Transactions of Materials and Heat Treatment

Title：Research on forming force of multi-gripper stretch forming for trapezoidal profile curved part

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ClassificationCode：TG386

year,vol(issue):pagenumber：2022,47(7):95-99

Abstract：

In order to study the influence of forming force on the stretch forming quality for 3D curved parts, for the trapezoidal profile curved part, the finite element model of trapezoidal blank in the multi-gripper stretch forming was established by finite element software ABAQUS, and the stretch forming process was numerically simulated by selecting four groups of different forming forces. The results show that when the horizontal stretch force is constant, the distributions of stress and thickness for formed part are more uniform with the increasing of oblique stretch force, but the distribution uniformity becomes worse when the oblique stretch force is further increased. However, when the oblique stretch force is three-quarters of the horizontal stretch force, the forming effect is the best, and the springback amount of the formed part is smaller and the distribution is more uniform. Using this forming force, the stretch forming experiment of trapezoidal profile curved part was conducted by the multi-gripper stretch forming machine, and the formed part had good quality. The experiment results are consistent with the numerical simulation results, which verifies the feasibility of the multi-gripper stretch forming for trapezoidal blank and the correctness of numerical simulation.

Funds：

吉林化工学院重大科技项目(2019017)；吉林化工学院博士启动基金项目（2021023）

作者简介：程艳艳（1980-），女，博士，副教授 E-mail：chengyanyan1980@sina.com

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