Sheet Metal Drawing
Compute drawing ratio m and first-draw punch force F = π d t σ_s·C₁.
Inputs
Formula
m = d/D; F = π d t σs·C1
How to use
- Fill in Punch dia. d, Blank dia. D, Thickness t, Yield σs, Coeff. C1 in the Inputs section (watch the unit on each field).
- Click Calculate; the tool evaluates the formula shown above.
- Read Drawing ratio m, Drawing force F in the results area.
Formula notesDrawing force P ≈ π·d·t·σ_b·k (d part dia, t thickness, σ_b tensile strength, k factor).