Analysis and Research on Springback Characteristics of Hot Stamping Forming of Compressor Blades

In order to understand the main factors of springback of centrifugal compressor impeller blades after hot stamping, the hot stamping theory and springback mechanism of sheet were firstly expounded. Then, the thermal-mechanical coupling simulation of the hot stamping process of the blade was carried out by using Abaqus simulation calculation software,and the effects of the initial temperature of the blade, the surface friction coefficient between the blade and the mold, and the pressure-holding quenching time on its springback were explored. Finally, a three-coordinate measuring machine was used to measure the blade after hot stamping. The results show that the initial temperature of the blade is more sensitive to its springback,and the low friction coefficient is beneficial to reduce the springback of the blade; when the initial heating temperature of the blade is 850 ℃, the friction coefficient is 0.2, and the pressure holding time exceeds 60 s, and the continuous pressure holding has no obvious effect on reducing the springback amount of the blade. Using a combination of numerical analysis and physical verification, the reliability results of different process parameters affecting blade springback are obtained.