为研究正反向超塑胀形工艺对厚度分布的影响,应用商业有限元软件MARC对带有凹槽的深盒形7475合金零件正反向超塑胀形过程进行了有限元模拟,并对不同工艺条件下成形后零件的壁厚分布结果进行了分析.研究表明:正反向超塑胀形工艺是控制成形零件壁厚的有效途径,通过优化压力-时间曲线和反向胀形模具形状,明显改善了零件的厚度分布,达到了零件的设计要求;后处理直观地显示了该零件正反向超塑胀形的全过程,为成形提供了合理的方案;零件变形各阶段的应变速率控制在7475合金的应变速率范围内,证明压力-时间曲线设计合理.
参考文献
| [1] | HuangA;LOWE A;CARDEWHALL M J .Experimental validation of sheet thickness optimization for superplastic forming of engineering structures[J].Journal of Materials Processing Technology,2001,112:136-143. |
| [2] | LeeS .Thicknessdistributioninasuperplasticallyformedrectangularpanunderplane-strainconditions[J].Journal of Materials Processing Technology,1997,65:59-64. |
| [3] | 张凌云.改善超塑性气压胀形零件壁厚分布的工艺方法[J].金属成形工艺,2002(04):40-42. |
| [4] | K.S.Lee;H.Huh .Numerical simulation of the superplastic moving die forming process with a modified membrane finite element method[J].Journal of Materials Processing Technology,2001(1/3):754-760. |
| [5] | Young-Seon Lee;Sang-Yong Lee;Jung-Hwan Lee .A study on the process to control the cavity and the thickness distribution of superplastically formed parts[J].Journal of Materials Processing Technology,2001(1):114-120. |
| [6] | XINGHL;ZHANG K F;WANG Z R .Study on optimal mode of superplastic deformation[J].Journal of Materials Processing Technology,1994,44:29-34. |
| [7] | ZHANGKF;WANG Z R;LAI X M et al.Designinsuperplasticformingprocessbyrigidvisco-plasticshellFEM[J].Materials Science Forum,1997,243:735-738. |
| [8] | 刁法玺,张凯锋.板料V形弯曲回弹的动力显式有限元分析[J].材料科学与工艺,2002(02):170-174. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%