Apparatus for broaching repair of turbine rotor steeples

A broaching apparatus, the apparatus comprising:

• a broach having a cross-section corresponding to a geometry of a slot between two adjacent steeples of a turbine rotor;
• a mechanism that moves the broach through the slot between the adjacent steeples in a direction substantially parallel to a direction of extension of the slot;
• a fixture assembly configured for mounting the mechanism to the turbine rotor, wherein the mechanism comprises:
• an actuator frame coupled to the fixture assembly, and
• an actuator coupled to the actuator frame;
• a first pulley coupled to an end of the actuator opposite the actuator frame;
• a chain anchor disposed on one of the fixture assembly and the actuator frame;
• a chain having a first end coupled to the chain anchor, a middle section thereof passed through the first pulley, and a second end thereof coupled to the broach, wherein the broach is motively coupled to the actuator;
• and
• a disk mechanically linked to the actuator,
• wherein the broach is coupled to the disk, and surfaces of the broach configured to abut surfaces of the slot are curved along a length of the broach.