精密機械
Print ISSN : 0374-3543
39 巻, 466 号
選択された号の論文の16件中1~16を表示しています
  • 谷口 紀男
    1973 年 39 巻 466 号 p. 1084-1086
    発行日: 1973/11/05
    公開日: 2009/06/30
    ジャーナル フリー
  • 坂田 勝
    1973 年 39 巻 466 号 p. 1087-1093
    発行日: 1973/11/05
    公開日: 2009/06/30
    ジャーナル フリー
  • Fitzgeraldの粒子波説
    兵藤 申一
    1973 年 39 巻 466 号 p. 1094-1099
    発行日: 1973/11/05
    公開日: 2009/06/30
    ジャーナル フリー
  • 河西 敏雄, 井田 一郎
    1973 年 39 巻 466 号 p. 1100-1104
    発行日: 1973/11/05
    公開日: 2010/02/16
    ジャーナル フリー
  • 原 昭夫
    1973 年 39 巻 466 号 p. 1105-1110
    発行日: 1973/11/05
    公開日: 2010/02/16
    ジャーナル フリー
  • 池田 正幸
    1973 年 39 巻 466 号 p. 1111-1117
    発行日: 1973/11/05
    公開日: 2009/06/30
    ジャーナル フリー
  • 尾田 十八
    1973 年 39 巻 466 号 p. 1118-1124
    発行日: 1973/11/05
    公開日: 2009/06/30
    ジャーナル フリー
  • 海野 邦昭
    1973 年 39 巻 466 号 p. 1125-1133
    発行日: 1973/11/05
    公開日: 2009/06/30
    ジャーナル フリー
    研削砥石の弾性的性質に関する研究の動向は,
    (1)砥石の弾性的性質を破壊現象と結びつけて理論的に考察し,砥石の設計に役立てようとするもの.とりわけ許容されるべき安全遠心破壊強度をもつ砥石を設計しようとするもの.
    (2)砥石組成と弾性的性質との関係から,砥石製造上の再現性のチェック,砥石の組成むらや砥石中の欠陥の発見および回転破壊強度などの品質管理に関するもの.
    (3)砥石の弾性的性質を砥石の摩耗や日立間寿命と関連して考察し,研削作業の砥石選択の日安に役立てようとするもの.
    (4)砥石局部の弾性を研削現象と関連して考察し,研削現象を解明しようとするもの.
    などに分類でき,今後の成果が期待される.
  • 単結晶の微視的変形破壊機構に関する研究(第1報)
    吉岡 正人
    1973 年 39 巻 466 号 p. 1134-1139
    発行日: 1973/11/05
    公開日: 2009/06/30
    ジャーナル フリー
    The micro-indentation test of silicon single crystal was performed under the temperature between 20°C and 1000°C. The plastically deformed zone around the indentation mark has been measured by means of oblique section using electron microscope and optical microscope. Furthermore, using Hill's spherical shell model, the yield points under various temperatures are able to be reasonably estimated from experimentally obtained data. Concerned with the condition of the crack initiation or the plastically deformed zone, the calculated values based on the spherical shell model are compared with experimental values.
    The main results obtained are as follows:
    (1) The plastically deformed zone is nearly bell shape, but has the neck part at the depth of several microns below the surface. The total depth of deformed zone is 20-30% deeper than the values obtained from spherical shell model. The extent of the zone is extremely affected with temperature.
    (2) The cracks of several microns in length are often observed in the vicinity of indentation mark even at the temperatue over 500°C in spite of the estimation deduced from the spherical shell theory that, at these temperature, the crack should not initiate in. Therefore, the initiation of these cracks may be considered to depend on other causes, for example, internal stress originated from cooling.
  • 松野 外男, 山田 弘, 桑原 千三
    1973 年 39 巻 466 号 p. 1140-1145
    発行日: 1973/11/05
    公開日: 2009/06/30
    ジャーナル フリー
    ビトリプァイド研削砥石の破面をSEMによって観察した結果から,次のようなことが知られた.
    (1)高倍率で破面の局部的な模様を詳細に観察すれば,破壊過程の推論に役立つ情報を得ることが可能である.
    (2)砥粒の破面にはしばしば各種のへき開面が現われ,砥粒の破壊特性はその結晶的な性質に影響される.
    (3)結合剤の破面は貝殻状破面が多いが,き裂の伝ぱ状態によって各種の模様が現われる.
    (4)研削砥石の破壊は結合剤部分だけに起こるものではなくて砥粒からの破壊が多く,特に高強度の砥石では結合剤部分が強いためにその傾向が著しい.したがって砥石の破壊特性は砥粒の破壊特性によって影響される.砥石破面における砥粒および結合剤の破面の面積率は,砥粒率,結合剤率の1/2に近い.
    (5)砥石破面の特徴は多数の独立した砥粒および結合剤の破面によって構成されていることであるが,結合剤量の多い砥石,組織の密な砥石,粒径の小さい砥石では砥粒と結合剤を貫通する破面が多くなる.
    (6)気孔部分やボンドブリッジの縦断面ではき裂伝ぱの緩和現象が見られる.
  • 正野崎 友信, 石渡 秋二
    1973 年 39 巻 466 号 p. 1146-1150
    発行日: 1973/11/05
    公開日: 2009/06/30
    ジャーナル フリー
    This paper describes the exo-electron emission phenomena from the various abrasive grains which are practically used in the grinding wheel or as the lapping powder. The effects of the heat-treatment and the fracture of the test grains on the exo-electron emission were examined. The main results obtained are as follows:
    (1) Al2O series grains gave a strong emission intensity, specially the white-alumina grain a stronger intensity, and the alumina grain, the single crystal grain and the zirconia alumina grain an intermediate intensity. But SiC series grains gave no emission.
    (2) In the glow curves the emission intensity from the grains after the heat-treatment remarkably decreased. And the emission intensity increased again from the grains which were fractured after the heat-treatment.
    (3) In the experiments which the emission intensity from grains fractured at a constant condition was measured, the relation between the size of the test grain and the emission intensity is proportional.
    (4) The emission decay curve obtained with the fractured grain showed the same inclination such as the decay curve from the mechanically deformed metal surface.
  • 断続切削の基礎研究(第2報)
    井川 直哉, 稲見 靖
    1973 年 39 巻 466 号 p. 1151-1157
    発行日: 1973/11/05
    公開日: 2009/06/30
    ジャーナル フリー
    This paper deals with the effect of the initial engagement (or "impact") of the tool with the workpiece on the tool wear in interrupted cutting. At the initial engagement, the transient vibration takes place between the tool and the workpiece depending upon the intensity of the impact and the dynamic parameters of the tool-workpiece system. The fluctuation in cutting speed due to the transient vibration is assumed to be the dominant cause of an increased tool wear in interrupted cutting. Based on the assumption, an analog simulation is performed for the dynamic behaviour of the elements and the tool wear in a tool-workpiece system of a simple lumped parameter structure. The simulation shows the increased tool wear in an interrupted cutting up to about 8 times as high as in the continuous (or vibration-free) cutting. The effects of the dynamic parameters of the system on the tool wear are also described quantitatively.
  • 竹山 秀彦, 宮沢 伸一, 宮坂 金佳, 馬嶋 武彦
    1973 年 39 巻 466 号 p. 1158-1163
    発行日: 1973/11/05
    公開日: 2009/06/30
    ジャーナル フリー
    Although belt grinding has recently been regarded as an equally important and popular processing to ordinary grinding, few of systematic or quantitative investigation have been conducted, this leaving belt grinding at the stage of sophisticated know-hows. From this standpoint belt grinding is one of the most effective and attractive application field of adaptive control.
    In belt grinding the continuous increase of contact pressure has been experimentally demonstrated to be highly advantageous from the viewpoint of economics. The objective function of grinding cost which is the function of contact pressure and belt life has been introduced as a general state equation. By determining the constants involved in the equation in an on-line manner and anticipating the cost successively, the optimal mode of pressure increase and belt life can be obtained.
  • 関口 博, 竹山 秀彦
    1973 年 39 巻 466 号 p. 1164-1167
    発行日: 1973/11/05
    公開日: 2009/06/30
    ジャーナル フリー
    There has been no tool life equation or data in turning at continuously varying cutting speed, although it is highly needed especially for NC programming. Here in this paper, starting from the differential equation of tool wear, the equivalent tool life equation has been derived analytically. The tool life is expressd as a function of the outer most peripheral speed and the ratio of outer diameter of the workpiece and inner diameter. The validity of the mathematical model has been verified by the actual tool life tests.
  • 表面おうとつ微小突起の傾斜の評価(第1報)
    塚田 忠夫, 阿武 芳朗
    1973 年 39 巻 466 号 p. 1168-1173
    発行日: 1973/11/05
    公開日: 2009/06/30
    ジャーナル フリー
    Characteristics of surface asperities are generally represented by a statistic of projection slopes and asperity heights. This paper deals with a distribution of projection slopes and its standard deviation. Surfaces dealt with in this paper are ground, turned, milled, shaped and lapped. The data of surface asperities are handled in a discrete type. Results were as follows.
    (1) The theoretical slope distribution induced about ground surfaces can be applied to others.
    (2) The relationship between the standard deviation of slopes and that of asperity heights is given quantitatively.
    (3) The suitable sampling space of surface asperities are revealed.
  • 大嶋 清治, 舟久保 熙康
    1973 年 39 巻 466 号 p. 1174-1178
    発行日: 1973/11/05
    公開日: 2010/02/16
    ジャーナル フリー
    Pour réaliser le positionnement précis des appareils qui servent la méthode magnétique, la prédétermination des facteurs magnétiques, en particulier la valeur de Perméance, est très importante sur le dessin du circuit magnétique à construire. Cependant, l'analyse du circuit magnétique est très difficile jusqu'à présent, et les facteurs magnétiques sont en général déterminés expérimentalement. Parmi les méthodes d'analyse théorique de dit circuit, la méthode connue de H. C. Roters, c'est-à-dire, une méthode mathématique ne permet que de calculer la valeur de Perméance entre les poles magnétiques dont l'un est en face de l'autre. Par conséquent, nous avons étudié une méthode mathématique nouvelle, en développant l'idée de dite méthode, qui permet de calculer les valeurs de Perméance dans n'importes quelles positions relatives de ces deux poles. Et ensuite, nous avons évalué cette nouvelle méthode en l'appliquant sur les appareils de moteur linéaire fondant à l'idée de Soya et comparé les résultats de calcule avec ceux d'expérience. L'écart de l'ordre de 10% entre ces deux courbes est constaté et il sera suffisant pour les appareils magnétiques du mouvement de précision ordinaire. Mais, par l'introduction de deux coefficients de correction supplément, SK1, et SK2, nous avons pu obtenir une coincidence parfaite entre les courbes calculées et expérimentales. Par ces résultats, nous pouvons tout de suite analyser le phénomène de saut (cogging), la force motrice, la vibration etc. de l'appareil.
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