Shot Peening Intensity Measurement

Author:  Jack Champaigne, Electronics Incorporated/TSP
Source:  The Shot Peener magazine, Vol 06/Issue 4, Winter 1992/93
Doc ID:  1992082
Year of Publication:  1992
Abstract:  
[Excerpts from U.S. Patent 2,350,440 by J.O. Almen on Shot Blasting Test] As is well known, cold working by shot blasting improves fatigue durability of machine parts. Its effectiveness depends upon producing a thin surface layer stressed in compression by the peening action of the shot. This peening action varies with the velocity of the shot, with the size of the shot, and with the number of shot directed at the work. To assure that the operation will be properly performed, it is desirable to be able in a simple and inexpensive manner to measure intensity of shot blasting. Likewise it is necessary that manufacturing standards be set and that engineering specification show the extent of shot blasting required for a given piece of work. To meet these demands the present invention has for its object the provision of instrumentation and a plan for use whereby the effectiveness of shot blasting can be easily and quickly measured.