How to Calculate Flat Pattern of a Cone for sheet-metal?
Nowadays it’s very easy to find a flat pattern of any shape for sheet-metal cutting by various advanced CAD software like SolidWorks, ProE, etc…
But some of you might be curious to know the
calculations behind it in a old fashioned way.
Below are the calculations to cut a profile/flat pattern for bending a cone.
Cone
Outline:
Below is the input requirement for calculations:
dB = Cone Bottom Diameter
dT = Cone Top Diameter
h = Cone Height
Calculated
Values:
Calculate the below values from the inputs as shown in
above figure:
hT = Triangle Height
rH = Radius for Cone Height
r = Pattern Outer Radius
C = Cone Circumference
CT = Total Pattern Circumference
A = Arc Angle
Formulas:
Now calculate the below values based on earlier outputs:
Now you have the desired values required for profile cutting, I have shown the below example with calculations for your reference:
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