Punching Force Calculator
Calculate the required force for punching operations in metal fabrication
Typical range: 0.5mm to 25mm
For round punch: π × diameter
Typically 1.2 to 1.5 for most applications
Punching Force Result
0
kN (KiloNewtons)
Tons Required:
0
Material:
Mild Steel
Shear Strength:
345 N/mm²
How to Use This Calculator
- Enter material thickness in millimeters
- Select material type or enter custom shear strength
- Input punch perimeter (for round punches: π × diameter)
- Adjust safety factor if needed
- Click “Calculate Force”
Frequently Asked Questions
What is punching force in metal fabrication?
Punching force is the amount of pressure required to punch a hole through a metal sheet or plate. It depends on the material’s shear strength, thickness, and the perimeter of the punch.
How do I calculate punch perimeter for different shapes?
For round punches: perimeter = π × diameter. For square/rectangular punches: perimeter = 2 × (length + width). For complex shapes, sum all the side lengths.
Why is a safety factor needed in punching calculations?
The safety factor accounts for variables like material inconsistencies, tool wear, and machine efficiency. It ensures the punching machine has sufficient capacity for the operation.
What are typical shear strength values for common metals?
Mild Steel: 300-400 N/mm², Stainless Steel: 500-700 N/mm², Aluminum: 100-200 N/mm², Brass: 250-350 N/mm², Copper: 200-300 N/mm².