Springback Prediction and Tooling Profile Optimization of Creep Age-Forming
MA Zhenwu1, TONG Guoquan1, XU Baolin2
(1. College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics,
Nanjing 210016, China;
2. Nanjing Chenguang Group Co., Ltd., Nanjing 210006, China )
Abstract：Creep age-forming is a metal forming process that combines creep forming with age strengthening. In
consideration of the big unloading springback value for the forming parts, it’s very important to predict the springback and
optimize the tooling profile. For the creep age-forming of LY12, we fix the classical creep constitutive equation and develop
it as a ABAQUS/CREEP subroutine. we simulate the creep and springback process and establish the springback function of
LY12, and the accuracy of the predicted value is verified by experiments. Using the variable deviation adjusting algorithm,
combines with ABAQUS/CREEP for the optimization of tooling profile, through 7 iterations, we get the profile accuracy of
97.9%. Results show this combinatorial optimization method is fast and owns high accuracy.
2017, 
