Transactions of Materials and Heat Treatment

Title：Integral spinning forming technology of storage box bottom with super large diameter

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ClassificationCode：T306

year,vol(issue):pagenumber：2021,46(3):151-157

Abstract：

At present, the large storage box bottom is manufactured by tailor-welding the melon flap top cover in China, which has problems such as insufficient manufacturing reliability and low production efficiency. Based on the current manufacture status of the large storage box bottom, for the storage box bottom for a certain type of carrier rocket, the process scheme of first preforming and then spinning was designed, and the spinning process scheme of “one-pass shear spinning +multi-pass conventional spinning” was proposed. Then, the possibility of integral spinning forming technology for storage box bottom with super large diameter was verified by finite element analysis and process experiments. The results show that the preforming scheme effectively restrains the wrinkling of part edge, and the high precision forming of storage box bottom is realized by the forming process conbinated shear spinning and conventional spinning. In addition, the center area of box bottom adopts shear spinning which has good controllability of component shape and good die fit, and the edge area of pre-formed flange has high rigidity and adopts multi-pass conventional spinning which achieves the purpose of closing and attaching die and avoid the problem of excessive edge thinning.

Funds：

装备发展部预研共用技术项目

周磊（1990-），男，硕士，工程师 E-mail：zllz20130105@163.com

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