Abstract: Dual sided shot peening system includes pressurized air supply in communication with independently controllable first and second air pressure regulators in communication with first and second shot supplies and independently controlled first and second shot flow control valves disposed between first and second nozzles and the shot supplies. Computer may be in control of regulators and valves. Nozzle supports may fixedly or movably support nozzles during shot peening. The system may be used for simultaneously shot peening first and second sides of a portion of a workpiece such as airfoils of a BLISK. First and second streams from first and second nozzles may have different properties and may be varied during shot peening.

Abstract: Dual sided shot peening system includes pressurized air supply in communication with independently controllable first and second air pressure regulators in communication with first and second shot supplies and independently controlled first and second shot flow control valves disposed between first and second nozzles and the shot supplies. Computer may be in control of regulators and valves. Nozzle supports may fixedly or movably support nozzles during shot peening. The system may be used for simultaneously shot peening first and second sides of a portion of a workpiece such as airfoils of a BLISK. First and second streams from first and second nozzles may have different properties and may be varied during shot peening.

Abstract: A method of polishing a metallic workpiece includes: mounting the workpiece in a hopper; loading the hopper with a polishing media comprising, by weight percent, more than 98% metallic chips, less than 2% liquid, and less than 0.05% abrasive; and oscillating the hopper for a run time, thereby generating a flow of the polishing media over the workpiece, until a predetermined surface finish is achieved on the workpiece.

Abstract: A test system predicts when brush holder support blocks in a traction motor frame commutator chamber are properly oriented with respect to each other and a bore axis. Brush holders are modified to include a rod extending orthogonally therefrom. First and second rods extending from opposite sides of the commutator chamber are substantially parallel, and third and fourth rods extending from opposite sides of the commutator chamber are also substantially parallel. The four rods form a rectangle-like polygon having first and second opposed sides and third and fourth opposed sides. In accordance with the testing method, the lengths of the sides, the difference between the lengths of the first and second opposed sides, and the difference between the lengths of the third and fourth opposed sides provide an indication of the orthogonality and spacing of the brush holder support blocks with respect to the bore axis.