1993 Fiscal Year Final Research Report Summary
Sutudy on bridging tranfer phenomena in Gas Metal Arc welding
| Project/Area Number |
04650663
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
溶接工学
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| Research Institution | Osaka University |
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Principal Investigator |
HIRATA Yoshinori Osaka University, Factry of Eng., Lecture, 工学部, 講師 (00116089)
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| Project Period (FY) |
1992 – 1993
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| Keywords | GMA welding / Bridging trasfer / Electromagnetic pinch force / Capillary phenomena / Numerical analysis / Marker and cell(MAC) method / Pendent drop / Mercury |
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| Research Abstract |
The dynamics of brdging transfer are theoreticall and experinmentally investigated. Time-dependent deformation of the liquid bridge, which is formed between the electrode and the pool by a contact of a pendent drop with the pool surface, is obserbed by high speed photography and simulated with aids of the numerial solution technique for the dynamics of a biscous incompressible fluid with a free surface (MAC method) based on Finite-Difference Method. It is shown that the liquid of the pendent drop is driven to flow into the pool by the capillary force and the electromagnetic pinch force acting on the conducting bridge.
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