巻号一覧
65 巻, 4 号
選択された号の論文の24件中1～24を表示しています
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土肥 健純1999 年 65 巻 4 号 p. 489-492
発行日: 1999/04/05
公開日: 2009/04/10
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奥田 慶一郎1999 年 65 巻 4 号 p. 493-496
発行日: 1999/04/05
公開日: 2009/04/10
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高齢障害者の生活支援機器について田中 理1999 年 65 巻 4 号 p. 497-500
発行日: 1999/04/05
公開日: 2009/04/10
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藤江 正克, 根本 泰弘, 土肥 健純, 佐久間 一郎1999 年 65 巻 4 号 p. 501-506
発行日: 1999/04/05
公開日: 2009/04/10
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手嶋 教之1999 年 65 巻 4 号 p. 507-511
発行日: 1999/04/05
公開日: 2009/04/10
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松本 博志, 菅原 明彦1999 年 65 巻 4 号 p. 512-516
発行日: 1999/04/05
公開日: 2009/04/10
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高橋 儀平1999 年 65 巻 4 号 p. 517-523
発行日: 1999/04/05
公開日: 2009/04/10
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長坂 一郎, 田浦 俊春1999 年 65 巻 4 号 p. 525-531
発行日: 1999/04/05
公開日: 2009/04/10
ジャーナル フリーIn this paper, the design of spatial shapes of function carriers and the spatial layout is called a spatial design. In it such design processes as constraint satisfaction are considered. In general, since the constraint satisfaction problem in spatial design can often be very difficult to solve because of a lack of constraints and countless combinations of the layout, a variety of solutions which satisfy constraints should be allowed. Therefore, in order to allow such variety, the notion of developmental processes in biology was applied and adaptive-growth-type 3D geometric representation based on evolutionary algorithms was proposed. Here, the adaptive-growth type means the shape expressed in the process, which develops through interaction with an outside environment, like shape generation of a living organism in the natural world. Finally, the representation was verified by applying it to the component layout problem in the early stage of satellite design.抄録全体を表示PDF形式でダウンロード (3054K) -
加賀美 亮, 古川 進1999 年 65 巻 4 号 p. 532-536
発行日: 1999/04/05
公開日: 2009/04/10
ジャーナル フリーIt is required to consider efficiencies of distribution of luggages when a factory is designed or a job scheduling is made. Various simulation methods for checking efficiencies of transporting luggages have been developed. However, designers have to analyze the results by themselves whether the design or the scheduling is acceptable or not. A new simulation method with a function for detecting problems in the design or the scheduling is presented. This method consists of the following three procedures. (1) Obtaining a result by a conventional simulation method (e.g. discrete event simulation method). (2) Simulating by the new simulation method named Time-Skipping method. (3) Comparing those two results. If there are differences between them, some problems exist in the design or the scheduling. Two types of conveyor systems for transporting luggages have been tested by using this new simulation method. The results show that this new Time-Skipping method can be used for evaluating distribution systems and job scheduling.抄録全体を表示PDF形式でダウンロード (466K) -
接合面圧力の均一化大岩 孝彰, 太田 匠, 大久保 聡1999 年 65 巻 4 号 p. 537-541
発行日: 1999/04/05
公開日: 2009/04/10
ジャーナル フリーThe purpose of this study is to improve the stiffness of the bolted joint by means of uniforming the contact pressure distribution. Two plane surfaces of the conventional bolted joint have produced ununiformity of the contact pressure distribution and have caused decrease of the stiffness. In this paper, shape modification of bolted surfaces was performed in simulation by the finite element method and in experiments so that the pressure distribution is uniform. Moreover, grinding simulation by the finite element method estimated optimum grinding conditions for adopting a unique method to modify the surface. The measurements of the contact pressure between the modified plate and the plane base were performed and showed considerable decrease of the maximum pressure.抄録全体を表示PDF形式でダウンロード (493K) -
稲葉 善治, 松原 俊介, 上口 賢男1999 年 65 巻 4 号 p. 542-548
発行日: 1999/04/05
公開日: 2009/04/10
ジャーナル フリーAn injection molding machine contains a pressure control which is scarcely used on machine tools. Nothing is so precious as the characteristic of this pressure control for an injection molding machine, because it is directly traced to the quality of the molded components. For this reason, the development of the pressure control by a servomotor is indispensable for the achievement of the electrifier of the hydraulic injection molding machine to the injection molding machine with servomotors. Several pressure control systems with the servomotor have been proposed, however, the pressure control method in this article uses a conventional servo control method. Because position control and velocity control are simultaneously required to the injection molding machine to keep the safety operations. This article focuses on the pressure control characteristics and experimental results of each control group in servo control.抄録全体を表示PDF形式でダウンロード (3951K) -
下田 博一, 掛場 一直1999 年 65 巻 4 号 p. 549-553
発行日: 1999/04/05
公開日: 2009/04/10
ジャーナル フリーHelical beam couplings have one or more curved beams that extend from one end of the coupling to the other. The beam is in the shape of a helix, generated in a hollow cylinder. Parallel-offset, angular and axial misalignments between drive and driven shafts are absorbed by bending of the helical beam. Helical beam couplings are widely used in several types of rotating machinery since they can be manufactured with a specific torsional stiffness, shearing flexibility and wide range of torque capacities. In this paper transmission error and lateral load, which are transferred between the drive and driven shafts with combinations for arbitrary parallel-offset and angular misalignments, are measured. The influences of number of beams and manufacturing error of the shaft connecting hole on the transmission error and the lateral load are also analyzed respectively. The results may be summarized in the following. (1) Transmission error occured in the coupling with a double beam is considerably less than in the coupling with a single beam. (2) Experimental values of the transmission error generated by parallel-offset misalignment agree approximately with the theoretical results. (3) Changes in lateral load are due to the manufacturing error of the shaft connecting hole.抄録全体を表示PDF形式でダウンロード (2335K) -
静的特性武富 尚之, 境 久嘉, 吉本 成香1999 年 65 巻 4 号 p. 554-558
発行日: 1999/04/05
公開日: 2009/04/10
ジャーナル フリーA new type of aerostatic thrust bearing is proposed in order to get a high static stiffness. This bearing has a diaphragm and a chamber. Pressure acting upon the guide surface is transmitted into the chamber located at the back of the bearing, and deforms the diaphragm so as to compensate the change of the bearing clearance caused by the imposed load. Therefore, the support height of the bearing can be kept constant. The static characteristics of this bearing are affected by various design parameters, such as supply pressure and the thickness of diaphragm. The effects of these parameters are investigated theoretically and experimentally. The proposed bearing could get a very high stiffness under the proper design parameters.抄録全体を表示PDF形式でダウンロード (389K) -
ステップモータ駆動における振動負荷系の制御張 勤, 神谷 好承, 関 啓明, 疋津 正利1999 年 65 巻 4 号 p. 559-564
発行日: 1999/04/05
公開日: 2009/04/10
ジャーナル フリーNC (numerical control) techniques for driving the X-Y axes servo motors are widely used for the industrial machine tools such as lathe, milling machine, and so on. General NC techniques have not been able to control the angular displacement or angular velocity of the X-Y axes servo motors in the real time of motion. Therefore, it is impossible to reduce a residual vibration by use of the sensor feedback of the spring-mass load when the spring-mass load is driven by the NC controller. Here, in this study the new NC control method that can reduce the residual vibration by use of the sensor feedback of the load in the real time of motion is proposed. The new NC control method that is proposed in this study contains a V-F transformer that translates the analogue signal to the series of pulses in the loop of feedback, so the control system that is proposed in this study becomes nonlinear. Also the design method that can construct the system of real time sensor feedback in the new NC controller is verified.抄録全体を表示PDF形式でダウンロード (421K) -
中村 政俊, 後藤 聡, 古野 博明, 久良 修郭1999 年 65 巻 4 号 p. 565-569
発行日: 1999/04/05
公開日: 2009/04/10
ジャーナル フリーPerformance at high speed with high accuracy is required for contour control of industrial mechatronic servo systems. The torque saturation existing in the industrial mechatronic servo systems often causes deterioration of the contour control performance. In this paper, a measuring method of torque saturation characteristic for the mechatronic servo systems was proposed by comparing the ideal torque of the model and the actual measurements of torque of the servo systems. The proposed method was assured by experimental results of the actual mechatronic servo systems of DEC-I. By using the obtained torque characteristics, the contour control performance could be remarkably improved.抄録全体を表示PDF形式でダウンロード (523K) -
三宅 正二郎, 大竹 利明, 浅野 正志1999 年 65 巻 4 号 p. 570-574
発行日: 1999/04/05
公開日: 2009/04/10
ジャーナル フリーTo produce the 1nm deep-scale rulers, the lines and spaces and cross groove processing properties were investigated on layered crystalline muscovite mica using a silicon tip (less than 50nm radius). The following results were obtained. (1) Processing depth dependence on contact load and processing velocity were evaluated, and then the proper load and velocity conditions (1000nN, 5 μ m/s) to process 1nm depth grooves, corresponding to the basal planes, were obtained. (2) 1nm deep cross grooves were obtained by applying the proper load and velocity. (3) For the formation of lines and spaces, the interval pitch was minimized to 200nm. (4) Grooves with 1, 2, 3 and 4nm depth were processed by changing scanning cycles, under the proper load and velocity conditions. (5) From these results, cross grooves approximately one-nanometer deep at an interval of 200nm were produced.抄録全体を表示PDF形式でダウンロード (570K) -
スーパースムーズポリシングに関する研究(第1報)林 偉民, 河西 敏雄, 堀尾 健一郎, 土肥 俊郎1999 年 65 巻 4 号 p. 575-580
発行日: 1999/04/05
公開日: 2009/04/10
ジャーナル フリーThis paper deals with the basic research on super-smooth polishing methods and step height differences between work surfaces composed of various materials when mirror-polishing. A theoretical equation of step height was applied, and its calculated results showed good conformity to the actual values obtained by polishing of the specimens consisted of four different glasses, using cerium oxide powders and polyurethane polishers. When polisher was used over about 15 hours, its surface became stable and a constant step height was kept up on work surface. When, however, the polisher was dressed or washed, the polisher surface became unstable and relatively large difference in the step height was produced. The step height also showed a tendency to increase when rather soft polishers were used. Moreover, the elastic deformation amount affecting the step height was obtained for some polishers, by applying the experimental data and the equation.抄録全体を表示PDF形式でダウンロード (3005K) -
水谷 勝己, 川野 常夫, 足立 和俊, 熊谷 信男1999 年 65 巻 4 号 p. 581-585
発行日: 1999/04/05
公開日: 2009/04/10
ジャーナル フリーThe technique for simulating surface formation of a diamond grinding wheel is developed to evaluate typical characteristics of the surface topography. The simulation contains four procedures: simulating the grains with the long and short diameters according to those actual distributions in a mesh size, distributing the grains into the bond area of the wheel based on random or uniform manner, truing and dressing the wheel surface to make cutting edges under a grain protrusion ratio as the criterion of grain remaining or falling off, and evaluating characteristic values of the surface topography like density of cutting edges. The results showed that the surface topography simulated by the random grain distribution resembled the actual one when maximum grain protrusion ratio was 30-35% in resinoid bonded wheel and 35-40% in metal bonded wheel. The density of cutting edges, the length of cutting edges per unit area and the extent of maldistribution of grain were determined on the wheels of grain sizes from coarse to fine.抄録全体を表示PDF形式でダウンロード (2396K) -
三次元切削への適用と実用的諸効果の検討社本 英二, 馬 春翔, 森脇 俊道1999 年 65 巻 4 号 p. 586-591
発行日: 1999/04/05
公開日: 2009/04/10
ジャーナル フリーThe elliptical vibration cutting is applied to the three-dimensional turning operation in the present research. The direction of plane including the elliptical vibration is optimized, so that the chip is pulled out efficiently and thus the cutting force is minimized. Then, practical effects produced by applying the elliptical vibration are investigated experimentally, and the following remarks are obtained: (1) generation of burr is restrained almost completely, (2) machining accuracy is improved significantly, (3) regenerative chatter is suppressed, and (4) adhesion of the workpiece material to the rake face is reduced considerably. It is shown that the former three effects are caused by the extraordinary reduction of cutting force, and these effects are increased with the increase of velocity ratio, i.e. ratio of maximum vibration speed to nominal cutting speed.抄録全体を表示PDF形式でダウンロード (5186K) -
清水 正男, 文 承啓, 西川 明, 加藤 直子, 安武 潔, 芳井 熊安1999 年 65 巻 4 号 p. 592-597
発行日: 1999/04/05
公開日: 2009/04/10
ジャーナル フリーIn over-etching condition with CHF3 and O2 gas mixture, organic thin films on semiconductor device remains in contact holes of silicon integrated circuit device. Test element group devices were fabricated under various etching conditions to study the effects of organic thin film characteristics. Currant versus voltage (I-V) curves were measured on the contact holes filled with chemical vapor deposited W as electrode material. I-V curve of the contact hole that was additionally etched with CHF3 and O2 gas mixture was not linear and similar to the characteristic of MM (Metal Insulator Metal) structure. A bright thin image with 2-3 nm thickness was found at the interface between silicon substrate and the contact hole by cross sectional transmission electron microscopic observation, which was attributed to the remnant organic thin film. By the emission microscopic observation, several contact holes showed optical emission with two small peaks in their emission spectra The non-linear I-V characteristics and the optical emission spectra were well explained as the properties of W/organic thin film/heavily doped silicon structure. As a result of electrical circuit simulation, the heavy signal delay was expected due to the MIM characteristics of the contact hole with organic thin film.抄録全体を表示PDF形式でダウンロード (3391K) -
笠島 永吉, 森 和男, FU J.C., TROY C., 竹保 義博1999 年 65 巻 4 号 p. 598-603
発行日: 1999/04/05
公開日: 2009/04/10
ジャーナル フリーThough the Discrete Wavelet Transform (DWT) has gained attention in the field of machining monitoring, the potential use of DWT-based classification techniques has not yet been fully explored. In this paper, linear discriminant analysis is used to post-process DWT output for on-line prediction of small drill bit breakage. Bit failure is characterized by two types of transients ("sawtooth" and "screeching") in the cutting force signal. To detect these transients, instead of traditional Fourier based methods the DWT is used, which is better suited to analysis of time-localized phenomena. Three index functions ("energy", "waviness" and "irregularity") are adopted to test for the presence of transients in the DWT expansion. The indices are used to perform linear discriminant analysis, thereby classifying the input signals by state (normal or prefailure). Experiments showed that the DWT-based linear discriminant analysis method can accurately identify impending breakage about 1-3 cycles prior to failure even when the cutting conditions change.
Key words: drill, breakage, prediction, Wavelet Transform, discriminant analysis, in-process monitoring抄録全体を表示PDF形式でダウンロード (476K) -
中島 利勝, 塚本 真也, 寺岡 忠典, 小野 祐一郎1999 年 65 巻 4 号 p. 604-609
発行日: 1999/04/05
公開日: 2009/04/10
ジャーナル フリーIn this paper, a determination method of optimum conditions of oscillation is proposed in order to improve significantly the surface roughness of workpiece in oscillation internal grinding. Main conclusions obtained are as follows:(1) It is proved from the observation of 3 dimensional profile that each pattern of grinding grooves on the workpiece surface is differently generated by the phase difference of a grinding path.(2) The improving mechanism of surface roughness can be explained by the crossing phenomenon of grinding paths. (3) The existence of the restricted interference phenomenon becomes rougher the surface roughness of workpiece. (4) A determination method of the best conditions of oscillation internal grinding is proposed.抄録全体を表示PDF形式でダウンロード (745K) -
保持部のない円柱外面のバニシング装置の開発岡島 英昭1999 年 65 巻 4 号 p. 610-614
発行日: 1999/04/05
公開日: 2009/04/10
ジャーナル フリーIn older to finish an external surface of a cohntn or cylinder wcrkpiece, which does not have any clamping device, centerless roller bumishing equipment (planetary roller type) was newly proposed, and it has been practically confirmed that it can work effectively to burnish the surface of workpieces. The main part of the equipmet consists of cylindrical fixed head, rollers and hollow cylindrical frame. The assembled construction is, several rollers, which are rotatable respectively, are being supported within slots of the frame, and are deflected to the axis of the head with feed angle, and are disposed to contact an inner surface of head. By rotating frame, rollers can burnish a surface of column or cylinder when it is being passed through the equipment because of the self-propelling force by the feed angle function.抄録全体を表示PDF形式でダウンロード (3639K) -
崔 新, 竹ノ内 哲也, 堀内 宰, 池野 順一, 高巣 周平1999 年 65 巻 4 号 p. 615-619
発行日: 1999/04/05
公開日: 2009/04/10
ジャーナル フリーIn this paper, a permanent magnetic radial bearing activated by piezoelectric transducers is proposed to be combined with an air-spindle to improve the rotational accuracy and stiffness. Besides a PID controller, a repetitive controller is applied to the magnetic bearing to suppress the highly repeatable rotational errors of the air-spindle. It has been ascertained by experiments that at 300-1200rpm the rotational accuracy can be improved by control from the uncontrolled 30-50nm to the controlled 4-8nm. However, the non-repeatable rotational errors could not be suppressed because it was nearly equal to the noise level of the capacitive sensors detecting the errors. An infinite static stiffness was obtained under a load less than 3.8N which was the load capacity of the magnetic bearing. Dynamic stiffness was increased by 5-15dB comparing with the original air-spindle.抄録全体を表示PDF形式でダウンロード (418K)
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