Transactions of the Japan Society of Mechanical Engineers
Online ISSN : 2185-9485
Print ISSN : 0029-0270
ISSN-L : 0029-0270
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Volume 26, Issue 166
Displaying 1-13 of 13 articles from this issue
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  • On the Relation between Combustion Research and Engineering
    Heihachiro IIDA
    1960 Volume 26 Issue 166 Pages 789-790
    Published: June 25, 1960
    Released on J-STAGE: March 28, 2008
    DOIhttps://doi.org/10.1299/kikai1938.26.789
    JOURNAL FREE ACCESS
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  • Study on Gear Mechanism and Gear Cutting
    Siro MINOMO
    1960 Volume 26 Issue 166 Pages 791-798
    Published: June 25, 1960
    Released on J-STAGE: March 28, 2008
    DOIhttps://doi.org/10.1299/kikai1938.26.791
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    To explain the conditions neccessary for a pair of involute gears, the author suggests a method using operating pressure angle α and tip pressure angles φ1, φ2 as parameters. And also, the author suggests the method of gear cutting by rack-shaped cutter using "coefficient of cuttins-in", which is concerned with the tooth corner shape, instead of the usual method by coefficient of profile shifting. By graphical solutions to the both methods, gear mechanism and gear cutting are conveniently explained.
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  • On the Grinding Actions of Grinding Wheel Containing Solid Lubricants
    Ryozo FURUICHI, Kozo KISHI, Mamoru NAKAYAMA
    1960 Volume 26 Issue 166 Pages 799-802
    Published: June 25, 1960
    Released on J-STAGE: March 28, 2008
    DOIhttps://doi.org/10.1299/kikai1938.26.799
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    This paper describes the effects of the solid lubricants, with which the grinding wheel is permeated, on the grinding phenomena in cylindrical grinding of the axle steel supplying several kinds of grinding fluids in flow. The fat, as the solid lubricant, increases the grinding ratio and decreases the grinding wheel wear in the case of any grinding fluids used. It is effective in increasing the metal removal and in improving the roughness of the grinding wheel surface when used certain kinds of grinding fluids. The additives in the fat generally have a tendency of increasing the metal removal and reducing the roughness of wheel surface, though certain kinds of them are not always effective in improving the grinding ratio and in reducing the wheel wear.
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  • Effects of the Microscopic Roundness of the Cutting Edge on the Cutting Phenomena : 1st Report, Burnishing Action of a Cutting Edge
    Masasuke TUEDA, Yosio HASEGAWA, Tetuo NAKANO
    1960 Volume 26 Issue 166 Pages 803-808
    Published: June 25, 1960
    Released on J-STAGE: March 28, 2008
    DOIhttps://doi.org/10.1299/kikai1938.26.803
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    Every cutting tool has a microscopic roundness on its cutting edge, and partly shows a burnishing action on the machined surface. The object of the present research is to study the relations between the radius of the roundness of the cutting edge and the depth of burnishing, as well as the resistance of the burnishing action.
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  • Effects of the Microsopic Roundness of the Cutting Edge on the Cutting Phenomena : 2nd Report, Stress Distribution on the Surface of a Cutting Edge
    Masasuke TUEDA, Yosio HASEGAWA, Tetuo NAKANO, Yozi HUKUDA
    1960 Volume 26 Issue 166 Pages 809-813
    Published: June 25, 1960
    Released on J-STAGE: March 28, 2008
    DOIhttps://doi.org/10.1299/kikai1938.26.809
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    In order to verify the existence of the burnishing action due to the microscopic roundness of the cutting edge as reported in the first report, we tried to find the stress distribution on the surface of the tool point. Preparing a cuting tool made of epoxy resin as photoelastic material, and cutting a lead pipe with it, we have made the stress distribution in the tool material clear by the photoelastic experiments. Namely, at the middle point of the roundness, the shearing stress changes its sign showing the existence of the burnishing action and the considerable normal stress concentration occurs.
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  • Investigations on the Differential Speed Type Thread Rolling Machine : 1st Report, Rolling Pressure and the Calculation of the Center Distance between Rolling Dies
    Akira YAMAMOTO, Kazuhiko AKASHI, Isamu YOSHIMOTO, Hiroshi TAGUCHI
    1960 Volume 26 Issue 166 Pages 813-819
    Published: June 25, 1960
    Released on J-STAGE: March 28, 2008
    DOIhttps://doi.org/10.1299/kikai1938.26.813
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    The differential speed type thread rolling machine was invented by YAMAMOTO, and industrialized by AKASHI. The investigations of the problems which were experienced in connection with the industrialization of this machine are summarized in this report. The first report describes the principle of this machine and the problems concerning the rolling pressure. On the differential speed type thread rolling machine, two cylindrical dies are used and their speeds are not equal. The blank is fed in the tangential direction by utilizing the speed difference. This machine is suitable for the mass production of the precision screws. The rolling pressure was measured on the industrialized machine, and the experimental values were compared with the calculated values according to YAMAMOTO'S theory. Both values show a good agreement. The method of calculating the center distance between two dies, in which the thread is formed completely and the excessive load is not imposed on the machine, was established. For this purpose the deflection of the main shaft, the elastic deformation of the blank and so on were discussed.
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  • Investigations on the Differential Speed Type Thread Rolling Machine : 2nd Report, Rolling Power and the Calculation of the Outside Diameter of Rolling Die
    Akira YAMAMOTO, Kazuhiko AKASHI, Isamu YOSHIMOTO, Hiroshi TAGUCHI
    1960 Volume 26 Issue 166 Pages 820-826
    Published: June 25, 1960
    Released on J-STAGE: March 28, 2008
    DOIhttps://doi.org/10.1299/kikai1938.26.820
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    In the second report the following problems of the differential speed type thread rolling machine are discussed : (1) the power required for thread rolling, (2) the axial movement of the blank during thread rolling, (3) the calculation of the outer diameter of the die. The tangential force acting on the die is the most important factor of the power required for thread rolling. Also the power consumed at the parts of the power transmission mechanism must be considered. The output of the main motor in the case that the screw thread is rolled by the differential speed type thread rolling machine was measured. The experimental values were compared with the values estimated on the basis of the rolling pressure and the tangential force. Both values show a good agreement. It is desirable to make the axial movement of the blank during the thread rolling as small as possible. The amount of the axial movement of the blank on the industrialized machine was measured. The experimental values agree with the values calculated according to YAMAMOTO's theory. The method or calculating the outer diameter of the die, in which the amount of the axial movement of the blank is minimized and the effective working zones are uniformly distributed over the die surface, was established.
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  • Fundamental Research on the Ultrasonic Planer and Shaper
    Junichiro KUMABE
    1960 Volume 26 Issue 166 Pages 827-832
    Published: June 25, 1960
    Released on J-STAGE: March 28, 2008
    DOIhttps://doi.org/10.1299/kikai1938.26.827
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    In this report, a new tool-post by using a straight bar of ultrasonic torsional vibration which is much important element of the ultrasonic planer or shaper, is investigated. This tool-post is able to conduct ultrasonic planing and shaping of any profile work smoothly and the mean cutting resistance is decreased to about 1/5∼1/20 of the conventional and a smoothed surface is easily obtained. In addition, it has been found that this machined surface shows same durability of the surface grinding against corrosion by acids and wear.
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  • Noise of Ball Bearing : 2nd Report, Clearance Effect on Simple Ball Bearing Noise
    Teruo IGARASHI
    1960 Volume 26 Issue 166 Pages 833-840
    Published: June 25, 1960
    Released on J-STAGE: March 28, 2008
    DOIhttps://doi.org/10.1299/kikai1938.26.833
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    It is well known by experience that a noise of simple ball bearing is affected by the clearance. However, there has been no research work which described clearance effect on simple ball bearing noise and its causes. The author measured the noise of simple ball bearing with known radial clearance, analyzed about the peak values of the frequency spectrums, and obtained the results as follows : - (1) The noise of a simple ball bearing is affected by the amount of radial clearance, loading direction and the amount of load etc. (2) The frequencies and the total sound pressure level of the noise are increased by decreasing radial clearance. (3) Principal frequencies of the noise correspond to the bending natural frequencies of the outer ring with load. (4) The total sound pressure level of the noise is determined by the sound pressure level of a peak in the case of axial load, but the sound pressure levels of all peaks in the case of radial load.
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  • Rolling Friction Lubricated with Solid Lubricants
    Tokio SASAKI, Toshio TESHIMA
    1960 Volume 26 Issue 166 Pages 841-849
    Published: June 25, 1960
    Released on J-STAGE: March 28, 2008
    DOIhttps://doi.org/10.1299/kikai1938.26.841
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    Recently, the high temperature lubrication of rolling bearings using powder solid lubricants have been investigated, and we have studied and reported it. For the purpose of obtaining the fundamental data about the high temperature lubrication of rolling bearings lubricated with solid lubricants, rolling friction is measured using a simple rolling friction apparatus in which two balls are rolled between the two flat surfaces under load. The experimental results obtained are as follows : Taking the rolling resistance F, load on ball W, diameter of ball D, Brinell hardness number of flat surface PH, F is proportional to W1.5, D-1.7 and PH-2.0 respectively. There exist the most suitable quantities of lubricants, and the rolling resistance increases rapidly when the quantities of lubricants exceed the most suitable quantities. Allowable load capacity of contact point between ball and flat surface is increased owing to the lubrication with solid lubricant. We are able to comfirm the lubrication performances of solid lubricants by means of microscopic observation of grooved track.
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  • Critical Conditions of Wrinkling in Deep Drawing of Sheet Metals : 1st Report, Foundations of Analyses and Results for Conditions is No Blank-Holding
    Nozomu KAWAI
    1960 Volume 26 Issue 166 Pages 850-857
    Published: June 25, 1960
    Released on J-STAGE: March 28, 2008
    DOIhttps://doi.org/10.1299/kikai1938.26.850
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    In this investigation, the author examined the emtirical phenomena of wrinkling and accounted for the mechanisms of preventing wrinkling in deep drawing operations, and concurrently infered theoretically the formulas to predict the critical conditions of wrinkling which are not inconsistent with the experimental results. As the first report, the foundations of analytical methods and the results for conditions of no blank-holding are reported. From the equilibrium equation of moments on half the wave-length of flange wrinkles, the critical conditions of wrinkling were induced and discussed for the case where no blank-holding plate is used. Consequently, the theoretical formulas which predict the number of waves and the critical blank thickness were found to agree well with the experimental results.
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  • Critical Conditions of Wrinkling in Deep Drawing of Sheet Metals : 2nd Report, Analysis and Considerations for Conditions of Blank-Holding
    Nozomu KAWAI
    1960 Volume 26 Issue 166 Pages 857-863
    Published: June 25, 1960
    Released on J-STAGE: March 28, 2008
    DOIhttps://doi.org/10.1299/kikai1938.26.857
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    In this report, basing on the equilibrium equation of moments induced in the first report, the critical conditions of wrinkling are considered and discussed for the case where a blankholding plate is used. In the practice of the deep drawing operations, we must often allow the small flange wrinkles, but when the wave amplitude of wrinkles in flange is lower than the allowoble value the cups remain practically no wrinkles, because the effects preventing the flange wrinkles exist in the die radius. Consequently, the existence of the allowable wave amplitude of wrinkles in flange is infered and then by means of inducing it into the equation the author can propose a formula predicting the critical blank-holding pressure necessary to prevent the development of radial wrinkles in the flange.
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  • Critical Conditions of Wrinkling in Deep Drawing of Sheet Metals : 3rd Report, Prediction of Critical blank-Holding Pressure
    Nozomu KAWAI
    1960 Volume 26 Issue 166 Pages 864-873
    Published: June 25, 1960
    Released on J-STAGE: March 28, 2008
    DOIhttps://doi.org/10.1299/kikai1938.26.864
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    In this report, the validity of the theoretical formula to predict the critical blank-holding pressure is checked by the experiments as minutely as possible. Consequently, the formula has been found satisfactory to predict the critical blank-holding pressure necessary for the case of aiming at the cup remaining the local wrinkles, provided that we apply the constant value nearly equal to the specific wave amplitude of the wrinkles developing locally in flange as the allowable specific wave amplitude of wrinkles ωτγ to the formula. In the case of aiming at the cup remaining the vestige of wrinkles or the cup of no wrinkles, we can predict the critical blank-holding pressure necessary for these cases by means of applying the multiplier ωB or ωA instead of the ωτγ to the formula.
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