METODO E DISPOSITIVO PER FINITURA DI CONTORNO PER ABRASIONE CON UTENSILE VIBRANTE

摘要

Vibratory abrasive contour-finishing method and apparatus in which an axial tool longitudinally vibrated at a high-frequency is rapidly rotated about its longitudinal axis to provide a rapidly reciprocatingly revolving active tool surface for pressure engagement with a shaped surface of a workpiece in the presence of abrasive grits while the tool and the workpiece are relatively displaced translationally to move the active tool surface along the shaped surface to progress the abrasive polishing along it. The load or reciprocatingly revolving resistance encountered by the active tool surface is instantaneously sensed to produce an output signal representing a change therein. A control circuit responds to the output signal and acts on a drive unit for the relative translational displacement between the tool axis and the workpiece so as to maintain the load or resistance substantially constant.