薄壁筒减薄旋压成形的扩口现象研究

发布时间：2018-06-14 12:12

本文选题：核电装备 + 薄壁筒形件　；参考：《锻压技术》2016年12期

【摘要】：整体化成形高性能、高质量的屏蔽套是我国核电装备自主化制造急需解决的重大问题。通过有限元数值模拟的方法,针对薄壁筒旋压中的端部形变不稳定现象(扩口现象)的产生机理进行分析,研究壁厚及起旋位置对筒形件旋压中扩口高度的影响规律。分析结果表明,增加壁厚和使起旋位置远离端口时,扩口高度降低。提出了抑制端部扩径现象的工艺端口结构,并通过旋压成形实验进行验证。实验结果表明,增加合理的工艺端口结构可以有效抑制端部的扩径高度,提高旋压构件的整体刚度。
[Abstract]:Integrated shaping, high performance and high quality shielding sleeve is an urgent problem to be solved in the autonomic manufacturing of nuclear power equipment in China. By means of finite element numerical simulation, the mechanism of end deformation instability (flaring phenomenon) in the spinning of thin-walled cylinder is analyzed, and the influence of wall thickness and starting position on the height of flange in spinning is studied. The results show that the height of the flange decreases with increasing the wall thickness and keeping the starting position away from the port. The structure of the process port was proposed to suppress the end expansion, and was verified by the spinning forming experiment. The experimental results show that the expansion height of the end can be effectively restrained and the overall stiffness of the spinning member can be improved by increasing the reasonable structure of the process port.
【作者单位】：中南大学高性能复杂制造国家重点实验室;
【基金】：国家重点基础研究发展计划(973计划)(2014CB046601)
【分类号】：TM623;TG306

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