폴리아세탈 수지의 건식 인덱서블드릴 가공에서 가공오차 감소를 위한 최적조건 선정 = Selection of Optimal Condition for Reducing Dimensional Error of Holes in Dry Cutting of Polyacetal Resin with Indexible Drill

다국어 초록 (Multilingual Abstract)

In this study, polyacetal plates were machined with an indexable drill (Ø18mm) to measure the dimensional error of holesaccording to the cutting conditions and investigate the influencing factors to obtain precision holes. Cutting velocity, feed,and cut depth were selected as experimental variables, analyzed using design of experiment, and optimal cutting conditionswere investigated. Cutting velocity and feed were significant factors affecting hole accuracy, whereas cut depth had littleeffect. The factor with the greatest influence on hole accuracy was cutting velocity, and the dimensional error of the holestended to increase as the cutting velocity increased. Dimensional error tended to decrease as feed increased. In addition,the interaction effect between cutting velocity and feed and cutting velocity and cut depth were significant. In thisexperiment, the optimal cutting velocity, feed, and cut depth needed to minimize the dimensional error of holes were 100m/min, 0.15 mm/rev, and 2 mm, respectively.