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51 巻, 3 号
選択された号の論文の34件中1～34を表示しています
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森永 正廣1985 年 51 巻 3 号 p. 463-465
発行日: 1985/03/05
公開日: 2009/06/30
ジャーナル フリー国際科学技術博覧会(科学万博一つくば'85)は「人間・居住・環境と科学技術」をテーマとして,来る3月17日から9月16日までの半年間,茨城県筑波研究学園都市において開催される.
厳しい財政事情のなか科学万博を開催することとなったのは,科学技術の人類社会に与える影響が極めて大きなものとなった今日,これまでに増して,人間と科学技術の調和を図り,人類の福祉に貢献する科学技術を創り出していくことがきわたて重要であるとの理解と,科学技術の国際的な交流のより一層の振興,科学技術に対する国民各層,特に21世紀を担う青少年の理解を深たる必要性などについて切実な認識を得,広く関係方面の支援があったからこそである.ここでは科学万博の概要について紹介する.抄録全体を表示PDF形式でダウンロード (407K) -
根本 光宏1985 年 51 巻 3 号 p. 466-469
発行日: 1985/03/05
公開日: 2009/06/30
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河本 哲三1985 年 51 巻 3 号 p. 470-475
発行日: 1985/03/05
公開日: 2009/06/30
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榎本 祐嗣, 山中 一司1985 年 51 巻 3 号 p. 476-480
発行日: 1985/03/05
公開日: 2010/02/16
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影山 和郎1985 年 51 巻 3 号 p. 481-484
発行日: 1985/03/05
公開日: 2009/06/30
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鶴島 稔夫1985 年 51 巻 3 号 p. 485-488
発行日: 1985/03/05
公開日: 2009/06/30
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井上 廉, 太刀川 恭治1985 年 51 巻 3 号 p. 489-492
発行日: 1985/03/05
公開日: 2009/06/30
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福富 勝夫, 岡田 雅年1985 年 51 巻 3 号 p. 493-497
発行日: 1985/03/05
公開日: 2009/06/30
ジャーナル フリーPDF形式でダウンロード (5352K) -
樋下 敏雄1985 年 51 巻 3 号 p. 498-502
発行日: 1985/03/05
公開日: 2009/06/30
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佐藤 純一1985 年 51 巻 3 号 p. 503-507
発行日: 1985/03/05
公開日: 2009/06/30
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清水 豊1985 年 51 巻 3 号 p. 508-511
発行日: 1985/03/05
公開日: 2009/06/30
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岡部 秀彦, 今岡 春樹, 赤見 仁1985 年 51 巻 3 号 p. 512-515
発行日: 1985/03/05
公開日: 2009/06/30
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澤田 紀一1985 年 51 巻 3 号 p. 516-519
発行日: 1985/03/05
公開日: 2009/06/30
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前田 肇, 堀 原一, 宮 淳1985 年 51 巻 3 号 p. 520-524
発行日: 1985/03/05
公開日: 2010/02/16
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久場 康良, 和田 充雄1985 年 51 巻 3 号 p. 525-529
発行日: 1985/03/05
公開日: 2009/06/30
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金綱 久明1985 年 51 巻 3 号 p. 530-534
発行日: 1985/03/05
公開日: 2010/02/16
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室田 達郎1985 年 51 巻 3 号 p. 535-539
発行日: 1985/03/05
公開日: 2009/06/30
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1985 年 51 巻 3 号 p. 540-546
発行日: 1985/03/05
公開日: 2009/06/30
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高次の変調波によるFM・AM西田 知照, 丸木 勇治1985 年 51 巻 3 号 p. 547-552
発行日: 1985/03/05
公開日: 2009/06/30
ジャーナル フリーIn gears with eccentric errors, the tooth-meshing frequency is subjected to both amplitude modulation and frequency modulation at the same time. Consequently, the noise spectrums consist of a large number of sidebands. The general equation about sideband levels is derived in the case the modulation signals include the high order harmonics of the angular frequency of the eccentric gear. The value of the parameter in the general equation is estimated from the change of the amplitude of the tooth-meshing noise and the fluctuation of the angular velocity of the input and the output shaft. The appropriateness of the general equation is shown by comparing the spectrum of the actual tooth-meshing noise with the calculated one by the general equation.抄録全体を表示PDF形式でダウンロード (884K) -
村奈嘉 与一, 安藤 俊幸, 古川 英一1985 年 51 巻 3 号 p. 553-557
発行日: 1985/03/05
公開日: 2009/06/30
ジャーナル フリーThis paper describes a rectilinear vibration table specifically developed for performing accurate crosstalk calibration of torsional vibration pickups. It is suspended by parallel fiatsprings, and it incorporates a yaw correction device in onder to minimize the parasitic rotation. The correction device is composed of two identical electrodynamic driving units, which are disposed off-centre so as to generate an adjustable torque in addition to the main thrust. Dynamic behaviour of the moving table is analysed, taking into account manufacturing inaccuracies of the suspension. The theoretical analysis indicates that the parasitic rotation can be minimized over a wide frequency range by proper adjustment of the correction device. The validity of the theoretical analysis and effectiveness of the correction device are verified by experiments. Experimental results are presented showing that after the adjustment the parasitic rotation is reduced to less than ±0.05 arcsec over the frequency range 5 Hz to 48 Hz for a constant-acceleration harmonic excitation of ± 0.1 g. It is pointed out that the correction device is also applicable to statically-driven moving tables. Detailed description of the design and construction of the vibration table is given.抄録全体を表示PDF形式でダウンロード (822K) -
新井 泰彦, 倉田 忠雄1985 年 51 巻 3 号 p. 558-562
発行日: 1985/03/05
公開日: 2009/06/30
ジャーナル フリーモアレじまの自動化において最も基本的問題でありながら従来あまり取り扱われなかったモアレじまの代表値について検討を行い,以下の結果を得た.
(1)検討結果より,論理的2値化によるモアレ画像のエッジが代表値として使用できることを示した.
(2)本研究で提案した代表値が複雑な形状を有する物体に対しても簡単な論理により凹凸判定が行えることを示した.
(3)以上の結果より,本研究で提案した代表値がモアレ法の自動化にきわめて有効なものであることを示した.抄録全体を表示PDF形式でダウンロード (5457K) -
高増 潔, 大園 成夫1985 年 51 巻 3 号 p. 563-568
発行日: 1985/03/05
公開日: 2009/06/30
ジャーナル フリー以上述べたように,平面度のある程度悪い表面や,各面の直角度がある程度悪い時でも,最小二乗平面を使うデータム決定の手法では一意的でばらつきの少ないデータムシステムを作ることができる.さらに,各面は最小二乗平面という形で対等に処理でき,計算機での扱いに適した方法となっている.図6(c)は,各平面の最小二乗平面によって第1次,第2次,第3次データムの位置を決定している様子である.抄録全体を表示PDF形式でダウンロード (1054K) -
微小トルク領域感度の改善服部 光郎, 野口 豊生, 後藤 忠彦, 原田 耕介1985 年 51 巻 3 号 p. 569-575
発行日: 1985/03/05
公開日: 2009/06/30
ジャーナル フリーA new type of induction motor with a built-in torque sensor has been developed for grinding torque monitoring. Sensitivity in the low torque range has been improved in order to detect small torque changes. The torque sensor utilizes a non-linear torsion spring to obtain both high-sensitivity and enough stiffness for grinding torque measurement. The main focus of the development is the possibility of using the torque sensor as a gap-eliminator. Experimental results obtained are as follows : (1) A narrow gap between a grinding wheel and workpiece in a static condition can be estimated from the grinding torque. However, the torque difference between a gap of 0μm and a gap of 40μm is only 0.08 N·m. This is only 0.3% of full scale of measuring range of the developed torque sensor. (2) The torque sensor has good linearity in torque measurement, and can be used for monitoring torque with proper consideration for drift and ripple. (3) The torque sensing motor performs as well as a conventional motor in grinding operations even though it has complicated rotor shaft system.抄録全体を表示PDF形式でダウンロード (1037K) -
高分子コンクリートの配合設計森脇 俊道, 上野 滋, 高野 真一, 岩田 一明1985 年 51 巻 3 号 p. 576-581
発行日: 1985/03/05
公開日: 2009/06/30
ジャーナル フリーIn order to apply polymer concrete as a new structural material to machine tool structures, basic studies are carried out to obtain optimum design strategy of concrete. The relations are experimentally obtained between the weight percentage of the fine aggregate within the aggregates and the volume percentage of the total aggregates filled in limited volumes. Cylindrical specimens made of epoxy resin concretes with various compositions are tested to compare static and dynamic rigidities and tensile strength. Major results obtained are as follows : (1) There exists an optimum weight percentage of the fine aggregate taking into account of the sizes of the aggregates and the volume to be filled. (2) When the content of the resin in the concrete is increased, the damping of the concrete specimen is increased, while the rigidity is decreased. The effect of the resin content is much critical to the change of the rigidity than to that of the damping. (3) The tensile fractui.e of the concrete is mainly attributable to the fracture of the coarse aggregate. Thus the tensile strength of the concrete specimen is higher for that with larger weight percentage of the fine aggregate.抄録全体を表示PDF形式でダウンロード (3957K) -
凸面創成の場合田中 芳雄, 井戸 守, 松尾 裕文1985 年 51 巻 3 号 p. 582-589
発行日: 1985/03/05
公開日: 2009/06/30
ジャーナル フリーGeneration of spherical surfaces of optical glass is investigated in fine abrading by using a lens polishing machine. Simulation and experiment concern the abrading process to get convex surface shapes of works with relatively low ratios of radius to aperture. Changes in surface shapes of works and tools are followed by treating their surfaces as surfaces of the fourth order of revolution and spherical surfaces at the same time. The main results are as follows. (1) Abrading by using the tool with an exactly spherical surface leads the work to have some deviation from the sphere with surface undulation of low frequencies. (2) It is preferable to use the tool as the upper workpiece in order to get low surface undulation. (3) Stationary surface shape of the work after enough abrasion is almost the same even if its initial shape is considerably different (but the initial shape of the tool and the abrading conditions are the same). The abrading time to get the stationary surface shape varies depending on the initial shapes of the works. This time is easily predicted by the differential equation which is provided to prescribe the abrading process.抄録全体を表示PDF形式でダウンロード (1302K) -
リーマ加工のバリとバリ取り因子山本 章裕, 藤尾 哲一, 三宅 輝明1985 年 51 巻 3 号 p. 590-595
発行日: 1985/03/05
公開日: 2009/06/30
ジャーナル フリーIt is possible in reaming to produce the standard burrs for deburring tests, which have the desired controlled sizes. With the exit burrs of same height and different thickness, the deburring tests of vibratory finishing are carried out. The workpiece is a cylinder (φ30×φ10×10 mm) of High Carbon Chromium Bearing Steel ( SUJ 2 in JIS, hardness 183 HB ). The existence of reproducibility of the burr is established. The burr height is nearly equal to the half of the removal amount so that the burr can be considered as a roll-over burr. The base thickness, which is influenced by removal amount, feed and the interaction of them, has almost the same tendency as the neck thickness. The deburring time becomes shorter with larger media and heavier vibration, and rapidly increases as the base thickness becomes large. The surface of the workpiece becomes rougher with the deburring condition for shorter deburring time so that both the deburring time and the surface roughness must be considered for effective vibratory finishing.抄録全体を表示PDF形式でダウンロード (3291K) -
宮崎 俊行, 吉岡 俊朗, 白井 靖幸, 金釜 憲夫, 佐田 登志夫1985 年 51 巻 3 号 p. 596-601
発行日: 1985/03/05
公開日: 2009/06/30
ジャーナル フリーAcoustic emission generated in pulsed ruby laser drilling of alumina was detected by piezoelectric transducer and microphone ; moreover, stress wave in glass plate generated by deposition of vaporized material and molten particles was detected. Traces of generated waves and laser radiation were compared with one another. The workpiece is forced to vibrate by each spike of the laser radiation. The amplitude of vibration does not vary with the variation in spike power. The initial occurrence of the material removal and the ratio of the quantity of molten removal to that of vaporized removal are determined. It is also shown that detecting the stress wave amplitude of the workpiece can be utilized for determining the focussing condition of laser beam.抄録全体を表示PDF形式でダウンロード (6722K) -
前川 克廣, 北川 武揚1985 年 51 巻 3 号 p. 602-608
発行日: 1985/03/05
公開日: 2009/06/30
ジャーナル フリーThis paper investigates the effects of tool vibration and wear surface deterioration on scattering in flank wear of carbide cutting tools. When turning 0.46%C carbon steel with a carbide tool at relatively high speeds, the amplitude of vibration just under the cutting edge, which gives the minimum of wear rate on the flank wear land, appears. A hypothesis for explaining variations in the wear rate is proposed, in which changes of temperature and stress on the wear land and fatigue deterioration of the wear surface brings about the scattering, being induced by vibration between the tool and the work material. The vibration includes cases in which the wear land completely separates from the machined surface. Numerical analysis and special impact and/or thermal fatigue experiments prove that the hypothesis, in conjunction with a wear characteristic equation proposed elsewhere, holds qualitatively.抄録全体を表示PDF形式でダウンロード (6676K) -
酒井 茂紀, 増沢 隆久1985 年 51 巻 3 号 p. 609-613
発行日: 1985/03/05
公開日: 2009/06/30
ジャーナル フリーOne of the problems of using NC-wire EDM is that in some cases the quality of the machined surface is not sufficient. When a very smooth surface is required, a further finishing process is necessary. However, this takes time and man power. In this paper an application of wire ECM is proposed for this finishing purpose. The final'second cut' operation of wire EDM process is changed to pulsed wire ECM. Sodium nitrate solution is used as the electrolyte. The results of the experiments show the applicability of this method in practical use. It will lead the wire EDM process to a full automatic process including the final surface smoothing.抄録全体を表示PDF形式でダウンロード (4636K) -
古川 勇二, 大石 進, 北村 淳1985 年 51 巻 3 号 p. 614-619
発行日: 1985/03/05
公開日: 2009/06/30
ジャーナル フリーThis paper aims to establish an adaptive control principle which can avoid workpiece burn in creep feed grinding, and to evaluate the performance of the actual adaptive control system experimentally. Workpiece burn takes place when grinding energy flux φ (grinding energy per unit contact area per unit time) reaches to a certain limit. Therefore, it is necessary to suppress φ below the limit. For that purpose, it is considered that workpiece speed is controlled adaptively in accordance with the variation of φ, which is due to the deterioration of the grinding wheel working surface during grinding. Based on this principle, an adaptive control system is developed where a micro computer takes inprocess measurements of grinding force and wheel speed, calculates φ, which is compared with a constraint φc, and then assigns a new workpiece speed. Experimental results show that no workpiece burn occurs at all and grinding efficiency is improved by 10-40%.抄録全体を表示PDF形式でダウンロード (918K) -
樋口 静一, 花岡 忠昭1985 年 51 巻 3 号 p. 620-626
発行日: 1985/03/05
公開日: 2009/06/30
ジャーナル フリーA simulation of abrasive belt grinding process was carried out. In abrasive belt grinding, the height distribution of grain cutting edges changes with the advance of grinding time and the elastic deformation of contact wheel is the cause of the displacement of grain cutting edge position. So, the influence of the height distribution and elastic displacement of the grain cutting edges were investigated by the simulation. As a result of that, the mechanism of residual depth of cut and the finished surface roughness were analyzed theoretically in cylindrical plunge grinding. The obtained main results are as follows. (1) Residual depth of cut and finished surface roughness increase as the height distribution of grain cutting edges becomes wide. (2) In the case of using a rubber contact wheel, the displacement of grain cutting edges makes the residual depth of cut increased. But, the increase of effective cutting edges makes the finished surface roughness improved. (3) Residual depth of cut caused by the height distribution and displacement of the grain cutting edges is almost generated at the start of grinding. (4) It was found that there is an optimum rubber hardness of contact wheel.抄録全体を表示PDF形式でダウンロード (853K) -
膜厚の近似式と実験的な検討結果河村 末久, 三橋 道男, 清藤 憲生1985 年 51 巻 3 号 p. 627-632
発行日: 1985/03/05
公開日: 2009/06/30
ジャーナル フリーGrinding burn is related to the thickness of oxide layer which is formed on the finished surface of workpiece. Therefore, in this paper, the effects of oxidizing parameters, such as grinding temperature at the rear end of contact zone, attenuating coefficient of subsequent temperature, frequency factor or free activation energy of workmaterial and exposed time into the effective zone, on the grow up process and the final thickness of oxide layer have been analyzed. The relation between the final thickness of oxide layer and oxidizing factors has been summarized in approximate equation, and then the appropriateness of the equation has been examined under various condition of grinding.抄録全体を表示PDF形式でダウンロード (854K) -
吉村 允孝, 人見 勝人1985 年 51 巻 3 号 p. 633-639
発行日: 1985/03/05
公開日: 2009/06/30
ジャーナル フリーThis paper proposes a method for evaluating forced and self-excited vibrations at the design stage of machine structural systems. Cross modal flexibilities between the force-excited and the displacement-pick-up points are analyzed. The relationships between the highest allowable values of receptance and vibrational displacement, and the static compliance and modal flexibility are clarified. Then, the algorithms of the evaluative methods which use those analyses are given. Using the proposed method, natural modes which must be disregarded in the evaluation of the characteristics can be determined, 1) even when directional orientations of the excited force at points in regard change greatly as a result of states of operations or can not be definitely determined, and 2) even if damping properties are not clearly known. Designers can judge whether or not a given structural design has vibrational defects. The procedures of the evaluative method are exemplified with numerical examples.抄録全体を表示PDF形式でダウンロード (1212K) -
計量装置1台を装備する場合亀岡 紘一, 関口 久美, 松上 晃1985 年 51 巻 3 号 p. 640-645
発行日: 1985/03/05
公開日: 2009/06/30
ジャーナル フリーThe purpose of this study is to develop a new combination algorithm for the combination weigher equipped with a single weighing device. First, two types of combination algorithm (A-type and B-type) are proposed, showing a model configuration of the combination weigher. The A-type is an algorithm that has a simple combination procedure, but it requires many number of repetitive computations to find an optimal combination of goods. On the other hand, the B-type is an algorithm that is a little complicated, but it does not require many number of repetitive computations. In addition, the B-type has the very function for the purpose to adopt to the variation of the statistical properties of goods. Second, comparison is made of the two algorithms with respect to the combination efficiency by means of computer simulation. As the result, it is made clear that these combination efficiencies are sufficient in practice and that the B-type is successful for the variation of the statistical properties of goods. Third, to examine the feasibility of the algorithm, an experimental combination weigher with the B-type is made and, on the basis of the experimental result, problems to be solved for the development of the combination weigher are discussed.抄録全体を表示PDF形式でダウンロード (3175K)
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