论文部分内容阅读
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 finite element model of the hydraulic expansion of the axle housing was established by ABAQUS software. The pre-expansion and final expansion of the axle housing were numerically simulated. The influence of different loading paths on the axle housing was analyzed. The simulation results show that the pre-bulging stage, the bulging pressure remains unchanged at 30 MPa, mild instability of the tube blank to form a three-drum sample, the bulging pressure increases to 60 MPa after the mold clamping, Good wall thickness distribution of pre-bulging tube; the initial expansion of the initial shape, the bulging pressure remains unchanged 20 MPa, axial feed to 30 mm quickly increased to 120 MPa, can form a qualified sample. The Q345B seamless steel tube was used to conduct the physical experiment, and the bridge shell sample with the required size was obtained. The reliability of the numerical simulation was verified.