Additive manufactured gear for a geared architecture gas turbine engine
A gear includes a multiple of gear teeth that extend from an outer portion of a rim about an axis and an inner portion of the rim about the axis, the inner portion of the rim additive manufactured.
1. A gear, comprising:
a multiple of gear teeth that extend from an outer portion of a rim about an axis;
said gear teeth subtractive manufactured from the outer portion;
and
an inner portion of said rim about said axis, said inner portion of said rim additive manufactured to the outer portion at an interface;
wherein said inner portion of said rim includes a matrix;
wherein said matrix forms a lattice structure.
2. The gear as recited in claim 1 , wherein said inner portion of said rim forms a journal bearing surface.
3. The gear as recited in claim 1 , wherein said gear is an intermediate gear of a geared architecture for a gas turbine engine, said intermediate gear is a double helical gear.
4. The gear as recited in claim 1 , wherein said inner portion provides different characteristics along an axial length.
5. The gear as recited in claim 1 , wherein said interface is a bond layer that facilitates receipt of a dissimilar material that is applied to said outer portion of said rim via an additive manufacturing process.
6. The gear as recited in claim 1 , wherein said interface is mechanical interlock.
7. A geared architecture for a gas turbine engine, said geared architecture, comprising:
a sun gear;
a ring gear that surrounds said sun gear; and
a multiple of intermediate gears in meshing engagement with said sun gear and said ring gear, each of said multiple of intermediate gears including an inner portion of a rim, said inner portion of said rim being additive manufactured, and a multiple of gear teeth that extend from an outer portion of said rim of each of said multiple of intermediate gears about an axis; said inner portion of said rim additive manufactured to the outer portion at an interface, said gear teeth manufactured via subtractive manufacturing;
wherein said inner portion of said rim forms a matrix that defines a lattice structure.
8. The geared architecture as recited in claim 7 , wherein said inner portion of said rim forms an inner periphery.
9. The geared architecture as recited in claim 8 , wherein said interface is a mechanical interface.
10. The geared architecture as recited in claim 8 , wherein said interface is a bond layer.
11. The geared architecture as recited in claim 7 , wherein each of said multiple of intermediate gears is a double helical gear.
12. The geared architecture as recited in claim 11 , wherein said inner portion provides different characteristics along an axial length.
13. A method of manufacturing a gear, comprising:
subtractive manufacturing a multiple of gear teeth from an outer portion of a rim; and
additive manufacturing an inner portion of the rim as a matrix structure that defines a lattice structure.
14. The method as recited in claim 13 , further comprising additive manufacturing the inner portion of the rim to provide different characteristics along an axial length.