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[in Japanese]
1986 Volume 52 Issue 5 Pages
768-769
Published: May 05, 1986
Released on J-STAGE: June 30, 2009
JOURNAL
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[in Japanese]
1986 Volume 52 Issue 5 Pages
770-773
Published: May 05, 1986
Released on J-STAGE: June 30, 2009
JOURNAL
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[in Japanese]
1986 Volume 52 Issue 5 Pages
774-778
Published: May 05, 1986
Released on J-STAGE: June 30, 2009
JOURNAL
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[in Japanese]
1986 Volume 52 Issue 5 Pages
779-782
Published: May 05, 1986
Released on J-STAGE: June 30, 2009
JOURNAL
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[in Japanese]
1986 Volume 52 Issue 5 Pages
783-786
Published: May 05, 1986
Released on J-STAGE: June 30, 2009
JOURNAL
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[in Japanese]
1986 Volume 52 Issue 5 Pages
787-790
Published: May 05, 1986
Released on J-STAGE: February 16, 2010
JOURNAL
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[in Japanese]
1986 Volume 52 Issue 5 Pages
791-793
Published: May 05, 1986
Released on J-STAGE: June 30, 2009
JOURNAL
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[in Japanese]
1986 Volume 52 Issue 5 Pages
794-797
Published: May 05, 1986
Released on J-STAGE: February 16, 2010
JOURNAL
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[in Japanese]
1986 Volume 52 Issue 5 Pages
798-800
Published: May 05, 1986
Released on J-STAGE: June 30, 2009
JOURNAL
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[in Japanese]
1986 Volume 52 Issue 5 Pages
801-804
Published: May 05, 1986
Released on J-STAGE: June 30, 2009
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[in Japanese], [in Japanese], [in Japanese]
1986 Volume 52 Issue 5 Pages
805-807
Published: May 05, 1986
Released on J-STAGE: June 30, 2009
JOURNAL
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[in Japanese]
1986 Volume 52 Issue 5 Pages
808-810
Published: May 05, 1986
Released on J-STAGE: June 30, 2009
JOURNAL
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[in Japanese]
1986 Volume 52 Issue 5 Pages
811-814
Published: May 05, 1986
Released on J-STAGE: June 30, 2009
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Kenzi OISHI, Tomohiko ONO, Shin-ichi MIYAZAWA
1986 Volume 52 Issue 5 Pages
819-825
Published: May 05, 1986
Released on J-STAGE: June 30, 2009
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Groove wear is formed on both sides of tool-chip contact area when stainless steel (SUS 304) is turned by cubic boron nitride cutting tool in relatively low cutting speed and feed, and differs from crater wear in shape. The purposes of this paper are to clarify the relation between groove wear and physical properties of tool, work material and ambient gases experimentally and to investigate the mechanism of groove wear formation based on the experimental results. The main findings are as follows. (1) Chip is deformed extremely in convex shape on tool rake face at low feed rate, and this makes both sides of chip easier to contact to rake face than that of central part. (2) Groove wear formation is affected by the adhesion between tool and work material. The formation is accelerated by applying argon gas to the cutting point, and controlled by oxygen gas. This tendency is stressed as the increase of Ni content in work material. (3) Considerable amount of tool material is removed from both sides of tool-chip contact area in a short period. This phnomenon is confirmed through the analysis of SEM and EPMA
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Iwao HAYASHI, Teru HAYASHI, Katsuya KASHIWAGI, Shoichiro NOMURA, Kenji ...
1986 Volume 52 Issue 5 Pages
826-831
Published: May 05, 1986
Released on J-STAGE: June 30, 2009
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The pressure for molding and its influence on the electrostrictive characteristics of PMN ceramics, and the sintering deformation of the cylinder made from the ceramics are studied. The ceramics cylinders will be used as raw materials of the active high rigid bearings of the gear rolling tester which authors intend to construct. The followings are obtained: (1) The good density and the good electrostrictive characteristics are obtained under the pressure lower than 45% of the limit pressure at which some cracks appear in the ceramics cylinder pushed out of a mold. (2) The formulae which can describe the shrinking deformation of ceramics cylinder are obtained under the assumption of the elastic deformation of ceramics cylinder. (3) The shrinking deformation is controlled by using the cylinder base of the same material as expected from the studies with the formulae.
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Shizuichi HIGUCHI, Tadaaki HANAOKA
1986 Volume 52 Issue 5 Pages
832-837
Published: May 05, 1986
Released on J-STAGE: June 30, 2009
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In abrasive belt grinding, the elastic deformation of rubber contact wheel is the cause of residual depth of cut and the recovering of elastic deformation generates an excessive depth of cut at retraction stage. In this study, the cumulative actual depth of cut with the grinding time were measured, in plunge belt grinding. And also, the transient state of the grinding process was theoretically investigated. As a result of that, the amount of residual depth of cut and excessive depth of cut were explained in the case of varying the grinding conditions. Moreover, an infeed control was proposed to decrease the grinding time and dimensional error of workpieces. The proposed infeed control offered a basic indication of the efficient and accurate belt grinding.
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Yuichi USUI, Okitsugu SAKATA
1986 Volume 52 Issue 5 Pages
838-844
Published: May 05, 1986
Released on J-STAGE: June 30, 2009
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Vibrational damping characteristics of beams, which are made of steel plates sandwiching epoxy based adhesive and visco-elastic material, are examined theoretically and experimentally. The damping characteristics of the sandwich beams change with variation of the beam dimensions and the properties of sandwiched adhesive. For example, when epoxy adhesive is used, the damping ratio of the beam becomes higher as the adhesive layer gets thicker and the resonant frequency of the beam is higher. And it becomes clear that the high damping beams can be obtained by using adhesive with suitable properties and controlling adhesive thickness.In addition, the sandwich structure is applied to boring bars, and excellent damping tools are obtained.
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Masaichi TATSUMI, Iwao HAYASHI, Teru HAYASHI, Kenji UCHINO
1986 Volume 52 Issue 5 Pages
845-850
Published: May 05, 1986
Released on J-STAGE: June 30, 2009
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Some actuators made from piezoelectric ceramics are recently used in high precision X-Y tables for manufacturing semiconductors. However, it is very difficult to control the table movement with the high accuracy and high reproducibility of sub-micron order, because the piezoelectric ceramics such as PZT have a peculiar hysteresis. For the materials of microdisplacement actuators, one of the electrostrictive ceramics, PMN (Pb(Mg
1/3 Nb
2/3)O
3 -based ceramics), is more preferable than the other piezoelectric ceramics, because it generates large strains up to 10
-3, has the small hysteresis and Young's modulus equal to 1/2 times the steel one. However, the PMN ceramics has a defect that the induced electrostrictive strain becomes very small if an impurity-pyrochlore structure appears in the sintered PMN. So the sintering methods have been researched to obtain the pure PMN material. The authors tried some sintering methods to reduce the hysteresis of the PMN material as much as possible. As the results, the followings are obtained:(1) There are the interesting relations among the impuritypyrochlore structure, the electrostrictive strain and the hysteresis.(2) It is found a sintering method by which the hysteresis is much reduced, though the electrostrictive strain also becomes only a little.
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On Process Principle and a Few Finishing Characteristics
Takeo SHINMURA, Koya TAKAZAWA, Eiju HATANO
1986 Volume 52 Issue 5 Pages
851-857
Published: May 05, 1986
Released on J-STAGE: June 30, 2009
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This paper describes the process principle and a few finishing characteristics of the magneticabrasive finishing in which susceptive abrasives magnetically (magnetic-abrasives so called) made of iron and alumina particles are used. It is found experimentally by a model test that the magnetic-abrasive pressure is introduced by magnetic field strength and its measured value reaches at the conventional lapping pressure one. These experimental results are discussed analytically. The experiments showed that a cylindrical workpiece is finished smoothly in a short machining time from the unmachined surface roughness value of about 1.5 μmR
max to the machined value of submicron. Magnetic-abrasive finishing process reported in this paper will be used in practice.
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Chip Breaking Mechanism of a Chip Breaker Applicable to Wide Range of Feed Rate and Depth of Cut
Yoshio HASEGAWA, Shinsaku HANASAKI, Junsuke FUJIWARA, Tadahiro WADA
1986 Volume 52 Issue 5 Pages
858-863
Published: May 05, 1986
Released on J-STAGE: June 30, 2009
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A circular cylinder of SS41 was turned with a new chip breaker, which breaks the long chip under the cutting conditions of cutting speed of 3.0 m/s, depth of cut from 0.1 mm to 3.0 mm and feed rate from 0.05 mm/rev to 0.51 mm/rev. The situations of the chip flow and the chip breaking were taken photos with a high speed camera, and they were analyzed. The mode of the chip breaking is divided into six types according to cutting condition. Each part of this chip breaker has an effect on these types of chip breaking. That is : This chip breaker forces the chip to flow in a certain path not only at up curling but also at side curling, that causes the chip to break. A step on the face perpendicular to the major cutting edge makes the second moment of area of the chip large at comparatively large depth of cut and low feed rate, that makes the strain in the bent chip large and causes the chip to break.
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[in Japanese], [in Japanese], [in Japanese], [in Japanese], [in Japane ...
1986 Volume 52 Issue 5 Pages
864-866,905
Published: May 05, 1986
Released on J-STAGE: June 30, 2009
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Interactive Geometric Modeling
Suguru SAWAI, Shinichi KATAYAMA, Norio OKINO, Yukinori KAKAZU
1986 Volume 52 Issue 5 Pages
867-873
Published: May 05, 1986
Released on J-STAGE: June 30, 2009
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The mold design system SMDS which was presented at the first report has conversational functions to build up a mold object. This paper describes the method of building up a 3-dimensional object by interactive operations in SMDS. The concept of geometric modeling in this system is based on solid modeler TIPS-1 system. In the TIPS-1 system, 3-dimensional shape is described by TIPS-1 shape description language and represented by set operations of several segments. And geometric data are generated by batch process. In this paper, a theoretical approach to the interactive object modeling is discussed. Secondly, the algorithms are described that realize the interactive object modeling and also output shaded pictures of the object on a raster-scan display. And some results of shaded pictures are presented.
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Nobuyuki OKUBO, Takayasu FURUKAWA
1986 Volume 52 Issue 5 Pages
874-879
Published: May 05, 1986
Released on J-STAGE: June 30, 2009
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For experimental building block approach or substructuring in dynamic design, the measurement of rigid body modes of each component of the structure in free-free state is required. The rigid body modes influence much the level of total response after assembling the components. This paper first describes the necessity of such rigid body modes in building block approach by using a numerical simulation. By taking into account the rigid body motion of a component in free-free state analytically, the method is developed to determine the location of the center of gravity, the moment of inertia around each principal axis based on measured level of frequency response function in low frequency range. The computer program developed is applied to a simple beam structure to confirm that the correct rigid body modes can be obtained. For a complex structure, the rigid body modes of a engine whose geometry is very complex are appropriately determined by the method proposed.
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Vibration Isolation for Random Disturbance
Teruo TAKAGAMI, Yasuo JIMBO
1986 Volume 52 Issue 5 Pages
880-886
Published: May 05, 1986
Released on J-STAGE: June 30, 2009
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In previous papers, active vibration isolation systems are presented for deterministic disturbances. In this paper, it is shown that the system is also effective for random disturbances. For sine form disturbances optimum damping depends on the amplitude of disturbance vibrations. For random disturbances it is found that the same amount of damping becomes optimum by using an amplitude of the equivalent sine form vibrations which have same energy with that of the random vibrations. Optimum control gains are obtained through the same procedures as those of the previous papers. Delicate adjustments of those gains are made with the aid of micro computers.
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Satoshi KISHI, Muneharu MOROZUMI, Yoshitaro YOSHIDA
1986 Volume 52 Issue 5 Pages
887-893
Published: May 05, 1986
Released on J-STAGE: June 30, 2009
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A precise analysis has been made of the problem of interference involved in cutting an internal ball screw with the rotary cutter whose axis is parallel to that of the screw. Firstly, the process of interference, which occurs around the minor diameter of the internal ball screw, is discussed. Secondly, a calculation method is shown. This is to calculate the critical diameter of the cutter with which the interference can be eliminated. Then the design drawing and the experimental manufacture of a rotary cutter is made for a numerical example of an internal ball screw. Finally, the theory is verified by practical cutting of an internal ball screw with the rotary cutter.
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Zenichi MIYAGI, Kentaro YAMAMOTO
1986 Volume 52 Issue 5 Pages
894-899
Published: May 05, 1986
Released on J-STAGE: June 30, 2009
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A new tester to measure micro shearing slippage of the tape is developed, in which an LVDT is used to measure the slippage at 1 or 0.1 μm a digit. By the tester not only the slippage under the application of shearing force but also the recovering slippage after the force is removed can be measured. Shearing and recovering slippage of a polyester tape coated with adhesive of polyacrilic acidester is measured under the following conditions : 0.98 N {100 gf} in shearing force, 0, 20, 40 and 60 min in leaving time, 30 min both in loading and recovering time, and 23 ± 0.5°C and 65 ± 5% RH in atmospheric condition. The results of the experiments and the analyses are concluded briefly as followes : (1) Combination of two Voigt units is effectively adapted for both of the cohesive and boundary slip. (2) The coefficients of the Voigt units in cohesive slip are kept constant throughout the applied leaving time. (3) The coefficients of the Voigt units of boundary slip in short leaving time show higher transient effect and larger terminal velocity of slip, but in the leaving time of 40 min little transient effect is observed, and in the leaving time of 60 min no boundary slip is recognized.
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Yasuhiko ARAI, Keizo AWA, Tadao KURATA
1986 Volume 52 Issue 5 Pages
900-904
Published: May 05, 1986
Released on J-STAGE: June 30, 2009
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This paper describes an automatic decidable method of absolute sequence numbers of fringes that have been thought as the complicated problems in the automatic 3-dimensional measurement system with moiré topography. In the method, a system of the scanning moiré topography is constituted theoretically with two TV-cameras and a projector. By comparing with two pictures generated by two TV-cameras, the original fringe can be extracted logically in the picture. Then, absolute sequence number of original fringe becomes zero. Furthermore, with this result and the relative sequence numbers of fringes given by uphill or downhill judgement, the absolute sequence numbers of fringes can be determined automatically with regard to every fringe. The results show that the method is useful for the complex configuration. It may be concluded that the method accelerates the progress of the automatic 3-dimensional measurement system with moiré topography.
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