高强度钢短立边长行程直翻边成形过程材料回弹规律研究

发布时间：2018-05-01 07:34

本文选题：高强度钢 + Yoshida-Uemori　；参考：《塑性工程学报》2016年04期

【摘要】：汽车座椅滑轨工作面宽度小,长度长,承载大,是汽车座椅中的重要安全件。滑轨翻边成形时,材料卸载后发生弹性回弹,导致成形精度下降。因此,采用仿真和实验相结合的方式研究高强度钢短立边长行程滑轨类零件直翻边成形过程中的材料回弹规律。基于Yoshida-Uemori本构模型,采用有限元仿真技术,研究了短立边长程直翻边成形过程中的回弹规律。对材料DP780、屈服强度880MPa、厚度1.6mm的板料进行了翻边实验。研究发现,板料回弹呈现三维特征,因此,提出了考虑板料横截面内回弹角度、最大偏差距离和纵向起伏量的材料回弹综合系数。此外,随翻边高度减小,材料回弹角度非线性增大;随板料纵向长度增加,成形面纵向起伏量大幅上升。
[Abstract]:The sliding rail working face of the car seat is small in width, long in length and large in load. It is an important safety part in the car seat. When the sliding rail flanging is formed, the elastic rebound occurs after the material unloading, which leads to the reduction of the forming precision. Therefore, the simulation and experiment are used to study the direct flanging process of the high strength steel short vertical long stroke slideway parts. Based on the Yoshida-Uemori constitutive model and using the finite element simulation technology, the springback law of the short side long side straight flanging process is studied. The material DP780, the yield strength 880MPa and the thickness 1.6mm are flanged experiments. It is found that the sheet rebound presents three dimensional characteristics, therefore, the cross section of the sheet material is considered. In addition, with the decrease of the height of the flanging, the rebound angle of the material increases linearly with the height of the flanging, and the longitudinal fluctuation of the forming surface increases with the increase of the length of the sheet.

【作者单位】：浙江大学机械工程学院;杭州电子科技大学机械工程学院;宁波双林汽车部件股份有限公司;
【基金】：国家自然科学基金资助项目(51475130) 中国博士后基金资助项目(2013M541769) 浙江省自然科学基金资助项目(LY14E050025)
【分类号】：U463.836

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