As has been previously mentioned in 1st report, the mechanism of fine finishing by an ultrasonically vibrated abrasive stone is, except its complexity, similar to the mechanism of superfinishing.
In this paper, the mechanism of this finishing is investigated through the measurement of the resistace T (Θ) along the rotational direction by the use of a wire-strain-gauge dynamometer and the measurement of the resistance T along the finishing direction calculated by the resistanceT (Θ).
The results are as follows :
(1) The mechanism of finishing is better understood by the measurement of the resistance T along the finishing direction than by the measurement of the resistance T (Θ) along the rotational direction.
(2) In the most suitable condition, the resistances T (Θ) in both cases are found to be much the same. The resistance T of ultrasonic finishing, however, is larger than that of the superfinishing because the angle of the finishing direction of the former remains larger than the latter for different conditions.
(3) For the same rate of stock removal, the value of the finishing resistance by the ultrasonic finishing is only a half or a quarter of the value by the superfinishing.