ガスタングステンアーク溶接における電流密度および流速が及ぼす溶融池内の駆動力変化

カテゴリ: 論文誌(論文単位)

グループ名: 【B】電力・エネルギー部門

発行日: 2012/05/01

タイトル(英語): Driving Force Variation in Weld Pool Affected by Current Density and Flow Velocity of Gas Tungsten Arc Welding

著者名: 酒井　覚（東京都市大学 工学部 電気電子工学科），瀧　寛之（東京都市大学 工学部 電気電子工学科），岩尾　徹（東京都市大学 工学部 電気電子工学科），田代　真一（大阪大学 接合科学研究所），田中　学（大阪大学 接合科学研究所），湯本　雅恵（東京都市大学 工学部 電気電子工学科）

著者名(英語): Tadashi Sakai (Department of Electrical and Electronic Engineering, Tokyo City University), Hiroyuki Taki (Department of Electrical and Electronic Engineering, Tokyo City University), Toru Iwao (Department of Electrical and Electronic Engineering, Tokyo City University), Shinichi Tashiro (Joining and Welding Research Institute, Osaka University), Manabu Tanaka (Joining and Welding Research Institute, Osaka University), Motoshige Yumoto (Department of Electrical and Electronic Engineering, Tokyo City University)

キーワード: 電磁流体シミュレーション，電流密度，流速，溶融池，駆動力，アーク溶接　　MHD simulation，current density，flow velocity，weld pool，driving force，arc welding

要約(英語): In arc welding, Gas Tungsten Arc Welding (GTAW) is suitable when good quality and a good surface are required. However, the weld shape is shallow and wide. Furthermore, GTAW welding is slow and inefficient. A deep weld shape is necessary to increase the welding speed. The heat input from the arc and convection flow of the weld pool in formation of weld pool are important. The convection flow varies along with the driving force. Past research has indicated some relation between the driving force and arc characteristics. In this study, the driving force in the weld pool changes with the current density. Flow velocity is simulated, and this relativity is elucidated. The Lorentz force, drag force, and Marangoni effect are focused in driving forces. Consequently, the Lorentz force of the axial direction decreases in direct relation to the -0.60th power of current density near the cathode in the maximum force. This force in the center of the axial direction decreases in relation to the -0.62th power of the current density. In addition, the drag force increases in relation to the 1.70th power of the maximum flow velocity, and the Marangoni effect decreases in direct relation to the -0.20th power of the maximum flow velocity in the maximum force. The driving force is apparently dependent on the arc current density and flow velocity.

本誌: 電気学会論文誌B（電力・エネルギー部門誌） Vol.132 No.5 （2012） 特集：電力・エネルギー分野を支える変電技術の新展開

本誌掲載ページ: 486-492 p

原稿種別: 論文／日本語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejpes/132/5/132_5_486/_article/-char/ja/