Control model and the experimental study on the ultrasonic vibration-assisted electrolytic in-process dressing internal grinding

Based on the ultrasonic vibration technology and the electrochemical principle, the ultrasonic vibration-assisted electrolytic in-process dressing internal (UAEI) grinding is realized on the vertical machining center. The mathematical control model of the UAEI grinding is established to maintain the protrusion height of abrasive grains. Simulations and fittings show that the average current is positively associated with the increase of ultrasonic frequency, grinding speed or workpiece speed, and the decrease of grinding ratio. Concrete control schemes are made by adjusting the controllable parameters. The objective judgments are obtained by comparing the experimental results under different processing conditions. The experimental results show that the surface roughness of workpiece can research 0.0487 mu m, the grinding force ratio maintains at relatively stable level, topography of oxide layer presents uniform-distributed cavities, and surface micro-topography of workpiece becomes smoother with the processing parameters determined by the control model of the UAEI grinding, proving the validity of this control model of the UAEI grinding.