Transactions of Materials and Heat Treatment

Title：Influences of conditions at tube-blank end on viscous medium outer pressure necking of thin-wall parts

Authors： GAO Tie-jun LIU Zhan-jun WANG Zhong-ji

Unit： Shenyang Aerospace University Harbin Institute of Technology

KeyWords： end conditions viscous medium outer pressure necking thin-wall parts

ClassificationCode：TG302

year,vol(issue):pagenumber：2011,36(1):124-127

Abstract：

Influences of the conditions at tube-blank end on viscous medium outer necking of thin-wall parts were analyzed by theoretical method and finite element method. Then the buckling pressure as well as the shape change of the tube-blank and the rule of its wall thickness distribution after wrinkling, under the condition of the end fixed and free were obtained. Results show that the end condition of tube-blank makes an impact on the forming quality of the viscous medium outer pressure necking of thin-wall parts. Restraining the end of the tube-blank and limiting the material flow can not only give rise to the buckling pressure, but also help to eliminate the wrinkles and increase the necking limit.

Funds：

辽宁省教育厅（2009A577）；航空基金（2009ZA54006）

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