Dished Head Blank Diameters
Dished Head Blank Diameters
(OP)
I am trying to find out the formula for the calculation of Blank Diameters for 2:1 Semi-Ellipsoidal, Torispherical and Hemispherical dished heads.
Please reply with full reference to the text (book or code).
Hasan.
Please reply with full reference to the text (book or code).
Hasan.





RE: Dished Head Blank Diameters
For a start, you could assume the diameter of the blank was equal to the arc length up across the dome.
RE: Dished Head Blank Diameters
SE = 1.084D^2
Hemi = pi*D^2/2
F&D (using 100% and 6%) = 0.9286D^2
D (diameter) is measured in feet. I don't have any formulas for other F&D ratios. I got these formulas from an old text book, but I only have a copy of the page so I can't confirm the book name or author.
RE: Dished Head Blank Diameters
You have to remember that you have to have a different size blank depending on the head thickness and don't forget to allow for the forming allowance on the thickness.
http://www.pveng.com/Soft/Heads/Heads.htm
RE: Dished Head Blank Diameters