孙颖迪
,
陈秋荣
材料工程
doi:10.11868/j.issn.1001-4381.2015.000635
运用基于AZ31镁合金本构方程与ALE算法的HyperXtrude软件对典型AZ31薄壁管材的挤压过程进行数值模拟,并通过调整焊合室高度、焊合室大圆角及焊合室坡度3个结构参数,分析不同条件下应力分布与速率分布的变化情况.结果表明:焊合室内近工作带处压力随焊合室高度增加不断减小,分流孔与焊合室压力的最大值与平均值均随焊合室大圆角增大发生降低,分流孔与焊合室压力随焊合室入口坡度增大不断增大,并在焊合室高度为16mm、大圆角为18mm以及入口坡度为15°时金属流速均方差达到最小值.优化模具结构缓解了应力集中与流速不均等问题,在实验生产中得到合格产品,型材组织均匀细化.
关键词:
AZ31镁合金
,
挤压模具
,
有限元分析
,
数值模拟
W.Q. Ma
,
H.Y. Sun
,
D.C. Kang
,
K.D. Zhao
金属学报(英文版)
The steel reinforced plastic pipe is a new kind of pressure pipe. It is made up with steel
wires and plastic. Because reinforced skeleton of the steel wire increase the complexity
of plastic flow during the extrusion phase, the traditional design criteria of extrusion
die is not suitable. The study on extrusion die of the kind of pipe is very important
step in produce development. Using finite element (FE) method in this paper, the
flow rule of molten plastic inside the die has been predicted and a group of optimal
structural parameters was obtained. These results are helpful for reducing the design
cycle and improve the quality of the final product.
关键词:
steel reinforced plastic pipe
,
null
,
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