Machining distortion prediction of aerospace monolithic components  

作　　者：Yun-bo BI Qun-lin CHENG Hui-yue DONG Ying-lin KE 

机构地区：[1]State Key Lab of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, China [2]Shanghai Spaceflight Precision Machinery Research Institute, Shanghai 201600, China

出　　处：《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》2009年第5期661-668,共8页浙江大学学报（英文版）A辑（应用物理与工程）

基　　金：Project (No. 50435020) supported by the National Natural Science Foundation of China

摘　　要：To predict the distortion of aerospace monolithic components, a model is established to simulate the numerical control (NC) milling process using 3D finite element method (FEM). In this model, the cutting layer is simplified firstly. Then, the models of cutting force and cutting temperature are established to gain the cutting loads, which are applied to the mesh model of the part. Finally, a prototype of machining simulation environment is developed to simulate the milling process of a spar. Key factors influencing the distortion, such as initial residual stress, cutting loads, fixture layout, cutting sequence, and tool path are considered all together. The total distortion of the spar is predicted and an experiment is conducted to validate the numerical results. It is found that the maximum discrepancy between the simulation results and experiment values is 19.0%To predict the distortion of aerospace monolithic components, a model is established to simulate the numerical control （NC） milling process using 3D finite element method （FEM）. In this model, the cutting layer is simplified firstly. Then, the models of cutting force and cutting temperature are established to gain the cutting loads, which are applied to the mesh model of the part. Finally, a prototype of machining simulation environment is developed to simulate the milling process of a spar. Key factors influencing the distortion, such as initial residual stress, cutting loads, fixture layout, cutting sequence, and tool path are considered all together. The total distortion of the spar is predicted and an experiment is conducted to validate the numerical results. It is found that the maximum discrepancy between the simulation results and experiment values is 19.0%.

关 键 词：Monolithic component Machining distortion Finite element simulation 

分 类 号：TG501.4[金属学及工艺—金属切削加工及机床] TV698.11[水利工程—水利水电工程]