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Volume 58, Issue 10
Displaying 1-25 of 25 articles from this issue
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Kuniko INOUE, Yoshitaka MIYAZAKI1992 Volume 58 Issue 10 Pages 1629-1632
Published: 1992
Released on J-STAGE: October 08, 2009
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Norio KODAIRA1992 Volume 58 Issue 10 Pages 1633-1638
Published: 1992
Released on J-STAGE: October 08, 2009
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Shunji MOHRI1992 Volume 58 Issue 10 Pages 1639-1641
Published: 1992
Released on J-STAGE: October 08, 2009
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Hideyuki WAKAI1992 Volume 58 Issue 10 Pages 1642-1644
Published: 1992
Released on J-STAGE: October 08, 2009
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Hideyuki TOKUDA1992 Volume 58 Issue 10 Pages 1645-1648
Published: 1992
Released on J-STAGE: October 08, 2009
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Masayuki TAKATA1992 Volume 58 Issue 10 Pages 1649-1651
Published: 1992
Released on J-STAGE: October 08, 2009
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Ichiro INOUE1992 Volume 58 Issue 10 Pages 1652-1655
Published: 1992
Released on J-STAGE: October 08, 2009
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Eiji ARAI1992 Volume 58 Issue 10 Pages 1656-1659
Published: 1992
Released on J-STAGE: October 08, 2009
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Mikio HONGO, Shuzo SANO, Takashi KAMIMURA, Katsuro MIZUKOSHI1992 Volume 58 Issue 10 Pages 1661-1666
Published: 1992
Released on J-STAGE: October 08, 2009
JOURNAL FREE ACCESSThis paper describes the details of an on-chip interconnection system using pyrolytic decomposition of molybdenum hexacarbonyl irradiated with an argon ion laser beam. This system consists of five chambers (CVD, sputter deposition, sputter etching, transportion and load-lock chambers). The system has the ability not only to form molybdenum conductors by laserinduced CVD but also to form chromium film as a barrier by sputter deposition, remove chromium film by sputter etching and reduce resistivity of molybdenum conductors by laser annealing. After the contact holes are formed on LSI chips by the focused ion beam (FIB) system. LSI chips are transported to this system in a vacuum using the container attached to a vacuum pump system and gate valve. The process to make interconnects can be carried out all the way through without exposure to the air. With this system and process, low resistive contacts and low resistive conductors for failure analysis or modification can be obtained and the development time of LSIs and electronic systems using LSIs can be shortened.View full abstractDownload PDF (4243K) -
Hiroyuki OKAMOTO, Yoh YONEZAWA1992 Volume 58 Issue 10 Pages 1667-1671
Published: 1992
Released on J-STAGE: October 08, 2009
JOURNAL FREE ACCESSThis paper describes a design and trial construction of the welded-nut position inspection system which applies gray-scale image processing. The inspection is made as follows : 1st, define two square inspection areas which enclose a nut (= object) image. These two areas have a common center and different area sizes to each other. 2nd, calculate a standard density level by using 5 densities of pixels around the center. 3rd, count the number of pixels which density levels are lower than the standard one, in each area. 4th, judge the quality of the work by the difference between the counts at large area and that at small area. It is clarified by experiments at an industry that the system inspected with no error and with about 15 ms/object processing speed.View full abstractDownload PDF (6097K) -
Nobuhiro NOTO, Kintaro MORI1992 Volume 58 Issue 10 Pages 1672-1678
Published: 1992
Released on J-STAGE: October 08, 2009
JOURNAL FREE ACCESSA direct current arc discharge plasma jet Chemical Vapor Depositon (CVD) method has achieved very high growth rates of diamond by spraying a plasma jet onto a water-cooled substrate. The initial, experimental scale diamond films thus synthesized on a substrate were small in area, less than 10 mm in diameter. A large area of diamond film formed with a high growth rate is presupposed to be required, but this only has partially been obtained. By rotating a tungsten, substrate during spraying, the area of diamond deposited on the substrate was observed to be about 4 times as large as that on a fixed tungsten substrate. Raman spectroscopy determined the diamond obtained by this method included a small quantity of amorphous carbon. However, diamond Raman spectra obtained from within the diamond indicated the diamond had a diameter of about 20 mm. More recently, a diamond film that has a diameter of about 30 mm has been obtained by rotating the substrate while moving it horizontally.View full abstractDownload PDF (7771K) -
Effect of Magnetic Field on Stock Removal and Grinding ForceKazuo KUMAGAI, Osamu KAMIYA, Takeshi MORITA1992 Volume 58 Issue 10 Pages 1679-1684
Published: 1992
Released on J-STAGE: October 08, 2009
JOURNAL FREE ACCESSThe grinding tests were performed in the magnetic field by using the ferromagnetic materials of Ni, S45C and SUS430 steels. The stock removal and the grinding force increase by 5-21% and 3-9% respectively when the workpieces are magnetized up to 16mT by the alternating current. The rate of increase of the stock removal is greater in cases of smaller load on the workpiece, larger size of the abrasive grain and slower grinding speed. Those effects are more remarkable in case of the SiC abrasive grain rather than the Al2O3 grain. The increase in stock removal is assumed to be caused by the increase in the movable dislocations which are brought about the interaction between the dislocations and the vibrating magnetic-domain-walls as well as by the ΔE effect.View full abstractDownload PDF (1084K) -
Kazuhiro SHINTANI, Hideharu KATO, Takao MAEDA, Yoshio FUJIMURA, Akira ...1992 Volume 58 Issue 10 Pages 1685-1690
Published: 1992
Released on J-STAGE: October 08, 2009
JOURNAL FREE ACCESSCutting performance of CBN tool for the turning of nickel based superalloy (Inconel 718) which is known as one of the difficult to machine materials has been investigated. It was clarified through the microscopic observation of tool-tip after cutting that adhering of the workpiece material to the tool tip occurred and the adhesion affected significantly on the tool life. The type of tool wear varied with cutting speed. Reaction between the workpiece and tool materials was also investigated through a simulated experiment in which both materials were attached with clump and heated up to 1 473 K. Then, the vicinity of the reaction couple was examined carefully by EPMA EDX and AES. Mutual diffusion between the binder phase of the CBN tool and workpiece was observed. Apparently, it could be concluded that such kind of material transfer promoted the tool wear.View full abstractDownload PDF (10177K) -
Operation Planning in Interrupted Cutting Using Tool Failure Evaluation SystemTakashi MATSUMURA, Toshiyuki OBIKAWA, Takahiro SHIRAKASHI, Eiji USUI1992 Volume 58 Issue 10 Pages 1691-1696
Published: 1992
Released on J-STAGE: October 08, 2009
JOURNAL FREE ACCESSIt is difficult to select the optimum cutting conditions in interrupted cutting because there is no standard for tool exchange. This paper describes a machining operation planning for selecting them using tool failure evaluation system. In the system, life distribution of brittle tool is predicted quickly by neural network, and the prediction error is estimated as one-sided interval at 90% confidence level. Then combination of optimum cutting conditions and tool exchange cycle is selected so as to minimize the expected machining cost or time for given work material and cutting operation. The presented approach in this paper is applicable to various machine shops.View full abstractDownload PDF (1146K) -
Shizuichi HIGUCHI, Shigeru AKAO, Yoshio SAITO, Tadaaki HANAOKA1992 Volume 58 Issue 10 Pages 1697-1703
Published: 1992
Released on J-STAGE: October 08, 2009
JOURNAL FREE ACCESSMany types of lapping films are manufactured today. This is because they greatly improve the finishing process and reduce the finishing costs. However, the effects of the structural characteristics of lapping films and the elastic contact conditions between contact roll and workpiece on the performance of finishing have not yet been fully explained. In this study, finishing of cylindrical workpiece surfaces were carried out with different contact pressures applied to the workpiece surfaces and with rubber contact rolls of different hardness, using lapping films of different backing thickness and grain sizes. As a result, the effects of them on the finished surface roughness, the ground amount and the accuracy of their forms were clearly recognized. And useful suggestions were obtained for implementing the lapping film finishing effectively.View full abstractDownload PDF (1097K) -
[in Japanese], [in Japanese], [in Japanese]1992 Volume 58 Issue 10 Pages 1704-1706
Published: 1992
Released on J-STAGE: October 08, 2009
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A Method of Additional LearningTakao YONEDA, Masashi YAMANAKA, Yukinori KAKAZU1992 Volume 58 Issue 10 Pages 1707-1712
Published: 1992
Released on J-STAGE: October 08, 2009
JOURNAL FREE ACCESSAn autonomous mechanical system with learning function, possessing capabilities for self-modification on the basis of empirically acquired knowledge and operating ability, was devised and implemented using a neural networks for the preparatory process in grinding operations. Applying above system, newly generated datum is acquired and successive additional learning is necessary. Formerly, in order to cope with this need, learning was repeated using all data, including the additional data. However restricted computational load and memory capacity required for learning increases vastly. Accordingly, this paper deals with a method whereby only recently acquired data and additional data, are learned, while the knowledge acquired through previous learning is preserved. Procedures were devised as follows. If the memory capacity is exceeded, then the datum with the greatest degree of similarity to the additional data is excluded from the memory and replaced, and clustering is employed for data compression in the memory area. In simulation experiments using random numbers, the present methods were compared with method such that the oldest datum was excluded from the memory area and additional learning is performed, and the results demonstrated that the present method decreases recall erros apprpximately one-half.View full abstractDownload PDF (1059K) -
Takeshi MASUDA, Fujio YAMAGUCHI1992 Volume 58 Issue 10 Pages 1713-1720
Published: 1992
Released on J-STAGE: October 08, 2009
JOURNAL FREE ACCESSThis paper describes a method of reconstructing a polyhedron from orthographic views. First, a wire frame model is created. This is achieved by referring to the corresponding relationship among three orthographic views. Then a surface model is generated by making loops out of coplanar edges. Such a surface model consists of ghost figures. This paper deals with the ghost figure eliminating procedure as determination of flags, flags referring to nodes in the constraint relationship network. The flag of each node in this network represent true, false or undecided. With this approach, many rules in consistency checking and local value propagation are systematically organized, and the consistency managing procedure is completely isolated from the search procedure. As a result, the systematic rules can be adopted at any time in the search process when needed. The method implemented in this paper shows the way to use consistency checking and local value propagation effectively.View full abstractDownload PDF (1578K) -
Top-Down Processing Based on the Structural Model for Mechanical DrawingsKatsuhiro KITAJIMA, Mitsunobu SUWA, Takao IWATANI1992 Volume 58 Issue 10 Pages 1721-1727
Published: 1992
Released on J-STAGE: October 08, 2009
JOURNAL FREE ACCESSThis paper presents a 2-D structural model for mechanical drawings and top-down recognition processing based on it. The structural model is composed of an attribute representation model which represents geometrical attributes of drawing elements and a relationship representaion model which represents latent relations between them. Both play important roles not only in top-down processing but also later in a highly-functional 2-D CAD system, which the recognition system is focusing on as a target of its application. The authors first propose the configuration of this model and then the method of top-down processing, which includes the modification of misrecognition, the fixation of unseparated elements in bottom-up processing and the method of automatically generating the relationship representation model from the input attribute representation model. All these processing are done based on the production rules which is composed of both JIS drawing rules and tacit understandings. Some examples are finally shown.View full abstractDownload PDF (1330K) -
Takemasa Hanada, Tetsutaro Hoshi1992 Volume 58 Issue 10 Pages 1728-1734
Published: 1992
Released on J-STAGE: October 08, 2009
JOURNAL FREE ACCESSFor the purpose of fully automating the transformation of CAD designed product data into the information necessary for machining the product, a new method of Machining Feature-Based CAD/CAM has been investigated. By modifying the existing Parametric Feature-Based CAD methodology into one using only geometrical features machinable by defined cutting technologies, a Machining Feature-Based CAD system has been developed, by which it is possible to fully automate the processing of the succeeding CAM tasks for fabrication of block-like components. The CAD/CAM system has demonstrated a future possibility of highly automating production of low volume high product-mix items of block-like components which fall into a sub-set class of prismatics.View full abstractDownload PDF (5978K) -
Analysis by Power Spectral Density FunctionNoriaki ITOH, Tadao TSUKADA, Kazuyuki SASAJIMA1992 Volume 58 Issue 10 Pages 1735-1740
Published: 1992
Released on J-STAGE: October 08, 2009
JOURNAL FREE ACCESSMicro-irregularities of machined surface are classified into three regions by means of power spectral density function. The first region is made of longer wave which is called waviness or form errors. The second shows fractal-like property and the third contains simple form asperities only. This report presents that these characteristics are shown more clearly by the power spectaral density function than the structure function. From these characteristics, this report recommends a cut-off value of low pass filter for waviness and an optimum sampling interval for digitiziing data.View full abstractDownload PDF (860K) -
Hisashi TAKAHASHI1992 Volume 58 Issue 10 Pages 1741-1746
Published: 1992
Released on J-STAGE: October 08, 2009
JOURNAL FREE ACCESSThis paper deals with a feedforward-control method of the armature current for a DC servomotor driven in a PWM mode. The armature current is computed using a DSP based full digital circuit from motor parameters (armature resistance, back emf constant, and inertia), speed and drive circuit impedance without current feedback. The PWM ratio, which is given in reference to the current command, is calculated using the computed armature current. A computing block, which is referred in the paper as an estimation unit, is incorporated to estimate the sum of the armature resistance and the output resistance of the drive circuit, which are both very sensitive to temperature. By this method, the armature current can be adjusted much closer to the current command compared to a system without an estimation unit. The conclusions are (1) accurate PWM ratio commands can be obtained using the computed value of the armature current without real current feedback, (2) by incorporating the estimation unit, the accuracy of the control system is increased, and (3) this technique can be applied to the designing of full digital LSI's for motor controls.View full abstractDownload PDF (1144K) -
Allowable Load on JointsHirokazu TSUJI, Masahiro SUZUKI, Osamu MUTO, Kazuo MARUYAMA1992 Volume 58 Issue 10 Pages 1747-1752
Published: 1992
Released on J-STAGE: October 08, 2009
JOURNAL FREE ACCESSThe allowable load on bolted joints tightened in the plastic region is studied experimentally. Behavior of the joints are investigated in different tightening region of the bolt such as elastic region, yield point and plastic region, varying stiffness of clamped parts and the strength grade of the bolt. As a result, it is shown that the additional elastic increase in the axial tension of the bolt under external load is independent of the joints stiffness or the elongation of the bolt at tightening. Load capacity of the joints tightened in plastic region is higher than that in elastic region by 5-10%. Permitting the decrease of initial clamping force by 10%, the allowable load is 90% of the yield strength of the bolt for the joint having lower stiffness, and is equal to the yield strength for one having higher stiffness. The allowable load estimated in the joint (load cell) whose stiffness is lower than actual condition is in safety zone.View full abstractDownload PDF (1040K) -
Yoshio KAWAMURA, Hiroyuki KOHIDA, Shinji TANAKA, Kenko UCHIDA1992 Volume 58 Issue 10 Pages 1753-1758
Published: 1992
Released on J-STAGE: October 08, 2009
JOURNAL FREE ACCESSIncreasing the efficiency of hybrid generation of biological cell using a fusion apparatus requires a large number of viable protoplasts, which are classified beforehand from suspension-included viable and disintegrated biological cells. A cytometric classifier has been developed for protoplasts whose diameters are more than about ten micrometers. This paper introduces a new classification method. Protoplasts are supplied through a sheath flow in a flow cell and their images are focused on four slits arranged at different angles to streamline and scan the moving images relatively. Through these slits, three direction length of a protoplast are measured and the protoplast is classified. The classified protoplasts are sorted into microchambers in isotonic solution. Cytometric resolution of the present classifier is ±10 μm. From the experimental result, knowledge is obtained on the improvement of cytometric resolution and classifying efficiency.View full abstractDownload PDF (4604K) -
Motion Characteristics with Enhanced FrictionToshiro HIGUCHI, Yutaka YAMAGATA1992 Volume 58 Issue 10 Pages 1759-1764
Published: 1992
Released on J-STAGE: October 08, 2009
JOURNAL FREE ACCESSA micro-positioning mechanism (Impact Drive Mechanism) which utilizes impulsive reaction force caused by rapid deformations of piezoelectric elements has been developed as reported earlier. It has micro motion ability from nanometers up to practically unlimited range and is based on dry friction resulting from the reaction force to gravity. In this report, a new type is presented, which uses magnetically enhanced friction force. A driving control scheme for the piezos has been developed for this improved actuator. The load capacity of the actuator has thus been increased significantly. At the same time, robustness to vibration and disturbance has improved, as well as the maximum speed. The new actuator is able to climb up a vertical surface and its maximum speed is 9.5mm/s, a factor of 10 or more compared to the earlier design.View full abstractDownload PDF (970K)
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