미세심공 드릴가공에 있어서 Be-Cu 재료의 절삭시 절삭조건에 따른 구멍 내면의 거칠기 변화에 관한 연구 = A study on inner surface roughness variation in micro deep hole drilling operation of Be-Cu material

다국어 초록 (Multilingual Abstract)

Recently micro deep hole drilling is required in the whole industry. However, micro deep hole drilling has still much difficulty because of the lack of drill rigidity and the interruption of chip. We treated a micro deep hole(diameter 0.35mm, depth 3mm) used in a connector jack pin. Therefore, a surface roughness is very important. In this paper, we studied on the variation of the surface roughness for cutting conditions during micro deep hole drilling of Be-Cu material. Most of all, we tried to drill on CNC for the realization of automatization.