Transactions of Materials and Heat Treatment

Title：Springback compensation and experimental verification of straight convex bending parts with sagging

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ClassificationCode：V263+2

year,vol(issue):pagenumber：2021,46(10):78-82

Abstract：

In order to improve the forming quality of aircraft sheet metal parts, the springback issue in the forming process of rubber bag for straight convex bending parts with sagging was studied. A uniaxial tensile experiment was performed on the 2024-W aluminum alloy material in the new quenched state, and the mechanical property parameters of the material were obtained, which provided conditions for springback compensation and finite element simulation. The CATIA secondary development system was used to compensate the springback in the round fillet and flanged parts of the straight convex bending sheet metal parts with sagging, and an accurate springback compensation mold was generated. The finite element simulation software Pam-stamp 2G was used to conduct numerical simulation and experimental verification for the compensation mold newly designed. The feasibility of a straight convex bending compensation mold with sagging designed by the springback compensation module was verified. The results show that when the forming pressure is 50 MPa, the angle error of part before and after springback is 1°, which meets the requirements of dimension design. The credibility of finite element simulation and the accuracy of springback compensation system are verified.

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作者简介：张凌云(1963-)，男，博士，教授 E-mail：zhangly79@163.com 通信作者：徐淑赢(1994-)，男，硕士研究生 E-mail：1247953444@qq.com

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