ブカン，　アントニー （ブカン　アントニー）

Beaucamp, Anthony

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

外部リンク
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経歴 【 表示 ／ 非表示 】

  • 2015年04月
    -
    2023年03月

    京都大学, マイクロエンジニアリング専攻, 特任准教授

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研究分野 【 表示 ／ 非表示 】

  • ものづくり技術（機械・電気電子・化学工学） / 加工学、生産工学

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研究キーワード 【 表示 ／ 非表示 】

  • Computer Aided Manufacturing (CAM)

  • Grinding and Polishing

  • Optical Design

  • Optical Fabrication

  • Ultra-Precision Engineering

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論文 【 表示 ／ 非表示 】

  • Material removal characteristics in submerged pulsating air jet polishing process

    Han Y., Liu C., Yu M., Jiang L., Zhu W., Qian L., Beaucamp A.

    International Journal of Mechanical Sciences （International Journal of Mechanical Sciences）  257 2023年11月

    ISSN  00207403

    　概要を見る

    In this paper, the material removal characteristics and mechanism of submerged pulsating air jet polishing (SPAJP) process are investigated by polishing experiment on K9 glass and computational fluid dynamics simulation. The experimental results show SPAJP can etch almost perfect Gaussian footprints with high stability. Under comparable condition, SPAJP achieves nearly 300 times higher material removal rate (3.0 × 10−3 mm3/min) than that of traditional fluid jet polishing (FJP) (9.9 × 10−6 mm3/min) at the cost of a moderate degradation in processed surface roughness from Sa 3.97 nm by FJP to Sa 20.49 nm by SPAJP. Jet evolution, abrasive behavior and material removal mechanism in SPAJP are clarified by numerical modeling and experimental jet observation. It is found that SPAJP relies on jet instability of the submerged airflow beam to entrain and accelerate abrasive particles in the slurry, achieving stable and efficient polishing removal on the workpiece surface. To explore the potential of the process for deterministic polishing, an array structure surface is then designed and polished by SPAJP. The processing results are consistent with numerical prediction results, indicating that the new process has good material removal controllability which makes it applicable to deterministic polishing. This study highlights the possibility of using SPAJP to produce ultra-precise surfaces in terms of form control or fabricate high precision optical components in a more efficient and convenient manner.

  • Feed scheduling for time-dependent machining processes by optimization of bulk removal and NC blocks

    Beaucamp A., Mizoue Y., Yamato S., Sencer B.

    Journal of Materials Processing Technology （Journal of Materials Processing Technology）  312 2023年03月

    ISSN  09240136

    　概要を見る

    Time-dependent processes such as CNC fluid jet polishing require feed-rate scheduling through deconvolution of a target removal profile and tool influence function. The dynamic constraints associated with the machine tool driving the process should be considered when solving this numerical problem. This research investigates how material bulk removal affects the scheduled feed-rate and acceleration both in the spatial and time domain, and proposes a method for matching exactly the maximum acceleration with the machine tool limit. Furthermore, the influence of CNC interpolator dynamics is investigated by means of the controller pulse response method. An optimization method for NC blocks is then proposed in order to achieve feed-rates that best match the intended profile. The benefit of bulk removal and NC blocks optimization is validated by fabrication, with and without optimization, of cylindrical Fresnel lenses. Both the shape accuracy and optical performance of the optimally fabricated lens are shown to substantially improve, suggesting that the proposed optimization method has strong potential for industrial application.

  • Hybrid tool combining stiff and elastic grinding

    Pratap A., Yamato S., Beaucamp A.

    CIRP Annals （CIRP Annals）  72 （ 1 ） 281 - 284 2023年

    ISSN  00078506

    　概要を見る

    The fabrication process chain for optically smooth surfaces tends to include several time-consuming grinding and polishing steps. To reduce process time, a hybrid tool is proposed in which a stiff grinding tool and a shape adaptive grinding (SAG) tool are fused together, by taking advantage of the elastic nature of SAG tools. The material removal achieved by the hybrid tool is equivalent to discretely using the stiff grinding and SAG tools in sequence. Under similar processing conditions, a smooth surface of ∼0.02 μm Ra can be obtained on BK7 glass with the proposed tool, instead of ∼0.2 μm Ra with the stiff grinding tool.

  • Compliant polishing of thin-walled freeform workpiece

    Zhu W.L., Gao W., Han F., Ju B.F., Chen Y.L., Beaucamp A.

    CIRP Annals （CIRP Annals）  72 （ 1 ） 285 - 288 2023年

    ISSN  00078506

    　概要を見る

    Compliant polishing using elastic tools can achieve ultraprecision surface quality on freeform workpieces. However, when it comes to thin-walled parts, the challenge arises with the complex polishing mechanics between the tool and freeform surface, without the knowledge of which the surface form can be easily degraded. To address this, an analytical model is established that can predict the interaction mechanics during polishing. On this basis, two adaptive strategies are proposed. Experiments with controllable material removal verify the high accuracy of the model, and compliant polishing of a thin-walled freeform workpiece with highly precise removal consistency below 0.5 µm was achieved.

  • Reverse Engineering Algorithm for Cutting of Ruled Geometries by Wire

    Beaucamp A.T.H., Takeuchi Y.

    International Journal of Automation Technology （International Journal of Automation Technology）  16 （ 3 ） 349 - 355 2022年05月

    ISSN  18817629

    　概要を見る

    Abrasive wire cutting (AWC) and wire electric discharge machining (WEDM) are efficient and econom-ical processes for the fabrication of precision parts from bulk material. Operating costs and manufacturing lead times are low compared to more general methods such as 5-axis CNC milling, turning, or electro-discharge machining. In this paper, an algorithm based on differential geometry in Euclidean space is proposed for reverse engineering of ruled geometries. The algorithm can determine whether a given geometry is producible by wire cutting, and can also de-rive the associated wire trajectories. Implementation is demonstrated by producing complex turbine blade geometries on 4-axis wire cutting machines with an overall shape accuracy of 20–40 μm peak-to-valley.

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総説・解説等 【 表示 ／ 非表示 】

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競争的研究費の研究課題 【 表示 ／ 非表示 】

  • Micro-bubble assisted abrasive waterjet polishing

    2017年04月
    -
    2019年03月

    Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Grant-in-Aid for Young Scientists (B), 未設定

    　研究概要を見る

    In fluid jet polishing (FJP), a polishing liquid is pressurized as a jet and and impinges a surface. An improved system consisting of an ultrasonic transducer and acoustic lens mounted atop the FJP nozzle cavity was tested, which boosted material removal rates by up-to 1000%. However, it was not clear whether the removal boost was due to a micro-scale or macro-scale phenomenon.
    A study of micro-pit formation by collapsing micro-bubbles in the near wall region determined that micro-jetting and water hammer pressure do not seem to occur in UFJP, so the micro-scale hypothesis was ruled out.
    A study of workpiece vibrations found that significant shear forces exist at the workpiece surface when ultrasonic vibration is applied to the FJP beam. After theoretical confirmation of the correlation between macro-scale fluid displacement and shear force, the standard erosion model in FJP was modified by adding time-averaged vibration terms. The model and experiments were finally in good agreement.

  • Ultrasonic cavitation assisted fluid jet polishing

    2015年08月
    -
    2017年03月

    日本学術振興会, 科学研究費助成事業, ブカン アントニー, 勝浦 知也, 研究活動スタート支援, 未設定

    　研究概要を見る

    超硬合金などの硬い材料の表面や，付加製造によって製造されたを超精密表面に仕上げるために，高速流体噴射研磨（FJP）の除去率を向上させることが求められている．複雑な光学表面や人工関節などのアプリケーションがある．
    そこで本研究では，FJPの加工精度を維持しつつ除去率を向上させるために，超音波キャビテーションをノズル内に発生させることで気泡をジェットに添加する方法を提案した．研磨液の流れと超音波の伝播をシミュレーションし，超音波FJPが実現可能であることを確認した．さらに，超音波FJPを行うための装置を開発した．この方法では，表面粗さを悪化させることなく除去率を380%向上させることが可能である．

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知的財産権等 【 表示 ／ 非表示 】

  • Shaping apparatus, method and tool

    出願日：   2019年03月 

    公開日： 特開GB/19/04384.3   

    特許権

  • Fluid jet processing

    出願日：   2018年04月 

    公開日： 特開GB/18/06475.8   

    特許権

  • Method and apparatus for shaping workpieces

    出願日：   2016年12月 

    公表日：   2018年12月 

    発行日： 特許GB/16/21699.6 

    特許権

  • Method for shaping a workpiece

    出願日：   2014年10月 

    発行日： 特許US/2017/0246728A1  2016年10月

    特許権

  • Computer controlled work tool apparatus and method

    出願日：   2007年08月 

    発行日： 特許GB/0716597.0  2009年08月

    特許権

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受賞 【 表示 ／ 非表示 】

  • F. W. Taylor Medal

    BEAUCAMP, Anthony Tadeus Herve, 2015年08月, CIRP (International Academy for Production Engineering), Award for significant contribution to super-fine finishing

  • 優秀論文賞

    BEAUCAMP, Anthony Tadeus Herve, 2015年06月, 公益財団法人 工作機械技術振興財団, Shape adaptive grinding of silicon carbide

  • 優秀論文賞

    BEAUCAMP, Anthony Tadeus Herve, 2015年05月, マザック財団, Shape adaptive grinding of silicon carbide

  • Best Young Scientist Award (Surface Integrity Conference)

    BEAUCAMP, Anthony Tadeus Herve, 2014年05月, CIRP (International Academy for Production Engineering), Surface integrity of fluid jet polished surface

  • 優秀論文賞

    BEAUCAMP, Anthony Tadeus Herve, 2014年05月, マザック財団, Super-fine finishing to 0.3 nm rms

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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

    2024年度

  • 生産システム

    2024年度

  • システムデザイン工学実験第１

    2024年度

  • 理工学基礎実験

    2024年度

  • 総合デザイン工学課題研究

    2024年度

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委員歴 【 表示 ／ 非表示 】

  • 2017年12月
    -
    継続中

    International Journal of Machine Tools and Manufacture, ASSOCIATE EDITOR

  • 2016年09月
    -
    継続中

    International Academy for Production Engineering (CIRP), ASSOCIATE MEMBER

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