高强度铝合金板材的温热介质充液成形研究  

Investigation on warm/hot hydro-forming of high strength aluminum alloy sheet

作　　者：刘合军[1] 郎利辉[1] 李涛[1] 张志[1] 赵香妮[1] 

机构地区：[1]北京航空航天大学机械工程及自动化学院,北京100191

出　　处：《塑性工程学报》2009年第1期31-36,共6页Journal of Plasticity Engineering

基　　金：国家自然科学基金资助项目(10577001)

摘　　要：在温度20℃～300℃的范围内,对厚度1.2mm的7B04-T6高强度铝合金薄板在应变速率分别为0.0006s-1、0.006s-1和0.06s-1的条件下进行了单拉试验,并在此基础上利用MSC.Marc有限元软件进行了筒形件温热介质充液成形的差温热力耦合数值模拟,研究了成形温度、冲压速度和液室压力对于成形性能的影响。结果表明,在冲压速度15mm/min以及液室压力1MPa的情况下,零件的最大成形高度由常温下的20.5mm提高到了300℃时的31.6mm。The uniaxial tensile tests of high strength aluminum alloy sheet 7B04-T6 with a thickness of 1.2mm were performed at various temperatures ranging from 20℃ -300℃ and at different strain rates of 0. 0006s^-1 , 0. 006s^-1 and 0.06s^-1 respectively in this study. Based on the test results, a coupled thermo-mechanical finite element （FE） model for warm hydro-mechanical deep drawing was built up by using MS（2. Marc general software. The effects of process parameters regarding to the forming temperature, punch speed and hydraulic pressure on sheet formability was investigated by using the differential warm/hot forming FE simulation. It was found that： the maximum part depth was improved from 20. 5mm at room temperature to 31. 6mm at 300℃ by setting the punch speed at 15mm/min and the hydraulic pressure at 1MPa.

关 键 词：高强度铝合金 温热单拉 温热介质充液成形 热力耦合 有限元模拟 

分 类 号：TG386.41[金属学及工艺—金属压力加工] V261.28[航空宇航科学与技术—航空宇航制造工程]