摘要
针对油箱底壳零件在冲压成形过程中产生的起皱、破裂、成形不充分等缺陷,利用Dynaform软件对油箱底壳冲压过程进行数值模拟,分析拉延筋的设置对油箱底壳成形质量的影响。模拟结果表明,可以利用等效拉延筋确定其合理的工艺参数,采用分段拉延筋比采用均布拉延筋更符合零件的拉深成形要求;模拟优化后的分段半圆截面拉延筋高度和半径分别为筋一、筋三H=2 mm,R=3 mm,筋二、筋四H=5 mm,R=3 mm;确定了真实拉延筋模拟更能反应零件的成形状态。之后采用真实分段拉延筋进行拉深成形试模。结果表明,工件成形效果良好,修边区域内无褶皱、破裂等成形缺陷,零件最大减薄率为20.3%。
For the defects of wrinkling, rupture and the inadequate forming in the drawing process of oil pan, the drawing process of oil pan was numerical simulated by Dynaform software, and the influence of drawbead setting on the quality of oil pan drawing was discussed. The simulation results show that the reasonable process parameters can be gained by equivalent drawbead. The segmented drawbead is more conformed to the requirements of the drawing than equispaced drawbead. The height and radius of the optimized segmented semicir- cle drawbead were H = 2 mm, R = 3 mm for drawbead 1 and drawbead 3 respectivly, H = 5 mm, R = 3 mm for drawbead 2 and drawbead 4. The real simulation of drawbeads that better reflecting the state of the drawing parts is determined. Then, the real segmented drawbead drawing was adopted in the test. The results show that the forming effect of the part is good without drawing defects of folds or rupture in the trimming area, and the maximum thinning rate of parts is 20. 3%.
出处
《锻压技术》
CAS
CSCD
北大核心
2014年第12期31-34,38,共5页
Forging & Stamping Technology
基金
吉林省教育厅"十二五"科学技术研究项目(吉教科合字[2011]第89号)
