4 0 0 0 OA 117 TIG溶接の宇宙空間での適用に関する基礎的研究
- 著者
- 吹田 義一 増淵 興一 佃 芳行 寺嶋 昇 小笠原 正信 高橋 永
- 出版者
- 一般社団法人日本機械学会
- 雑誌
- 日本機械学會論文集. C編 (ISSN:03875024)
- 巻号頁・発行日
- vol.61, no.585, pp.2134-2140, 1995-05-25
- 被引用文献数
- 17
The need to develop space welding technology as fast as possible is stressed for efficient repair and construction of space development projects. It is shown that in a vacuum like in space conventional GTA welding in which the solid tungsten electrode is used could not be applied. To solve this problem, the authors propose the GHTA process using a hollow tungsten electrode. An arc discharge could be started and maintained by flowing a trace amount of argon gas from the end of the electrode. In the proposed GHTA process, the stationary arc discharge which can be used as the welding heat source, starts after several seconds of the transient arc discharge. Also, the characteristics of arc discharges and penetrations due to the GHTA process in a vacuum are clarified.
1 0 0 0 OA 宇宙ステーション軌道圧力でのGHTA溶接実験
- 著者
- 吹田 義一 正箱 信一郎 佐藤 順子 黒川 哲平 高井 大輔 佃 芳行 寺嶋 昇 藤澤 正一郎 黄地 尚義 増渕 興一
- 出版者
- 社団法人溶接学会
- 雑誌
- 溶接学会論文集 : quarterly journal of the Japan Welding Society (ISSN:02884771)
- 巻号頁・発行日
- vol.21, no.1, pp.33-38, 2003-02-05
- 被引用文献数
- 6 8
As a welding method in space, the authors have proposed the GHTA (Gas Hollow Tungsten Arc) welding method in the previous papers, where some GHTA welding experiments have been conducted under the condition of low pressure (10^-2 Pa) and/or the micro-gravity. In the present paper, a feasibility study has been conducted whether the method can be used under such a high vacuum condition (10^-5 Pa) as on the space station orbit. As a result, it is made clear that the GHTA method is quite feasible under the high vacuum condition and its melting process strongly depends on the operating gas species such as Ne, Ar and Kr. Increasing the flow rate of operating gas decreases the mass of metal vapor from molten pool and the use of a heavy operating gas such as Kr also decreases the mass of metal vapor.