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42 巻, 496 号
選択された号の論文の11件中1～11を表示しています
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清水 茂夫, 井沢 実1976 年 42 巻 496 号 p. 328-332
発行日: 1976/05/05
公開日: 2009/06/30
ジャーナル フリーIn this paper, the load distributions in the linear motion ball bearings, varying the radial clearances for the shaft from positive to negative value, were measured by means of strain gages bonded on the elastic beam type detecting units which were machine-worked on the outer sleeves of bearings. Then, the measured values weres compared with the theoretical analyzed and calculated results, reported already in 1st and 2nd reports, and after some discussion following results were obtained.
(1) Fairly good agreement were obtained between measured and calculated values of the load distribution and the maximum distributed load in bearings.
(2) When some radial clearance exists in the bearing and the eccentricity rate of external force for bearing becomes greater than unit, the maximum distributed load increases extremely and the stiffness of bearing decreases considerably owing to most of force is supported by two balls situated respectively at up and down ball tracks of bearing both ends.
(3) Because the external force is supported by many balls in bearing provided the bearing is preloaded, then the maximum distributed load goes down considerably, moreover the stiffness of bearing is improved.抄録全体を表示PDF形式でダウンロード (1250K) -
外周旋削加工の真円度隈部 淳一郎, 秋沢 信行, 会沢 利夫, 有賀 昇1976 年 42 巻 496 号 p. 333-339
発行日: 1976/05/05
公開日: 2010/02/16
ジャーナル フリーThe ultimate purpose of this study is to create a new lathe by which roundness≈0, cylindricity≈0 and and surface roughness≈0 can be obtained in turning of aluminium alloy, copper alloy, iron, steel, and so on. At first, in this report, it is analyzed theoretically roundness≈0 turning can be realized by combining the insensitive vibration cutting mechanism and the main spindle system with the hydro-static bearing. And this analytical result can be confirmed by the experiments using a newly developed vibration cutting lathe with the improved main spindle of the cylindrical grinding machine with the hydro-static bearing. The main cutting conditions are as follows: the vibration tool ; in the same direction as that of cutting, frequency ; 21. 52, 28. 72, 30. 15 kHz, amplitude ; 13, 18, 26 rim, cutting speed ; 12, 27 m/min, depth of cut ; 0. 03, 0. 05 mm, feed ; 0. 02, 0. 05, 0. 08 mm/rev, cutting tool material and profile ; carbide tool K 10, (0°, 0°, 8°, 5°, 6°, -4°, 0 mm), (0°, 0°, 10°, 10°, 50°, 40°, approximately 1 mm), etc. Aluminium HB = 26, brass HB= 124, carbon steel HB = 155, stainless steel HB=179 are used. The main results are as follows: 1) The roundness value is decreased to about 1/2-1/10 of that of the conventional cutting lathe by means of the ball or roller bearing. 2) Roundness of 0.4 μm is obtained in these materials. This value of 0.4 μm has made a new record in turning. 3) By this study, it is proved that this new lathe combining the vibration cutting and the hydro-static bearing has the possibility of roundness≈0 turning.抄録全体を表示PDF形式でダウンロード (1657K) -
白樫 高洋, 臼井 英治1976 年 42 巻 496 号 p. 340-345
発行日: 1976/05/05
公開日: 2009/06/30
ジャーナル フリーThe paper describes a method for predicting the orthogonal metal cutting quantities such as shear angle, cutting forces, distribution of cutting temperature, and those of stress and strain without any cutting experiment. The method proposed is the simulation analysis of cutting process with aid of digital computer. The equations of equilibrium, plastic flow rule, heat transfer together with the characteristics of material strength and friction on the tool face, obtained from independent material tests, are solved simultaneously in the form of the finite element method. The predicted quantities are verified to be in good agreement with experi-mental results.抄録全体を表示PDF形式でダウンロード (1086K) -
魚里 博, 副島 吉雄1976 年 42 巻 496 号 p. 346-350
発行日: 1976/05/05
公開日: 2009/06/30
ジャーナル フリーConventional interferometric photoelasticity is a well established and elegant method: however, its use is laborious and requires very great skill in practical use. In this paper, a simple interferometric photoelasticity by using the moiré technique is discussed in detail. It is described theoretically and experimentally that the imperfection of the optical elements and the photoelastic model is eliminated by using the moiré technique. In this method, the true information about the stress state of the photoelastic model is obtained as the moiré pattern by superposing the interferograms of the unstressed and stressed states through the imperfect optical system and the non-parallel plate model. The described method is closely related to holographic photoelasticity, but it is usually simpler and applicable to practical use.抄録全体を表示PDF形式でダウンロード (1242K) -
堀井 健, 友田 泰行, 山田 朝治1976 年 42 巻 496 号 p. 351-357
発行日: 1976/05/05
公開日: 2009/06/30
ジャーナル フリー結果を要約すると次のとおりである.
(1)くさび面に作用する平均接触圧力および押込みによる変形形態は材料の予ひずみに依存する.
(2)平均接触圧力ならびにその降伏応力比の実験1直は圧縮型押込みとみなせる場合(くさび角が120°～150°の範囲)において理論値と15%内で一致する.しかし切削型押込みないしは圧縮型押込みであっても圧痕面に局部変形が生じる場合(き裂型押込み)には,実験値と理論値の差は大きくなる.母材の平均接触圧力は0.2%ひずみに相当する応力を降伏条件とみなすことによって求めることができる.
(3)ポンチ押込みの弾性解を利用して求められる変形領域は押込みによる変形領域を知る上でかなり有効であり,変形領域の模式図は圧痕断面上で求めたかたさ分布図に近い.また焼鈍材のような予ひずみの小さい材料の変形領域は従来のすべり線場から考えられるものよりかなり大きいことがわかった.抄録全体を表示PDF形式でダウンロード (1442K) -
工具と工作物の接触開始点近傍における過渡現象宇野 義幸, 津和 秀夫1976 年 42 巻 496 号 p. 358-363
発行日: 1976/05/05
公開日: 2009/06/30
ジャーナル フリーIn the transitional cutting process such as milling or grinding, there exist transient regions (elastic deformation region and plastic deformation region) in the initial part of contact between tool and workpiece. These regions are left in the finished surface and affect the surface generation mechanism. From the above point of view, a model experiment is conducted to account for the mutual interference state between tool and workpiece. Variations of cutting forces and various residual stocks in the elastic, plastic and cutting region in the initial part of contact are analyzed experimentally. Furthermore, the effects of different machining conditions on the sliding phenomenon of a cutting edge are investigated. The results show that the sliding length decreases with an increase of the interference angle, and that plastic deformation and cutting begin at respective constant depth. It is also found that the sliding length increases with an increase of the width of cut and the nose radius of a cutting edge, while the sliding length decreases with an increase of the system stiffness.抄録全体を表示PDF形式でダウンロード (1182K) -
ならい機構諸元の影響加藤 仁, 山口 勝美, 丸井 悦男1976 年 42 巻 496 号 p. 364-369
発行日: 1976/05/05
公開日: 2009/06/30
ジャーナル フリーThe effect of dimensions of hydraulic copying control device using throttle valve on the copying accuracy is minutely investigated in the tapering and machining a square shoulder, from the points of the response velocity and the moving force a:ting on copying piston. The factors (dimensions of copying control device) which influence the accuracy of tapering or machining a square shoulder are clarified analytically. And using this result, the approximate equations are obtained to estimate the dynamic characteristics of the hydraulic copying control device using throttle valve. These equations are useful in the design of hydraulic copying control device.抄録全体を表示PDF形式でダウンロード (1068K) -
林 巌, 林 輝, 永嶋 慎一, 木村 康治1976 年 42 巻 496 号 p. 370-375
発行日: 1976/05/05
公開日: 2009/06/30
ジャーナル フリーIt is difficult to obtain a characteristic, periodical signal of gears, that is, the transmission error, as many irregular signals due to lubrication, frictional losses and so on are relatively larger and involved. This report tries to obtain the transmission error by processing method with average, using a new developed machine which can directly and rapidly show an error spectrum and phases of the static transmission error.
(1) The processing method with average is very useful to obtain the transmission error of gears during rotation.
(2) The limit of rotational speed to measure the static transmission error of the above mentioned machine is about 300 rpm, and agrees with the theoretical limit. Therefore the limit can be estimated theoretically in general case.
(3) The dynamic motion of gears, which have a known static transmission error, obtained by the experiment agrees with the theoretical motion. Therefore the measured values by the above mentioned machine are very useful to estimate any motion of gears.抄録全体を表示PDF形式でダウンロード (1365K) -
砥粒切れ刃の切削性能に関する研究(第1報)松井 正己, 庄司 克雄, 田牧 純一1976 年 42 巻 496 号 p. 376-381
発行日: 1976/05/05
公開日: 2009/06/30
ジャーナル フリーA new method for measuring accurately the wear depth of a single abrasive grain in the "fly-milling test" is introduced. The wear in the method was measured on the basis of the tip of a diamond tool which was mounted at a short distance away in the direction of the wheel axis. A change in shape of the cutting point was observed simultaneously with it. Cutting force pulses were furthermore measured with a piezo-electric dynamometer. The self-sharpenability of cutting points is discussed on a basis of these results. Some results obtained in this paper are summarized as follows:
(1) The wear curve of cutting point is generally similar in shape to a flight of stairs with a gentle slope.
(2) Wear rates of individual grains are highly variable.
(3) Rate of wear by fracture of cutting points increases with increasing radial depth of cut, but rate of attritious wear is independent of it.
(4) Self-sharpenability of cutting point is affected by a combination of grit and workpiece material.
(5) Self-sharpenability of white aluminum oxide grits is better than that of green silicon carbide grits.抄録全体を表示PDF形式でダウンロード (1203K) -
サイクロイド歯車の研削津田 展宏, 石川 二郎, 福田 康正1976 年 42 巻 496 号 p. 382-385
発行日: 1976/05/05
公開日: 2009/06/30
ジャーナル フリーMany kinds of gear tooth profiles and teeth combined with different profile curves, have been proposed. Otherwise, how to manufacture their profiles has ever been reported little. Even if the dressing apparatus, belonging to the well-known involute gear grinding machine, which can grind the modified involute tooth profiles, is used, it is impossible to manufacture particular tooth profiles other than involute tooth one. Here, the compound cycloidal tooth profile which has never been reported to grind, is made trial of manufacturing by means of N/C gear grinding machine developed by authors. The specifications of ground cycloidal gear are shown as follows : number of teeth 48, pitch diameter 96 mm, radius of rolling circle 4.8 mm, and both addendum and deddendum are 2 mm. Inspection of ground gears is held by means of the single frank meshing tester, which is newly developed applying digital computer. Two cycloidal gears composed of the same dimension are ground and meshed. The results of inspection is 60 seconds while 10 teeth profiles are meshed.抄録全体を表示PDF形式でダウンロード (927K) -
鈴木 正根, 金谷 元徳, 鈴本 喜義1976 年 42 巻 496 号 p. 386-391
発行日: 1976/05/05
公開日: 2009/06/30
ジャーナル フリーPDF形式でダウンロード (1877K)
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