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Volume 22, Issue 252
Displaying 1-9 of 9 articles from this issue
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[in Japanese]1956 Volume 22 Issue 252 Pages 45-49
Published: February 05, 1956
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSDownload PDF (776K) -
N. SHINOZAKI, K. WATANABE1956 Volume 22 Issue 252 Pages 50-53
Published: February 05, 1956
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSOn cutting the inner and outer surfaces of Super-Duralmin pipe, larger strain may be found in the pipe material if the material is aged, while in case that the material is in the course of aging, there may be less strain. Moreover, the shorter the time after heat-treatment, the lesser the strain. It seems that this phenomenon is not due to the i nfluence of internal stress caused by rapid cooling but that of internal stress caused by the change of the lattice constant of the raw materials and the unstable exudation which occur in several hours after heat-treatment.View full abstractDownload PDF (610K) -
Toshinori KURODA, Haruki KONDO1956 Volume 22 Issue 252 Pages 54-56
Published: February 05, 1956
Released on J-STAGE: February 16, 2010
JOURNAL FREE ACCESSAs a contribution to the theory of electropolishing, we have studied the deformation of microprofile of the copper plate by the indenter of Vickers Hardness Tester. The multiple-beam interferometry is applied for the investigation of microprofile. The results show that the Edwards' diffusion theory is more convenient than the Saito's oxide film theory.View full abstractDownload PDF (2329K) -
-The Vibration Measurement of the Base-Taiji MASUDA, Sigeyasu AJIOKA, Fuyuhiko KISHINOUYE1956 Volume 22 Issue 252 Pages 57-60
Published: February 05, 1956
Released on J-STAGE: February 16, 2010
JOURNAL FREE ACCESSA work shop is situated so near by railways that the vibrations of the ground become large and tangible considerablly everytime trains run on them.
It was a big problem how the vibrations affected the lathe which we were going to modify to a roll grinder. Here in the first report, we describe the results measured with a tromomenter, a vibrograph deviced by one of the writers, F. Kishinouye.
Summary:
(1) Although the vibrations were severely felt, the acceleration on the base due to them was only a tenth or hundredth as much as that in common work shops. (directions: X, Y, Z Fig. 2)
(2) It is desirable to increase the contact area between sliding parts of the machine and to make the natural frequency of the system large enough in order to let all parts vibrate together with the base.
(3) The operator of the machine tool must keep in mind not to touch the machine tool while working lest he shonld disturb the condition of vibrations.
(4) With a gap around the base (Fig. 4), the maximum acceleration due to vibrations was reduced to about a half.
(5) Because of the weakness of the ground, the vertical vibrations are hardly apparent when trains are running on railways far from there.Namely, comparatively large damping action of the groumd makes the vibration effective only when trains pass by the workshop.View full abstractDownload PDF (522K) -
Tsuneo NAKAMURA, Hisashi WADA1956 Volume 22 Issue 252 Pages 60-64
Published: February 05, 1956
Released on J-STAGE: February 16, 2010
JOURNAL FREE ACCESSVarious methods of high magnification light-cut are discussed, in particular as to the range of applications. The experiments were mainly carried out on the Single Tube Type, and it has been found that the image is influenced by the position of the reflective mirror and the profile magnification is affected by the inclination of the reflective mirror and the specimen.View full abstractDownload PDF (2625K) -
Chikara SHIMO1956 Volume 22 Issue 252 Pages 64-67
Published: February 05, 1956
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSIn this experiment fine flat drills of 0.65mm dia. were ground not by hands, but by a special grinding machine. This method is suited rather for the use in the laboratory than in shops. We have tested the drilling of the lower plates of 2.50mm in thickness with the same methord of weight pressure in feed as in the 1st report. As a result of this, we have found that the most suitable cutting edge angle is about 94°, and the longitudinal taper clearance is about 1°, but the drilling time in case of 30° lip clearance is shorter than in case of 20°. The constant revolution was 5000r. p. m.View full abstractDownload PDF (661K) -
Masahisa MATSUNAGA, Yoshiaki HAGIUDA, Noboru SUZUKI1956 Volume 22 Issue 252 Pages 67-70
Published: February 05, 1956
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSElectron micro-structure of the electro-deposited chromium is discussed. The structure of the bright deposits gives very fine crystals of the order of 10-6cm, whereas Hume-Rothery's results by X-ray diffraction method gave the order of 10-7cm. The crystal size of milky or matted surface is larger.
The crystal structure of chromium deposited from the bath c is hexagonal compact or bodycentred cubic, but their structure changes to a (110) orientation (b. c. c.) after half an hour's electro-deposition.View full abstractDownload PDF (5933K) -
[in Japanese]1956 Volume 22 Issue 252 Pages 71-76
Published: February 05, 1956
Released on J-STAGE: February 15, 2010
JOURNAL FREE ACCESSDownload PDF (994K) -
1956 Volume 22 Issue 252 Pages 80-82
Published: February 05, 1956
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSDownload PDF (617K)
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