汽车驱动桥壳液压胀形数值模拟及试验研究  

Numerical simulation and experimental research on hydro-bulging of automobile drive axle housing

作　　者：薛克敏[1] 孙大智[1] 李萍[1] 

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》2017年第3期36-42,共7页Journal of Plasticity Engineering

基　　金：安徽省科技攻关计划项目(2011AKKG1117);安徽省科技厅秋实计划资助项目(JZ2015QSJH0218)

摘　　要：利用ABAQUS软件建立桥壳液压胀形工艺的有限元模型,对汽车桥壳的预胀形和终胀形过程进行了数值模拟,并分析了不同的加载路径对桥壳成形的影响规律。模拟结果表明:预胀形阶段,胀形压力保持30 MPa不变,管坯发生轻度失稳形成三鼓形样件,合模后胀形压力增大至60 MPa,内凹部分贴模得到较好壁厚分布的预胀形管坯;终胀形初期,胀形压力保持20 MPa不变,轴向进给量达到30 mm后快速增大至120 MPa,可以成形出合格的样件。采用Q345B无缝钢管进行物理实验,获得了符合尺寸要求的桥壳样件,验证了数值模拟的可靠性。The FE model of the hydro-bulging axle housing was established by using ABAQUS software. The impact of variable loading paths of pre-bulging and final bulging on the forming of the axle housing was analyzed by the numerical simulation. Simulation results show that three drum sample is formed for the mild instability of pre-bulging axle housing tube with the bulging pressure maintaining 30 MPa un- changed, after closing mold, the bulging pressure increases to 60 MPa, and pre-bulging tube with better wall thickness distribution is ob- tained when the inner concave part attaches the mold. In the beginning of the firm[ bulging, the bulging pressure of 20 MPa keeps un- changed, when the axial feeding reaches 30 mm, the bulging pressure increases quickly to 120 MPa, and then the qualified bulging sam- pie is obtained. The forming process was tested by using seamless Q345B steel tube, and the axle housing samples with fitting dimension were obtained which verified the reliability of numerical simulation.

关 键 词：汽车桥壳 液压胀形 数值模拟 加载路径 壁厚分布 

分 类 号：TG394[金属学及工艺—金属压力加工]