差温轧制6063/7072铝合金复合板有限元模拟及翘曲影响因素  

Finite Element Simulation and Warping Influencing Factors of Differential Temperature Rolling 6063/7072 Aluminum Alloy Composite Plate

作　　者：傅邦杰 彭文飞[1,2] 林龙飞 李贺 邵熠羽 朱盛明 FU Bangjie;PENG Wenfei;LIN Longfei;LI He;SHAO Yiyu;ZHU Shengming(College of Mechanical Engineering and Mechanics,Ningbo University,Ningbo 315211,Zhejiang,China;Zhejiang Provincial Key Lab of Part Rolling Technology,Ningbo 315211,Zhejiang,China)

机构地区：[1]宁波大学机械工程与力学学院,浙江宁波315211 [2]浙江省零件轧制成形技术研究重点实验室,浙江宁波315211

出　　处：《材料导报》2024年第15期62-69,共8页Materials Reports

基　　金：国家自然科学基金(52075272);宁波市科技创新2025重大专项(2021Z099);省属高校基本科研战略引导项目(SJLZ2021002)。

摘　　要：高能量密度动力电池的发展对液冷板提出了高安全、高性能制造要求,针对传统“冲压-钎焊”工艺焊合可靠性低、界面抗冲击性差等缺点,本工作提出“差温轧制-吹胀”新工艺以制备结合良好、界面质量高的6063/7072铝合金液冷板。但异质金属的轧制易形成翘曲缺陷,导致后续吹胀工艺无法正常进行,因此亟需研究轧制液冷板的翘曲机理及其影响规律。本工作通过ANSYS/LS-DYNA有限元仿真和实验相结合的方式,研究了其差温轧制过程中的翘曲行为及其机理,分析了工艺参数对翘曲曲率的影响规律。结果表明:轧制方向的应力不协调导致6063铝合金板相对7072铝合金板需产生更大形变以达到应力平衡,轧制方向的应力差可以用来表征6063/7072铝合金液冷板的翘曲情况;提高轧制压下率、增大轧制温度差以及减小6063铝合金板厚度比例可有效降低液冷板的翘曲曲率,从而提高液冷板成形精度;实验与仿真的翘曲曲率相对误差小于5.58%,表明本研究的有限元模型准确可靠;通过差温轧制实验得到了6063/7072铝合金复合板,表明差温轧制复合板技术方案可行,为液冷板的高性能制造提供了有效途径。The development of high-energy-density power batteries imposes stringent manufacturing requirements on liquid cooling plates,demanding both high safety and high performance.A novel differential temperature rolling-blowing process is proposed to successfully prepared the 6063/7072 aluminum alloy liquid-cooled plates with excellent bonding and high interface quality for addressing the drawbacks such as low weld reliability and poor interface impact resistance in the traditional stamp-brazing process.However,the heterogeneous metal composite plate is easy to form warping defects after rolling,which leads to the failure of the subsequent blowing process.Therefore,it is urgent to study the warping mechanism and its influence law of the rolled liquid-cooled plate.Through a combination of ANSYS/LS-DYNA finite element simulation and experiments,this paper investigates the warping behavior and mechanism during the differential temperature rolling process,analyzing the impact of process parameters on warpage curvature.The results show that the imbalance of stress in the rolling direction leads to a larger deformation of 6063 aluminum alloy plate than that of 7072 aluminum alloy plate to achieve stress equilibrium of dissimilar metals.The difference of stress in the rolling direction can be used to characterize the warping condition of 6063/7072 aluminum alloy liquid-cooled plates.The warping curvature of the liquid-cooled plate can be effectively reduced by increasing the rolling reduction rate,enlarging the temperature difference between the two types of mental during rolling,and reducing the thickness ratio of 6063 aluminum alloy plate in the composite plate.The forming accuracy of the liquid-cooled plate can be improved by these measures.The relative error between experimental and simulated warping curvature is less than 5.58%.It indicates the accuracy and reliability of the finite element model in this study.The 6063/7072 aluminum alloy composite plate was obtained by differential temperature rolling experiment,which s

关 键 词：6063/7072液冷板 液冷板成形 差温轧制 工艺参数 翘曲变形 

分 类 号：TG146.1[一般工业技术—材料科学与工程]