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사승윤,김광래,이원평 韓國工作機械學會 2000 한국생산제조학회지 Vol.9 No.5
The demands for robotic and automatic system are continually increasing in manufacturing fields. There have been many studies to monitor and predict the system, but they have mainly focused upon measuring cutting force, and current of motor spindle, and upon using acoustic sensor, etc. In this study, time series sequence of cutting force was acquired by taking advantage of piezoelectric type tool dynamometer. Radial cutting force was obtained from it and was available for useful observation data. The parameter was estimated using PAA (parameter adaptation algorithm) from observation data. ARMA(auto regressive moving average) model was selected for system model and second order was decided according to parameter estimation. Uncorrelation test was also carried out to verify convergence of parameter.
세라믹 연삭에서 다이아몬드 휠의 수명 판정에 관한 연구
임홍섭,유봉환,소의열,이근상,사승윤 한국공작기계학회 2002 한국공작기계학회 추계학술대회논문집 Vol.2002 No.-
In order to investigate the characteristics of grinding and diamond wheel grinding ceramic materials, grinding resistance, surface roughness of worked surface and image of grinding wheel were acquired using experimental method. Through the experiments, this makes it possible to observe grinding wheel behavior by grinding resistance, surface roughness and cutting edge ratio. In case of Al₂O₃, cutting edge ratio is begger than that of ZrO₂ and Si₃N₄. That’s because Al₂O₃ has a characteristics of low fracture toughness and bending stress.