Dual sided shot peening of BLISK airfoils

A method for simultaneously shot peening pressure and suction sides of a BLISK with airfoils comprising:

• supporting and moving the BLISK with a manipulator and using the manipulator to position the airfoils between a first nozzle and a second nozzle during shot peening by the first and second nozzles,
• shot peening with a dual sided shot peening system including a pressurized air supply in pressurized air supply communication with separate and independently controllable first and second shot peening air pressure regulators, the first and second shot peening air pressure regulators being coupled to a computer and in pressurized air supply communication with first and second shot supplies respectively, and separate and independently controlled first and second shot flow control valves being coupled to the computer and operably disposed between the first and second shot supplies and the first and second nozzles respectively, wherein shot peening comprises:
• supplying pressurized air from the pressurized air supply to the first and second shot peening air pressure regulators;
• metering first and second shot media in first and second shot supplies into first and second streams of the first and second shot media by flowing pressurized aft from the first and second shot peening air pressure regulators into the first and second shot supplies respectively;
• flowing the first and second streams of the first and second shot media from the first and second shot supplies through individually or independently controlled first and second shot flow control valves respectively and independently regulating the first and second streams of the first and second shot media with the first and second shot flow control valves respectively;
• flowing the first and second streams of the first and second shot media from the first and second shot flow control valves to the first and second nozzles respectively;
• and
• shooting the first and second streams of the first and second shot media on the pressure and suction sides respectively of the airfoils,
• wherein the first nozzle and second nozzle are separate and controlled independently of each other;
• wherein the computer is configured to set different first and second intensities of the first and second streams from the first and second nozzles to provide different first and second coverage rates for simultaneously shot peening the pressure and suction sides respectively of the airfoils so as to manage movement of the airfoils during the shot peening.