Research on wrinkling behavior after the first discharge in electromagnetic incremental forming process of large aluminum alloy curved surface parts(PDF)
MATERIALS CHINA[ISSN:1674-3962/CN:61-1473/TG]
Issue:
2016年第4期
Page:
16-20
Research Field:
特約研究論文
Publishing date:
Info
Title:
Research on wrinkling behavior after the first discharge in electromagnetic incremental forming process of large aluminum alloy curved surface parts
(1.State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology (2.Wuhan National High Magnetic Field Center, Huazhong University of Science and Technology
Keywords:
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CLC:
PACS:
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DOI:
10.7502/j.issn.1674-3962.2016.04.06
DocumentCode:
Abstract:
The whole blank holder and segment blank holder were used to study the wrinkling behaviors and rules after the first discharge forming in electromagnetic incremental forming process of large aluminum alloy curved surface parts. The effect of blank-holder force on wrinkling behavior and plastic flow after the first discharge forming in electromagnetic incremental forming process was reveled. The results of numerical simulation showed that the flange zone and floating sidewall zone are easily to wrinkle, which is in good agreement with the experimental results. Under the condition of whole blank holder, the values of blank-holder force in critical flange wrinkle condition and floating sidewall wrinkle condition are 8.4kN and 21.6kN. Under the condition of segment blank holder, the values of blank-holder force on the segment nearest plastically deforming area in critical flange wrinkle condition is 8.4kN, and the values of blank-holder force on two symmetrical segments nearest floating sidewall in floating sidewall wrinkle condition is 23.8kN. Compared with the whole blank holder, the material flow behavior can be greatly improved by means of segment blank holder.