Method of peening airfoils and thin edged workpieces

Details Method of peening airfoils and thin edged workpieces Method of peening airfoils and thin edged workpieces

B - Operations, Transporting

21

J

29/49

B21J 5/00 (2006.01) C21D 7/06 (2006.01) C22F 1/00 (2006.01) C23C 24/04 (2006.01)

Patent

CA 1192387

Abstract Shot peening of thin edges of workpieces which are subject to deformation damage by direct impacts is ac- complished by rotating the workpiece edge near center- line through a particular angle measured from the nor mal to the shot streamline. The angle is sufficient to cause oblique blows on the centerline of the edge, but insufficient to cause direct impacts. Compressive stresses by the oblique blows provide residual com- pressive stresses along the centerline to the desired depth. The angle is calcuable from the edge radius, the depth of stressing desired at the centerline, and the depth of stressing produced by shot at a reference location. Oscillatory rotation is preferably used to obtain even peening.

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