パルスアーク溶接における陽極への入熱量と径方向駆動力に及ぼす電流増加率の寄与

カテゴリ: 部門大会

論文No: 28

グループ名: 【B】平成25年電気学会電力・エネルギー部門大会

発行日: 2013/08/27

タイトル(英語): Contribution for Heat Transfer and Heat Flux to Anode Affected by Current Increment Ratio in Pulsed Arc Welding

著者名: 後藤 康徳(東京都市大学),岩尾 徹(東京都市大学),湯本 雅恵(東京都市大学)

著者名(英語): Yasunori Goto(Tokyo City University),Toru Iwao(Tokyo City University),Motoshige Yumoto(Tokyo City University)

キーワード: パルスアーク|アーク溶接|駆動力|電磁熱流体シミュレーション|pulsed arc|arc welding|driving force|electromagnetic thermal fluid simulation

要約(日本語): Gas tungsten arc (GTA) welding is a high-quality joining technology. However, the TIG welding cannot melt the welding pool deeply. Therefore, the weld defect sometimes occurs at TIG welding because of this poor heat transfer to the anode and ability of melting deeply. In addition, the welding speed becomes slow, and the productivity is decreased. The welding parameter should be controlled in order to improve the welding productivity and prevent the weld defect. The pulsed arc welding has been developed because it can control the heat transfer with the current waveform.　The shape of welding pool is decided by the temperature distribution near cathode, the current density distribution at the arc and welding pool and driving force in the welding pool. In the case of pulsed arc welding, these phenomena are derived from current waveform, especially the current peak, base, and transition time. In this paper, the contribution for the radial driving force and heat transfer to anode affected by current increment ratio in pulsed arc was elucidated. As a result, when the current increment ratio increases, the heat transfer becomes small, and the heat flux is concentrated to the center. The max driving force for radial direction increases because of high marangoni effect. Therefore, the current increment ratio plays important role for making welding pool.

PDFファイルサイズ: 6,260 Kバイト