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Metal stamping formulas

Metal Stamping Factor	Formula
Inch Tons Blanking	BE = T x Mt x 0.5
Inch Tons Drawing	DE = T x Dl x 0.63
Stripping Tonnage	P = 1.7 x L x Mt
Blanking Formula	T = L x Mt x Ss/2000
Blanking Diameter for Drawing	BD = square root of √ d+ (4 x d x h)
Minimum Draw Diameter	MD = BD * 0.6
Press Slide Velocity	V = 0.5233 x SPM x √ (Ps x Ws) - Ws
Inch Tons Energy Capacity	ITC = T x PRP
Blank Holder Pressure	BHP = 0.20 x T
Tonnage Round Hole	T = 3.14 x d x Mt x Ms

Formula abbreviations

BD = Blank Diameter
BE = Blanking Energy (Inch Tons)
BHP = Blank Holder Pressure
d = diameter
DE = Draw Energy (Inch Tons)
Dl = Draw length
h = height
ITC = Inch Tons Capacity
L = Length of Cut
MD = Minimum Diameter

Mt = Material Thickness
PRP = Press Stroke Length
Ps = Press Stroke Length
SPM = Strokes Per Minute
Ss = Material Shear Strength
St = Stripping Tonnage
T = Tonnage
V = Press Slide Velocity
Ws = Work Stroke Length

The reference for this table is from:
http://www.machconsult.com/reference/stamp_form.php

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