PASS calculation of punching force

Formula for calculating the punching force:

Example Round:
U = d x P
U = 10 x 3,14
U ~ 31,4 mm

F (in kN) = (U x t x Rm x 0,9 x f)/1000

F = punch force in kN

U = circumference or perimeter of the punch shape (in mm)

t = sheet thickness (in mm)

Rm = tensile strength (in N/mm²)

for Stainless Steel (1.4301) 720 N/mm²
for Steel (DC01) 420 N/mm²
for Alu (AIMg3) 220 N/mm²

f = factor between 0,5 - 0,95 when using punches with shear

Example 1: f ~ 0,5
Example 2: f ~ 0,95

PASS Stanztechnik AG

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Germany

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