Journal of the Japan Society of Precision Engineering
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Volume 42, Issue 493
Displaying 1-12 of 12 articles from this issue
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  • [title in Japanese]
    [in Japanese], [in Japanese]
    1976 Volume 42 Issue 493 Pages 68-73
    Published: February 05, 1976
    Released on J-STAGE: June 30, 2009
    DOIhttps://doi.org/10.2493/jjspe1933.42.68
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1976 Volume 42 Issue 493 Pages 74-80
    Published: February 05, 1976
    Released on J-STAGE: June 30, 2009
    DOIhttps://doi.org/10.2493/jjspe1933.42.74
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1976 Volume 42 Issue 493 Pages 81-87
    Published: February 05, 1976
    Released on J-STAGE: June 30, 2009
    DOIhttps://doi.org/10.2493/jjspe1933.42.81
    JOURNAL FREE ACCESS
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  • Recognition of the Cutting State by the Pattern Recognition Technique
    Katsumori MATSUSHIMA, Eiichi KONO, Toshio SATA
    1976 Volume 42 Issue 493 Pages 88-93
    Published: February 05, 1976
    Released on J-STAGE: June 30, 2009
    DOIhttps://doi.org/10.2493/jjspe1933.42.88
    JOURNAL FREE ACCESS
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    In this study the automatic recognition of the cutting states is attempted by the pattern recognition technique. It is found that the power spectrum of cutting force has its own special pattern depending on the cutting situations such as breakage of chip, formation of built-up edge and generation of chattering. Linear discriminant function for the recognition of the cutting situations is obtained by the learning process. The pattern vectors used for learning or for recognition have six components consisting of the cutting conditions given and the features extracted for the power spectrum. In spite of a small number of the training vectors for the learning process, the recognition of the cutting situations gives satisfactory results with the rate of success of at least higher than 82%. The method proposed in the paper can be applied to the on-line control of the cutting process.
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  • [title in Japanese]
    [in Japanese], [in Japanese]
    1976 Volume 42 Issue 493 Pages 94-99
    Published: February 05, 1976
    Released on J-STAGE: February 16, 2010
    DOIhttps://doi.org/10.2493/jjspe1933.42.94
    JOURNAL FREE ACCESS
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    [in Japanese]
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  • Erratum to : Control on Varying Heat Source
    1976 Volume 42 Issue 493 Pages 99
    Published: 1976
    Released on J-STAGE: June 30, 2009
    DOIhttps://doi.org/10.2493/jjspe1933.42.493_99
    JOURNAL FREE ACCESS
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  • Experimental Errors in Tool Life Test
    Ryoji MURATA
    1976 Volume 42 Issue 493 Pages 100-105
    Published: February 05, 1976
    Released on J-STAGE: June 30, 2009
    DOIhttps://doi.org/10.2493/jjspe1933.42.100
    JOURNAL FREE ACCESS
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    The present paper is devoted primarily to clarify problems on the variation in tool life or wear due to experimental errors in turning test. The effects of fluctuation of cutting condition in the test and measuring error in tool wear measurement are discussed. Furthermore, some investigations on the effect of characteristics of machine tool used by utilizing very strictly quality-controlled work material and tool tips are made. Discussion on the truly essential variation of tool wear from which spurious variations have been extracted is presented.
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  • [title in Japanese]
    [in Japanese], [in Japanese], [in Japanese]
    1976 Volume 42 Issue 493 Pages 106-112
    Published: February 05, 1976
    Released on J-STAGE: June 30, 2009
    DOIhttps://doi.org/10.2493/jjspe1933.42.106
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  • On the Cutting Performance and Metallurgical Properties of Carbide Tools
    In Case of the Turning and Face-milling of Carbon Steels
    Kitao OKUSA, Ryozo KITAGAWA, Eiji YAMAMOTO
    1976 Volume 42 Issue 493 Pages 113-119
    Published: February 05, 1976
    Released on J-STAGE: June 30, 2009
    DOIhttps://doi.org/10.2493/jjspe1933.42.113
    JOURNAL FREE ACCESS
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    The metallurgical properties such as the hardness, toughness and grain size of carbide tools P 10, 30 and 25 are measured, and the relations between these properties and the cutting performance in turning and face-milling of carbon steels are examined. The results obtained are as follows. Although the carbide grades of high hardness are inferior to toughness and the resistance to early fracture, they are superior to the resistance to wearing and cracking in machining. The grain size of carbide grades is related with the wear resistance of the tools, and the carbide grades having coarse grains show the favourable performance in turning. In face-milling, the carbide grades having coarse grains and low hardness simultaneously show the poor performance and the moderate combination of the hardness and grain size exists in P 25. Furthermore in face-milling, the high grade such as P 10 has good wear resistance, but its range of cutting speed where the normal wear type appears is narrower than P 30 because of its poor toughness.
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  • [title in Japanese]
    [in Japanese]
    1976 Volume 42 Issue 493 Pages 120-132
    Published: February 05, 1976
    Released on J-STAGE: June 30, 2009
    DOIhttps://doi.org/10.2493/jjspe1933.42.120
    JOURNAL FREE ACCESS
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  • Observations on Produced Chip in Cutting Process by a Grit
    Investigation into Metal Removing Mechanism by Abrasive Grit (1st Report)
    Yoshihiro KITA, Mamoru IDO, Shigeki HATA
    1976 Volume 42 Issue 493 Pages 135-140
    Published: February 05, 1976
    Released on J-STAGE: June 30, 2009
    DOIhttps://doi.org/10.2493/jjspe1933.42.135
    JOURNAL FREE ACCESS
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    Metal removal mechanism by abrasive grit haven't investigated so much. But it is very important problem in grinding mechanism. In order to clear the action of abrasive grit which produce chips, we must get authentic informations about it. Then, a quick-stop technique has been developed to freeze the chip forming process effectively in nominal grinding speed. And the optical micrograph of longitudinal cross-section in the center of the groove has been got and observed in details. This paper concerns with an investigation into the chips produced in front of the rake surface of edge. The relations between the shape of chip and cutting condition have been discussed and as results followings were clarified:
    (1) The chips formed by the edges having apex angle of 100°-140° are consist of short segment with shear deformation. But the free ends of chips change depending on the apex angle of edges.
    (2) The chips are strongly compressed during the removing process between the material and the front surface of edge, and the free ends of chips shall get round in the case of large apex angle.
    (3) The number of cracks in the free end of chip shall increase when the oil is put on the work surface, and the change of chip-type is observed for small apex angle of cutting edge.
    (4) The increase of cutting speed makes the term of removing material as a chip short and makes the size of chip small accordingly.
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  • [title in Japanese]
    [in Japanese], [in Japanese]
    1976 Volume 42 Issue 493 Pages 141-146
    Published: February 05, 1976
    Released on J-STAGE: June 30, 2009
    DOIhttps://doi.org/10.2493/jjspe1933.42.141
    JOURNAL FREE ACCESS
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