锻压技术

Y形管内高压成形过程数值模拟与实验研究

英文标题：Numerical simulation and experimental study on hydroforming process for Y-shaped tube

作者：冯莹莹孙晓倩贾越骆宗安吴庆林

单位：东北大学

分类号：TG394

出版年,卷(期):页码：2023,48(5):236-244

摘要：

为解决Y形管在内高压成形过程中极易出现的起皱、胀破等缺陷，采用与主管相平行的背向冲头，结合DYNAFORM模拟软件以探究背向冲头端面角度对成形效果的影响。并对使用平行冲头时，内压力、补料比等主要影响因素对Y形管的成形性能、壁厚分布及应力应变分布的影响开展研究，分析不同影响因素的相关影响机理，以寻求制备最佳性能的Y形管的工艺参数范围。结果表明：整形应力为55 MPa、补料比为1.3∶1时，Y形管的成形效果最佳，且采用平行冲头可明显提高支管的有效成形高度，减少支管顶端胀破的机率，使Y形管壁厚分布更为均匀，成形效果更为优异。

In order to solve the defects such as wrinkle and bursting etc. that were prone to occur during the hydroforming process of Y-shaped tube, a back punch parallel to main tube was designed, and the influence of the end angle of back punch on the forming effect was explored by simulation software DYNAFORM. Furthermore, when parallel punch was used, the influences of internal pressure, feed ratio and other main influence factors on the formability, wall thickness distribution and stress-strain distribution of Y-shaped tube were studied, and the relevant influence mechanism of different influence factors was analyzed to seek the range of process parameters for preparing Y-shaped tube with the best performance. The results show that when the shaping stress is 55 MPa and the feed ratio is 1.3∶1, the forming effect of Y-shaped tube is the best, and the parallel punch can obviously increase the effective forming height of branch tube, reduce the probability of branch tip bursting, and make the wall thickness distribution of Y-shaped tube more uniform and the forming effect better.

基金项目：

国家自然科学基金资助项目(52105322)

作者简介：冯莹莹（1982-），女，博士，副研究员,E-mail：fengyy@ral.neu.edu.cn

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