Journal of the Japan Society of Precision Engineering
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Volume 23, Issue 269
Displaying 1-8 of 8 articles from this issue
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  • [title in Japanese]
    [in Japanese]
    1957 Volume 23 Issue 269 Pages 299-304
    Published: July 05, 1957
    Released on J-STAGE: June 30, 2009
    DOIhttps://doi.org/10.2493/jjspe1933.23.299
    JOURNAL FREE ACCESS
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    [in Japanese]
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  • Researches on Buffing
    Yukio TANATKA
    1957 Volume 23 Issue 269 Pages 305-308
    Published: July 05, 1957
    Released on J-STAGE: June 30, 2009
    DOIhttps://doi.org/10.2493/jjspe1933.23.305
    JOURNAL FREE ACCESS
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    The grease-base buffing compound or composition in bar form for producing a color finish is composed of the finest abrasive grains in a binder composed of stearic acid, tallow and resin etc.
    The last paper was a report on the study of commercial experiment by using the composite compound, and it was difficult to analyse the buffing mechanism in detail.
    The present paper deals with the study of the influences of elements of a buffing compound.
    All the observations that have been made can be explained as such that the buffing efficiency was influenced exceedingly by the charactor of stearic acid or grease.
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  • Study on the Grinding Action
    Takafuyu OCHI
    1957 Volume 23 Issue 269 Pages 308-311
    Published: July 05, 1957
    Released on J-STAGE: June 30, 2009
    DOIhttps://doi.org/10.2493/jjspe1933.23.308
    JOURNAL FREE ACCESS
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    In the first report theoretical and experimental analyses for roughness of ground surface are shown.
    In this report the relations of theoretical roughness H to measured value Hmax are discribed and it is tried to decide the numerical values of factors relating to the grinding conditions, work materials or characteristics of wheel.
    As there are many conditions influencing on the grinding action, measured data on Hmax are distributed in extensive bounds. But they can be arranged simply by adopting a dimensionless factor hmax (=Hmax/T, provisionally named Relative Roughness), and thus they lie in the region of 0 to 1 theoretically : actually there are measured values of more than 1. It is proved that these analyses on the roughness of ground surface are practically reliable and that the values of e must be investigated still more as the function of NB/S and T.
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  • On the Indentations of Impact by Steel Balls
    Makoto OKOSHI, Kisuke IIDA
    1957 Volume 23 Issue 269 Pages 312-315
    Published: July 05, 1957
    Released on J-STAGE: June 30, 2009
    DOIhttps://doi.org/10.2493/jjspe1933.23.312
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    In order to obtain the relations between the indentations and the conditions of impact as the basis for shot peening, flat piece of steel was clamped to a large solid block and shot by hard steel ball.
    The result obtained is expressed by equations (1) (5) in the paper with the following nomenclature : d, h, V=chordal diameter, depth and volume of indentation, D, v=diameter and velocity of steel ball, kd, kh, kv =material constant.
    Force of impact is connected to the equivalent static pressure (P) from the chordal diameter of indentations penetrated by the method above mentioned and static loading by the Vickers hardness testisting machine.
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  • On the Non-linearity of Watch Hairsprings (Part IV)
    Yasujiro OSHIMA
    1957 Volume 23 Issue 269 Pages 315-323
    Published: July 05, 1957
    Released on J-STAGE: February 16, 2010
    DOIhttps://doi.org/10.2493/jjspe1933.23.315
    JOURNAL FREE ACCESS
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    In the preceding report, the author tried the theoretical analysis concerning the influence of the strain at the outer fixed point of the hairspring and found the coincidence with the experimental results. However, the variation of the oscillation period derived from the same theoretical basis differed from the experimental results to some extent.
    In order to make the source of this difference clear, he measured the displacements of the outer terminal of the hairspring model supported as the free end spring and compared with the theoretical Values.
    He also measured the reaction forces at the fixed outer terminal of the hairspring model. The results of measurement and considerations of them are described in this report.
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  • Electric Discharge Cutting of Carbon
    Shigeyuki SHINOHARA
    1957 Volume 23 Issue 269 Pages 324-326
    Published: July 05, 1957
    Released on J-STAGE: June 30, 2009
    DOIhttps://doi.org/10.2493/jjspe1933.23.324
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    In electric-discharge cutting of carbon, author has obtained a few results as follows;
    (1) For the electric-discharge cutting of carbon, water is better than water-glass as the working fluid.
    (2) In electric-discharge cutting in water, the feed of the work should be done not by contact pressure method but by automatic feed method, which enables to maintain the discharge gap constant.
    (3) There is no difference of the electric-discharge cutting speed between graphite and amolphous carbon.
    (4) By a suitable method of automatic feed, the cutting speed of carbon by electric-discharge cutting will be pretty larger than that previously considered. Its practical use is of great promise.
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  • [title in Japanese]
    [in Japanese]
    1957 Volume 23 Issue 269 Pages 327-331
    Published: July 05, 1957
    Released on J-STAGE: June 30, 2009
    DOIhttps://doi.org/10.2493/jjspe1933.23.327
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    1957 Volume 23 Issue 269 Pages 337-338
    Published: July 05, 1957
    Released on J-STAGE: June 30, 2009
    DOIhttps://doi.org/10.2493/jjspe1933.23.337
    JOURNAL FREE ACCESS
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