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Volume 38, Issue 455
Displaying 1-14 of 14 articles from this issue
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[in Japanese]1972 Volume 38 Issue 455 Pages 991-996
Published: December 05, 1972
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSDownload PDF (998K) -
[in Japanese], [in Japanese]1972 Volume 38 Issue 455 Pages 997-1001
Published: December 05, 1972
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSDownload PDF (686K) -
Takao KAYABA, Koji KATO, Toyokazu KONISHI1972 Volume 38 Issue 455 Pages 1002-1010
Published: December 05, 1972
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESShe normal displacement in the frictional process reflects the statistical stability of the interface and the degree of deformation of asperities.
Therefore, the phenomenon of the normal displacement is very effective for the analysis of the frictional mechanism. Besides in practice, the phenomenon is very important for the movement of a cutting plate or the frictional force of some sandwitched thing.
So that, this paper analyzes the mechanism of the phenomenon theoretically and experimentally. As a result, the number, the size, and the degree of deformation of the contacting asperities which take effect on the normal displacement are estimated.
It is also prooved that the normal displacement take little effect on the coefficient of friction.View full abstractDownload PDF (1187K) -
Kozo KISHI, Hiroshi EDA, Masaharu UNAGAMI1972 Volume 38 Issue 455 Pages 1011-1017
Published: December 05, 1972
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSThe present paper deals with the fine structure in a machined layer of the secondary phase grain such as that of cementite phase etc. And, the fine structure is discussed from metallugical point of view as a model of the secondary phase grain in an aluminium-silicon alloys. A particular attention is paid to the formation of fine structure in a machined layer according as the existence or not of a built up edge. Main results obtained are as follows:
(1) The deformed primary crystal silicon of eutectic structure can be observed: Crashed and partly disappeared silicon, cracked one and that flowing in the direction of machining with the matrix, successively in the direction of depth from the skin of machined surface.
(2) The transition zone of the fine structure of the primary crystal silicon in a cutting zone reaches the tool edge from the free face side of a boundary surface between the machined material and chips and occupies a vast zone of including the place where machined layer is to be positioned.
(3) The transition zone of the fine structure with a built up edge occupies a vaster zone than that without the built up edge and along a built up edge nose the fine structure is formed from the skin of machined surface in the order as shown in (1).
(4) The silicon and aluminium in eutectic structure excessively extends fibrously in the built up edge nose and a part of it constitutes the fibrous structure of machined layer.View full abstractDownload PDF (20487K) -
Hiroyuki YOSHIKAWA1972 Volume 38 Issue 455 Pages 1018-1023
Published: December 05, 1972
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSAlthough automated design has been said to be very hopeful, intuitive methods still have their place in the field of machine design. The reason why it is unsuccessful to provide a fully automated design system including the processes: construction of machine structure, allocation of machine elements in space and supplying functional form upon them is that these processes are difficult to treat mathematically at the moment, due to lack of theoretical aspects upon them. The present paper deals with some methods of representation of mechanical machine which indicate explicitly the elements and their connectivity in graph-theo-retical manner. As elements, solid sets of parts, parts as machined and functional form elements are designated and respectively their connectivity is represented graph-theoretically. It is revealed that each graph has unique feature which closely relates to the function of the machine. In the design process of a machine materialization proceeds step by step from functional needs to final drawings which include all neccessary information to manufacture it. The graphs are useful for each design step respectively, suggesting the possibility of construction of design theory of mechanical machine by use of these graphs. Some applications to other problems are also disccussed.View full abstractDownload PDF (1025K) -
Study on Fretting Wear (1st Report)Tadasu TSUKIZOE, Nobuo OHMAE1972 Volume 38 Issue 455 Pages 1024-1029
Published: December 05, 1972
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSThe phenomenon of fretting wear has been a particular case of wear, which is caused by the slight relative slip motion that occurs between surfaces of vibrating metal members. The severe loss of dimentional accuracy, and subsequent failure in structural components provided the impetus for a very considerable research effort culminating in a number of highly technical research reports. Since fretting is a type of wear, it should be mitigated by proper lubricants, but the investigations in oil are relatively few. The purpose of this report was to experimentally determine the effect of the amplitude of relative slip on fretting wear damage with line contact both in oil and in air. The discharging of wear debris is thought to have an intermediate property with line contact compared with point and area contacts. When the specimens were completely surrounded by oil, oxide debris, generally generated with fretting wear in air, did not form. Thus the effectiveness of oil is the prevention of severe fretting oxidation by the limitation in the supply of oxygen. The magnitudes of the wear damages, frictional forces, adhesive forces and electrical contact resistances were strongly dependent upon the amplitude of relative slip and the surface roughness of specimens. This tendency was especially marked in air.View full abstractDownload PDF (6177K) -
Izumo YAMAKAWA, Keiich SHIBATA1972 Volume 38 Issue 455 Pages 1030-1035
Published: December 05, 1972
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSThis paper describes some experiments and analogue-computer simulation on a new magnetic type of vibration absober consisting of two permanent magnets, floating magnet A and fixed magnet B, repelling each other. Two magnets put to the test are short columnar shaped, and arranged in vertical line in a diamagnetic cylindrical container as A can move freely against B fixed to the vibrating body.
The results obtainned are as follows:
(1) The repelling force of the magnet may by considered to be inversely proportional to the square of the distance between the equivalent two point poles.
(2) The amplitude of the target vibration of the body decreases considerably due to the violent vibration of the floating magnet.
(3) The damping force is adjustable effectively by a small hole bored in the center of the floating mgnet.
(4) The unsymmetricity of the amplitude is clearly recognized in the magnet vibration and the sub-harmonic resonance is possible for the slight damping, but such nonlinear behaviors are considered to be of little importance in the practical use.
(5) The results of the analogue-computer simulation shows a good coincidence with those of the experiments from the qualitative point of view.View full abstractDownload PDF (1032K) -
Rack-Pinion gearings (1st Report)Yoshikazu HORIUCHI, Kozo KISHI, Kunio YAMADA, Masahiro SESAKI1972 Volume 38 Issue 455 Pages 1036-1041
Published: December 05, 1972
Released on J-STAGE: February 16, 2010
JOURNAL FREE ACCESSRecently, Computer-Aided Design (C. A. D.) in mechanical engineerings has been much highlighted. It is the intension of this paper to present C. A. D. of general involute spur gears by "E0-method". Although, designings of gears have to be reviewed from various angles, the determination of shapes of gears is first in order.
This paper is aimming at;
(1) clarifying of E0-curve by X-Y plotter,
(2) visualizing the criterions of the existence of proposed gear pairs by "Diagram (I)" traced by X-Y plotter,
(3) showing the meshing figures of desired gears being drawn by X-Y plotter using "pseudo-gear tooth method".
The 1st report is the case of Rack-Pinion gearings.View full abstractDownload PDF (763K) -
Changes of Metal Surface Properties Induced by Plastic Deformation (2nd Report)Yoshio TANAKA, Mamoru IDO1972 Volume 38 Issue 455 Pages 1042-1048
Published: December 05, 1972
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSThe differences of the surface properties of the metal during working between in various liquids and in the air are investigated from the comparison of the depth of the indentation and others, which are induced by ultrasonic hammering on the surface of S 15 C steel in various liquids involved the surface active agents and in the air, and from the observation of the indentation by the electron microscope.
The main results are as follows.
1. The depth of the indentation obtained in the solution of stearic acid in benzen is larger than that in the air and the ratio of the former to the latter tends to show the maximum in a certain concentration of stearic acid. It reaches to as much as 1. 5. On the other hand, the indentation in CCl4 is almost as same as that in the air.
2. Under the hammering parameters which can be obtained the same depth of the indentation in various sets of the magnitude of the amplitude and the load in the air, the indentation induced under the higher amplitude in the solution of stearic acide in benzen is larger than under a lower one. From this result and the electron microscopic observation of the indentation, it is shown that promoting the surface active effect by the pressure variation of liquid causes the metal surface to deform easily.View full abstractDownload PDF (3994K) -
Study of the Rate Dependent TheoryToshinori KORI, Toyomitsu SENDA, Takayoshi KANATA1972 Volume 38 Issue 455 Pages 1049-1054
Published: December 05, 1972
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSThe Malvern's theory is discussed which was proposed to explain the propagation of longitudinal plastic waves in the rate-dependent materials, comparing with the Karman's theory. Especially, we discuss whether the Malvern's theory can explain the propagation of plactic waves in various pre-strained alluminum.
And the four elements rheological elastic-viscoplastic model is considered to illustrate the phenomena. The main results obtained are as follows.
1) The Malvern's theory predicts on plastic front. And this prediction coindes with the experimental results. This fact suggests the material posseses viscocity.
2) The propagation velocities of plastic strains calculated from the Malvern's theory co-incide with the experimental results for two kinds of pre-strained alluminum, although this theory overestimates the velocity of the small strain.
3) The dynamic stress-strain curves in various distance from the impact end are calculated from the Malvern's theory.View full abstractDownload PDF (1034K) -
[in Japanese], [in Japanese], [in Japanese]1972 Volume 38 Issue 455 Pages 1055-1061
Published: December 05, 1972
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSDownload PDF (2135K) -
[in Japanese]1972 Volume 38 Issue 455 Pages 1062-1069
Published: December 05, 1972
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSDownload PDF (7227K) -
[in Japanese]1972 Volume 38 Issue 455 Pages 1070-1075
Published: December 05, 1972
Released on J-STAGE: February 16, 2010
JOURNAL FREE ACCESSDownload PDF (3968K) -
[in Japanese]1972 Volume 38 Issue 455 Pages 1077-1089
Published: December 05, 1972
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSDownload PDF (6177K)
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