This study aimed to identify milling characteristics depending on the number of a cutting roller’s air vent and blowing velocity to remove rice bran by the cutting type milling machine which can minimize the conventional milling process. The level of whiteness was found to be 38±0.5 in all the conditions, showing consistent whiteness levels during milling. The rice temperatures turned out to be 15.4 and 14.6oC which were rather low-level under the conditions of the cutting roller with 3 vents and blowing velocities of 35 and 40 m/s respectively. Cracked rice ratio was 2.13% under the conditions of the cutting roller with 3 vents and a blowing velocity of 35 m/s. Broken rice ratio showed the range of 0.762-0.869%, reflecting a low level. Turbidity after milling was decreased, as blowing velocity became faster. Energy consumption for milled rice production was decreased, as blowing velocity became faster. The optimum milling condition for cutting type milling machine depending on air vent number of cutting roller and blowing velocity was found to be 3 vents and 35 m/s.

This study aimed to identify milling characteristics depending on the number of a cutting roller’s air vent and blowing velocity to remove rice bran by the cutting type milling machine which can minimize the conventional milling process. The level of whiteness was found to be 38±0.5 in all the conditions, showing consistent whiteness levels during milling. The rice temperatures turned out to be 15.4 and 14.6oC which were rather low-level under the conditions of the cutting roller with 3 vents and blowing velocities of 35 and 40 m/s respectively. Cracked rice ratio was 2.13% under the conditions of the cutting roller with 3 vents and a blowing velocity of 35 m/s. Broken rice ratio showed the range of 0.762-0.869%, reflecting a low level. Turbidity after milling was decreased, as blowing velocity became faster. Energy consumption for milled rice production was decreased, as blowing velocity became faster. The optimum milling condition for cutting type milling machine depending on air vent number of cutting roller and blowing velocity was found to be 3 vents and 35 m/s.

This study presents a single machine scheduling algorithm to minimize total cost(lateness cost, earliness cost and failure cost) by controlling machining speed. Generally, production scheduling uses the information of process planning and machining speed

절삭가공은 금형제작 및 항공기 구조물 등 많은 산업분야에 이용되고 있으며, 최근 가공기술의 발달로 인하여 가공면의 후처리 공정을 최소화하려는 추세에 있다. 이러한 후처리공정을 최소화하기 위한 일환으로 밀링 가공에서의 가공면의 표면거칠기와 형상 정밀도 등이 점차 중요시 되고 있다. 본 연구에서는 절삭에 영향을 미치는 인자들을 선정하고 선정된 인자들의 수준을 선정하여 절삭실험한 후 분산분석(ANOVA)을 이용하여 가공표면품위와 절삭조건과의 상관관계를 규명하며 가공면의 표면거칠기 향상에 대한 최적 절삭조건을 찾아 가공면의 품위를 향상시키고자 한다. 절삭 실험의 인자로는 절삭속도, 이송속도, 절삭폭, 절삭깊이며 수준의 수는 절삭속도 3수준 이송속도 3수준 절삭폭 2수준 절삭깊이 2수준으로 선정하여 실험을 한다.