研究一覧（2007年1月〜12月）
Study of Influence of Laser Cutting Sequence upon Thermal Deformation of a Base Sheet
Masayuki NUNOBIKI, Koichi OKUDA and Toshiyuki YOSHIDA
Journal of Advanced Mechanical Design, Systems and Manufacturing, 1, pp. 368- 377 (2007)
In case that a lot of products were cut out from a wide base sheet by laser cutting, the sheet had been much deformed so that the error occurred in a height regulator. This paper deals with thermal deformation of a base sheet caused by laser cutting. We clarified that the thermal deformation was influenced by the cutting sequence in the case of SUS304 sheets of 1mm thickness. The workpieces bent upward in inward sequence, and the workpieces bent downward in outward sequence. It was expected that the deformation was able to be controlled by cutting sequence.
CO2レーザフォーミングにおける純チタン板の曲げ変形特性
奥田孝一，杉江悠一，布引雅之
砥粒加工学会誌, 51, pp. 522-526 (2007)
This study deals with behavior of bending deformation in CO2 laser forming process of titanium. CO2 laser forming technique was applied for a pure titanium plate with thickness of 1 mm to aim the development of new bending process. The experiments of laser forming were carried out with a CO2 laser machine. The bending angle and the temperature of workpiece were examined under the condition of various laser power, feed speed and laser spot diameter. Based on the experimental results, it was found that the bending deformation behaved greatly depending on the laser power and the laser spot diameter. The bending angle increased with an increase in the laser power. The bending direction tended to change from the laser irradiation side to its opposite side when the large laser spot diameter was applied.
微小形状部品用炭素工具鋼の精密切削における被削性
奥田孝一，竹野恵永
砥粒加工学会誌, 51, pp. 527-530 (2007)
High accuracy and high efficiency machining of micro parts such as a contact probe for a current inspection of semiconductor is increasingly demanded. In this study, we have focused on a micro cutting technology of a carbon tool steel which is a typical material for a contact probe. In order to put the precision cutting of the high strength material into practice, it is essential to understand the micro cutting phenomenon such as the surface texture, the tool wear with small depth of cut and low cutting speed. Then, the precision cutting experiments of a carbon tool steel (SK105) by titanium carbide and ultra-fine grained tungsten carbide tools were carried out with an ultra-precision cutting machine. It was found that the feed rate, the cutting speed and the edge sharpness of tool significantly influence the surface finish.
An Influence of Tool Run-Out on Mold Surface Texture
Hideki Shibahara, *Mikito Kumagai, *Seido Kohda and Koichi Okuda
*OKK Co.
Proc. of Precision Grinding and Abrasive Technology At SME International Grinding Conference, pp. 131-137 (2007)
This paper deals with an influence of the motion characteristics of NC machine tools on the machined surface. The mold surface texture by a ball end-mill is analyzed by a simulation in combination with the measurement results of the motion characteristics. By comparing the simulated results with the actual machined surface, the influence of the motion characteristics of NC machine tools on the surface texture is evaluated. As a result, it has been verified by the proposed simulation method that the surface roughness is able to be predicted with the error less than 0.5μm. It has been also found that the tool run-out hardly affects the machined surface texture in a low feed rate condition and the surface roughness became a minimum at the tool tilt angle of 5 degrees when the ball end-mill with a large run-out is used.
Application of Ultra-Precision Diamond Cutting for Fabrication of Cylindrical Micro Coil Line
Koichi Okuda, *Naoki Fujiwara, **Yuichiro Sumiyoshi, ***Tadashi Hattori
*Dainippon Screen MFG Co.
**Japan Advanced Institute of Science and Technology
***Lab. of Advanced Science and Technology for Industry
Proc. of the 4th International Conference on Leading Edge Manufacturing in 21st Century , pp.741-746 (2007)
This paper describes an application of ultra-precision diamond cutting for a cylindrical micro coil line in a fabrication process by lithography. The coil lines fabricated by UV or X-ray lithography are electroplated by nickel and copper. The direct cutting of the resist and electroplating structure by diamond tool is attempted to finish the flat surface. The fluctuation of the resist thickness is reduced to 1?m or less by diamond cutting. By applying the diamond cutting operation in the conventional lithograph process, the micro coil with the line-and-space of 30?m is fabricated.
X 線タルボ干渉計用回折格子の作製
田中誠人，*野田大二，奥田孝一，**武田佳彦，***矢代 航，***百生 敦，*服部正
*高度研
**筑波大学
***東京大学
2007年度精密工学会春季大会学術講演会講演論文集, pp.1097-1098 (2007)
円筒型マイクロコイルラインの高アスペクト比化とソレノイドアクチュエータへの応用
山下修平，松本吉史，瀬戸本豊，奥田孝一，*野田大二，*服部正
*高度研
2007年度精密工学会春季大会学術講演会講演論文集, pp.1107-1109 (2007)
工作機械垂直案内面のロストモーション特性
*柴原豪紀，*熊谷幹人，*椙尾茂樹，*幸田盛堂，奥田孝一
*大阪機工(株)
2007年度精密工学会春季大会学術講演会講演論文集, pp.133-134 (2007)
多リンクロボットの経路決定を行う強化学習に関する研究−ユーザの意図を表す複数報酬に基づく強化学習―
布引雅之，奥田孝一，小谷直樹
2007年度精密工学会春季大会学術講演会講演論文集, pp.1159-1160 (2007)
マイクロエンドミルを用いた微細溝加工に関する研究
恒吉辰典，苗村浩，奥田孝一
精密工学会2007年度関西地方定期学術講演会講演論文集，pp.45-46 (2007)
工作機械垂直軸送り系剛性がロストモーション特性に及ぼす影響
*柴原豪紀，*幸田盛堂，*熊谷幹人，*椙尾茂樹，奥田孝一
*大阪機工(株)
日本機械学会2007年度年次大会講演論文集(IV)，pp.297-298 (2007)
レーザ切断部周辺に生じる母材の熱変形に関する研究
布引雅之，森野省吾，奥田孝一
日本機械学会2007年度年次大会講演論文集(IV)，pp.279-280 (2007)
方策の初期値をニューラルネットに類推させる強化学習に関する研究
布引雅之，太田雅之，奥田孝一
日本機械学会2007年度年次大会講演論文集(VII)，pp.265-266 (2007)
レーザを応用したシリコンの曲げ加工
奥田孝一，角南克哉，布引雅之
2007年度精密工学会秋季大会学術講演会講演論文集，pp.985-986 (2007)
レーザを用いたスリット部のドロス除去ならびに面取りに関する研究
布引雅之，木次陽亮，奥田孝一
2007年度精密工学会秋季大会学術講演会講演論文集，pp.993-994 (2007)
超精密切削における仕上げ面性状に及ぼす被削材組織の影響
奥田孝一
日本鉄鋼協会第154回秋季講演大会講演論文集，p.1000 (2007)
高品質な製品供給に欠かせないバリ取り・エッジ仕上げ
奥田孝一
日刊工業新聞記事（2007年1月12日朝刊）
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テキスト、 pp. 1-52 (2007)
部品の高機能化・微小化に対応するための切削加工基礎講座
奥田孝一
日本テクノセンター切削加工セミナーテキスト，pp.1-50 (2007)
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)
精密切削におけるバリ生成とそのメカニズム
奥田孝一
第10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 (2007)
超精密切削加工における仕上面生成ならびに切りくず生成
奥田孝一
兵庫県機械技術研究会「難削材の切削加工に関する技術講演会」 (2007)
マイクロエンドミルによる微細溝加工に関する研究
奥田孝一
平成19年度兵庫県COEプログラム推進事業 「極微小径工具開発」推進委員会 (2007)
超精密切削加工とリソグラフィーを組み合わせた微細加工技術
奥田孝一
第8回<池田銀行>TOYRO ビジネスマッチングフェア (2007)
高硬度鉄系材料の微細形状部品の精密切削
奥田孝一
2007年度関西大学連続セミナー「ものづくりの基盤技術」 (2007)
切削加工におけるバリ生成のメカニズムと抑制技術
奥田孝一
日本テクノセンターバリセミナーテキスト，pp.1-50 (2007)