锻压技术

铝合金小弯曲半径薄壁管数控绕弯模具设计

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

单位：成都飞机工业（集团）有限责任公司西北工业大学中国航空制造技术研究院106室

分类号：TG386

出版年,卷(期):页码：2021,46(4):150-155

摘要：

铝合金小弯曲半径薄壁管数控绕弯成形是多模具约束、多因素影响的复杂成形过程，成形过程中极易出现起皱、破裂等成形缺陷，而模具材料和结构的合理设计对成形质量的影响至关重要。通过分析铝合金小弯曲半径薄壁管的结构特点，结合导管数控绕弯工艺过程，对模具材料选取、模具结构设计及成形仿真等关键技术问题进行了研究，最终确定了铝合金小弯曲半径薄壁管数控绕弯模具的材料、结构形式、尺寸参数，通过数控绕弯成形几何运动仿真、有限元数值模拟与工艺实验，实现了满足设计要求的铝合金小弯曲半径薄壁管数控绕弯成形，证明了小弯曲半径薄壁管数控绕弯模具的可行性，为工程化应用奠定了基础。

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.

基金项目：

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

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