Journal of the Japan Society of Precision Engineering
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Volume 28, Issue 324
Displaying 1-8 of 8 articles from this issue
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  • [title in Japanese]
    [in Japanese]
    1962 Volume 28 Issue 324 Pages 4-11
    Published: January 05, 1962
    Released on J-STAGE: June 30, 2009
    DOIhttps://doi.org/10.2493/jjspe1933.28.4
    JOURNAL FREE ACCESS
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    [in Japanese]
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  • Correlation between Metal Wear and Friction under Boundary Lubrication
    Makio MIZUNO
    1962 Volume 28 Issue 324 Pages 12-17
    Published: January 05, 1962
    Released on J-STAGE: June 30, 2009
    DOIhttps://doi.org/10.2493/jjspe1933.28.12
    JOURNAL FREE ACCESS
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    In this paper, wear mechanism of soft metals rubbed on hard metal is discussed with the consideration of the adhesive term in frictional force of unlubricated component and the effect of surface roughness. In boundary lubrication and unlubrication, metal wear is expressed as follows
    Ws*=W/FdH = kH/1+kH β/τ
    Where W; Metal wear (mm3), Fd ; Frictional force of Unlubricated component (kg), L; Rubbing distance (mm), H; Maximum height of surface roughness (μ), τ; Shear strength of soft metals (kg/mm2), k, β; Constant value respectively.
    Wear tests on such soft metals as zinc, cadmium and lead are carried out on the virgin surface of carbon steel plate, varying load and surface roughness of steel plate. The results showed good agreement with the above expression for metal wear.
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  • Study on the Electrolytic Process of Nozzling Micro-holes in Metals. (2nd. Report)
    Experimental Study on the Electrolytic Nozzling Micro-holes in Nickel
    Akira NANNICHI
    1962 Volume 28 Issue 324 Pages 18-23
    Published: January 05, 1962
    Released on J-STAGE: June 30, 2009
    DOIhttps://doi.org/10.2493/jjspe1933.28.18
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    The author used an electro-nozzle to make micro-holes in metals in place of a drilling machineo,
    In previous report he studied the characteristics of electro-nozzle using copper. In this report he developed his view based on the results of his experiments with nickel.
    These experiments using orthophosphoric acid solution showed that the difference in characteristic curves of the speed at which cell voltage is raised is rather negligible below the specific point C. Then it is found that the curve is almost always fixed in all electrolytic conditions mentioned above, the differing conditions of dissociation according to the degrees of concentration of this solution are represented by the shifting of the curves and futher, at fixed value of cell voltage, valuation of current through the cell is regarded as fluctuation about the reference value below the specific point C.
    Finally a formula was derived from both to the electrolytic conditions of electro-nozzle and its formative function, by which he showed the possibility of analysis of the working power of the nozzle.
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  • Machinability of Cast Iron
    Keiji OKUBHIMA, Kazuaki IWATA, Itsuro NAKATOMI
    1962 Volume 28 Issue 324 Pages 24-30
    Published: January 05, 1962
    Released on J-STAGE: June 30, 2009
    DOIhttps://doi.org/10.2493/jjspe1933.28.24
    JOURNAL FREE ACCESS
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    Machinability of cast iron was investigated from the viewpoint of chip formation, tool life, and surface finish.
    Cutting mechanism of cast iron was analysed based upon the flow region concept. The effects of depth of cut and rake angle on the cutting process were discussed.
    The most suitable tool material for cutting cast iron was selected and effects of cutting conditions on tool life were investigated over a wide range.
    Machinability based upon surface finish was discussed in connection with tool wear.
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  • Studies on Ultrasonic Machining
    The Influence of the Workpiece Thickness upon the Machining Speed
    Yoshinobu TANAKA, Akishige YANO
    1962 Volume 28 Issue 324 Pages 31-36
    Published: January 05, 1962
    Released on J-STAGE: February 16, 2010
    DOIhttps://doi.org/10.2493/jjspe1933.28.31
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    In this report, the influence of the workpiece thickness upon the machining speed in ultrasonic machining was studied experimentally by measuring vibratory displacement of tool, machining speed, impulsive force and theoretically by using the theory of reflection and transmission of ultrasonic wave through a different solid medium. In consequence following results were obtained.
    (1) When the workpiece thickness is large, machining speed decreases and becomes minimum when the thickness is equal to λ/4 (λ : wave length in the workpiece).
    (2) It seems that the decrease in machining speed is due to the decrease in impulsive force.
    (3) The rates of the decrease in machining speed and impulsive force are approximate to those of the theory of reflection and transmission of ultrasonic wave through a different solid medium.
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  • [title in Japanese]
    [in Japanese]
    1962 Volume 28 Issue 324 Pages 37-42
    Published: January 05, 1962
    Released on J-STAGE: June 30, 2009
    DOIhttps://doi.org/10.2493/jjspe1933.28.37
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese], [in Japanese]
    1962 Volume 28 Issue 324 Pages 43-46
    Published: January 05, 1962
    Released on J-STAGE: June 30, 2009
    DOIhttps://doi.org/10.2493/jjspe1933.28.43
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    1962 Volume 28 Issue 324 Pages 51-54
    Published: January 05, 1962
    Released on J-STAGE: June 30, 2009
    DOIhttps://doi.org/10.2493/jjspe1933.28.51
    JOURNAL FREE ACCESS
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