2005 Fiscal Year Final Research Report Summary
Study on Advanced Electro-magnetic Controlled Molten Pool Welding
| Project/Area Number |
15360395
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Material processing/treatments
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| Research Institution | Okinawa National College of Technology |
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Principal Investigator |
MANABE Yukio Okinawa National College of Technology, Mechanical System Engineering, Professor, 機械システム工学科, 教授 (30360332)
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| Co-Investigator(Kenkyū-buntansha) |
MAKISHI Takashi Okinawa National College of Technology, 機械システム工学科, 教授 (60219300)
MATSUDA Shoichi Okinawa National College of Technology, 機械システム工学科, 助手 (90390567)
YARA Hideo Ryukyus University, Mechanical System Engneering, Professor, 工学部, 教授 (60045028)
TANAKA Manabu Osaka University, Joining and Welding Reserch Institute, Assistant professor, 接合科学研究所, 助教授 (20243272)
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| Project Period (FY) |
2003 – 2005
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| Keywords | Electro-magnetic force / Electro-magnetic force controlling / GTA / Intelligent welding / Penetration control / Simulation / bead shape control / multi-function welding |
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| Research Abstract |
Head investigator has already proposed the new concept welding method named "Electro-magnetic Controlled Molten Pool Welding (ECMP Welding)" that controls the molten metal flow and bead shape by using directional electro-magnetic force. In this research, it attempted to research and developing for advancing the ECMP Welding.
As a result, the aim of this research and development was achieved. An overview is shown below.
1. Combining the heat conduction analysis and electro-magnetic analysis, the simulation system was developed for estimating the thermal distribution of welding, magnetic field distribution, electric current distribution and electro-magnetic force distribution. And it was used for predicting the experimental condition and designing new experimental system.
2. By the mentioned analysis, new magnetizing method was proposed and new experimental system which was applicable to overhead, vertical and flat position was manufactured.
3. Austenitic stainless steel for the non magnetic material and carbon steel for the magnetic material were choose for the experiment, and it was proved that "Advanced Electro-magnetic Controlled Molten Pool Welding "had an effect to improve the bead shape even in the overhead, vertical and flat position by the electro-magnetic force. Moreover, this welding method was used for practical construction of huge 9% Ni-LNG tank.
4. A new intelligent welding process was proposed that made it possible to control the penetration depth of weld bead by electro-magnetic force, and moreover new multi-functional welding process that made it possible to also refining the solidification structure and bead shape by using an unsymmetrical alternating magnetizing current.
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