Journal of the Japan Society of Precision Engineering
Print ISSN : 0374-3543
Volume 35, Issue 415
Displaying 1-12 of 12 articles from this issue
  • [in Japanese]
    1969 Volume 35 Issue 415 Pages 485-489
    Published: August 05, 1969
    Released on J-STAGE: June 30, 2009
    JOURNAL FREE ACCESS
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  • Kenjirô OKAMURA, Tomio MATSUBARA, Tateo AOYAGI
    1969 Volume 35 Issue 415 Pages 490-495
    Published: August 05, 1969
    Released on J-STAGE: June 30, 2009
    JOURNAL FREE ACCESS
    An analysis of the behavior of oil film thickness on a slideway is represented in this paper. A basic subject which should be made clear for a discussion of the behavior of oil film thickness by a load or velocity changing or for a discussion of a floating phenomenon of the slideway was studied.
    By considering metallic contact, the influence of viscosity of lubricant, surface roughness, slideway material, mean contact pressure, dimension of slideway, etc., on the behavior of oil film thickness are examined. Also, the specific correlation between these parameters and stick-slip vibration are discussed.
    The theoretical analysis is verified by the experiment. The result indicates that surface roughness and dimension of slideway are the most significant parameters for the behavior of oil film thickness of slideway.
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  • Beats of Fundamental Tone and its Overtone
    Takeshi YANAGISAWA
    1969 Volume 35 Issue 415 Pages 496-502
    Published: August 05, 1969
    Released on J-STAGE: June 30, 2009
    JOURNAL FREE ACCESS
    When two tones, whose frequencies are ω and nω +ε (n = 2, 3, 4, ……, ω>>| ε |), are sounded simultaneously, and the beats are heard, they are named false beats or high order beats. This paper explains this phenomenon mathematically. Judging from the ordinary beats phenomena, high order beats are defined as the envelopes of the combined oscillation (with their frequencies ω and nω+ε), and also as those whose period is determined by ε. Then this paper shows,
    (1) high order beats is expressed generally by the following equations;
    ye= sin ωt + sin (nω+ ε) t
    ye/∂ω=0 (ω : parameter)
    and the period of those envelopes is certainly determined by ε, and the value of ye are able to be calculated.
    (2) graphically the high order beats are obtained and it is proved that the period is exactly 2π/ε.
    (3) the period of the same maximum value of ye (which is equal to the period of the high order beats) is analytically 2π/ε, independent of n.
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  • Shin-ichi KAWADA
    1969 Volume 35 Issue 415 Pages 503-508
    Published: August 05, 1969
    Released on J-STAGE: February 16, 2010
    JOURNAL FREE ACCESS
    The term “integrator” means a device which applies around the gyro's horizontal axis certain torque proportional to time integral of angle between the gyro spin axis and a horizontal plane. The author invented an integrator which has simple construction and high accuracy, and which is suitable for use with Sperry type gyrocompasses, This report, after describing the construction and the action of this integrator, discusses north-seeking movement of a gyrocompass with the integrator, when the equipment is installed on the ship moving along a fixed course on the earth at a constant speed. The results obtained theoretically and experimentally are as follows; a constant torque around the horizontal axis does not cause fixed error if the integrator is attached to the gyrocompass, the gyrocompass is free from latitude error, and the spin axis settles horizontally regardless of latitude. It is demonstrated that the use of this integrator greatly minimizes the fixed error in gyrocompass.
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  • Study of Production System (1st Report)
    Kenjiro OKAMURA, Hajime YAMASHINA
    1969 Volume 35 Issue 415 Pages 509-516
    Published: August 05, 1969
    Released on J-STAGE: February 16, 2010
    JOURNAL FREE ACCESS
    The paper deals with the sequencing problem as an initial step to study of production system. Sequence may be classified roughly into linear sequence and compound sequence. This report describes the systematical method for establishing linear sequences.
    The points to analyze this problem are as follows;
    (1) The representative method of precedence relations.
    (2) The systematical method of establishing linear sequences.
    (3) The total number of feasible linear sequences.
    For these purposes, the fundamental matrix which makes precedence diagram into the form available to theoretical analysis, sequential product as the operetional method by which precedence relations can be handled rationally, and then the linear product by which all of the feasible sequences can be established without overlapping, have been introduced. In the final analysis, sequences are established easily, systematically and very mechanically by linear product.
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  • Study on Generation of Iridescent Surface II
    Akio KAMOGAWA, Hiroyoshi SAITO, Toshio SATA
    1969 Volume 35 Issue 415 Pages 517-521
    Published: August 05, 1969
    Released on J-STAGE: June 30, 2009
    JOURNAL FREE ACCESS
    The present paper describes some experimental verifications of the diffraction theory on iridescence from the machined surface which was reported in the previous paper. The brass disks are machined under various cutting conditions, that is, by two kinds of lathe, by four cutting tools of different material and with different tool feeds. Surface profiles are mesured by a surface roughness meter and photographic recordings of diffracted spectra are obtained by an optical diffractometer for each surface. The effects of cutting condition are investigated to find the best condition for making clear iridescent surface.
    The surface should have the roughness curve which consists of exactly periodic feed marks. Pitch error of feed and waviness of the surface cause a decrease of saturation of iridescent color. The use of a diamond lathe i.e., a fine turning lathe with precision sliding bearing, is the most preferable for the purpose.
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  • In the Case of Using Two Parallel Shafts
    Kumao KON
    1969 Volume 35 Issue 415 Pages 522-527
    Published: August 05, 1969
    Released on J-STAGE: June 30, 2009
    JOURNAL FREE ACCESS
    The last report with the same title treated the crossed helical gear type shaving method.
    This report refers to the equipment (for shaving elliptic gears). Which has two parallel shafts, they are for a gear blank and a shaving cutter.
    Compared with the method of using crossed helical gears, the method of using the above-mentioned equipment is simpler in its structure and easier in operating it.
    An elliptic gear was successfully made after frequent trials by using the above-mentioned instrument. The gear is mede of aluminium and the module is 2, the number of teeth is 57, the major axis is 118 m.m., and the minor axis is 110 m.m.
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  • Theoretical Analysis of Dynamical Behavior of Work
    Junichiro KUMABE, Kazutsugu YASUDA, Osamu TANIGUCHI
    1969 Volume 35 Issue 415 Pages 528-535
    Published: August 05, 1969
    Released on J-STAGE: June 30, 2009
    JOURNAL FREE ACCESS
    In this paper the horizontal displacement of work in vibrating cutting (frequency 100 Hz, amplitude 0.20 mm, cutting speed 0.36m/min is analyzed theoretically and experimentally. The main results are as follows :
    1) The horizontal displacement of work can be expressed theoretically and this theoretical results has been confirmed in good argument with the experimental result.
    2) And it was found that the factors influence the dynamical displacement of work are as follows : thrust force Pt, spring constant k, cutting time in one cycle of tool tc, circular frequency of tool ω, natural circular frequency of work ωn, period of tool T, ν=C/Cc C : damping constant of work Cc : critical damping constant of work.
    3) From both of theoretical and experimental results, it has been verified that the tool cuts the work only near the neutral work position in each cycle of tool vibration in stable vibrating cutting.
    4) Under such a cutting condition, the principal cutting force is larger than the thrust force down to the depth of cut than 5 μ and the machined surface roughness is less than 0.4 μ and and the roundness is less than 2 μ.
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  • 1969 Volume 35 Issue 415 Pages 535a
    Published: 1969
    Released on J-STAGE: November 19, 2010
    JOURNAL FREE ACCESS
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  • 1969 Volume 35 Issue 415 Pages 535b
    Published: 1969
    Released on J-STAGE: November 19, 2010
    JOURNAL FREE ACCESS
    Download PDF (89K)
  • [in Japanese], [in Japanese]
    1969 Volume 35 Issue 415 Pages 536-539
    Published: August 05, 1969
    Released on J-STAGE: June 30, 2009
    JOURNAL FREE ACCESS
    Download PDF (709K)
  • [in Japanese]
    1969 Volume 35 Issue 415 Pages 540-546
    Published: August 05, 1969
    Released on J-STAGE: June 30, 2009
    JOURNAL FREE ACCESS
    Download PDF (1088K)
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