研究一覧（2008年1月〜12月）

Thermal deformation of base sheet and local deformation around laser cutting edge
　　Masayuki NUNOBIKI, Koichi OKUDA and Shogo Morino
　　 Key Engineering Materials Vols.389-390 pp.404-409 (2008)

When many products were cut out from a wide base sheet by laser cutting in some conditions, an error occurred in a height regulator by the sheet's greatly bending. It is necessary to avoid occurring the error at unmanned processing. We paper investigated local deformation around cutting edge. The cutting path consists of piercing point, terminal point, straight lines, cranks and curves. We measured local deformation around terminal point, crank and straight line. It was clarified that base sheet bent greatly around terminal points and crank and the sheet curved gradually along the straight line. We investigated relationship between global deformation of the base sheet and the　local deformation. It was able to presume the entire deformation of base sheet by overlapping the individual deformations around cutting edge.

Micro-Burr Formation in Ultra-Precision Cutting
　　Koichi Okuda, Hideki Shibahara, Masahito Miypshi
　　Proceedings of international conference of the european society for precision engineering and nanotechnology, Vol.2, 2008, pp.68-71 (2008)

This paper describes an influence of cutting conditions on a micro burr formation in an ultra-precision cutting of copper and aluminium. In this work, the cutting experiments with diamond tools were performed to investigate the burr formation in micro cutting and the influence of a depth of cut, a feed rate, a tool edge sharpness and a work material property was discussed. It was observed that a roll-over type burr was formed even in cutting of brittle work material such as 6-4 brass. And it was found that the size of burr increases with an increase in depth of cut and radius of cutting edge.

窒素ブロー方式による高送りミーリング時の工具寿命改善

　　*静　弘生，*鈴木康夫，*酒井克彦
　　*静岡大学
　　精密工学会誌vol.74,12 pp.1292-1297（2008）

If the cutting speed is high, the cutting temperature will also be high and that may reduce the tool life remarkably. However, use of a cutting fluid in high-cutting speed conditions will increase the thermal shock and can cause thermal cracks in the tool, thus resulting in increased tool wear. In this study, the heat generated by oxidation during cutting was suppressed by blowing nitrogen gas onto the cutting point in order to lower the cutting temperature and thus to prolong the tool life. As result, blowing nitrogen gas during cutting operations at high speeds and high feed rates, increased the tool life about two times, which allowed higher speeds and higher feed rates, thus reducing the total cutting time required. It was found that the blowing nitrogen gas makes it possible to improve productivity in a high-speed, high-feed rate milling operation.

窒素ガスを用いた切削加工に関する研究―凝着問題の改善と工具摩耗に関する検討―

　　*静　弘生，*鈴木康夫，*酒井克彦
　　*静岡大学
　　精密工学会誌vol.74，7 pp.730-734 (2008)

If the cutting speed is high, the cutting temperature will also be high and that may reduce the tool life remarkably. However, use of a cutting fluid in high-cutting speed conditions will increase the thermal shock and can cause thermal cracks in the tool, thus resulting in increased tool wear. In this study, the heat generated by oxidation during cutting was suppressed by blowing nitrogen gas onto the cutting point in order to lower the cutting temperature and thus to prolong the tool life. As result, blowing nitrogen gas during cutting operations at high speeds and high feed rates, increased the tool life about two times, which allowed higher speeds and higher feed rates, thus reducing the total cutting time required. It was found that the blowing nitrogen gas makes it possible to improve productivity in a high-speed, high-feed rate milling operation.

エアタービン駆動主軸の回転特性を利用したマイクロエンドミルの切削トルク検出
　　柴原豪紀，熊谷幹人，宮島義嗣，幸田盛堂，奥田孝一
　　2008 年度精密工学会春季大会学術講演会講演論文集，pp.601-602 (2008)

デジタルものづくり実習実施に向けての取り組み
　　奥田孝一，本田逸郎
　　日本工学教育協会　平成20年度工学・工業教育研究講演会講演論文集，pp.86-87 (2008)

レーザフォーミングによるチタン板の金型レス曲面加工
　　蓬莱康佑，奥田孝一，布引雅之
　　精密工学会2008年度関西地方定期学術講演会後援論文集，pp.59-60 (2008)

微小径エンドミル加工における加工精度の改善
　柴原豪紀，熊谷幹人，宮島義嗣，幸田盛堂，奥田孝一
　　2008 年度砥粒加工学会学術講演会講演論文集，pp.209-210 (2008)

微小径エンドミル加工の状態監視
　　柴原豪紀，熊谷幹人，幸田盛堂，奥田孝一
　　第13回国際工作機械技術者会議論文集，pp.108-109 (2008)

高硬度材の微小径エンドミル加工における切削現象
　　柴原豪紀，稲田泰仁，布引雅之，奥田孝一
　　日本機械学会第7回生産加工・工作機械部門講演会講演論文集，pp.61-62 (2008)

りん青銅の超精密ダイヤモンド切削仕上面における結晶粒界段差の生成
　　奥田孝一
　　第48回銅及び銅合金技術研究会講演大会講演概要集，pp.88-89 (2008)

レーザ切断加工部周辺に生じる熱変形
　　布引雅之
　　2008 年度精密工学会春季大会学術講演会講演論文集，pp.1111-1112 (2008)

レーザ切断部周辺の変形が被加工母材の変形におよぼす影響
　　布引雅之，森野省吾，奥田孝一
　　2008 年度精密工学会春季大会学術講演会講演論文集，pp.1133-1134 (2008)

方策の初期値設定にファジィ推論を用いた強化学習
　　太田雅之、布引雅之、奥田孝一
　　第26回日本ロボット学会学術講演会、RSJ08-0484 (2008)

窒素ガスブローを用いた断続旋削加工に関する研究
　　*田口敬之，*鈴木康夫，*酒井克彦，*静弘生
　　*静岡大学
　　日本機械学会[No..08-19]第7回生産加工・工作機械部門講演会pp.179-180 (2008)

窒素ガス援用による切削加工の高度化に関する研究
　　*静　弘生
　　*静岡大学
　　静岡大学博士論文 (2008)

高機能・高品質な機械加工品製作のための切削におけるバリ発生のメカニズムとエッジ品質の向上
　　奥田孝一
　　ISS産業科学システムズセミナー講演テキスト, pp. 1-65 (2008)

切削加工におけるバリ生成とそのメカニズム
　　奥田孝一
　　(独)中小企業基盤整備機構「バリとりの最先端」セミナー講演テキスト, pp. 1-13 (2008)



マイクロ・ナノ機械加工
　　奥田孝一
　　日本設備管理学会ナノマイクロ加工研究会　講演資料, pp. 1-19 (2008)

バリ取り・エッジ仕上げ・表面仕上げについて〜バリの発生メカニズムから抑制、除去技術へ〜
　　奥田孝一
　　第12回機械要素技術展バリ取り・表面仕上げフェア専門セミナー基調講演資料, pp. 1-42 (2008)
　　第11回関西機械要素技術展バリ取り・表面仕上げフェア専門セミナー基調講演資料, pp. 1-42 (2008)

CO₂レーザを用いた薄板の曲げ加工　−金型を用いない変形加工の可能性−
　　奥田孝一
　　川崎重工協力会社研修セミナー (2007)

最近の機械加工技術あれこれ
　　奥田孝一
　　先進的ものづくり研究会平成20年度 第2回技術講演会資料, pp. 1-27 (2008)