Transactions of Materials and Heat Treatment

Title：Study of deformation mechanism of backward ball spinning of thin-walled tube with longitudinal inner ribs

Authors： JIANG Shu-yong1 GU Wei-dong2 LI Chun-feng3 ZHANG Jun1(1.Engineering Training Center Harbin Engineering University Harbin 150001 China 2.Harbin Aircraft Industry Group Harbin 150001 China 3.School of Materials Science and Engineering Harbin Institute of Te

Unit：

KeyWords： ball spinning power spinning longitudinal inner rib thin-walled tube

ClassificationCode：TG376

year,vol(issue):pagenumber：2008,33(5):88-91

Abstract：

As a successively and locally plastic deformation process,backward ball spinning was applied to forming thin-walled tubular part with longitudinal inner ribs.During backward ball spinning,the metal in the deformable zone was caused to be in a three-compressive stress state which contributed to formability of the inner ribs.Based on plastic yield criterion,minimum resistance law and local plastic forming theory,the deformation zone along the circumferential direction of the tubular blank was divided into the contact zone and the front zone in which the stress and strain state was given,and the forming process of the inner ribs was analyzed by means of four stages where ball moved along the circumferential direction.In the end,deformation mechanism of the inner ribs of the spun part was revealed.

Funds：

黑龙江省留学归国基金项目资助(lc01c13)

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