精密機械
Print ISSN : 0374-3543
47 巻, 9 号
選択された号の論文の19件中1~19を表示しています
  • 樋渡 涓二
    1981 年 47 巻 9 号 p. 1029-1034
    発行日: 1981/09/05
    公開日: 2009/06/30
    ジャーナル フリー
  • 大塚 輝彌, 金子 章道
    1981 年 47 巻 9 号 p. 1035-1041
    発行日: 1981/09/05
    公開日: 2009/06/30
    ジャーナル フリー
  • 桜永 昌徳
    1981 年 47 巻 9 号 p. 1042-1048
    発行日: 1981/09/05
    公開日: 2009/06/30
    ジャーナル フリー
  • 外山 敬介
    1981 年 47 巻 9 号 p. 1049-1055
    発行日: 1981/09/05
    公開日: 2009/06/30
    ジャーナル フリー
  • 田中 康夫
    1981 年 47 巻 9 号 p. 1056-1062
    発行日: 1981/09/05
    公開日: 2010/02/16
    ジャーナル フリー
  • 佐藤 昌康
    1981 年 47 巻 9 号 p. 1063-1068
    発行日: 1981/09/05
    公開日: 2009/06/30
    ジャーナル フリー
  • 渋谷 達明, 松崎 治
    1981 年 47 巻 9 号 p. 1069-1075
    発行日: 1981/09/05
    公開日: 2009/06/30
    ジャーナル フリー
  • 横田 敏勝
    1981 年 47 巻 9 号 p. 1076-1080
    発行日: 1981/09/05
    公開日: 2009/06/30
    ジャーナル フリー
  • 久田 光彦
    1981 年 47 巻 9 号 p. 1081-1087
    発行日: 1981/09/05
    公開日: 2009/06/30
    ジャーナル フリー
  • 下沢 楯夫
    1981 年 47 巻 9 号 p. 1088-1095
    発行日: 1981/09/05
    公開日: 2009/06/30
    ジャーナル フリー
  • 小原 昭作
    1981 年 47 巻 9 号 p. 1096-1101
    発行日: 1981/09/05
    公開日: 2009/06/30
    ジャーナル フリー
    高感度電気受容のストラテジーについて, まとめとして述べよう.
    電気受容の末梢, 中枢機構を通じて, いくつかの共通した原則を認めることができよう.
    (1) 高感度の受容器を安定に動作させ, さらにS/N比を高めるための方法として, 一定のリファレンス信号の変調なる技術が使われている.非発電魚では, このリファレンスとして, 受容器内の機構によって発生する一定周波数の求心神経インパルス系列がキャリアとして利用される.弱電気魚でのリファレンスは, EODでドライブされた同調受容器からの特定のインパルスパターンであり, さらに複雑な情報抽出が可能となる.大別して, EODに対する時間または位相差と, 電場強度の2種の情報が, それぞれ別種の受容器によって検出される.
    (2) 中枢神経系は, 体表に分布する無数の受容器からの信号を入力として, 何段かのニューロン回路網を通じて, さらに複雑な特徴抽出を行う.ここでの過程は基本的には, シナプスにおけるゲート機構と考えられる.時間差と強度分布についての情報は, 少なくとも2種の系によって並行して処理され, この処理過程の結果は, 運動およびEODを調節する遠心系に伝えられて, 適切な行動反応 (JAR, 索餌など) がもたらされる.
    (3) 末梢, 中枢を通じて, いろいうな方法により時間的な平均加算の技術が応用されているのに気がつく. これはS/N比の改善により検出感度を相対的に向上させるが, 必然的に時間的解像力は低下する.多くの場合, この時間的解像力の低下は, 動物の運動反応EOD頻度の変化などによって補償されると考えられよう.
  • エネルギー解法による計算値と実測値との比較検討
    広田 明彦, 笠原 和夫
    1981 年 47 巻 9 号 p. 1102-1108
    発行日: 1981/09/05
    公開日: 2009/06/30
    ジャーナル フリー
    In the 1st part of this investigation a cutting mod-el considering the condition of side curl of the chip was proposed, and the energy method was extended to the case of drilling process for predicting the chip formation and the cutting forces. In this paper a dynamometer with piezo-electric load washer is constructed and used to measure the cutting forces. In order to freeze the actual process of chip formation for measurement of chip flow angles along the cutting edge, a quick-stop apparatus is also designed and constructed. The experimental tests are run with various pilot holes. The cutting forces and the chip formation such as chip flow angle, normal shear angle, radius of side curl of the chip are measured and compared with those from the theoretical prediction. It is clarified that the process of chip formation depends on the width of the engaged cutting edge with the workpiece. The predicted results appear to give good qualitative and quantitative explanations of the experimental results.
  • 秦 勝一郎, 矢野 宏
    1981 年 47 巻 9 号 p. 1109-1115
    発行日: 1981/09/05
    公開日: 2009/06/30
    ジャーナル フリー
    Several kinds of regression functions of SN curve for fatigue test have been suggested and the least squares method is used to determine parameters in each equation. In the case of a non-linear function, however, the application of the least squares method cannot always enough explain properties of objective lots. In this paper it has been clarified that the application of the experimental regression analysis is able to correct these defects and to estimate the parameters in the functions and regression error. In the experiment the lots of samples consist of specimen which have been manufactured considering materials, conditions of heattreatment, hardness of specimen, and so on. Fatigue strength (or SN curve) of each lot and overall estimated error are obtained by using the method of experimental regression analysis. The estimated error of the regression functions in this experiment is 21. 6-31. 4 MPa in standard deviation. As the application method of this new system in future, it is indicated that new obtained data of fatigue test in addition to the group of accumulated data are analyzed and that SN curves are able to be estimated consistently each other even when a number of new data is small.
  • マイクロコンピュータの応用
    大塚 二郎, 関根 文太郎, 金定 裕之
    1981 年 47 巻 9 号 p. 1116-1121
    発行日: 1981/09/05
    公開日: 2009/06/30
    ジャーナル フリー
    This paper presents the process of obtaining the leadscrew of high pitch accuracy in thread grind-ing. Leadscrews used for machine tools or length measuring machines often act as a standard scale. They are often ground after hardening. With the development of NC machine tools, their high level precision is needed. This paper describes the improvement of the control system by applying micro computer to the correction device of the table feed error in the thread grinding machine and the discussion of the table feed error and the lead error of the ground workpiece screw by use of Fourier analysis. As the result, the leadscrew with high pitch accuracy can be obtained.
  • 宮沢 伸一, 宮坂 金佳, 竹山 秀彦
    1981 年 47 巻 9 号 p. 1122-1127
    発行日: 1981/09/05
    公開日: 2009/06/30
    ジャーナル フリー
    This study is to investigate a methodology of automatic finish grinding of a curved surface generated in the previous process and to develop the prototype machine. The principle of this method is to control the feed motions of the grinding tool based on a definite relation between stock removal rate and torque actuated on the grinding tool. The machine consists of torque detector, analogue calculator to determine the horizontal and vertical feed rate components referring to the torque sensed, and servo mechanism. The drawback of this method that is the stock removal rate differs a little between positive and negative slopes of surface profile. The error can be tolerably reduced for practical application by refining the detecting system and by introducing an elastic finishing tool.
  • 結合剤の組成と砥石寿命
    小川 昌平, 岡本 隆
    1981 年 47 巻 9 号 p. 1128-1133
    発行日: 1981/09/05
    公開日: 2009/06/30
    ジャーナル フリー
    In the previous report, it was experimentally confirmed that mechanical properties of grinding wheels in equal grade were different when vitrified bonding material composition which consist of feldspar, pottery and clay minerals component varied. In this paper, the dry surface grinding experiments were performed on the grinding wheels which had different vitrified bonding material compositions and grinding forces and wear flat areas on the working surface of grinding wheels were measured, and then effects of the composition were studied. The results obtained are as follows. (1) The bending strength of grinding wheels are smaller than about 20 MPa or greater than about 30 MPa, most grinding wheels belong to shedding type or glazing, type respectively, and the grinding wheels belonged to both types are not related to the compositions and grades. (2) But if the bending strength is from about 20 to 30 MPa, the grinding wheel life depends remarkably on the composition in which contains feldspar component especially and percentage bond-ing material. (3) The bonding material containing a less feldspar component has low strength and poor adhesive ability. Therefore the grinding wheel using this bonding material must use more percentage bonding material than one containing more feldspar component for having a certain bending strength. Much percentage bonding material contributes to the increase of wear flat area on the grinding wheel and then the decrease of the grinding wheel life.
  • 酸化皮膜の形成過程
    河村 末久, 三橋 道男
    1981 年 47 巻 9 号 p. 1134-1139
    発行日: 1981/09/05
    公開日: 2009/06/30
    ジャーナル フリー
    In order to estimate the thickness of oxide layer, which is formed on the finished surface of workpiece and yields the discoloration of the ground surface, it is necessary to know the oxidation rate law of workpiece and the surface temperature in process of the growing layer. Therefore, in the present research, the rate process on various steels have been measured with the specially prepared samples and the property of the oxide layer is also analyzed. And as the results of the interferometry, it is verified that the thickness (d) of the layer with times (τ) is given by d= (Hτ) 1/3, where H is the oxidation rate constant and could be related to temperature by the Arrhenius' equation.
  • 林 輝
    1981 年 47 巻 9 号 p. 1140-1141
    発行日: 1981/09/05
    公開日: 2009/06/30
    ジャーナル フリー
  • 岡田 昭次郎
    1981 年 47 巻 9 号 p. 1142-1143
    発行日: 1981/09/05
    公開日: 2009/06/30
    ジャーナル フリー
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