The Effect of Blanking, Tumbling and Shot-Peening on Compressor Valves

摘要

Valve components used to control the direction of flow of fluids through compressors, pumps or other pneumatic devices are subjected to dynamic loading. Studies of service valve fractures indicated that a large proportion failed due to fatigue (1-3). The fatigue cracking originated from stress concentrating defects introduced during the fabrication of the valve or the manufacture of the steel strip. The report presented studies the effect of manufacturing operations on the quality of the edges and surfaces of valve components made of high-strength strip steels. The limitations in valve processing by blanking and photoetching are shown. Valve treatment by rotation tumbling and vibratory finishing and its positive and negative effects are described.