基于液压胀形的直焊缝管力学性能测试方法  

The Determination of Mechanical Properties of Seamed Tube with Hydraulic Bulge Test

作　　者：许长宝[1] 赵亦希[1] 陈新平[2] 陈庆欣[2] 徐祥合[1] 王武荣[3] 

机构地区：[1]上海交通大学上海市数字化汽车车身重点实验室,上海200240 [2]宝山钢铁股份有限公司研发中心,上海201900 [3]上海大学材料科学与工程学院,上海200072

出　　处：《机械设计与研究》2010年第3期97-100,共4页Machine Design And Research

基　　金：国家863计划资助项目(2007AA04Z145)

摘　　要：直缝焊管是液压胀形工艺的主要原材料,在管件液压胀形数值模拟和工艺设计中,通常使用相应板材力学性能作为焊管的力学性能,而在焊管的加工过程中,材料性能发生变化,这使得用板材性能来指导液压胀形工艺设计的可靠性大大降低,如何准确评价焊管力学性能变得越来越突出。结合理论分析和自由胀形实验,得到母材力学性能参数测试方法;由于焊接区(焊缝以及热影响区)受力状态复杂,其受力状态不能由管材形状参数和内压力来确定,采用单向拉伸试验和混合准则法,确定焊缝以及热影响区材料的力学性能参数。上述测试结果应用于方形零件液压胀形数值仿真,仿真结果与实验结果比较表明该力学性能参数测试方法是准确可靠的。The accuracy and appropriateness of plate properties for seamed tube hydroforming analysis and process design is questionable due to the fact that the properties are changed obviously during the seamed tube forming process. Thus a testing method that would give properties of seamed tubes accurately is necessary. The theoretical calculation and experimental measurement of base material mechanical properties is the main concern of this paper. The mechani- cal properties of welded zoon（ including welded line and heat affected zoon）, which would not measured by hydraulic bulge test due to the complex stress condition, is determined by uniaxial tension test and methed of mixture rule. At last, a numerical model of squared component is established by using the measured material mechanical properties. Good correlation between the simulation result and experiment data is indicated, and the accuracy of this measurement method is prared.

关 键 词：液压胀形 直缝焊管 力学性能 试验测试方法 

分 类 号：TG394[金属学及工艺—金属压力加工]