| 基于三维成形极限应力图的AA6061挤压管材成形性能分析 |
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| 引用本文： | 朱良金,陈孟杰,王威,杜飞,董国疆.基于三维成形极限应力图的AA6061挤压管材成形性能分析[J].中国机械工程,2019,30(11):1367. |
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| 作者姓名： | 朱良金 陈孟杰 王威 杜飞 董国疆 |
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| 作者单位： | 燕山大学河北省特种运载装备重点实验室，秦皇岛，066004 |
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| 基金项目： | 国家自然科学基金资助项目（51775481）；
河北省教育厅高等学校科技计划资助重点项目（ZD2017078）；
河北省新世纪“三三三人才工程”人才培养资助项目（A2016002017） |
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| 摘 要： | 为解决AA6061挤压管材成形性能极差的问题，建立了“固溶水淬+颗粒介质胀形+人工时效”的铝合金管件成形工艺流程。研究了固溶水淬和人工时效工艺参数对材料性能影响规律，并建立了考虑厚向应力的三维成形极限应力图；建立了管件颗粒介质胀形有限元仿真模型，分析管件变形特征质点的运动轨迹和应力应变状态，并应用理论成形极限图对管件破裂失稳点和胀形极限进行分析和预判。四方截面管件胀形工艺试验结果表明，颗粒介质胀形工艺与合适的热处理工艺相结合能够有效地解决AA6061挤压管材的成形问题；考虑厚向应力的三维成形极限应力图可作为铝合金管件胀形工艺方案制定的破裂失稳判据。
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| 关 键 词： | 铝合金 管材胀形 固溶处理 成形极限图 |
Analysis of Forming Performances for AA6061 Extruded Tubes Based on 3D Forming Limit Stress Diagram |
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| ZHU Liangjin,CHEN Mengjie,WANG Wei,DU Fei,DONG Guojiang.Analysis of Forming Performances for AA6061 Extruded Tubes Based on 3D Forming Limit Stress Diagram[J].China Mechanical Engineering,2019,30(11):1367. |
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| Authors: | ZHU Liangjin CHEN Mengjie WANG Wei DU Fei DONG Guojiang |
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| Affiliation: | Hebei Key Laboratory of Special Delivery Equipment,Yanshan University，Qinhuangdao，Hebei,066004 |
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| Abstract: | To solve the problems of poor forming performances for AA6061 extruded tubes, a new forming process including solution water quenching, granular medium bulging and artificial aging treatment were established for aluminum alloy tubes . The influences of solution water quenching and artificial aging treatment on the properties of the materials were studied. And considering the through thickness normal stresss, a three-dimensional forming limit stress diagram(3D-FLSD) was established. Meanwhile, the finite element simulation model of tube granular medium bulging was established to analyze the deformation trajectories and stress-strain states of the points and predict the rupture points and bulging limits of tubes by theoretical forming limit diagram. The bulging process experimental results of square section tube parts show that the combination of granule medium bulging and reasonable heat treatment may effectively solve the forming problems of the AA6061 extruded tubes. And 3D-FLSD considering the through thickness normal stresses may be used as the criterion for judging the fracture and instability of aluminum alloy tubes when formulating the bulging processes. |
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| Keywords: | aluminum alloy tube bulging of tube solution treatment forming limit diagram |
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