研究者詳細 - 大橋　一仁

Fundamental study on the precision abrasive machining using a cavitation in reversing suction flow 査読

Kazuhito Ohashi, Rongjun Wang, Hiroyuki Hasegawa, Shinya Tsukamoto

Key Engineering Materials 389-390 223 - 228 2009年1月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：TRANS TECH PUBLICATIONS LTD

The purpose of this study is to make clear the machining effect of the precision abrasive machining using the cavitation in reversing suction flow, which can easily finish to a fine surface by a simple apparatus. The machining fluid including loose micro abrasive grains is sucked by a pump, and the cavitation occurs ahead of the nozzle fixed in the suction chamber because of the rapid decrease of pressure of machining fluid. We use the cavitation impact to make the abrasive grains to interfere with the workpiece surface. In this report, the possibility of application of the new abrasive machining to the precision manufacturing is investigated by analyzing the behavior of machining fluid, the stock removal and the surface finish in machining of glass. The cavitation impact is strongest under the nozzle clearance of 20mm and restriction nozzle diameter of 4mm. Glass surface is finished up to several nanometers in Ry with slight stock removal by the proposed abrasive machining.

DOI： 10.4028/0-87849-364-6.223

The possibility of dressless restoration of grindactivity in dry grinding of carbon 査読

K. Ohashi, Y. Sumimoto, Y. Fujita, H. Hasegawa, S. Tsukamoto

Key Engineering Materials 389-390 356 - 361 2009年1月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：TRANS TECH PUBLICATIONS LTD

The grinding performance of wheel remarkably decreases by the loading of wheel surface in dry grinding of hard carbon parts. In this report, we propose the removal method of loaded carbon chips in which an adhesive tape is removed with carbon chips after putting on a loaded wheel surface by an elastic roller with the setting load . The removal characteristics are experimentally investigated by analyzing the projecting height of abrasive grains, removal force of adhesive tape and so on. The removal method results in the enough projecting height of abrasive grain.

DOI： 10.4028/0-87849-364-6.356

熱電効果を利用した円筒研削面粗さの高速オンマシン測定法査読

大橋一仁, 永田龍, 塚本真也, 長谷川裕之

砥粒加工学会誌 52 ( 12 ) 724 - 729 2008年12月

クーラント汚染度とワーク表面品位との相関研究第1報:スラッジおよび砥粒のスクラッチ形成に及ぼす影響査読

長谷川裕之, 岡本敏宏, 千葉陽介, 大橋一仁, 塚本真也, 西澤信也, 藤田能裕, 宮川和彦

砥粒加工学会誌 52 ( 10 ) 589 - 594 2008年10月

記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：社団法人砥粒加工学会

本研究では，表面精度を決定づける新たな要因として，研削時に生成されるスラッジと砥石から脱落する砥粒が工作物の表面性状を損なわせるとの仮定に基づき，スラッジおよび砥粒により意図的に汚染させた研削液と加工後の工作物表面品位との相関を明らかにした．特に，生産現場において問題となるスクラッチに焦点を絞り，スラッジ濃度または砥粒濃度に対するスクラッチ個数を体系的にまとめた．実験結果からスラッジによる汚染に伴い，スクラッチ個数は単調に増加し，スラッジ濃度50×10⁷/lにおいて一定値となった．一方，砥粒はスクラッチ発生数に支配的に関与し，スラッジに比べ40倍以上の影響を与えた．さらに，光学顕微鏡による観察結果から，研削液の汚染により発生するスクラッチ形状は2種類に分類され，スラッジによる汚染では直線型，砥粒による汚染では曲線型が主に形成された．

DOI： 10.11420/jsat.52.589

エンドミル切削における電気防錆加工法の開発-切削加工における水のみを使用した環境調和型加工法- 査読

西川尚宏, 塚本真也, 大橋一仁, 三宅隆介, 井山俊郎, 水野雅裕

環境技術 37 ( 4 ) 274 - 281 2008年4月

記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：環境技術学会

機械加工現場において，切削油や水溶性切削油剤といった加工液は作業者に健康被害を及ぼす懸念があり，廃棄の際に莫大な廃液処理コストと環境負荷を生じている.本研究では加工液に無害な水のみを使用し，防錆剤を用いず工作物に致命的な錆を微小電流で防ぐ電気防錆加工法を生産現場で多用される切削加工に応用し，実験的にその効果を検討した適切な電極組み合わせと定電流制御により安定した電流供給を実現し，最長3時間の防錆を達成した.また，有効防錆領域を解明し1時間の防錆電力は0.0122Wと省電力で使用上十分な防錆効果があり，その際，危惧される工作物の水素脆性を検証し実用上安全であることが示された.さらに，工作物を水中に浸漬して切削する本加工法と従来加工法との切削性能を比較し軽切削において切削油には劣るが水溶性切削油剤より表面粗さが改善する結果を得た.本加工法は新しい環境調和型加工法として期待性があるといえる.In a machining plant, cutting fluids, such as water immiscible or miscible types are in danger of harming an operator's health. Moreover, infinite cost and heavy environmental loading have arisen as issues for waste fluid disposal treatment. The electric rust prevention machining method has prevented the fatal rust of work piecesby supplying a slight electric current while using only harmless water and non-using rust preventive agent. The application of this method to the end mill cutting is being experimentally investigated. A stable electric current supply is realized by using a constant current control and an appropriate electrode combination. In addition, this method achieved rust prevention of work pieces for 3 hours. Moreover, an effective rustprevention time and current area of 1 hour is clarified and rust prevention power is indicated as a low O.0122W. Afterwards, it was evaluated that hydrogen embrittlement of work piece was safe in practical use. Subsequently, cutting performance using this method as machining on a work piece dipped in water is compared with conventional cutting methods. When performing light cutting, this method is inferior to a waterimmiscible cutting fluid, however surface roughness is improved more than with a water miscible cutting fluid.Therefore. this method is considered to have potential as a the new environmental harmonic machiningme出.od

DOI： 10.5956/jriet.37.274

その他リンク： http://id.nii.ac.jp/1399/00010265/

吸引キャビテーション援用砥粒加工を用いたマイクロパターニング査読

大橋一仁, WANG Rongjun, 松岡紘一, 田口雅也, 塚本真也

砥粒加工学会誌 52 ( 3 ) 158 - 163 2008年3月

Characterization of quaternary (Cr,Al)N-based films synthesized by the cathodic arc method 査読

H. Hasegawa, K. Ohashi, S. Tsukamoto, T. Sato, T. Suzuki

Surface and Coatings Technology 202 ( 4-7 ) 786 - 789 2007年12月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：ELSEVIER SCIENCE SA

Chromium aluminum nitride based films were synthesized by the cathodic arc method using an alloy cathode, and annealed in a vacuum chamber at 800, 900 and 1000 °C. XRD analyses showed that the (Cr,Al,Si,Y)N films maintained a cubic phase up to 800 °C, but changed to a mixed phase after post-annealing at temperatures of more than 900 °C. Cr2N segregation and partial transformation from a cubic to hexagonal phase at over 800 °C were confirmed for (Cr,Al,Si)N and (Cr,Al,Y)N. The lattice parameters for cubic (Cr,Al,Si)N and (Cr,Al,Y)N (0.416 nm) decreased to 0.411 nm and 0.413 nm, respectively, after annealing at 900 °C. The lattice parameter for (Cr,Al,Si,Y)N changed from 0.417 nm to 0.413 nm after annealing at 900 °C. The microhardness of (Cr,Al,Y)N was kept constant at 800 °C, whereas that of (Cr,Al,Si)N and (Cr,Al,Si,Y)N increased slightly between 800 and 900 °C. In this study, hardness, microstructure and lattice parameters were analyzed and discussed as a function of the annealing temperature. © 2007 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.surfcoat.2007.05.050

Novel On-Machine Measurement of Surface Finish with Thermoelectric Effect for Rotating Ground Workpiece 査読

K. OHASHI, R. NAGATA, S. TSUKAMOTO, H. HASEGAWA

Advance in Abrasive Technology ( X ) 519 - 525 2007年9月

Improvement of Machining Accuracy in Micro Cylindrical Traverse Grinding 査読

K. Ohashi, G. He, S.Tsukamoto

Key Engineering Materials 329 39 - 44 2007年9月

日本語力の徹底訓練による教育法査読

塚本真也, 大橋一仁, 東辻浩夫

工学教育 55 ( 1 ) 2007年

Grinding process for the finest surface finish with super-soft grade resinoid bond wheel 査読

Ohashi Kazuhito, Tsukamoto Shinya, Nakajima Toshikatsu

ICPMT2006 - Progress of Machining Technology - Proceedings of the 8th International Conference on Progress of Machining Technology 417 - 420 2006年11月

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：JAPAN SOC PRECISION ENGINEERING-JSPE

The polyvinyl alcohol (PVA) bond wheel is a typical elastic wheel using in precision finishing of a cylinder, a roll, a magnetic head and so on, but it can't allow using grinding fluid because of its too poor water resistance. So the super-soft grade resinoid wheel, of which the bonding material is prepared by the interaction of PVA and thermosetting plastics, is developed. The surface roughness decreases down to the minimum just after the start of plunge grinding. In this paper, the grinding method with the resinoid bond wheel is proposed to achieve the finest surface finish of workpiece, based on such minimizing phenomenon of surface roughness. Main conclusions obtained in this paper are as follows: (1) The finest surface finish can be obtained by spark-out grinding operation just at the right moment when the surface roughness of workpiece decreases down to the minimum. (2) The surface finish by this grinding operation decreases with decreasing the initial surface roughness, but the shrinkage in surface roughness during the spark-out grinding process increases with increasing initial surface roughness. (3) The repetition of this grinding operation without dressing makes the surface finish smaller than that by a general grinding operation with larger depth of cut before spark-out grinding.

Fundamental study on a cavitation aided machining 査読

Kazuhito Ohashi, Rongjun Wang, Shinya Tsukamoto, Toshikatsu Nakajima

ICPMT2006 - Progress of Machining Technology - Proceedings of the 8th International Conference on Progress of Machining Technology 405 - 408 2006年11月

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：JAPAN SOC PRECISION ENGINEERING-JSPE

The purpose of this study is to make clear the machining effect of a new technique of cavitation aided machining (CAM) by which the workpiece can be easily finished in a fine surface with a very simple apparatus. The machining fluid, that is mixture of abrasive grains and water as carrier, is sucked by a pump, and the flow of machining fluid is controlled by a restrictor. Then the cavitation phenomenon locally occurs by the rapid decrease of carrier pressure, so that abrasive grains in the mixed fluid come to interfere on the surface. In this report, the possibility of applying CAM to precision machining is investigated by analyzing the surface finish, the stock removal and the behavior of carrier. Main conclusions obtained in this paper are as follows: (1) Action of abrasive grains onto the surface is induced by very fine cavitation impact caused by cavitation occurred in the lower part from the center of restrictor in a flow. (2) At 2.0mm in clearance, the cavitation impact of carrier becomes strongest, so that the stock removal and the decrease of surface roughness have maximum. (3) CAM can be applied to an ultraprecision machining by which the surface finish of Al-Mg alloy is improved from 7.3nm Ra with ultraprecision cutting down to the surface finish at 6.6nm Ra.

深穴内面オシレーション研削における砥石と工作物の熱変形挙動査読

大橋一仁, HE Guifu, 小野祐一郎, 塚本真也, 中島利勝

砥粒加工学会誌 50 ( 7 ) 409 - 414 2006年7月

記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：社団法人砥粒加工学会

深穴内面研削では，工作物に大きなテーパ形状と中凹形状が形成され，これらの低減が形状精度に関する重要課題になっており，その要因の一つに，熱的に過酷な研削環境による工作物の熱変形が挙げられる．本研究では，深穴内面オシレーション研削において工作物の形状精度に影響を及ぼす砥石ならびに工作物の熱変形挙動を実験的に解明している．工作物の熱変形量は，工作物端部から中央部になるほど増大するが，チャック保持側端部の熱変形量は残留しやすく，このような工作物の熱変形は冷却に伴って工作物断面のテーパ

DOI： 10.11420/jsat.50.409

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, HE Guifu, 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

記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：社団法人砥粒加工学会

マイクロ円筒部品の研削加工においては，工作物径が微少であることによって剛性が極端に小さくなるため，加工中の研削抵抗による工作物の弾性変形が通常の研削の場合に比べて相対的に大きくなり，加工能率や加工精度に大きく影響するようになる．工作物に作用する研削抵抗の主体を占めるのは砥粒の切削方向に対する法線分力であるが，これを工作物剛性の高い方向に作用させることで工作物の変形を抑制できることが予測される．そこで本研究では，マイクロ円筒トラバース研削に直交軸方式を提案し，幾何学的切りくず形状などの解析によって従来のマクロサイズの円筒研削に多用される平行軸方式と比較検討している．さらに，試作したマイクロ円筒研削盤を用いてトラバース研削実験を行った結果，表面粗さや形状精度において直交軸方式が平行軸方式に比べて良好であることを明らかにしている．

DOI： 10.11420/jsat.50.334

内面研削における電気防錆加工法の開発-加工液に水のみを使用するエコマシニングの提案- 査読

西川尚宏, 大橋一仁, 吉原啓太, 塚本真也

環境技術 35 ( 6 ) 452 - 459 2006年6月

電気防錆水中保管法の開発-防錆剤・油剤を使わない水による金属部品保管法の提唱- 査読

西川尚宏, 大橋一仁, 須藤将仁, 塚本真也

環境技術 35 ( 5 ) 371 - 377 2006年5月

Development of electric rust preventive machining method in cylindrical grinding 査読

Naohiro Nishikawa, Kazuhito Ohashi, Shinya Tsukamoto, Toshikatsu Nakajima

LEM 2005 - 3rd International Conference on Leading Edge Manufacturing in 21st Century 2005 ( 0 ) 653 - 658 2005年10月

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：The Japan Society of Mechanical Engineers

The electricity rust preventive machining method is proposed to effective prevents the workpiece from rusting in the cylindrical grinding only with water. The workpiece as a cathode is protected from rusting by supplying the electric current through the water. This method leads to the ecology machining because the water without extreme pressure agents, mineral oils and so on included in conventional machining fluid. Therefore, this method saves much work in a treatment of stale machining fluid. In this paper, the electric rust preventive machining method is developed and investigated its application to cylindrical grinding.

DOI： 10.1299/jsmelem.2005.2.653

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