Journal of the Japan Society of Precision Engineering
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Volume 28, Issue 325
Displaying 1-7 of 7 articles from this issue
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  • [title in Japanese]
    [in Japanese]
    1962 Volume 28 Issue 325 Pages 61-72
    Published: February 05, 1962
    Released on J-STAGE: June 30, 2009
    DOIhttps://doi.org/10.2493/jjspe1933.28.61
    JOURNAL FREE ACCESS
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  • The Ratio of Feed to Depth of Cut in Metal Cutting
    In the Case of Straight Edges and 90 deg. Nose Angle
    Takashi SUGAWARA
    1962 Volume 28 Issue 325 Pages 73-78
    Published: February 05, 1962
    Released on J-STAGE: June 30, 2009
    DOIhttps://doi.org/10.2493/jjspe1933.28.73
    JOURNAL FREE ACCESS
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    When a metal is cut simultaniously by end and side cutting edges of a tool with the back rake angle i and side rake angle λ, the chip flows to a definite direction determined not only by the rake angles, but also by the ratio of feed to depth of cut.
    The optimum chip-flow direction of minimum energy can be controlled by choosing the ratio of feed to depth of cut reasonably.
    An equation of the reasonable ratio of feed to depth of cut was introduced, assuming that the chip-flow direction is affected by the volume of chips from each cutting edge, and it was compared with the experimental results by the tools having the back rake angles and side rake angles, 30°, 30°; 20°, 20° ; 30°, 20° ; 30°, 0°, respectively.
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  • Studies on Flat Superfinishing (Part 9)
    On Superfinishing of Soft Metals
    Seiki MATSUI
    1962 Volume 28 Issue 325 Pages 79-83
    Published: February 05, 1962
    Released on J-STAGE: June 30, 2009
    DOIhttps://doi.org/10.2493/jjspe1933.28.79
    JOURNAL FREE ACCESS
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    The process of brass superfinishing by special silicate bond wheels was investigated experimentally. In this experiment, the stock removal, the superfinishing resistance, the surface roughness and the surface flatness were measured. Further, brass was superfinished by vitrified bond wheels and PVA wheels. Consequently, it was found that special silicate bond wheels were more suitable for superfinishing of brass than Vit wheels.
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  • Study on the Electrolytic Process of Nozzling Micro-holes (3 rd. Report)
    Experimental Study on the Electrolytic Nozzling Micro-holes in Molybdenum
    Akira NANNICHI
    1962 Volume 28 Issue 325 Pages 84-90
    Published: February 05, 1962
    Released on J-STAGE: June 30, 2009
    DOIhttps://doi.org/10.2493/jjspe1933.28.84
    JOURNAL FREE ACCESS
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    In succession to what was given in the previous reports I and II the author continued his fundamental experiments and added some explanations as to the following points.
    (1) Characteristics of electro-nozzling:
    (i) With molybdenum plate, it is thought to be, as given in the 2nd report, owing to the state of dissociation of electro-solution that a nearly 50 % solution of orthophosphoric acid caused the specific point C to give maximum value of comparatively stable total current.
    (ii) This maximum value suggests the critical value of the shape and size of a given nozzle and the relation there is between it and the inside diameter of the nozzle at its nose. This will be practically available for the decision of working condition.
    (2) Working power of electro-nozzle:
    (i) The author expressed his opinion about the shape and size of a hole to be worked with electro-nozzle in detail and then gave formulae concerning weight to be worked and its rate and the definition of the working velocity.
    (ii) He showed the result of experimental investigations under various electrolytic conditions and examined quantitative factors of working power of electro-nozzle.
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  • Cutting performances of heat-treated and surface-treated high-speed-steel tools
    Keiji OKUSHIMA, Yutaka SOGAMI, Mitsuo HATTORI, Kazuaki IWATA
    1962 Volume 28 Issue 325 Pages 91-99
    Published: February 05, 1962
    Released on J-STAGE: June 30, 2009
    DOIhttps://doi.org/10.2493/jjspe1933.28.91
    JOURNAL FREE ACCESS
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    The cutting performances of high-speed-steel tool materials are subjected to various treatments such as austemper, nitronized-treatment after austemper, subzero-treatment after austemper, and banite hardening.
    Hardness of high-speed-steel materials at high temperatures is measured and the behaviors of tool failure are discussed.
    It is found out that heat-treatments and surface-treatments of tool materials are effective in improving the cutting performances, and the extent of the effect depends upon the grades of tool materials.
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  • [title in Japanese]
    [in Japanese]
    1962 Volume 28 Issue 325 Pages 100-104
    Published: February 05, 1962
    Released on J-STAGE: June 30, 2009
    DOIhttps://doi.org/10.2493/jjspe1933.28.100
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    1962 Volume 28 Issue 325 Pages 105-108
    Published: February 05, 1962
    Released on J-STAGE: June 30, 2009
    DOIhttps://doi.org/10.2493/jjspe1933.28.105
    JOURNAL FREE ACCESS
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