http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
초음파 폴리싱 가공에 따른 세라믹재료의 표면거칠기에 관한 연구
문홍현,박병규,이찬호,김성청,Moon, Hong-Hyun,Park, Byung-Gyu,Lee, Chan-Ho,KIm, Sung-Chung 한국기계가공학회 2003 한국기계가공학회지 Vol.2 No.1
The ultrasonic polishing machine was developed to get super finishing that consist of machine part that can rotate and travel the main shaft with power 1.5kW, ultrasonic generator with frequency 20kHz. By using this machine we were investigated the characteristics of ultrasonic polishing for three different ceramics, and so could be obtained following results. First, we could be obtained the excellent surface for hard-ta-difficult cutting materials. Second, the effect of surface roughness for the feed rate could be shown that the more the feed rate Increases, the more the value of surface roughness increases. Third, owing to the characteristics being progressed brittle fracture in $Al_2O_3$ polishing with this machine, the value of surface roughness is larger than other ceramics. Forth, because the ultrasonic polishing can be smoother than the existing grinding in discharging the chips, it could be possible to improve the surface roughness about up to 15%.
혼 해석을 통한 초음파 폴리싱 시스템의 개발 및 연마특성
박병규,김성청,문홍현,이찬호,강연식 한국공작기계학회 2004 한국생산제조학회지 Vol.13 No.3
We have developed and manufactured an experimental ultrasonic polishing machine with frequency of 20kHz at the power of vibration 1.7kw for effective ultrasonic polishing in processing of high hardness material. Design of the horn is performed by the FEM analysis. The following, conclusions were empirically deduced through experimental results to the major elements which affect the surface roughness during the ultrasonic process by following the experimental plans. The ultrasonic polishing machine has been developed in parts of structure part, ultrasonic generator, vibrator. We were able to process the high hardness material without difficulty as a result of ultrasonic polishing by utilizing the groove added step-type horn. Through analyzing by applying the experimental plans, the rotating speed of the horn was determined to be the major factor in influencing the surface roughness. In the case of ceramic, wafer, we were able to obtain good surface roughness when the feed rate and the ultrasonic output were higher. Because the load on slurry particle increases when the ultrasonic output is higher, the processed becomes worse in the case of optical glass.