巻号一覧
後続誌
41 巻, 490 号
選択された号の論文の10件中1～10を表示しています
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ワット浴の流動電解液による高速電鋳ニッケルに対する応力減少剤添加の効果山本 正興, 佐藤 敏一1975 年 41 巻 490 号 p. 1038-1042
発行日: 1975/11/05
公開日: 2009/06/30
ジャーナル フリーThe purpose of this study is to discuss the effects of stress decreasing agents on high speed electroformed nickel by flowing electrolyte of Watt's solution. 1, 5-naphthalenedisulfonic acid disodium salt and saccharine are used as stress decreasing agents. The obtained results are as follows:
(1) Tensile stress in electroformed nickel is decreased and compressive stress is increased by addition of stress decreasing agents.
(2) In adding 1, 5-naphthalenedisulfonic acid disodium salt, zero stress is obtained in the narrow extent of current density, but in saccharine, that is obtained in the wide extent (from 80 A/dm2 to 120 A/dm2).
(3) The hardness of electroformed nickel is in the extent from 400 to 600 in Vickers hardness in adding stress decreasing agents
(4) Lamellar structure is observed in adding both stress decreasing agents. Electroformed nickel contains sulfur from O. 03% to 0. 06% by weight.抄録全体を表示PDF形式でダウンロード (1082K) -
真空切削の研究(第2報)上原 邦雄, 檀原 袈裟男1975 年 41 巻 490 号 p. 1043-1049
発行日: 1975/11/05
公開日: 2009/06/30
ジャーナル フリーThis paper deals the cutting behavior of copper and aluminum in vacuum machining in which the materials were turned by specially made lathe at 40 m/min of cutting speed and under the reduction of pressure up to 10-4 mmHg. It was found that the cutting characteristics such as cutting force, cutting ratio etc. are not influenced by the degree of vacuum in machining tough pitch copper, oxygen free copper and 98% aluminum, however, they are affected in machining high purity aluminum. This is a contrasting result compared with the former paper in which the cutting behavior of carbon steel and titanium was examined. In order to clarify the cause of above phenomena, the experimental data were examined in detail basing on five factors which would affect the state of cutting in vacuum machining. As the result, it is cleared that the constancy of the cutting force in machining tough pitch copper and oxygen free copper is due to the nearly equal shear strength of adsorption layer or oxide film at the tool-chip interface compared with that of metallic contact part of the interface. Further, it is concluded that the cutting behavior of aluminum is affected strongly by the existence or the formation of γ alumina at tool-chip interface.抄録全体を表示PDF形式でダウンロード (1649K) -
一変数の標本化定理瀧澤 英一1975 年 41 巻 490 号 p. 1050-1054
発行日: 1975/11/05
公開日: 2009/06/30
ジャーナル フリーA generalization of the sampling theorem is presented, taking the sampled higher order derivatives of a function into account. Mathematical properties of the sampling expansion formula obtained in this paper are also discussed in some detail. Examples of sampling formulae are suggested, which include the formulae given by Lagrange, Shannon, Someya, Takizawa, Kroll, Isomiti, van der Pol, Jagerman-Fogel, and Linden-Abramson, as special cases of the present theorem. Formulae given here can be effectively applied to interpolation or extrapolation formulae, which play an important role in the fields of numerical control, such as splinefunction analysis, computer-aided design, and computer-aided manufacturing.抄録全体を表示PDF形式でダウンロード (585K) -
ラッピングによる残留応力と変形(第1報)宇根 篤暢, 河西 敏雄1975 年 41 巻 490 号 p. 1055-1059
発行日: 1975/11/05
公開日: 2009/06/30
ジャーナル フリーIt is difficult to obtain a high degree of flatness on thin aluminum alloy plates because of residual stress by lapping. This paper reports on theoretical analysis of deformation of disks at various thicknesses. The residual stress is seperated into original stress due to lapping and secondary stress caused by deformation depending on thickness. Equations calculating the amount of deformation of circular plates using the former stress are then induced. Experimental results determined by measurements made while removing successive uniform thin layers in various lapping conditions show that depth of worked layers and distribution of residual stresses depend on grain size. Numerical values calculated by the above equations are in good agreement with flatness values on 70 mm diameter lapped model disks.抄録全体を表示PDF形式でダウンロード (851K) -
工作機械の動特性解析法の研究(第3報)吉村 允孝1975 年 41 巻 490 号 p. 1060-1065
発行日: 1975/11/05
公開日: 2009/06/30
ジャーナル フリーA new program system was developed for computing the static and dynamic characteristics of machine structures and helping the designer to get the optimum machine with respect to those characteristics. The program system is a new method which combines the advantages of the synthetic technique of the receptance program system with the finite element modeling of the machine sub-structures. The function of the program system is to compute static rigidities, frequency responces, natural frequencies, mode shapes, energy distributions and modal flexibilities. In order to attain dynamically optimum design of machine tools which would have minimum chance of machining chatter, the analysis based on energy balances of a mechanical system at the resonance is endeavored by the use of this program system. This optimization process aims that the maximum compliance of the tool-work relative displacement in the direction normal to cut surface caused by the cutting force at the cutting point must be minimum across all frequency ranges. The optimization principle is based on the computation of modal flexibilities and energy distributions. The analytical principle of the program system is described and demonstrated by computed and experimental results on a practical structure.抄録全体を表示PDF形式でダウンロード (1272K) -
研削サイクルの解析中島 利勝1975 年 41 巻 490 号 p. 1066-1071
発行日: 1975/11/05
公開日: 2009/06/30
ジャーナル フリーThe accumulation phenomenon in plunge grinding dominates the process and then leads to the existence of three distinct grinding states in one cycle, a spark-in, a steady and a spark-out state. In this paper the accumulation phenomenon is analytically described in terms of the wheel wear rate, the size generation acceleration, the grinding system stiffness, the contact stiffness and the cutting stiffness, which are characteristic parameters of the process. It is then pointed out that variations of the grinding force, the amount of size generation, the stock unremoved through a grinding cycle and the grinding cycle time can be predicted by the characteristic parameters.抄録全体を表示PDF形式でダウンロード (854K) -
19741220沢辺 雅二, 山本 健太郎, 竹山 秀彦, 佐藤 素, 佐藤 信夫, 平井 誠, 大井 真次, 宮田 宗平, 巣山 博美1975 年 41 巻 490 号 p. 1072-1077
発行日: 1975/11/05
公開日: 2010/02/16
ジャーナル フリーThe variation of error of cylindrical form is investigated experimentally in the turning of workpieces held in chuck under the conditions arranged not to be influenced by the amount of the skill of operators. The experiment consists of such four kinds of tests as turning of brass workpieces in nine kinds of size under the same conditions at six local laboratories, turning of nine workpieces of carbon steel or cast iron at each laboratory for the comparison with brass, turning of nine brass workpieces at fourteen lathes used in six factories by an operator, and replication of the turning every several months on one of the lathes used in the first test. The results are as follows: (1) The form error of workpieces is influenced by dimension and material of workpieces, and, moreover, influenced considerably by the characteristics of lathes, which give different effects individually on the form error of workpieces. (2) The variation of diameters of workpiece along axis sometimes exceeds 20 μm, the tolerance in the Japanese Industrial Standard (JIS), even if the accuracy of the lathe satisfies the test code specified in JIS. (3) In the replication, the variation of diameters of workpieces shows a larger value than the tolerance. (4) Some of the lathes in the factories produce a large variation of diameter of workpieces. Therefore, it is important to maintain the accuracy of lathes and it is necessary to grade lathes by the tests of the machining accuracy.抄録全体を表示PDF形式でダウンロード (1043K) -
渡部 和信, 横山 和宏, 一宮 亮一1975 年 41 巻 490 号 p. 1078-1083
発行日: 1975/11/05
公開日: 2009/06/30
ジャーナル フリーThis paper presents the development of thermal and experimental analyses of the temperature distribution for a workpiece and drill. Thermal deformations of the workpiece and drill are analyzed. Temperature distribution of unsteady state and thermal deformation of the workpiece with a moving heat source are calculated. Displacement of inner surface of the drilled workpiece is also calculated for some drilling conditions. The results indicate that the calculated temperatures of the workpiece and drill are found to be close to the experimental results, and maximum inner diameter of the drilled hole appears near the end of drilling. Thermal factor is outstanding in determining the geometrical accuracy of the drilled hole.抄録全体を表示PDF形式でダウンロード (1035K) -
変形熱源に対する制御竹内 芳美, 大久保 信行, 佐田 登志夫1975 年 41 巻 490 号 p. 1084-1089
発行日: 1975/11/05
公開日: 2009/06/30
ジャーナル フリーThe study concerns the control of the temperature distribution of a machine tool structure containing several varying heat sources and control sources. For this purpose, state equations of the machine tool temperature are formulated by utilizing the finite element method and an optimal control sequence is obtained by the linear programming method as a time-optimal control problem. In case of a very complicated structure of a machine tool, computing time to obtain the control sequence is considerably shortened by limiting reference points in com-putation without affecting the accuracy. The above method can be applied to a case for shortening the warming-up period of a machine tool as well as for varying heat sources. The validity of the control is experimentally confirmed.抄録全体を表示PDF形式でダウンロード (984K) -
円筒プランジ研削のびびり(第3報)鴻巣 健治1975 年 41 巻 490 号 p. 1090-1095
発行日: 1975/11/05
公開日: 2009/06/30
ジャーナル フリーThe self-excited chatter vibration in cylindrical grinding belongs to the wheel regenerative chatter. But in early grinding time, it can be modeled on the parametric vibration system based on the variation of the wheel periphery. The principle of the chatter suppression is that on the stability chart for the equation of motion the unstable grinding state is converted into the stable one with the change of the grinding condition. The suppressive effect of chatter is confirmed experimentally by the change of the work- and the wheel-velocity. In case of the change of the work-velocity, the suppression of the chatter is almost no effective. But in changing the wheel-velocity, the chatter frequency changes and so the suppressive effect of chatter is expected. The experiment reduced the wheel-velocity shows the effective result.抄録全体を表示PDF形式でダウンロード (1037K)
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