What is an outer mold line?

What is an outer mold line?

Outer mold line, an aeroshell’s outer surface, mainly used in the context of aviation, such as in spacecraft boilerplates.

What is a mold line?

A line used in the development of a flat pattern for a formed piece of sheet metal. The mold line is an extension of the flat side of a part beyond the radius. The mold line dimension of a part is the dimension made to the intersection of mold lines and is the dimension the part would have if its corners had no radius.

What does OML and IML mean?

IML defines the intersection of a plane that runs along the inner surfaces of the part. It is located inside the radius part. OML is outside, but defines the intersection of the plane of the outer surfaces. It is in space, off the part.

What is OML in a drawing?

Loft is also know as the Outer Mold Line (OML) Innner Mold Line (IML) is the OML minus the thickness of the skin. Loft is the anchor and form factor of the primary structure, i.e skins, frames bulkheads, spars, ribs, stringers, longerons, etc.

What is mold line in sheet metal?

Outside mold line – The straight line where the outside surfaces of the two flanges would meet, were they to continue. This line defines the edge of a mold that would bound the bent sheet metal. Flange length – The length of either of the two flanges, extending from the edge of the sheet to the bend line.

What is the OML of an aircraft?

Aircraft Outer Mold Line (OML) Control | SBIR.gov.

What is OML in aerospace?

Aircraft Outer Mold Line (OML) Control.

What does OML stand for in aerospace?

What is the bend tangent line?

Bend tangent line (BL)—the location at which the metal starts to bend and the line at which the metal stops curving. All the space between the band tangent lines is the bend allowance. Neutral axis—an imaginary line that has the same length after bending as it had before bending.

How do you find the bend line?

Bend Allowance = Angle * (π / 180) * (Radius + K-factor * Thickness). So the flat pattern length is 1.625” + 2.625” + 0.475″ which is equal to 4.725″. So if you add up the flat length of all the flanges and add one Bend Allowance for each bend area you have the correct flat length of the part.