连续挤压前期变形规律的数值模拟

Numerical Simulation on Deformation Law of Metal in Initial Continuous Extrusion Forming

采用DEFORM-3D软件建立连续挤压模型,通过数值模拟分析连续挤压不同变形阶段的变形规律。结果表明,连续挤压变形过程中,坯料在挤压通道内的填充分布不均匀,靠近槽封块一侧填充较满,靠挤压轮一侧填充较差,这种差别在靠近堵头位置处更为明显。坯料流入定径带后不再发生塑性变形,从定径带流出的金属等效应变呈层状分布。

The simulation model of continuous extrusion forming was performed by DEFORM-3D software,and the deformation regular at different deformation stages were analyzed by numerical simulation.The results show that the metal filling in extrusion channel is inhomogeneous.Specially,the difference of metal filling in different parts of the channel is apparent near block.The equivalent strain of metal inflowing from sizing zone exhibits laminar distribution.