抄録
For the purpose of obtaining practical guidelines for controlling the vibration that produces on the plunge-cut ground surface the local variations of the light reflectivity, the mechanism by which the dynamic unbalance of the rotating grinding wheel generates the dynamic variation of the instantaneous stock removal and hence the onset of the grinding vibration has been studied by theoretical analysis as well as grinding experiments. Experiments have also been carried out to optimize the method of varying the rotational speed of the wheel, of which effect was demonstrated by a former study. By monitoring the oscillation of the machine body at the frequency of the wheel rotation, it is first recommended to adjust the wheel balance to minimize the monitored oscillation prior to the dressing operation. The subsequent grinding operation has to be carried out without introducing any balance adjustment and wheel speed variation after the dressing. Effect of the balance adjust procedure in suppressing the grinding vibration is further enhanced by introducing the wheel speed variation. According to grinding test results comparing the rectangular and triangular patterns of the wheel speed variation, the former has been found more effective, which at a ±10% range variation for 4 minutes period seems to result in an optimum effect for practice.
