Adaptive Control and Repair for Lap Welds of Aluminum Alloy Sheets Based upon In-Process Monitoring

Kawahito, Yousuke; Katayama, Seiji

doi:https://doi.org/10.18910/3660

このアイテムのアクセス数:124件（2023-12-11 20:40 集計）

このアイテムへのリンクには次のURLをご利用ください: https://doi.org/10.18910/3660

このアイテムへのリンクには次のURLをご利用ください: https://hdl.handle.net/11094/3660

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タイトル	Adaptive Control and Repair for Lap Welds of Aluminum Alloy Sheets Based upon In-Process Monitoring
著者	NRID 1000070379105 1000070379105 著者名 Kawahito, Yousuke
著者	NRID 1000010144528 1000010144528 著者名 Katayama, Seiji
キーワード等	Adaptive control
	In-process monitoring
	Micro laser welding
	Aluminum alloy
	Repair
抄録	A new procedure of in-process monitoring and adaptive control has been developed for laser micro-spot lap welding of A3003 aluminum alloy sheets. The objective is to produce sound partial- and full-penetration welds without through-holes. In partial-penetration welds, the reflected laser beam and the radiated heat from the welding area were effective as in-process monitoring signals for detecting melting and though-hole formation in the upper sheet during laser irradiation. Laser pulse duration and peak power were controlled at every 150 µs intervals during spot welding on the basis of the heat radiation signal detecting the though-hole. In the full-penetration welds, the laser power was controlled so as to keep the value of the reflected light signal higher than the minimum and to restrict the variation of the heat radiation signal within one-third levels of the maximum increase and decrease, to prevent the formation of a through-hole. Consequently, the laser pulse peak power was properly controlled on the basis of the reflected light power and the heat radiation variation and this led to the production of sound welds at all times. The above results proved the effectiveness of in-process monitoring and the availability of adaptive control.
出版者	大阪大学接合科学研究所
	オオサカダイガクセツゴウカガクケンキュウジョ
	Joining and Welding Research Institute, Osaka University
収録物名	Transactions of JWRI
巻(号)	34(2)
ページ	7-15
刊行年月	2005-12
言語	英語
ハンドルURL	https://hdl.handle.net/11094/3660
DOI	https://doi.org/10.18910/3660
PISSN	03874508
NCID	AA00867058
アクセス権	open access
出版タイプ	Version of Record
カテゴリ	紀要論文 Departmental Bulletin Paper
カテゴリ	Transactions of JWRI / Vol.34 No.2 (2005-12)

資源タイプ	紀要論文
ローカル資源タイプ	紀要論文
DCMI資源タイプ	text
DCTERMS.bibliographicCitation	Transactions of JWRI. 2005, 34(2), p. 7-15
DC.title	Adaptive Control and Repair for Lap Welds of Aluminum Alloy Sheets Based upon In-Process Monitoring
DC.creator	Kawahito, Yousuke
DC.creator	Katayama, Seiji
DC.publisher	大阪大学接合科学研究所
	オオサカダイガクセツゴウカガクケンキュウジョ
	Joining and Welding Research Institute, Osaka University
DC.language' scheme='DCTERMS.RFC1766	英語
DC.type' scheme='DCTERMS.DCMIType	text
DCTERMS.issued' scheme='DCTERMS.W3CDTF	2005-12
DC.subject	Adaptive control
	In-process monitoring
	Micro laser welding
	Aluminum alloy
	Repair
DCTERMS.abstract	A new procedure of in-process monitoring and adaptive control has been developed for laser micro-spot lap welding of A3003 aluminum alloy sheets. The objective is to produce sound partial- and full-penetration welds without through-holes. In partial-penetration welds, the reflected laser beam and the radiated heat from the welding area were effective as in-process monitoring signals for detecting melting and though-hole formation in the upper sheet during laser irradiation. Laser pulse duration and peak power were controlled at every 150 µs intervals during spot welding on the basis of the heat radiation signal detecting the though-hole. In the full-penetration welds, the laser power was controlled so as to keep the value of the reflected light signal higher than the minimum and to restrict the variation of the heat radiation signal within one-third levels of the maximum increase and decrease, to prevent the formation of a through-hole. Consequently, the laser pulse peak power was properly controlled on the basis of the reflected light power and the heat radiation variation and this led to the production of sound welds at all times. The above results proved the effectiveness of in-process monitoring and the availability of adaptive control.
DC.identifier	10.18910/3660
DC.format	application/pdf
citation_doi	https://doi.org/10.18910/3660
citation_title	Adaptive Control and Repair for Lap Welds of Aluminum Alloy Sheets Based upon In-Process Monitoring
citation_author	Kawahito, Yousuke
citation_author	Katayama, Seiji
citation_publisher	大阪大学接合科学研究所
	オオサカダイガクセツゴウカガクケンキュウジョ
	Joining and Welding Research Institute, Osaka University
citation_language	英語
citation_date	2005-12
citation_journal_title	Transactions of JWRI
citation_volume	34
citation_issue	2
citation_firstpage	7
citation_lastpage	15
citation_public_url	https://hdl.handle.net/11094/3660
citation_doi_detail	10.18910/3660

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