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50 巻, 12 号
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三橋 慶喜1984 年 50 巻 12 号 p. 1815-1821
発行日: 1984/12/05
公開日: 2009/06/30
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石尾 秀樹, 藤井 洋二1984 年 50 巻 12 号 p. 1822-1828
発行日: 1984/12/05
公開日: 2009/06/30
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泉谷 徹郎1984 年 50 巻 12 号 p. 1829-1838
発行日: 1984/12/05
公開日: 2009/06/30
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坪井 邦夫, 川瀬 洋, 坂本 道彦1984 年 50 巻 12 号 p. 1839-1843
発行日: 1984/12/05
公開日: 2010/02/16
ジャーナル フリー以上,当社にて開発されたマスタカヅタの概要を述べた.今後の改良として,ベヅドはレジソコソクリート,送りはリニアモータの採用が考えられる.現実には,0.01μmオーダの測定と評価は非常に困難を伴うが,今後とも技術開発を行い,問題点を1つずつ処理し,精度向上への努力をして行きたい.抄録全体を表示PDF形式でダウンロード (1036K) -
舩越 宣博1984 年 50 巻 12 号 p. 1844-1849
発行日: 1984/12/05
公開日: 2009/06/30
ジャーナル フリー以上,光ディスク材料のあらましと,加工技術の主な点について述べた.
光ディスクは,市販されて間がないが,ビットコストの安さから,現在磁気ディスクが占めている分野の一部に食い込むと共に,新しい使用形態も考えられることから,市場性については非常に高く見積ることができ,量のみならず応用領域の広い技術であると言える.加工技術は,現在のオーディオ用レコードに準拠した形であり,今後,高機能化,量産化に向けて種々の改良や,溝金型の直接形成法等の新加工法の導入が必要となる.抄録全体を表示PDF形式でダウンロード (1454K) -
松林 宣秀1984 年 50 巻 12 号 p. 1850-1856
発行日: 1984/12/05
公開日: 2009/06/30
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1984 年 50 巻 12 号 p. 1856
発行日: 1984年
公開日: 2009/06/30
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吉沢 鉄夫1984 年 50 巻 12 号 p. 1857-1861
発行日: 1984/12/05
公開日: 2009/06/30
ジャーナル フリー以上述べたように,光部品の設計では基本的に微細寸法,高精度が要求されるため,かなり高度の微細加工技術が開発されており,その組合せ,あるいは他分野の加工技術との組合せ,改良により,形状・寸法の自由度が大きい精密部品の設計が可能となり,より高性能,新しい機能部品の開発が期待される.抄録全体を表示PDF形式でダウンロード (1077K) -
中島 巖1984 年 50 巻 12 号 p. 1862-1868
発行日: 1984/12/05
公開日: 2009/06/30
ジャーナル フリー光ファイバの現状を極く簡単に紹介した.紙面の関係で接続技術に触れることが出来なかったので別の機会を期待したい.
光ファイバを用いた種々のシステムの建設数は急速に成長しているが,これは従来の銅線ケーブルによるシステムの問題点とそれらの多くを一挙に解決した光ファイバの多くの利点の重要性を如実に表している.現在光ファイバ通信システムの導入が特に積極的に進められている分野は次のような分野である.
(1)公衆通信網の大容量回線
(2)電力系統用通信網
(3)鉄道・道路用通信網
(4)製鉄等プラント内伝送路
これらの分野においては光ファイバの情報密度の高さ,細径,軽量,無誘導性,高絶縁性等の特長が良く発揮されることが理解できる.今後,光素子,各種センサの開発実用化が進められるにつれ,これらの特長が更に広い領域で認識され,光ファイバの適用分野の拡張が進められるものと考えられる.
次に今後光ファイバの分野で開発検討されるであろう事項を挙げる.光ファイバに関してはこれまでに伝送損失の低減,機械強度の向上等,特性改善の検討が加えられてきたが,ほぼ理論的な限界をも極めたと言え,高い完成度にあると考えられる.今後通信需要が急増する時代を控え,多心化と多心ケーブルを意識した被覆構造の開発が進められる見込みである.一方,光ファイバを集合して構成される光ファイバケーブルにおいては多心ケーブルの構造検討が重要な課題になるとともに,布設環境の多様化に対応すべく,ケーブル機械強度の向上,耐熱性耐環境性の向上が検討されると考えられる.
また小文では触れなかったが,光ファイバの接続は,現在では布設工事中に大きな比重を占めており,解決すべき課題が残されている.光ファイバの接続法は各心ごとに電気放電で加熱融着する工法が一般的であり,多くの機器・工具を要するとともに作業量も多い.今後ケーブルの多心化が進み,システム建設数が増加するとともに接続作業の軽減は極めて重要な課題となろう.このため多数心の光ファイバを一括して接続する工法,あるいはプレハブ光コネクタの開発が進められると考えられる.光ファイバを適用した光ファイバシステムの運用が開始されてから6年余を経過し,その間に注目すべき開発成果を得,システムの設計建設技術も定着した.しかしながら,今後築き上げられるであろう長い歴史の中にあっては現在はまだ緒についたばかりと言うべき状況と考えられる.情報化社会が流行語となり,通信需要が多様化,複雑化しながら増大する中で光ファイバを取りまく技術への社会的要求もまた多様化,複雑化するものと考えられる.今後のこの方面の技術開発に大いに期待するところである.抄録全体を表示PDF形式でダウンロード (1135K) -
泉谷 直幹1984 年 50 巻 12 号 p. 1869-1873
発行日: 1984/12/05
公開日: 2009/06/30
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斎藤 延男1984 年 50 巻 12 号 p. 1874-1880
発行日: 1984/12/05
公開日: 2009/06/30
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久曽神 煌, 成沢 優一, 森 猛, 小林 史典, 豊山 晃1984 年 50 巻 12 号 p. 1881-1884
発行日: 1984/12/05
公開日: 2009/06/30
ジャーナル フリーIt is important to clarify the difference between the true shape of the workpiece and the shape estimated from the chain of measured points, in the three-coordinate measuring machines. In this paper, the roundness was dealt, first of all. Using "min-max method", the evaluation program was made based on the minimum zone conception. Then the roundness was numerically calculated changing the phase of the starting point of the measurementand the sampling interval (number of measured points). As a result, some remarkable facts have been clarified as follows. The decrease of the uncertainty of the calculated roundness, according to the number of measured points. The lower uncertainty less than intended value, as selection of the number of measured points, in the case where the shape was made only from the highest order of frequency component. Namely, the number of measured points N is given as N=2.2M/√G, where M is the highest order of frequency component, and G is the uncertainty.抄録全体を表示PDF形式でダウンロード (844K) -
水谷 卓之, 山本 文雄, 横田 孝夫, 斎藤 勝利, 中畠 良洋, 沢岡 昭1984 年 50 巻 12 号 p. 1885-1889
発行日: 1984/12/05
公開日: 2009/06/30
ジャーナル フリーThis paper presents the optical system design process for an image furnace for use in the First Material Processing Test (FMPT) which will be conducted using the Space Shuttle in 1987. A multi-ellipsoid system was investigated by the theoretical process to determine the best number of ellipsoidal mirrors required. A formula was induced for the attainable system temperature. It was assumed, for easy induction, that spherical light source were being prepared on the first foci for the ellipsoidal mirrors. A spherical black body was being prepared on the common second foci asa heated sample. The relationship between attainable temperature and the conditions inherent in the system was investigated by numerical calculation of the formula. The investigation revealed that two ellipsoid categories with a O. 92 ratio, between major axis length and minor axis length, is most suitable for the FMPT, from the view points of attainable temperature and the dimension of the mirrors. The investigation also clarified that the image furnace with the above mentioned conditions gives a temperature higher than 2000°C with a lesser than 1 kW input power.抄録全体を表示PDF形式でダウンロード (922K) -
家木 俊温1984 年 50 巻 12 号 p. 1890-1895
発行日: 1984/12/05
公開日: 2009/06/30
ジャーナル フリーIn order to perform the high-speed paper feed in printers, it is indispensable to understand the deformation-force characteristics around the feed hole. This paper deals with the dynamic characteristics and the deforming speed's influence theoretically and experimentally. The main results are as follows: (1) Regardless of the deforming speed, the characteristics are composed of the section where the force increases exponentially, the sectionwhere the force increases linearly and the section where the force increases and decreases irregularly. (2) The dynamic and static characteristics can be explained by the model that the paper around the feed hole is composed of the circular stripes. (3) As the deforming speed becomes higher, the deform-force curve extends similarly. Because when the deforming speed is high, the fiber sliding speed and the fiber breaking speed can not follow the deforming speed.抄録全体を表示PDF形式でダウンロード (924K) -
上田 隆司, 細川 晃, 山本 明1984 年 50 巻 12 号 p. 1896-1901
発行日: 1984/12/05
公開日: 2009/06/30
ジャーナル フリーThe heat pulses produced by cutting grains in the grinding zone are measured by some kinds of pyrometers in order to investigate the influence of their response speed on the output. In the infrared radiation pyrometers (I. R. P.), InAs and PbS cells are used as detectors, and the heat signal is received by an optical fiber at the bottom of a small hole which extended nearly to the ground. surface. The results are as follows. Since the thermocouple formed by spot welding is inferior in res ponse speed, it cannot catch faithfully the heat pulses and its signal trace versus time is observed as a smooth curve without peaks. However, thetrace observed by InAs I. R. P. with the highest speed response has many sharp peaks, because this pyrometer can respond the rapid change of temperature. Moreover, the surface temperature estimated by extrapolation of measured values is higher in the latter. The thermocouple method devised by Peklenik can also catch the change of temperature, but it is considered to be basically impossible to respond it correctly. As an application of InAs I. R. P., the grinding temperature distribution in fine ceramic Si3N4 is measured. The peak temperature at 5 pm deep below the ground surface is about 550°C, but the surface temperature cannot be estimated because its gradient is very steep near the ground surface.抄録全体を表示PDF形式でダウンロード (3021K) -
井沢 実, 清水 茂夫1984 年 50 巻 12 号 p. 1902-1906
発行日: 1984/12/05
公開日: 2009/06/30
ジャーナル フリーIn this paper, the life tests of two types of ball splines (nominal diameter 20 mm, number of ball rows 3) are carried out. One is a commercial type which is on the market now. The other is a reformed type which is rounded out by 3 mm in radius at both end portions of the outer sleeve ball grooves so as to improve the ball spline life. The test series for the commercial type and reformed type are made up of 125 ball splines divided into 3 groups and of 30 ball splines divided into 2 groups, respectively. The results are as follows: (1) The life distributions of the ball splines were well conformed to the 3-parameters Weibull distribution function with a Weibull slope 10/9. (2) In the case of the commercial type ball splines, flakings occurred at both end portions of the outer sleeve ball grooves. But, in the case of the reformed type ball splines, flakings occurred at the inner portions of the outer sleeve ball grooves which were parted from both end portions by about 4 to 5 mm in distance. As the result, the median lives of the reformed type ball splines increased about 2 to 3 times compared with those of the commercial type ball splines.抄録全体を表示PDF形式でダウンロード (1099K) -
斉当 建一, 飯坂 孝仁1984 年 50 巻 12 号 p. 1907-1912
発行日: 1984/12/05
公開日: 2009/06/30
ジャーナル フリーThis paper deals with a fundamental consideration on the clamping force in tightening of bolted joint with plastics bolt (Polycarbonate, PC), taking account of application of the torque control method. Tightening tests are carried out for two types of bolted joint which differ in material of nut and bearing plate which are assembled to PC bolt, that is, the material in Type I is PC and Type II is steel under the two conditions of lubricated and unlubricated. First, clamping force which can practically be introduced is clarified in consideration of torsion acting on the bolt shank intightening. Second, possible clamping force is estimated by using the torque coefficient and it is compared with practical one. As the result, following conclusions are obtained: (1) It is possible to obtain higher clamping force by lubricating as compared with unlubricating. (2) The lower limits of possible clamping force under lubricated condition are about 0.84 and 0.60 times as much as proof stress aσ0.2 for Type I and Type II respectively. (3) The clamping force estimated from the torque coefficient agrees well with actual one for Type I under lubricated condition, but those are larger than actual one for other conditions.抄録全体を表示PDF形式でダウンロード (989K) -
新井 典久, 沖田 耕三, 有年 雅敏1984 年 50 巻 12 号 p. 1913-1918
発行日: 1984/12/05
公開日: 2010/02/16
ジャーナル フリーThe purpose of the present paper is to examine the thermal cycles and discuss the influences of thermal cycles upon structure and tensile strength at the butt welding parts of thin stainless plate (SUS 304) by CO2 gas laser. However, there are few researches hitherto which deal with those problems. So, in this paper the authors have measured temperature, structure at the butt welding parts by using of PR thermocouple and electron probe microanalyser. Moreover, the measuredresults of temperature were compared with the experimental results in the case of bead on plate method and the theoretically calculated results. The conclusions are as follows. (1) By this research, the thermal cycles of the welding parts at each welding velocity were shown and the influences of those cycles upon structure and tensile strength of the welding part could be clarified. (2) The experimental values of the temperature at the butt welding parts are higher than those of the case of bead on plate method and theoretical calculation. (3) The practical formula describing the temperature at the butt welding parts is able to derived.抄録全体を表示PDF形式でダウンロード (1565K) -
恒温変態によって生ずるベーナイト組織の被研削性(第1報)貴志 浩三, 江田 弘, 福本 功, 平敷 兼貴1984 年 50 巻 12 号 p. 1919-1924
発行日: 1984/12/05
公開日: 2009/06/30
ジャーナル フリーIn the present study, isothermal transformation temperature, θISO of the carbon steel was changed and grinding force, grinding temperature, grinding ratio, surface roughness, and thickness of ground surface layer of the upper and lower bainite steel were investigated. The results are as follows: (1) Grinding force, grinding temperature and thickness of ground surface layer reduce to the minimum around the boundary temperature θISO of upper and lower bainite structure, whereas grinding ratio increases around this temperature. (2) Both scratching force, P of the material to be cut and energyfor plastic deformation, W, reduce at the boundary temperature of upper and lower bainite structure. This temperature correspond to that stated in (1), at which grindability is most improved. (3) The thickness of plastic deformation of the ground surface layer is most reduced around the boundary temperature of upper and lower bainite structure. Similarly, plastic flow in the direction of grinding is minor around this temperature. The changes are observed corresponding to the temperature at which concavo-convex of tensile fracture faces and sizes of dimple patterns abruptly reduce. (4) Grinding damages such as grinding burns, swell out residual of the grinding surface, etc., are most alleviated at the boundary temperature of upper and lower bainite structure.抄録全体を表示PDF形式でダウンロード (1671K) -
最大切削能力試験法安井 武司, 加藤 辰朗, 折田 三弥彦, 吉田 博幸, 大浦 利夫, 丸山 久男1984 年 50 巻 12 号 p. 1925-1931
発行日: 1984/12/05
公開日: 2009/06/30
ジャーナル フリーThis paper deals with a test of dynamic performance for NC lathes and other turning machines. It is revealed that the maximum cutting capacity of a lathe is determined based on the amount of elliptic component or cylindricity of the workpieces machined. Cutting performance of a lathe isdrawn as a function of the cutting chip area and the overhang of the workpiece. The maximum cutting capacity which divides the area of stable and unstable regions, is statistically evaluated as a function of overhang of the workpiece. A test procedure is established based upon the study and 32 NC lathes were tested. The time required for the cutting test of an NC lathe was about 50 minutes and the variance was less than 10%.抄録全体を表示PDF形式でダウンロード (1038K) -
切断面の粗さについて森 昌幹, 久米原 宏之, 須田 博, 原田 茂義, 武藤 栄作1984 年 50 巻 12 号 p. 1932-1937
発行日: 1984/12/05
公開日: 2010/02/16
ジャーナル フリーSteel (SPCC) and stainless steel (SUS) plates were cut with CO2 laser and the cutting accuracy was studied. As the accuracy kerf width, form accuracy, surface roughness of cut section and so on should be in cosideration, however, among these, particularly the roughness was investigated in detail. Center line average height Ra, and power spectra of surface profile were measured and the effects of work material and cutting condition on the roughness were examined. Also the mechanism producing roughness were discussed. Main results obtained are as follows: (1) The surface texture varies in dependence on kind of work material, cutting speed, position of focal point and pressure and kind of assist gas, also it changes in the perpendicular direction to cutting direction on one surface. Under specified condition many grooves with nearly equal pitch are observed. (2) Value of Ra is about 1 μm for SPCC and 2 μm for SUS under the best condition. (3) Power spectra vary in dependence on the above-mentioned factors, too, and it can very precisely express the characteristics of laser cut surface with relation to abovementioned surface texture. (4) Under the condition using Ar gas compared with using 02 gas laser cutting is difficult and the surface roughness of cut section is large.抄録全体を表示PDF形式でダウンロード (1266K) -
砥石の損耗挙動久留須 誠, 安井 平司, 宮原 一郎1984 年 50 巻 12 号 p. 1938-1943
発行日: 1984/12/05
公開日: 2009/06/30
ジャーナル フリーThe present report investigates the wheel wear behavior in cylindrical traverse grinding in high depth of cut. Even in initial cylindrical traverse grinding in high depth of cut, a large and deep wheel wear of step type results at the edge of the wheel side which grinds the workpiece at the beginning. As grinding proceeds, the wheel wear becomes as deep as the depth of cut and widens tothe opposite side. The wear shape varies gradually from the step type to the straight type. The harder the grinding conditions are set up and the softer the grade of grinding wheels is, the more rapidly the wear shape of grinding wheel varies because of the increase of bond and grain fractures. The variation in loading changes together with cutting edge spacing, and therefore the loading has influences on the bond and grain fractures.抄録全体を表示PDF形式でダウンロード (1275K) -
反射光による加工現象の観察と溶接のモニタリング石田 修一, 下井 泰典1984 年 50 巻 12 号 p. 1944-1949
発行日: 1984/12/05
公開日: 2009/06/30
ジャーナル フリーLaser light reflection in pulsed YAG laser welding and a monitoring method of laser welding are investigated. Pulsed YAG laser welding involves several processes such as surface melting, beamhole forming, beam-hole vanishing, and solidification. During a pulse, the reflectivity changes with each process. The reflectivity of a cold rolled plate is about 40% of the polished surface. The molten surface reflectivity is about 80% of the polished 'one. In the cold rolled plate, reflection of laserlight increases with the surface melting. Laser light comes to be absorbed efficiently when the beam-hole is formed. By observing the change of the reflected light intensity, it is possible to detect a timing when the beam-hole is formed. By using the time from laser irradiation to the beam-hole forming, power density of irradiated laser beam can be estimated. In the lap joint, when the beamhole has penetrated an upper plate, transient increase of the reflected light is observed. A gap malfunction in the lap joint can be detected by the excessive increase.抄録全体を表示PDF形式でダウンロード (3052K) -
新谷 一博, 藤村 善雄, 河端 裕, 五十嵐 正, 鴻野 雄一郎, 柴田 宗一1984 年 50 巻 12 号 p. 1950-1955
発行日: 1984/12/05
公開日: 2009/06/30
ジャーナル フリーThe CBN tool can be used for a fine cutting of hardened steel in turn for grinding. However, for an intermittent cutting, this tool comes often to over the life in an extremely short time owing to occurrence of cutting edge break. In this paper, so as to get long tool life and good surface finish, influences of tool geometry, collision means of tool with workpiece and frequency of collision are investigated. As a result of these consideration, a new tool of very long life was contrived. Main results are as follows: (1) In cutting of the shaft with two key ways the tool reached life because of flank wear. A recommendable negative land angle is around from 25° to 35°. (2) In cutting ofthe spline shaft having many collisions in number, the tool life is over in a very short time due to an edge failure. A break happens on flank face when the tool collides at tool face (Type I), and a flaking on tool face when at cutting edge (Type II). The latter gains an advantage over tool life and surface finish, and yet its life is short. (3) The new tool has a land on flank face, and is used for cutting of a spline shaft. Its failure manner is Type II. A flaking happens on the face successively at some time interval, and the cutting edge is selfsharpened at each time. Due to this action the tool life was much prolonged by 17 times of the case (2). (4) In the above case, when lifted the real cutting edge after flaking up to the initial edge height at a suitable time interval, the tool life increased further by 26 times.抄録全体を表示PDF形式でダウンロード (1315K)
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