Journal of the Japan Society of Precision Engineering
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Volume 22, Issue 255
Displaying 1-8 of 8 articles from this issue
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  • [title in Japanese]
    [in Japanese]
    1956 Volume 22 Issue 255 Pages 205-208
    Published: May 05, 1956
    Released on J-STAGE: June 30, 2009
    DOIhttps://doi.org/10.2493/jjspe1933.22.205
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1956 Volume 22 Issue 255 Pages 209-212
    Published: May 05, 1956
    Released on J-STAGE: June 30, 2009
    DOIhttps://doi.org/10.2493/jjspe1933.22.209
    JOURNAL FREE ACCESS
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  • Dynamical Characteristic of a Lathe
    Tomoichi INOUE
    1956 Volume 22 Issue 255 Pages 213-216
    Published: May 05, 1956
    Released on J-STAGE: June 30, 2009
    DOIhttps://doi.org/10.2493/jjspe1933.22.213
    JOURNAL FREE ACCESS
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    The state of the motion of the work during turning was photographed with a special camera and the measurements were analysed.
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  • Studies on Cycloid Gears for Time Keeper
    Hiroo KAMAMOTO
    1956 Volume 22 Issue 255 Pages 216-220
    Published: May 05, 1956
    Released on J-STAGE: June 30, 2009
    DOIhttps://doi.org/10.2493/jjspe1933.22.216
    JOURNAL FREE ACCESS
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    It was our intention to clarify the relation of the gear ratio to the contact ratio of cycloid gear (fig. 2fig. 6) and specific sliding (Table. 1).
    Next the exact cycloid and corrected cycloid gears were compared with those of Norme De L'Industrie Horloger, and the results were plotted as shown in the figures, from which we can easily gain the contact ratio of cycloid gears.
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  • Modification of 30 feet Lathe into Roll Grinder (Second Paper)
    Taiji MASUDA
    1956 Volume 22 Issue 255 Pages 220-224
    Published: May 05, 1956
    Released on J-STAGE: June 30, 2009
    DOIhttps://doi.org/10.2493/jjspe1933.22.220
    JOURNAL FREE ACCESS
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    In the second paper, some remarkable results concerning the modification of the machine itself are described.
    Summary and Conclusions :
    1) To test the lathe for the accuracy concerning the bed surface and the carriage travel, a fine steel piano wire was stretched longitudinally above the bed under a certain amount of tension the deviation with regerd to the bed surface was observed with a micrometer microscope. Previously the wire was heated electrically under less tension to get rid of its initial distorsion to a great extent.
    2) The bed surface was scraped so as to get the readings within the limit of 0.05 mm (over 7.6 m length in the vertical plane).
    3) The readings of the carriage travel were within the limits of +15μ and -10μ (over 3 m length in the horizontal plane).
    4) A crowning mechanism which is simple and reliable was deviced.
    5) The error in the diameter of the rubber roll finished by this machine tool was within ± 0.03mm.
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  • Study on High Speed Machining
    Effect of Tool-Chip Contact Area (Part 2)
    Hidehiko TAKEYAMA
    1956 Volume 22 Issue 255 Pages 224-228
    Published: May 05, 1956
    Released on J-STAGE: February 16, 2010
    DOIhttps://doi.org/10.2493/jjspe1933.22.224
    JOURNAL FREE ACCESS
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    In the previous report the stresses on the rake face were analysed by a particular type of test that is to say an abstract machining test, which yielded two formulas for both frictional and normal stresses distributions on the rake face.
    Eased upon the principle obtained in the previous report, here a machining formula has been established theoretically, which has been proved experimentally to hold very well in practical machining. The advantages of this formula are as follows :
    (1) not having the term of coefficient of friction which was proved to be meaningless by the previous report
    (2) representing the controlling factor which has not been able to be clarified by the conventional machining formulas, that is, tool-chip contact area or stress concentration at the cutting edge
    (3) through tool-chip contact area, containing cutting speed effect on machining performance.
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  • Researches on Brass containing Pb (Part 11)
    Influences of Wear Mate
    Fusao HAYAMA
    1956 Volume 22 Issue 255 Pages 228-233
    Published: May 05, 1956
    Released on J-STAGE: February 16, 2010
    DOIhttps://doi.org/10.2493/jjspe1933.22.228
    JOURNAL FREE ACCESS
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    First, the influences of hardness of steel shaft on the wear of brass have been studied, and then wear phenomena in rubbing against a shaft made of same kind of brass have been observed.
    The wear manner of 60 : 40 brass and 70 : 30 brass containing pb is little influenced by the hardness of mate-steel. But, the wear of the 70 : 30 brass free from Pb, rubbed against annealed steel, is perfectly adhesive and the wear of that aginst hardened steel is oxidizing.
    In rubbing the blanks of same kind of brass each other, the wear grows easily adhesive, and its relationship to rubbing speed is similar to that of the adhesive wear between brass and steel.
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  • [title in Japanese]
    1956 Volume 22 Issue 255 Pages 237-240
    Published: May 05, 1956
    Released on J-STAGE: June 30, 2009
    DOIhttps://doi.org/10.2493/jjspe1933.22.237
    JOURNAL FREE ACCESS
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