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46 巻, 7 号
選択された号の論文の18件中1～18を表示しています
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松原 十三生, 水本 洋1980 年 46 巻 7 号 p. 799-804
発行日: 1980/07/05
公開日: 2009/06/30
ジャーナル フリーIn this paper, the effect of the lubricating action of PTFE on the wear mechanism of the bronze filled PTFE composite, which is applicable to the machine tool slideway, is studied. The results of the analyses are as follows: (1) From the wear tests of the bronze which is lubricated by PTFE, it is proved that the wear rate of the bronze can be decreased by increasing the supply of PTFE and/or by reducing the load to the bronze. (2) By the use of the result (1), the wear rate of the bronze filled PTFE composite is derived theoretically, and this theoretical analysis shows good agreement with the experimental result. (3) Heavy adhesion of PTFE film to the surface of the composite is almost always observed with a microscope. This observation and the results of the wear tests indicate that the PTFE film prevents the direct contacts between the fillers and the counter face, and such lubricating action of PTFE decreases the wear rate of the fillers.抄録全体を表示PDF形式でダウンロード (1331K) -
佐田 登志夫, 塩田 泰仁1980 年 46 巻 7 号 p. 805-811
発行日: 1980/07/05
公開日: 2009/06/30
ジャーナル フリーThe importance of the adaptive control has been recognized for the efficient and safe use of machine tools. A new principle of the adaptive control optimization on the turning process is proposed in this research. The total cost of the cutting is set up as the performance index. Based on the cost analysis and the cutting data hitherto obtained, a locus of the optimum cutting condition between the feed and the cutting velocity is first prespecified. The cutting is performed on the prespecified locus, moreover to get the highest feed rate under three constraints (power, vibration and cutting force). The life of cutting tool is measured in process. Using the results a mini-computer performs the optimization of the locus itself in order to realize the cutting at the minimum cost. By adding this adaptive control system to a conventional NC a saving of 20% on the total cost of cutting is led.抄録全体を表示PDF形式でダウンロード (1280K) -
しまりばめと円筒度近藤 孝之1980 年 46 巻 7 号 p. 812-817
発行日: 1980/07/05
公開日: 2009/06/30
ジャーナル フリーContact pressure and displacements in a shaft and ring as a pair on interference fit having cylindricity error of axially symmetrical profiles are analyzed by means of finite element method (FEM) with some assumptions: the deformation of bulk material is elastic, roughness of fitting surface is negligible, and the frictional condition on the contact surface obeys Coulomb's law. The analytical results are as follows: (1) Mean contact pressure is almost constant when mean interference is equal and the profile errors are small comparing with it, although displacements and local contact pressure vary according to the change of profile errors. (2) When the contact between shaft and ring comes to break locally as the profile errors increase mean contact pressure can not be estimated by mean interference any more. It is necessary to modify the mean interference by the way of cutting the interference off where the shaft and ring separate. (3) There is no remarkable change of contact pressure and displacements by the change of the coefficient of friction, however there is a little change of them at the ends of fitting surface.抄録全体を表示PDF形式でダウンロード (982K) -
鋳鉄ホーニング加工の高速化上田 隆司, 山本 明1980 年 46 巻 7 号 p. 818-823
発行日: 1980/07/05
公開日: 2009/06/30
ジャーナル フリーIncrease of cutting speed will be one of the most easily applicable means to perform a high productive honing. In this report, the effects of increased speed in the honing of cast iron are made clear, and the devices to improve weak points in performance resulting from this condition are discussed. Experiment was carried out by a simple method which finished a bar surface with a single stick. The cutting speed was raised up to two or three times faster than usual speed by increase of rotary speed of workpiece. This trial brings high productive performance, that is, increase of metal removal rate and reduction of specific stick wear and operation time. However, it involves also aggravation of surface roughness and out of roundness, and runs counter to the expectation of improving finishing accuracy. Those changes in performance are concluded to be mainly caused by the crushing of cutting edges which is developed by the vibration, that occurs by shuttle motion of stick at the stroke end. Therefore, the crushing of cutting edges should be restrained in order to improve the finishing accuracy in high speed honing. So, for that purpose, the following some devices were discussed and their effectiveness were confirmed by experiment; reducing a cross-hatch angle, using a hard stick or a sulfur treated one which reinforces acting grits, and so on.抄録全体を表示PDF形式でダウンロード (1083K) -
砥石減耗曲線の進展の様子谷 泰弘, 岩淵 修, 長尾 高明, 竹中 規雄1980 年 46 巻 7 号 p. 824-829
発行日: 1980/07/05
公開日: 2009/06/30
ジャーナル フリーA statistical method is applied to the analysis of face grinding mechanism. The grain dropping ratio is defined and a simulation of the wear process of grinding wheel is made in calculation by a computer. The relation between the grinding condition and the progress of worn surface is analyzed. The results are as follows : (1) The curve of worn surface becomes the shape of "S" whose middle part is nearly straight. (2) A certain relation between the progressive speed, the slope of the tangent to the curve and the distribution of the dropping ratio is found independently of the grinding conditions. (3) When the progressive speed is very small, it changes stepwise. (4) The strong correlation between the grinding conditions and the progressive speed is observed. As parameters such as the critical depth of cut, the grain size number, the half of apex angle of grain, the rotating speed of the wheel, the depth of cut and the grain volume ratio of the wheel become large, the progressive speed becomes small. And as the feeding speed is reduced, the progressive speed decreases.抄録全体を表示PDF形式でダウンロード (1073K) -
新井 典久, 松森 昇, 恩地 好晶, 畑中 一孝1980 年 46 巻 7 号 p. 830-835
発行日: 1980/07/05
公開日: 2009/06/30
ジャーナル フリーIn recent superfinishing, to get economically higher stock removal and good surface quality, the sulphur treated stones of fine grain and soft grade are widely used. So, in this paper, the effects of grade, grit size and sulphur treatment on the finishing ability (cutting resistance, stock removal and so on) of superfinishing were examined. The following conclusions were obtained. (1) In case that no sulphur treated, soft grade and fine grain stones are used, the experimental results of cutting resistance and stock removal agree well with theoretical calculated results by formulas in the past. (2) It is found that some of pressure applied on contacting surface with work of sulphur treated stone are supported by sulphur. (3) By considering the effects of sulphur, the formulas of the cutting resistance and stock removal for sulphur treated stone could be introduced from the experimental results.抄録全体を表示PDF形式でダウンロード (1159K) -
鴨下 隆志, 矢野 宏1980 年 46 巻 7 号 p. 836-841
発行日: 1980/07/05
公開日: 2009/06/30
ジャーナル フリーFor plastic parts, a good fitting is required in many instances in view of the purposes of their uses. Thus, where such requirement is dependent on the judgment made by human senses, a number of characteristic values must be measured in order to obtain the mechanical characteristic values matching with the quantity of the sense. In this context, the application of the multivariate data analysis method to the analysis of the data of the multi-characteristic value concerning the man-machine system is considered. The degree of fitting judged by one's sense is quantified by the multidimensional scaling, using the capsule-shaped plastic parts. Also, the dimensions, shapes and the degree of mechanical fitting as the mechanical characteristic values are measured and the relationships of these values with the quantified senses are determined by the factor analysis, then it is clarified that the multivariate data analysis is effective for this purpose. The main points of the conclusion are as follows: (1) The degree of fitting can be classified into the two independent factors, that is, the potency factor and the activity factor depending on the individuals' senses. (2) 1st factor corresponds to the average gap between the inside and outside of the parts to be fitting with each other, while 2nd factor corresponds to the difference between the inside dimensions and the outside dimensions of the parts to be fitted with each other.抄録全体を表示PDF形式でダウンロード (1341K) -
銀板表面にガラス質釉薬またはけいそう土を被覆した場合の実験淵澤 定克, 奈良崎 道治, 下山 勇二郎, 武田 信男1980 年 46 巻 7 号 p. 842-848
発行日: 1980/07/05
公開日: 2009/06/30
ジャーナル フリーCooling rate of the material under mist cooling will change when it is coated with the other material having different thermal properties. If thermal conductivity of coating material is so much smaller than that of substrate material, the evaporation behavior of mist droplets may change, and so the cooling time of the substrate material may be shortened. This paper deals with the experimental study on the effect of coating on cooling rate of silver disc coated with glazy material or diatomaceous earth. It becomes clear that the cooling time is distinctly shortened by coating with these materials having very small thermal conductivity, because of the change of evaporation behavior of mist droplets and the increase of heat flux at high temperature range.抄録全体を表示PDF形式でダウンロード (1539K) -
粒子まわりの塑性変形と空洞合体のモデル解析臼井 英治, 帯川 利之, 白樫 高洋1980 年 46 巻 7 号 p. 849-855
発行日: 1980/07/05
公開日: 2009/06/30
ジャーナル フリーIn order to investigate the plastic flow and the void formation round the additive particles, a specially designed shear test of α-brass which contains steel pins as the particles is conducted under plane strain conditions with hydrostatic pressure. The void is found to be plastically formed as a results of the flow produced by the particle which acts just like a cutting edge, but not formed as a propagating crack. It is also found that there exist three different types of the void coalescence depending upon relative location of the two particles, nevertheless the coalescence is always achieved by the plastic instability of shear in the region between the two voids. An approximate method for calculating the stress relaxation induced by a single or coalesced void using the finite element method is proposed, and several calculation results are discussed.抄録全体を表示PDF形式でダウンロード (1955K) -
工具の挙動と加工穴の多角形形状佐久間 敬三, 清田 宏1980 年 46 巻 7 号 p. 856-861
発行日: 1980/07/05
公開日: 2009/06/30
ジャーナル フリーThis paper describes the mechanism of forming of multicorner-profiled hole in reaming steel with multi-edge cutting tool. The mechanism is experimentally studied by measuring the displacement of tool axis in two directions (X, Y), and the state of plastic flow layer in sub-surface of machined hole. The results obtained are as follows: (1) Multicornered profile observed in reamed hole are formed by vibratory movements of tool axis, which is caused by tool oscillation in radial directions resulting from the deviation of the pilot hole axis, and the unequal width of tool margin. The frequency having strong power-spectra in vibration of tool is significantly correlated to the number of even-spaced teeth of tool. (2) A six-teethed reamer usually produces seven or five cornered shape. Seven cornered shape of hole is produced by tool axis movement in the opposite direction to that of spindle rotation, while five cornered shape is produced in the same direction for it. (3) Profile of the reamed hole can be predicted by use of the Lissajous's figure of displacement in radial directions (X, Y). (4) In holemachining process, multicornered profile formation is unavoidable, when using the multi-teethed tool.抄録全体を表示PDF形式でダウンロード (3327K) -
小池 昌泰, 松田 次郎, 中山 隆義, 増沢 芳紀, 中条 知和, 矢野 宏1980 年 46 巻 7 号 p. 862-868
発行日: 1980/07/05
公開日: 2009/06/30
ジャーナル フリーThe effectiveness of the two-flank roll test in the case of the evaluation of plastic gears is studied. Test gears are made by injection-molding using one mold with six cavities under various moldtemperatures. In addition to the roll test, measurement on individual errors are performed on the test gears. Roll test parameters, such as Fourier amplitudes and error variances, are obtained by Fourier analysis and analysis of variance on roll test data. Form error parameters are obtained from the individual error data, such as pitch errors, runout, tooth profile error and pressure angle error. In order to get the means of the roll test parameters, factor analysis is applied for the study on the relations of these parameters. The following results are clarified. (1) The total form characteristics and the tooth profile characteristics are obtained by two-flank roll test. (2) Total form characteristics are composed of three parts; eccentricity, deformation in addendum circle and variation in diameter of pitch circle. (3) Two-flank roll test is effective on evaluation of above characteristics of plastic gears.抄録全体を表示PDF形式でダウンロード (1423K) -
粉末粒子の静電加速による特殊加工法の研究(第3報)井出 敞, 森 勇蔵, 紺田 功, 井川 直哉1980 年 46 巻 7 号 p. 869-874
発行日: 1980/07/05
公開日: 2009/06/30
ジャーナル フリーIn order to realize a new unconventional machining method by making high-velocity powder particles collide with the surface of material, the properties of the particle velocities and these distribution are investigated on various powder particles electrostatically accelerated from the developed powder particle beam gun. As a result, it can be shown that the relation between the velocity and the influence factors measured by time-of-flight technique may obey the fundamental theory on electrostatic acceleration. That is, the velocity of each particle whose kinetic energy seems to be corresponding to the accelerating voltage multiplied by the amount of charge is inversely proportional to the square root of each of the size and the density of the particle in a fixed accelerating condition. Furthermore, both of the average value and the distributed range of the velocities in a given sample of powder particles can be quantitatively related with the charging conditions such as the configuration, the spacing and the applied voltage of charging electrode in the present gun.抄録全体を表示PDF形式でダウンロード (1142K) -
岩田 一明, 森脇 俊道, 橋本 英文, 柴坂 敏郎1980 年 46 巻 7 号 p. 875-880
発行日: 1980/07/05
公開日: 2009/06/30
ジャーナル フリーThe acoustic emission signal from the cutting process is monitored in order to investigate feasibility of in-process sensing of tool deterioration during metal cutting. Interrupted cutting of alloy steel SCM 3 was carried out with carbide tools P 20 on an NC lathe, and acoustic emission signals with large amplitudes were detected when chipping, crack and fracture of the cutting tools were observed. The feed motion of the lathe was automatically stopped when the damages of the tools were detected. The amplitude of detected acoustic emission signal was related to the damages of the tools regardless to the cutting conditions under investigations. The acoustic emission signal detected during cutting with ceramic tools was also related to damages of the tool, however the scatter of data was larger in this case. The acoustic emission signal detected during static fracture of the tool due to indentation of a diamond indenter was correlated to brittleness and toughness of the tool, but the levels of the signals were far below than those obtained during cutting.抄録全体を表示PDF形式でダウンロード (1265K) -
田中 三義, 伊藤 普, 田口 幸二1980 年 46 巻 7 号 p. 881-886
発行日: 1980/07/05
公開日: 2009/06/30
ジャーナル フリーThe work described in the present paper is concerned with the gas nitriding treated TiC-base cermet cutting tool. Gas nitriding treatment is achieved by use of pure N2 as a nitriding agent and a formation of a TiN phase is achieved by a reaction of TiC and N2. The cutting properties of the nitriding treated TiC-base cermet cutting tool are tested. The results of the experiments can be summarized as follows. (1) Observation of diffusion layer of N2 by X-ray micro-analyzing shows that the diffusion depth of nitrogen is about 3 μm. (2) Nitrid phase is diffusion phase of nitrogen, so nitriding layer is not peeled off differently from TiC coating by CVD (chemical vapour deposition) process. Wear, chipping and thermal crack resistance of nitriding treated TiC-base cermet tool are excellent compared with TiC coated cutting tool. (3) As to cutting of carbon steel S 45 C, the best nitriding temperature is 1 100°C, and the effect of nitriding is larger in lower cutting speed 100 m/min. Thermal crack resistance and wear resistance in interrupted cutting by turning and milling are improved by nitriding treatment.抄録全体を表示PDF形式でダウンロード (6100K) -
小林 正人, 岡崎 哲夫, 五十嵐 賢, 久保 衆伍1980 年 46 巻 7 号 p. 887-892
発行日: 1980/07/05
公開日: 2009/06/30
ジャーナル フリーThis paper describes the results of an investigation on the printing mechanism design conditions for the line printer high speed performance. The results obtained are as follows: (1) The lowest permitted print density limits, estimated from the print quality viewpoint, are about 1.0 and about 0.6 in original and five-ply copy, respectively. The optimum stroke width value is 0.3-0.4 mm. (2) To obtain the lowest permitted print density limits, the peak printing force value above 10kg is required, or the hammer kinetic energy above 7 mJ is required. (3) To prevent the print quality deterioration occurring in high speed printing, it is necessary to reduce hammer contact time and, consequently, to reduce hammer mass. Based on the above results, the titanium alloys, which are advantageous in respect to density and strength, were adopted as the hammer material. A light weight 0.22 g mass and 16 μs contact time hammer was realized. As a result, a high speed line printer with 1500 lines per minute for 128 characters has been developed.抄録全体を表示PDF形式でダウンロード (1121K) -
古沢 昭, 佐藤 純一, 福井 紘一郎1980 年 46 巻 7 号 p. 893-897
発行日: 1980/07/05
公開日: 2009/06/30
ジャーナル フリーPDF形式でダウンロード (1162K) -
切削加工専門委員会 , 被削性小委員会1980 年 46 巻 7 号 p. 898-906
発行日: 1980/07/05
公開日: 2009/06/30
ジャーナル フリーPDF形式でダウンロード (2225K) -
書上 誠之助1980 年 46 巻 7 号 p. 907
発行日: 1980/07/05
公開日: 2009/06/30
ジャーナル フリーPDF形式でダウンロード (231K)
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