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47 巻, 10 号
選択された号の論文の19件中1～19を表示しています
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稲葉 清右衛門1981 年 47 巻 10 号 p. 1185-1191
発行日: 1981年
公開日: 2009/06/30
ジャーナル フリーPDF形式でダウンロード (1984K) -
鋼の立軸平面重研削の研究福井 保夫1981 年 47 巻 10 号 p. 1192-1197
発行日: 1981年
公開日: 2009/06/30
ジャーナル フリーIn the vertical spindle abrasive machining of steels, the grinding wheel is not dressed usually since it is self-sharpening. The grinding process rapidly becomes the steady state after the start of downfeed. The distribution of abrasive grains in the steady grinding process varies with the grinding conditions. In this paper, the effects of grinding conditions on the distribution of abrasive grains with relation to the grinding force and the wheel wear are investigated experimentally, and the following conclusions are drawn. In the steady grinding process the distribution of abrasive grains, in spite of the initial state of wheel active face, depends on the grinding conditions. The number of abrasive grains per unit area is relatively high for the work materials producing higher specific grinding force. And, it decreases as the wheel grade is decreased and the downfeed rate is increased. The grinding force nearly corresponds to the number of abrasive grains per unit area. The grinding force 1s low for the work materials making the number of abrasive grains per unit area decrease. The number of cutting point per unit area decreases as the average length of chip is increased, and the specific wheel wear increases. This tendency is remarkably seen for the work materials making the number of abrasive grains per unit area decrease.抄録全体を表示PDF形式でダウンロード (1125K) -
単一ニードルによる切削実験渡辺 裕司, 長尾 高明, Theodor STOFERLE1981 年 47 巻 10 号 p. 1198-1202
発行日: 1981年
公開日: 2010/02/16
ジャーナル フリー以上の単一ニードルによる切削実験によって得られた知見を列挙すると,
(1) 単一ニードルの切削では切削速度と切込み設定深さの組合せにより被削材が削られる条件領域と切削が全く行われない条件領域があることがわかった.切削が行われない場合のニードル切れ刃は被削材表面に強く押さえつけられて,高速度でこすられるため著しく摩耗する.前者を切削領域,後者を摩滅領域と呼ぶことにした.
(2) 切削領域でのニードル先端の切れ刃の摩耗状態と,摩滅領域でのそれとは著しく異なる.前者は主に切削熱による凝着摩耗であり, 後者は引っかき摩耗によるものだろうと考えられる.
(3) 切削速度が大きく, 切込み設定量が大きい程切削が起こりやすいことがわかった.
(4) 切削が行われた時の切りくずはいつも連続型であり, すくい角の変化(0°から-20°)が切削力に及ぼす影響は本実験では認められなかった.ニードル径0.5mm,切削速度90 m/min,送り速度0.9mm/rev,被削材材質DIN St 37の時切削主分力Pr(N)と背分力PN(N)は真の切込み深さ9(mm)に対して
Pr=478×103g1.3
PN=3.57×103g
で表現できる.実現した最小切込み深さは3μmであった.
(5) 切削速度が上昇すると一般に切削力は減少することがわかった.抄録全体を表示PDF形式でダウンロード (1032K) -
吉村 允孝, 近藤 敏郎, 小杉 健一1981 年 47 巻 10 号 p. 1203-1209
発行日: 1981年
公開日: 2009/06/30
ジャーナル フリーA method has been developed for identifying the equivalent spring stiffnesses and damping coefficients between contact surfaces of sliding joints which could be generally applied for the analysis of static rigidity, vibrational characteristics and feed drive performance at the design stage of machine tools or general machines. The results obtained by the method are described. The method uses the impulse excitation on measurement models which are set-up so that the effects of uncertain factors such as clamping parts and driving units can be excluded from the measured values, and the heretofore unattainable values of the joint interface itself can be extracted by the described computer simulation of measurement models. The equivalent spring stiffnesses and damping coefficients in both the shear and normal directions at the interface are identified for parameters of sliding velocity and mean contact pressure. The results obtained from the models having contact surfaces of turcite and steel clarify and determine the effects of the sliding velocity and magnitude of the mean contact pressure which are very different in the shear and normal directions of the interface respectively.抄録全体を表示PDF形式でダウンロード (1466K) -
水兼 正博, 古川 勇二, 塩崎 進1981 年 47 巻 10 号 p. 1210-1215
発行日: 1981年
公開日: 2009/06/30
ジャーナル フリーThe scale model of a pneumatic half-floating slideway is designed and manufactured according to the design procedure which was reported in the previous paper. And the design purpose, which is to keep the slideway frictional force constant independent of the applied load and feed, was funda-mentally satisfied through the experiment by this scale model. Furthermore, this slideway can bring some additional merits, that is, the amount of slider's float is negligible, the stiffness can be in-creased and even the attitude of the slider can be improved if the load compensator is applied for each slideway pad.抄録全体を表示PDF形式でダウンロード (1191K) -
静剛性および安定性に関する理論と実験里見 忠篤1981 年 47 巻 10 号 p. 1216-1222
発行日: 1981年
公開日: 2009/06/30
ジャーナル フリーThe purpose of this study is to present theories on the static rigidity and stability practically applicable to the design of the hydro-static guiding system with air which is increasingly adopted to machine tools, measuring machines, etc., recently. The feature of this study is that the orifice throttle theory is applied in the region of larger land clearance, and the ring shaped throttle theory in the region of smaller one respectively, and their boundary is clarified theoretically. These theories are developed in both cases of with and without air pocket at the front of the orifice nozzle. The results are as follows : (1) The minimum depth of the air pocket where performance of the orifice does not fail can be determined. (2) The range of land clearance where the value of static rigidity is held relatively high and self-excited vibration does not occur can be determined. (3) Experimental values showed fairly good agreement with the theoretical ones.抄録全体を表示PDF形式でダウンロード (1410K) -
長谷川 嘉雄, 奥山 繁樹, 今井 正彦1981 年 47 巻 10 号 p. 1223-1228
発行日: 1981年
公開日: 2009/06/30
ジャーナル フリーIn order to forecast and control the effect of grinding heat, it is necessary to explain the ratio of conducted heat into workpiece to the heat generated in grinding Rw. Then in this report, Rw is experimentally obtained by measuring the temperature distribution of the workpiece, the grinding forces, the wheel speed and the depth of cut. The partition ratio of grinding heat when a grinding burn occurs with a wear of the wheel is also theoretically investigated. Consequently the following results are obtained. (1) When hardened steel is ground by alumina wheel, Rw is about 70% and this value decreases with the depth of cut and the area proportion of flank wear to grinding surface η but this value is hardly influenced by the wheel speed, the work speed, the grain size and the hardness of the grinding wheel. (2) Theoretical values of the partition ratio that are derived in previous report agree with the above experimen-tal results. (3) In order to reduce the heat conduc-tion per unit surface area of the workpiece, it is necessary to grind with a wheel of small grain size and low hardness operating with a low wheel speed and a small depth of cut.抄録全体を表示PDF形式でダウンロード (1166K) -
浅井 毅, 飛岡 正明, 土井 良彦, 高橋 宣裕1981 年 47 巻 10 号 p. 1229-1233
発行日: 1981年
公開日: 2009/06/30
ジャーナル フリーCoated carbide tool is now located in an important position in turning operation. Some tool fracture troubles, however, sometimes occur especially in rough or interrupted cutting, so more reliability to coated carbide tool is required. Many papers on wear of coated carbide tool are published, however, study on toughness of coated carbide tool is little. This study is intended to gain ideas concerning about coated layer and carbide substrate in order to develop tougher coated carbide tools. Conclusions are as follows : (1) WC-Coalloy (K grade carbide) with 20-30 μm thickness on WC-TiC-Co alloy (P grade carbide) substrate is very effective for improving toughness of coated carbide. (2) Wear resistance of hard materials used as coated layer, such as TiC, TiCN and Al203 much depends upon cutting speed. Wear resistance of TiC or TiCN is better than that of Al2O3 in lower cutting speed than 300 m/min. Al2O3 has excellent wear resistance in higher cutting speed than 300 m/min. (3) Thermal crack resistance of coated layers is affected by thermal diffusivity of them. TiCN with higher thermal diffusibility has better thermal crack resistance.抄録全体を表示PDF形式でダウンロード (1107K) -
吉川 昌範, 橋本 毅, 西本 廉1981 年 47 巻 10 号 p. 1234-1239
発行日: 1981年
公開日: 2009/06/30
ジャーナル フリーThere are two methods to relieve the residual stress, one is the method by heat treatment and the other is the method by mechanical treatment. Mechanical treatment relieves the residual stress without lowering the mechanical properties of the material. By way of mechanical action, impact stress is used in this experiment. The investigated problem is whether impact stress reduces the residual stress or not. Impact stress less than yield stress is given on the round bar test piece which has the local residual stress in the surface. The test piece has the compressive or the tensile residual stress in the surface. By giving compressive or tensile impact stress on these test pieces, the residual stress has been reduced, and the amount of the residual stress reduction has increased with increasing the number of impact. Both on the test piece which has the compressive residual stress in the surface and on the test piece which has the tensile residual stress, the residual stress has been reduced by giving tensile impact stress more than by giving compressive impact stress.抄録全体を表示PDF形式でダウンロード (1043K) -
アルミニウム粉混入無気孔砥石の特性中島 利勝, 宇野 義幸, 森谷 守1981 年 47 巻 10 号 p. 1240-1245
発行日: 1981年
公開日: 2009/06/30
ジャーナル フリーResinoid grinding wheel, which has various advantages, has widely been adopted in rough grinding, but it may not have suitable properties for precision grinding. The purpose of this study is to obtain fundamental data for developing the high performance resinoid wheel which is available to rough grinding and/or precision grinding, improving heat resistance and elasticity of the conventional wheel. In this paper, a new poreless resinoid wheel which contains aluminium powder in bond material is introduced and its grinding performance is discussed. First it is pointed out that the wheel has better thermal conductivity and Young's modulus as compared with the conventional one. It is also shown that cutting grains on the periphery of the wheel can be stuck out effectively by dressing with PVA wheel. Furthermore it is shown that the aluminium powdered poreless resinoid wheel, dressed with PVA wheel, can be adopted even in precision grinding.抄録全体を表示PDF形式でダウンロード (1625K) -
摩擦・摩耗への効果水野 萬亀雄1981 年 47 巻 10 号 p. 1246-1251
発行日: 1981年
公開日: 2009/06/30
ジャーナル フリーIn this paper, the adsorption of fatty acid and its lubricating effect on friction and wear are described. The experiments of the adsorption are carried out by the radioactive tracer technique. In the first experiment of adsorption, a metal pecimen of penny shape is immersed in a solution of n-hexadecane to which a small percentage of carbon fourteen labeled palmitic acid is added, next wiped with a filter paper, then measured by G. M. counter. The amount adsorbed on the metal surface increases little with time of immersion in the solution, although large in the first dipping. Rather, its value is increased predominantly by reciprocal operations of “dipping and wiping”, not necessarily depending on the time of immersion. In the second experiment of adsorption, a foil is floated on the solution, the radioactivity on the back surface of the foil is measured continuously by G. M. tube set over the foil. As a result, the amount of adsorption is increased slowly with time, in the manner similar to an exponential curve which levels off after a long time, for example, two hundred hours. The phenomena of adsorption is also observed from friction and wear experi-ments. The effect on reduction in friction and wear is less at single rubbing, but is remarkable at repeated rubbing. As the results of these experiments, it has been made clear that fatty acid is adsorbed richly on metal surface by operations of “dipping and wiping” or repeated rubbing, regardless of small amount of the additive fatty acid in lubricant.抄録全体を表示PDF形式でダウンロード (1209K) -
隈部 淳一郎, 斎藤 輝雄, 田中 幹男1981 年 47 巻 10 号 p. 1252-1257
発行日: 1981年
公開日: 2009/06/30
ジャーナル フリーThe purpose of this investigation is a invention of theory and technics on roundness, ≈0 machining; turning for a precise circle. The concrete technics is the super precision ultrasonic vibration turning with a both end dead center support system. This is analyzed according to the principle of making a precise circle. A work is supported by both end dead centers and center holes which are machined precisely and revolved at slow speed. Under this condition, the work is machined as acting a continuously and systematically pulsating cutting force by the ultrasonic vibration cutting mechanism.Key points of this technics are as follows. The one is a contrivance for making to be accurately a vibration mode of cutting point, the other is a contrivance for machining high precise center holes. For the former, some contrivances and betterments on the ultrasonic vibration cutting device are done, so that the vibration mode of cutting point is able to be accurate, and, for the latter, the precise vibration lapping device using an electric stepping motor is created, so that high precise center holes can be machined. After all, to actualize machining roundness≈0 work; brass, stainless steel and carbon steel are succeeded.抄録全体を表示PDF形式でダウンロード (1312K) -
摩擦特性を利用した切削抵抗の計算山崎 直樹, 福岡 俊道1981 年 47 巻 10 号 p. 1258-1263
発行日: 1981年
公開日: 2009/06/30
ジャーナル フリーThis paper presents the calculating method predicting the cutting resistance values under ordinary cutting conditions. For this purpose, characteristics of three factors, that is, coefficients of friction at tool-chip interface, cutting forces, forces along the shear plane are used. From the consideration of the friction test results, coefficients of friction can be expressed by the product of the force normal to the rake face and the chip speed depending upon several rake angle values. By applying the proposal given by Tobias for the orthogonal cutting to the three-dimensional case, cutting forces and forces a-long the shear plane are assumed to be propor-tional to the shear plane area. The calculated values by this method fairly coincide with experimental values under various cutting conditions for the some carbon steel materials.抄録全体を表示PDF形式でダウンロード (922K) -
堤 正臣, 伊東 誼, 益子 正巳, 市川 浩一郎1981 年 47 巻 10 号 p. 1264-1269
発行日: 1981年
公開日: 2009/06/30
ジャーナル フリーThis paper describes the in-process measurement of the thickness of silicon wafers in the lapping process. As a first step, the influence of the measuring method, the coupling liquid and the resonant frequency of the ultrasonic oscillator on the repetitional measuring results were examined. From the results, it was found that the indirect contact method using the coupling liquid of slurry gives higher accuracy than the immersion method using the slurry flow, and the higher resonant frequency of the oscillator gives the higher acurracy. And next, referring above fundamental experiments, the inprocess measuring equipment was developed and its performance tests were carried out. In the equipment, the indirect contact method using a delay-line of polystyrene was used. The equipment developed here can fully be used as an automatic sizing equipment in the lapping process of sliced silicon wafers.抄録全体を表示PDF形式でダウンロード (1118K) -
接触面の空隙部に介在物がある場合の接触熱抵抗柳 和久, 塚田 忠夫1981 年 47 巻 10 号 p. 1270-1275
発行日: 1981年
公開日: 2009/06/30
ジャーナル フリーThis paper deals with the comparison between the calculated values of thermal contact resistance and experimental results when interstitial material such as air or oil exists in the clearance of interface. The overall behaviour of thermal contact resistance is discussed by the calculated results which give a good fit to the experimental data. The conclusions obtained are as follows : (1) The calculation of thermal contact resistance involves the property that the effective thermal conductivity of air or oil at the interface decreases as the mean. distance of the clearance becomes small. (2) Thermal contact resistance decreases with an increase in thermal conductivity of interstitial material and undertakes smaller variation to the applied load than in vacuum environment. (3) Thermal contact resistance shows a linear increase to surface roughness on a double logarithmic chart. Although the harder contacting members enlarge the thermal contact resistance, its variation in the range of light applied load becomes considerably small with increasing thermal conductivity of interstitial ma-terial.抄録全体を表示PDF形式でダウンロード (1202K) -
測定装置の試作と測定実験下河辺 明, 豊山 晃, 河本 知和1981 年 47 巻 10 号 p. 1276-1282
発行日: 1981年
公開日: 2009/06/30
ジャーナル フリーAn experimental system, which is intended for checking accurately the profile of worm hob teeth, is introduced. Although the system has a simple mechanism, it can be used for measuring workpieces of various hob forms. The construction of the system and the procedure of operating the system are explained. The computer programs for data acquisition and processing are also explained. The accuracy calibration of the linear and angular positioning, and the electronic micrometer are carried out. A test hob, a flyhob and a worm hob are measured to prove the system. These workpieces are also measured by using a measuring microscope and an existing hob tester. The measured result by one of these methods agrees with those by the other two.抄録全体を表示PDF形式でダウンロード (1258K) -
竹山 秀彦1981 年 47 巻 10 号 p. 1284-1287
発行日: 1981年
公開日: 2009/06/30
ジャーナル フリーPDF形式でダウンロード (1073K) -
青木 保雄1981 年 47 巻 10 号 p. 1288-1292
発行日: 1981年
公開日: 2009/06/30
ジャーナル フリーPDF形式でダウンロード (816K) -
下間 頼一1981 年 47 巻 10 号 p. 1293
発行日: 1981年
公開日: 2009/06/30
ジャーナル フリーPDF形式でダウンロード (188K)
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