摘要
通过刚性拉深和充液拉深对比试验,研究LF21(3A21)铝合金材料的拉伸极限,解决深盒型零件成形困难的问题。对LF21(3A21)铝合金材料的力学性能及成形工艺进行分析,基于有限元分析,使用试验设备对板料进行拉深试验,使用有限元分析并计算得到LF21铝合金薄壁板的成形极限云图和板料减薄云图,通过所得云图和计算结果以及进一步实践验证得出两者之间的误差,同时进行刚性拉深对比试验,为最后计算零件的拉深比提供了依据,为航空航天飞行器的轻量化研究提供了可靠的技术支持和保证。最后得出厚度为1.8 mm的LF21铝合金材料的充液拉深一次成形的极限拉深比为3.32,为该材料拉深零件的成形方案提供了技术参考。
The tensile limit of LF21(3 A21) aluminum alloy material was studied by the comparative test of rigid deep drawing and hydrodynamic deep drawing, and the problem of difficulty in forming deep box-shaped parts was solved. Then, the mechanical properties and forming process of LF21(3 A21) aluminum alloy material were analyzed, and based on the finite element analysis, the drawing experiments were carried out on sheet metal by the experimental equipment. Furthermore, the forming limit diagram(FLC) and sheet metal thinning nephogram of LF21 aluminum alloy thin-walled sheet were obtained by finite element analysis and calculation, and the error of the two was obtained through the obtained nephogram, calculation results and further practical verification. At the same time, the rigid drawing comparison test was conducted, which provided a basis for the final calculation of the drawing ratio of part, which provides reliable technical support and guarantee for the lightweight research of aerospace vehicles. Finally, the limit drawing ratio of a single process of hydrodynamic deep drawing for LF21 aluminum alloy with the thickness of 1.8 mm is 3.32, which provides technical reference for the forming scheme of deep drawing parts of the material.
作者
崔丽
张帅
赵文华
杜建宁
荣旭辉
袁健富
张建民
郎利辉
Cui Li;Zhang Shuai;Zhao Wenhua;Du Jianning;Rong Xuhui;Yuan Jianfu;Zhang Jianmin;Lang Lihui(Shenyang Aircraft Corporation,Shenyang 110034,China;Tianjin Tianforging Aviation Technology Co.,Ltd.,Tianjin 300142,China;School of Mechanical Engineering and Automation,Beijiang University,Beijing 100191,China)
出处
《锻压技术》
CAS
CSCD
北大核心
2021年第11期160-167,共8页
Forging & Stamping Technology
关键词
充液拉深
极限拉深比
成形极限
LF21铝合金
有限元分析
hydrodynamic deep drawing
limit drawing ratio
forming limit
LF21 aluminum alloy
finite element analysis
