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Abstract：
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Extrusion has become an increasingly attractive manufacturing process for the production of boxes,which substituted sheet matel stamping and machining.Complex box differs with regular ones in extrusion ,the article start from matel flow specialities study of complex box during extrusion.A new kind of flow arrest groove with direction is presented on this basis.At the same time,it is validated that flow arrest groove is feasible in controlling matel flow by experiment,provided reference for use in the same type part.
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Reference：
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1 王孝培冲压手册(第二版)北京:机械工业出版社,1990:461
2 闫洪,林治平等盒形件反挤变形的上限分析塑性工程学报,2000(1):26～29
3 YHLu,SWLo.Optimally controlledstrain ratediesforplane strainex trusion.J.Mater.Process.Technol.1999,86:56～66
4 汪大年金属塑性成形原理北京:机械工业出版社,1986:4
5 姚若浩金属压力加工中的摩擦和润滑北京:冶金工业出版社,1990:249
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