小池　綾 （コイケ　リョウ）

Koike, Ryo

写真a

所属（所属キャンパス）

理工学部 システムデザイン工学科 （矢上）

職名

准教授
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経歴 【 表示 ／ 非表示 】

  • 2016年04月
    -
    2019年03月

    慶應義塾大学, 理工学部システムデザイン工学科, 助教（有期）

  • 2019年04月
    -
    2024年03月

    慶應義塾大学, 理工学部システムデザイン工学科, 専任講師

  • 2024年04月
    -
    継続中

    慶應義塾大学, 理工学部システムデザイン工学科, 准教授

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学歴 【 表示 ／ 非表示 】

  • 2008年04月
    -
    2012年03月

    慶應義塾大学, 理工学部, システムデザイン工学科

    大学, 卒業

  • 2012年04月
    -
    2013年09月

    慶應義塾大学, 大学院　理工学研究科, 総合デザイン工学専攻

    大学院, 修了, 修士

  • 2013年09月
    -
    2016年03月

    慶應義塾大学, 大学院　理工学研究科, 総合デザイン工学専攻

    大学院, 修了, 博士

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論文 【 表示 ／ 非表示 】

  • In-situ heat treatment via preheating and liquid cooling during high-speed coating of gears by directed energy deposition

    Yokota M., Takemura S., Koike R., Maki T., Takaki K., Mori T., Hirono Y., Kakinuma Y.

    CIRP Journal of Manufacturing Science and Technology 61   114 - 127 2025年10月

    ISSN  17555817

    　概要を見る

    Automobile electrification has increased demand for higher-performance gears in drivetrains with specialized functional requirements beyond what conventional carburizing heat treatment can deliver. While carburizing is effective for mass production, it faces inherent limitations in achieving advanced material properties needed for next-generation applications. Therefore, this study proposes a high-speed coating method on rotational gear surfaces using directed energy deposition (DED). The proposed method can form the coating layer continuously and efficiently on the complex-shaped teeth of the gear, compared to the common method that forms coating along a complicated path matching the part's geometry. Furthermore, a localized heat treatment system integrating laser preheating and liquid cooling is introduced to precisely control material characteristics of the coating layer. Experimental results demonstrate that this combined heat treatment achieves a crack-free, hard coating layer on preformed gears. This method shows significant potential for producing customized, high-performance gears for specialized applications in next-generation vehicles while reducing process complexity.

  • Digital Twin in Process Planning of the Additive and Subtractive Process Chain for Laser Metal Deposition and Micro Milling of Stainless Steel

    Denkena B., Wichmann M., Malek T., Nguyen H.N., Kato M., Isshiki K., Koike R., Kakinuma Y.

    Journal of Manufacturing Science and Engineering 146 （ 7 ）  2024年07月

    ISSN  10871357

    　概要を見る

    Additive and subtractive (Add/Sub) manufacturing processes are increasingly being combined to produce complex parts with unique geometries and properties. However, the design of such combined processes is often challenging as it requires a deep understanding of the interaction between the different processes. On the other hand, digital twin (DT) technology has become a powerful tool in recent years for optimizing manufacturing processes. This article explores the use of the digital twin technology for a holistic process planning of combined additive and subtractive processes. The article describes the integration of laser metal deposition (LMD) and micro-milling prediction models of resulting geometry (width and height), hardness, and surface roughness into the digital twin. This is then used for combined process planning to achieve different target values regarding resulting geometry and surface roughness. For the planning of this combined process chain, further criteria such as tool life, energy, and process time are considered in the optimization, showing the potential for sustainable and efficient production. Sensorless cutting force estimation is also used to detect small cutting forces, with the potential to use this as a soft sensor for roughness estimation. The measured width, height, and roughness as a result of the process parameters suggested by the optimization algorithms showed a mean absolute percentage error (MAPE) of 4, 17, and 16%, respectively.

  • Effects of high gravity on properties of parts fabricated using material extrusion system by additive manufacturing

    Jiang X., Koike R.

    Heliyon 10 （ 11 ）  2024年06月

    ISSN  24058440

    　概要を見る

    Additive manufacturing (AM) has gained significant attention in recent years owing to its ability to fabricate intricate shapes and structures that are often challenging or unattainable using conventional manufacturing techniques. This high-quality development trend entails higher requirements for the structural design of 3D printers. In this study, polylactic acid (PLA) and acrylonitrile butadiene styrene (ABS) filaments were fed through a heated extrusion nozzle, which melted the material and deposited it onto a build platform. This study's objectives are high-gravitational material extrusion (HG-MEX) systems development, analyzing the high gravity influences on the flow behavior of materials during extrusion, and understanding the effects of gravitational on material flow and overall extrusion performance. HG-MEX systems have great potential for addressing various challenges in additive manufacturing, such as precise manufacturing. The highlight of the progress is that we developed an HG-MEX system and applied surface science to material extrusion in different gravity. We established a system and obtained results on different gravity, we analyzed the analogy between different gravity phenomena. We analyzed the interplay between the behavior of the fabricated parts and gravity. We analyzed high gravity effects on extrusion processes. The results confirmed the characteristics and feasibility of the developed system. The results suggest that a material extrusion line operating under 15 G conditions resulted in better printing quality compared to one operating under 1 G conditions. This observation implies that high gravity had a positive effect on the extrusion process, leading to improved material extrusion performance.

  • Influence of metal structure on mechanical characteristics in high-speed coating layer fabricated via Directed Energy Deposition

    Hashimoto M., Koike R., Kakinuma Y., Hirono Y., Mori T., Oda Y.

    Procedia CIRP 124   227 - 230 2024年

    ISSN  22128271

    　概要を見る

    Directed energy deposition (DED) is an additive manufacturing process wherein a metal powder is fed through a nozzle onto a baseplate, melted, and solidified using a laser. Potential applications of DED have been actively discussed. In this study, laser-based DED (DED-LB) was applied as a high-speed metal-coating technique to a cylindrical pipe. The mechanical properties of DED-fabricated objects were strongly affected by processing parameters such as laser power, powder feed rate, and rotational speed of the cylindrical pipe when using 20MnCr5 and M2 as the coating materials. Hardness measurements showed that the hardness of 20MnCr5 increased with a high heat input, whereas that of M2 increased with a low heat input. The two metals exhibited opposite trends in terms of hardness variation because of the differences in their transformation points. This study analyzed a layer coated with DED-LB from the viewpoint of metal morphology.

  • Metal Additive Manufacturing Improved in High Gravitational Fields

    Koike R.

    Yosetsu Gakkai Shi Journal of the Japan Welding Society 93 （ 7 ） 429 - 434 2024年

    ISSN  00214787

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競争的研究費の研究課題 【 表示 ／ 非表示 】

  • 正味無重力プロセスに基づく超低密度ポーラス金属造形

    2022年04月
    -
    2025年03月

    文部科学省・日本学術振興会, 科学研究費助成事業, 小池 綾, 基盤研究(B), 補助金,  研究代表者

  • 人工重力制御を適用した粉末床溶融積層造形法による金属3D造形

    2019年04月
    -
    2022年03月

    文部科学省・日本学術振興会, 科学研究費助成事業, 小池　綾, 若手研究, 補助金,  研究代表者

  • 溶融金属流動の粒子法解析に基づく指向性ポーラス堆積法の開発

    2017年04月
    -
    2019年03月

    文部科学省・日本学術振興会, 科学研究費助成事業, 小池　綾, 若手研究(B), 補助金,  研究代表者

  • 合金固液相変化を解析する指向性エネルギー堆積法シミュレータの開発

    2016年08月
    -
    2018年03月

    文部科学省・日本学術振興会, 科学研究費助成事業, 小池　綾, 研究活動スタート支援, 補助金,  研究代表者

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担当授業科目 【 表示 ／ 非表示 】

  • システムデザイン工学輪講

    2025年度

  • マシンデザイン

    2025年度

  • システムデザイン工学実験第２

    2025年度

  • システムデザイン工学実験第１

    2025年度

  • システムデザイン工学概論

    2025年度

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