In this study, the relationship between cutting conditions and surface roughness in the drilling process of polyoxymethylene was investigated to determine optimal cutting conditions. Generally, while previous researches primarily utilized solid type small-diameter drills with diameters below 10mm, this study employed an insert type single blade drill with 18mm diameter. An L18(21×33) orthogonal array table was designed for experiment, and quantitative analysis was conducted using the Taguchi method. The experimental variables included cutting fluid, cutting speed, feed rate, and finish allowance, with surface roughness(Ra, μ m) adopted as the dependent variable. The experimental results indicated that cutting fluid had the greatest influence on the surface roughness in polyoxymethylene cutting, followed by feed rate and cutting speed, while finish allowance had minimal effect on the surface roughness. In conclusion, to achieve high surface integrity, it is advisable to reduce the feed rate and increase cutting speed in wet machining condition. The optimal cutting conditions derived from this experiment were wet cutting, cutting speed of 300m/min, feed rate of 0.05mm/tooth, and finish allowance of 1mm.
한국어
본 연구에서는 폴리옥시메틸렌의 드릴가공 시 절삭조건과 표면거칠기의 관계를 파악하고 최적 가공조건을 선정하고자 하였다. 특히 기존 연구에서는 직경 10mm이하 소구경 일체형 드릴 사용이 대부분이었으나 본 연구에서는 직경 18mm, 인서트 체결형 1날 드릴을 이용하였다. 실험을 위해 L18(21×33) 직교배열표를 구성하고 다구찌방법을 활용하여 정량적으로 분석하였다. 실험변수는 절삭유, 절삭속도, 이송, 그리고 정삭여유이며 종속변수는 표면거칠기값(Ra, μm)을 채택하였다. 실험결과 폴리옥시메틸렌의 표면거칠기값 형성에 가장 큰 영향을 미치는 변수는 절삭유이며, 다음으로 이송, 절삭속도 순으로 영향력이 있었으나 정삭여유는 반응값에 미치는 영향력이 미미하였다. 결론적으로 높은 표면품위를 획득하기 위해서는 절삭유를 공급하는 습식가공 상태에서 이송량은 감소시키고 절삭속도를 높이는 방법을 채택해야 한다. 본 실험을 통해 도출된 최적 가공조건은 습식가공, 절삭속도 300m/min, 날당이송 0.05mm/tooth, 그리고 정삭여유 1mm이다.
Ever since next generation convergence technology became one of the most important industries in the nation, computing professionals have encountered a growing number of challenges. Along with scholars and colleagues in related fields, they have gathered in avariety of forums and meetings over the last few decades to share their knowledge, experiences and the outcome of their research. These exchanges have led to the founding of the International Next-generation Convergence technology (INCA) on December 1, 2015. INCA was registered as an incorporated association under the Ministry of Information and Communications. The main purpose of the organization is to improve our society by achieving the highest capability possible in next generation convergence technology.
간행물
간행물명
차세대융합기술학회논문지 [The Journal of Next-generation Convergence Technology Association]