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.

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.

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.

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.

정보화 기술을 이용한 다전공 협동체제 연구

尹救永 홍익대학교 산업기술연구소 2000 産業技術 Vol.10 No.-

Design of the new factory information system with the latest web technology is such a world as finally, no more rushing to the plant in the middle of the night, utilizing the web and the latest in technology, we can monitor our system and generate reports from home. It is also developing web client aptilizing state of the art enabling technologies, It will develop an application for us thaplications and supporting web products right now to make our life a little easier. Ut is totally web compliant. All of the user interface screens and associated data will be made available to us. Our work is defining the standards for next generation computer intergrated manufacturing systems. It is also tring to support our manufacturing process : IT consulting, engineered software solutions, project management, process analysis and ongoing project and product support. 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 interdisciplinery study.

물질내부로부터의 신호에 관한 연구

尹救永 홍익대학교 산업기술연구소 2003 産業技術 Vol.13 No.-

The information(vital body signal or material acoustic emission) from the unknown or undetermined mechanism is some times very valuable but still couldn't be accepted general truth. If we have some other choice for detecting the typical critical situation, those approaches have never been considered. Unfortunately some valued data(information) are the only way to analysis or predict the physical happening(failure). Therefore the realistically appropriate approach is the operatin research which includes optimization, reliability analysis and Statistical method etc. This study is focusing on the mechanism which is trying to communicate very valuable informations to the outside. As an example, advanced manufacturing systems with high speed and intelligence have been developed for the betterment of machining ability. In this case, reliability prediction work with motion characteristic evaluation of sliding cover(C-plate, Bellows, etc) has also important role from design procedure to manufacturing and assembly process. Accordingly in this study, H/W test -bed system for reliability evaluation of sliding cover has been developed to obtain proper reference data for design of new model, prevention trouble (failure mode), and improvement of quality and life cycle extremely for advanced other machinery.

신뢰성을 고려한 캠 시스템의 최적설계

尹救永 홍익대학교 산업기술연구소 1994 産業技術 Vol.4 No.-

The application of minimum norm principle and spline functions and a Monte Carlo simulation approach are used for the reliability based optimum design of cam system. The cubic splines are more convenient and simpler to use compared to general spline functions and also result in smaller peak acceleration and jerk. Also a Monte Carlo simulation approach for the cam system is performed by considering the reliability analysis of a cam design example. On the overall reliability the effect of the different distinction of the random parameters is investigated lately. The paper presents an novel approach for the estimation of the reliability and optimum design of cam mechanism with a numerical example.

새로운 치형을 이용한 헬리컬기어의 저진동화 연구

尹救永,柳承玹 홍익대학교 산업기술연구소 1997 産業技術 Vol.7 No.-

A method of minimizing transmission error in helical gears is presented in this work. Using the concept of optimal modification of the plane of action to generate the new tooth profile, the idea of perfect plane of action of helical gears is introduced. The proposed method constitutes a general tooth correction method and makes the design, unlike other modification schemes presented in the literature. less complex, less sensitive to dynamic factors and retains the involute characteristics. Also the new method proposed in this work permits easier cutting of the tooth profile because of the simplicity of the process.

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.

FRP의 로빙층에서 분리한 유리섬유의 재활용에 관한 연구

尹救永 홍익대학교 산업기술연구소 2006 産業技術 Vol.16 No.-

Since the FRP (Fiber-reinforced plastic) used in manufacturing medium-to-small size ships are usually dumped by being buried or carcinated, several environmental problems have been caused. Therefore instead of dumping recycling has been considered which has to be studied to be more environmental-friendly and higher value-added. We propose to recycle FRP waste without any environmental pollution by physical treatment of the glass fibers obtained from the roving cloth of FRP. The long glass fibers (about 50 mm and afterwards `F fiber`) have been separated from Rving cloth are considered as the future substitute for the building materials by studying the pysical property of fiber reinforced mortar contained F fiber. F fiber showed tensile strength as 2 times as the raw glass fiber and chemical-resistance in 0.1 M NaOH solution as 3 times. It may be due to the remained resin (25 %) which has been used for coagulating the roving cloths and the mat layers in FRP. The mortar containing 2 % (v/v) F fiber results in 34.6 % increment of bending strength after 28 day curing. These results imply that F fiber may be applied to the `fiber reinforced mortar` and furthermore may be a substitute for the other building materials.