Journal of the Japan Society of Precision Engineering
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Volume 23, Issue 270
Displaying 1-7 of 7 articles from this issue
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  • [title in Japanese]
    [in Japanese], [in Japanese], [in Japanese], [in Japanese], [in Japane ...
    1957 Volume 23 Issue 270 Pages 342-403
    Published: August 05, 1957
    Released on J-STAGE: June 30, 2009
    DOIhttps://doi.org/10.2493/jjspe1933.23.342
    JOURNAL FREE ACCESS
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  • Friction Process on Relief Face of Cutting Tool
    Makoto OKOSHI, Toshio SATA
    1957 Volume 23 Issue 270 Pages 404-408
    Published: August 05, 1957
    Released on J-STAGE: June 30, 2009
    DOIhttps://doi.org/10.2493/jjspe1933.23.404
    JOURNAL FREE ACCESS
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    Friction process on relief face of cutting tool was discussed comparing with that rake face of cutting tool. Two components of cutting force, shear angle and contact length on rake face with chip were measured when contact length between relief face and machined surface was varied. It was found that compressive stress on relief face was remarkably increased with increase in contact length on relief face, and that shear stress on relief face remained constant independently of contact length on relief face, feed of tool and relief angle. Further it was found that shear stress on relief face was about equal to that on rake face. From these results it is shown that friction process on relief face can be satisfactorily explained as metal-shearing process such as in that on rake face.
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  • Studies on the Dynamical Characteristics of Lathe
    T. INOUE
    1957 Volume 23 Issue 270 Pages 409-412
    Published: August 05, 1957
    Released on J-STAGE: June 30, 2009
    DOIhttps://doi.org/10.2493/jjspe1933.23.409
    JOURNAL FREE ACCESS
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    As a continuation of the previous research on lathes, we have studied the case similar to hat when the free end of the work was supported by a dead centre.
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  • Researches on Hot Machining (Part 2)
    The Influence of Temperature on Mechanical Properties of Work Material
    Makoto OKOSHI, Kisuke IIDA, Kazuo OZEKI
    1957 Volume 23 Issue 270 Pages 412-415
    Published: August 05, 1957
    Released on J-STAGE: February 16, 2010
    DOIhttps://doi.org/10.2493/jjspe1933.23.412
    JOURNAL FREE ACCESS
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    Mechanical strength of paraffin, used as work material for hot machining, is decreased by heating from 9.03×10-2 kg/mm2 at 11°C to 0.66×10-2 kg/mm2 at 40°C for shearing strength and from 23.5×10-2 kg/mm2 at 7 °C to 1.1×10-2 kg/mm2 at 40°C for compressive.
    The coefficients of friction between paraffin and tool material (H. S. S.) are changed from 0.41 to 0.25 by heating to 44°C from 9°C and have the minimum value at 25°C. In high temperature paraffin tends to be adhesive.
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  • [title in Japanese]
    [in Japanese]
    1957 Volume 23 Issue 270 Pages 415-420
    Published: August 05, 1957
    Released on J-STAGE: February 16, 2010
    DOIhttps://doi.org/10.2493/jjspe1933.23.415
    JOURNAL FREE ACCESS
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  • Study on High Speed Machining (No.14)
    On Machinability of Materials Cut
    Hidehiko TAKEYAMA
    1957 Volume 23 Issue 270 Pages 420-424
    Published: August 05, 1957
    Released on J-STAGE: June 30, 2009
    DOIhttps://doi.org/10.2493/jjspe1933.23.420
    JOURNAL FREE ACCESS
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    In the previous report, the fundamental machinability formula was presented both theoretically and experimentally based upon the theory of tool-chip contact area. The machining characteristics defined by cutting force, shear angle and chip-thickness-ratio could be clearly analysed by the formula. Consequently tool-chip contact area had been proved to be a basic factor of machining characteristics defined as above.
    It is a very interesting phenomenon that each material has its own machinability characteristic although the cutting conditions are the same. Machinability of materials also could be analysed through the same principle mentioned above, that is, the machining theory based upon tool-chip contact area. Here in this experiment, various materials such as aluminium, copper, brass, mild steel, alloy steel and Meehanite cast iron are machined under definite cutting conditions to investigate each tool-chip contact area and chip formation, of which results are compared with the individual material testing data. As a result, the slope of the shear test curve near the rupture point has been verified to be closely related with the tool-chip contact area in machining and cosequently with the machinability of the material.
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  • [title in Japanese]
    1957 Volume 23 Issue 270 Pages 426-428
    Published: August 05, 1957
    Released on J-STAGE: June 30, 2009
    DOIhttps://doi.org/10.2493/jjspe1933.23.426
    JOURNAL FREE ACCESS
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