铝合金变径型涡旋体零件流动控制成形分流线分布  

Distribution of split flow line of flow control for aluminum alloy scroll body with variable diameter

作　　者：薛世博 陈安 崔北顺 曹洪 纪小虎[1] 石文超[1] XUE Shi-bo;CHEN An;CUI Bei-shun;CAO Hong;JI Xiao-hu;SHI Wen-chao(School of Materials Science and Engineering,Hefei University of Technology,Hefei 230009,China)

机构地区：[1]合肥工业大学材料科学与工程学院,安徽合肥230009

出　　处：《塑性工程学报》2023年第4期89-95,共7页Journal of Plasticity Engineering

基　　金：安徽省重点研发与开发计划(1804b06020369);中央高校基本科研业务费专项资金资助项目(JZ2021HGQB0273)。

摘　　要：为了研究铝合金变径型涡旋体零的件筒壁区对变径涡旋体区金属流动及微观组织和力学性能的影响规律,以涡旋体区高宽比最小为3.9的含筒壁区和未含筒壁区的静盘和动盘为研究对象,利用Deform-3D软件进行流动控制成形过程有限元模拟并开展物理实验验证,分析了筒壁区对金属流动分流线分布的影响,研究了分流线周围的应变和应力分布及特征区的微观组织和力学性能。结果表明,未含筒壁区的动盘相邻筋中间分布分流线。由于筒壁区存在,凸模行程为0%~80%时,含筒壁区的静盘相邻筋中间未出现多条分流线。凸模行程大于80%时,含筒壁区的静盘与涡旋体间腹板金属开始充填涡旋体型腔并出现分流线,且分流线偏向于涡旋体型腔侧。靠近分流线侧涡旋体圆角处金属流线分布紧密,等效应力、等效应变和温升值最大。To study the effect laws of the cylinder wall region on the metal flow,microstructure and mechanical properties of aluminum alloy scroll body with variable diameter,taking the static and moving disks in the scroll region with and without cylinder wall region with the minimum aspect ratio of 3.9 as the research objects,the finite element simulation of flow control forming process was carried out by Deform-3D software and verified by physical experiments.The influence of cylinder wall region on the distribution of metal split flow lines was analyzed.The distribution of strain and stress around the split flow lines,as well as the microstructure and mechanical properties of characteristic regions were studied.The results show that split flow lines are distributed in the middle of ribs of moving disks without the cylinder wall region.Due to the presence of cylinder wall region,when the travel of die is 0%-80%,there are no multiple split flow lines in the middle of ribs of static disks with cylinder wall region.When the travel of die is more than 80%,the metal in the web between the static disks with cylinder wall region and the scroll body begins to fill the scroll body cavity and the split flow lines appear.The split flow lines are biased to the scroll body cavity side.The metal flow lines are closely distributed in the corner of the scroll body near the split flow line,and the equivalent stress,equivalent strain and temperature appreciation are the largest.

关 键 词：壳体类件 分流线 流动均匀性 金属流线 数值模拟 

分 类 号：TG376.2[金属学及工艺—金属压力加工]