多辊下压式拉形柔性浮动夹持数值模拟与实验

Numerical Simulation and Experiment of Flexible Floating Clamping in Multi-roll Stretch Forming Process

采用ANSYS/LS-DYNA对使用柔性浮动夹持方式的多辊下压式拉形过程进行了数值模拟,验证了柔性浮动夹持的效果,分析了所得成形件在拉形过程中的应力、应变分布。结果表明:柔性浮动夹持方式适用于多辊下压式拉形,能够实现柔性、浮动夹持的效果;使用柔性浮动夹持时所得成形件应力、应变分布均匀,成形效果较好。完成了相关实验验证,对数值模拟结果和实验结果进行了对比,结果表明:数值模拟结果与实验结果吻合较好。

The multi-roll stretch forming process of saddle-shaped surface parts with flexible floating clamping mode were simulated by ANSYS/LS - DYNA. The effect of flexible floating clamping mode was verified. The distribution of stress and strain of formed parts was analyzed. Results indicated that the flexible floating clamping mode was suitable for the process of the multi-roll stretch forming process. The stress and strain of the formed part distributed uniformly. Finally, the corresponding experiment was accomplished. When comparing the results of the numerical simulation and that of the experiment, it was concluded that the two types of results were nearly consistent.