| Project/Area Number |
17K06824
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Composite materials/Surface and interface engineering
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| Research Institution | Nihon University |
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Principal Investigator |
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| Project Period (FY) |
2017-04-01 – 2023-03-31
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| Project Status |
Completed (Fiscal Year 2022)
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| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2019: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2017: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
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| Keywords | 摩擦攪拌接合 / アルミニウム合金 / 送給肉盛 / 多層多パス接合 / 厚板接合 / 汎用工作機械 / マルチパス接合 / ステーショナリーショルダー型ツール / 肉盛 / ステーショナリーショルダ型ツール / マルチパス摩擦攪拌接合 / ステーショナリーショルダ型摩擦攪拌接合ツール / 肉盛摩擦攪拌接合 / 開先形状 / 肉盛材 |
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| Outline of Final Research Achievements |
This study is aimed to develop a method to build-up opened grooves by friction stir welding, as commonly operated in fusion welding, in order to relieve severe requirements on stiffness of friction stir welding machines. In the beginning, newly developed functional stationary-shoulder friction stir welding tool, which can feed welding wires into the welding zone, was applied. However, the stirred zone failed to weld the parent A6061 aluminum alloy plates with the building-up material. Therefore, the tool shape was redesigned to a common monolithic type. The shape of the grooves and the building-up materials were also changed to rectangular shape to fit the tool. By this change, the open grooves were successfully filled by the building-up materials. Finally, 2-layer 4-pass build-up friction stir welding of 10-mm-thick A6061 plates were demonstrated using conventional milling machine.
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| Academic Significance and Societal Importance of the Research Achievements |
肉盛材連続送給による肉盛摩擦攪拌接合が可能であることを実証し，これを応用して低剛性の汎用工作機械でも厚板を多層多パス接合することが可能となった．これは高価な接合専用機がなくとも摩擦攪拌接合が可能であることを提示し，摩擦攪拌接合技術の普及を促進することにつながる．
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