航发薄壁机匣铣削过程的装夹技术研究  

Research on Clamping Technology in Milling Process of Aero-Engine Thin-Walled Casings

作　　者：郭皓邦 魏祥政 雷学林[2] 何云[2] GUO Haobang;WEI Xiangzheng;LEI Xuelin;HE Yun(AECC South Industry Co.,Ltd.,Zhuzhou 412002,China;East China University of Science and Technology,Shanghai 200237,China)

机构地区：[1]中国航发南方工业有限公司,株洲412002 [2]华东理工大学,上海200237

出　　处：《航空制造技术》2025年第4期84-89,96,共7页Aeronautical Manufacturing Technology

摘　　要：航空发动机薄壁机匣具有复杂的流道结构,为完成铣削加工并获得较高的加工精度,需对机匣两端分别进行定位装夹加工。本文针对机匣装夹需求进行了装夹技术研究,利用有限元仿真进行谐响应分析,根据机匣加工变形量对装夹方式和压紧位置进行了选择。参考仿真结果设计了专用夹具,采用中心孔定位、底部边缘与上下辅助夹紧的复合装夹方式,有效地限制了机匣的6个自由度。机床–夹具–机匣的定位误差满足精度要求,实际加工结果显示重复装夹加工后的机匣流道满足加工精度和表面粗糙度要求。Thin-walled aero-engine casings have complex flow channel structure.In order to complete the milling machining and obtain higher machining accuracy,both ends need to be positioned and clamped respectively.The clamping technology of the casings was studied based on the clamping requirements.The finite element method was used to perform harmonic response analysis,and the clamping mode and pressing position were selected according to the deformation of the casings.A special fixture was designed according to the simulation results,and the compound clamping method of center hole positioning,bottom edge and upper-lower auxiliary clamping was adopted to effectively limit the six degrees of freedom of the casings.The calculation results show that the positioning error of the machine tool-fixture-casings meets the accuracy requirements,and the actual machining results show that the casings flow channel after repeated clamping and processing meets the machining accuracy and surface roughness requirements.

关 键 词：机匣流道 夹具 装夹方案 有限元 定位误差 

分 类 号：V263[航空宇航科学与技术—航空宇航制造工程]