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다품종 종이용기의 고속 생산을 위한 고장 진단 시스템 개발
김설하(Seolha Kim),장재호(Jaeho Jang),주백석(Baeksuk Chu) 한국기계가공학회 2019 한국기계가공학회지 Vol.18 No.5
Recently, as demand for various paper containers has rapidly grown, it is inevitable that paper cup-forming machines have increased their manufacturing speed. However, the faster manufacturing speed naturally brings more frequent manufacturing failures, which decreases manufacturing efficiency. As such, it is necessary to develop a system that monitors the failures in real time and diagnoses the failure progress in advance. In this research, a paper cup-forming machine diagnosis system was developed. Three major failure targets, paper deviation, temperature failure, and abnormal vibration, which dominantly affect the manufacturing process when they occur, were monitored and diagnosed. To evaluate the developed diagnosis system, extensive experiments were performed with the actual data gathered from the paper cup-forming machine. Furthermore, the desired system validation was obtained. The proposed system is expected to anticipate and prevent serious promising failures in advance and lower the final defect rate considerably.
전산유체역학(CFD)을 통한 지중점적관수 장치에 따른 압력강하 분석
김정식(Jeongsik Kim),김필(Phil Kim),김설하(Seolha Kim),김진현(Jinhyun Kim),엄덕호(Dukho Um),이상훈(Sanghun Lee) 대한기계학회 2021 대한기계학회 춘추학술대회 Vol.2021 No.11
Watering crops inside the soil is more efficient in terms of water saving than outside watering. To resolve this problem, we use the drip irrigation system which is used the Drip irrigation pipe. This system can save water by evenly supplying water directly into the roots of the crops. To determine which shape has good pressure drop, this study compares the two commercial Drip irrigation pipe and analyzes experiment and computational values through CFD. For calculation through CFD, the shape of the Drip irrigation pipe was produced in CAD based on actual measurement and calculated through ANSYS. Experiment used a water pump and was measured every 20 kPa in the range from 100 to 400 kPa.. This paper reports the advantages and disadvantages of both Drip irrigation pipes.