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- TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C
- TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B
- TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A
- Transactions of the Japan Society of Mechanical Engineers Series C
- Transactions of the Japan Society of Mechanical Engineers Series B
- Transactions of the Japan Society of Mechanical Engineers Series A
Volume 9 (1943 - 1944･･･
- Issue 37-4 Pages 113-
- Issue 37-3 Pages 53-
- Issue 37-2 Pages 103-
- Issue 37-1 Pages 161-
- Issue 36-4 Pages 89-
- Issue 36-2 Pages 69-
- Issue 36-1 Pages 121-
- Issue 35-4 Pages 27-
- Issue 35-3 Pages 23-
- Issue 35-2 Pages 43-
- Issue 35-1 Pages 33-
- Issue 34-4 Pages 1-
- Issue 34-3 Pages 1-
- Issue 34-2 Pages 1-
- Issue 34-1 Pages 1-
Volume 8 (1942)
- Issue 33-4 Pages 215-
- Issue 33-3 Pages 33-
- Issue 33-2 Pages 63-
- Issue 33-1 Pages 185-
- Issue 32-4 Pages 185-
- Issue 32-3 Pages 21-
- Issue 32-2 Pages 53-
- Issue 32-1 Pages 117-
- Issue 31-4 Pages 101-
- Issue 31-3 Pages 1-
- Issue 31-2 Pages 25-
- Issue 31-1 Pages 43-
- Issue 30-4 Pages 1-
- Issue 30-2 Pages 1-
- Issue 30-1 Pages 1-
Volume 22, Issue 114
Displaying 1-9 of 9 articles from this issue
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Susumu YOKOBORI1956 Volume 22 Issue 114 Pages 73-74
Published: February 25, 1956
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSDownload PDF (433K) -
Tokio SASAKI, Toshio TESHIMA1956 Volume 22 Issue 114 Pages 75-79
Published: February 25, 1956
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSIn pursuit of information concerning the performances of the high speed rolling bearings operating under oil bath 1ubrication and light load, measurements of bearing temperature rise and friction coefficient have been made using radial ball and roller bearings of 40mm bore with pressed cages. As the lubricant, spindle oil or turbine oil is applied and the level of oil bath is always kept in somewhat lower than the centre of rolling element which is placed at the lowest position in the bearing. The experimental results of bearings, operated at a rotating speed up to 24, 000 rpm for the ball bearing and 16, 000 rpm for the roller bearing, indicate that the bearing temperature rise and friction coefficient increase proportionally to the rotating speed of bearing. From the fact that bearings had been operated securely under such high speed, it may be convinced that, under light load, the oil bath lubrication can be applied for a speed far higher than the speed which is adopted customarily under the limitation of dn-value of 250, 000. Furthermore, at such a high speed, the friction coefficients of bearings under oil bath lubrication take the values nearly twice as the values lubricated with minimum oil, and such differences depend on the hydrodynamic friction losses owing to churning oil.View full abstractDownload PDF (724K) -
Tokio SASAKI, Kenjiro OKAMURA, Toshio TESHIMA1956 Volume 22 Issue 114 Pages 79-84
Published: February 25, 1956
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSIn this paper the life of crushing roll, the wear of formed grinding wheel and the accuracy of the ground workpiece in the practice of crush-dressed form-grinding are investigated. The experimental results are as follows : -(1) The smaller the grain and the lower the peripheral speed of wheel and in-feed speed of crushing roll, shorter the life of crushing roll. But at higher speeds both peripheral and in-feed, the grinding wheel becomes apt to be cracked.(2) The wear of crush-dressed wheel in the grinding practice is not so much. However, the loading of wheel seems to occur owing to the increased length of contact arc in the contour-grinding.(3) The dimensional accuracy of ground workpiece may be kept in more or less 10.View full abstractDownload PDF (1115K) -
Akira YAGI1956 Volume 22 Issue 114 Pages 85-90
Published: February 25, 1956
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSIn the first and second reports, the author described a result of test on a method of prevension of wear on both rail and tyre. In this test, hardened rail was watched against unhardened tyre or hardened tyre against unhardened rail, under both dried and lubricated conditions, and an amsler testing machine was used. In the present report (3rd report) the author compared the test result mentioned above with the octual condition of wear of the rail and tyre and the following results have been made clear : 1. Under a dry condition, if both rail and tyre are not hardened, a very similar result was shown in both of them. 2. In other cases, the tendency can be concluded. 3. At present condition of railways, these preventitive methods against wear are not completely put in force.View full abstractDownload PDF (870K) -
Shinichiro TAKEDA, Yasumasa AWAKAWA, Hiroshi SUZUKI1956 Volume 22 Issue 114 Pages 91-97
Published: February 25, 1956
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSWe constructed a new static balancing machine operating on the pneumatic principle by which the unbalance of the rotors of electric machines could be read directly on an indicator and no lengthy operations required. The detail of the construction of the balancing machine is described with the schematic diagram and the precisely measured characteristic values of the principal parts of the machine. The maximum range of the indicator of the machine is ±150 g-cm and the accuracy is about 1 g-cm through the whole range. The performance of the balancing machine was investigated theoretically on the statical equilibrium and on the dynamical aspects. The calculated period of the natural oscillation of the machine is 5.4 sec against 5.2 sec which is a measured value. The oscillation caused by the up and down motion of rotors damped out in about 20 sec. The measurement of the unbalance must be made twice for one rator (x-direction and y-direction), so the total time of operation for the balancing of one rotor will be less than 60 sec.View full abstractDownload PDF (1288K) -
Akijiro BABA1956 Volume 22 Issue 114 Pages 97-102
Published: February 25, 1956
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSBoth the direct and reverse redrawing forces of circular shells were estimated by stress analysis where the thickness and the yield stress of the blank were assumed to be constant over the deforming region and the equivalent stress of the blank was assumed to be in proportion to n power of the equiva1ent logarithmic strain. In the case of redrawing of a cup primarily drawn under practical drawing ratio, intermediate annealing was always favourable for every material. The larger the modulus of work-hardening of the materia1 was, the greater effect the intermediate annealing had. The redrawing ratio was lowered when the plane drawing ratio was increased, whether the intermediate annealing was done or not. The total drawing ratio, however, was raised when the plane drawing was done under higher dra wing ratio. These conclusions were confirmed by experiments on Al, Cu and 70 : 30 Brass.View full abstractDownload PDF (737K) -
Hisashi KAMOGAWA1956 Volume 22 Issue 114 Pages 102-109
Published: February 25, 1956
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSThe matrix method was applied to the analysis of the under picking mechanism of powerlooms, assuming the side lever and the picking stick are both rotating elastic beams with the uniform cross sections, and the stick cap is a rigid body. For various values of the shutt1emass, the swell resistance and the crank shaft r. p. m., the good agreements were obtained between the experimental results and the numerical calculations in which the oscilations of the higher orders were neglected. The strobo-flash and the four cameras were used for measurements of the picking motion. The above method of the analysis is the more distinguished one on the accuracy than that in which the masses of the side lever and the stick are neglected for those of the shuttle and the picker.View full abstractDownload PDF (1195K) -
Shizuo SENJU1956 Volume 22 Issue 114 Pages 109-112
Published: February 25, 1956
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSConcepts of stochastic processes and marginal productivities are applied to determine the optimum assignment of repairmen of given numbers to maximize the production from given numbers of machines, which are liable to stop at random intervals and then require the repairmen's attention for a random period of time before restarting. Graphs of marginal productivities with respect to machines are shown for graphical solutions to the problems of differently skilled repairmen. In the present paper, the distributions of the requisite attention times for each failure are assumed to be of general Gamma type, and each repairman is requirend to attend a number of machines independently.View full abstractDownload PDF (593K) -
Kanji FUJISAWA, Ichiro TOJO1956 Volume 22 Issue 114 Pages 113-115
Published: February 25, 1956
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSDownload PDF (651K)
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