铝合金球面件带芯模缩径旋压成形数值仿真  

Numerical simulation on necking-in spinning with mandrel for aluminum alloy spherical parts

作　　者：郁立 于忠奇[1] 甘甜 赵亦希[1] YU Li;YU Zhong-qi;GAN Tian;ZHAO Yi-xi(Shanghai Key Laboratory of Digital Manufacture for Thin-Walled Structures,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]上海交通大学上海市复杂薄板结构数字化制造重点实验室,上海200240

出　　处：《塑性工程学报》2022年第7期51-57,共7页Journal of Plasticity Engineering

基　　金：国家重点研发计划项目(2020YFA0711102);国家自然科学基金资助项目(51790175)。

摘　　要：基于ABAQUS软件建立了带芯模缩径旋压有限元模型,完成了采用铝合金筒坯通过缩颈旋压成形薄壁球面件的过程仿真,分析了带芯模缩径旋压球面件的壁厚和贴模度,并将仿真结果与试验值进行了对比。结果表明,基于壳单元的球面件缩径旋压仿真模型具有较好的可靠性。多道次缩径旋压仿真结果表明,相对于无芯模旋压成形,带芯模缩颈旋压的铝合金球面件减薄率更大,且随着道次数的增加,铝合金球面道次减薄率逐渐下降;同时,带芯模缩径旋压件的贴模度能得到保证,最后,通过多道次缩径旋压试验对模拟结果进行了验证。Based on the software ABAQUS, the finite element model of necking-in spinning with mandrel was developed, the simulation of the forming process of thin-walled spherical part by necking-in spinning with aluminum alloy tube blank was carried out, the wall thickness and shape-fitting of the nicking-in spinning parts with mandrel were analyzed, and the simulation results were compared with the test values. The results show that the necking-in spinning simulation model based on shell elements shows better reliability. The multi-pass necking-in spinning simulation results show that compared with the spinning without mandrel, the thinning rate of the aluminum alloy spherical parts by necking-in spinning with mandrel is greater, and the thinning rate in each pass of aluminum alloy spherical parts gradually decreases with the increase of pass number;meanwhile, the shape-fitting of necking-in spining parts with mandrel can be guaranteed. Finally, the simulation results were verified by the multi-pass necking-in spinning test.

关 键 词：缩径旋压 球面件 铝合金 数值仿真 成形精度 

分 类 号：TG306[金属学及工艺—金属压力加工]