 王宇航 王国名 孙剑飞[2,3] ZHANG Shigui;ZHANG Shengwei;CHEN Pengfei;WANG Can;WANG Yuhang;WANG Guoming;SUN Jianfei(AECC Chengdu Engine Co.,Ltd.,Chengdu 610503,China;School of Mechanical Engineering and Automation,BUAA,Beijing 100191,China;Jingdezhen Research Institute of Beihang University,Jingdezhen 333032,China)

机构地区：[1]中国航发成都发动机有限公司,成都610503 [2]北京航空航天大学机械工程及自动化学院,北京100191 [3]北京航空航天大学江西研究院景德镇分院,景德镇333032

出　　处：《航空制造技术》2023年第14期100-106,共7页Aeronautical Manufacturing Technology

基　　金：四川省重大科技专项(2021ZDZX0001、2021ZDZX0002);中国航空发动机集团产学研合作项目(HFZL2019CXY026)。

摘　　要：机匣的加工质量对航空发动机制造和使用性能极为重要,其中对开机匣由于自身的分割式结构导致其加工工序繁冗,加工质量难以控制。本文以高精度、高效率两项优化指标为重点对对开机匣加工工艺流程展开研究,结合材料特点及结构特点总结分析钛合金外涵对开机匣的加工难点,针对重点加工难点设计工艺方案,包含高精度加工设备的选择、各工序工装夹具的选择及刀具选择与工艺参数的设定等。在此基础上重点关注特征复杂的机匣外型面铣削加工过程,对其加工区域进行划分,完成不同工序铣削方式及数控走刀路线的确定,最终对切削过程进行模拟仿真,获得完备细化的加工工艺流程。经实际零件加工验证,优化后的工艺在加工精度和加工效率方面都有所提升。本文从工艺路线及切削参数等方面进行研究,有效减小了零件加工变形,获得外涵对开机匣加工的精密高效加工方法,为大型环形对开薄壁零件的加工提供一定的经验。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.

关 键 词：钛合金 夹具 刀具 外涵对开机匣 数控加工 

分 类 号：V263[航空宇航科学与技术—航空宇航制造工程]