5A02铝合金磁脉冲胀形试验与模拟研究  

Experiment and simulation of magnetic pulse bulge forming for Al alloy 5A02

作　　者：韩玉杰[1] 侯红亮[1] 于海平[2] 牛涛[1] 

机构地区：[1]北京航空制造工程研究所,北京100024 [2]哈尔滨工业大学材料科学与工程学院,黑龙江哈尔滨150001

出　　处：《锻压技术》2015年第4期33-39,共7页Forging & Stamping Technology

基　　金：国家重点基础研究发展计划(2011CB012803)

摘　　要：磁脉冲板材成形属于高速率变形，应变速率可达到100～1000s^-1，因此导致变形过程的大量参数信息无法准确获取，给磁脉冲变形过程的研究与分析带来了较大的困难。采用数值模拟和工艺试验相结合的方法，对5A02铝合金磁脉冲胀形过程进行了研究，分析了不同放电电压条件下板材的磁场分布以及运动过程。结果表明，胀形首先在电磁力最大区域先发生变形，随后带动其他区域变形，板材的变形速度在0．2m·s^-1时达到最大，其中间区域测得速度最大可达116m·s^-1，胀形在0．6ms达到最大值，而后由于回弹其胀形高度有小幅下降。Magnetic pulse forming for sheet metal is a high velocity forming technology with the strain rate of 100 - 1000 s^-1. Thus, a large number of parameters during deformation process can not be obtained, which brings huge difficulties for the analysis of the magnetic pulse deformation process. The magnetic pulse forming process of Al alloy 5A02 was researched by combining numerical simulation with process experiments, and the movement processes and magnetic field distributions of the sheets under different discharge voltages were an- alyzed. The results show that bulge forming occurs firstly at the region with the maximum magnetic pressure, and then other regions deform accordingly. The deformation velocity of the sheet reaches the maximum at 0. 2 m ·s^-1. The maximum velocity in the centre is 116 m · ^-1 and the bugling peaks at 0. 6 ms. After that, the bugling height decreases slightly due to springback.

关 键 词：磁脉冲成形 胀形 5A02铝合金 数值模拟 变形速度 

分 类 号：TG391[金属学及工艺—金属压力加工]