How to calculate the punching of the punch tonnage, material Q235
Converted into metric tons: divided by KN by 9.81 punch core circumference ---- the length of each side of the length of the material added to the thickness of the punching punch to penetrate the thickness of the material through the shear strength
(Mm) × the thickness of the material (mm) × the shear strength of the material (kn / mm2) = punching force (KN), the thickness of the material,
