锻压技术

渐进冲击液压载荷下T型管的成形规律

英文标题：Forming laws of T-shaped tube under incremental impact hydraulic loads

单位：1.桂林电子科技大学机电工程学院 2.桂林电子科技大学机电综合工程训练国家级实验教学示范中心

分类号：TG394

出版年,卷(期):页码：2023,48(5):130-136

摘要：

为了进一步提高管坯的成形性能，改善传统液压胀形依赖高压源的问题，提出了一种多通管渐进冲击液压胀形方法。以T2紫铜T型管为研究对象，应用设计的胀形装置进行了冲击液压胀形实验研究，通过不同冲击液压载荷下1道次冲击液压胀形、2道次和3道次渐进冲击液压胀形结果的对比，分析了初始内压力、补料量、渐进道次对T型管支管高度、壁厚分布、支管顶部圆角半径的影响。研究结果表明：该方法可以成形出质量较好的T型管；初始内压力对T型管支管的顶部圆角和侧壁贴模性有较大的影响；各道次的初始内压力分别为10、30和32 MPa以及补料量分别为3、3和15 mm的3道次渐进冲击液压载荷下，T型管的成形质量最好。

In order to further improve the formability of tube blank and improve the problem of traditional hydraulic bulging technology relying on high pressure source, a incremental impact hydraulic bulging method for multi-pass tube was proposed. For T2 red copper T-shaped tube, the experimental research on incremental impact hydraulic bulging was carried out by the designed bulging device, and by comparing the results of one-pass impact hydraulic bulging, two-pass and three-pass incremental impact hydraulic bulging under different hydraulic loads, the influences of initial internal pressure, feeding amount and incremental pass on the height, wall thickness distribution and top fillet radius of branch tube for T-shaped tube were analyzed. The research results show that this method can form T-shaped tubes with good quality. The initial internal pressure has a great influence on the top fillet radius and side wall fitting of branch tube for T-shaped tube. The forming quality of T-shaped tube is the best under the three-pass incremental impact hydraulic loads with the initial internal pressure for each pass of 10, 30 and 32 MPa and the feeding amounts of 3, 3 and 15 mm, respectively.

基金项目：

国家自然科学基金资助项目(52265044);广西自然科学基金资助项目(2022GXNSFAA035586);广西高校中青年教师科研基础能力提升计划(2021KY0201)；桂林电子科技大学研究生教育创新计划项目(2023YCXS005)

作者简介：赵鑫牛（1997-），男，硕士研究生,E-mail：zhao_xinniu@163.com;通信作者：刘建伟（1978-），男，博士，教授,E-mail：liujianwei78988@163.com

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