精密機械

3次元のリンク装置

小川潔

1966 年 32 巻 383 号 p. 805-811
発行日: 1966/12/05
公開日: 2009/06/30

DOIhttps://doi.org/10.2493/jjspe1933.32.805

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せん断形切りくず生成機構の塑性学的解析 (第1報)

実験および解析の方法について

臼井英治

1966 年 32 巻 383 号 p. 812-819
発行日: 1966/12/05
公開日: 2009/06/30

DOIhttps://doi.org/10.2493/jjspe1933.32.812

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A method of analysis of both continuous and discontinuous chip formations by using the extended Hencky's equations for variable flow stress and the principle of visioplasticity is proposed in a concrete form.
An example of digital computer program for calculating strain increments, direction of slip line and magnitude of maximum shear strain increment from observed displacement of the engraved grid lines on work-piece is proposed.
Experimental set-up and techniques for the proposed method are described.

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研削砥石の目つまりの研究 (III)

砥石面の形態と目つまりの状態について

重松日出見

1966 年 32 巻 383 号 p. 820-824
発行日: 1966/12/05
公開日: 2009/06/30

DOIhttps://doi.org/10.2493/jjspe1933.32.820

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This experiment was carried out on the following :
1. Relation between the irregular wheel surface and loading.
2. Back scattering of β-rays and loading on the wheel surface.
The following conclussion was obtained :
The loaded quantities per unit area generated in grinding vary with the difference of the distributional forms of abrasive grain, bond and pore on the wheel surface.

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正誤表

1966 年 32 巻 383 号 p. 824a
発行日: 1966年
公開日: 2010/02/16

DOIhttps://doi.org/10.2493/jjspe1933.32.383_824a

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正誤表

1966 年 32 巻 383 号 p. 824b
発行日: 1966年
公開日: 2010/02/16

DOIhttps://doi.org/10.2493/jjspe1933.32.383_824b

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チェーンリンクプレートの疲れおよび衝撃強さに及ぼすショットピーニングの効果

中込昌孝

1966 年 32 巻 383 号 p. 825-830
発行日: 1966/12/05
公開日: 2009/06/30

DOIhttps://doi.org/10.2493/jjspe1933.32.825

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In this report, the fatigue strength and repeated impact strength of the chain link-plates sub-jected to shot peening are shown. The experimental results are as follows.
1) The fatigue strength is improved to the increase of about 85% when the chain link-plates are subjected to shot peening on the condition that shot diamater is 0.5mm, peening time 20 min, pass number 10kg. times, shot speed 38 m/s, arc-hight 0.32mm, Coveraige 82.1% andtotal weight of shot 75
2) In the case of repeated impact with impact energy from 20kg·cm to 50kg·cm, the effect of shot peening is a little. And with comparatively high impact energy from 81kg·cm to 556kg·cm, the effect of shot peening is not significant.

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3点法真円度測定法の-展開

青木保雄, 大園成夫

1966 年 32 巻 383 号 p. 831-836
発行日: 1966/12/05
公開日: 2009/06/30

DOIhttps://doi.org/10.2493/jjspe1933.32.831

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A new method of roundness measurement of machine elements based on the three-point method is studied. In this method a workpiece is surrounded with three detectors M₁, M₂ and M₃, each of which is different in its detective magnification, and is able to rotate freely in them. The outputs of detectors are summed together and are indicated on a indicator.
The rotational error of a workpiece (eccentric motion or play of rotating centre) does not appear on the indicator if the relative angular positions of the detectors r (between M₁ and M₂) and φ (between M₁ and M₃) are adequately arranged. Let the ratios of the detective magnifications of the detectors M₁, M₂ and M₃ be 1 : a : b, then the combinations of (τ, φ) or (a, b) can be selected as follows so as to cancel the rotational error of a workpiece.
1 + a cos τ b cos φ = 0 asinτ-sinbφ=0
These equations correspond to the magnifying power of the Fourier coefficient of first order of workpiece profile Under these conditions the combinations of (τ, φ) and (a, b) are calculated numerically in which the magnifying powers of the Fourier coefficients of the higher order of workpiece profile are as large as possible.
It is proved experimentally, that this method can be used practically for measuring roundness without any high precision turn device.

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円筒研削盤におけるクラッシングの研究

鈴木憲二, 鈴木弘, 高橋邦夫

1966 年 32 巻 383 号 p. 837-845
発行日: 1966/12/05
公開日: 2010/02/16

DOIhttps://doi.org/10.2493/jjspe1933.32.837

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The advantages of the crush-dressing has been already highly evaluated, but the example of it's adoption on the cylindrical grinding machine for common use has been little seen.
In this report, the authors made the nomogram which enables to select the best condition in crush-dressing on the cylindrical grinding machine, for common use, for the rigidity of machine, grinding wheel, grinding width, and so on, by which the operator can understand easily such a condition. At the same time the native crushing pressure, which is the basis of crush-dressing, of evey grinding wheel is researched fully, and the crush-dressing mechanism is also surveied. It was proved in these studies that there are in the crush-dressing the following three domains ; the initial crushing, normal crushing, crushing-out.
The result of the above mentioned studies led to know how to reduce the wears of roll and grinding wheel and, furthermore, to know that there is really the limit in grinding by means of crushdressing.
These studies were performed with the expect that their results should put the crush-dressing to the practical use.

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受信管の量産技術

成瀬恭二郎

1966 年 32 巻 383 号 p. 846-856
発行日: 1966/12/05
公開日: 2009/06/30

DOIhttps://doi.org/10.2493/jjspe1933.32.846

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モワレじまの光学とその応用

清水嘉重郎

1966 年 32 巻 383 号 p. 857-864
発行日: 1966/12/05
公開日: 2009/06/30

DOIhttps://doi.org/10.2493/jjspe1933.32.857

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