Fan rub strip in situ machining system and method

摘要

An in situ fan case rub strip machining tool (50) mounts to a LPT/fan rotor shaft assembly (22L) of a gas turbine engine (10). After a fan (38) is removed therefrom such that the machining tool (50) is rotatable about an engine axis of rotation (A) in conjunction with rotation of the LPT/fan rotor shaft assembly (22L). The machining tool (50) permits machining of a rub strip (46) within the fan case (42) of the gas turbine engine (10) without disassembly of the fan case (42) from the core engine as heretofore required. As the machining tool (50) is mounted to the LPT/fan rotor shaft assembly (22L), the cutting tool (64) is accurately locatable relative the engine axis of rotation (A) such that the rub strip (46) is evenly and precisely machined to be concentric with the engine axis (A) to assure proper fan blade tip to rub strip interface.