锻压技术

汽车铝合金管的中部法兰镦压成形极限

英文标题：Forming limit of middle flange upsetting and pressing for automotive aluminum alloy pipe

作者：张晏晴1 程志远2 吕海峰3

单位：(1.晋西车轴股份有限公司山西太原 030051 2.阔丹凌云汽车胶管有限公司河北涿州 072750 3.中北大学机械工程学院山西太原 030051)

关键词：法兰镦压成形扩径缩颈管材成形

分类号：TG386.1

出版年,卷(期):页码：2024,49(12):82-89

摘要：

为改善管坯在镦压大面积法兰的过程中极易出现的失稳变形等缺陷，从而达到提高生产效率的目的，首先，对汽车铝合金管路的中部法兰镦压成形过程进行理论分析，得到了影响法兰成形极限的关键因素;然后，通过Deform-2D/3D软件对管路直径、壁厚和模具速度对成形极限的影响进行分析，得到镦压自由端高度与管路直径、壁厚和模具速度的关系曲线；最后，在此基础上提出一种扩径-缩径-镦压的复合成形工艺，并在EF30-4管路末端加工机床上搭建了工作平台，进行了法兰的试制生产。实验结果表明，该工艺可提升成形极限、增大法兰成形面积，为法兰管路设计提供参考。

Abstract: In order to improve the defects such as instability and deformation that were prone to occur during the upsetting and pressing process of large-area flanges in aluminum alloy pipe blanks, and thus achieve the goal of increasing production efficiency, firstly, the upsetting and pressing process of the middle flanges for automotive aluminum alloy pipelines was analyzed theoretically, and the key factors affecting the forming limit of the flange were obtained. Then, the influences of pipe diameter, wall thickness and mold speed on the forming limit were analyzed by Deform-2D/3D software, and the relationship curves of the free end height of upsetting and pressing with the pipe diameter, wall thickness and mold speed were obtained. Finally, based on this, a composite forming process of expanding diameter-necking-upsetting and pressing of flanges was proposed, and a working platform was established on the EF30-4 pipe end processing machine for the trial production of flanges. The results show that this process can enhance the forming limit and increase the flange forming area, which provides the reference for the future flange pipeline design.

基金项目：

基金项目:国家自然科学基金资助项目（51305409）

作者简介：张晏晴（1998-），男，硕士研究生 E-mail：1134657603@qq.com 通信作者：吕海峰(1981-), 男, 博士，副教授 E-mail：lvhaifeng@nuc.edu.cn

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