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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 27, Issue 175
Displaying 1-13 of 13 articles from this issue
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Kenji CHIJIIWA1961 Volume 27 Issue 175 Pages 267-268
Published: March 25, 1961
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSDownload PDF (427K) -
Susumu KASEI1961 Volume 27 Issue 175 Pages 269-277
Published: March 25, 1961
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSChanges of the accuracy and performance of the fire-damaged machine tools were investigated in this paper. First, we measured the intact accuracy of the lathe bed of the fire-damaged machines, and found out the considerable change in its shape. Because we understood the cause of this change depends on the difference of the fire conditions, we made researches on the model lathe beds in the variation of the temperature, time and the various aftertreatment of the heated beds. The result of experiments revealed that the shape changes were no so conspicuous at the temperature up to 600°C, but were remarkable at the temperature ranging from 600°C to 800°C. The further temperature rise caused the rapid degradation of accuracy and the water jet upon the heated parts caused the marked deformation.View full abstractDownload PDF (1133K) -
Susumu KASEI1961 Volume 27 Issue 175 Pages 277-285
Published: March 25, 1961
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSIn this paper, we studied the changes of the accuracy and the performance of the ball bearings. As a result of experiments, we have obtained the following empirical formula : p=aebt in which p : the decrease of the accuracy, t : the fire temperature, a and b : constants. We discovered that the fire damaged bearings could not be used under the heavy load, but unless strict accuracy is required, the bearing that has been exposed to the heat not higher than 600°C can be used again as it is. However in this case the load on the bearing should be limited to a light load and the factor of safety must be big enough, say 5 or even more. We have verified the above by the endurance tester. We made a similar researches as to the plain bearing, and we discovered that the changes of the performance were not so rapid as compared with the ball bearing.View full abstractDownload PDF (1051K) -
Susumu KASEI1961 Volume 27 Issue 175 Pages 286-293
Published: March 25, 1961
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSWe studied the accuracy change of some driving mechanisms of the machine tool damaged by fire (i.e. spindles, shafts, toothed gears and threads). In our research the objects were heated by artificial fire. The run out of the fire-damaged steel shaft too was in the same tendency as the deformation of the bed surface of fire-damaged lathe (that was previously reported). At a comparatively lower temperature of fire, the involute curve of the cast iron gear tooth deformed slightly only at the addemdum part. But when the temperature of fire rose beyond the A1 transformation of iron and steel, this deformation occurred considerably not only at addemdum part but also at deddemdum part. At a temperature of fire higher than 800°C, the noise and the vibration of the toothed gears increased remarkably. This increase of the noise and vibration corresponded to the accuracy change of the fire-damaged tooth.View full abstractDownload PDF (1061K) -
Susumu KASEI1961 Volume 27 Issue 175 Pages 293-299
Published: March 25, 1961
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSInasmuch as the changes of the surface roughness of the fire-damaged parts have affected the accuracy and the frictional performance of the machine, we studied the formation of the oxide film and the changes of the surface roughness of the fire-damaged machine elements. As explained in the preceding reports, the accuracy of the fire-damaged machine is severely influenced by the fire conditions, especially by its temperatures. For practical purpose, it is most convenient to measure the surface hardness in order to judge this condition. In this paper, we studied this hardness problem. The micrograph of the metals damaged by the fire was also investigated.View full abstractDownload PDF (1152K) -
Tokuzo MATUYAMA, Hideo SUZUKI1961 Volume 27 Issue 175 Pages 300-310
Published: March 25, 1961
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSIn the plastic bending of sheet metals, spring back is a well-knoun phenomenon as a very complex and difficult problem. In this report, the authors deal with experimentally the process of deformation in the plastic bending of sheet metals with the V-die and the punch and the effects of various factors on the spring back in the matter mentioned above. The results showed as follows : i) the process of deformation was divided into two main types, each of which had the respective change of spring back. ii) spring back was mainly influenced by bending load, but the degree of its influencedepended on the ratio of the radius R at the extreme point of punch to the thickness t of sheet metals. Moreover, authors tried to find a theoretical grounds on "spring back and go". The results obtained in the analysis well agree with the experiments.View full abstractDownload PDF (1288K) -
Masahiro UTAGAWA, Tatuo HARADA1961 Volume 27 Issue 175 Pages 310-317
Published: March 25, 1961
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSDynamic loads on spur gear teeth are measured by a high speed gear testing machine at a periphery speed of 80 m/s and below. The ground gears (some of them have pressure angle errors) are tested as reduction gears and also as speed-up gears respectively. The maximum dynamic loads occur at the critical speed, at which the conjugating frequency is equal to the natural frequency of the vibratory system consisted of the pinion, gear and the teeth stiffness. At a speed higher than the critical one, the magnitude of the dynamic load approaches a certain constant which is determined by the teeth errors. When the errors are repeated in each conjugation as in this case, dynamic loads of the gear tested as a follower are nearly equal to the ones tested as a driver.View full abstractDownload PDF (1227K) -
Takeo TUTIKAWA1961 Volume 27 Issue 175 Pages 319-328
Published: March 25, 1961
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSTo manufacture folding-less gears by hot-rolling process, the auther experimentally investigated the rolling conditions. The results or preliminary experiment by using soft materials revealed that the raise-up of the metal varied with the plasticity of the material which was to be rolled, rolling speed, and sliding action on the respective faces of the teeth at the moment of the generating motion. Applying these results to the hot-rolling of steel gears, module m=2∼3, rolling conditions such as the heating temperature, depth of the heated zone, pressing speed of the die-roller and rotating speed of the gear blank, have been obtained. The metal structure of the gear rolled hot under these conditions is satisfactory without showing any crack or folding on the rolled teeth.View full abstractDownload PDF (1754K) -
Takeo TUTIKAWA1961 Volume 27 Issue 175 Pages 329-339
Published: March 25, 1961
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSThe results of the investigations on the accuracy of hot-rolled gears reveal that the accuracy is controlled by the shape of gear blanks, heating time, finishing rotations and pressing method of die-rollers besides the accuracy of die-rollers and rolling devices and gear blanks. The results of the investigations on the collapses found near the pitch circle of rolled teeth reveal that these collapses is caused by the sliding friction and the variation in the contacting pressure on the tooth face.View full abstractDownload PDF (1862K) -
Takeo TUTIKAWA1961 Volume 27 Issue 175 Pages 339-347
Published: March 25, 1961
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSIn order to investigate the structure of the gear rolling machine which is suitable for manufacturing practical gears, the auther made experimentally various gear rolling machines, and compared their performances. The results reveal that the most accurate gears are rolled by using a double side pressing type hydraulic rolling machine. Referring to these results, the auther made a full automatic gear rolling machine, and examined the perfomances of heating equipment and the gear rolling machine. The results show that the performances of the heating equipment and the gear rolling machine are stable, and the accuracies and sizes of the hot-rolled gears hold uniformity during mass production.View full abstractDownload PDF (1042K) -
Takeo TUTIKAWA1961 Volume 27 Issue 175 Pages 348-356
Published: March 25, 1961
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSThe auther investigated the metal structure, bending strength, and the deformation caused by heat treatment of hot-rolled gears. The results reveal that the fibrous structure of material lies along the tooth form, and the crystal structure is of minute structure. The results of the bending test show that the hot-rolled gear is apparently stronger than the cut gear in the impact bending strength and almost equal or slightly stronger in the static bending strength. The deformation of hot-rolled gears as a whole and of their tooth form, when hardening, is made clear by the experimental results.View full abstractDownload PDF (1103K) -
Shoichi FURUHAMA, Tadayuki SUMI1961 Volume 27 Issue 175 Pages 357-365
Published: March 25, 1961
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSSome experimental studies are made on the oil film thickness of the piston-ring which was obtained theoretically in the 1st report. The similar apparatus as in 2nd report is used, and the 1st method of this work is the measurement of the electric resistance between the cylinder and whole body of the piston-ring or its certain local parts, and the 2nd method is the measurement of the circumferential displacement of the gap of ring. From these experiments, it is shown that the appearance of variation and the absolute value of the thickness of oil film measured against the phase of a stroke and a μU/W which is determined by the running condition coincide approximately with the results of theoretical calculation.View full abstractDownload PDF (1685K) -
Keizo NAKAGAWA1961 Volume 27 Issue 175 Pages 366-371
Published: March 25, 1961
Released on J-STAGE: March 28, 2008
JOURNAL FREE ACCESSDownload PDF (927K)
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