框类整体结构件铣削加工顺序的有限元模型  

Finite element model of milling process sequence forframe monolithic components

作　　者：黄志刚[1] 柯映林[1] 董辉跃[1] 

机构地区：[1]浙江大学现代制造工程研究所,浙江杭州310027

出　　处：《浙江大学学报（工学版）》2005年第3期368-372,共5页Journal of Zhejiang University：Engineering Science

基　　金：国家自然科学基金资助项目(50175102).

摘　　要：为了控制尺寸大、形状复杂的航空框类整体在铣削加工时产生的变形,建立了铣削加工时的变形场和温度场的有限元模型.在深入研究残余应力施加、动态切削载荷、约束转换等铣削加工模拟关键技术的基础上,采用热力耦合模式进行了求解.利用该模型对整体框类结构件进行了奇偶铣削、偶奇铣削和顺序铣削三种加工顺序的有限元模拟.结果表明,三种模拟结果中奇偶铣削加工得到的结构件的变形最小.该模型对三种加工顺序的模拟结果与试验结果一致,可用于预测整体结构件的加工变形.To resolve the problem of distortion of large-complex aerospace monolithic components during milling process, a finite element model (FEM) of milling process simulation in distortion field and temperature field was established. Some key models including initial residual stress model, dynamic cutting load model and restriction transform model were built and researched deeply by coupled thermo-mechanical method. Three milling machining sequences consisting of ordinal, odd-even and even-odd were simulated based on the model for frame monolithic components. The experimental results show that distortion of the monolithic component from odd-even of the three different sequences is the smallest. The agreement of simulation and experimental results proves the validity of the model for predicting distortion law of aerospace monolithic components due to milling process.

关 键 词：整体结构件 铣削加工 有限元模拟 

分 类 号：TH123.2[机械工程—机械设计及理论]