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Volume 35, Issue 412
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[in Japanese]1969 Volume 35 Issue 412 Pages 267-273
Published: May 05, 1969
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSDownload PDF (1325K) -
Teiji MIURA1969 Volume 35 Issue 412 Pages 274-279
Published: May 05, 1969
Released on J-STAGE: February 16, 2010
JOURNAL FREE ACCESSIn inspecting the maximum peak to valley height Hmax, which is the vertical distance between the elevation of the highest peak and that of the lowest valley, from a roughness curve, according to JIS B0601, the extremely high peak or low valley, within a certain roughness width, is to be eliminated.
But whether the peak or valley should be eliminated or not, has been required the personal factor, for there has been no trustable standard for the case.
In this report, therefore, twist drill machined surfaces have been prepared to be inspected statistically. Ratios involving extreme values have been applied to eliminate the extremely high or low valley.
At the first step, roughness and waviness have been separated from profile curves. And at the second step, extremely high peak or low valley has been eliminated statistically. And inspected values, Hmax, Hrms and H3 have been compared to the machined conditions.View full abstractDownload PDF (970K) -
Study on Abrasive Wear (2nd Report)Shinichi MIYAZAWA, Hidehiko TAKEYAMA1969 Volume 35 Issue 412 Pages 280-284
Published: May 05, 1969
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSMost of convetional wear testing machines are lacking in thorough consideration or investigation of their dynamic characteristics, this sometimes resulting into misleading results. The newly developed testing machine is characterized by higher fidelity in a wide range of frequency up to approximately 500 cps by applying the dead load via an air mat and reducing the mass to generate an undesirable inertia force as far as possible. Another characteristic feature is to enable on-line measurements of friction force and wear amount, by means of electronics.View full abstractDownload PDF (1040K) -
Hideo TSUWA, Mitsuru HIDA, Yuuichi NAKAMURA1969 Volume 35 Issue 412 Pages 285-291
Published: May 05, 1969
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSMirror finished surface of Si single crystal have been made chiefly by mechanical method needing long working time. Electro-chemical method have been used as final process to remove deformed layers of finished surfaces. To improve the efficiency in mirror finishing of Si single crystals, we lapped them mechanically in addition to electorolytic method under the various working conditions.
The results are as follows : (1) Working time takes very shorter than that by mechanical method. Surface roughness is about 0.08 μ (Hmax). In this experiment, grain size has little influence on surface roughness. Deformed layers are almost not existing. (2) Stock removal rates accord with theoretical values calculated from electric currents. (3) By electrolytic mirror lapping, smoothing action takes place over the critical current density. (4) The roughness of mirror finished surface by the electrolytic mirror lapping is almost similar with that by electrolytic polishing surface. (5) The mechanism of this lapping is due to solution of Si material by electrolytic action. Although stock removal by abrasive grains are little, mechanical cutting actions promote local electrolytic dissolving action, then the surface flatness is better than that by electrolytic polishing.View full abstractDownload PDF (2211K) -
Toshio YUTA1969 Volume 35 Issue 412 Pages 292-298
Published: May 05, 1969
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSIn the beginning of cutting with abrasives or cutting tools, a phenomenon in which no chips are formed because the tool-edge is rubbed appears.
In order to grasp the essentials of this phenomenon an experiment was carried out on the low speed orthogonal-cutting with a gradual increasing depth of cut using carbon steel and silicon steel as specimens, the observations were carried out on the cutting surface and the microplastic region by detecting dislocation etch pit of silicon steel.
The experimental data shows that on the state of contact between tool and workpiece, in the rubbing region the tool-edge comes in contact with the surface roughness of workpiece, in the ploughing region the tool-edge comes fully in contact with the surface and in the cutting region it perfectly contacts with the bulk. On the observation of dislocation etch of pit silicon steel, it is recognized to occur dislocation by microyielding even in the rubbing region. The slip system in the rubbing latter period does not differ essentially from it in the ploughing region, it is the common slip system of silicon steel {110} <111>, but in the cutting region other slip system {112} <111> is observed.View full abstractDownload PDF (1980K) -
Motion of a Particle on a Vibratory ConveyorSakiichi OKABE, Yasuo YOKOYAMA, Yasuo JIMBO1969 Volume 35 Issue 412 Pages 299-306
Published: May 05, 1969
Released on J-STAGE: February 16, 2010
JOURNAL FREE ACCESSA study is made of the motion of a particle on a vibratory conveyor. When a particle is conveyed without jumping on a vibrating surface, the type of motion is classified into seven modes. The classification of these modes is determined by two dimensionless quantities Qα and Qb. They areQα=αw2sin (γ+ρ) /gsin (θ+ρ)
Qb=αw2sin (γ-ρ) /gsin (θ-ρ)
in which
αzw2 : acceleration of the vibrating surface,
ρ : friction angle between the vibrating surface and the particle,
θ : inclination of the surface,
γ : direction of linear vibration of the surface.
In mode I, |Qα| ≤1 and |Qb| ≤1, there is no relative slip between the particle and the vibrating surface. In mode, II, |Qα|> 1 and |Qb|≤ 1, the particle slides forward relatively and intermittently, and in mode III, |Qα|≤ 1 and |Qb|> 1, it slides backward also relatively and intermittently. In mode IV, |Qα|> 1 and |Qb| > 1, the particle slides forwared and backward alternately during one period of vibration. Mode IV is divided, moreover, into four modes according to the relation between Qα and Qb.
A diagram with Qα to Qb plotted on a rectangular coordinate clarifies the regions of modes, and it is also useful to calculate the conveying velocity, which will be discussed in subsequent reports.
It is confirmed that the above theoretical results agree well with experimental studies.View full abstractDownload PDF (1410K) -
Kozo IIZUKA, Mitsuo GOTO, Hidetaka IMAI1969 Volume 35 Issue 412 Pages 307-313
Published: May 05, 1969
Released on J-STAGE: February 16, 2010
JOURNAL FREE ACCESSAn application of transmitted-type microinterferometry on the form measurement of small spherical parts is investigated.
Replicas of the spherical parts to be measured, made of methyl-and ethyl-metaacrylate on a plane mirror, are immersed in oil and observed on an interference microscope with a low magnification. By using proper oil, Newton's rings can be observed over required area on the spherical part irrespective of surface finish.
By measuring the radii of curvature of five steel balls and their repricas with microscopic collimation method (Guild's mirror method), it is confirmed that the replicas have satisfactory reproducibility and stability.
The equation of a sphere representing the form of each specimen is derived by measuring the positions of interference fringes and by applying Deming's method of least squares and mean radius of curvature and form errors are evaluated.
As an example of practical application, the tip forms of the standard hammers for Shore hardness test are measured by this method. The result is compared with the measurement by microscopic collimation and it is revealed that the radius of about 1 mm can be measured with the precision of about 3 μm in standard deviation if the specimen has a good sphericity.View full abstractDownload PDF (1615K) -
Shoichi SEINO1969 Volume 35 Issue 412 Pages 314-319
Published: May 05, 1969
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSAn analysis is given of a systematic error in the measurement of standard scales, the positional shift of graduation line images produced by the micrometer-microscope, which is caused by the imperfect adjustment of the illuminating system of the microscope. Many experiments show that the amount of the shift is nearly proportional to the incident angle of illuminating light to the graduated surface within a range of 3°. This paper point out two causes of the shift. The one is imperfect focusing of the graduation line image which is analyzed theoretically. The other is related to the micro-geometrical form of the line groove and it is found that the aspect of the shift is very complicated. However, the line on metal surface, ruled with a diamond tool has larger shift than that of the line on glass surface coated by a thin metallic film.View full abstractDownload PDF (1470K) -
[in Japanese]1969 Volume 35 Issue 412 Pages 320-327
Published: May 05, 1969
Released on J-STAGE: February 16, 2010
JOURNAL FREE ACCESSDownload PDF (1627K) -
[in Japanese]1969 Volume 35 Issue 412 Pages 328-341
Published: May 05, 1969
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSDownload PDF (2622K)
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