Surface treatment system design for high fatigue life hollow fan blades

A system for deep rolling a fan blade comprising:

• a shaft assembly disposed along a first axis;
• a hub connected to a distal end of the shaft assembly, the hub having an upper hub portion adjacent to the distal end of the shaft assembly aligned with the first axis, and a lower hub portion extending along a second axis, the second axis forming an angle relative to the first axis;
• a roller disk joined to the lower portion of the hub, the roller disk configured to contact a fan blade;
• a fixture supporting said fan blade;
• the fixture comprising:
• a body including an upper region opposite a lower region, the body includes a front and a rear opposite the front, the body includes a right side and a left side opposite the right side;
• the body supports a pivot clamp, the pivot clamp attaches to the body with a pivot attached to the body;
• a support attached to the body, the support includes at least one brace coupled to the rear of the body, the support is configured to engage an airfoil portion of the fan blade;
• a receiver formed in the body configured to support a root of the fan blade, wherein the receiver includes at least one landing configured to support a corresponding portion of the root;
• and
• a shoulder attached to the body configured to support a platform portion of the fan blade;
• wherein the shoulder is located in an upper region of the body between the receiver and the support.

A process for securing a fan blade for deep rolling comprising:

• supporting the fan blade in a fixture, the fixture comprising:
• a body supporting a pivot clamp, the pivot clamp attached to the body with a pivot;
• engaging an airfoil portion of the fan blade with a support attached to the body;
• supporting a root of the fan blade with a receiver formed in the body;
• and
• supporting a platform portion of the fan blade with a shoulder attached to the body.