双曲率2219铝合金板蠕变时效成形技术研究
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摘要
进行了淬火态2219铝合金板材在175℃下18 h,70～130 MPa应力水平的拉伸蠕变试验,选择了修正的7参量Kowalewski本构模型拟合得到材料参数。通过3种单曲率铝板蠕变成形的有限元模拟和试验,测得试验回弹率与预测值最大误差为9.5%,验证了材料模型的正确性。开展了双曲率铝板零件蠕变成形有限元模拟并基于模拟结果采用偏差调节法进行了4次模具型面迭代补偿,模拟得到零件型面与设计型面之间的最大偏差降至0.19 mm。进行了双曲率板175℃,18 h的蠕变时效成形试验验证,得到试验件弯曲挠度最大偏差为11.19%,偏差主要集中于零件心部。
Creep tests of quenched 2219 aluminum alloy were carried out under the stress from 70 to 130 MPa at 175 ℃ aging for 18 h.The material parameters were obtained by fitting using modified Kowalewski creep constitutive model with seven parameters.Through the finite element simulation and experiment of single curvature aluminum panel creep age forming of three radiuses,the maximum error between the test springback rate and prediction value was measured to be 9.5%,and the accuracy of the model was verified.The creep age forming process of double curvature panel was simulated.The die surface was modified after four times iterative compensation using displacement adjustment method based on the simulation results and the largest error between simulated surface and designed surface is reduced to 0.19 mm.The forming test for double curvature panel at 175 ℃ for 18 h was carried out,the maximum deflection error of formed panel was 11.9%,and the deviation was mainly concentrated in the center of the part.
Creep tests of quenched 2219 aluminum alloy were carried out under the stress from 70 to 130 MPa at 175 ℃ aging for 18 h.The material parameters were obtained by fitting using modified Kowalewski creep constitutive model with seven parameters.Through the finite element simulation and experiment of single curvature aluminum panel creep age forming of three radiuses,the maximum error between the test springback rate and prediction value was measured to be 9.5%,and the accuracy of the model was verified.The creep age forming process of double curvature panel was simulated.The die surface was modified after four times iterative compensation using displacement adjustment method based on the simulation results and the largest error between simulated surface and designed surface is reduced to 0.19 mm.The forming test for double curvature panel at 175 ℃ for 18 h was carried out,the maximum deflection error of formed panel was 11.9%,and the deviation was mainly concentrated in the center of the part.
引文
[1]曾元松,黄遐,黄硕.蠕变时效成形技术研究现状与发展趋势[J].塑性工程学报.2008,15(3):1-8.ZENG Yuansong,HUANG Xia,HUANG Shuo.The research situation and the developing tendency of creep age forming technology[J].Journal of Plasticity Engineering,2008,15(3):1-8.
[2]ZHAN L,LIN J,DEAN T A.A review of the development of creep age forming:experimentation,modelling and applications[J].International Journal of Machine Tools&Manufacture,2011,51(1):1-17.
[3]YANG Y,ZHAN L,MA Q,et al.Effect of pre-deformation on creep age forming of AA2219 plate:Springback,microstructures and mechanical properties[J].Journal of Materials Processing Technology,2015,229:697-702.
[4]刘欣,王国庆,李曙光,等.重型运载火箭关键制造技术发展展望[J].航天制造技术,2013,(1):1-6.LIU Xin,WANG Guoqing,LI Shuguang,et al.Forecasts on crucial manufacturing technology develeopment of heavy lift launch vehicle[J].Aerospace Manufacturing Technology,2013,(1):1-6.
[5]万李,杨浩亮,丁鹏飞,等.2219铝合金带筋条板材蠕变时效成形试验研究[J].航天制造技术,2014,(4):36-38.WAN Li,YANG Haoliang,DING Pengfei,et al.Study on the creep age forming of iso-grid panel of 2219[J].Aerospace Manufacturing Technology,2014,(4):36-38.
[6]吕凤工,黄遐,曾元松,等.7B04铝合金带筋构件蠕变时效成形数值模拟与试验[J].塑性工程学报,2017,24(3):19-24.LFenggong,HUANG Xia,ZENG Yuansong,et al.Numerical simulation and experiment on creep age forming for 7B04 aluminium alloy stiffened component[J].Journal of Plasticity Engineering,2017,24(3):19-24.
[7]黄霖,万敏,吴向东,等.整体壁板时效成形的回弹预测及模面补偿技术[J].航空学报,2009,30(8):1531-1536.HUANG Lin,WAN Min,WU Xiangdong,et al.Prediction of springback and tool surface modification technology for age forming of integral panel[J].Acta Aeronautica et Astronautica Sinica,2009,30(8):1531-1536.
[8]ZHAN L,LIN J,DEAN T A,et al.Experimental studies and constitutive modelling of the hardening of aluminium alloy 7055 under creep age forming conditions[J].International Journal of Mechanical Sciences,2011,53(8):595-605.
[9]BRANDA-O F M,DELIJAICOV S,BORTOLUSSI R.CAF-Asimplified approach to calculate springback in Al 7050 alloys[J].International Journal of Advanced Manufacturing Technology,2017,91(9):1-12.
[10]KOWALEWSKI Z L,HAYHURST D R,DYSON B F.Mechanisms-based creep constitutive equations for an aluminum alloy[J].Journal of Strain Analysis for Engineering Design,1994,29(4):309-315.
[2]ZHAN L,LIN J,DEAN T A.A review of the development of creep age forming:experimentation,modelling and applications[J].International Journal of Machine Tools&Manufacture,2011,51(1):1-17.
[3]YANG Y,ZHAN L,MA Q,et al.Effect of pre-deformation on creep age forming of AA2219 plate:Springback,microstructures and mechanical properties[J].Journal of Materials Processing Technology,2015,229:697-702.
[4]刘欣,王国庆,李曙光,等.重型运载火箭关键制造技术发展展望[J].航天制造技术,2013,(1):1-6.LIU Xin,WANG Guoqing,LI Shuguang,et al.Forecasts on crucial manufacturing technology develeopment of heavy lift launch vehicle[J].Aerospace Manufacturing Technology,2013,(1):1-6.
[5]万李,杨浩亮,丁鹏飞,等.2219铝合金带筋条板材蠕变时效成形试验研究[J].航天制造技术,2014,(4):36-38.WAN Li,YANG Haoliang,DING Pengfei,et al.Study on the creep age forming of iso-grid panel of 2219[J].Aerospace Manufacturing Technology,2014,(4):36-38.
[6]吕凤工,黄遐,曾元松,等.7B04铝合金带筋构件蠕变时效成形数值模拟与试验[J].塑性工程学报,2017,24(3):19-24.LFenggong,HUANG Xia,ZENG Yuansong,et al.Numerical simulation and experiment on creep age forming for 7B04 aluminium alloy stiffened component[J].Journal of Plasticity Engineering,2017,24(3):19-24.
[7]黄霖,万敏,吴向东,等.整体壁板时效成形的回弹预测及模面补偿技术[J].航空学报,2009,30(8):1531-1536.HUANG Lin,WAN Min,WU Xiangdong,et al.Prediction of springback and tool surface modification technology for age forming of integral panel[J].Acta Aeronautica et Astronautica Sinica,2009,30(8):1531-1536.
[8]ZHAN L,LIN J,DEAN T A,et al.Experimental studies and constitutive modelling of the hardening of aluminium alloy 7055 under creep age forming conditions[J].International Journal of Mechanical Sciences,2011,53(8):595-605.
[9]BRANDA-O F M,DELIJAICOV S,BORTOLUSSI R.CAF-Asimplified approach to calculate springback in Al 7050 alloys[J].International Journal of Advanced Manufacturing Technology,2017,91(9):1-12.
[10]KOWALEWSKI Z L,HAYHURST D R,DYSON B F.Mechanisms-based creep constitutive equations for an aluminum alloy[J].Journal of Strain Analysis for Engineering Design,1994,29(4):309-315.