Transactions of Materials and Heat Treatment

Title：Research on combined forming process of cold extrusion for cartridge case

Authors： Beijing Research Institute of Mechanical & Electrical Technology Zhang Xiaoguang Zhong Zhiping Bian Yi Gao Jun Han Jinfang Beijing Changkong Machine Company Ltd.Yu Jianguo Li Jianjing

Unit：

KeyWords： Cartridge case Combined forming Cold extrusion

ClassificationCode：TG376

year,vol(issue):pagenumber：2002,27(3):1-3

Abstract：

Cartridge case is a kind of part with thin wall and thick bottom.It's a preferred forming process as cold extrusion in order to improve both compactness in structure and mechanical property for this kind of part.Several forming processes were analyzed for cartridge case in this paper.As a conclusion,the combined cold extrusion which has the properties of less steps,precise part's dimension,uniform wall thickness,simple die structure and lower cost is a good forming process for parts similar to cartridge case.The process of combined cold extrusion was simulated by means of 2D bulk forming modeling software MAFAP.No defects were found in the part by means of metallography analysis for bath production.This indicate that combined process of cold extrusion is reliable for cartridge case.

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Reference：

1　《冷挤压技术》编写组冷挤压技术上海:上海人民出版社,1976
2卢险峰冷锻工艺与模具北京:机械工业出版社,1999

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