Analysis and elimination for drum warpage of U-shaped workpiece with super length and large opening of sheet metal

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• 作者：Zemin Fu ; Zhifan Zhao ; Jia Xu ; Xiaolong Yu…
• 关键词：Incremental air ; bending forming ; Non ; uniform springback ; Warpage ; ABAQUS ; Finite element simulation ; Reverse deflection compensation
• 刊名：The International Journal of Advanced Manufacturing Technology
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：88
• 期：1-4
• 页码：931-939
• 全文大小：
• 刊物类别：Engineering
• 刊物主题：Industrial and Production Engineering; Media Management; Mechanical Engineering; Computer-Aided Engineering (CAD, CAE) and Design;
• 出版者：Springer London
• ISSN：1433-3015
• 卷排序：88

文摘

To study the mechanism of workpiece warpage under air-bending forming, a method combined experiment with numerical simulation is proposed in this paper. Based on Hill’s yielding criterion and plane strain condition, 3D ABAQUS finite element models, used to form the semiellipse-shaped workpiece with super length and large opening of sheet metal, are established. The multistep incremental air-bending forming and non-uniform springback processes are simulated. It is pointed out that a large bending force and bed deformation of press brake can lead to warpage defect of workpiece. A technique used reverse deflection compensation for bed deformation of press brake, and female die with a large opening is found to eliminate warpage defect of workpiece. Manifested by the experiment for incremental air-bending forming of this workpiece, the proposed method yields satisfactory performance in improving forming accuracy and eliminating warpage defect of a large workpiece.