巻号一覧
56 巻, 5 号
選択された号の論文の27件中1～27を表示しています
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ナノ研削技術への道宮下 政和1990 年 56 巻 5 号 p. 782-787
発行日: 1990/05/05
公開日: 2009/06/30
ジャーナル フリーPDF形式でダウンロード (3603K) -
K. E. PUTTICK, A. FRANKS, 金井 彰1990 年 56 巻 5 号 p. 788-793
発行日: 1990/05/05
公開日: 2009/06/30
ジャーナル フリーラッピングとポリシングはぜい性材料を延性破壊モードで加工面に損傷を与えずに加工する方法として活用されてきたが, 複雑な曲面を能率良く加工したいという今日の高度技術のニーズに対応できない.延性モード研削はこのラッピング技術の限界を克服できる可能性をもっている.ぜい性材料の曲面の延性モード研削が可能な研削盤の開発は, 運動精度や剛性の点で厳しい性能を要求されるが, 基本的には不可能な理由は無いと考えられる.抄録全体を表示PDF形式でダウンロード (5883K) -
Thomas A. Dow, Ronald O. SCATTERGOOD, 海野 邦昭1990 年 56 巻 5 号 p. 794-799
発行日: 1990/05/05
公開日: 2009/06/30
ジャーナル フリー硬ぜい材料を研削する場合に, 研削形態が延性モードからぜい性モードに変化する遷移条件は, 延性モード研削技術を確立する上で非常に重要である.抄録全体を表示PDF形式でダウンロード (3063K) -
Norman J. BROWN, 柴田 順二1990 年 56 巻 5 号 p. 800-805
発行日: 1990/05/05
公開日: 2009/06/30
ジャーナル フリーここでは, ラッピング加工における磨き作用とせん断モード研削作用のかかわり, すなわち破壊欠陥の発生限界, 加工欠陥層の抑制, 化学反応の効果などについて論じる.抄録全体を表示PDF形式でダウンロード (1273K) -
P. A. MCKEOWN, K. CARLISLE, P. SHORE, R. F. J. READ, 田島 琢二1990 年 56 巻 5 号 p. 806-814
発行日: 1990/05/05
公開日: 2010/02/16
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鈴木 弘1990 年 56 巻 5 号 p. 815-819
発行日: 1990/05/05
公開日: 2009/06/30
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吉田 庄一郎, 伊東 博1990 年 56 巻 5 号 p. 820-824
発行日: 1990/05/05
公開日: 2009/06/30
ジャーナル フリーPDF形式でダウンロード (7644K) -
中山 恒1990 年 56 巻 5 号 p. 827-830
発行日: 1990/05/05
公開日: 2009/06/30
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鳥羽山 満1990 年 56 巻 5 号 p. 831-835
発行日: 1990/05/05
公開日: 2009/06/30
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原 靖彦, 土井 秀明, 沼田 清, 遠藤 健三, 品田 聡1990 年 56 巻 5 号 p. 837-842
発行日: 1990/05/05
公開日: 2009/06/30
ジャーナル フリーThis paper describes a system which automatically inspects defects in plated through-holes formed in muti-layer printed circuit boards. These defects are the type of which a part of copper is lacking on the wall of the plated through-hole. In order to detect the defects, the system utilizes fluorescent light emission from the base materials of the boards. The through-holes are illuminated with a green light. The system detects defects by sensing the fluorescent light with an ultra-high sensitivity detector. If there are any defects, i. e., if there, is any part of base material exposed, the materials emit red fluorescent light. It has been proved that the system can detect circular voids as small as φ150 μm, or voids with a surface area bigger than φ150 μm.抄録全体を表示PDF形式でダウンロード (7163K) -
黒河 治久, 市川 直樹, 矢島 信之1990 年 56 巻 5 号 p. 843-848
発行日: 1990/05/05
公開日: 2009/06/30
ジャーナル フリーA measuring system was developed to test surface flatness of a large panel for space use. A fringe scanning moiré method was adopted for the system and high measuring accuracy and short sampling time was realized. A linear drive mechanism was used to move the grating by 25 μm for the fringe scanning. The deformation of the panel caused by heat in space was simulated using honeycomb panel (1.5m×1.0m) and a computer controlled heat source. The deformation caused by temperature difference between front and rear surface was measured by the moiré system.抄録全体を表示PDF形式でダウンロード (3144K) -
ジャンプ動作の適応制御土屋 政光, 金子 勉, 佐藤 清侍1990 年 56 巻 5 号 p. 849-854
発行日: 1990/05/05
公開日: 2009/06/30
ジャーナル フリーThis paper describes a newly developed strategy of adaptive control of electrode motion for the jump-flushing in the diesinking EDM. This strategy consists of two parts. First, the execution timing of the jump-motion of the electrode is determined by a sub-system of gap-condition detector which samples peak voltages of wave forms appeared in the working gap and predicts the occurrence of the harmful arc by processing the data of these voltages, and then, outputs a request-signal for the jump-motion. Second, according to an algorithm which evaluates the sinking speed, the amplitude of the jump-motion is controlled adaptively so that this speed will be kept higher. The main experimental results obtained are as follows : (1) Appropriate setting of parameters used in the sub-system for determining its operation makes it possible to avoid the harmful arc even when the depth of cut increases fairly. (2) The amplitude of the jump-motion of the electrode is changed effectively with keeping the sinking speed almost optimal during whole process in machining.抄録全体を表示PDF形式でダウンロード (1183K) -
宮地 隆太郎, 原田 正躬1990 年 56 巻 5 号 p. 855-860
発行日: 1990/05/05
公開日: 2009/06/30
ジャーナル フリーRecently, gas bearings have been used in high speed spindles and in ultra precision cutting machines. It is known that the bearing performances are defined in stiffness and damping, and when the disturbance force acts on the shaft, the shaft response is predicted by damping factors of the bearing system and frequency ratio. In this paper, the journal center locus is measured in two cases : one is when the radial and the tangential electromagnetic forces act on the shaft twice and the other, four times, at every rotational cycle time at 10000 rpm and 30000 rpm, and theoretical calculations and experimental results are compared. Following conclusions are obtained : (1) The time of shaft convergence is shorter under low supply pressure than under high supply pressure. (2) The amplitude of shaft vibration becomes small when frequency ratio is greater than 2-3. (3) When high frequency external forces act on the shaft at every rotational cycle time, if the radial damping factor (ξr) gets to over 0.3 and the tangential damping factor (ξt) over 0.5, the shaft comes to the steady state within 2-3 periods of rotational cycle time at 30000 rpm.抄録全体を表示PDF形式でダウンロード (1152K) -
加藤 秀雄, 中野 嘉邦, 野村 雄二郎1990 年 56 巻 5 号 p. 861-866
発行日: 1990/05/05
公開日: 2009/06/30
ジャーナル フリーThe present paper describes a newly developed in-situ measuring system of the circularity of a workpiece in cylindrical grinding. The principle of the measurement is based on Three-Point Method. In this system, however, apparent runouts of a ground surface are measured at various angular positions by using only one displacement detector, which can be displaced around the workpiece axis with a stepping motor and in the radial direction with a piezo-actuator. In order to improve the measuring accuracy, the circularity profiles are determined by averaging five different measurements. By applying the developed system to a cylindrical grinding machine, it has been confirmed that the measured circularity profiles are in good agreement within submicron accuracy with those measured by using a circularity measuring instrument.抄録全体を表示PDF形式でダウンロード (1075K) -
米田 孝夫, 鈴木 郁男, 海野 邦彦1990 年 56 巻 5 号 p. 867-872
発行日: 1990/05/05
公開日: 2009/06/30
ジャーナル フリーThe profile of non-circular profile cams used for engine intake and exhaust control are generally finished by profile grinding using a master model. For cutting things like dies and molds, NC contouring is often employed in which the relative motion between the machine and the workpiece is directly controlled numerically, without using a mater model. Conventionally, however, NC profile machining cannot be used for high-speed machining as with copy-profiling operations although setup changes can be accomplished in a short time when shape of workpiece is changed. Recently, NC functions have been upgraded and high-speed machining equivalent to copy-profiling method is now possible. The_purpose of the study discussed in this paper is the development of a high-speed, high-accuracy NC profile grinding method for non-circular shapes. As the first step, this paper analyzes the relationship between the workpiece and the grinding wheel, using an engine intake and exhaust control cam as an example. At the same time, it also discusses profile error caused by variable factors such as wheel wear. A practical method of restricting profile error is proposed and the effects of the proposed method are clarified.抄録全体を表示PDF形式でダウンロード (961K) -
林 正和, 石田 文彦, 小松 忠紀, 津田 展宏1990 年 56 巻 5 号 p. 873-878
発行日: 1990/05/05
公開日: 2009/06/30
ジャーナル フリーTo take a detailed characteristics of a surface topography for X-ray or laser mirrors, STMs (Scanning Tunneling Microscopes) have been found to be very useful, owing to their ultra-high spatial resolution. However, conventional STMs are not sufficiently useful for this industrial purpose, because of the small measurement area involved. The authors developed a Wide Range STM using monolithic mechanisms and have developed a wider range and easy to use STM. In this new instrument, a sample is scanned in lateral directions with divided electrodes bimorph PZTs. This furnishes the ability to achieve 200 μm×63 μm scan range and that an actual mirror, such as one which has a 50 mm diameter, can be set on the sample stage. It is possible to successfully measure a grating, whose pitch is 0.42 μm over about 200 μm scan line. Also, a diamond turning mirror was measured over an about 45 μm×2.5 μm area tentatively. The resolution for this one is 4 nm vertically, at the most. These measurements reveal the saw wave topography of the grating and considerable detail on diamond turning marks on the mirror surface. The proposed new STM is very useful, because this measurement gives more information, exceeding the amount available using contact stylus methods and optical methods.抄録全体を表示PDF形式でダウンロード (1200K) -
倉賀野 哲造, 佐々木 伸夫1990 年 56 巻 5 号 p. 879-884
発行日: 1990/05/05
公開日: 2009/06/30
ジャーナル フリーA system which generates tool paths to manufacture aesthetically pleasing freeform objects has been developed. The system is able to avoid all types of tool collision and to produce precision freeform shapes whose surfaces are smooth. The system is able to adjust for the heat shrinkage factor of the material used and the clearance of the electrodes used to manufacture molding dies. In this system, designers do not have to consider molding dies when they design aesthetically pleasing objects. This system runs on a graphic workstation and has a menu-driven human interface. Using this system, aesthetically pleasing freeform objects can be manufactured with high precision and surface smoothness.抄録全体を表示PDF形式でダウンロード (6969K) -
小島 宏行, 小山 清, 柴崎 憲司1990 年 56 巻 5 号 p. 885-890
発行日: 1990/05/05
公開日: 2009/06/30
ジャーナル フリーIn this paper, the dynamic characteristics of a two-link robot holding an elastic body are investigated theoretically. The elastic body consists of two masses and two beams without mass. Then, the robot arm are driven by the harmonic drive gears and the direct current servo motors, and the position control system is based on the sinus wave velocity pattern or the trapezoidal shape one. In the theoretical analysis, the state equation of the mechatronis system is derived by applying the Lagrangian of the mechanical system to the Hamilton's principle, in consideration of the transient vibration of the elastic body. Furthermore, the numerical simulation has been carried out, and the effects of the rigidity of the elastic body and the position control method on the dynamic characteristics are demonstrated.抄録全体を表示PDF形式でダウンロード (915K) -
システム構成方法川島 泰正, 伊藤 久美子, 石田 智利, 野中 士郎, 江尻 一彦1990 年 56 巻 5 号 p. 891-896
発行日: 1990/05/05
公開日: 2009/06/30
ジャーナル フリーThis paper presents a new method to construct a solid model based machining verification system, which includes (1) system configuration technique with three subsystems and removed volume storing for the selective visualization of machining scenes ; (2) dimensional measuring task simulation using measuring instrument models for the quantitative evaluation of machined shape. With this method, firstly the user can detect the dimensional errors on the final machined shape, and then check selectively the machining steps which yield the errors. As the result, the time consumed for step-by-step verification of NC data is reduced. Besides, the accuracy of the error detection is increased.抄録全体を表示PDF形式でダウンロード (3681K) -
本間 義彦1990 年 56 巻 5 号 p. 897-899
発行日: 1990/05/05
公開日: 2009/06/30
ジャーナル フリーPDF形式でダウンロード (497K) -
スパッタ型薄膜磁気ディスク表面の場合柳 和久, 桑原 利友, 田中 紘一1990 年 56 巻 5 号 p. 900-905
発行日: 1990/05/05
公開日: 2009/06/30
ジャーナル フリーThe appropriate measuring method for the micro-irregularities on a magnetic rigid disk surface was proposed and the characterizing techniques for such minute topographic data have been developed to correlate with its tribological properties. In addition to the conventional roughness parameters, new statistical parameters for evaluating the textured disk surfaces such as modified structure function based on asperity peaks only, peak height distribution and mean slope near the peak were proposed to distinguish the subtle discrepancies among those textured disks and to estimate the frictional characteristics between a head unit and a disk. The main results obtained were as follows. (1) The preliminary disks with no sputter-coated films have shown the gradually decreasing coefficient of friction with the increased value of arithmetic average roughness R. up to 15 nm regardless of the texture. (2) In case of the disks coated with carbon layer or liquid lubricant film, the coefficient is greatly influenced by the height and number distribution of asperity peaks and/or the mean slope near the peaks that are evaluated with those statistical parameters presented in this paper.抄録全体を表示PDF形式でダウンロード (3203K) -
PVD処理した熱間金型鋼の皮膜挙動について日原 政彦, 藤原 和徳, 向山 芳世, 緒方 勲1990 年 56 巻 5 号 p. 906-910
発行日: 1990/05/05
公開日: 2009/06/30
ジャーナル フリーThe effects of TiN and CrN coating on the life of die for aluminium die casting have been studied, coating were carried out using the PVD process. Sample coated with TiNsand CrN were evaluated by erosion tests using a molten bath of aluminium and thermal fatigue tests. The surfaces and sectional areas of these samples were examined the scanning electron microscopy and electron probe X-ray microanalyses. The results obtained were summarized as follows : (1) In the erosion test of the samples, the weight loss of TiN coating sample were smaller than those of the CrN coating and the ordinary SKD61 samples. (2) Crack propagation in these samples duaring the thermal fatigue test showed that the CrN coating sample generated cracks more rapidly than ordinary SKD61 and TiN coating samples. (3) Electron probe X-ray microanalyses of the TiN coating sample showed micro-blowholes, which are considered to be formed either during the vaporization process or during thermal fatigue test were observed in the boundary between the matrix and TiN film and sulfur was detected on the wall in the micro-blowholes. It can be considered that the grain boundary segregation of sulfur occurred during the testing. It was also found that the TiN film grew into the blowholes after 10000 cycle tested.抄録全体を表示PDF形式でダウンロード (6049K) -
欠損発生機構と欠損予測臼井 英治, 帯川 利之, 松村 隆1990 年 56 巻 5 号 p. 911-916
発行日: 1990/05/05
公開日: 2009/06/30
ジャーナル フリーFracture probability of an alumina ceramic tool during the exit of interrupted cutting is calculated using the transient distribution of tool face stresses, which was already obtained through the FEM simulation analysis in the previous paper. Contrary to expectation, the fracture probability reaches the maximum just before the downward crack initiation for making the chip with “foot”. The cutting edge becomes safe immediately after the crack initiation, because the cutting forces drop rapidly and the chip root pushes up the edge flank to yield a hydrostatic stress state. The fracture onset around this instant is proved experimentally. It is also revealed that the edge fracture is restrained by the early initiation of the crack with brittle workpiece and small exit angle, while the fracture is promoted by the delayed initiation with low friction on the tool face.抄録全体を表示PDF形式でダウンロード (5471K) -
李 勇, 藤井 義也, 岩部 洋育1990 年 56 巻 5 号 p. 917-922
発行日: 1990/05/05
公開日: 2009/06/30
ジャーナル フリーThis paper presents an optimized determination of tool diameter, radial and axial depths of cut in end milling process. For such a purpose, an index of performance is proposed of which machining accuracy, manufacturing cost as well as machining efficiency are taken into consideration. Consequently, by means of the proportional relation to cutting force, maximum chip area which affects machined surface is analyzed with the behavior of cutting edge. Furthermore, flexural rigidity of end mill is investigated and an experiment of tool wear is carried out. Through these approaches, the index of performance is calculated and the optimum values of diameter of end mill and depths of cut are discussed.抄録全体を表示PDF形式でダウンロード (1090K) -
山本 正興, 柴田 隆行, 斎藤 勝政1990 年 56 巻 5 号 p. 923-928
発行日: 1990/05/05
公開日: 2009/06/30
ジャーナル フリーInfluences of surface defects of silicon substrate on nucleation density of diamond synthesized in gas phase are investigated. Diamond is synthesized from methan-hydrogen using hot filament method. Substrate surface is treated by methods of ultrasonic treatments of abrasive particles of silicon carbide and diamond. Observations of nucleation phenomena are carried out by TEM, SEM and Raman spectroscopy. It is revealed that defects are induced in the thin surface layer by the treatments. These defects are almost edge dislocations. The surface treated by ultrasonic diamond particle method is very effective on nucleation of diamond because of high edge dislocation density in the surface layer with about 50 nm in depth. The nucleation of diamond most likely occurs on the cross points of edge dislocations and the surface.抄録全体を表示PDF形式でダウンロード (9380K) -
二次元き裂のJ積分からみた材料端部でのき裂進展挙動山口 勝己, 水谷 勝己, 田中 芳雄1990 年 56 巻 5 号 p. 929-934
発行日: 1990/05/05
公開日: 2009/06/30
ジャーナル フリーChipping at work corner in grinding is formed by the propagation of an already initiated crack to the work end surface. The present paper deals with the propa-gation facility of the crack initiated near the work corner by evaluating its J integral with respect to that far from the work corner. The focus is the change in the J integral related to the geometric factors such as position, length and angle of the initiated crack and active position of grinding force. Boundary element method (BEM) is used to analyze the model of single point grinding. The typical shape and size of the crack in the model is experimentally determined by the grinding of soda-lime glass with single point diamond tool. Main conclusions obtained are as follows : (1) The J integral of the already initiated crack has a peak value due to the grinding force at the position slightly apart from the crack tip. (2) The peak of J integral drastically increases in case that the crack exists within a certain distance from the work end so as to bring about the chipping at the corner. (3) Increases in length and angle of the crack also elongate this distance which determines the chipping size at the work corner.抄録全体を表示PDF形式でダウンロード (3364K) -
真崎 浩一, 安斎 正博, 中川 威雄1990 年 56 巻 5 号 p. 935-940
発行日: 1990/05/05
公開日: 2009/06/30
ジャーナル フリーMost of mold manufacturing procedures have been automated by the introduction of NC machine tool and CAD/CAM system. But the surface finishing of the mold must be done by hand work of well-skilled workers. Though many attempts were tried in the past 10 years to eliminate this hand work, the automatic finishing of mold surface with 3D curvature has not been achieved yet. New magnetic abrasive finishing process is thought as one of the possible methods for the automation of 3D surface finishing. In order to improve the grindability of magnetic abrasive Fe-NbC was made by Plasma Powder Melting (PPM). Fe-NbC abrasive was experimentally checked and its excellent grindability was confirmed by finishing milled surface into mirror surface. This Fe-NbC abrasive may contribute to the automatic 3D finishing combined with CAD/CAM system.抄録全体を表示PDF形式でダウンロード (9604K)
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