Simulation and experimental study of 7A09 aluminum alloy milling under double liquid quenching  

7A09铝合金双液淬火的模拟和实验研究（英文）

作　　者：LUO Heng WANG You-qiang ZHANG Ping 罗恒;王优强;张平(School of Mechanical and Automotive Engineering,Qingdao University of Technology,Qingdao 266520,China;School of Mechanical and Power Engineering,East China University of Science and Technology,Shanghai 200237,China)

机构地区：[1]School of Mechanical and Automotive Engineering,Qingdao University of Technology,Qingdao 266520,China [2]School of Mechanical and Power Engineering,East China University of Science and Technology,Shanghai 200237,China

出　　处：《Journal of Central South University》2020年第2期372-380,共9页中南大学学报（英文版）

基　　金：Projects(51575289,51705270)supported by the National Natural Science Foundation of China;Project(2019GHY112068)supported by the Key Research and Development of Shandong,China

摘　　要：To explore the influence of double liquid quenching on the cutting performance of the 7A09 aluminum alloy,quasi-static compression and dynamic impact tests were carried out on the 7A09 aluminum alloy after double liquid quenching using an MTS810.23 universal testing machine and split-Hopkinson pressure bar(SHPB).The experimental data were fitted to obtain the Johnson–Cook constitutive model parameters of the alloy.Simulations of the machining process were carried out using the Deform-3D finite element software.The results showed that the rheological stress increased with the increase in strain rate and the decrease in temperature.The increase in the cutting speed and feed caused the cutting temperature to rise sharply,whereas the influence of the cutting amount on the cutting temperature was weak.Because of the presence of chip nodules,there was extremum in the cutting force vs cutting speed curves.The increase in the feed and cutting depth increased the cutting area Ac,so the cutting force also increased.The simulation results were verified by experiments.The simulation predictions were in good agreement with the test values,and the cutting force and temperature variations with the cutting parameters were the same.Thus,the correctness of the 7A09 aluminum alloy finite element model was verified.为了探究双液淬火对7A09铝合金切削加工性能的影响,基于MTS810.23万能试验机和分离式霍普金森压杆设备对双液淬火后的7A09铝合金进行了准静态压缩和动态冲击试验,并对实验数据进行拟合,得到了7A09铝合金的Johnson-Cook本构模型,应用Deform-3D有限元软件对其进行切削加工仿真研究。结果表明:双液淬火处理的7A09铝合金的流变应力随着应变速率的提高和温度的降低而增加;切削速度和进给量的增加会使切削温度急剧上升,而切削深度对切削温度的影响则较弱。因积屑瘤的存在使切削速度对切削力的影响曲线中存在极值,而进给量和切削深度的增大都会使切削面积增大,故切削力也增大。并通过试验对仿真结果进行验证,仿真值与试验值吻合较好,且切削力与切削温度随切削参数的变化趋势也相同,验证了所建7A09铝合金有限元模型的正确性。

关 键 词：7A09 aluminum alloy double liquid quenching dynamic impact performance CUTTING finite element method(FEM) 

分 类 号：TG156.3[金属学及工艺—热处理] TG146.21[金属学及工艺—金属学]