Journal of the Japan Society of Precision Engineering
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Volume 23, Issue 268
Displaying 1-9 of 9 articles from this issue
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  • [title in Japanese]
    [in Japanese]
    1957 Volume 23 Issue 268 Pages 259-261
    Published: June 05, 1957
    Released on J-STAGE: June 30, 2009
    DOIhttps://doi.org/10.2493/jjspe1933.23.259
    JOURNAL FREE ACCESS
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    [in Japanese]
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  • Researches on Hot Machining (Part 1)
    The effects of Temperature on Cutting Mechanism
    Makoto OKOSHI, Kisuke IIDA, Kazuo OZEKI
    1957 Volume 23 Issue 268 Pages 262-265
    Published: June 05, 1957
    Released on J-STAGE: June 30, 2009
    DOIhttps://doi.org/10.2493/jjspe1933.23.262
    JOURNAL FREE ACCESS
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    The mechanism of orthogonal cutting at high temperature was analysed by the photographic method from the viewpoints of type of chip, cutting ratio, shear angle and shear strain.
    In order to avoid the wear and the chipping of cutting edge and the transformation of work material at high temperature, paraffin was used as work material.
    As the temperature of work piece increases, the type of chip tends to be a flow type.
    Cutting ratio, shear angle and shear strain were affected by the top rake angle of cutting tool.
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  • Impression of Vickers Hardiness
    Nobuyuld OHTA, Chikao YOKONO, Masahisa MOTO, Seigo SANO
    1957 Volume 23 Issue 268 Pages 265-269
    Published: June 05, 1957
    Released on J-STAGE: June 30, 2009
    DOIhttps://doi.org/10.2493/jjspe1933.23.265
    JOURNAL FREE ACCESS
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    We made an attempt to research on the pyramid surface of Vickers impression by means of interference microphotograph. As the result, the surface of the rolled pure Al is more convex than that of the annealed one. The height of a top in the convex surface is about 0.8μ for the rolled test piece under 30kg load, and 0.4μ for the annealed one under 20kg load. On the other hand, the surface of the test piece is swelled near the impression. Testing the surface by a surface tester, we know that the surface is more swelled at the position between the corners of the impression than at the corner.
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  • [title in Japanese]
    [in Japanese]
    1957 Volume 23 Issue 268 Pages 269-273
    Published: June 05, 1957
    Released on J-STAGE: June 30, 2009
    DOIhttps://doi.org/10.2493/jjspe1933.23.269
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  • The Cooling Effect of Cutting Fluid upon Chip (3)
    Akira YAMAMOTO
    1957 Volume 23 Issue 268 Pages 273-277
    Published: June 05, 1957
    Released on J-STAGE: February 16, 2010
    DOIhttps://doi.org/10.2493/jjspe1933.23.273
    JOURNAL FREE ACCESS
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    As a continuation of the last paper, the mean temperature rise θ at tool-chip interface was.analysed from chip side cooled by cutting fluid. Within the scope of conditions in usual metal cutting, θ is written approximately as follows :
    θ=θd [1-3/4An+1/4 (An) 2]
    where, symbols are same as in the last paper, and θd that is a mean temperature rise in dry cutting is 0.1155 ψt2 √n for n<100/3, and (n/200 + 1/3 -1.847/n) ψt2 for n>100/3. The cooling efficiency (1+θ/θd) increases as the value of (am/Vft22) √hθsK/ (1-δ) Q increases, and its maximum is only 30% at most in low speed and light cutting for a steel and water soluble oils. And the efficiency is 1 % at the cutting speed Vc 400, 80 and 40m/mn for the thickness of uncut chip t1 0.1, 0.3 and 0.5 mm. But, pouring by jet, this efficiency increases nearly double.
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  • Study on High Speed Machining (No.13)
    Analysis of Chip Curl in Two-Dimensional Machining of Flow Type (Part 2)
    Hidehiko TAKEYAMA
    1957 Volume 23 Issue 268 Pages 277-281
    Published: June 05, 1957
    Released on J-STAGE: February 16, 2010
    DOIhttps://doi.org/10.2493/jjspe1933.23.277
    JOURNAL FREE ACCESS
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    In the previous paper (Part 1), a new factor, that is, the shear strain conductivity, which is the motive force of chip curl was discussed theoretically based upon some assumptions. Here in Part 2, the experimental results have been presented to explain or insure the fundamental ideas mentioned in Part 1. Thus the shear strain conductivity has been proved to be almost constant regardless of the cutting conditions, as long as the material cut is constant. Also it has been demonstrated that the radius of chip curl can be determined by toolchip contact length, depth of cut in orthogonal cutting, rake angle, shear angle and shear strain conductivity.
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  • [title in Japanese]
    [in Japanese], [in Japanese]
    1957 Volume 23 Issue 268 Pages 282
    Published: June 05, 1957
    Released on J-STAGE: June 30, 2009
    DOIhttps://doi.org/10.2493/jjspe1933.23.282
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1957 Volume 23 Issue 268 Pages 283-285
    Published: June 05, 1957
    Released on J-STAGE: June 30, 2009
    DOIhttps://doi.org/10.2493/jjspe1933.23.283
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    1957 Volume 23 Issue 268 Pages 292-294
    Published: June 05, 1957
    Released on J-STAGE: June 30, 2009
    DOIhttps://doi.org/10.2493/jjspe1933.23.292
    JOURNAL FREE ACCESS
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