Manabu Tanaka
Osaka University
548 Papers
2.5K Citations
Manabu Tanaka is an academic researcher from Osaka University. The author has contributed to research in topics: Welding & Gas metal arc welding. The author has an hindex of 35, co-authored 493 publications. Previous affiliations of Manabu Tanaka include Royal Dutch Shell & Waseda University.
Chat about Author
Papers
Investigation of electrode erosion mechanism in Ar-N2 DC arc based on visualization of electrode phenomena
Abstract: Cathode erosion is an important issue in the industrial applications of the direct-current arc. However, the mechanism of erosion under molecular gas has not been well clarified. The purpose of this study is to elucidate the erosion mechanism of tungsten-based cathodes in atmospheric pressure Ar-N2 DC arcs. Tungsten electrodes doped with various metal oxides as electron emitters were investigated. The metal vapor from the cathode was successfully visualized by an optical system that combined a high-speed camera with bandpass filters. The difference in the electrode temperature distribution due to the additives is explained with two factors. The first is the thermal factor that the high melting point additive is difficult to spread on the cathode surface. The second is the chemical factor that the emitter is reduced by nitrogen radicals. Advances in the understanding of such electrode phenomena are expected to lead to expanded applications of nitrogen arcs.
2
Friction stir welding of ultra high-purity aluminium thin sheets never to lower high conductivity at ultra-low temperature
Hajime Yamamoto,Yusuke Aoyama,Kazuhiro Ito,Tetsuo Yamada,Manabu Tanaka,Hiroaki Hoshikawa,Akira Nagata,Toshiaki Kumagai +7 more
TL;DR: In this article, the authors used ultrahigh-purity aluminium sheets with excellent electrical and thermal conductivity at ultra-low temperature have uses in heat dissipation components in, for example, superconducting equipment.
2
An Engineering Model for Numerical Simulations of GMA Welding
TL;DR: In this article, a model of gas metal arc welding with constant voltage and constant feed rate is presented, where the wire extension and arc length change by a balance of a wire feed rate and a calculated wire melting rate.
2
Patent
Arc discharge induction method and device therefor
Masahiro Tsukamoto,Manabu Tanaka,Kensuke Murai +2 more
- 06 Aug 2002
TL;DR: In this article, a plasma jet is formed between the base metal and the electrode to set up the arc discharge, even if the alignment accuracy of an electrode is not enhanced. But the plasma jet does not have the capability of forming an arc discharge.
2