드릴에 발생한 구성인선이 토오크에 미치는 영향

Abstract

드릴링시 드릴에 구성인선의 발생을 고려한 경우와 고려하지 않은 경우에 주절삭날에 작용하는 토오크를 각각 구하고 이 값들이 전체토오크에 차지하는 비율을 고려하여 전체토오크에 대한 비를 구했다. 그 결과 구성인성을 고려해서 실제유효경사각을 이용하여 구한 전체토오크가 구성인선의 발생을 고려하지 않고 유효경사각과 수직경사각을 사용해서 구한 전체토오크 보다 약 5%와 10%가 작다는 것을 알았다.

In drilling, torques acting on the main cutting edges are calculated under the conditions with and without the built-up edge on a drill respectively and by considering the percentages of these values to the total torque, the ratios of the total torque of the former to the total torques of the latter are computed. The result is obtained that the total torque computed by the real effective rake angle with the built-up edge is about 5% and 10% less than the total torques by the effetive rake angle and the normal rake angle without the built-up edge.

In drilling, torques acting on the main cutting edges are calculated under the conditions with and without the built-up edge on a drill respectively and by considering the percentages of these values to the total torque, the ratios of the total torque of the former to the total torques of the latter are computed. The result is obtained that the total torque computed by the real effective rake angle with the built-up edge is about 5% and 10% less than the total torques by the effetive rake angle and the normal rake angle without the built-up edge.