Dual sided shot peening of blisk airfoils

A method for simultaneously shot peening first and second sides of a portion of a workpiece comprising:

• shot peening with a dual sided shot peening system including a pressurized air supply in pressurized air supply communication with independently controllable first and second shot peening air pressure regulators, the first and second shot peening air pressure regulators in pressurized air supply communication with first and second shot supplies respectively, and independently controlled first and second shot flow control valves operably disposed between the first and second shot supplies and shot peening first and second nozzles respectively;
• 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 air 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 first and second sides respectively of the portion of the workpiece.

A method for simultaneously shot peening airfoils of a BLISK, the method comprising:

• simultaneously shot peening opposite pressure and suction sides of the airfoils with a dual sided shot peening system including a pressurized air supply in pressurized air supply communication with independently controllable first and second shot peening air pressure regulators, the first and second shot peening air pressure regulators in pressurized air supply communication with first and second shot supplies respectively, and independently controlled first and second shot flow control valves operably disposed between the first and second shot supplies and shot peening first and second nozzles respectively;
• supporting and moving the BLISK with a manipulator and using the manipulator for positioning the airfoils between the first and second nozzles during shot peening by the first and second nozzles;
• 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 the first and second shot supplies into first and second streams of the first and second shot media by flowing pressurized air 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 first and second streams of the first and second shot media on the pressure and suction sides respectively of the airfoils.