巻号一覧
後続誌
40 巻, 479 号
選択された号の論文の15件中1～15を表示しています
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ガラス繊維強化硬質塩化ビニル樹脂の切削加工井上 久弘, 井戸 守1974 年 40 巻 479 号 p. 1035-1041
発行日: 1974/12/05
公開日: 2009/06/30
ジャーナル フリーThis paper describes the effect of the cutting speed on the tool wear and surface roughness of the glass fiber reinforced polyvinyl chloride comparing with the glass fiber reinforced plastic. The main results obtained are as follows:
(1) In the plastic composite materials, the matrix gives the big effect for the shape of the chip and the surface formation of the composite materials, while the element gives the big effect for the tool wear and the heat generation in cutting.
(2) The tool wear in case of F. R. P. V. C. is nearly same as that in case of F. R. P. except the wear width on rake face. The wear width on rake face is mainly influenced by rake angle in lower cutting speeds (500-1 400 m/min), while that is nearly constant in higher cutting speeds (2 200-2 900 m/min).
(3) The chips are the continuous types and the crack appears at near the elements in high speed range.
(4) The surface roughness is increased rapidly until the 1 400 m/min cutting speed, but the rate of increasing decreases in the higher speed range.抄録全体を表示PDF形式でダウンロード (2065K) -
中村 覚, 西沢 潤一, 高橋 香1974 年 40 巻 479 号 p. 1042-1047
発行日: 1974/12/05
公開日: 2010/02/16
ジャーナル フリー(1)ズームレンズを使用して超細密図形の投影を行っても縮写倍率1/10～1/80の範囲で原図有効画像を3cm以上で解像力125本/mm以上,感光幅4μm以下の鮮明な感光図形が得られた.
(2)倍率を変えた時の焦点位置のずれも焦点深度内であった.
(3)ズームレンズと高解像力レンズとを組合わせて図形の投影をしても縮写倍率1/250～1/2000の範囲で1000本/mmの目標解像力に対して833本/mm,0.6μm幅の解像力が実現できた.集積回路に使える程度の鮮明な図形としては417本/mm,1.2μm幅の図形が得られたので500本/mmぐらいまで可能と思われる.
(4)焼付面からの反射を利用した自動焦点調整装置を試作し,焦点からのずれ0.5μm以内で50回/s以上の速度で焼付させることができた.
(5)ズームレンズを使用しない場合は自動焦点調整を応用して縮写を行うと1/10μmのけたの精度のいる図形が焼付けられるものと考えられる.
(6)今後更に自動焦点調整を0.2μm以下にすることができると考えているが,0.1μmの幅までの図形を高縮写倍率で投影できるものと予想される.このようなときには乾板,フォトレジストなど薄い感光剤を使うことになろうが,それまで,最適結像位置を決めるために,乳剤の厚み方向に対する黒化度の分布を調べる必要がある.また1/10μmの精度の図形の場合どのようにして検査するのがよいのかも検討を要する.抄録全体を表示PDF形式でダウンロード (1481K) -
特殊メタルボンド砥石に関する研究(第1報)鈴木 郁男, 今井 智康1974 年 40 巻 479 号 p. 1048-1053
発行日: 1974/12/05
公開日: 2009/06/30
ジャーナル フリーUnique metal bonded grinding wheel which is different from the metal bonded grinding wheel made by sintering copper and brass powders along with the grinding grains, has been developed through a process wherein grinding grains and annex materials are bonded by Ni-P alloy obtained through electroless Ni-P deposition. In this paper, the mechanical characteristics of electroless Ni-P deposit is investigated as well as the strength of the grinding wheel is measured through the bending force thereof. The main results obtained are as follows :
(1) Electroless deposition alloys 92 Ni-8 P and 95 Ni-5 P change their mechanical characteristic, such as hardness, size, and tensile strength in accordance with heat treatment temperature, particularly, the alloy 92 Ni-8 P shows a bigger shrinkage.
(2) The metal bonded grinding wheel using the alloy 95 Ni-5 P shows about 10 kg/mm2 at the bending strength and is destroyed at 210 m/s of peripheral speed.
(3) The unique metal bonded wheel has been proved to have grinding abilities that grinding force is not more than 1/4 and grinding ratio is more than 20 times, compared with a conventional metal bonded wheel in grinding operations on carbon steel S 45 C.抄録全体を表示PDF形式でダウンロード (1425K) -
堀井 健, 友田 泰行1974 年 40 巻 479 号 p. 1054-1060
発行日: 1974/12/05
公開日: 2010/02/16
ジャーナル フリー以上を要約すると次のようになる.
(1) 本法は微小ビッカースかたさ試験法と比較して1回の圧子押込み試行により深さ方向の情報が迅速かつ連続して得られる利点がある.膜厚計測における測定器の精度は押込み量1μmで,荷重は1gまで到達可能であり,実験条件(加圧速度,摩擦,粒度等)による影響は認めがたく,表面あらさは3μm以下が望ましい.しかし実験条件に関してはさらに検討する必要がある.
(2) 本法によるかたさ値は荷重-押込み曲線の二階微分値で表される.素地材の荷重-押込み曲線は2次式となり,表面層を有する試料では,表面層と素地材おのおのの荷重-押込み曲線間のなめらかな移行が成立し,荷重変化率は,stage I-stage II-stage IIIの3段階であることがわかった.stage Iはめっき層自身のかたさ変化を表し,stage IIはめっき層と素地材境界面内における変形流動の影響を受けたものとなり,stage IIIは金属素地のみのかたさ変化を表す.
(3) 素地金属およびめっき膜のかたさ値は荷重変化率曲線の傾きに相応し,計測誤差は5%と考えられる.めっき膜厚は対面角の異なる圧子を2,3選んで求めればよく,その計測誤差は10%である.
(4) 圧子の対面角による検出度について定性的には,めっき膜が素地材よりかたいとき対面角の小さい方が検出感度は良く,逆の場合には対面角の大きい方がよい.抄録全体を表示PDF形式でダウンロード (1437K) -
宇根 篤暢, 大森 義市, 田中 義信1974 年 40 巻 479 号 p. 1061-1066
発行日: 1974/12/05
公開日: 2010/02/16
ジャーナル フリーIn this paper, the correlation between the properties of sintered iron and the cutting phenomena is reported. For this purpose, the compressive stress-strain diagram in high-strain region of the sintered iron is found and the application of von Mises' yield condition to it is investigated, considering the relation between the compressive strain and the yield shear stress. Moreover, the cutting mechanism during high cutting speed and the average shear stress on the shear plane were also investigated.
The results obtained are as follows:
(1) The stress in the lower yield point of the sintered iron is extremely small and is about a half of the stress in a metal of the same component. This is brought about by the reduction of the effective sectional area and the strength of the grain boundary.
(2) The Poisson ratio in the plastic region approaches a value of 0.5 relative to an increase of the compressive strain.
(3) The shear zone at a cutting speed of 180 m/min is extremely large and is of the width about 0.08 mm, which is about twice that of the mild steel.
(4) The mean shear stress is 50-55 kg/mm2.
(5) The correlation between the properties of the sintered iron and the cutting phenomena is extremely higher after the effect of friction is compensated.抄録全体を表示PDF形式でダウンロード (1349K) -
弾性接触および摩擦機構に関する実験的検討鏡 重次郎, 山田 国男, 武田 信男, 直井 貞司1974 年 40 巻 479 号 p. 1067-1072
発行日: 1974/12/05
公開日: 2009/06/30
ジャーナル フリーThe experimental investigations are carried out in regard to the mechanisms of elastic contacts which were introduced in 1st and 2nd report.
The main results obtained are as follows:
(1) The distribution of asperity heights appearing on the surface profile curve and the real distribution of them conform more satisfactorily to Gamma or Rayleigh distribution than the normal distribution.
(2) The real contact area and the number of contact spots between rough and flat surfaces agree qalitatively with the calculated values. The approaches between the rough surfaces also agree qualitatively with the calculated values.
(3) The shearing strength of Pyrex glass at the contact areas is about 100 to 140 kg/mm2.抄録全体を表示PDF形式でダウンロード (3589K) -
福田 理一, 常盤 徹1974 年 40 巻 479 号 p. 1073-1078
発行日: 1974/12/05
公開日: 2009/06/30
ジャーナル フリーThe relation between amplitude and frequency of workpiece in external-grinding is analysed in a single degree-of-freedom system with contact and grinding stiffnesses and examined experimentally in plunge-grinding. As a result of analytical investigation it is derived that with increase in amplitude the frequency of workpiece decreases, slightly in smaller amplitude due to the property of contact stiffness, and considerably in larger amplitude due to the loss of contact between workpiece and grinding wheel for a part of the cycle of vibration of workpiece. Then, applying Laser projected to the cutting zone tangentially to workpiece and grinding wheel, the phenomenon of this loss of contact can be directly observed in considerably larger amplitude of workpiece than the depth of cut. And from the results of plunge-grinding tests it can be seen that experimental values about amplitude and frequency of workpiece are relatively close to the analytical values, especially at the smaller depth of cuts. In this report the grinding stiffness is determined from the steady normal grinding force in plunge-grinding under various depth of cuts.抄録全体を表示PDF形式でダウンロード (1115K) -
ラジアルすきまがある場合の負荷分布理論井沢 実, 清水 茂夫1974 年 40 巻 479 号 p. 1079-1086
発行日: 1974/12/05
公開日: 2009/06/30
ジャーナル フリーThe linear motion ball bearings which perform guide action of the reciprocating motion round shaft, provide the characteristics of a less frictional resistance and also a greater simplicity of lubrication and maintenance than that of slide bearings. Then, the linear motion ball bearings have been used now widely in many kinds of machine. When some radial load is applied to the shaft supported by the bearing, the combined working load of both moment and radial load is carried by that bearing, and many cases of practical application of the bearing correspond to that situation. For such load condition of the bearing, load distribution acting on each balls is quite different from the one of which radial load is applied only to the bearing, and maximum distributed load reaches readily to value of several times of the latter case. These results have great influence on the bearing life, moreover affect considerably to the bearing operating capacity. This paper deals with theoretical analysis of load distribution regarding to cases of symmetrical and asymmetrical arrangements of ball row in the linear motion bearing which supports both moment and radial load and has some radial clearances, varying the number of balls of each ball row.抄録全体を表示PDF形式でダウンロード (1231K) -
ベルト研削に関する研究(第4報)難波 義治, 津和 秀夫1974 年 40 巻 479 号 p. 1087-1092
発行日: 1974/12/05
公開日: 2009/06/30
ジャーナル フリーBasing on the results of scratch-deformation experiment using a single abrasive grain, the grinding process performed by the abrasive belt involving a large number of cutting edges which differ in shape was analyzed in view of the depth of cut. This analysis was done using computer simulation and the results were examined from the grinding experiment. Regarding these results, the depth of cut which coincides with the actual value is calculated by substituting the machining conditions, the variables indicating the state of the cutting edges of the coated abrasives and the decided constant obtained from the mechanical properties of the workpiece to the simulation of the grinding process. Moreover, it may be possible to predict the life characteristic of the abrasive belt in the case of grains changing due to the wear only. The difference of the depth of cut depending on the state of contact between the belt and the workpiece is made clear systematically from the change in the number of cutting edges per contact area.抄録全体を表示PDF形式でダウンロード (1019K) -
林 巌, 林 輝1974 年 40 巻 479 号 p. 1093-1098
発行日: 1974/12/05
公開日: 2009/06/30
ジャーナル フリーA spectrum of the transmission error was measured and studied, due to a run out error and due to an axial run out error as a lower component of the transmission error and due to a pressure angle error, which is a typical tooth profile error, as a higher component with a method for measurement of a spectrum of the transmission error reported previously. The following results were obtained:
(1) The spectrum of a lower component shows approximately the static transmission error.
(2) The spectrum of a higher component is added a dynamic influence due to a torsional vibration of an experimental apparatus at a higher revolutional speed.抄録全体を表示PDF形式でダウンロード (1040K) -
斜めの方向に振動が作用する場合の輸送岡部 佐規一, 横山 恭男, 神保 泰雄1974 年 40 巻 479 号 p. 1099-1104
発行日: 1974/12/05
公開日: 2009/06/30
ジャーナル フリーIn this paper, vibratory conveying is treated where the vibration of conveying trough has both components in a direction of slope and in a horizontal direction right angle to the slope, as well as the component perpendicular to the surface. Results are useful for control of conveying direction, which is often needed in automatic assembly. When particles are conveyed without jumping on a vibratory surface, the sliding motion of particles changes its direction continually as the time proceeds. Equations of motion are expressed by a set of two nonlinear differential equations. Basic type of motion is classified into four modes and the classification of these modes is determined by two dimensionless quantities Qaψ, and Obψ. These quantities correspond to Qa and Qb respectively which were discussed in previous reports. Mean conveying velocity and mean conveying direction are calculated numerically by digital computers. These results show that the particles can be conveyed in any assigned direction on the vibratory surface. For example traversing the inclined surface is possible. These theoretical results agree well with the experimental ones.抄録全体を表示PDF形式でダウンロード (1079K) -
外部熱源による影響垣野 義昭, 奥島 啓弐1974 年 40 巻 479 号 p. 1105-1110
発行日: 1974/12/05
公開日: 2009/06/30
ジャーナル フリーThermal deformations of machine tools and works due to external heat sources, especially ambient temperature change and air flow, are studied in this paper. The analyses are conducted with the finite element simulations and measurements of those of existing machines and works. From this study the following conclusions are obtained.
(1) The decrease of machining accuracy due to ambient temperature change is caused by pure longitudinal expansion of machine and work, and the bending of machine column. Generally, the effect of bending is larger than that of longitudinal expansion, if works are not too large.
(2) To prevent the bending of the column, the consideration of the thermal symmetry of the column alone is not enough, but thermal symmetry of whole structure including knee, bed, head, etc. must be included.
(3) Rapid change in air flow causes large thermal deformations. But on the other hand, a stagnant atmosphere produces large local temperature difference up to an order of several degrees centigrade. To optimize the situation, a steady and uniform air flow is essential.抄録全体を表示PDF形式でダウンロード (1125K) -
剛体球の押込みの場合神宮 利夫1974 年 40 巻 479 号 p. 1111-1117
発行日: 1974/12/05
公開日: 2009/06/30
ジャーナル フリーIn this paper, the effect of friction on the stress distribution at the interface and beneath the spherical indenter in the course of indentation process is investigated by introducing the problem of friction into the elastic analysis. As a result of analysis, it is seen that the effect of friction on the stress distribution is very much marked in the vicinity of interface, but in a considerable distance from the region of interface, is independent of friction. The region of the maximum value in the maximum shearing stress calculated by the stress component approaches the interface with the increase of coefficient of friction and the stress value also increases.抄録全体を表示PDF形式でダウンロード (941K) -
横川 和彦1974 年 40 巻 479 号 p. 1118-1124
発行日: 1974/12/05
公開日: 2010/02/16
ジャーナル フリー将来の研削として設計を行う場合,研削加工システムとして考えなければならない研削能率を考慮した研削精度を支配する要因は表1に示すものとなる.実際,量産部品でない場合の寸法精度は0.5μm,真円度は0.1μm,円筒度は0.5μm,表面あらさRz0.01μmを研削で得ることは容易である.しかし実際の量産高能率研削での精度は真円度1.5μm,表面あらさ1.6S,寸法ばらつき0.01mmは高精度というべきだと思う.抄録全体を表示PDF形式でダウンロード (2223K) -
松井 正己1974 年 40 巻 479 号 p. 1125-1127
発行日: 1974/12/05
公開日: 2009/06/30
ジャーナル フリーPDF形式でダウンロード (471K)
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