研究者詳細 - 大橋　一仁

論文 - 大橋　一仁

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Educational effects of creative thinking method in design project

Shinya Tsukamoto, Kazuhito Ohashi, Seiichi Washio, Tashiyuki Torii, Akira Inoue

Proceedings of the SICE Annual Conference 1055 - 1059 2005年

掲載種別：研究論文（国際会議プロシーディングス）

This report shows the practical educational effects of the design project to build up a jumping machine through PBL (Project-Based Learning) that trains students' inquisitiveness and creativity. Particularly, we report in detail that measuring the initial value of students' creativity is indispensable for them to realize the importance of inquisitiveness and creativity, ant that learning creative thinking methods wipes out students' perplexity and repulsion toward Open-ended problems and enhances educational effects. © 2005 SICE.

Proposal of Electricity Rust Preventive Machining Method in Cylindrical Grinding - Antirust Effect of Workpiece in Grinding with Water -

Shinya Tsukamoto, Kazuhito Ohashi, Naohiro Nishikawa, Masahito Sudou, Takanori Kubo, Toshikatsu Nakajima

Seimitsu Kogaku Kaishi/Journal of the Japan Society for Precision Engineering 71 ( 3 ) 320 - 324 2005年

掲載種別：研究論文（学術雑誌）

The electricity rust preventive machining method is proposed to effective prevent the workpiece from rusting in the cylindrical grinding only with water. The workpiece as a cathode is preserved 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 the like is used as the machining fluid. Therefore, this method saves much work for a treatment of used machining fluid. Main conclusions obtained are as follows: (1) The effective prevention from rusting for 1 hour can be achieved by the electricity rust preventive machining method in cylindrical grinding. (2) The effective rust prevention conditions of electric supplying time and current are experimentally decided in cylindrical grinding and a very few electric power is necessary for rust prevention. (3) The supply current for the rust prevention increases with increasing the voltage, the nozzle-workpiece clearance or the exposed surface area. And the turbulent flow of water interferes with the supply of the current which increased with increasing the water flow rate. © 2005, The Japan Society for Precision Engineering. All rights reserved.

DOI： 10.2493/jjspe.71.320

Minimizing Process of Surface Roughness in Grinding with Super-soft Grade Resinoid Wheel 査読

K.Ohashi, S.Tsukamoto, T.Nakajima

Proceedings of The 7th International Conference on Progress of Machining Technology 122 - 127 2004年12月

Transition of Form Accuracy in Cylindrical Plunge Grinding Process of Ti-Ni Alloy 査読

K.Ohashi, S.Tsukamoto, Guifu HE, T.Nakajima

Proceedings of The 7th International Conference on Progress of Machining Technology 50 - 55 2004年12月

極軟質レジノイド砥石による表面あらさ改善過程の研究(第2報) : 表面あらさ極小化現象を利用した仕上加工法の提案査読

大橋一仁, 西川亮太, 塚本真也, 多田憲倫, 中島利勝

精密工学会誌論文集 = Journal of the Japan Society for Precision Engineering Contributed Papers 70 ( 10 ) 1291 - 1295 2004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：公益社団法人精密工学会

The surface roughness decreases down to the minimum just after start of plunge grinding with a super-soft grade resinoid bond wheel, of which bonding material is prepared by the interaction of polyvinyl alcohol and thermosetting plastics. In this paper, the grinding method with the resinoid bond wheel is investigated for 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 is obtained by spark-out grinding operation starting just at the moment on which 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 decrease 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.

DOI： 10.2493/jspe.70.1291

内面研削の深穴オシレーション加工における最適形状制御法の開発査読

塚本真也, 大橋一仁, 吉原啓太, 吉田哲弘, 中島利勝

精密工学会誌 70 ( 2 ) 263 - 268 2004年2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：公益社団法人精密工学会

In the case of internal oscillation grinding of deep straight hole which is longer than a wheel width, a workpiece is finished in a taper shape because of a larger elastic deformation of wheel spindle in grinding process. In this paper, the controlled internal oscillation grinding technique for optimal form accuracy of a deep straight hole is developed, introducing retraction grinding method in which a grinding wheel head rapidly retracts a small amount against infeed direction at the beginning of spark-out grinding. Main conclusions obtained in this paper are as follows; (1) In internal grinding of a deep straight hole with retraction motion, the setting retraction amount is decided by the wheel spindle recovery which is almost in direct proportion to the retraction amount. (2) At the optimal retraction amount finishing a workpiece to a minimum taper error, the elastic deformation of wheel spindle just after retraction motion is constant decided by the grinding system even if the plunge speed or the speed ratio are different. (3) The optimal retraction amount is decided by subtracting the above own elastic deformation of wheel spindle from the elastic deformation of wheel spindle just before the beginning of spark-out grinding process without retraction motion.

DOI： 10.2493/jspe.70.263

Retraction Grinding Method for Reducing Taper Error in Deep Hole Oscillation Grinding 査読

Tsukamoto Shinya, Ohashi Kazuhito, Nakajima Toshikatsu

Proceedings of International Conference on Leading Edge Manufacturing in 21st century : LEM21 2003 ( 0 ) 263 - 268 2003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：一般社団法人日本機械学会

In this paper, the retraction grinding method, in which the grinding wheel head gets rapidly back by very small amount immediately after the beginning of spark-out state, is proposed for improving the taper error in the deep hole oscillation internal grinding. Main conclusions obtained are as follows : (1) It is made clear that by the retraction grinding method the taper error of workpiece can remarkably be improved with the fine surface roughness condition. (2) In the retraction grinding the taper generation mechanism is affected just by extending of spark-out grinding time due to a decrease of the residual stock on the stiffness of the grinding wheel and workpiece spindles. (3) By taking into account the periodic change of the normal grinding force linking to the oscillation movement, the measured taper can sufficiently be predicted.

DOI： 10.1299/jsmelem.2003.263

Development of the Electricity Rust Preventive Machining Method in Surface Grinding 査読

S.Tsukamoto, N.Nishikawa, K.Okamoto, K.Ohashi

Key Engineering Materials 257-258 483 - 488 2003年11月

Grain Boundary Step Generation in Ultraprecision Cutting of Al-Mg Alloy 査読

K.Ohashi, M.Yoshikawa, S.Tsuka-moto, T.Nakajima

Proceedings of the International Conference on Leading Edge Manufacturing in 21st Century 2003 327 - 332 2003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：一般社団法人日本機械学会

In this study, the characteristics of grain boundary step generation in practical ultraprecision cutting opreration of Al-Mg alloy are experimentally made clear by analyzing height of grain boundary step, crystal direction, surface finish, residual stress and so on. Especially, crystal direction of each crystal grain of Al-Mg alloy appearing on finished surface is decided by ECP (Electron channeling pattern) method, and relationships between crystal orientation and height of grain boundary step are investigated. Main conclusions obtained in this study are as follows : (1) The height of grain boundary step on finished surface increases with a closen crystal orientation to (1 2 4) on the stereographic projection of crystal direction of Al-Mg alloy. (2) The height of grain boundary step or the surface finish decrease with a decrease of clearance angle of cutting tool. So a cutting tool with a smaller clearance angle results in finer machined surface.

電解研削加工における加工変質層の低減法(第2報)-電解停止制御スパークアウト研削法の開発とその効果- 査読

大橋一仁, 若林永三, 藤井直人, 塚本真也, 中島利勝

精密工学会誌 69 ( 11 ) 1590 - 1594 2003年11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：公益社団法人精密工学会

A softened affected layer generated in electrolytic grinding at higher electrolytic voltage could not be removed by a spark-out grinding without electrolysis in the previous report. In this report, the electrolysis controlled spark-out grinding is developed in order to remove completely an affected electrolytic ground layer at any electrolytic voltage. Effects of the electrolysis controlled spark-out grinding on finished surface characteristics are experimentally proved by investigating ultra micro hardness on machined surface, surface finish and so on. Main conclusions obtained in this report are as follows: (1) The electrolysis controlled spark-out grinding can prevent the finished surface hardness from decreasing at higher electrolytic voltage in which affected layer is remained after spark-out grinding without electrolysis. (2) A surface finish and an effective spark-out grinding time decrease by the spark-out grinding with an optimum electrolyze-out time. (3) An optimum electrolyze-out time decreases with increasing electrolytic voltage and becomes negative at electrolytic voltage over 7V.

DOI： 10.2493/jjspe.69.1590

Development of Cavitation Aided Machining for Finishing Fine Surface 査読

K.Ohashi, S.Tsukamoto, T.Nakajima

Proceedings of The Eighteenth Annual ASPE Meeting 2003年10月

電解研削加工における加工変質層の低減法(第1報)-加工変質層の性状と電解停止スパークアウト研削によるその低減過程- 査読

大橋一仁, 若林永三, 上田晋一, 藤井直人, 塚本真也, 中島利勝

精密工学会誌 69 ( 8 ) 1129 - 1134 2003年8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：公益社団法人精密工学会

The purpose of this study is to minimize affected layer generated by electrolytic grinding which results in deterioration of gloss or decrease of hardness on machined surface. In this paper, a reduction process of affected electrolytic ground layer by a spark-out grinding process without electrolysis, in which electrolytic effect stops just in the moment of stopping infeed of grinding wheel, is experimentally investigated by analyzing characteristics of electrolytic ground surface with a glossiness meter or an ultra micro hardness tester. Main conclusions obtained in this paper are as follows: (1) The depth of affected layer decreasing hardness is nearly 2.5 times as large as that deteriorating gloss, and both depths of affected layer increase with increasing electrolytic voltage. (2) In the case of higher electrolytic voltage, the stock removal in spark-out grinding process without electrolysis is less than the depth of affected layer decreasing hardness generated in steady electrolytic grinding process. So after finish of spark-out grinding, an affected layer decreasing hardness is remained on finished surface on which glossiness is recovered up to that of mechanical ground surface.

DOI： 10.2493/jjspe.69.1129

極軟質レジノイド砥石による表面あらさ改善過程の研究(第1報)-研削開始後の表面あらさ最小化現象- 査読

大橋一仁, 多田憲倫, 中沢和彦, 大川憲毅, 塚本真也, 中島利勝

精密工学会誌 69 ( 6 ) 803 - 808 2003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：公益社団法人精密工学会

In this paper, an improving process of surface roughness in cylindrical plunge grinding with a super-soft grade resinoid bond wheel, whose bonding material is prepared by the interaction of polyvinyl alcohol and thermosetting plastics, is discussed, analyzing the ground surface profile, the topography of acting wheel surface and so on. Main conclusions obtained in this paper are as follows: (1) Minimizing phenomenon of surface roughness in which surface roughness decreases down to the minimum after start of grinding is remarkably occurred in plunge grinding process with a super-soft grade resinoid bond wheel. And the phenomenon is useful for improving surface roughness by grinding. (2) Decrease of number of simultaneously acting cutting edge by a rapid increase of wheel wear leads to worsen the surface finish just after the point of minimizing surface roughness. (3) The number of simultaneously acting cutting edge is obtained by ground surface profile, topography of acting wheel surface and interference wheel arc length.

DOI： 10.2493/jjspe.69.803

跳ねる機械を実現させる創成科目の導入とその教育効果査読

塚本真也, 大橋一仁, 鷲尾誠一, 鳥居太始之

工学教育 50 ( 6 ) 51 - 56 2002年11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：公益社団法人日本工学教育協会

本報告では,機械工学科の専門性を加味した「ストローの斜塔」と「跳ねる機械」の創成過程における具体的な教育効果について報告している.初年度の試行の結果,学生の課題探求・創成能力の育成のためにモノ創成をやみくもに実施しても失敗する可能性が高く,導入段階の発想ツールによるアイデア創出とそれを実現するための綿密な創成計画の構築が不可欠であることを認識した.次年度にFDを実施することで,ストローの斜塔ならびに跳ねる機械ともに,その独創性を顕著に向上させることができた.

DOI： 10.4307/jsee.50.6_51

創成科目における発想ツールの学習とその教育効果査読

塚本真也, 大橋一仁, 鷲尾誠一, 鳥居太始之

工学教育 50 ( 5 ) 71 - 77 2002年9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：公益社団法人日本工学教育協会

本報告では,PBLで跳ねる機械を実現させる創成科目―学生の課題探求・創成能力を育成する創成プロジェクト―の具体的な教育成果を紹介する.特に,課題探求・創成能力の重要性を認識させるためには,準備段階で学生の発想力初期値を測定することが不可欠であること,ならびに発想ツールの学習でOpen-Ended課題に対する学生の反発・戸惑いが払拭でき,教育効果が向上することなどを詳細に報告している.

DOI： 10.4307/jsee.50.5_71

Al-Mg合金の超精密切削加工における仕上げ面粗さの創成要因に関する研究査読

中島利勝, 吉川満雄, 大橋一仁, 東本修, 金目茂孝

精密工学会誌 68 ( 9 ) 1221 - 1225 2002年9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：公益社団法人精密工学会

In ultraprecision cutting by which surface finish is nano-meter order, the problems which are not necessary to consider in ordinary cutting occur. One of these is the step at grain boundary on machined surface which is generated by the difference of elastic recovery of crystal grains after cutting edge passing because of mechanical characteristics of crystal grain affected by crystal direction. In this study, in order to make clear the mechanism of the surface finish generation in ultraprecision cutting of Al-Mg alloy, the relationship between clearance angle of tool and surface finish is analyzed quantitatively taking notice of step at grain boundary. As a result, it is confirmed that burnishing effect with clearance of cutting tool, which strengthen with a decrease of clearance angle, improves surface finish in ultraprecision cutting of Al-Mg alloy.

DOI： 10.2493/jjspe.68.1221

Dressing process of resinoid bonded wheel with YAG laser for form grinding 査読

K Ohashi, T Nakajima

PROGRESS OF MACHINING TECHNOLOGY 351 - 356 2002年9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：AVIATION INDUSTRY PRESS

Form dressing of poreless resinoid bonded wheel is carried out by scanning a Q-switched YAG laser beam on the wheel surface and the form dressing mechanism is experimentally investigated by analyzing initial profile of dressed wheel, variation of wheel tip profile in form grinding process, density and height of cutting edge and the like, and by comparing with those by a traditional dressing with PVA wheel. Irradiation of YAG laser beam on Wormed or circular formed resinoid wheel surface leads to the available dressing effect and higher form accuracy in grinding process. Especially the scanning of a YAG laser beam on Wormed resinoid bond wheel surface results in about 10 mum in radius of wheel tip which is better form dressing effect than that by a traditional dressing with PVA wheel.

キャビテーション援用加工の基礎的研究ガラス表面の超精密基礎加工現象査読

大橋一仁, 西山耕二, 村本竜郎, 中島利勝

精密工学会誌 67 ( 12 ) 2000 - 2004 2001年12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：公益社団法人精密工学会

The purpose of this research is to develop a cavitation aided machining which positively makes use of cavitation occurring in fluid for machining phenomenon. In this paper, a fundamental ultraprecision machining phenomenon of glass surface is made clear and its machining characteristics is experimentally investigated by analyzing surface finish, stock removal and cavitation impact. Then an efficiency of applying the cavitation aided machining as an ultraprecision machining is proved by carrying out ultraprecision surface machining on glass surface based on the machining phenomenon. Main conclusions obtained in this paper are as follows; (1) Cavitation aided machining can be applied to an ultraprecision machining by which the surface finish of glass is improved down to the surface finish at about 5.0nmRy by using abrasives of WA 4000. (2) WA abrasive grains generate finer machined surface than GC abrasives which is harder or AZ abrasives which is heavier. (3)Ultraprecision machined glass surface with 60mm in length is generated by applying a fundamental machining phenomenon of cavitation aided machining along flowing direction of machining fluid continuously.

DOI： 10.2493/jjspe.67.2000

極軟質レジノイド砥石による仕上面生成特性に関する研究査読

中島利勝, 大橋一仁, 大川憲毅, 中沢和彦, 多田憲倫

砥粒加工学会誌 45 ( 4 ) 169 - 174 2001年4月

電解研削加工における材料除去特性に関する研究査読

中島利勝, 大橋一仁, 上田晋一, 山下諭, 藤井直人

精密工学会誌 67 ( 1 ) 120 - 125 2001年1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：公益社団法人精密工学会

In this paper, the material removal mechanism in electrolytic grinding process is experimentally investigated by analyzing the stock removal due to electrolytic phenomenon and to grinding phenomenon in electrolytic grinding process, taking the inevitable accumulation phenomenon of interference depth of wheel into consideration. The material removal effect in electrolytic grinding is also discussed from the viewpoint of machining energy. Main conclusions obtained in this paper are as follows: (1) The electric current in electrolytic grinding process increases from beginning of wheel interference because of the momentary short circuit or electric discharge through generated chips at smaller concentration of electrolyte or applied voltage. Therefore all electric current isn't always consumed for the electrolytic effect. (2) There exists the critical electrolytic conditions from which the electrolytic effect in electrolytic grinding process intensifies. (3) The total consumed energy reduces with the increase of concentration of electrolyte or the applied voltage, but the effective energy rate for material removal decreases at about 7V in applied voltage.

DOI： 10.2493/jjspe.67.120

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