7075-T651铝合金车削表面残余应力模拟及参数优化
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摘要
采用有限元软件对7075-T651铝合金干切削过程进行模拟,获得在不同影响因素下的工件表面残余应力值。然后对仿真结果进行方差分析,得到切削速度、进给量和背吃刀量对工件表面残余应力的影响情况,并通过线性回归方法建立切削表面残余应力的数学模型。建立以较小残余压应力和最大材料去除率为目标函数的双目标优化模型,应用matlab多目标遗传算法工具箱对模型进行寻优求解,获得优化后的铝合金车削的切削参数,为其在实际切削加工中选择合理的切削参数提供了参考依据。
The finite element software is used to simulate the dry cutting process for 7075-T651 Aluminum alloy, and get the surface residual stress of workpiece under different factors. The simulation results were analyzed by analysis of variance(ANOVA). The contribution of cutting speed, feed rate and cutting depth to the surface residual stress of workpiece were obtained. The mathematical model of residual stress on the cutting surface is established by linear regression method. A bi-objective optimization model with minimum residual compressive stress and maximum material removal rate as the objective function was created. The matlab multi-objective genetic algorithm toolbox is selected to solve the model and got the optimized cutting parameters for aluminum alloy after turning. It provides a basis for reference for selecting reasonable cutting parameters in actual cutting.
The finite element software is used to simulate the dry cutting process for 7075-T651 Aluminum alloy, and get the surface residual stress of workpiece under different factors. The simulation results were analyzed by analysis of variance(ANOVA). The contribution of cutting speed, feed rate and cutting depth to the surface residual stress of workpiece were obtained. The mathematical model of residual stress on the cutting surface is established by linear regression method. A bi-objective optimization model with minimum residual compressive stress and maximum material removal rate as the objective function was created. The matlab multi-objective genetic algorithm toolbox is selected to solve the model and got the optimized cutting parameters for aluminum alloy after turning. It provides a basis for reference for selecting reasonable cutting parameters in actual cutting.
引文
[1]李户航,郑小伟,陈艳妮,等.7075-T651铝合金薄壁件加工仿真研究[J].现代制造工程,2018(2):107-113.
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[12]王洪铎,周勇,石凯.盲孔法残余应力测试中的电阻应变片粘贴技术[J].焊管,2009,32(3):35-37.
[13]姚忠.灰关联度分析优化SKD11电火花线切割电参数研究[J].机械设计与研究,2017,33(5):139-142.
[14]蔡飞飞,任违,陈行行.基于田口法和方差分析的整体叶轮高速铣削参数优化研究[J].机床与液压,2016,44(2):4-6.
[15]樊艮,王剑平.一种基于遗传算法的多目标优化算法研究[J].硅谷,2012(1):103-104.
[2]刘海涛,卢泽生,孙雅洲.切削加工表面残余应力研究的现状与进展.[J].航空精密制造技术,2008(2):17-19.
[3]CHANG H,LI S,SHI R.Design and manufacturing technology of high speed milling cutter for Aluminum alloy[J].Procedia Engineering,2017,174:630-637.
[4]SUJIT P,ANIKET S,SATISH C,et al.Residual stresses during hard turning of AISI 52100 steel:numerical modelling with experimental validation[M].Materials Today:Proceedings,2017(4):2350-2359.
[5]GUO Y B,LIU C R.FEM analysis of mechanical state on sequentially machined surfaces[J].Machining Science and Technology,2002,6(1):21-41.
[6]吴春雨,沈浩,殷俊,等.干切加工零件表面残余应力影响因素的仿真分析,2017:51:18-21.
[7]杜浩,尹念东.基于advantedge的镍基合金GH4169车削残余应力模拟分析.[J].湖北理工学院学报,2014(2):11-15.
[8]陈涛.切削加工表面完整性的理论和方法[M].北京:科学出版社,2015.
[9]杜倩倩.硬态硬钢切屑车削淬形成机理及表面完整性研究[D].山东:济南大学,2016.
[10]李登万,陈洪涛,钟成明,基于均匀设计的车削表面残余应力试验[J]机械设计与研究,2014,30(4)100-104.
[11]卓一杉.薄壁框架件加工的残余应力仿真分析与切削参数优化[D].湖南:湘潭大学,2017.
[12]王洪铎,周勇,石凯.盲孔法残余应力测试中的电阻应变片粘贴技术[J].焊管,2009,32(3):35-37.
[13]姚忠.灰关联度分析优化SKD11电火花线切割电参数研究[J].机械设计与研究,2017,33(5):139-142.
[14]蔡飞飞,任违,陈行行.基于田口法和方差分析的整体叶轮高速铣削参数优化研究[J].机床与液压,2016,44(2):4-6.
[15]樊艮,王剑平.一种基于遗传算法的多目标优化算法研究[J].硅谷,2012(1):103-104.