摘要
基于高应变速率有利于提高铝合金成形极限和降低回弹量的原理,利用电磁成形工艺成形了航空5A02铝合金T型三通管(导管Φ50 mm×1 mm,三通Φ32 mm)。首先,利用高速拉伸机测试了5A02铝合金O态的动态力学行为,明确了应变速率对塑性的影响;其次,设计了翻边坯料的预制孔形状和尺寸;最后,设计了翻边电磁成形模具和芯轴,经过试验获得了T型三通管翻边电磁成形的最佳工艺参数,线圈由尺寸为Φ3 mm×7 mm的铜线绕制而成(共9匝),放电能量为20 k J,峰值电流为80 k A,频率为5.73 k Hz;通过对成形件的检测发现,贴模间隙均小于0.2 mm,减薄率小于14%。
Based on the principle that high strain rate is beneficial to increase the forming limit and decrease the spring back of aluminum alloy,the 5 A02 aluminum alloy T-shaped tube( tube size of Φ50 mm × 1 mm and branch size of Φ32 mm) was formed by electromagnetic flanging forming. Firstly,the dynamic mechanical behavior of 5 A02-O aluminum alloy was tested using tensile testing machine,and the effect of strain rate on plasticity was investigated. Secondly,the shape and size of the prefabricated hole of the flanged blank were designed. Finally,the mold and mandrel for electromagnetic flanging forming were designed and the optimum process parameters of the electromagnetic flanging forming of 5 A02 aluminum alloy T-shaped tube were obtained by tests. The coil was made of copper wire with the size of Φ3 mm × 7 mm,and it is 9 turns. The discharge energy is 20 kJ,the peak current is 80 kA and the frequency is 5. 73 kHz. The inspection of the formed part shows that the gap from mold is less than 0. 2 mm and the thinning rate is less than 14%.
作者
白雪山
尹延广
赵天章
BAI Xue-shan;YIN Yan-guang;ZHAO Tian-zhang(Shenyang Aircraft Corporation,Shenyang 110850,China;Key Laboratory of Fundamental Science for National Defense of Aeronautical Digital Manufacturing Process,Shenyang Aerospace University,Shenyang 110136,China)
出处
《塑性工程学报》
CAS
CSCD
北大核心
2021年第4期24-29,共6页
Journal of Plasticity Engineering
基金
国家自然科学基金资助项目(51605310)
中国博士后科学基金资助项目(2019M661123)。
关键词
5A02铝合金
电磁成形
T型三通管
翻边
5A02 aluminum alloy
electromagnetic forming
T-shaped tube
flanging
