VERFAHREN UND VORRICHTUNG ZUM PRÄGEPOLIEREN ZUM HERSTELLEN EINER RESTDRUCKSPANNUNG ÜBER EINE WERKSTÜCKFLÄCHE

摘要

The burnishing method and apparatus (100) for implementing the method of the present invention utilizes a single-point burnishing process to provide deep compression with a minimal amount of cold working and surface hardening. In particular, the area to be burnished along the surface (178) of a workpiece (144) is defined and a freely rotating burnishing ball (114) is forced again st the surface of the workpiece (144) to produce a localized area of deformatio n having a deep layer of compression within the surface. The burnishing ball (114) is then rolled over the surface in a substantially nonoverlapping pattern. A preferred embodiment of the burnishing apparatus (100) for implementing the burnishing method comprises a socket (108) having a tip member (104) incorporating a ball seat (110), a burnishing ball (114) dispos ed within the ball seat (110), a rod member (106) integrally formed with the ti p member (104); and a socket support (102) for supporting the socket (108) on a conventional tool holder. The socket (108) is provided with means for directing lubrication fluid from an external reservoir to the ball seat (110 ) to permit the burnishing ball (114) to freely rotate and for directing a predetermined amount of lubrication fluid to the surface (178) of the workpiece (144).