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摘要：
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回弹是微车大梁冲压成形过程中的主要质量缺陷之一,直接影响到冲压件的尺寸精度和零件最终形状。为了有效地控制回弹,基于变压边力技术对某型微车右后大梁的冲压过程进行了设计和仿真,并对仿真结果进行了分析。结果表明,压边力变化的范围越大,零件的回弹量越小。最后,提出了一种可应用于工程实践的变压边力优化方法,并在微车右后大梁的回弹控制上进行了应用,起到了很好的效果,使右后大梁最大开口回弹角由之前的8°减小到了2°。
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The springback phenomenon in mini-car beam forming is one of the main quality problems,which may affect the tolerance and final shape of stampings.In order to control springback effectively,mini-car's right back beam forming was designed and simulated based on variable blank holder force technology.The result of simulation indicates that the larger span of blank holder force can induce fewer springback.Finally,a kind of variable blank holder force method which could be conveniently realized in inverted draw die was introduced.This method has been applied to the drawing of mini-car's right back beam which has good effects on springback control.Maximum springback angle diminishes from 8° to 2°.
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基金项目：
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上汽通用五菱(SGMW)供应商质量能力提升项目(20070701);;
柳州市重点科技攻关项目
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作者简介：
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参考文献：
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[1]Liu Y C.The effect of restraining force on shape deviation inflanged channels[J].Tarn.ASME,J.Engng.Mat.Techn-ol.,1988,110:389-394.
[2]Schmockel D,Beth M.Springback reduction in draw-bendingprocess of sheet metals[J].Annals of the CIRP,1993,42(1):339-342.
[3]Lin Zhongqin,Liu Gang.Study on the effects of numerical pa-rameters on the precision of springback prediction[A].6thInternational LS-DYNA User’s Conference 2000[C].Dear-born,Michigan,2000.
[4]姚勇.微型车市场现状及发展分析[J].科技创业,2006,11:99-100.
[5]陈毓勋.板材与型材弯曲回弹控制原理与方法[M].北京:国防工业出版社,1990.
[6]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,2007,32(6):136-140.
[7]张蓉,贺四清.汽车弯曲件回弹问题的解决办法[J].新技术新工艺,2004,(4):36-37.
[8]李欧卿,梁庆伟,武殿梁.板金弯曲成形回弹问题的理论研究[J].塑性工程学报,2003,10(2):47-51.
[9]刘艳芳,施法中.板料冲压成形回弹的有限元数值模拟研究[J].锻压技术,2004,29(4):36-39.
[10]刘世豪,王东方,苏小平,等.基于Dynaform的汽车覆盖件冲压成形及回弹仿真的研究[J].电加工与模具,2007,(6):53-58.
[11]印雄飞,阮雪榆.板料成形过程的数值模拟[J].塑性工程学报,1999,6(1):21-25.
[12]杨安民.压边力对板料U形弯曲回弹的影响[J].模具工业,2007,(8):44-48.
[13]张晓斌,孙宇,樊红梅,等.板料成形压边力控制技术研究现状及发展趋势[J].锻压技术,2007,32(6):6-12.
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