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Volume 49, Issue 11
Displaying 1-19 of 19 articles from this issue
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[in Japanese]1983 Volume 49 Issue 11 Pages 1475-1480
Published: November 05, 1983
Released on J-STAGE: January 20, 2010
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[in Japanese], [in Japanese]1983 Volume 49 Issue 11 Pages 1481-1487
Published: November 05, 1983
Released on J-STAGE: January 20, 2010
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[in Japanese]1983 Volume 49 Issue 11 Pages 1488-1493
Published: November 05, 1983
Released on J-STAGE: July 23, 2009
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[in Japanese], [in Japanese]1983 Volume 49 Issue 11 Pages 1494-1498
Published: November 05, 1983
Released on J-STAGE: July 23, 2009
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[in Japanese]1983 Volume 49 Issue 11 Pages 1499-1505
Published: November 05, 1983
Released on J-STAGE: July 23, 2009
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[in Japanese]1983 Volume 49 Issue 11 Pages 1506-1510
Published: November 05, 1983
Released on J-STAGE: July 23, 2009
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[in Japanese]1983 Volume 49 Issue 11 Pages 1511-1516
Published: November 05, 1983
Released on J-STAGE: July 23, 2009
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Optimum Design MethodKunio KOIZUMI, Yasuo YOKOYAMA1983 Volume 49 Issue 11 Pages 1517-1521
Published: November 05, 1983
Released on J-STAGE: July 23, 2009
JOURNAL FREE ACCESSThis paper presents the design method with the optimum impact conditions on the machine. In the conditions, the optimum setting gap of an anvil and frequency ratio are selected for production of strong impact. There are two following problems about the design. The first is the design procedure for a new machine. Given values are impulse and repetitive impact frequency. It decides finally mass of the hammer, stiffness of the suspension spring, setting gap of the anvil and amplitude of drive by displacement. The other is the method of improving for a manufactured machine. The method includes the problem which should be decided the optimum driving frequency and should be get mass of a new hammer or stiffness of a new spring in the structurally restricted maximum hammer displacement. An elementary condition for high ratio of impulse and input power is small losses of friction in a hammer guide and a suspension spring. In the case of use of the optimum conditions which give the maximum impulse or the maximum total amount of impulse per second, Om or Om' point, special attention should be paid to decrease the friction loss.View full abstractDownload PDF (876K) -
Scratch MethodSeiki MATSUI, Jun'ichi TAMAKI1983 Volume 49 Issue 11 Pages 1522-1527
Published: November 05, 1983
Released on J-STAGE: July 23, 2009
JOURNAL FREE ACCESSBy a statistical approach scratch method (measuring method of wheel surface topography) is analyzed theoretically and experimentally. Results are summarized as follows: (1) Grain cutting edge density obtained by scratch method is that of effective cutting edges which have effective concern with roughness generation. (2) The measuring accuracy in scratch method is improved by an increase in scratch depth and width, (3) Measuring process in scratch method is the same in essence as that of COFG (cluster overcut fly grinding) test, and there is no choice between the two. (4) Scratch method has a good point that the measuring device is simple and easy to handle, but has a difficult one that a considerably long time is expended on data processing, so an improved scratch method which can shorten the time is developed.View full abstractDownload PDF (1025K) -
Shinji SHIMIZU, Mamoru ITO, Riichi FUKUDA1983 Volume 49 Issue 11 Pages 1528-1533
Published: November 05, 1983
Released on J-STAGE: July 23, 2009
JOURNAL FREE ACCESSIn this paper, the relationships between the counterbore size and the deformation or interface pressure distribution of the bolted joint with a hexagon socket head cap screw are considered in detail by the Finite Element Method using a model of three contact bodies. The following results are found. (1) The smaller counterbore depth makes larger the deformation of the top surface of the jointed element because of the local deformation by the pressure at the bolt head bearing surface. (2) The smaller bearing surface height of the counterbore makes larger the concentration of the pressure distribution upon the circumference of the bolt hole because of the local deformation of the joint interface. (3) Depending upon purposes to improve the deformation or interface pressure distribution, it is more effective to enlarge the thickness of the jointed element with the enlargement of the counterbore depth or bearing surface height of the counterbore. (4) The effective area of the connecting force becomes minimum at about O. 6 of the ratio of the bearing surface height to the jointed element thickness. (5) A graphic method is proposed which can be guide for design of bolted joints with cap screws.View full abstractDownload PDF (1134K) -
Shoji MORIMOTO1983 Volume 49 Issue 11 Pages 1534-1539
Published: November 05, 1983
Released on J-STAGE: July 23, 2009
JOURNAL FREE ACCESSThe device is presented to improve the activity of the lower limb amputee, by constructing a new closed loop control system between amputee and artificial leg. Using the fluidics technology, the circuit is simple, compact and less than 150 g in weight, and is installed in the prosthesis. Each pressure of heel, large and small ball is detected with small rubber pouch installed in the artificial foot, and is modulated linearly to the stimulation frequency of pressure vibration from 10 to 80 Hz through the single feedback oscillator of bistable pure fluidics amplifier, sensitive to the output pressure. Each stimuli is displayed cutaneously on the stump of the amputee as pressure vibration with rubber pouch in the inner surface of the socket. The working fluid is dry air cleaned by 0.5 μm filter. From the psychophysical measurement of information transmission characteristics of the device, it is shown that the channel capacity is approximately 3. 8 bits, as large as conventional vibrotactile stimuli device.View full abstractDownload PDF (1027K) -
Motion Analysis of Fluid and Distribution of Film ThicknessYuzo MORI, Naoya IKAWA, Toru OKUDA, Kazuhisa SUGIYAMA, Kazuto YAMAUCHI1983 Volume 49 Issue 11 Pages 1540-1548
Published: November 05, 1983
Released on J-STAGE: January 20, 2010
JOURNAL FREE ACCESSThe present research aims to realize the numerically controlled ultra-precision machining which can easily finish the work into an arbitrary shape by a single apparatus, utilizing the elastic fracture of the order of atomic size. Ultra fine powder particles and water are mixed, and making the rotating sphere of polyurethane rubber approach to the material surface, the state of fluid lubrication of the mixed fluid is realized, so that powder particles in the mixed fluid are made to arrive on the surface. Then the elastic fracture of atomic size is achieved. In this report, the fluid motion between the rotating sphere and the work surface, and the movement of powder particles is introduced furthermore, the film thickness of fluid is measured, and the machined surfaces are observed. The following results are obtained. (1) The calculated value of the film thickness with EHD theory is good consistent with the measured value. And it is realized that the peripheral velocity of the polyurethane sphere has a great influence on its value. (2) Fluid film thickness which is caused by elasto-hydrodynamic lubricating state is much larger than the diameter of the powder particle, so this machining is not carried out with damage to the work surface which is the result of compulsive scratch, but is done by the fracture of the order of atomic size with no damage to the finished work surface.View full abstractDownload PDF (1385K) -
Tsuneo HAMAGUCHI, Seiichi YOSHII1983 Volume 49 Issue 11 Pages 1549-1554
Published: November 05, 1983
Released on J-STAGE: January 20, 2010
JOURNAL FREE ACCESSDecreasing the bow in a silicon wafer by lapping is discussed. In simultaneous doubleside lapping, the bow in a silicon wafer was investigated theoretically as well as experimentally. Regarding the bow decreasing mechanism, the lapping rate and lapping plate rotation speed effects are discussed. The lapping rate depends on the pressure. Inequality between the lapping rate in the wafer center and that at the edge is brought about by the difference between the pressure applied at the wafer center and that at the edge. Bow can be decreased by such inequalities. Bow after lapping is expressed as exponential functions of initial thickness, plates rotation speed, wafer diameter and lapping rate. The obtained results are as follow: (1) With a decrease in the lapping rate, bow is decreased. (2) With an increase in the initial thickness, bow is decreased. (3) A convex wafer surface should be lapped with the plate which turns faster than the other with respect to the relative speed between wafer and plate.View full abstractDownload PDF (1229K) -
Takeshi FURUHASHI, Nobuyoshi MORITA1983 Volume 49 Issue 11 Pages 1555-1560
Published: November 05, 1983
Released on J-STAGE: July 23, 2009
JOURNAL FREE ACCESSLarge fluctuating forces act on joints of high speed link mechanisms. The lubrication of the joints moving in space may be poor conditions as compared with the joints fixed on the base. The present paper deals with the abrasion of pairing elements assembled at the crank-pin joint of a crank lever mechanism. The observed experimental results by an abrasion test are discussed from the dynamic forces of the link mechanism with clearances at the joint. The directions of especially increasing abrasion and the mechanism occurring the abrasion on the pairing elements are analytically made clear from the dynamics of mechanism.View full abstractDownload PDF (1001K) -
Yoichi SHIGEMATSU, Yukinori KAKAZU, Norio OKINO1983 Volume 49 Issue 11 Pages 1561-1566
Published: November 05, 1983
Released on J-STAGE: July 23, 2009
JOURNAL FREE ACCESSAn interference detection problem among solids in a CAD/CAM system is considered analytically by means of the simplex method. This idea deals directly with the half spaces defining the geometric models, which is appropriate for the constructive solid geometry. The simplex method is applied to a linear inequalities system defining the intersection of two convex polyhedra from two solids in question. Thus an approximation of each solid to a union of convex polyhedra is required. The method makes the followings possible: (1) to check the interference between two convex polyhedra just by manipulating a corresponding matrix, (2) to check the separation at the beginning of the algorithm, (3) to calculate optimally by the simplex criterion, (4) to calculate necessary points for the detection systematically. The implementation indicates that the method functioned well when two polyhedra interpenetrate or separate more than 10-4. The cases of interpenetration and separation less than 10-6 malfunctioned, which is due to the error propagation in the successive calculations of a matrix in the simplex method.View full abstractDownload PDF (1094K) -
Yoshikuni NAKANO, Hideo KATO1983 Volume 49 Issue 11 Pages 1567-1571
Published: November 05, 1983
Released on J-STAGE: July 23, 2009
JOURNAL FREE ACCESSA new method is presented by which the profiles of relief grinding wheels of gear cutting tools with arbitrary contours can be numerically calculated without solving transcendental equations as done usually. The proposed method is based on iterating the successive approximation until the wheel profile converges to one with a certain desired accuracy. A method is also described by which the correctness of the calculated grinding wheel profiles can be examined. Finally it is confirmed by calculation that the relief grinding wheel profiles of gear cutting tools can be determined easily and precisely by these methods.View full abstractDownload PDF (903K) -
Masaharu TAKANO, Shiro TANI, Hirotoshi YONEZAWA1983 Volume 49 Issue 11 Pages 1572-1577
Published: November 05, 1983
Released on J-STAGE: July 23, 2009
JOURNAL FREE ACCESSNew type of mobile robot TO-ROVER developed here has the feature that it can not only run on flat floor but go up and down stairs, go over obstacles and turn in narrow space, controlled by a micro-computer with simple control procedure. The mechanism of TO-ROVER consists of two pairs of three arms which rotate for going up and down, wheels at the end of each arm for running and turning, and mechanism to bend the arm-wheel drive units for shortening its length. Experiments show the stable motion of automatic going up and down stairs or going over obstacles. Some suggestions for practical design of TO-ROVER are proposed.View full abstractDownload PDF (1196K) -
Muneharu MOROZUMI, Koro YAEJIMA1983 Volume 49 Issue 11 Pages 1578-1582
Published: November 05, 1983
Released on J-STAGE: July 23, 2009
JOURNAL FREE ACCESSThe present paper deals with the formulas to calculate the pitch diameters or the radial measurement over one ball of the internal triangular screw thread, which have one or multi-start threads and large lead angles, in measuring internal screw threads by over-ball method. Furthermore the best measuring ball diameters which contact in the pitch diameter of internal screw thread are calculated. The approximate formula to calculate the pitch diameter of internal triangular screw thread with high accuracy without using the trial-and-error method is obtained, and the accuracy of the approximate formula is discussed.View full abstractDownload PDF (735K) -
[in Japanese]1983 Volume 49 Issue 11 Pages 1583-1586
Published: November 05, 1983
Released on J-STAGE: July 23, 2009
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