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
제24권 제3호 (2022년 6월) 24건
21.
2022.06
구독 인증기관 무료, 개인회원 유료
Equipment used for ships operating in the polar regions, such as icebreakers, should consider countermeasures against freezing. This study performed a structural design that prevents freezing and tolerates thermal stress and wind pressure of the air vent louver heating blades. As boundary conditions for performing the analysis, analysis was performed when the flow rates at the inlet end were 10m/s, 20m/s 30m/s, 40m/s, and 50m/s. As a result of the analysis, if the CNT heating element can maintain the heating performance of 200°C, the blade can maintain the room temperature state except for the end of about 40mm. There are pressure drop between the front and rear of the air vent louver. It can be seen that the allowable wind speed varies depending on the design criteria. As a results, it is required to select an optimal heating temperature to prevent condensation of a blade, optimize the generation of compressive stress by thermal expansion, and trade off the wind pressure and thermal stress according to wind speed.
4,000원
22.
2022.06
구독 인증기관 무료, 개인회원 유료
For this study, we established a system for the CPU cooling performance evaluation and conducted performance tests on air-cooling and water-cooling to understand the effect of the CPU cooling method on performance. For the performance evaluation, the test chamber and water-cooling system were set up, the workload S/W was selected, and a case file was created. In the case of the air-cooling, the CPU temperature is sensitively affected by the outside air temperature, the direction of the board installation, and the influence of the airflow formed around it, and may cause a lot of fluctuations in the CPU temperature. When the water-cooling system was applied, the CPU temperature decreased from 75℃℃ to 37℃ compared to the air-cooled type under the test conditions of 28.5℃ and 3LPM cooling water supply temperature and flow rate. As the CPU clock speed increased due to the decrease in temperature, it was found that the job execution time was reduced by 15~23%. In the future, it is expected that using this performance evaluation environment established through this study will enable us to easily conduct test evaluations for various processors, cooling methods, and changes in operating conditions.
4,200원
23.
2022.06
구독 인증기관 무료, 개인회원 유료
In this study, using a 100mm gauge block in a contact-type three-dimensional measuring machine surface plate, an NPL-type angle measurement, and a steel ruler, the specimen was measured at 0°, 5°, 10°, 20°, 30°, and 40° along the X and Y axes. After setting the measurement conditions, the average value and standard deviation were confirmed by repeating measurements for each yield 10 times. After checking the statistical test value (P) through ANOVA, the correlation between the angle change and the error was checked.
4,000원
24.
2022.06
구독 인증기관 무료, 개인회원 유료
This thesis relates to developing an index drilling automation system that quickly and efficiently processes a hole in a product by a rotating robot arm and transfer devices. Static structural analysis was performed using the ANSYS Mechanical program to evaluate the structural stability of the system. According to the research, the equivalent stress value is low overall, and the minimum safety factor is 4.42, so it seems structurally safe. This system will significantly help improve productivity through unmanned work as it can control and set the drill and index simultaneously on the control panel in conjunction with the training.
4,000원
1
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