Influence of Lubrication on Springback in Air Bending Process of Interstitial Free Steel Sheet

摘要

This work aims at studying the influence of lubrication on springback in air bending of interstitial free steel sheets with three different orientations namely 0°, 45°, and 90° for the bending analysis. It is observed that lubrication on both punch and die shows the lowest springback compared to the dry conditions. The white grease is more effective in reducing the springback compared to dry and SAE30 oil. A statistical analysis was done to find out appropriate deviation of springback obtained from the experiments and from the material model. It is further noted that the springback exhibited a second-order polynomial relationship with the bend angle.