2021/07/12 更新

写真a

オオニシ タカシ
大西 孝
OONISHI Takashi
所属
自然科学学域 助教
職名
助教
外部リンク

学位

  • 博士(工学) ( 岡山大学 )

研究キーワード

  • 研削

  • 工作機械

研究分野

  • ものづくり技術(機械・電気電子・化学工学) / 加工学、生産工学

 

論文

  • Development of the intelligent cylindrical grinding system considering the thermal deformation of a workpiece 査読

    Takashi ONISHI, Moriaki SAKAKURA, Takuo OKANOUE, Kohei FUJIWARA, Yasuhiro FUJIYAMA, Kazuhito OHASHI

    Journal of Advanced Mechanical Design, Systems, and Manufacturing   12 ( 5 )   1 - 8   2018年10月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

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  • 長尺工作物の円筒トラバース研削における形状精度の改善 -工作物の弾性変形を考慮したトラバース速度の制御- 査読

    大西 孝, 小谷拓也, 坂倉守昭, 大橋一仁, 髙島哲平, 塚本真也

    砥粒加工学会誌   60 ( 10 )   2016年10月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)  

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  • 円筒プランジ研削における工作物熱変形量のシミュレーション解析 -砥石軸モータの電力を用いた研削抵抗の推定- 査読

    大西 孝, 坂倉守昭, 和田洋平, 佐藤直樹, 大橋一仁, 塚本真也

    精密工学会誌   82 ( 1 )   2016年1月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)  

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  • 円筒研削における工作物熱変形量を考慮した加工システムの開発 -種々の条件における寸法精度の検証- 査読

    大西 孝, 坂倉守昭, 藤山泰弘, 大橋一仁, 塚本真也

    砥粒加工学会誌   59 ( 10 )   2015年10月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)  

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  • Experimental study of the causes for shape error of a large workpiece machined by surface grinding 査読

    Takashi Onishi, Yoshiyuki Shimizu, Moriaki Sakakura, Makoto Harada, Yusuke Nakano, Shinsuke Baba, Kazuhito Ohashi, Shinya Tsukamoto

    Advanced Materials Research   806   597 - 600   2015年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

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  • In-process monitoring of the machining state in superfinishing by measuring the dynamic machining forces 査読

    Takashi ONISHI, Kazuhito OHASHI, Kohei HIGASHI, Yohei MORINAKA, Shinichi BANNO, Takakazu KITAGAWA, Shinya TSUKAMOTO

    Advanced Materials Research   806   592 - 596   2015年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

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  • Study on the shape error in the cylindrical traverse grinding of a workpiece with high aspect ratio 査読

    Takashi Onishi, Takuya Kodani, Kazuhito Ohashi, Moriaki Sakakura, Shinya Tsukamoto

    Advanced Materials Research   1017   78 - 81   2014年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:Trans Tech Publications Ltd  

    In cylindrical traverse grinding of a long workpiece with high aspect ratio, the shape accuracy of a workpiece worsens due to its low stiffness. In this study, the grinding force was measured during grinding process to calculate the elastic deformation of a workpiece caused by the normal grinding force. By comparing calculated elastic deformation with the measured shape error of ground workpiece, the cause for the shape error in case of grinding a long workpiece was investigated experimentally. From experimental results, it is confirmed that the main factor of the shape error of the long workpiece is its elastic deformation during grinding process.

    DOI: 10.4028/www.scientific.net/AMR.1017.78

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  • Study on Grinding Force Distribution on Cup Type Electroplated Diamond Wheel in Face Grinding of Cemented Carbide 査読

    Takanori FUJIWARA, Shinya TSUKAMOTO, Kazuhito OHASHI, Takashi ONISHI

    Advanced Materials Research   1017   9 - 14   2014年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

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  • Development of an advanced machine control system in superfinishing the automatic determination of the suitable machining time 査読

    Takashi Onishi, Kazuhito Ohashi, Kohei Higashi, Takahiro Iguchi, Shingo Yamashita, Hajime Isa, Shinya Tsukamoto

    Advanced Materials Research   1017   515 - 519   2014年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)   出版者・発行元:Trans Tech Publications Ltd  

    In superfinishing, a fine surface can be obtained by transiting the machining states from the cutting action to the finishing one. In this study, we propose an advanced machine control system in superfinishing. The superfinishing stone is retracted automatically when the proposed system detects improvement in the surface roughness of the workpiece. The suitable machining time is determined by monitoring the machining force ratio measured with a force sensor. With machining experiments, we confirm that the finished surface roughness can be controlled by adjusting the threshold value of the machining force ratio to retract the superfinishing stone during machining.

    DOI: 10.4028/www.scientific.net/AMR.1017.515

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  • Temperature distribution in a workpiece during cylindrical plunge grinding 査読

    Moriaki Sakakura, Takashi Onishi, Takayuki Shinoda, Kazuhito Ohashi, Shinya Tsukamoto, Ichiro Inasaki

    Production Engineering   6 ( 2 )   149 - 155   2012年4月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    In cylindrical plunge grinding, a large amount of heat flows into the workpiece continuously, accumulates and remains even after the process, which causes dimensional error. Therefore it is necessary to investigate the temperature distribution in the workpiece during grinding and analyze the influence of grinding heat on the dimension. Such an investigation has not been done enough, because the technology to measure the temperature distribution in the rotating workpiece has not matured. Considering such background, an in-process measuring system has been developed, which makes it possible to detect the temperature distribution in a wide range from the outer surface to the inside of the rotating workpiece. The system consists of small temperature sensors which are embedded into the workpiece, a micro computer attached on the workpiece which acquires the data from the sensors and transmits to a personal computer by a wireless communication device. Furthermore the contact type thermocouple which enables to measure the rotating surface temperature is added to the system. Measurement experiments revealed that the grinding heat conducts from the workpiece surface toward the center, accumulates, and remains in the workpiece even after the process. Heat conduction simulation was also performed. Good agreement was achieved between the simulated temperatures and experimental measurements. © 2012 German Academic Society for Production Engineering (WGP).

    DOI: 10.1007/s11740-012-0372-z

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  • 円筒プランジ研削における工作物表面温度のインプロセス測定結果を用いた熱変形量の予測システムの開発 査読

    大西 孝, 坂倉守昭, 佐伯哲弥, 谷村賢彦, 和田洋平, 大橋一仁, 塚本真也

    砥粒加工学会誌   55 ( 7 )   2011年7月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)  

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  • 円筒プランジ研削における工作物温度分布および工作物熱変形量のシミュレーションとインプロセス測定 査読

    大西 孝, 坂倉守昭, 篠田崇幸, 和田洋平, 大橋一仁, 塚本真也

    砥粒加工学会誌   55 ( 3 )   161 - 166   2011年3月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)  

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  • Development of a 45° tilted on-machine measuring system for small optical parts 査読

    H. Suzuki, T. Onishi, T. Moriwaki, M. Fukuta, J. Sugawara

    CIRP Annals - Manufacturing Technology   57 ( 1 )   411 - 414   2008年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    A new contact type of on-machine measuring system is developed in order to measure aspherical optical parts with steep surface angle for large numerical aperture (NA). A ceramic air slider made of SIALON is adopted for the measurement probe because of its low thermal expansion coefficient, high rigidity and light weight. A high accuracy glass scale is employed to reduce the thermal drift of the displacement gauge. The air slider or the measuring probe is tilted for 45° against the aspherical workpiece axis, and the probe is scanned over the workpiece surface, so as to keep the contact angle between the probe axis and the contact surface constant in order to reduce the change in the probe friction force. © 2008.

    DOI: 10.1016/j.cirp.2008.03.041

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  • Precision grinding of microarray lens molding die with 4-axes controlled microwheel 査読

    Yuji Yamamoto, Hirofumi Suzuki, Takashi Onishi, Tadashi Okino, Toshimichi Moriwaki

    SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS   8 ( 3 )   173 - 176   2007年4月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:NATL INST MATERIALS SCIENCE  

    This paper deals with precision grinding of microarray lens (fly eye) molding die by using a resinoid bonded diamond wheel. An ultra-precision grinding system of microarray lens molding die and new truing method of resinoid bonded diamond wheel were developed. In this system, a grinding wheel was four-dimensionally controlled with 1 nm resolution by linear scale feedback system and scanned on the workpiece surface. New truing method by using a vanadium alloy tool was developed and its performance was obtained with high preciseness and low wheel wear. Finally, the microarray lens molding dies of fine grain tungsten carbide (WC) was tested with the resinoid bonded diamond wheel to evaluate grinding performance. (C) 2007 Published by NIMS and Elsevier Ltd.

    DOI: 10.1016/j.stam.2007.02.007

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  • マイクロ円筒トラバース研削の高精度化に関する研究 査読

    大橋一仁, 何 桂馥, 光尾 崇, 吉原啓太, 大西 孝, 塚本真也

    砥粒加工学会誌   50 ( 6 )   334 - 339   2006年6月

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    記述言語:日本語   掲載種別:研究論文(国際会議プロシーディングス)  

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受賞

  • 18th International Conference on Precision Engineering (ICPE2020) Best Paper Award

    2020年11月   精密工学会  

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  • 奨励賞

    2014年9月   砥粒加工学会  

    大西 孝

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  • 工作機械技術振興賞(奨励賞)

    2014年6月   工作機械技術振興財団  

    大西 孝

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  • マザック高度生産システム優秀論文賞

    2012年6月   マザック財団  

    大西 孝

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  • The 14th International Machine Tool Engineers’ Conference, Excellent Poster Award

    2010年10月  

    大西 孝

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  • 工作機械技術振興賞(論文賞)

    2007年6月   工作機械技術振興財団  

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  • 論文賞

    2007年3月   砥粒加工学会  

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担当授業科目

  • 技術表現法 (2021年度) 第4学期  - 月3,月4,木1,木2

  • 技術表現法 (2021年度) 第4学期  - 月3~4,木1~2

  • 機械システム工学演習1 (2021年度) 前期  - その他

  • 機械システム工学演習2 (2021年度) 後期  - その他

  • 技術表現法 (2020年度) 第4学期  - 月3,月4,木1,木2

  • 技術表現法 (2020年度) 第4学期  - 月3,月4,木1,木2

  • 機械システム工学演習1 (2020年度) 前期  - その他

  • 機械システム工学演習2 (2020年度) 後期  - その他

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