인문학
사회과학
자연과학
공학
의약학
농수해양학
예술체육학
복합학
DBpia AI
AI 에이전트
AI 아이디어
AI 리더
AI 뷰어
Citeasy
크롬 서지관리 다운로드
지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
피인용 0
초록·키워드
An active infrared thermography system based on induction heating was developed to inspect the joint quality of friction-welded shafts in automobile engine valves. Two types of engine valves were sampled from a manufacturing factory and tested using induction thermography. One valve demonstrated a good welded joint, whereas the other exhibited a joint with incomplete fusion. The engine valve samples underwent pulsed induction heating and were imaged with an infrared camera to capture the temperature distribution at the welded joint of the valve shaft. The infrared images provided clear insights into temperature changes at the welding interface caused by defects, enabling successful defect detection. The specimen with a perfect weld displayed only the interface contour of the joint of two different materials, whereas the infrared image for the imperfect joint showed a significant temperature rise at the interface due to discriminatory Joule heating in the welding defects (typically incomplete fusion). In addition, the engine valve samples were inspected using the ultrasonic pulse-echo method for qualitative comparison with the induction thermography results. Experimental results revealed that induction infrared thermography is an effective tool for inspecting defective friction welds in automobile engine valves due to its non-contact nature and ability to quickly and clearly visualize welding defects.
본문·목차
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