曲面件柔性拉伸成形时的过渡区

发布时间：2018-07-10 14:39

本文选题：塑性加工 + 板料成形　；参考：《东北大学学报(自然科学版)》2015年10期

【摘要】：利用多夹钳式拉伸成形机能够实现夹持和拉伸成形的柔性化特点,对投影面为梯形的曲面件分别建立矩形板料和梯形板料夹持有限元模型,并进行了不同过渡区的矩形板料和梯形板料的数值模拟.结果表明,随着过渡区最大长度的减小,板料容易贴模,成形力减小,成形件的最大应变值减小,有效成形区应变、厚度分布更均匀,成形效果更好.对投影面为梯形的曲面件进行拉伸成形实验,实验结果与数值模拟结果吻合,验证了数值模拟的正确性.多夹钳式拉伸成形机能够根据模具形状合理设计过渡区形状,提高成形质量,节省材料,降低拉伸成形成本.
[Abstract]:The flexible characteristics of clamping and drawing can be realized by using multi-clamp drawing forming machine. The finite element models of rectangular sheet and trapezoid sheet clamping are established for curved surface with trapezoidal projection plane. The numerical simulation of rectangular sheet and trapezoidal sheet in different transition regions was carried out. The results show that with the decrease of the maximum length of the transition zone, the sheet metal is easy to paste, the forming force decreases, the maximum strain value of the forming part decreases, the strain in the effective forming zone is more uniform, the thickness distribution is more uniform, and the forming effect is better. The experimental results of tensile forming of a curved surface with a trapezoid projecting surface are in good agreement with the numerical simulation results, and the correctness of the numerical simulation is verified. The multi-clamp drawing machine can reasonably design the transition zone shape according to the die shape, improve the forming quality, save the material and reduce the drawing cost.
【作者单位】：吉林大学无模成形技术开发中心;东北电力大学工程训练中心;
【基金】：欧盟第七框架协议计划国际合作项目(FlexiTool-CT-2010-261925)
【分类号】：TG386

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