All issues
Volume 44, Issue 521
Displaying 1-16 of 16 articles from this issue
- |<
- <
- 1
- >
- >|
-
[in Japanese]1978 Volume 44 Issue 521 Pages 539-544
Published: May 05, 1978
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSDownload PDF (1095K) -
[in Japanese]1978 Volume 44 Issue 521 Pages 545-549
Published: May 05, 1978
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSDownload PDF (1168K) -
[in Japanese]1978 Volume 44 Issue 521 Pages 550-556
Published: May 05, 1978
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSDownload PDF (1438K) -
[in Japanese]1978 Volume 44 Issue 521 Pages 557-563
Published: May 05, 1978
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSDownload PDF (1821K) -
[in Japanese]1978 Volume 44 Issue 521 Pages 564-569
Published: May 05, 1978
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSDownload PDF (1378K) -
[in Japanese]1978 Volume 44 Issue 521 Pages 570-576
Published: May 05, 1978
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSDownload PDF (1853K) -
[in Japanese]1978 Volume 44 Issue 521 Pages 577-587
Published: May 05, 1978
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSDownload PDF (981K) -
[in Japanese], [in Japanese], [in Japanese]1978 Volume 44 Issue 521 Pages 582-588
Published: May 05, 1978
Released on J-STAGE: February 16, 2010
JOURNAL FREE ACCESSDownload PDF (1354K) -
[in Japanese]1978 Volume 44 Issue 521 Pages 589-596
Published: May 05, 1978
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSDownload PDF (1751K) -
[in Japanese], [in Japanese], [in Japanese], [in Japanese], [in Japane ...1978 Volume 44 Issue 521 Pages 597-602
Published: May 05, 1978
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSDownload PDF (1547K) -
Nobuhiro TSUDA, Kenichi NAKANO, Masaji SAWABE, Akira TOYAMA1978 Volume 44 Issue 521 Pages 603-608
Published: May 05, 1978
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSA newly developed elastic deflection apparatus for obtaining precise linear and angular microdisplacement is reported. The apparatus has a simple coaxial cylinder structure that can be easily manufactured using a lathe. Equations for the displacement ratio and table horizontality are theoretically derived, and the values calculated from these equations show good coincidence with those obtained by experiments. As for the linear displacement, the apparatus can set a position with 0.01 μm resolution over a 4 μm range, and the table horizontality is kept within 0.01" over the same range. As for the angular displacement, the apparatus can set an angular displacement such as 0.77", 0.38" or 0.15" by means of a photoelectric autocollimator.View full abstractDownload PDF (1190K) -
Analysis of the Repelling ForceHiroyuki KOJIMA1978 Volume 44 Issue 521 Pages 609-614
Published: May 05, 1978
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSIn this paper, characteristics of the repelling force acting between the same poles of the cylindrical rare-earth magnets are presented. The analysis is made theoretically under the assumption that the magnets are homogeneous and magnetized uniformly along the axial direction. From the numerical calculation it becomes clear that the repelling force has nonlinear characteristics as follows:
(1) The repelling force is proportional to the product of the following two quantities; the square of the magnetization strength and the characteristic function determined by the shape and the volume as well as the center distance of the magnets.
(2) Within the limited range of the vibration amplitude, the repelling force may be assumed to be inversely proportional to the nth power of the center distance between the two magnets.
(3) The nonlinearity of the repelling force depends upon both the characteristic exponent decided by the shape of the magnets and the falling amount of the free magnet due to the gravity.
(4) The results of the experiment show the good coincidence with those of the numerical calculation.View full abstractDownload PDF (1076K) -
Hiroto MIYASAKA, Takashi AIZAWA1978 Volume 44 Issue 521 Pages 615-621
Published: May 05, 1978
Released on J-STAGE: February 16, 2010
JOURNAL FREE ACCESSSince the variance of tool life in metal machining is very large in general, statistic processing of tool life data is essential for programmable production. The purpose of this study is to implement the model of generalized tool wear equation with the reliable range by multiple regression analysis, and thereby to deduce the tool life equation of quantitatively assured reliability. According to the experimental results in consideration of the tool wear of initial cutting time, the simple tool wear equation was taken in practically useful accuracy, and its reliable range was defined. The tool wear equation can be expressed as W=KVβ1fβ2tβ3E, where W is crater or flank wear, V, cutting velocity, f, feed, t, cutting time and E, error. Further, this method was applied for assessing the performance and quality control of commercial carbide tips from several carbide manufacturers.View full abstractDownload PDF (1151K) -
Sadahiko TAKEDA, Masaru KOISHI1978 Volume 44 Issue 521 Pages 622-626
Published: May 05, 1978
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSThis paper describes the experimental results on the dynamic behavior of the Belleville springs stacked in series with washers and some process for deducing its dynamic character from the static load-deflection curve. Comparing the experimental results with those of the calculation, it is concluded that:
(1) For demonstrating the hysteresis phenomena on a static load-deflection curves of the Belleville springs stacked in series with washers, it is necessary to take the frictional force between the contact surfaces into consideration. Thus, the experimental results agree fairly well with the calculated ones.
(2) It is found that both the dynamic spring constants and the equivalent damping coefficients change in accordance with the amplitudes as well as the exciting frequencies, and those take the minimum values in the vicinity of the resonant frequency. And it can be said that vibration characteristics are the non-linear ones with soft-spring tendency.
(3) According to the process described in this paper, it is possible to deduce the dynamic character of the Belleville springs stacked in series quantitatively from the calculation.View full abstractDownload PDF (916K) -
Ground Surface Layer by Use of CBN, Diamond and WA Grinding WheelsKoz KISHI, Hiroshi EDA, Toshio OOGA, Kensuke URIGA1978 Volume 44 Issue 521 Pages 627-633
Published: May 05, 1978
Released on J-STAGE: February 16, 2010
JOURNAL FREE ACCESSThe present paper deals with the effects of various metal carbide particles and inclusions such as MC, M6C, M23C6, Fe3C, MnS, MnTe and Pb on the formation of damage and surface roughness in a ground skin layer. Particular attention is paid to the effects due to the difference of hardness of metal crystal grain and matrix structure. Main results obtained are as follows.
(1) As the mean diameter Dp of carbide particles (MC, M6C, M23C6) becomes greater than about 2μm, various changes in the metal grain are observed in the ground skin surface layer. Namely, they are divided into three typical types ; (i) crushed carbide, (ii) partly disappearing carbide, and (iii) cracked carbide.
(2) As the grain size becomes smaller than about 1μm, MC, M6C, M23C6 and Fe3C contribute as factors to the formation of surface roughness.
(3) Inclusions of lower or nearly equal hardness (Pb, MnS, MnTe) as compared with the hardness of matrix structure contribute to formation of void in various ground and damaged surfaces.View full abstractDownload PDF (2555K) -
Shoji ITO, Seisuke SAKAI, Masamitsu ISHIKAWA1978 Volume 44 Issue 521 Pages 634-639
Published: May 05, 1978
Released on J-STAGE: June 30, 2009
JOURNAL FREE ACCESSIn this paper, the rigidity and the strain output of a two dimensional dynamometer using elongated octagonal rings are analyzed by the elastic theory and finite element method. Then these results are discussed for the purpose to design a dynamometer with minimum cross sensitivity and high rigidity. The main results obtained are as follows :
(1) The rigidity and the output of a circular or an octagonal ring increase with the swell of the ratio (h/r) of thickness (h) to mean radius (r) of a ring.
(2) In an elongated ring, the rigidity and the output per unit displacement decrease remarkably. However, the increase of the second moment of area of the upper beam makes with effect better the rigidity and the output.
(3) In an octagonal ring, the direction, where the strain under the normal force is zero, depends on the value of h/r. While, the strain which results from the deformation of the upper and the lower beam moves that direction further. However, the improvement of the symmetry of the strain distribution for a horizontal axis reduces the cross sensitivity without the decrease of the output.View full abstractDownload PDF (1002K)
- |<
- <
- 1
- >
- >|