摘要
基于LS-DYNA R8.0有限元软件,建立了航天领域中运载火箭用膜片的基于集磁器的电磁冲裁成形工艺有限元模型,揭示了集磁器作用下电流、磁场、磁场力和板料应力状态等的变化规律,并优化了放电电压和坯料直径等工艺参数。结果表明:集磁器的应用使得断面质量得到优化,强化剪切变形;基于集磁器的电磁冲裁工艺中,板料呈撕裂式断裂模式;随放电电压增大,板料的变形剧烈程度增大,断口圆角带减小,落料件直径呈先减小后增大趋势;随坯料直径增大,板料的变形剧烈程度先增大后减小,断口圆角呈先减小后增大趋势,落料件直径呈先增大后减小趋势;放电电压和坯料直径优化值分别为12 kV和130 mm。
A finite element model of electromagnetic blanking forming processes with field shape was established based on LS-DYNA R8.0 software for diaphragms used in carrier rocket in aerospace field,and the variation rules of current,magnetic field,and sheet stress states under the field shape case were revealed.Furthermore,the processing parameters of the discharge voltage and the billet diameter were optimized.The results show that the section quality is optimized and the shear deformation is intensified with using the field shape.The sheets present a tearing fracture mode under the forming processes.With the increase of the discharge voltages,the deformation degree of the sheets increases,the fillet area of the fracture decreases and the diameter of the blanking part decreases firstly firstly increases.With the increase of the billet diameters,the deformation degree of the sheets increases firstly and then decreases,the fillet area of the fracture decreases firstly and then increases,and the diameter of the blanking part increases and then and then decreases.The optimum values of the discharges voltages and the billet diameters are as 12 kV and 130 mm respectively.
作者
徐佳辉
黄亮
李建军
洪秀冬
苏红亮
XU Jiahui;HUANG Liang;LI Jianjun;HONG Xiudong;SU Hongliang(School of Materials Science and Engineering,Huazhong University of Science and Technology,Wuhan,430074;State Key Laboratory of Materials Processing and Die & Mould Technology,Wuhan,430074)
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2020年第11期1368-1377,共10页
China Mechanical Engineering
基金
国家自然科学基金资助项目(51575206)
中国航天科技集团公司航天科技创新基金资助项目(CASC150704)
汽车车身先进设计制造国家重点实验室开放课题(31615006)
中央高校基本科研业务费专项资金资助项目(2016YXZD055)。
关键词
集磁器
电磁冲裁
1035铝合金
膜片
field shaper
electromagnetic blanking
1035 aluminum alloy
diaphragm
