During the bending process, the force between the upper and lower dies is applied to the material to cause plastic deformation of the material. Working tonnage refers to the bending pressure at the time of bending. The factors influencing the working tonnage are: bending radius, bending method, mold ratio, elbow length, thickness and strength of bending plate material, as shown in Figure 1.
- F: Required tonnage (tons)
- K: Material constant
- L: Bend length (mm)
- S: Material thickness (mm)
- V: V-die opening width (mm)
Usually When people calculate the Press Brake Tonnage,there is two common method
One is Calculating by the basic formula for press brake tonnage
K: Material constant(depending on the material and bending conditions, typically around 0.33 for mild steel).