基于响应面法的薄壁件铣削参数有限元优化

2019-10-12

作者：郭子晛，姚呈祥，赵祖阳，贾晓林，葛英飞，贾丙辉单位：南京工程学院

摘要：铝镁合金薄壁结构件在航空工业中广泛应用，但在其加工过程中常因为刚度不足而引起变形。针对上述问题，提出一种基于响应面法的铣削加工参数有限元仿真方法，可有效控制变形及加工质量。对圆柱螺旋立铣刀的铣削加工过程建立刀具平均切削力模型，并将该模型应用于有限元仿真试验。通过对BoxBehnken法设计的四因素三水平试验结果进行分析，探讨了切削速度、切削深度、切削宽度和每齿进给量等4个因素与切削变形的关系。同时，以工程中的典型薄壁结构件为例，优化了该类薄壁结构件的铣削参数，经有限元仿真验证，该优化方法能够有效控制铣削过程的变形。

关键词：铝镁合金；薄壁结构；有限元；响应面法；铣削参数

中图分类号：TG54；TH161文献标志码：ADOI：10.3969/j.issn.1000-7008.2019.10.010

Finite Element Optimization of Thinwalled Part Milling Parameter

Based on Response Surface Methodology

Guo Zixian，Yao Chengxiang，Zhao Zuyang，Jia Xiaolin，Ge Yingfei，Jia Binghui

Abstract:Aluminummagnesium alloy thinwalled structural parts are widely used in aviation industry.However，it is often deformed due to insufficient stiffness during its processing.Aiming at the problem，a finite element simulation method of milling machining parameters based on response surface method is proposed to effectively control the deformation and processing quality.The milling process of cylindrical spiral end mills is modeled and the average cutting force model of the tool is established.The model is applied to the finite element simulation test.Through the analysis of the fourfactor and threelevel test results designed by BoxBehnken method，the relationship between cutting speed，cutting depth，cutting width and feed per tooth is studied.At the same time，the typical machining examples in the project are taken as examples to optimize the milling parameters of the thinwalled structural parts.The finite element simulation proves that the optimization method can effectively control the deformation of the milling process.

Keywords:aluminummagnesium alloy；thinwalled structural；FEA；RSM；milling parameters