http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
열적거동을 고려한 고속 내장형 스핀들 최적 설계에 관한 연구
박수성(Su Seong Park),정원지(Won Ji Chung),김수태(Da Woon Jung),정다운(Soo Tae Kim) 한국생산제조학회 2010 한국생산제조시스템학회 학술발표대회 논문집 Vol.2010 No.10
The thermal deformation of machine tool spindle influences the performance of the manufacturing systems for precision products. According to previous studies, major factors that will affect the stiffness of the spindle include spindle diameter, elasticity of the material, bearing stiffness and bearing span. It is difficult to change spindle diameter or elasticity of the material. but change of bearing position is easy in the given range compared to other factors. In this paper, we will find a solution to minimize thermal deformation through Change the span of the bearing.
박수성(Su-Seong Park),정원지(Won-Ji Chung),신오철(O-Chol Shin),김재민(Jae-Mim Kim) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
The clutch transmit engine power to the transmission. Accordingly clutch is a necessary part in a car. In case of Manual clutch, the driver handle clutch directly. This is why we are getting into research for clutch characteristic measurement system. But nowadays clutch characteristics measurement system is something yet to development in Korea. Therefor in this research, developing portable test device and Algorithm. It's easy to sensor installation and measurement program operation than existing test system. This paper is composed of two parts: (1)developing clutch characteristic measurement system; (2) Testing performance verification of clutch characteristic measurement system.
주축의 열변위를 고려한 초고속 스핀들의 베어링 위치 선정
박수성(Su Seong Park),정원지(Won Jee Chung) 한국생산제조학회 2011 한국생산제조학회지 Vol.20 No.6
The thermal deformation of machine tool spindle influences the performance of the manufacturing systems for precision products. According to previous studies, major factors that will affect the stiffness of the spindle include spindle diameter, elasticity of the material, bearing stiffness and bearing span. It is difficult to change spindle diameter or elasticity of the material. but change of bearing position is easy in the given range compared to other factors. In this paper, we will find a solution to minimize thermal deformation through Change the span of the bearing.
열적거동을 고려한 고속 내장형 스핀들 최적 설계에 관한 연구
박수성(Su Seong Park),정원지(Won Ji Chung),김수태(Da Woon Jung),정다운(Soo Tae Kim) 한국생산제조학회 2010 한국공작기계학회 추계학술대회논문집 Vol.2010 No.-
The thermal deformation of machine tool spindle influences the performance of the manufacturing systems for precision products. According to previous studies, major factors that will affect the stiffness of the spindle include spindle diameter, elasticity of the material, bearing stiffness and bearing span. It is difficult to change spindle diameter or elasticity of the material. but change of bearing position is easy in the given range compared to other factors. In this paper, we will find a solution to minimize thermal deformation through Change the span of the bearing.
난소절제로 유도된 골다공증 흰쥐에서 implant 주위 조직 반응에 관한 실험적 연구
조인호,김종여,박수성,박종섭,임헌송,Cho, In-Ho,Kim, Jong-Yeo,Park, Su-Seong,Park, Jong-Sup,Lim, Heon-Song 대한치과보철학회 1998 대한치과보철학회지 Vol.36 No.1
This study was designed to investigate the peri-implant tissue reaction in ovariectomized osteoporotic female rats, and to evaluate effects of estrogen, calcitonin, parathyroid hormone on the bone - implant interface in osteoporotic rats. 120 Sprague - Dawley rats were used in this experiments. Osteoporosis was induced by bilateral ovariectomy. They were divided 5 groups : sham-operated control group(Sham), ovariectomized group (OVX), OVX and estrogen treated group (OVX+E), OVX and PTH treated group (OVX+PTH), and OVX and calcitonin treated group (OVX+CT). Eight weeks after ovariectomy, two titanium screw implants were inserted into the left tibia of each rat. Eight weeks after the insertion of the implants, the periotest values (PTV) of implant were examined, and the rats were sacrificed, and examined the reaction of bone tissue surrounding the implant both histologically and histomorphometrically. The bone density and ash weight of opposite right tibia were examined. Over 40 rats were fractured on left tibia that was implant inserted. On histologically finding, all groups were osseointegrated well, especially in OVX+PTH group. In OVX group, tibial cortical bone showed many large harversian canal and microfracture lines. The OVX+PTH group showed the lowest mean PTV (-2.33) (p<0.05), and the hightest mean bone - implant contact percentage (89%) (p>0.05). But the OVX+CT group showed the highest mean bone density ($5.45mg/cm^3$) and ash weight (56.12%) (p<0.05). The results indicate that PTH treatment enhances osseointegration of implant in OVX rats, and CT treatment depresses bone turnover and prevent the development of osteopenia in OVX rats.