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

1981-09-10

1984-01-24

Husar, Francis S.

Metal deforming

By shot-blasting

29 90A, 291568B, 416241R, B21J 0000

Patent

active

044268670

ABSTRACT:
Shot peening of thin edges of workpieces which are subject to deformation damage by direct impacts is accomplished by rotating the workpiece edge near centerline through a particular angle measured from the normal 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 compressive 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.

REFERENCES:
patent: 2881506 (1959-04-01), Fuchs
patent: 3423976 (1969-07-01), Burney et al.
patent: 3482423 (1969-12-01), Murray et al.
Metal Improvement Co., "Shot Peening Applications" 6th Ed. (1980) pp. 17, 35.
Pangborn Corp., "Shot Peening" (Peening Equip. Section), circa 1961.
ASM "Shot Peening" Metals Handbook, vol. 2 (1964) p. 398-405.

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