환경친화적 건식 드릴링을 위한 드릴현상 및 절삭조건 = Drill Shape and Cutting Conditions for Environmentally Conscious Drilling

다국어 초록 (Multilingual Abstract)

In this paper, drill shape and cutting conditions for environmentally conscious dry drilling of A319 Al-alloy are studied by experimental method. The experiment is planned with Taguchi's method that is based on the orthogonal array of design factors. The result is summarized as follows; (1) Drill geometry optimization can increase the number of holes in dry' drilling, and also large helix angle and large point angle are desirable in dry drilling. (2) It is found that cutting conditions, that is, cutting speed and feed rate are closely related to the drill geometry. (3) For dry drilling of Al-alloys, drill shape and cutting conditions are selected and tested by experimental method. But it is found that the perfect dry drilling is difficult because of the machining characteristics of Al-alloys, and so new machining method such as minimal lubricant application is required.