Journal of the Japan Society of Precision Engineering
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Volume 25, Issue 299
Displaying 1-6 of 6 articles from this issue
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  • [title in Japanese]
    [in Japanese]
    1959 Volume 25 Issue 299 Pages 525-531
    Published: December 05, 1959
    Released on J-STAGE: June 30, 2009
    DOIhttps://doi.org/10.2493/jjspe1933.25.299_525
    JOURNAL FREE ACCESS
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    [in Japanese]
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  • Secondary flaws in polished layers
    Studies on Polishing of Quartz-Plates (4th Report)
    Ichiro IDA, Yuzo ARAI
    1959 Volume 25 Issue 299 Pages 532-538
    Published: December 05, 1959
    Released on J-STAGE: June 30, 2009
    DOIhttps://doi.org/10.2493/jjspe1933.25.299_532
    JOURNAL FREE ACCESS
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    The cause and the depths of secondary flaws are studied by scratching and polishing technique. The residual stress is calculated under the simplified conditions, and the model section of polished surface is given.
    The results obtained are as follows :
    (1) The fracture by tension causes the secondary flaws.
    (2) The depths of flaws before etching are of the order 20010, 000A°
    (3) The residual skin stress is more 40 times larger than the average stress.
    (4) The depth of the polished layer is of the order 40A°. Secondary flaws have an effect on the deformation at depths of 40700A°, and deepest scratches show their previous traces down to 30, 000Å.
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  • [title in Japanese]
    [in Japanese]
    1959 Volume 25 Issue 299 Pages 538-544
    Published: December 05, 1959
    Released on J-STAGE: June 30, 2009
    DOIhttps://doi.org/10.2493/jjspe1933.25.299_538
    JOURNAL FREE ACCESS
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  • Study on the Uneveness of Transmission by Roller-Chain (4 th report)
    On the Elimination of the Uneveness of Transmission
    Makoto OKOSHI, Kunio UEHARA
    1959 Volume 25 Issue 299 Pages 545-551
    Published: December 05, 1959
    Released on J-STAGE: June 30, 2009
    DOIhttps://doi.org/10.2493/jjspe1933.25.299_545
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    In order to eliminate the uneveness of transmission by roller-chain, three methods of elimination were studied theoretically and some experiments were carried out for testing the performance of a method which was considered to be most effective among these three methods. The principle of this method is to linearize the vibrational character of the roller-chain driving system and to absorb the uneveness of transmission at dynamic region by deflecting the tight strand of the roller-chain by leaf spring.
    In these experiments, it was clarified that the absorption of the uneveness of transmission was done when following conditions were satisfied, i.e. (1) The deflection of the roller-chain was larger than a finite value determined from experiment. (2) The frequency of the uneveness of transmission which was the object of absorption was higher than the natural frequency (formula 6) of the roller-chain driving system. (3) Suitable damper which damps the free oscillation of the roller-chain driving system was applied. (4) The mass of the tight strand of the chain was smaller than the equivalent mass of sprocket wheels.
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  • [title in Japanese]
    1959 Volume 25 Issue 299 Pages 552-587
    Published: December 05, 1959
    Released on J-STAGE: June 30, 2009
    DOIhttps://doi.org/10.2493/jjspe1933.25.299_552
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    1959 Volume 25 Issue 299 Pages 588-589
    Published: December 05, 1959
    Released on J-STAGE: June 30, 2009
    DOIhttps://doi.org/10.2493/jjspe1933.25.299_588
    JOURNAL FREE ACCESS
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