研究者詳細 - 大橋　一仁

論文 - 大橋　一仁

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移動熱源によるレジノイド砥石のドレッシングに関する研究 (第4報) YAGレーザの総形ドレッシングへの適用査読

中島利勝, 大橋一仁, 川崎真一, 浜野泰幸

精密工学会誌 65 ( 11 ) 1633 - 1638 1999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

Form dressing of V-formed resinoid bond wheel by scanning a Q-switched YAG laser beam on the wheel surface is carried out 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 so on, comparing with those by a traditional dressing with PVA wheel. Main conclusions obtained in this paper are as follows; (1) Scanning YAG laser beam on V-formed resinoid bond wheel surface results in the better form dressing effect concerning form accuracy or projecting height of cutting edge than a traditional dressing with PVA wheel. (2) Radius of wheel tip decreases with increasing peripheral wheel speed in form dressing because a heat effect on wheel surface by laser beam decreases with an increase of peripheral wheel speed. (3) Laser dressing of V-formed wheel at higher peripheral wheel speed represses a reduction of form accuracy in form grinding process. (4) Radius of dressed wheel tip increases with increasing formed angle and is much affected at larger formed angle by peripheral wheel speed in laser dressing.

DOI： 10.2493/jjspe.65.1633

Grinding process for controlling coefficient of friction of AFRR V-ribbed belt 査読

T Nakajima, K Ohashi

PROGRESS OF CUTTING AND GRINDING 245 - 250 1998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：WORLD PUBLISHING CORPORATION

Aramid fiber reinforced rubber (AFRR) is one of advanced composite materials, which have some excellent characteristics for a transmission belt. V-ribbed belt, which is used as an automobile engine part, is formed by grinding to generate not only the required shape but also the suitable frictional characteristics. The frictional characteristics of V-ribbed belt of AFRR are significantly affected by form grinding conditions because of much lower coefficient of friction of aramid fiber and higher one of matrix rubber. In this paper, an in-process measuring system of coefficient of friction of V-ribbed belt in form grinding process is developed based on quantitative analysis of coefficient of friction. Furthermore, a form grinding technique of V-ribbed belt for controlling coefficient of friction is proposed by investigating coefficient of friction in spark-out grinding process of V-ribbed belt.

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キャビテーション援用ホーニング加工法(CAH)の開発研究査読

中島利勝, 大橋一仁, 吉原永朗, 西山耕二

精密工学会誌 64 ( 6 ) 913 - 917 1998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

The purpose of this research is to develop a new technique of CAH (cavitation aided honing) 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, and 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 CAH to precision machining is investigated by analyzing surface finish, stock removal and behavior of carrier. Main conclusions obtained in this paper are as follows ; (1) Action of abrasive grains onto the surface in CAH is induced by very fine vibratory impact caused by cavitation occurred in the lower part from the center of restrictor in a flow. (2) At 2.0mm in clearance, cavitation impact of carrier becomes strongest, so that the stock removal and the decrease of surface roughness have maximum. (3) CAH can be applied to an ultraprecision machining by which the surface finish of Al-Mg alloy is improved from 7.3nm R_a with ultraprecision cutting down to the surface finish at 6.6nm R_a.

DOI： 10.2493/jjspe.64.913

アラミド繊維強化ゴムの研削加工に関する研究 (第5報) Vリブドベルトの摩擦係数調整成形研削加工査読

中島利勝, 大橋一仁, 黒川純, 大川憲毅

精密工学会誌 63 ( 10 ) 1469 - 1473 1997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

Frictional characteristics of V-ribbed belt of aramid fiber reinforced rubber are significantly affected by form grinding conditions because of much lower coefficient of friction of aramid fiber and higher one of matrix rubber. In this paper, an in-process measuring system of coefficient of friction of V-ribbed belt in form grinding process is developed based on quantitative analysis of coefficient of friction in the previous report. Furthermore, a form grinding technique of V-ribbed belt for controlled coefficient of friction is proposed by investigating coefficient of friction in spark-out grinding process of V-ribbed belt. Main conclusions obtained in this paper are as follows; (1) The in-process measuring system of coefficient of friction of V-ribbed belt which can exactly predict its wide variation in form grinding process is developed. (2) In spark-out grinding process of V-ribbed belt, generation of V-groove is finished in a while from starting of spark-out grinding, and projecting length of aramid fiber continues to decrease gradually until the end of spark-out grinding process. (3) V-ribbed belt which has the required coefficient of friction can be finished by stopping grinding of V-ribbed belt when the measuring system points at the required coefficient of friction in spark-out grinding process after finishing to generate V-groove.

DOI： 10.2493/jjspe.63.1469

アラミド繊維強化ゴムの研削加工に関する研究 (第4報) Vリブドベルトの成形研削機構と摩擦特性査読

中島利勝, 大橋一仁, 黒川純

精密工学会誌 63 ( 9 ) 1295 - 1299 1997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

Aramid fiber reinforced rubber (AFRR) is one of advanced composite materials, which have some excellent characteristics transmission belt. V-ribbed belt is formed by grinding to generate not only the required shape but the suitable frictional characteristics on contacting rubber surface with a pulley. The frictional characteristics of AFRR V-ribbed belt is sensitively affected by projecting condition of aramid fiber whose coefficient of friction is much lower than that of matrix rubber. In this paper, form grinding mechanism of AFRR V-ribbed belt with diamond wheel is experimentally investigated by analyzing form accuracy of V-groove and projecting length of aramid fiber. Furthermore, an estimating method for the coefficient of friction of AFRR V-ribbed belt is proposed by clearing up effects of each factor on the coefficient of friction of V-ribbed belt. Main conclusions obtained in this paper are as follows: (1) Coefficient of friction of AFRR V-ribbed belt is decided by V-groove angle and projecting fiber length on the surface generated in form grinding, and it decreases with increases of V-groove angle or projecting fiber length. (2) Coefficient of friction of V-ribbed belt can be estimated by subtracting the decrease from coefficient of friction caused by projecting aramid fiber from the coefficient of friction decided by V-groove angle of matrix rubber belt without projecting fiber. (3) Both V-groove angle and projecting fiber length increase with an increase of curvature of V-ribbed belt in form grinding process.

DOI： 10.2493/jjspe.63.1295

移動熱源によるレジノイド砥石のドレッシングに関する研究 (第3報) QスイッチYAGレーザによるドレッシング性能の向上査読

中島利勝, 大橋一仁, 八木大輔

精密工学会誌 63 ( 8 ) 1153 - 1157 1997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 establish a new dressing technique of resinoid bond wheel by scanning the point of heat source on wheel surface. Dressing effect with CW YAG laser is testified in previous report. In this paper, Q-switched YAG laser is selected as a dressing tool for making more improvement of dressing effect with YAG laser, and dressing mechanism and grinding characteristics of dressed resinoid bond wheel with Q-switched YAG laser are experimentally discussed by observing the acting wheel surface and analyzing some grinding results with dressed wheel. Furthermore, dressing effect with Q-switched laser is verified by comparing with that with CW laser. Main conclusions obtained in this paper are as follows : (1) Scanning Q-switched YAG laser beam on resinoid bond wheel surface results in better dressing effect than that with CW laser beam. (2) Dressing with Q-switched laser of 2kHz in Q-switch frequency brings out best grinding characteristics of resinoid bond wheel in those of all Q-switch frequency. (3) In lower Q-switch frequency, heat affected structure generated on dressed wheel surface is completely removed as soon as laser beam is irradiated because of radical and frequent variation of heat energy supplied with laser beam.

DOI： 10.2493/jjspe.63.1153

工学部学生に対する「技術文章学」教育の試み : 岡山大学での失敗・成功事例と教育成果査読

中島利勝, 塚本真也, 大橋一仁

工学教育 45 ( 3 ) 46 - 51 1997年5月

Dressing Process of Resinoid Bonded Wheel with YAG Laser 査読

T.Nakajima, K.Ohashi

Proceedings of the Third International Conference on Progress of Cutting and Grinding 570 - 575 1996年11月

常圧焼結窒化けい素の単粒研削によるクラック層に関する研究査読

中島利勝, 大橋一仁, 岡本直之, 岡本裕貴

精密工学会誌 62 ( 9 ) 1330 - 1334 1996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

The purpose of this paper is to get fundamental informations for estimating depth of crack layer under ground surface of sintered silicon nitride which is one of typical engineering ceramics. This paper proposes a estimation method of the depth of crack layer generated in a transitional cutting process, which is a fundamental phenomenon in grinding process, with a single point diamond, as a function of normal cutting force, generated groove depth, Poisson's ratio, fracture toughness and a characteristic parameter of affected structure zone based on linear fracture mechanics. And the rule of the characteristic parameter, which is decided by interference type of cutting edge, is experimentally found out. The characteristic parameter decreases with increasing groove depth in conformity with the exponential function determined by indentation characteristic and nose radius of cutting edge in spherical interference region, and it turns to constant at critical interference depth according to vertical angle of cutting edge. By applying the method in each cutting phenomenon of a cutting edge in grinding of silicon nitride, the depth of remained crack layer in a grinding process can be estimated and grinding conditions or stock removal in successive grinding process can reasonably be determined.

DOI： 10.2493/jjspe.62.1330

移動熱源によるレジノイド砥石のドレッシングに関する研究 (第2報) YAGレーザによるドレッシング効果査読

中島利勝, 大橋一仁, SUN L X, 実盛健郎, 八木大輔

精密工学会誌 61 ( 4 ) 556 - 560 1995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：公益社団法人精密工学会

There is a possibility that resinoid bond wheel may thermally be dressed by scanning the heat source on the wheel surface, because bonding material is lower heat resistance than other ones. In this paper, the dressing effect on resinoid bond wheel with YAG laser beam is discussed, observing the acting wheel surface and investigating the grinding characteristics of the wheel dressed by scanning YAG laser beam. Main conclusions obtained in this paper are as follows: (1) Irradiation of YAG laser on resinoid bond wheel surface results in the dressing effect. (2) The effective dressing conditions concerning the peripheral wheel speed and the feed rate of laser beam are determined by the heat energy provided on wheel surface, the transitional characteristic of heating and the width of affected region by scanning of laser beam during one revolution of wheel. (3) Resinoid bonding material become brittle and weak and/or abrasive grains are damaged by irradiation of YAG laser on the wheel surface. (4) Under the same heat energy provided on wheel surface, surface finish increases with a decrease of the peripheral wheel speed in dressing and an increase of the feed rate of laser beam.

DOI： 10.2493/jjspe.61.556

アラミド繊維強化ゴムの研削加工に関する研究(第3報) 仕上面の摩擦特性の解析査読

中島利勝, 大橋一仁, 山本哲

精密工学会誌 60 ( 11 ) 1637 - 1641 1994年11月