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Abstract：
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During the upset forging of tube parts,instability tends to produce laps.At the same time,because the tolerance of the wall thickness is big,the upset volume is hard to control,which makes the forming very difficult and the forgings quality hard to control.In this paper,focused on the upset forging of a tube part produced in the Forging Plant of Dongfeng Moto.Co.Ltd,combined with the product fact and FE simulation,the feature of the first forging step and the principle of die design are analyzed,and some process parameters are discussed too.
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AuthorIntro：
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Reference：
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1 特种锻压工艺北京:机械工业出版社,1996:119～120
2 锻造工艺学北京:机械工业出版社,1988
3 马浩甫水套镦粗翻边工艺锻压技术,1998,23(1):10～12
4 何小诚管坯镦锻条件分析石油机械,1999(1)
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