双层板激光焊接/ 超塑成形数值模拟及工艺研究
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南京航空航天大学机电学院

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Numerical Simulation and Laser Welding/ SuperplasticForming Process Research of Core Sheets
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    摘要:

    选取TC4 钛合金四层板加强结构中双层板为研究对象,采用激光穿透焊接工艺代替传统超塑成
    形/ 扩散连接(SPF/ DB)工艺中涂止焊剂连接。借助ABAQUS 有限元分析软件对超塑成形过程进行分析,得到
    优化的压力-时间(p-t)曲线,作为双层板超塑成形过程的气压加载曲线,进行实验验证。结果表明:成形后零
    件壁厚分布均匀,焊缝处无撕裂现象,与有限元模拟结果保持一致;用此新工艺代替传统SPF/ DB 工艺中的止
    焊剂具有可行性。

    Abstract:

    Two鄄layer core sheets of TC4 titanium alloy four鄄sheet strengthened structure were researched. The
    sheets were welded by laser penetration welding instead of traditional superplastic forming/ diffusion bonding ( SPF/
    DB) process coated with check flux. The superplastic forming of the core sheets were simulated by ABAQUS finite el鄄
    ement analysis(FEM). Optimized pressure鄄time (p鄄t) curve was obtained. The p鄄t curve was used as the pneumatic
    loading curve of this process,then use superplastic forming test to verify it. It reveals that the FEM results consist with
    the experimental results, the thickness distribution is homogeneous,no weld tear phenomenon occurred. So the pro鄄
    posed process is feasible.

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徐萌萌.双层板激光焊接/ 超塑成形数值模拟及工艺研究[J].宇航材料工艺,2013,43(5).

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  • 在线发布日期: 2016-11-28
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