A study on effects of the fiber orientation and point angle on drilling characteristics of carbon fiber epoxy composite materials

탄소섬유 에폭시 복합재료의 드릴링 특성에 있어 섬유 배열방향과 선단각의 영향에 관한 연구

The drilling experiment of carbon fiber epoxy composite material with WC-drill has been done under the various cutting conditions in order to minimize the problems occurred in the material while being drilled. It has been confirmed by a frequency analysis of the cutting force signals that the variation of cutting force resulted from the periodic variation of the angle between the ortating drill and the stacking angle of the carbon fiber. By the drilling experiment with several drills having different point angles, the drilling char- acteristics, which show the relations between the change in the point angle and cutting force or external surface condition, were analyzed.