METHOD AND DEVICE FOR IMPROVEMENT OF SURFACE REMAINING STRESS

PURPOSE:To improve the surface remaining stresses with high reliability to the same degree as shot peening by refraining from use of solid particles such as Fe balls or glass beads, and constructing the device comparatively simply. CONSTITUTION:The surface of a specimen is bombarded with liquid part...

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Bibliographische Detailangaben
Hauptverfasser:	SAKAI HIDEAKI, ICHIE KOZO, SHIOZAWA KAZUAKI
Format:	Patent
Sprache:	eng
Schlagworte:	ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL ATOMISING APPARATUS COMBINED OPERATIONS GRINDING MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR NOZZLES OTHER WORKING OF METAL PERFORMING OPERATIONS POLISHING PROCESSES FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TOSURFACES, IN GENERAL SPRAYING APPARATUS SPRAYING OR ATOMISING IN GENERAL TRANSPORTING UNIVERSAL MACHINE TOOLS
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Beschreibung
Zusammenfassung:	PURPOSE:To improve the surface remaining stresses with high reliability to the same degree as shot peening by refraining from use of solid particles such as Fe balls or glass beads, and constructing the device comparatively simply. CONSTITUTION:The surface of a specimen is bombarded with liquid particles accelerated to a high speed upon dispersing a number of bubbles therein. and these bubbles are crushed through utilization of pressure rise caused by the bombardment (checking). If the blast is performed with a high pressure pump having for example a discharge pressure of several hundreds of kg/cm and a nozzle combination having a well deviced section configuration, a high speed stream of liquid particles is obtained in which bubbles due to cabitation are dispersed. Therein it is recommended to bombard the specimen with the high speed stream while the nozzle/specimen distance is held approx. several hundreds times as large as the bore.