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볼엔드밀에 의한 정삭에서 절삭속도와 절삭방향에 따른 표면거칠기의 변화
박재율(Jae-Yul Park) 산업기술교육훈련학회 2011 산업기술연구논문지 (JITR) Vol.16 No.4
According to the development of CNC machine and CAD/CAM technology for die and mould manufacturing, many processes are being automated. It is very important to get the high precision of surface roughness to decrease a time of last machining. In this study, for the robust mechanical structure with SM20C a carbide ball end mill according to the change of cutting speed, cutting in the direction of many by finishing was to obtain the best surface roughness. The surface roughness of tool path direction is better for up-cutting than down-cutting and represents a good result in average for downward cutting than upward cutting.
거대한 단발성 측경부 종물로 나타난 전이성 갑상선암 1례
성낙관(Nak Kwan Sung),김광훈(Kwang Hoon Kim),박재율(Jae Yul Park),손진호(Jin Ho Sohn) 대한두경부종양학회 1999 대한두경부 종양학회지 Vol.15 No.1
We experienced a case of the papillary thyroid carcinoma seen as a huge solid lateral neck mass. The mass grew very slowly over the period of 30years up to 10cm in diameter while relatively well sparing the surrounding tissues. Physical examinations, CT scan, and fine needle aspiration cytology did not reveal any strong suggestions for evidence of malignancy. But it was pathologically diagnosed as metastatic thyroid carcinoma by excisional biopsy. We emphasize that for a large solitary neck mass which persists for several decades, head and neck surgeons should always keep in mind the possibility of metastasis from the malignancy of thyroid gland.