抄録
Barrel polishing used in surface finishing is a very efficient processing method. However, the workpiece may have separated from the abrasive depending on the processing conditions. Though the machining condition has been determined based on experiment and experience in the expert, it is expected that the numerical simulation of the behavior of workpiece and abrasive examine it. In the barrel, compressive forces, shearing force and frictional force, etc. affect workpieces, abrasive and wall. Therefore, it is important to know the motion states of abrasive and workpieces, etc. in order to examine machining condition and cause of the segregation. In this study, the behavior of two kinds of particles in which material or diameter differ in the rotary barrel was examined both experimentally and numerically by discrete element method (DEM). To begin with, the behavior of particles in the rotary barrel that rotates about its horizontal axis in a two-dimensional system was fundamentally examined in order to specify the generation factor of the segregation. Secondary, the behavior of particles in a three-dimensional planetary barrel was examined. Then, the figure for the condition of the segregation of filled particles is shown, examining distribution rate of particles. As a result, it was demonstrated that the segregation is the combination of diameter and mass of the filled particles in both motion forms.
