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56 巻, 2 号
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淺間 一, 遠藤 勲1990 年 56 巻 2 号 p. 239-242
発行日: 1990/02/05
公開日: 2009/06/30
ジャーナル フリーPDF形式でダウンロード (841K) -
岸本 通雅1990 年 56 巻 2 号 p. 243-246
発行日: 1990/02/05
公開日: 2009/06/30
ジャーナル フリーPDF形式でダウンロード (705K) -
長棟 輝行1990 年 56 巻 2 号 p. 247-250
発行日: 1990/02/05
公開日: 2009/06/30
ジャーナル フリーPDF形式でダウンロード (864K) -
福田 敏男, 長谷川 修1990 年 56 巻 2 号 p. 251-254
発行日: 1990/02/05
公開日: 2010/02/16
ジャーナル フリー本報告において,細胞大量培養のために用いられるマイクロキャリアとしてのビーズ及びビーズ上の細胞を画像処理的に抽出後認識・計測し,細胞の培養状況の判定をエキスパートシステムを用いて自動的に行う方法及びその有効性について述べた.抄録全体を表示PDF形式でダウンロード (3502K) -
蛭田 文治, 鈴木 新平, 平 道夫1990 年 56 巻 2 号 p. 255-258
発行日: 1990/02/05
公開日: 2010/02/16
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高野 久輝, 梅津 光生, 妙中 義之, 中谷 武嗣1990 年 56 巻 2 号 p. 259-263
発行日: 1990/02/05
公開日: 2009/06/30
ジャーナル フリー心臓の主たる機能は一刻も休まず必要量の血液を肺及び全身に送り出すポンプ機能である.この機能が何らかの原因で高度の障害を受けると,全身に十分な血液を送れなくなり致命的である.かかる病態に対し,近年機械的な手段で心臓ポンプ機能の一部ないし大部分を補助代行する補助人工心臓システム(Ventricular Assist System: VAS)が開発されてきた.
国立循環器病センターにおいても,かかる急性重症心不全患者の救命を目的として,独自のVASを開発し,臨床応用してきた.本稿においては,VASの概略を説明すると共に,当施設で開発したVAS用の駆動装置に付与した自動制御機構について解説する.
VASを作動させるCDUに,全身の循環と不全心の回復を安全,適正に,更に省人力的に行うための,自動心拍同期機構と補助量自動制御機構を開発し具備した。
自動心拍同期機構として,心電のT波トリガ方式を主,従来のR波トリガ方式を副とする機構を開発した.T波トリガ方式は心拍数が急激に変動しても,又不整脈であっても,頻回の調整を必要とせず,正確に心拡張期に送血し得た.補助量自動制御機構は,LAPとTFの定値制御を主体としており,前者は肺欝血の防止と不全心の前負荷の調節を容易にし,後者は全身への血流量を保障して全身循環を良好に維持した.補助人工心臓からの離脱操作は,本機構により自動的に行われ,高度心不全を適正に回復せしめ得た.抄録全体を表示PDF形式でダウンロード (5096K) -
千葉 喜英1990 年 56 巻 2 号 p. 264-269
発行日: 1990/02/05
公開日: 2009/06/30
ジャーナル フリーPDF形式でダウンロード (21947K) -
西村 恒彦1990 年 56 巻 2 号 p. 270-274
発行日: 1990/02/05
公開日: 2009/06/30
ジャーナル フリーPDF形式でダウンロード (15326K) -
増澤 徹1990 年 56 巻 2 号 p. 275-279
発行日: 1990/02/05
公開日: 2009/06/30
ジャーナル フリーPDF形式でダウンロード (10481K) -
猪俣 忠雄1990 年 56 巻 2 号 p. 282-286
発行日: 1990/02/05
公開日: 2009/06/30
ジャーナル フリーPDF形式でダウンロード (5252K) -
柘植 宗紀1990 年 56 巻 2 号 p. 287-291
発行日: 1990/02/05
公開日: 2009/06/30
ジャーナル フリーPDF形式でダウンロード (2176K) -
樋口 俊郎, 山口 智実, 前原 育夫, 斉藤 清1990 年 56 巻 2 号 p. 293-298
発行日: 1990/02/05
公開日: 2010/02/16
ジャーナル フリーThis paper presents a high speed non-circular machining NC-lathe for cutting a piston-head of a reciprocating engine. In the non-circular machining, it is indispensable for a cutting tool to reciprocate in phase with the rotation of the main spindle. This cutting tool positioning mechanism needs high frequency response and high power. So an electro-hydraulic servomechanism was applied to the positioning mechanism, and the non-circular machining NC-lathe was developed. The machining of a piston-head needs higher speed cutting, and so the positioning servomechanism needs higher frequency response. But the previously developed positioning mechanism does not have the required frequency response because the mass of the cutting tool and the base is too heavy. So the lightening of the mass and the increase of the hydraulic power source pressure and so on have made the required frequency response possible, and the high speed non-circular machining NC-lathe has been newly developed for machining of a piston-head.抄録全体を表示PDF形式でダウンロード (3604K) -
高津戸 光雄, 古沢 利明, 高田 昇, 貴志 浩三1990 年 56 巻 2 号 p. 299-304
発行日: 1990/02/05
公開日: 2009/06/30
ジャーナル フリーThis paper describes a ball end mill cutting in gradient optimizing feed. The method consists of cutting of optimized feed on each gradient in three dimensional curved surface (thereafter referred to as gradient optimizing feed). An attempt was made to cutting in rising gradient cutting, falling gradient cutting in an inclined plane with ball end mill. It was observed that there was optimized feed in each gradient degree. So, an attempt was made to cutting in gradient optimizing feed and continuous feed. As a result, it was found that the gradient optimizing feed was successful not only in improving tool life, but also in achieving better finished surface roughness.抄録全体を表示PDF形式でダウンロード (3818K) -
くさび形平板に不連続分布荷重が作用する場合の特性五十君 清司, 小林 史敏1990 年 56 巻 2 号 p. 305-310
発行日: 1990/02/05
公開日: 2009/06/30
ジャーナル フリーIn this paper the properties of caustic patterns necessary to apply the caustic experimental method to stress analysis in cutting operations were made clear. Under simplified two dimensional conditions, the object of study is a wedge shape plane with discontinuously distributing oblique load divided into 2 or 3 parts over loading region. Specimens are made of acrylate resin plate of about 3 mm thickness. The caustic patterns formed by reflected lights from the both surfaces of plate are observed and those characteristics with loading conditions are investigated in detail. On the other hand the computational patterns based on optical theory and mapping method are plotted. These two patterns are coincided accurately enough. With gained results the convenient simple formula to evaluate one end vale of external load is proposed.抄録全体を表示PDF形式でダウンロード (8126K) -
基板表面平滑特性三橋 眞成1990 年 56 巻 2 号 p. 311-316
発行日: 1990/02/05
公開日: 2009/06/30
ジャーナル フリーThis paper deals with smoothing characteristics of substrate surface roughness by polishing. An attempt was made to analyze the smoothing quantity of surface roughness, when changing polishing conditions. In the analysis, a formula on the pressure distribution between substrate surface roughness and polisher was derived from Hertz's formula. An equation about the smoothing quantity of surface roughness derived involving the smoothing primary texture and waviness of surface roughness. Calculated smoothing quantities of surface roughness were in agreement with experimental results. The smoothing characteristics of surface roughness which has been conceptually considered can be explained well by the derived equation. The polishing conditions of disk substrate are discussed. In order to smooth surface roughness with a little stock removal quantity at short polishing time, the disk substrate should be polished with low pressure and with high relative velocity.抄録全体を表示PDF形式でダウンロード (1069K) -
手塚 信一, 吉川 昌範1990 年 56 巻 2 号 p. 317-322
発行日: 1990/02/05
公開日: 2009/06/30
ジャーナル フリージルコニアにYAGレーザを照射することにより起こる表面変質現象を観察した結果,以下のことがわかった。
(1) 気体雰囲気中でレーザ照射されたジルコニアでは,溶融凝固部で立方晶,単斜晶が転移して正方晶に変化する.水溶液中でレーザ照射した場合には相変態は起こらない.
(2) 気体雰囲気中でレーザ照射された面は黒色に変化する.この黒色化現象は相変態によるものではなく酸素欠乏によるものである.水溶液中で照射された面では黒化現象は認められなかった.
(3) 気体雰囲気中でレーザ照射された照射面には溶融凝固物が残り,表面や表面下にき裂が発生する.水溶液中のレーザ照射面には,溶融物がエッチングによって除去され,溶融凝固物やき裂が存在しない.抄録全体を表示PDF形式でダウンロード (11283K) -
酸化けい素蒸着膜工具の研磨特性西口 隆, 桝田 正美1990 年 56 巻 2 号 p. 323-328
発行日: 1990/02/05
公開日: 2009/06/30
ジャーナル フリーFor the purpose of developing precision polishing method of a diamond stylus for video disc player (CED type), polishing technology using siliconoxide deposited polishing disk is discussed experimentally in this paper. Stock removal rate of the diamond stylus, using the silicon-oxide deposited polishing disk, is in proportion to the polishing distance and load. This fact is as same as the conventional polishing technology. However, the stock removal rate is found to be influenced by the relative humidity of the polishing environment. When polishing in 20 RH%, the stock removal rate is four and a half times larger than that in 60 RH%. In order to obtain a siliconoxide polishing disk which can achieve larger stock removal rate, deposition experiment and the siliconoxide analysis is carried out. Thereby, a siliconoxide which is deposited with SiO in O2 plasma gives the largest stock removal rate. This is due to the fact that the siliconoxide best for the polishing has the most Si-O bonds and less H2O, Si-OH.抄録全体を表示PDF形式でダウンロード (4969K) -
発振過程の解析と振動抑制機構の検討臼井 英治, 呉 進, 帯川 利之1990 年 56 巻 2 号 p. 329-335
発行日: 1990/02/05
公開日: 2009/06/30
ジャーナル フリーCutting models which consist of lines of velocity discontinuity are proposed for analyzing the dynamic, orthogonal cutting with tools of restricted tool-chip contact length under variable undeformed chip thickness. An energy method is also developed which enables us to predict dynamic cutting force and chip formation by using the cutting models proposed and the data of steady cutting with constant undeformed chip thickness. Through the analysis of the dynamic cutting "wave combined" and the simulation analysis of chatter growth in one degree of freedom, the predicted results with the energy method are proved to be in good agreement with those obtained experimentally. It is also revealed through these analyses that the restriction of the contact length yields an appreciable reduction of the variation of cutting force, especially the frictional force, due to chatter vibration. The chatter suppression effect of the tool could be attributed to this reduction. It is further shown analytically and also experimentally that the chatter generation may be protected with the tool of sufficiently small contact length, or at least the chatter growth may be depressed to a certain amplitude.抄録全体を表示PDF形式でダウンロード (1068K) -
切れ刃離脱過程の有限要素法シミュレーション帯川 利之, 松村 隆, 臼井 英治1990 年 56 巻 2 号 p. 336-342
発行日: 1990/02/05
公開日: 2009/06/30
ジャーナル フリーA finite element modeling, which accompanies a modified effective strain criterion for crack initiation and growth, is developed for simulating the transient chip formation at the exit of interrupted cutting. Through the FEM simulation, occurrence of the negative shear and formation of the broken chip with "foot" are realized, the large variations of tool-chip contact length and stress distribution on the tool face being obtained. It is also revealed against A. J. Pekelharing's inference that the reversing of frictional stress on the tool face due to the chip rotation does not take place in any instance of the exit, since the chip always maintains its upward moving, even after the crack initiation. As the cutting edge sticks into the root of chip during the crack growth, the generated compressive stress appears to reduce the fracture probability of cutting edge.抄録全体を表示PDF形式でダウンロード (5422K) -
大竹 尚登, 中村 正弘, 吉川 昌範1990 年 56 巻 2 号 p. 343-348
発行日: 1990/02/05
公開日: 2010/02/16
ジャーナル フリーマイクロ波プラズマCVD法により,モリブデン基板上にメタン濃度3%でダイヤモンドと無定形炭素の混在した物質を生成させ,その生成過程,および混在物質の構造を調べた。その結果,合成初期には四角すい状のダイヤモンドと無定形炭素の混在した物質が生成し,合成時間が長くなると,(100)面配向したダイヤモンドに成長することを明らかにした.
このダイヤモンドと無定形炭素の混在した粒をモリブデン基板表面に析出させ,ラップ工具を作製した.この工具を用いて焼結アルミナのラッピングを行い,30sのラップ時間で0.6μm Rmaxの仕上面粗さに仕上げることができた.なお仕上速度は,1μ m/sである.これより,セラミックス材料のラップ工具として,気相合成法によって作製したダイヤモンドが使用可能であることを示唆できた.抄録全体を表示PDF形式でダウンロード (12527K) -
松原 十三生, 山本 久隆, 水本 洋, 園山 恭啓1990 年 56 巻 2 号 p. 349-354
発行日: 1990/02/05
公開日: 2009/06/30
ジャーナル フリーIn this paper, a new method is proposed to minimize the grinding cycle time of cylindrical plunge grinding operations. The proposed method is based on the changing of the velocity ratio (the peripheral speed of workpiece/the peripheral speed of grinding wheel) in a grinding cycle although the conventional plunge grinding has been done with a constant velocity ratio in one cycle. The proposed plunge grinding cycle consists of three stages ; that is, (1) the rough grinding with high velocity ratio, (2) the fine grinding with low velocity ratio and (3) the spark-out grinding with low velocity ratio. At the first stage (the rough grinding), the reduction in grinding time is planed by high stock removal rate based on high velocity ratio. On the other hand, the main role at the second stage (the fine grinding) and the third stage (the spark-out grinding) is improving the surface quality of the workpiece, especially the decrease of the surface roughness and the damaged surface layer by relatively low velocity ratio. The validity of this method has been examined by computer simulations and some experiments. As a result of this, it has been cleared that the cylindrical plunge grinding with a high efficiency can be realized without the deterioration of the workpiece surface quality by using the proposed grinding method.抄録全体を表示PDF形式でダウンロード (1002K) -
小川 誠, 中山 一雄1990 年 56 巻 2 号 p. 355-360
発行日: 1990/02/05
公開日: 2009/06/30
ジャーナル フリーNicks engraved on the cutting edges of twist drill divide chips into narrower ones and, as the result, bring about the reduced drilling forces and prolonged drill life. This report points out further contribution of nicks in improving the hole accuracy: Properly designed nicks suppress the tottering of drill at the intial stage of drilling, and improve the roundness and cylindricity of the hole produced. For the design of appropriate nicks, the effects of the geometry and position of nicks on drill performance are shown experimentally.抄録全体を表示PDF形式でダウンロード (1135K) -
大久保 信行, 今村 一哉1990 年 56 巻 2 号 p. 361-366
発行日: 1990/02/05
公開日: 2009/06/30
ジャーナル フリーThe experimental modal analysis is widely used to analyze the dynamic behaviours of a machine, which is based on the measurement of frequency response functions when the structure under stationary is excited by a hammer or an exciter. In many cases, the dynamic behaviours under stationary is more or less different from those under operation, which are more important consideration in dynamic design. Under operation only the response data are available so that the frequency response functions can not be measured. In this situation the response ratio method has been commonly used by simply calculating auto-cross spectra among the response data which yields inaccurate results due to contaminated noise or closely coupled modes. In this paper the principal component analysis that is the eigenvalue decomposition of auto-cross spectra matrix is utilized to overcome these problems. In addition the AR method is introduced in order to calculate the spectra even in transient state under operation instead of FFT. The dynamic behaviours when a motor bike gets over a bump is dealt with to show how the new method proposed can provide detail and accurate analysis on dynamic behaviours.抄録全体を表示PDF形式でダウンロード (968K) -
安藤 公一, 吉川 弘之1990 年 56 巻 2 号 p. 367-372
発行日: 1990/02/05
公開日: 2009/06/30
ジャーナル フリーThis paper deals with a method for automatic generation of intermediate manufacturing information required for linking the result of design with the tasks in process planning. The method is characterized as that such manufacturing information is derived from the designer's intention expressed in the form of functional descriptions and their related geometries, both of which can be preserved in the product design stages in the CAD system. In order to describe the designer's intention in a unified way, we develop a descriptive frame work to represent the functions of the design object by three types of basic functions about a face element; function of (1) transmission, (2) constraint, (3) fixation, and by two items of functional properties such as the mechanism utilized for realization of the basic function and the condition and direction of the motion. By using this representation, the intermediate manufacturing information can easily be obtained. To confirm the validity of the method proposed in this paper, a prototype system of intermediate manufacturing planning has been fabricated. An appropriate result is obtained. This work is carried out under full consideration to realize the integration of CAD and CAM.抄録全体を表示PDF形式でダウンロード (1130K) -
高谷 裕浩, 三好 隆志, 斎藤 勝隊1990 年 56 巻 2 号 p. 373-380
発行日: 1990/02/05
公開日: 2009/06/30
ジャーナル フリーA new method based on the Fraunhofer diffraction theory which can estimate RMS roughness of super smooth random surface such as the polished or lapped surface is presented in this paper. The relations between the random surface roughness and the Fraunhofer diffraction pattern are analized theoretically and an equation which can estimate quantitatively the RMS roughness is derived. In order to verify the validity of this proposed method, computer simula-tions as well as experiments for the silicon wafer with a surface roughness of 1-10 nm Rrms are carried out. In addition, STM is used for checking the surface roughnesses of the workpieces. Consequently, it is found that this method makes it possible to measure the surface roughness within a 10% error from 1 nm to maximum 120 nm Rrms. Moreover, from experiments using an improved measuring system which can evaluate the texture all over the surface of a silicon wafer, this method is found to be useful for measuring quickly and easily the ultra fine surface roughness of the complete surface even if workpiece is set with a tilt and vibrates when the table is moving.抄録全体を表示PDF形式でダウンロード (1413K) -
原理と基礎的実験小澤 則光, 北村 豊, 河野 嗣男, 三井 公之, 岡崎 祐一1990 年 56 巻 2 号 p. 381-387
発行日: 1990/02/05
公開日: 2009/06/30
ジャーナル フリーA new measuring method is proposed for evaluating error motion of spindle rotation, where three laser beams entered through interferometers to a cube-corner prism (CCP) mounted on the spindle-end. The method was verified on an optical bench, and was applied to in-process measuring experiments for the spindle of the surface grinding machine. The noise level of the measuring system was found to be approximately 0.07 μm. And dynamic behavior of rotating spindle was measured accurately during surface grinding operations.抄録全体を表示PDF形式でダウンロード (2869K) -
超磁歪材料RFey(R=Tb,Dy)のアクチュエータとしての性能江田 弘, 佐橋 政司, 小林 忠彦1990 年 56 巻 2 号 p. 388-392
発行日: 1990/02/05
公開日: 2009/06/30
ジャーナル フリーIntermetallic compounds with the cubic laves phase structure of the type RFey (R=Tb, Dy) are well known to possess a large magnetostriction above 0.1%, and it has been pointed out that this type of compound may make it possible to provide increased precision and control over micropositioning device for high forces to position heavy objects, the accurate and fine focus laser mirrors, telescopes, and electronic microscope. In this study, the design and displacement characteristics for prototype giant magnetostriction actuator with ultra precision are presented. As the preliminary test results, it is certified that use of giant magnetostriction in actuators makes it possible to realize the high power stepping drive with ultra fine resolution of nano meter class, which is very hopeful micro movement tool post.抄録全体を表示PDF形式でダウンロード (3599K) -
ひずみ特性の解析とその改善松田 孝, 佐藤 元宥, 佐藤 浩一郎, 北川 徹1990 年 56 巻 2 号 p. 393-398
発行日: 1990/02/05
公開日: 2009/06/30
ジャーナル フリーThe strain characteristics in a solid double beam type load cell for scales with a stabilized pan, are analyzed and discussed by finite element analysis and experiments. And it is clarified that the nonlinearity and the error due to loading position is mainly due to the buckling of the beam. On those analysis, it is proposed how to reduce them, and it is ascertained by finite element analysis and experiments that the reduction method is effective.抄録全体を表示PDF形式でダウンロード (972K) -
橋本 昭, 木目 健治朗, 江草 尚之, 阪部 茂一1990 年 56 巻 2 号 p. 399-404
発行日: 1990/02/05
公開日: 2009/06/30
ジャーナル フリーThis paper presents a lens actuator of optical head in an optical disc drive. A newly developed moving magnet method is applied to a two dimensional sliding and rotary lens actuator, and radically simplified. This method is to compose a magnetic suspension in focusing and tracking direction by means of yokes and a ring-shaped magnet magnetized in four pole at unequal intervarls, and the designing method of magnetic suspension is disclosed by a detailed magnetic field analysis. It has been further confirmed by analysis and experiment that the force in an undesired direction caused by movement of the magnet can be reduced by symmetrical magnetization. As a result, in driving force, control band and other characteristics, the same performance as in the moving coil type have been recognized.抄録全体を表示PDF形式でダウンロード (817K) -
1990 年 56 巻 2 号 p. 409
発行日: 1990年
公開日: 2009/06/30
ジャーナル フリーPDF形式でダウンロード (155K)
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