Transactions of Materials and Heat Treatment

Title：Simulation and optimization on stretch bending process for variable cross-section profile

Authors： Jin Yan Du Jianning Cui Li Wang Jinquan Wang Xinyu Guan Zhibin

Unit： AVIC Shenyang Aircraft Corporation

KeyWords： 7075 alminum alloy variable cross-section profile stretch bending wrinkling springback

ClassificationCode：TG394

year,vol(issue):pagenumber：2023,48(3):88-94

Abstract：

The finite element simulation model was established by the characteristics of 7075 aluminum alloy variable cross section edge strip parts, and the influences of various process parameter in the forming process of variable cross-section profile on the surface quality problems of wrinkling and springback generated during the stretch bending of parts were studied. The selection of stretch bending simulation process parameters under different conditions of equal and variable cross-sections directly affected the forming results. And increasing the tensile force could effectively solve the wrinkling phenomenon of parts after stretch bending. Under the same tensile force, reducing the width of profile could avoid the problem of profile breakage, and increasing the cladding angle could reduce the amount of springback of part after stretch bending and shorten the displacement relative to the die after the part was unloaded. The process simulation and the optimization of process parameters can solve the wrinkling and springback phenomena of parts after stretch bending, and the process verification of simulation results is carried out by the process tests.

Funds：

金妍(1978-)，女，学士，高级工程师 E-mail：584496540@qq.com

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