The combination of superplastic differential temperature drawing (SDTD) and sizing was investigated with thermal-mechanical coupled numerical simulation and experiment. Initial blank of the bracket with large drawing ratio was calculated. In the simulation, the power-law constitutive model of AA5083 was established as function of temperature and implanted in software MARC through new complied subroutine. In SDTD practice, the temperature of female die was kept at 525 ℃, i.e. the optimal superplastic temperature of AA5083, and the punch was cooled by the flowing water throughout the forming process. Also, the sizing process was carried out at 525 ℃. Under the guide of the numerical simulation, two sets of tools were fabricated and the bracket was successfully manufactured via the combination of SDTD and sizing. Results revealed that the formed bracket has a sound uniform thickness distribution. Good agreement was obtained between the formed thickness profiles and the predicted ones.
