[ Article ]

Journal of the Korean Society of Manufacturing Technology Engineers - Vol. 34, No. 2, pp.96-103

ISSN: 2508-5107 (Online)

Print publication date 15 Apr 2025

Received 05 Jan 2025 Revised 14 Jan 2025 Accepted 21 Jan 2025

DOI: https://doi.org/10.7735/ksmte.2025.34.2.96

마찰교반용접 모니터링을 위한 실시간 무선 툴 온도 측정 시스템 개발

조민구^a^{, b} ; 김진수^a^{, *} ; 김재황^c ; 박민석^a^{, b} ; 이훈희^a ; 강성욱^d^{, *}

Development of a Real-Time Wireless Tool Temperature Measurement System for Friction Stir Welding Monitoring

Mingoo Cho^a^{, b} ; Jinsu Gim^a^{, *} ; Jaehwang Kim^c ; Min-Suk Park^a^{, b} ; Hoon-Hee Lee^a ; Sungwook Kang^d^{, *}

aJinju Center, Dongnam Technology Application Division, Korea Institute of Industrial Technology (KITECH)
bSchool of Mechanical Engineering, Pusan National University
cJeonbuk Technology Application Division, Korea Institute of Industrial Technology (KITECH)
dDepartment of Smart Ocean Mobility Engineering, Changwon National University

Correspondence to: ^*Tel.: +82-55-924-0134 E-mail address: jgim@kitech.re.kr (Jinsu Gim). Correspondence to: ^*Tel.: +82-55-213-3681 E-mail address: swkang@changwon.ac.kr (Sungwook Kang). Contributed by footnote: ^*These authors contributed equally to this work.

Abstract

Friction stir welding is a solid-state welding technique that softens and joins materials using frictional heat generated at the interface between the rotating tool and the workpiece. This frictional heat is influenced by various parameters, such as tool geometry, rotational speed, transverse speed, and plunge depth. To optimize weld quality, it is essential to study the relationship between frictional heat and welding process parameters. Conventional methods, such as measuring the workpiece temperature, make it difficult to monitor and control the process in practical FSW applications because the process temperature along the welding path is challenging to measure. To solve this, this study proposes directly measuring FSW tool temperature. During FSW, a wireless temperature measurement system is devised to capture tool temperature in real time. Transient tool temperature profiles were measured under various FSW conditions, and the stabilized tool temperature showed a strong correlation with the tool rotation speed.

Keywords:

Friction stir welding (FSW), Wireless measurement, Real-time monitoring, Welding, Tool temperature

Acknowledgments

본 연구는 한국생산기술연구원 기본사업 “[생산기술] 설명가능 인공지능(XAI) 및 무선 툴 온도 모니터링 기반 Hemispherical 툴 FSW 공정 기술 개발(KITECH JE250027)”의 지원으로 수행되었습니다. 또한 본 논문은 2025년도 정부(산업통상자원부)의 재원으로 한국산업기술진흥원의 지원을 받아 수행된 연구입니다(P0017006, 2025년 산업혁신인재성장지원사업).

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Mingoo Cho

Researcher in Korea Institute of Industrial Technology (KITECH) & Ph. D. Candidate in School of Mechanical Engineering, Pusan National University. His research interests are Friction Stir Welding, Finite Element Analysis and Artificial Intelligence.

E-mail: cmg0142@pusan.ac.kr

Jinsu Gim

Senior Researcher, Korea Institute of Industrial Technology (KITECH). His research interests are Autonomous Manufacturing Using In-process Sensors and Artificial Intelligence, Polymer/Plastic/Composite Processing including Molding and Forming, Rheology, and Mold Technology.

E-mail: jgim@kitech.re.kr

Jaehwang Kim

Principal Researcher, Korea Institute of Industrial Technology (KITECH). His research interests are Light Metal and Artificial Intelligence.

E-mail: raykim@kitech.re.kr

Min-Suk Park

Researcher, Korea Institute of Industrial Technology (KITECH) & Ph. D. Candidate in School of Mechanical Engineering, Pusan National University. His research interests are Machine tool Metrology and Cutting Process Optimization.

E-mail: msparker8@kitech.re.kr

Hoon-Hee Lee

Principal Researcher in Korea Institute of Industrial Technology (KITECH). His research interests are Machine Tool Metrology and Precision Process Control.

E-mail: hhlee84@kitech.re.kr

Sungwook Kang

Associate Professor in Changwon National University (CWNU). His research interests are Friction Stir Welding, Finite Element Analysis, Thermal Elasto-plastic Simulation and Topology Optimization.

E-mail: swkang@changwon.ac.kr