Precision press brakes

There are 2 types of bending: Air bending Bottom bending   In what cases should you choose air bending? In air bending, the end of the punch and the 2 edges of the V allow the sheet metal to be bent. But this type of bending means there is a spring back effect of the work piece. As the bending force is weaker, the metal sheet springs backwards like an elastic when the punch is removed. You must therefore adjust the bending angle according to...