You can use this calculator to work out the necessary press brake tonnage and tooling requirements to perform the bending of your parts.
This calculator is to be used for the standard air bending process.
Legend:
F (kN) – total necessary force to execute the bend
s (mm) – thickness of material to bend
V (mm) – opening of the die (8 x bending thickness recommended)
h (mm) – minimum necessary flange length
l (mm) – length of the part to be bended
R (mm) – internal radius of folded steel
σ (kg/mm²) material tensile strength
Formulas used:
Required Bending Force (F) = (1.42 x σ x S² x L) / (1000 x V)
Internal radius (R) = (5 x V) / 32