微铣削高温合金GH4169表面残余应力分析与预测优化
2018-07-13
作者：马世玲，董长双
单位：太原理工大学
摘要：运用ABAQUS有限元软件对硬质合金立铣刀微铣削高温合金GH4169进行仿真，建立了三维微铣削有限元模型，分析了主轴转速、每齿进给量、轴向切削深度的改变对工件逆铣侧面残余应力的影响。分析结果表明：工件表面残余应力随着主轴转速的增大而增大；因刀刃半径的存在和尺寸效应的作用，残余应力随每齿进给量的增大先增大后减小；残余应力随铣削深度的增大而增大。最后运用神经网络群遗传算法以最小残余应力为目标对残余应力进行了预测和切削参数优化，得到了基于最小残余应力的最佳切削用量组合。
关键词：高温合金；有限元仿真；微铣削；残余应力
中图分类号：TG115+6.3；TG54；TP391.9文献标志码：A
Analysis Prediction and Optimization of Surface Residual Stress in Micromilling Superalloy GH4169
Ma Shiling，Dong Changshuang
Abstract:The finite element model of micromilling superalloy GH4169 with carbide end mills is established with ABAQUS software，and the effects of the spindle speed，axial cutting depth and feed per tooth on the residual stress of the workpiece are analyzed.The results show that the residual stress of the workpiece increases with the increase of the spindle speed，and due to the existence of the edge radius and the size effect，the residual stress increases first and then decreases with the increase of the feed per tooth，and the stress increases with the increase of the milling depth.Finally，the neural network group genetic algorithm is used to predict and optimize the cutting parameters with the minimum residual stress as the target，and the optimal cutting parameter combination is obtained.
Keywords:superalloy；finite element simulation；micromilling； residual stress