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Abstract：
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The technonlogy of arc necking for thick walled cylinder parts is discussed It shows that,the preformation on thickness wall of the thick walled cylinder parts,using the ironing are punch designed with the isomatric theory,can completely meet the scale requirement of the final design of the products and needn't the corner cuttiny process of holes The method had been applied in a serial of products for several years and showed remarkable efficiency in economy
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AuthorIntro：
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Reference：
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1 符荣章等小口径炮弹技术实践北京:北京理工大学出版社,1997
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