Journal of the Korea Institute of Military Science and Technology
Recently, the R&D of weapon systems has been strengthened in terms of economic cost management th... more Recently, the R&D of weapon systems has been strengthened in terms of economic cost management throughout the entire life cycle from performance. This study proposes the method for setting the optimal maintenance concept based on RAM-C in weapon system acquisition stage by calculating the operation & maintenance cost as well as reliability, availability, and maintainability. First, we design a simulation model for analysis of weapon system logistic supportability. In addition, information such as weapon system Part Breakdown Structure, operation & maintenance system, cost, and etc for simulation analysis, is applied. Based on the obtained simulation results, the optimal plan is selected among alternatives designed with various maintenance concepts through normalization and weight setting. It is expected to be of technical help in the application of RAM-C in the weapon system acquisition stage.
International Journal of Precision Engineering and Manufacturing, 2014
Fine surface finish of micro features processed by micro EDM is difficult due to small feature si... more Fine surface finish of micro features processed by micro EDM is difficult due to small feature size. In this work, we investigated electrochemical finishing process after micro EDM. The product shape was machined by micro EDM, and the surface was finished by electrochemical process. For both processes, deionized water was only used as dielectric fluid for EDM and electrolyte for finishing. Surface formation characteristics during finishing and side gap increase were analyzed according to machining conditions. In addition, surface roughness and hardness were measured to compare three cases of surface processed by micro EDM in deionized water, by micro EDM in kerosene, and by finishing in deionized water after micro EDM, respectively. Micro grooves and pockets were fabricated by micro EDM milling and electrochemical finish. In the case of drilling, electrochemical finish in deionized water not only finished inner surface of the holes but also expanded entrance and exit hole size. Using this phenomenon, micro drawing die was fabricated by controlling finishing conditions.
Journal of the Korea Institute of Military Science and Technology
Recently, the R&D of weapon systems has been strengthened in terms of economic cost management th... more Recently, the R&D of weapon systems has been strengthened in terms of economic cost management throughout the entire life cycle from performance. This study proposes the method for setting the optimal maintenance concept based on RAM-C in weapon system acquisition stage by calculating the operation & maintenance cost as well as reliability, availability, and maintainability. First, we design a simulation model for analysis of weapon system logistic supportability. In addition, information such as weapon system Part Breakdown Structure, operation & maintenance system, cost, and etc for simulation analysis, is applied. Based on the obtained simulation results, the optimal plan is selected among alternatives designed with various maintenance concepts through normalization and weight setting. It is expected to be of technical help in the application of RAM-C in the weapon system acquisition stage.
International Journal of Precision Engineering and Manufacturing, 2014
Fine surface finish of micro features processed by micro EDM is difficult due to small feature si... more Fine surface finish of micro features processed by micro EDM is difficult due to small feature size. In this work, we investigated electrochemical finishing process after micro EDM. The product shape was machined by micro EDM, and the surface was finished by electrochemical process. For both processes, deionized water was only used as dielectric fluid for EDM and electrolyte for finishing. Surface formation characteristics during finishing and side gap increase were analyzed according to machining conditions. In addition, surface roughness and hardness were measured to compare three cases of surface processed by micro EDM in deionized water, by micro EDM in kerosene, and by finishing in deionized water after micro EDM, respectively. Micro grooves and pockets were fabricated by micro EDM milling and electrochemical finish. In the case of drilling, electrochemical finish in deionized water not only finished inner surface of the holes but also expanded entrance and exit hole size. Using this phenomenon, micro drawing die was fabricated by controlling finishing conditions.
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Papers by Jun Jeong