• Journal of the Korean Society for Precision Engineering
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• v.15 no.5
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• pp.137-144
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• 1998

A mathematical model for investigating the form generation mechanism in the centerless thrufeed grinding process is described. The length of the contact line and the magnitude of the grinding force between the grinding wheel and workpieces vary with the change of the axial location of the current workpiece during grinding. Thus, a new coordinate system and a grinding force curve of previous and/or following workpieces are introduced to treat the axial motion. Experiments and computer simulations were carried out using three types of cylindrical workpiece shapes. To validate this model. simulation results are compared with the experimental results.

• Journal of the Korean Society for Precision Engineering
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• v.22 no.2
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• pp.172-179
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• 2005

A high-precision centerless grinding machine has been recognized as a core equipment performing the finish outer-diameter grinding process of ferrules which are widely used as fiber optic connectors. In this study, in order to realize the high-precision centerless grinding machine, the structural characteristic analysis and evaluation are carried out on the virtual prototype consisted of the steel bed, hydrostatic GW and RW spindle systems, hydrostatic RW feed mechanism, RW swivel mechanism, and on-machine GW and RW dressers. The loop stiffnesses of centerless grinding machine are estimated based on the relative deformations between GW and RW caused by the grinding forces. And the simulated results illustrate that the concrete-filled bed has the considerable effect on the improvement of the structural stiffness of centerless grinding machine.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2002.10a
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• pp.61-64
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• 2002

In this study, It was designed and developed optimal rotary dressing system of centerless grinding using for ferrule machining. Dressing shaft's dropping is calculated by Finite Element Method, and bearing 7206ADB, 7005ADB is selected. Dressing wheel $GC\Box \;200\Box\; G\Box\; m\Box\; V-100^*25^*16$ is selected by pre-research. Also Motor, pulley, belt are selected, 0.4Kw-60Hz, 48.2 mm diameter, 2-5M-730 type, each.

• Proceedings of the KSME Conference
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• 2004.04a
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• pp.1105-1108
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• 2004

As recently optical communication industry is developed, request of optical communication part is increased. Ferrule is very important part which determines transmission efficiency and quality of information in the optical communication part. Most of ferrule processes are grinding which request high processing precision. The ultra precision centerless grinding machine for ferrule grinding was designed. The centerless grinding machine is composed of the high damping bed, grinding wheel spindle unit, regulating wheel spindle unit, feeding table and dressing unit. Reliability prediction was very important for the high quality design. In this study, centerless grinding machine was predicted reliability.

• 건강소식
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• v.34 no.4
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• pp.18-23
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• 2010

훌쩍거리고 킁킁거리는 사람들이 늘어만 가는 환절기. 대수롭진 않게 넘어갈 수도 있지만 무심코 넘기기에는 코와 관련된 각종 절환들은 불편함을 넘어 생활에 만만치 않은 장벽으로 남는 경우도 있다. 각종 코 질환, 과연 심각하지 않다고 그냥 가볍게 지나쳐도 되는 걸까?

• 건강소식
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• v.37 no.7
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• pp.8-11
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• 2013

바르게 아는 것이 중요하다 말한다. 당연히 우리가 무심코 마셔왔던 '물'에 관해서도 올바른 정보를 아는 것이 중요하다. 세 살 버릇이 여든까지 간다는 말이 있다. 물 마시는 일에도 바른 습관을 들이는 것이 좋다. 물 바르게 마시고 건강한 삶을 실천해보자.

• Journal of the Korean Society for Precision Engineering
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• v.20 no.5
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• pp.22-28
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• 2003

• 건강소식
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• v.37 no.12
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• pp.30-31
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• 2013

열심히 일한 당신, 무심코 훑어본 허벅지와 엉덩이에 살이 불어나 있다면? 추운 겨울이 오면 생각보다 많은 사무직 여성이 자신도 모르게 불어난 허벅지와 엉덩이 살 때문에 고민한다. 식이요법을 병행해도 쉽게 빠지지 않는 허벅지와 엉덩이 살. 이유가 있을까?

• 주택과사람들
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• s.190
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• pp.40-43
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• 2006

미술 작품을 감상하러 꼭 미술관이나 박물관까지 갈 필요는 없다. 오늘 호텔에 갈 일이 있다면, 비즈니스 업무를 볼 일이 있다면, 혹은 병원에 갈 일이 있다면, 건물 안에 들어가 잠시 주위를 둘러보라. 거기 당신이 무심히 지나친 적이 있는, 감성을 깨워줄 예술 작품 하나가 있을지도 모른다.

• Journal of the Korean Society for Precision Engineering
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• v.20 no.6
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• pp.11-14
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• 2003