加工残余应力诱导的薄壁件变形预测
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摘要
针对侧铣过程的变形分析,考虑到三维仿真模拟的时间成本比较高,将侧铣过程简化为二维有限元模型进行计算分析,基于简化的铣削模型研究了切削工艺参数对于残余应力的影响以及切削残余应力诱导的薄壁件加工变形。忽略残余应力在加工表面的不均匀分布,并且将薄壁件简化为梁结构,利用残余应力的有限元仿真结果,通过微元法和等效应变能计算得到薄壁件的最大变形量。
For the deformation analysis of side milling process, due to high time cost of 3D simulation,simplified the side milling process into a two-dimensional finite element model for calculation and analysis. Based on the simplified milling model, the cutting process parameters effects on residual stress as well as deformation of the thin-walled parts induced by cutting residual stress were investigated. The uneven distribution of residual stress on the machined surface was neglected, and the thin-walled part was simplified into a beam structure. The maximum deformation of the thin-walled part was calculated by infinitesimal method and the equivalent strain energy using the finite element simulation results of the residual stress.
For the deformation analysis of side milling process, due to high time cost of 3D simulation,simplified the side milling process into a two-dimensional finite element model for calculation and analysis. Based on the simplified milling model, the cutting process parameters effects on residual stress as well as deformation of the thin-walled parts induced by cutting residual stress were investigated. The uneven distribution of residual stress on the machined surface was neglected, and the thin-walled part was simplified into a beam structure. The maximum deformation of the thin-walled part was calculated by infinitesimal method and the equivalent strain energy using the finite element simulation results of the residual stress.
引文
[1]杨吟飞,张峥,李亮,等. 7085铝合金残余应力及加工变形的数值仿真与试验[J].航空学报, 2014, 35(2):574-581.
[2]王毅哲,王大伟.剖分式薄壁轴瓦车削变形分析及解决方法探索[J].煤矿机械, 2018, 39(4):63-64.
[3]周勇.薄壁件切削加工残余应力的模拟及实验分析[J].工具技术, 2016, 50(5):45-49.
[4]王民,刘宇男,孙国智,等.初始残余应力和切削残余应力对薄壁件加工变形的影响[J].北京工业大学学报, 2017, 43(8):1 141-1 147.
[5]孙雅洲,刘海涛,卢泽生.基于热力耦合模型的切削加工残余应力的模拟及试验研究[J].机械工程学报,2011, 47(1):187-193.
[2]王毅哲,王大伟.剖分式薄壁轴瓦车削变形分析及解决方法探索[J].煤矿机械, 2018, 39(4):63-64.
[3]周勇.薄壁件切削加工残余应力的模拟及实验分析[J].工具技术, 2016, 50(5):45-49.
[4]王民,刘宇男,孙国智,等.初始残余应力和切削残余应力对薄壁件加工变形的影响[J].北京工业大学学报, 2017, 43(8):1 141-1 147.
[5]孙雅洲,刘海涛,卢泽生.基于热力耦合模型的切削加工残余应力的模拟及试验研究[J].机械工程学报,2011, 47(1):187-193.