2:1 ELLIPSOIDAL HEAD BLANK DIAMETER

Head Type mm
Diameter mm
Straight Face mm
Thickness mm
Material mm
Ellipsoidal Head Torispherical Head Hemispherical Head
RESULT
BLANK DIAMETER = mm
VOLUME = m3
BLANK WEIGHT = kg

This “K-SECAL” small help tool calculates the 2:1 Ellipsoidal Head Blank Diameter. Head is formed from a circular plate of approximate blank diameter calculated using below empirical formula. This diameter is good for initial planning and weight estimation.
OD + OD/24 + 2SF +2/3KR + (THK in case head thickness is equal to or greater than 25 mm/1 INCH)
Confirm with Head manufacturer before cutting the blank. Every manufacturer based on forming method have different diameter requirement.
Along with 2:1 Ellipsoidal Head Blank Diameter this tool also calculates head volume and blank weight. Select different type of metals from drop down for weight calculation. Select FPS unit to calculate diameter in “inch”.
Compare above data between different types of heads (Hemispherical and Torispherical) by selecting from drop down.


Following formula has been used for calculating the Ellipsoidal head blank diameter:


For plate thickness less than 25 mm / 1.0 inch

Blank Diameter = D + (D/42) + (2*S.F)+ ((2/3) * Kr)

For plate thickness equal or more than 25 mm / 1.0 inch
Blank Diameter = D + (D/42) + (2*S.F) + ((2/3) * Kr)+ thk

where,
D = Outside Diameter of Ellipsoidal Head
S.F. = Straight Face
Kr = 0.17*D = Knuckle Radius
thk = Thickness of Head

Click below tabs to see the formula for calculation of:-

Head Volume


Head Blank Weight