锻压技术

不同高宽比对铝合金桥形件成形性的影响

英文标题：Influences of different aspect ratios on formability of aluminum alloy bridge-shaped parts

作者：周小京李国俊张治民吴莹

关键词：挤压桥形件铝合金金属流动高宽比

分类号：TG379

出版年,卷(期):页码：2016,41(11):9-14

摘要：

为揭示桥形件成形时的塑性流动规律，利用三维有限元模拟软件对不同高宽比条件下的成形过程进行了仿真模拟和对比分析，并确定了初步的挤压成形工艺方案。研究结果表明：在该锻件的变形过程中，当凸模压下量S分别为10.71、21.41和28.90 mm时，S=21.41 mm时的等效应变分布、等效应力分布皆较为均匀，此时，窄桥宽度W=20 mm、高宽比H/W=3.15的桥形件的等效应变差值最小，等效应力最大值最低。应用本文模拟和试验的成形工艺参数和方案，可一次成形得到尺寸和性能皆符合产品要求的桥形锻件。

To reveal the plastic flow laws of the bridge-shaped parts during the deformation, the forming processes with different aspect ratios were investigated and comparatively analyzed by finite element simulation software, and its initial extrusion forming process was determined. The results show that during deformation of the forging, when the punch stroke is 10.71, 21.41 and 28.90 mm respectively, equivalent strain and equivalent stress are more evenly distributed under S=21.41 mm. When S is 21.41 mm, the difference of equivalent strain is the smallest and the maximum value of equivalent stress is the lowest with the width of bridge-shaped piece W=20 mm and aspect ratio H/W=3.15. With the simulation and test results of forming process parameters and projects, a bridge-shaped forging that meets the requirements of the product can be obtained.

基金项目：

国防基础科研项目(JSJC2013204B403)

周小京 (1991-) ，男，硕士研究生李国俊 (1969-) ，男，硕士，研究员级高级工程师

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