2017 Fiscal Year Final Research Report
Development of High-quality and High-reliable Laser Micro-welding of Difficult-to-weld Materials
| Project/Area Number |
15K05725
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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 |
Production engineering/Processing studies
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| Research Institution | Okayama University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
岡田 晃 岡山大学, 自然科学研究科, 教授 (60263612)
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| Project Period (FY) |
2015-04-01 – 2018-03-31
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| Keywords | アルミニウム / 銅 / レーザ溶接 / パルスレーザ / 微細溶接 / 溶け込み深さ / 重畳 / 吸収率 |
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| Outline of Final Research Achievements |
The combination of a pulsed Nd:YAG laser and a continuous diode laser could perform the high-performance micro-welding of aluminum alloy. A pulsed Nd:YAG laser was absorbed effectively from the beginning of laser scanning by pre-heating Nd:YAG laser pulse with the superposition of continuous LD, and wide and deep weld bead could be obtained with better surface integrity.
As for micro-welding of copper material, the stable absorption state could be achieved by using a pulsed green Nd:YAG laser, since its absorptivity showed almost constant values with change of power density. A longer pulse duration is effective to achieve not only high absorptivity but also low deviation of absorptivity. The pulse waveform with maximum peak at the early period and a long pulse duration led to stabilizing the penetration depth with less porosity.
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| Free Research Field |
特殊加工学
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