TOOL FOR SHAPING COMPLEX-PROFILE INTER-BLADE DUCTS OF ONE-PIECE IMPELLER OF GAS TURBINE ENGINE Russian patent published in 2006 - IPC B23C5/14 

FIELD: aircraft engine manufacture, making of gas turbine engine one-piece impellers having complex-profile blades with large twisting.

SUBSTANCE: tool is mounted with possibility of rotation around its own axis and it includes cutting edges uniformly arranged on perimeter of body of revolution at its end side. In order to improve efficiency of forming blades tool is in the form of ring mounted inside housing in such a way that its lateral surface may move on inner annular surface of housing. Said ring may be driven to rotation around its own axis by means of gear transmission. Housing embraces more than half of ring. Lateral surface of ring may be mounted in bearing assembly arranged on inner annular surface of housing and it has teeth engaged with pinion mounted in housing for forming usual or planetary gear transmission. Cutting edges of tool may be detachable ones or they may be arranged on detachable annular insert. Cutting edges of tool may be T-shaped.

EFFECT: enhanced operational effectiveness of tool.

6 cl, 3 dwg