巻号一覧
65 巻, 3 号
選択された号の論文の25件中1～25を表示しています
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高田 祥三1999 年 65 巻 3 号 p. 349-355
発行日: 1999/03/05
公開日: 2009/04/10
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梅田 靖1999 年 65 巻 3 号 p. 356-359
発行日: 1999/03/05
公開日: 2009/04/10
ジャーナル フリーPDF形式でダウンロード (1955K) -
北 良平1999 年 65 巻 3 号 p. 360-363
発行日: 1999/03/05
公開日: 2009/04/10
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小野寺 勝重1999 年 65 巻 3 号 p. 364-367
発行日: 1999/03/05
公開日: 2009/04/10
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植村 悟1999 年 65 巻 3 号 p. 368-372
発行日: 1999/03/05
公開日: 2009/04/10
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酒井 忠雄1999 年 65 巻 3 号 p. 373-376
発行日: 1999/03/05
公開日: 2009/04/10
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萩原 正弥1999 年 65 巻 3 号 p. 377-380
発行日: 1999/03/05
公開日: 2009/04/10
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倉賀野 哲造, 斉藤 勝, 黒田 満, 古川 進1999 年 65 巻 3 号 p. 381-385
発行日: 1999/03/05
公開日: 2009/04/10
ジャーナル フリーThe purpose of this study is to generate surface patches which are useful throughout the product-design-process using the three dimensional point data measured by commercially obtainable measuring instruments. Delaunay Triangulation is introduced to construct triangular mesh from the three dimensional measured points. Pseudo normal vectors are calculated using triangular mesh in a very short time. Using pseudo normal vectors, product-designers are able to examine the designed surface patches precisely by shading or newly developed color striped shading. Then product-designers are able to select the point data which correspond to the filleted or characteristic part, and generate the surface patches which are easy to manipulate for narrowing down to the final design. A golf club design-process from the measured points is shown as an actual example.抄録全体を表示PDF形式でダウンロード (9155K) -
山本 徹也, 鈴木 宏正, 金井 崇, 木村 文彦1999 年 65 巻 3 号 p. 386-390
発行日: 1999/03/05
公開日: 2009/04/10
ジャーナル フリーThe purpose of this research is to develop methods to rapidly create smooth three dimensional shape models from rough models for free-form shape design. In our previous work, a subdivision approach using the theory of local fitting a triangular mesh (a polygon with triangular faces) to quadric surface was proposed for creating smooth surface models. Based on this approach, some extended subdivision methods including crease edge subdivision and non-uniform subdivision are presented in this paper, and they are evaluated with approximate surface continuity and angle between normals. It is shown that these subdivision methods are useful for creating smooth models in rapid prototyping technologies.抄録全体を表示PDF形式でダウンロード (4638K) -
喜田 義宏, 藤川 泰, 廣垣 俊樹, 中川 平三郎, 垣野 義昭, 山路 伊和夫1999 年 65 巻 3 号 p. 391-395
発行日: 1999/03/05
公開日: 2009/04/10
ジャーナル フリーThis study describes laser heat treatment of die steels using YAG laser on-the-machine tool. An optical fiber has been used in order to transmit the laser light from a source to workpieces at this system. At first, the temperatures based on a theoretical model during laser irradiation were estimated in order to predict the hardened range of workpieces. Second, experiments of laser heat treatment were carried out for various die steels in order to grasp the relationship between the hardened depth and irradiation conditions. Finally, a method to repeat laser irradiation at the same area was proposed to increase the hardened depth. As a result, the detail of the hardened depth for various die steels becomes clear under various laser irradiation conditions. It is found that this heat treatment of die steels with YAG laser on-the-machine tool is an effective method.抄録全体を表示PDF形式でダウンロード (2510K) -
斉 暁勇, 清水 伸二, 今井 登1999 年 65 巻 3 号 p. 396-400
発行日: 1999/03/05
公開日: 2009/04/10
ジャーナル フリーA new measuring method and a new device are proposed to measure the thermal displacement of machine tools. It is intended that the device can be applied universally to the machine tools with higher-speed spindle in future and the more accurate measurement can be done. In this device, three sensors are set to the peripheral surface of the reference tool and three sensors are set to its end surface, to measure the translational and angular thermal displacements of the spindle against the table. This device is suitable for high-speed rotation, since the overhang of the reference tool from the spindle nose is as smaller as possible unlike the device discussed in ISO at present. Moreover, only the component of the thermal displacement can be obtained by the Three Points Method, being separated from the thermal expansion of the reference tool and the sensor fixture and the centrifugal expansion of the reference tool. In order to make clear the propriety of this method, experiments are carried out on the machining center with a high-speed spindle and their results are compared with those of the theoretical calculation. The experimental results agree well with the theoretical ones.抄録全体を表示PDF形式でダウンロード (440K) -
工具の各種誤差要因が形状誤差に与える影響およびその最適補正法の検討鈴木 浩文, 北嶋 孝之, 奥山 繁樹1999 年 65 巻 3 号 p. 401-405
発行日: 1999/03/05
公開日: 2009/04/10
ジャーナル フリーThis paper deals with the precision machining of an axi-symmetric aspherical surface for optical lens molding dies by use of diamond tool. At first, the effects of the tool radius error and the tool positioning errors (horizontal directions) on the workpiece form accuracies are simulated and its compensation methods are discussed. And a compensation system for the tool deviation profile was developed, which can compensate the tool "path based on the tool deviation profile. The tool deviation profile is calculated from the post-process measured data of the machined workpiece surface profiles. Finally, in the aspherical turning tests, the molding dies of electroless deposited nickel-phosphorous (Ni-P) alloy for plastic lenses are examined. The experimental results show that the workpiece accuracies were improved by this new compensating system and a form accuracy of less than ±0.1 μm was obtained even in the case of using an inferior tool.抄録全体を表示PDF形式でダウンロード (4157K) -
基本概念と修正加工例武沢 英樹, 古谷 克司, 毛利 尚武1999 年 65 巻 3 号 p. 406-410
発行日: 1999/03/05
公開日: 2009/04/10
ジャーナル フリーSince industrial products have become higher in performance and finer in size, machining with higher accuracy is required. On the other hand, a high accuracy positioning system has been realized by feedback the position data of a controlled object. In this report, the authors propose a concept of a new machining system with feedback of shape as in positioning with displacement feedback. To fabricate products with high accuracy, the authors have developed a simple and flexible method for an on-the-macine measurement system by a calibration with geometrical solids. The authors have also developed a metal surface modification method using a green compact electrode of tungsten carbide powder by EDM in hydrocarbon oil. This process is realized on the same machine under the process of removal EDM and accretion EDM. These two techniques are combined in order to implement the precision machining system by feedback of shape data. Some examples of machining by this system are described. The machining accuracy of ±20μm can be obtained for both flat and 2-dimensional shapes by using the proposed system.抄録全体を表示PDF形式でダウンロード (4133K) -
振動条件の影響に関する検討社本 英二, 森本 祥之, 森脇 俊道1999 年 65 巻 3 号 p. 411-417
発行日: 1999/03/05
公開日: 2009/04/10
ジャーナル フリーEffects of vibration conditions on the cutting performances in the Elliptical Vibration Cutting, which has been proposed by the authors, are investigated in the present research. Cutting experiments are conducted within a scanning electron microscope in order to observe the cutting process directly. Furthermore, the roughness due to the elliptical vibration is calculated geometrically, the instantaneous relief angle is checked theoretically so that it does not become negative during cutting, and the shear angle is predicted by assuming an average friction angle and utilizing Krystors maximum shear stress model. The experimental and analytical results show that the surface roughness decreases exponentially with an increase in the vibration frequency. It is also shown that the shear angle increases to greater than 60° and the peak cutting force decreases to less than one sixth of the force measured in the ordinary cutting, when the vibration speed is 43 times higher than the nominal cutting speed. The effects of the other vibration conditions, i.e. ratio of vertical and horizontal amplitudes and phase difference between the vertical and horizontal vibrations, are also clarified by the experiments and the analysis.抄録全体を表示PDF形式でダウンロード (2431K) -
3波長での位相測定を用いる方法安達 正明, 北川 洋一, 松本 哲也, 稲部 勝幸1999 年 65 巻 3 号 p. 418-422
発行日: 1999/03/05
公開日: 2009/04/10
ジャーナル フリーThe authors propose a new method which can measure a shape of rough step like surface by means of a speckle interferometry with a wavelength-changeable laser. A speckle phase available in the interferometry is usually affected not only by an optical path difference but also by a random component associated with surface roughness. The phase shifting method using two different wavelengths (λ1, λ2) is, therefore, limited to a single phase map about the optical path difference, because of the random component which remains without cancel. The single phase map is available only for the calculation of the shape of a continuous surface. In the proposed method, the authors use three different wavelengths (λ1, λ2, λ3) to obtain a double phase map, which is capable of a discontinuous surface shape calculation by means of a fringe-counting two-wavelength method. The validity of the method is experimentally demonstrated and discussion is extended to an accuracy of the measurement and an extent of the measurement range.抄録全体を表示PDF形式でダウンロード (533K) -
2次元断面曲線の統計情報に基づいた方法直井 一也, 笹島 和幸, 塚田 忠夫1999 年 65 巻 3 号 p. 423-427
発行日: 1999/03/05
公開日: 2009/04/10
ジャーナル フリーEvaluation of truncated surface asperities is critically important in many industrial applications. It is necessary to compare original profile with truncated one in a discussion of truncation process, i.e. wear mechanism and plateau horning etc. For the comparison of profiles, we have to relocate truncated profile to original one. But there is a limitation of relocation using a hardware. To relocate accurately, we suggest a relocation technique using software. In this paper, we present a new relocation technique by corresponding untruncated areas between truncated profile and original one by software. We calculate probability distributions of two profile's heights and relocate profile to collate them. Furthermore, we discuss the availability of this technique in simulation data and measured one.抄録全体を表示PDF形式でダウンロード (482K) -
ローララック形トロコイド歯車の動作原理石田 和義, 寺田 英嗣, 古屋 信幸, 牧野 洋, 今瀬 憲司1999 年 65 巻 3 号 p. 428-432
発行日: 1999/03/05
公開日: 2009/04/10
ジャーナル フリーRoller rack type trochoidal gear assembly has been developed which consists of a series of roller train and a mating cam pinion. Motion principle for the mechanism has been analyzed. To avoid undercut which occurs at the dedendum, we applied some amount of "profile shifting". The optimum value of the profile shifting coefficient is discussed in relation to contact factor and pressure angle. Roller diameter and tooth height also affects to the mechanism design. A prototype of roller rack trochoidal gear assembly was constructed using the optimal values. The accuracy and the smoothness of the motion proved to be sufficient for practical applications.抄録全体を表示PDF形式でダウンロード (2149K) -
田代 発造, 吉川 和男, 田中 芳典, 野村 俊, 神谷 和秀, 宮代 裕1999 年 65 巻 3 号 p. 433-437
発行日: 1999/03/05
公開日: 2009/04/10
ジャーナル フリーThis paper describes the application of a wavelet transform as a method to analyze a partial fringe pattern. A zone-plate interferometer can measure errors in the shape of spherical or aspherical mirrors. There are no interference fringes outside mirrors. However, partial fringes are found near the edge of round mirrors. It is difficult to analyze partial fringes by the Fourier transform method, the method generally used to analyze the overall interference fringe pattern in an image. To overcome this disadvantage, a method is proposed that uses a wavelet transform instead of a Fourier transform to analyze such fringes. Analysis results are obtained as phases of fringes. By relating these phases to optical path differences, errors in the shape of the mirror are obtained automatically. This technique can be used for other types of fringe analysis as well.抄録全体を表示PDF形式でダウンロード (717K) -
プロトタイプモデルによる基礎的研究磯部 浩己, 久曽神 煌, 小島 茂1999 年 65 巻 3 号 p. 438-442
発行日: 1999/03/05
公開日: 2009/04/10
ジャーナル フリーHydrostatic air bearings allow a floating shaft to rotate accurately with compressed air. They are utilized in many fields because of their load carrying capacity, although the shaft does not rotate. However, the installation of additional equipment such as air compressor, regulator and pipelines etc. is required to supply pressured air into the bearing. In this research, piezoelectric actuators oscillate a number of pads surrounding the shaft. In consequence, squeeze air films with load carrying capability are developed. A piezo displacement pattern consists of two functional waveforms. The AC component stimulates the squeeze motion and the other DC component shifts the mean position of oscillating pad. Therefore, application of a controllable piezo-driving pattern allows the shaft to be manipulated. In this paper, the air film characteristics are investigated experimentally for a prototype model with two circular plates of 15mm in radius as oscillating pads. The squeeze air film was able to support the object against the external load of 4.9N with a mean film thickness of 5.5μm. It had the capability to support an external load up to 9.8N with a stiffness of 1.8N/μm. By constructing a simple feedback system, the object was manipulated accurately without contact.抄録全体を表示PDF形式でダウンロード (500K) -
河野 嗣男, 松本 大司, 細越 剛史, 矢澤 孝哲, 宇田 豊1999 年 65 巻 3 号 p. 443-446
発行日: 1999/03/05
公開日: 2009/04/10
ジャーナル フリーA stable interferometer using two zone plates is developed for on-machine measurement of a concave mirror figure. The principle of measurement is based on the radial shearing interference in which the measuring wavefront from the entire mirror surface under test is referred to that from the central part. On-machine experiments showed that the interferometer is stable enough to be applicable to inprocess measurement for diamond turning at about 0.06 μm P-V accuracy.抄録全体を表示PDF形式でダウンロード (349K) -
奥山 栄樹, 守時 一1999 年 65 巻 3 号 p. 447-451
発行日: 1999/03/05
公開日: 2009/04/10
ジャーナル フリーIn the field of the surface profile measurement, the software datum is used to realize high accuracy beyond the limit of the hardware accuracy of instrumentations. 3-point method is the typical software datum for the roundness measurement. This paper reports the influence of the difference of the gain and the spatial frequency response between sensors. As the result of simulations, the difference of the characteristics affects the measured result when the gain of the weighted addition in the spatial frequency domain is almost zero.抄録全体を表示PDF形式でダウンロード (353K) -
稲葉 善治, 内藤 保雄1999 年 65 巻 3 号 p. 452-458
発行日: 1999/03/05
公開日: 2009/04/10
ジャーナル フリーThe toggle mechanism has many advantages as a clamp mechanism of all electric driven plastic injection molding machine. Four-point type and five-point type of toggle mechanism are mainly used for this purpose. In this paper, a new systematic determining process of each geometric dimension of toggle mechanism will be shown instead of conventional process based on trial and error. And in this study of searching optimum geometric dimensions, a new idea of five-point type toggle mechanism was innovated and named RDP five-point type toggle mechanism. This RDP five-point toggle mechanism realized more compact size and faster motion comparing with conventional toggle mechanism.抄録全体を表示PDF形式でダウンロード (3202K) -
秋山 伸幸, 杉原 修二, 吉田 昌弘, 染次 孝博1999 年 65 巻 3 号 p. 459-463
発行日: 1999/03/05
公開日: 2009/04/10
ジャーナル フリーA machine for automatic measurement of the surface roughness of 3-dimensional cast metals using an optical noncontact method has been developed. The specimen is illuminated from eight surrounding directions with the incident angle of 60° and detected by a CCD camera, perpendicular to the surface. The surface roughness R. can be obtained from the contrast C, which is calculated using the image detected by the CCD camera. First, the specimen is positioned at an angle of 0°, 46° or 90° with respect to the x axis. Second, at each of these positions, the images of the specimen are detected by the CCD camera by rotating the specimen in steps of 45° between 0° and 360° around the z'axis. The regions to calculate the contrast C for each image are obtained from the shape data of the specimen which are measured using a 3-dimensional coordinates measuring machine. In the experiment, the specimen is illuminated from eight surrounding directions using 100W halogen lamps and Fresnel lenses, and the surface roughness R. at various regions on the specimen is calculated. As a result, the surface roughness of good or defective specimens is measured with an error less than ±25%.抄録全体を表示PDF形式でダウンロード (4686K) -
神谷 好承, 関 啓明, 疋津 正利, 酒井 史敏1999 年 65 巻 3 号 p. 464-468
発行日: 1999/03/05
公開日: 2009/04/10
ジャーナル フリーConventional servo driver is generally used for driving a servo motor. The servo driver has not only a role of amplifying a control signal. Aiming at a high performance of the motion control such as decreasing the steady state error against the disturbances, compensation circuits should be involved in the servo driver. Therefore, the dynamic characteristic of DC servo motor becomes very complex. And some phenomena of which we cannot explain the reason appear if we suppose that the servo driver has only a role of amplifying a control signal. Also, in the field of controlling a robot, it has been difficult to decide the feedback gain of the force control signal theoretically. So, in this study the dynamic characteristics of DC servo motor driver by the conventional servo driver are verified in detail and the design process of the servo mechanism is also verified.抄録全体を表示PDF形式でダウンロード (409K) -
松田 文夫, 長南 功男, 北川 秀夫, 曽我 竜介, 服部 秀三1999 年 65 巻 3 号 p. 469-473
発行日: 1999/03/05
公開日: 2009/04/10
ジャーナル フリーAn object shape is changed by cyclic physical excitements, for example, sunlight in nature or vibration in factory. The change of shape is very fine and also cyclic. A new method is given for detecting edge movements of a cyclic moved object by cyclic physical excitements. The movement is very fine in a pixel on the image sensing device in a CID (Charge Injection Device) camera, but can be sensed by synchronized image input as cyclic edge movements of object. Every cycle has two images. One is with the excitement and another is with no excitement. The difference between the two images is calculated and these differences are summed 8 times. The summation has 64X128 matrix and shows the edge movement of a moved object. A conventional method with asynchronized image input gives 0.1 pixel resolution. The new method with synchronized image input gives 0.036 pixel resolution.抄録全体を表示PDF形式でダウンロード (3611K)
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