Transactions of Materials and Heat Treatment

Title：Research on CNC draw-bending die design for aluminum alloy thin-walled tube with small bending radius

Authors： Li Guangjun Sun Hong Zeng Yuansong Yang Jingchao Wang Qiaoling Li Heng Wu Wei

Unit： Chengdu Aircraft Industry (Group) Co. Ltd. Northwestern Polytechnical University China Aviation Manufacturing Technology Research Institute

KeyWords： aluminum alloy small bending radius thin-walled tube CNC draw-bending bending die

ClassificationCode：TG386

year,vol(issue):pagenumber：2021,46(4):150-155

Abstract：

The computer numerical control (CNC) draw-bending of aluminum alloy thin-walled tube with small bending radius is a complex forming process with multiple die constraints and multiple influencing factors, and forming defects such as wrinkles and cracks are very easy to appear during the forming process. However, the reasonable design of die material and structure is very important to the forming quality. By analyzing the structural characteristics of aluminum alloy thin-walled tube with small bending radius, combined with the CNC draw-bending process of duct tube, the key technical issues such as die material selection, die structure design and forming simulation were studied, and finally the material, structure and size parameters of CNC draw-bending die for aluminum alloy thin-walled tube with small bending radius were determined. Through the geometric motion simulation, finite element numerical simulation and process experiment of CNC draw-bending, the aluminum alloy thin-walled tube with small bending radius meeting the design requirements was successfully produced by CNC draw-bending, and the feasibility of CNC draw-bending die for thin-walled tube with small bending radius was proved to lay the foundation of engineering applications.

Funds：

李光俊（1970-），男，工程学士，研究员 E-mail：lgjwlc@sina.com

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