폐FRP로부터 친환경적 유리섬유 추출 공정 개발

尹救永 弘益大學校 産業技術硏究所 2005 産業技術 Vol.15 No.-

The trend of using FRP (Fiber Reinforced Plastics) that range of high mechanical strength and corrosion resistivity and superior molding is now widening. But FRP has a serious problem to be used as structure stuff nowadays. An annual wastes of FRP in Korea are more than 100,000 tons, but it is believed that the most of waste are been abolished without the appropriate treatment. It is fact that most of FRP wastes are depended on incineration or reclamation. Because it is made up of reinforced fiber glass, it is very difficult to break into pieces. By the disposing of waste FRP this way, it also occurs secondary problem such as air pollution. For these reasons, the research of FRP recycling field is now focusing on FRC(fiber reinforced concrete) that use disposed FRP. This study is to show a process of manufacturing and practical using for FRC from the waste FRP.

FRP재활용을 위한 분쇄기 설계

尹救永 홍익대학교 산업기술연구소 1999 産業技術 Vol.9 No.-

The use and advantages of FRP(fiber reinforced plastics, or fiberglass) as structural materials and their acceptance by major industries, particularly the marine industry, are very popular trend in nowadays. Nevertheless the FRP recycling is not much discussed nor illustrated because of the disadvantages in the mechanical efficiency and the net profit to crush or shred. Therefore technical status of basic materials, production and engineering experience and empirical data in the recycling of FRP crusher that is especially good for the marine industries which have to recycle the FRP boats till next century.

학부 중심 대학 기계공학과 공학인증 이수체계 사례

윤구영 대한기계학회 2014 대한기계학회 춘추학술대회 Vol.2014 No.6

기계정보공학의 학문적 개념화를 위한 연구

尹救永 홍익대학교 산업기술연구소 2002 産業技術 Vol.12 No.-

Our work is defining the standards for next generation computer integrated manufacturing systems. It is also trying to support our manufacturing process : IT consulting, engineered software solutions, project management, process analysis and ongoing project and product support, reliability based optimum design for manufacturing systems. Our methodology is going to increase our manufacturing flexibility and efficiency. It is our success that will continue to make us a leader in engineered interdisciplinary study. Reliability based optimum design for manufacturing systems is one of the most demanding field by manufactures. The manufacturing cost is the most dominant factor for company. Nevertheless the object is highly asked to be solved, the answer is not a simple one at all. Because the production process is usually very sophisticated and the production cost is combined with several part production process. The Monte Carlo Simulation method for revealing the relation between the cost of failure and the control of that is adopted. The real process plan from a battery manufacturing company is successfully applied into that method. Therefore there is a remarkable success to increase the productivity and reduce the control of failure. Design of the new factory information system with the latest web technology is utilizing the web and the latest in technology, we can monitor our system and generate reports from home. It is also developing web client applications and supporting web products right now to make our life a little easier. Utilizing state of the art enabling technologies. Our methodology is going to increase our manufacturing flexibility and efficiency. It is our success that will continue to make us a leader in newly engineered study.

신뢰성 향상을 위한 부품관리 연구

尹救永 홍익대학교 산업기술연구소 2001 産業技術 Vol.11 No.-

Reliability based optimum design for manufacturing systems is one of the most demanding field by manufactures. The manufacturing cost is the most dominant factor for company. Nevertheless the object is highly asked to be solved, the answer is not a simple one at all. Because the production process is usually very sophisticated and the production cost is combined with several part production process. Therefor traditional approach is mainly trying to reduce the failure vrate, but that is very costly method. Also that method hasn't know the relation between the cost of improving productivity and the cost of the control of failure.Here we used the Monte Carlo Simulation method for revealing the relation between the cost of failure and the control of that. We adopted the real process plan from a battery manufacturing company. Then the method is successfully applied to that process. Therefore We have very remarkable success to increase the productivity and reduce the control of failure. This simulation can be easily introduced to other manufacturing process and field These kinds of research will be an important area to the future work. Our methodology is going to increase our manufacturing flexibility and efficiency. It is our success that will continue to make us a leader in newly engineered study.

폐FRP로부터 친환경적 유리섬유 추출 공정 개발

尹救永 弘益大學校 産業技術硏究所 2004 産業技術 Vol.14 No.-

The FRP(fiber-reinforced plastic) is one of the best composite material which has advantages in excellent durability, corrosion-resistant, plasticity, used for important fields with the focus material. But FRP has a tendency to be used as structure stuff nowadays. An annual wastes of FRP in Korea are more than 100,000 tons, but it estimates the almost about 100,000 tons are been abolished. It is fact that most of FRP wastes are depended on incineration or reclamation. Because it is made up of reinforced fiber like glass, it is difficult to break into pieces. By disposing of useless FRP this way, it occurs secondary problem such as environmental pollution. To solve the problems, research on recycling method has been carried out, recycling FRP wastes by grinding into powder, it can be applied to lightweight plastic or intense building materials. Accordingly, the aim of this research is to develop actual manufacturing technique about the cement reinforcement fiber which is made from FRP wastes.

동력전달장치 내의 저소음을 위한 치차설계

尹救永,朴旺濬 홍익대학교 산업기술연구소 1995 産業技術 Vol.5 No.-

기어 소음에 관한 연구는 최근에 와서 가장 많은 연구활동이 이루어지고 있는 분야이다 기어운동의 정확하고도 정밀한 해석 기어시스템의 적절한 수학적 모델링 그리고 기어의 진동요인 분석은 저소음 및 저진동 기어설계의 중요한 요소이다. 이 연구는 기어소음연구의 현황과 방향을 포함하여 저소음 기어설계와 T.E.(Trans mission Error)의 상관 관계 또 기어소음 예측의 핵심변수와 기계축음을 위한 실질적 방법도 조사하고 있다. 또 새로운 방법으로 기어 치 형상의 수정으로 Cubic spline을 사용하였다. 기어 치형상은 인벌류트 모양을 하고 있는 것으로 가정하였는데 작용선상의 모든 점에의 conjugate 운동을 확실히 하기 위해서는 그의 필요성이 절실히 요구되기 때문이다. 새로운 기어형상은 기어 진동과 소음 특성의 개선을 위해 일정한 정적 T.E.의 유지에 기초를 둔다. 기어의 T.E.의 변동폭의 최소화가 이 논문에서의 주요방법이다

Developing a General Recycling Method of FRP Boats

윤구영,Yoon, Koo-Young The Korean Society for Marine Environment and Ener 2009 한국해양환경·에너지학회지 Vol.18 No.1

FRP선박의 폐처리와 재활용 연구는 지난 10여 년간 많은 발전이 이루어져 왔다. 특히 해상용과는 달리 폐기물의 투기나 방치가 매우 어려운 육상용 폐FRP의 재활용 방법과 기술의 발전에 기인한 결과이기도하다. 따라서 가장 많은 폐FRP 선박의 재처리는 육상용의 처리공정, 즉 파쇄와 분쇄 공정을 거친 후 수지류와 유리섬유류로 분리하여 재활용 또는 지정폐기물로 처리하게 되었다. 지난 연구를 통하여 처리공정 운영 측면에서 보다 경제적이며 2차 처리공정(분쇄 후 공정)에 유용한 시스템을 개발하였다. 그러나 다년간의 실험실규모의 처리시스템 운영을 통하여 두 가지의 개선점이 발견되었다. 첫째는 단순 용융하여 활용하던 유리섬유의 형상(폭과 넓이)의 다양화가 필요하게 되었으며, 두 번째 문제로는 수중 파쇄 공정 도입을 통하여 분진을 억제하였으나 시스템 상부(파쇄전 공정)를 통한 분진유발로 인하여 작업성의 저하가 발생한다는 것이다. 우선 유리섬유의 형상변화는 파쇄공정 중 칼날의 변화를 통하여 섬유 형태뿐만 아니라 chip형태(직사각형)로 박리할 수 있게 되었으며 파쇄공정의 상부에 cyclone분류기를 설치하여 유리가루와 수지가루를 분류하여 재활용하게 되었다. 아울러 작업환경의 청정성도 유지하게 되었다. 또한 유리 chip을 활용한 노 콘크리트 제품의 강도 실험결과 매우 우수한 결과를 보여주고 있으므로 앞으로의 폐FRP 선박의 재활용 분야의 다양성을 기대할 수 있을 것이다. For several decades, many researchers have been involved in developing recycling methods for FRP boats. There are four basic classes of recycling covered in the literature. Despite of environmental problems(safety hazards), mechanical recycling of FRP boats, which involves shredding and grinding of the scrap FRP, is one of the simpler and more technically proven methods than incineration, reclamation or chemical ones. Because FRP is made up of reinforced fiber glass, it is very difficult to break into pieces. It also leads to secondary problem in recycling process, such as air pollution and unacceptable shredding noise level. Another serious problem of mechanical FRP recycling is very limited reusable applications for the residue. This study is to propose a new and efficient method which is more wide range applications and environment friendly waste FRP regenerating system. New system is added with the cyclone sorting machine for airborne pollutions and modified cutting system for several glass fiber chips sizes. It also has shown the FRP chip fiber-reinforced concrete and fiber-reinforced secondary concrete applications with the waste FRP boat to be more eligible than existing recycling method.

Developing a Study on the Extracting Method of Laminated Glass Fiber from FRP Boats

윤구영,Yoon, Koo-Young The Korean Society for Marine Environment and Ener 2009 한국해양환경·에너지학회지 Vol.18 No.1

폐FRP 선박을 재활용하는 기술은 많은 발전을 이루어 왔으며 최근에는 가장 재활용도가 적은 부분인 유리섬유의 고부가치화 재활용이 특히 주목받고 있다. 폐FRP 선박의 재처리 과정에서 추출된 유리섬유는 피막된 수지 성분의 내화학성으로 인하여 섬유보강재로서 사용 가능하다는 것이 보고되었다. 그러나 섬유보강재(laminated glass fiber reinforced material)를 추출하는 공정의 효율성과 경제성의 재고는 개선되어여할 과제이다. 본 연구는 다층구조인 FRP로부터 면포층(roving cloth layer)을 보다 효과적으로 박리할 수 있는 방법을 제시하여 추출공정의 최적화를 도모하고자한다. 새로운 추출공정에서 생산된 섬유보강재를 활용한 섬유강화콘크리트(Fiber Reinforced Concrete, FRC)의 강성은 매우 우수한 것으로 관찰되었다. There is several ways of recycling methods for waste FRP boats. The main one is mechanical recycling that is one of the simple and technically proven methods. It recently has been reported that FRP can be recycled by separating into laminated glass fiber layers instead of crushing into powder. Even though the mechanical recycling is a good way for the eligibility of laminated glass fiber reinforced material, the system should have another option which can collect resin of FRP. Because the resin is still very useful renewable energy source, that cannot be discarded, But FRP is made up of laminated glass fiber(roving cloth layer) which is fire retardant substances and very hard to break into each layer. Due to the high cost of fossil energy the waste plastics should be regenerated to the source of renewable energy. Laminated glass fiber which is recyclable in a very limited way, is currently a serious barrier to waste FRP boat regenerating. This study is to propose a new extracting method which is efficient and environment friendly FRP waste regenerating system. The recycled glass fiber which is obtained by the separation of the roving layer from FRP waste has been found to be useful for concrete(FRC) products or concrete(FRC) structures as fiber reinforced material. And it can be successively applied to renewable energy applications using the waste resins of FRP residue without laminated glass fiber.

기어 시스템의 동적거동 해석

尹救永,朴旺濬 홍익대학교 산업기술연구소 1996 産業技術 Vol.6 No.-

The area of gear dynamics has recently been the focus of many studies. The proper kinematic and geometric design of gears, the mathematical modeling of gear system are essential for a good design. This work present a gear design for reducing noise, practical approaches, and Win95 based simulation program that using basic design variables. Especially this program enables dynamic analysis based on G.U.I. A new tooth profile modification is proposed for reduction vibration and noise of involute gears. The method is based on the use of cubic spline curves. The tooth profile is constrained to assume an involute shape during the loaded operation. Thus the new gear profile assures conjugate motion at all points along the ling of action. The new profile is found to result in a more uniform static transmission error compared to not only standard involute profile but also modificated profile thereby contributing to the improvement of vibration and noise characteristics of the gear. A dynamic analysis of the gear drive with the involute tooth and the modified tooth profile(using cubic splines) is performed to establish the fact that a reduction in the transmission error reduces the gear vibration and noise due to smaller dynamic tooth loads during a meshing cycle. For this, first the tooth deformation is found and then the tooth dynamic load is determined for all resonable speeds. A parameter study in also conducted to establish the superiority of the cubic spline(C.S) based gear profile over the involute profile a well as those based on the use of linear and parabolic tip reliefs.