| Project/Area Number |
18K04738
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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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| Review Section |
Basic Section 26030:Composite materials and interfaces-related
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| Research Institution | Anan National College of Technology |
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Principal Investigator |
NISHIMOTO KOJI 阿南工業高等専門学校, 創造技術工学科, 教授 (40501169)
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| Co-Investigator(Kenkyū-buntansha) |
西野 精一 阿南工業高等専門学校, 創造技術工学科, 教授 (00218174)
安田 武司 阿南工業高等専門学校, 創造技術工学科, 准教授 (70610468)
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| Project Period (FY) |
2018-04-01 – 2021-03-31
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| Project Status |
Completed (Fiscal Year 2020)
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| Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2020: ¥130,000 (Direct Cost: ¥100,000、Indirect Cost: ¥30,000)
Fiscal Year 2019: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2018: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
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| Keywords | レーザ / 亜鉛めっき鋼板 / 重ね溶接 / 亜鉛めっき / 溶接 |
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| Outline of Final Research Achievements |
Development of galvanized steel sheet laser lap joining method without gap at joining interface by directly irradiate laser into joining interface, and investigated about weldability and joint strength. In this study, an optical system to split and irradiate the laser beam for the purpose of galvanization removal and welding was designed and fabricated. It was able to galvanization removal and main welding in one pass. From the results of x-ray transmission observation, the formation of porosity could be suppressed, and because of the tensile shear test, a high strength joints that fracture from the base metal was obtained.
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| Academic Significance and Societal Importance of the Research Achievements |
本研究は、ものづくりの基盤である溶接技術の基盤研究であることと、自動車産業で多用されている亜鉛めっき鋼板の重ね溶接を対象としており、従来技術よりも高品質且つ高効率な溶接技術が求められていることから、本研究成果の社会的意義は大きい。また、本手法は接合界面を直接溶融可能な溶接法であり、従来の溶接法よりも数倍以上の溶接速度で溶接可能であることと、接合界面へのレーザ照射法により溶融制御も期待でき、学術的にも意義の大きい研究である。
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