ANALYSIS ON THE SPINNING FORCES FOR 3D NON-AXISYMMETRICAL THIN-WALLED OFFSET TUBES

Xia Qinxiang  Zhang Saijun  Liang Baixiang  Ren Xiaolong  Ruan Feng

(College of Mechanical Engineering, South China University of Technology, Guangzhou 510640)

Abstract: The theoretical calculation formulas of the spinning forces for the 3D non-axisymmetrical thin-walled offset tubes based on the slab method are presented. The effects of the circumferential rotational angle γ of the roller, the offset value δ of the blank per path on the changes of the spinning forces are analyzed theoretically. It shows that during the offset tubes spinning, the spinning forces vary periodically along with γ, and the extent of the variation depends on the value of δ. The effects of the main processing parameters, such as the offset value δ of the blank per path, the feed rate f of the roller, and the nominal reduction Δ of the blank radius per path, on the spinning forces are analyzed experimentally and theoretically. The calculation results conform well to the experimental ones.

Key words: Offset tubes  Spin-forming  Slab method  Spinning force

CLC No: TG306

国家自然科学基金(50275054)、广东省自然科学基金(020923)、广东省工业科技攻关计划(2003C102013)和华南理工大学高水平建设苗子(73056060)资助项目. Received 20040909, received in revised form 20050404