| 研究課題/領域番号 |
23KJ0455
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| 研究種目 |
特別研究員奨励費
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| 配分区分 | 基金 |
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| 応募区分 | 国内 |
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| 審査区分 |
小区分18020:加工学および生産工学関連
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| 研究機関 | 東京大学 |
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研究代表者 |
WANG SHUOHAN 東京大学, 工学系研究科, 特別研究員(DC2)
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| 研究期間 (年度) |
2023-04-25 – 2025-03-31
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| 研究課題ステータス |
交付 (2023年度)
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| 配分額 *注記 |
2,000千円 (直接経費: 2,000千円)
2024年度: 1,000千円 (直接経費: 1,000千円)
2023年度: 1,000千円 (直接経費: 1,000千円)
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| キーワード | hybrid direct joining / metal-polymer / injection molding / additive |
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| 研究開始時の研究の概要 |
近年，軽量化技術への需要から金属-樹脂直接接合技術に対する関心が高まっており，国内外で様々な接合技術に関する研究が進められているが，信頼性の低さなどの問題から製造分野での本格導入には至っていない．本研究では，金属表面粗化と樹脂の射出成形という二つの要素技術を利用した手法に関して，産業導入に向けた信頼性確立を目指した研究を行う．
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| 研究実績の概要 |
With the increasing demand for lighter structures, the technology for bonding metals and plastics has become essential across various industries. Among the available methods, techniques that combine metal surface roughening with plastic injection molding, known as IMDJ (Injection Molded Direct Joining), are particularly significant due to their selectivity of materials and high productivity. However, these direct bonding methods have yet to achieve widespread practical use due to the challenges associated with low joint strength and the insufficient understanding of the bonding mechanisms.
Based on previous research and industrial demands, this study focuses on metal surface treatment methods that do not require the use of chemical substances. It also aims to optimize the strength of these methods and clarify the principles of bonding.
Investigation of the dependency of joint strength on blasting conditions in blast-assisted IMDJ. And enhancement of joint performance through the use of additives, with analyses of sub-microscale mechanisms were mainly focused on this year. The findings were shared at conferences and published in the “International Journal of Automation Technology” and “Materials Letters”, highlighting the research's contribution to bonding technology and polymer modification in IMDJ.
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| 現在までの達成度 (区分) |
現在までの達成度 (区分)
1: 当初の計画以上に進展している
理由
In the research plan, this study encompasses four main components. 1)Complication of the metal surface structure for IMDJ technology. 2)Improvement of the joint performance further by using additives. 3) Explore the effects of various durability tests on the joint’s polymer. 4) Development of THz polymer internal status measurement system.
This year, methods for fabricating metal surface structures without chemical usage, including blast and blast + HWT, have been explored. Research on enhancing joint performance with additives has been conducted. The joining performance has improved, and the mechanisms involved have been analyzed. These findings have been published in an international journal paper. Additionally, the environmental durability of IMDJ is currently being studied. The THz polymer internal status measurement system is under construction.
Overall, progress is exceeding expectations.
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| 今後の研究の推進方策 |
Based on the research plan, the next steps will focus on the development of the THz polymer internal status measurement system and exploring the effects of various durability tests on the joint's polymer.
Regarding the THz polymer internal status measurement system, a THz detection system will be developed, featuring a continuous wave (CW) difference frequency generation (DFG) laser, THz polarizers, lenses, and a detector. This system aims to detect the polymer orientation and residual stress without causing sample damage. Although the system may not be applied to the joining sample next year, it will lay the foundation for subsequent steps.
For the environmental durability of the IMDJ joints, emphasis will be placed on temperature durability. The joint's temperature durability will be assessed using an environmental testing machine. The mechanisms of the changes observed will be analyzed.
These results are expected to significantly enhance the credibility of IMDJ technology, based on compliance with joint performance standards and a deeper understanding of the joining mechanisms.
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