锻压技术

管翅式散热器液压胀接回弹行为的研究

英文标题：Study on springback behavior for tube-fin radiator hydroforming

单位：1.桂林电子科技大学机电工程学院 2.桂林电子科技大学广西制造系统与先进制造技术重点实验室

分类号：TG394

出版年,卷(期):页码：2023,48(5):147-154

摘要：

回弹对管翅式散热器液压胀接的成形质量有重要影响。采用材料幂强化理论模型，分析了换热管发生塑性变形、翅片发生弹性变形时管翅式散热器液压胀接卸载阶段的回弹行为，并利用ABAQUS有限元仿真软件建立了管翅式散热器液压胀接的有限元模型，提出了胀接液压力选取范围的确定方法以及换热管与翅片无约束回弹差值的获得方法，分析了胀接液压力对管翅式散热器卸载后的整体回弹量和回弹差值的影响规律，初步探索了整体回弹量对残余接触压力的影响规律。结果表明：基于材料幂强化本构关系的回弹模型能够直观地反映回弹对残余接触压力的影响；胀接液压力选取范围的确定方法是准确的，与理论结果相符；胀接时应在胀接液压力选取范围内增加胀接液压力以增加回弹量，从而增加残余接触压力，改善成形质量。

The springback has an important influence on the forming quality of tube-fin radiator hydroforming. Therefore, the springback behavior of tube-fin radiator during the unloading stage of hydroforming when the radiator tube has plastic deformation and the fin has elastic deformation was analyzed by using the material power strengthening theory model, and the finite element model of the tube-fin radiator hydroforming was established by finite element software ABAQUS. Furthermore, the determination method of selecting the hydroforming pressure range and the method of obtaining the unconstrained springback difference between radiator tube and fin were proposed, and the influence laws of the hydroforming pressure on the overall springback amount and the springback difference of tube-fin radiator after unloading were analyzed. Finally, the influence law of the overall springback on the residual contact pressure was preliminarily explored. The results show that the springback model based on the material power strengthening constitutive relation can directly reflect the effect of springback on the residual contact pressure. The determination method for selecting the hydroforming pressure range is accurate and consistent with the theoretical results. Thus, during hydroforming, the hydroforming pressure should be increased within the hydroforming pressure range to increase the springback amount, and the residual contact pressure is increased to improve the forming quality.

基金项目：

国家自然科学基金资助项目（52065014）；广西自然科学基金资助项目（2017GXNSFAA198133）；广西制造系统与先进制造技术重点实验室主任基金项目（22-35-4-S013）；广西高校中青年教师科研基础能力提升项目（2023KY0220）

作者简介：陈凯（1997-），男，硕士研究生,E-mail：chenkai1997430725@163.com;通信作者：何玉林（1980-），女，硕士，高级实验师,E-mail：hyl_2005@126.com

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