본 연구에서는 머시닝센터에서 엔드밀로 일반 구조용 압연강(SS400)의 곡면을 절삭 가공할 때 발생하는 절삭 저항의 변화와 비접촉 음향 센서에 의한 절삭 소음의 변화를 비교·분석함으로써, 곡면 가공에서 절삭력에 변화를 주는 요인을 알아보았다. 또한 간단한 수학적 계산에 의한 보정 이송 속도를 적용시켜, 평면 가공에서와 같은 절삭력을 일정한 범위 내로 유지하도록 하였다. 실험은 머시닝센터에서 곡면의 내·외측 반지름, 이송 속도, 절삭 속도 및 엔드밀의 지름 등을 변화시키면서 ...
본 연구에서는 머시닝센터에서 엔드밀로 일반 구조용 압연강(SS400)의 곡면을 절삭 가공할 때 발생하는 절삭 저항의 변화와 비접촉 음향 센서에 의한 절삭 소음의 변화를 비교·분석함으로써, 곡면 가공에서 절삭력에 변화를 주는 요인을 알아보았다. 또한 간단한 수학적 계산에 의한 보정 이송 속도를 적용시켜, 평면 가공에서와 같은 절삭력을 일정한 범위 내로 유지하도록 하였다. 실험은 머시닝센터에서 곡면의 내·외측 반지름, 이송 속도, 절삭 속도 및 엔드밀의 지름 등을 변화시키면서 절삭유를 공급하지 않는 상태로 상향 절삭을 하며 절삭 저항 및 절삭 소음을 측정하였다. 그 결과 곡면 가공은 평면 가공에 비하여 반지름이 작을수록, 또 엔드밀 지름은 클수록, 외측 원호부에서 절삭 저항과 절삭 소음이 적게 나타났으며, 내측원호부에서는 절삭 저항과 절삭 소음이 크게 나타났다. 또한 곡면과 평면 가공에서 절삭 저항은 절삭 속도가 빠를수록 적었으며, 이송 속도가 커질수록 증가하였다. 곡면과 평면 가공에서 절삭 속도와 이송 속도가 증가하면 절삭 소음이 증가하나 변화 폭은 절삭 속도에서 더 크게 나타났다. 절삭 속도가 증가하면 절삭 저항은 감소하였으나 절삭 소음은 증가하였으므로, 절삭 소음은 절삭 저항보다 절삭 속도의 영향을 크게 받음을 확인하였다. 본 연구에서 제안한 보정 이송 속도 공식을 이용하여 곡면을 가공한 결과, 평면 가공과 비교적 근사값인 절삭 저항과 절삭 소음이 나타났으므로, 그 제어가 가능하였다.
본 연구에서는 머시닝센터에서 엔드밀로 일반 구조용 압연강(SS400)의 곡면을 절삭 가공할 때 발생하는 절삭 저항의 변화와 비접촉 음향 센서에 의한 절삭 소음의 변화를 비교·분석함으로써, 곡면 가공에서 절삭력에 변화를 주는 요인을 알아보았다. 또한 간단한 수학적 계산에 의한 보정 이송 속도를 적용시켜, 평면 가공에서와 같은 절삭력을 일정한 범위 내로 유지하도록 하였다. 실험은 머시닝센터에서 곡면의 내·외측 반지름, 이송 속도, 절삭 속도 및 엔드밀의 지름 등을 변화시키면서 절삭유를 공급하지 않는 상태로 상향 절삭을 하며 절삭 저항 및 절삭 소음을 측정하였다. 그 결과 곡면 가공은 평면 가공에 비하여 반지름이 작을수록, 또 엔드밀 지름은 클수록, 외측 원호부에서 절삭 저항과 절삭 소음이 적게 나타났으며, 내측원호부에서는 절삭 저항과 절삭 소음이 크게 나타났다. 또한 곡면과 평면 가공에서 절삭 저항은 절삭 속도가 빠를수록 적었으며, 이송 속도가 커질수록 증가하였다. 곡면과 평면 가공에서 절삭 속도와 이송 속도가 증가하면 절삭 소음이 증가하나 변화 폭은 절삭 속도에서 더 크게 나타났다. 절삭 속도가 증가하면 절삭 저항은 감소하였으나 절삭 소음은 증가하였으므로, 절삭 소음은 절삭 저항보다 절삭 속도의 영향을 크게 받음을 확인하였다. 본 연구에서 제안한 보정 이송 속도 공식을 이용하여 곡면을 가공한 결과, 평면 가공과 비교적 근사값인 절삭 저항과 절삭 소음이 나타났으므로, 그 제어가 가능하였다.
The purpose of this study is to examine the main factors of the change of the cutting force carefully by comparing and analysing the changes of the cutting resistance and noises measured by noncontact acoustic sensor, which are generated in cutting the curving surface of rolled steel for general str...
The purpose of this study is to examine the main factors of the change of the cutting force carefully by comparing and analysing the changes of the cutting resistance and noises measured by noncontact acoustic sensor, which are generated in cutting the curving surface of rolled steel for general structure(SS400) by an end mill in machining center. And it is to have the cutting force keep in a fixed range as in plane processing, by appliying correct feed rates by simple mathematical computation to curve processing. The experiment in machining center was carried out to measure the cutting resistance and noises by changing the convex and concave contour radius of curving surface, feed rates, cutting speed and the diameter of an end mill without cutting oil. As a result, it was recognized that in convex contour the cutting resistance and noises decreased as the radius was getting smaller and the diameter of an end mill was getting larger, while in concave contour the cutting resistance and noises increased. In the curve and plane processing, the cutting resistance decreased as the cutting speed was growing faster and increased as feed rates was getting larger. In the curve and plane processing, .the cutting noises increased as the cutting speed and feed rates was becoming larger, but the range of the change of the cutting noises was more influenced by the cutting speed than by feed rates. As the cutting speed increased, the cutting resistance decreased, but the cutting noises increased. Therefore, it was identified that the cutting noises was more affected by the cutting speed than by the cutting resistance. The result of curve processing by correct feed rates formula suggested in this study was approximate to the cutting resistance and noises in the plane processing. Therefore, it was proved that the cutting resistance and noises in curving processing could be controled.
The purpose of this study is to examine the main factors of the change of the cutting force carefully by comparing and analysing the changes of the cutting resistance and noises measured by noncontact acoustic sensor, which are generated in cutting the curving surface of rolled steel for general structure(SS400) by an end mill in machining center. And it is to have the cutting force keep in a fixed range as in plane processing, by appliying correct feed rates by simple mathematical computation to curve processing. The experiment in machining center was carried out to measure the cutting resistance and noises by changing the convex and concave contour radius of curving surface, feed rates, cutting speed and the diameter of an end mill without cutting oil. As a result, it was recognized that in convex contour the cutting resistance and noises decreased as the radius was getting smaller and the diameter of an end mill was getting larger, while in concave contour the cutting resistance and noises increased. In the curve and plane processing, the cutting resistance decreased as the cutting speed was growing faster and increased as feed rates was getting larger. In the curve and plane processing, .the cutting noises increased as the cutting speed and feed rates was becoming larger, but the range of the change of the cutting noises was more influenced by the cutting speed than by feed rates. As the cutting speed increased, the cutting resistance decreased, but the cutting noises increased. Therefore, it was identified that the cutting noises was more affected by the cutting speed than by the cutting resistance. The result of curve processing by correct feed rates formula suggested in this study was approximate to the cutting resistance and noises in the plane processing. Therefore, it was proved that the cutting resistance and noises in curving processing could be controled.
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