ABSTRACT
In ultrasonic machining, the linear material removal rate volumetric removal rate (VRR)L in mm/s can generally be described using the following empirical formula: where In case of hard and brittle materials such as glass, the machining rate is high and the role played by the free impact is noticed. When machining porous materials such as graphite, the mechanism of erosion is introduced. In this regard, the higher the ratio, the lower will be the material removal rate. Measurements also showed the decrease of material removal rate with the increase of hole depth. The material removal rate, VRR in mm/s, is given by where Material removal rate, workpiece accuracy, surface roughness, and nozzle wear are influenced by the size and distance of the nozzle, composition, strength, size and shape of abrasives, flow rate, and composition, pressure, and velocity of the carrier gas. The material removal rate is mainly dependent on the flow rate and the size of abrasives.
