다이아몬드 코어드릴의 중공비가 절삭력에 미치는 영향

Abstract

In this study, the variation of the cutting forces generated in the machining process were evaluated experimentally. A material of Al2O3 ceramic and a tool of the dynamometer were used for the measurements of the cutting forces. With the constant rates of the feed and the tool rotation, the cutting forces were measured along three axial directions(X, Y, Z axis) for the various values of the hollow ratio. It was found that the cutting force be increasing linearly along the direction of Z axis, but along X, Y axis be not varied. Also from the viewpoint of the precesses of the hole drilling, the cutting force was found to be increasing sharply at the beginning process, but from the eighth process be increasing smoothly. As conclusions, the cutting force generated by machining for the material of Al2O3 ceramic are influenced more significantly by the feed rate and the hollow ratio than by the tool rotational speed.