간행물
한국기계기술학회지 KCI 등재 Journal of the Korean Society of Mechanical Technology 韓國機械技術學會誌
- 발행기관 한국기계기술학회
- 자료유형 학술지
- 간기 격월간
- ISSN 1229-604X (Print)2092-0385 (Online)
- 수록기간 1999 ~ 2024
- 주제분류 공학 > 기계공학 공학 분류의 다른 간행물
- 십진분류KDC 550DDC 620
권호리스트/논문검색
제22권 제2호 (2020년 4월) 29건
21.
2020.04
구독 인증기관 무료, 개인회원 유료
In this study, two types of cyclone separators containing a structure of prevention underflow and a cyclone separator without the structure were analyzed by computational fluid technique. The pressure loss was increased by increasing the inlet velocity from 8m/s to 28m/s, and the velocity and pressure were compared through five cross sections in the vortex finder. Also, the velocity and the pressure contour in the central section were compared. It can be seen that the performance reduction of the cyclone separator by the prevention structure is related to the distance to the vortex finder inlet rather than the effect of the diameter of the structure.
4,000원
22.
2020.04
구독 인증기관 무료, 개인회원 유료
The current domestic policy flow towards nuclear decommissioning have difficult maintaining existing nuclear technologies and capabilities. Knowledge management has become an important project management execution process. The decommissioning research department of the Korea Atomic Energy Research Institute, which conducts decommissioning research and technology development, also attempted to develop a decommissioning project management information system using this knowledge management method. The decommissioning project management information system consisted of scope management, configuration management, organization and manpower management, schedule management, cost management, risk management, and stakeholder management. In this paper, we developed a document management system to perform the decommissioning of nuclear power plants in the process of constructing a project management system for dismantling nuclear facilities. The decommissioning project management system will be completed in stages by linking the history management platform and the process optimization platform based on the document management system.
4,000원
23.
2020.04
구독 인증기관 무료, 개인회원 유료
In this study, the deformation of friction stir welding on the aluminum battery housing material(AL6063-T5) applied to the electric vehicle was effectively predicted through experiments and numerical simulations. The temperature data were measured during the friction stir welding experiment, and the numerical simulation was carried out using the experimental temperature data. In the heat transfer analysis, the temperature distribution of the structure over time was calculated using the Reynolds equation. The final friction stir welding deformation was calculated by performing the structural analysis using the calculated temperature distribution data over time. The thermal elasto-plastic analysis was performed according to the friction stir welding process conditions and the welding sequences. Finally, the optimum welding condition was derived that the welding speed is 1000 mm/min and the rotation speed of the tool is 2000 RPM.
4,000원
24.
2020.04
구독 인증기관 무료, 개인회원 유료
Unlike wheeled vehicles, tracked armored vehicles require a highly developed transmission technology since the transmission has to not only shift gears but also steer and brake the heavy ground weapon system precisely. Even though weapons systems including the K00 Infantry Fighting Vehicle (IFV) have recently been developed with domestic technology, it is true that many core parts in the systems are still being imported. In this paper localization process of the accumulator which is one of the most important hydraulic parts in the K00 transmission is introduced. In order to determine design variables such as operating pressure we analyzed torque characteristics of the transmission and calculated spring constant by disassembling the original accumulator. And tests such as durability, safety, etc. were conducted to assure the validation of the development. We expect that the process of reverse engineering we adopted will be helpful to localize similar hydraulic parts.
4,000원
25.
2020.04
구독 인증기관 무료, 개인회원 유료
EMI(Electro Magnetic Interference) is a very important factor to consider in electronic equipment. For EMI coating, it is applied to the sputtering electronic equipment housing made by PEEK. The question arises that there may be physical changes in the PEEK material due to heat generated during sputtering. During sputtering inside the chamber, the degree of temperature due to the heat was measured indirectly, and characteristics such as bending capacity, tensile strength, impact strength, flexural strength were measured to understand physical changes. Tensile strength and the flexural strength increased by 14.5 to 18 compared to the base group. And the impact strength of the un-notched specimens was increased. Overall, there has been no change in the physical properties of PEEK due to heat generated during sputtering deposition.
4,000원
26.
2020.04
구독 인증기관 무료, 개인회원 유료
Recently, the use of non-ferrous metals has been increasing to lighten the weight of automobiles and parts. In particular, demand for non-ferrous alloy materials such as aluminum alloys and magnesium alloys is increasing. The purpose of this study is to calculate the optimization process of friction stir welding by using different materials of AA5052 and AA6061. By analyzing the reaction value of tensile strength and elongation by full factorial design and Custom Design Methodology. In other words, we analyzed the optimization process according to rotation speed, feed rate, tool angle and tool shape. In conclusion, the optimal process for tensile strength was achieved by using a tool with a rotation speed of 900 RPM, feed rate of 270, tool angle of 2.5° and a triangle tool. and The rotation speed was 1003 RPM, the feed rate was 314.5, tool angle of 1° and a triangle tool, it was able to get the maximum value of elongation when using a tool of the form.
4,000원
27.
2020.04
구독 인증기관 무료, 개인회원 유료
The molybdenum cup and molybdenum pin, which are the main materials of the molybdenum electrode used for the LCD BLU CCFL electrode, have not been developed in Japan and all of them are imported and used from Japan, is giving a competitive burden. In this research, to develop the manufacturing technology of molybdenum pin used for CCFL electrode of LCD BLU, development of linear processing technology, development of molybdenum wire surface treatment technology, development of wire cutting technology, production of molybdenum pin, design and fabrication of JIG and Fixture for inspection, molybdenum pin prototyping and analysis, and development of 100% molybdenum pin inspection technology. In this paper, especially, research on linear processing technology is treated.
4,000원
28.
2020.04
구독 인증기관 무료, 개인회원 유료
In this paper, internal and external flow analysis of nozzle for a automatic bike washing machine was performed using Ansys Fluent, by varying nozzle injection pressure and angle. The pressure and velocity distributions generated at the nozzle outlet from internal flow analysis were applied for inlet condition of the external flow analysis of the nozzle. As a criterion for the cleaning efficiency, the shear stress condition provided by EHEDG[5] was used and an area of shear stress of 3 Pa or more according to the spray angle and pressure was compared. It is expected that the results of this paper will be applied to the development of automatic contactless bike washing nozzle.
4,000원
29.
2020.04
구독 인증기관 무료, 개인회원 유료
This study is to investigate the cause of the malfunction of the ground tracked combat vehicle rotating roller and set future direction of improvement. The integrity of the initially used plate and rotating roller was evaluated. As evaluation methods, mechanical property test, radiographic test and size checking test were performed. PA66, PA12, PET, and POM were selected among polymer materials and tested for water absorption rates. Through mechanical property test and radiographic test, the materials used initially were identified to be sound. In the evaluation of the selected four polymer materials, it was confirmed that the PET was excellent in the mechanical properties and the water absorption rate. PET is excellent in mechanical properties and water absorption.
4,000원
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