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스퍼 기어의 FEM 해석 및 IRT 기법을 적용한 건전성 평가
노치성(Chi-Sung Roh),정윤수(Yoon-soo Jung),이경일(Gyung-Il Lee),김재열(Jae-Yeol Kim) 한국트라이볼로지학회 2016 한국윤활학회지(윤활학회지) Vol.32 No.4
As an economic, high quality, and highly reliable gear with low noise and low vibration is demanded, an overall finite element analysis regarding a gear is required. Also, an infrared thermography test, which is a quantitative testing technique, is demanded for safety and longer lifespan of gear products. In order to manufacture a gear product or to determine safety of a gear being used, it is necessary to precisely determine ingredients of a material constituting a gear and detect any internal defect. This study aims to realize a design that minimizes the spur gear displacement with respect to power during its rotation and ensures the spur gear control capacity by using a 3D model and the midasNFX program. This facilitates the assessment of the possibility of cracking by evaluating the stress intensity and focusing on the integrity of the spur gear. We prepare the specimen of the spur gear based on the possibility of cranking as per the result of the structural interpretation from an infrared ray thermal measuring technique. After cooling the spur gear, we perform experiments using thermography and halogen lamps and analyze the temperature data according to the results of the experiment. In the experiment which we use thermography after cooling, we find a rise in the temperature of the room. As a result, the defective part show temperatures lower than their surroundings while the normal parts have temperatures higher than the defective parts. Therefore, it possible to precisely identify defective part owing to its low temperature.
하이브리드 기어의 적외선 열화상 기법을 적용한 건전성 평가
노치성 ( Roh Chi-sung ),김재열 ( Kim Jae-yeol ) 조선대학교 공학기술연구원 2016 공학기술논문지 Vol.9 No.3
The study made a hybrid gear test sample compared to the normal part and a defect part, and by using the infrared measuring technique at room temperature after cooling applied to a method of detecting a defect and a halogen lamp as a heat source through infrared measurement technology to evaluate the defect detection and quality of hybrid gear. After cooling down the spur gear, experiments were carried out using a technique to which thermography and halogen lamps are applied; according to the experiment results, the temperature data were analyzed. In case of the experiment to which thermography was applied after cooling, it was analyzed that the temperature was raised in the room temperature. As a result, the defected part had temperature lower than its surroundings while other normal parts had temperature higher than the defected part. It was possible to precisely diagnose the defected part due to gauged low temperatures at the defected part.
초음파 적외선열화상 기법을 적용한 모터 코어의 신뢰성 평가
정윤수(Yoon-Soo Jung),노치성(Chi-Sung Roh),이경일(Gyung-Il Lee),김재열(Jae-Yeol Kim) 한국기계가공학회 2016 한국기계가공학회지 Vol.15 No.4
This study used an ultrasound infrared thermography technique to detect issues in the motor core of typical power equipment. The current defect inspection method of the motor core is often incomplete (due to the limits of visual inspection) and thus the reliability of the motor core is reduced. Therefore, in this study, experiments were carried out to increase the reliability of the test by using an ultrasonic infrared thermal non-destructive inspection method to image the motor core. The ambient temperature of the experimental system was maintained at 25 ℃. Experiments were carried out to examine a damaged motor core and a defect-free motor core. Experimental results confirm the technique clearly detected defects in the motor core, thereby confirming the possibility of using this technique in the field.
패턴인식 기법을 적용한 신차 제조공정 맞춤식 비젼 계측시스템 개발
이경일(Gyung-Il Lee),김재열(Jae-yeol Kim),노치성(Chi-sung Roh),최철준(Choi-Choul Jun) 한국기계가공학회 2016 한국기계가공학회지 Vol.15 No.4
Measurements of the automobile manufacturers are available anywhere and anytime, directly based on the criterion of failure is measured. The maintenance of high-precision production activities is direct evidence of the fact that competitive manufacturing activities are very important in determining the success of companies to recall defective starting from raw material costs. The current manufacturing sites produce calipers and clearance gauge the degree of tool only specific. Therefore, judging the quality, including the number of errors, requires a lot of attention to the dimension failures in day-to-day measurements and measurement tasks and duties repeated in difficult situations. In this paper, we aim to develop a vehicle manufacturing plant site using each of the manufacturing processes while operating a measurement tool. We display it using the Image Processing PC-based S/W with all those visual facts by management and recorded as image information a more accurate and current situation to obtain information and share visual measurements. We carry out research on the design and development vision inspection algorithm applied for pattern-recognition techniques that can help manufacturing site quality control.