ABAQUS二次开发在列车薄壁框体零件铣削变形预测中的应用

Application of ABAQUS Secondary Development in Milling Deformation Prediction of Train Thin-walled Frame Parts

针对列车薄壁框体零件在铣削加工中易产生变形且变形无法直接预测的难题,通过Python脚本语言对ABAQUS有限元软件进行二次开发,将实际铣削力简化为静态铣削力,建立了人机交互、参数化建模的“日”型薄壁框体零件铣削变形预测插件,利用插件对比研究了无填充情况以及分别使用纯石蜡、聚氨酯填充加固后的零件侧壁铣削加工变形量。结果表明:纯石蜡填充加固变形最小,聚氨酯泡沫填充加固次之,无填充时加工变形最大。该研究为减小框类零件加工制造过程中的铣削变形提供了方法,同时为其他相关领域的二次开发提供参考。

Aiming at the problem that the train thin-walled frame parts are easy to deform during producing and the deformation can not be directly predicted in milling, the finite element software ABAQUS is redeveloped by Python script language, the actual milling force is simplified into static milling force, and thin-walled frame parts milling deformation prediction plug-in with human-computer interaction and parametric modeling is established.The plug-in is used to compare and study the milling deformation prediction plug-in without filling and using pure paraffin.The results show that the deformation of the side wall of the parts is the smallest for filling and strengthening, followed by the polyurethane foam.The deformation is the largest without filling, which provides a method for reducing the milling deformation of the frame parts in the actual parts processing, and has reference significance for the two development of other related fields.