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여만구,윤종학 서울산업대학교 산업대학원 1996 大學院論文集 Vol.4 No.-
This study is focused on the prediction of appropriate tool life by clarifying the correlation between progressive tool wear and AE(Acoustic Emission) signals, while cutting stainless steel by end mill on the machining center. The results of this study were that RMSAE tends to increase linearly along with the increase of the cutting speed, and it was more sensitive to depth of cut than to the variation of feed rate at the same cutting conditions, and RMSAE increases around 0.21㎜ flank wear hereby AE-HIT also increases. AE signals depend upon tool wear and fracture from the above results. Therefore, the AE signals can be utilized in order to monitor the tool condition.
윤종학,여만구,김동성,이호영 서울産業大學校 1995 논문집 Vol.42 No.1
This study is focused on the prediction of an appropriate tool life by clarifying the correlation between progressive tool wear and signals, when cutting SM45C by end mill in machining center. First of all, end mill have a problem that position of sensor sticking because it is revolution tool, I think that it can be gained specific character according to sticking sensor in the vise. Consequently, the following results have obtained: 1. Each cutting speed of feed rate over 0.1mm had a tendency to increase linearly according to the RMS. 2. The level of AE signal at the same cutting area was more sensitive to depth of cut than the variation of feed rate. 3. In the range of cutting during about 75min at cutting speed 27m/min flank wear turns up about 0.21mm, about 0.29mm in the case of about 65min at 33m/min, hereby RMS increased rapidly at 0.2mm flank wear, also AE-HIT and CUM-CNTS.
윤종학,여만구,김상헌 한국공작기계학회 1996 한국생산제조학회지 Vol.5 No.3
This study is focused on the prediction of appropriate tool life by clarifying the correlation between progressive tool wear and AE(Acoustic Emission) signals, while cutting stainless steel by end mill on te machining center. The results of this study were that RMSAE tends to increase linearly along with the incrase of the cutting speed, and it was more sensitive to depth of cut than to the variation of feed rate at the same cutting conditions, and RMSAE increases around 0.21mm flank wear hereby AE-HIT also increases. AE signals depend upon tool wear and fracture from the above results. Therefore, the AE signals can be utilized in order to monitor the tool condition.
音響放出에 의한 CNC선삭에서의 工具磨耗 감시에 관한 연구
윤종학,김동성,여만구,이호영,차상회 서울産業大學校 1994 논문집 Vol.40 No.1
It is well-known that Acoustic Emission(AE) is the emission of elastic stress wave resulting from the plastic deformation and fracture of materials. This study is focused on the prediction of appropriate tool life by clarifying the correlation between progressive tool wear and AE signal, when cutting SM45C by cermet inserted tip in CNC lathe. consequently , the following results have been obtained: 1. RMSΑΕ, AE-HITs and CUM-CNTs had a tendency to increase linearly according to the cutting speed. 2. The lebel of AE signal at the same cutting area was more sensitive to depth of cut than the variety of feed rate. 3. In the range of cutting speed 150∼250m/min, RMSΑΕ increased rapidly at 205㎛ frank wear and at that moment, AE-HIT, CUM-CNTS showed the same tendency. And after progressive frank wear appeared 205㎛, it was seemed that chattering and abnormal cut begin. As AE signal shows tendency of dependence on tool wear like this, the possibility that AE signal can do In-process momitoring the condition of tool can be suggested.