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摘要：
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基于ISO-CD24213/2006方法,以回弹角作为回弹值,运用Dynaform对高强钢板的冲压成形及回弹进行数值模拟,分析了板料厚度、板料宽度、压边力、拉延筋及材料性能等因素对回弹值的影响。研究发现:较小压边力下回弹值随板料厚度的增加而减小,较大压边力下则先增大、后减小,且随着压边力的增大回弹值显著减小;此外,减小板料宽度、合理布置拉延筋、选择屈服强度较小的材料均可减小回弹值。
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Based on ISO-CD24213/2006 method,taking the angle as springback value,the forming and springback processes during stamping of high stress steel were simulated respectively using the commercial FE software Dynaform.The influencing factors,such as sheet thickness,sheet width,blank holder force,draw bead and material properties were investigated,and the influence laws were obtained.The conclusions show that the springback angle will decrease with the increase of sheet thickness under a small blank holder force,while it will increase at first then decrease with the increase of blank holder force under a large blank holder force.Besides,it will decrease with the decrease of sheet width,draw beads arranged reasonably and materials of small yield strength.
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基金项目：
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湖北省自然科学基金资助项目(2004ABA052)
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作者简介：
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参考文献：
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[1]焦明华,于军涛,解挺,等.板材冲压成形回弹模拟的评述[J].锻压技术,2007,32(6):1-5.
[2]赵国伟,王元勋,陈建桥,等.材料成形回弹的数值模拟与影响因素[J].锻压装备与制造技术,2005,(3):55-58.
[3]祝洪川,李荣锋,严龙.拉弯回弹试验参数的影响性研究[A].第十届全国塑性工程学术年会、第三届国际塑性加工先进技术研讨会论文集[C].南昌,2007.
[4]赵军,苏春建,官英平,等.U形件弯曲影响回弹因素模拟分析[J].锻压技术,2007,36(6):136-140.
[5]ISO-CD24213-2006,Metallic materials-sheet and strip-Meth-od for springback evaluation in stretch bending[S].
[6]张冬娟,崔振山,李玉强,等.平面应变板料拉弯成形回弹理论分析[J].工程力学,2007,24(7):66-71.
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