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39 巻, 465 号
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斎藤 長男1973 年 39 巻 465 号 p. 983-989
発行日: 1973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 (11216K) -
加工変形領域の結晶学的観察小林 雅晴, 田頭 孝介, 中江 仁, 星 光一1973 年 39 巻 465 号 p. 990-995
発行日: 1973年
公開日: 2009/06/30
ジャーナル フリーThis paper describes some experiments with the deformed regions produced in Fe-3.14%Si alloy single crystals by orthogonal cutting, in which dislocation etch pit pattern method was employed. It also deals with the changes of both micro-Vickers hardness and crystal orientation. Two pass cuttings were carried out from the point of practical interest. The following results were obtained by the observation:
(1) The visual survey on the deformed regions were brought by etch pit method.
(2) In deformed layers, it was observed that the crystal orientations were tend to align to some specific directions. Cutting such oriented crystals, the deformed layers were narrower.
(3) From the observation of slip systems acted in cutting process, the deformation mechanisms were seemed to be influenced by rake angle.
(4) The regions in which the dislocation etch pit pattern were observed became narrower in second cutting than first cutting, but the work hardened values were similar in both cases.抄録全体を表示PDF形式でダウンロード (7962K) -
変形能Λに基づく接触機構の解析瀬戸口 良三1973 年 39 巻 465 号 p. 996-1001
発行日: 1973年
公開日: 2010/02/16
ジャーナル フリーIn this paper, the stochastic structure determining the quantities of contact phenomena reported at the 2nd and 3rd reports is evaluated and the deformable coefficient defined at this analysis method is applied on the quantitative analysis of the mechanism of contact phenomena of solids as one of the basic research of the friction and wear. In this case of the quantitative analysis, owing to the difficulty of the direct measure of the approach between two contact surfaces, the number of contact spots is estimated at first with measuring the electric resistance of contact areas, and then the approach of the contact (za) is determined with the equation on the number of contact spots defined at the 2nd report. Subsequently the deformable coefficient (Λ) is determined according to the relationship between the approach and the deformable coefficient. And so the following results are gained:
(1) The rightness of the stochastic structure determining the quantities of contact phenomena is proved.
(2) It is demonstrated quantitatively that the mechanism of the contact of the copper finished by lapping as the example of the contact pairs equivalent with the mechanical strength of the bulk each other is deformable.
(3) The proper meaning of the approach is made clear.抄録全体を表示PDF形式でダウンロード (5589K) -
Al合金,Cu合金,炭素鋼材について隈部 淳一郎, 福田 俊穂1973 年 39 巻 465 号 p. 1002-1008
発行日: 1973年
公開日: 2009/06/30
ジャーナル フリーThe purpose of this study is to obtain better surface roughness, roundness and cylindricity in long hole boring duralumin, copper, brass and carbon steel. The experiments are carried out by the effect of improvement of the boring bar's rigidity that has been clarified in the previous report. For this long hole boring, a new special ultrasonical torsional vibration boring device can be created. This device fixed on the carriage of the lathe enable to bore a hole of 110 mm in diameter and 300 mm in length. The cutting conditions are as follows: cutting tool material and profile; diamond, 0°, 8°, 8°, 45°, 45°, approximately 1 mm, the vibration tool; in the same direction as that of boring, frequency; 21.7 kHz constant, amplitude; 15 μm constant, cutting speed; 29.5 m/min constant, depth of cut; 0.0050.2 mm, feed; 0. 050.2 mm/rev. The main results are as follows: 1) Machined surface roughness coincides with the theoretical one in these materials. 2) Under 0.1 mm in depth of cut, 0.05 mm/rev in feed, 29. 5 m/min in cutting speed, surface roughness of 0.7 μm is obtained in carbon steel. This more smoothed surface of 0.7 μmRmax has made a new record in boring carbon steel with the diamond tool. 3) Clear checkered pattern that is reflected on the machined surface can be observed. 4) Roundness of 2 μm and cylindricity of 3 pm per the bore length of 300 mm are obtained. 5) By this study, it is proved that a hole of long length can be bored precisely by this vibration boring with diamond tool.抄録全体を表示PDF形式でダウンロード (5958K) -
林 巌, 林 輝1973 年 39 巻 465 号 p. 1009-1015
発行日: 1973年
公開日: 2009/06/30
ジャーナル フリーThis report describes the above method and some experiments. This method has the following characteristics: the transmission error can be calculated with an electrical circuit using torques of both sides of a flywheel, a moment of inertia of the flywheel and a torsional stiffness of a gear axis, moreover a spectrum of the transmission error can be recorded on a paper with an additional electrical circuit containing a narrow band pass filter.
The following results are obtained:
(1) The spectrum of the transmission error was recorded on some position calculated theoretically, using a simple electrical calculating circuit.
(2) About a component due to a run out, a measured value according to this method coincides with a value calculated from a static transmission error.
(3) A micron-order transmission error of a component of one interval a teeth and higher intervals can be recorded with high accuracy.抄録全体を表示PDF形式でダウンロード (5183K) -
スペクトル法による切削動特性の同定森脇 俊道1973 年 39 巻 465 号 p. 1016-1022
発行日: 1973年
公開日: 2009/06/30
ジャーナル フリーA new experimental method is proposed to measure the dynamic characteristics of cutting process applying the technique of time series analysis. The specific characteristics of this method as weighed against conventional methods are measurements of the cutting dynamics for a wider range of frequencies under more realistic cutting conditions with greatly reduced time and instrumentations. Some cutting experiments are carried out under quasi-orthogonal cutting conditions using a cantilever-type structural model employing a small random excitation. In this report, auto- and cross-correlation functions, spectral density functions and frequency response functions are calculated from the measured cutting data for wave cutting without regenerative effects, and the accuracy of estimation is also discussed. The experimental results show that the frequency responses of main cutting force in stiffness are not much influenced by the frequency of vibration within 0-500 Hz, and slight phase leads are observed. On the other hand the frequency responses of the thrust force increase in gain with the frequency of vibration and the phase leads become larger especially at low cutting speeds.抄録全体を表示PDF形式でダウンロード (1205K) -
工具すくい面の切削応力分布と工具刃先の静剛性岸浪 建史, 横内 弘宇, 星 光一, 斉藤 勝政1973 年 39 巻 465 号 p. 1023-1029
発行日: 1973年
公開日: 2009/06/30
ジャーナル フリーThe finite element method is applied to the analyses of the distribution of normal stresses on the tool rake face, stress-strain distribution in the tool and the static deformation of cutting edge. The following results are obtained:
(1) The acting force on the distance of 10 percent of chip contact length near the cutting point is about 25 percent of total cutting force.
(2) The cutting edge is deformed in both directions of the cutting and the depth of cut in cutting process, and the displacement of cutting point is nearly proportional to the value of clearance angle.
(3) Maximum principal shearing stress is produced in the rake face except the cutting edge for a cutting tool which has less clearance angle.抄録全体を表示PDF形式でダウンロード (1160K) -
振動目直しに関する研究(第1報)安井 平司, 中園 汎, 津和 秀夫1973 年 39 巻 465 号 p. 1030-1035
発行日: 1973年
公開日: 2009/06/30
ジャーナル フリーThe ultrasonic vibration dressing method is devised in order to improve the grinding performance by adjusting the effective cutting edge spacings and the sharpness of cutting edges on the working surface of the grinding wheel. To adjust those with the new dressing method is carried out by vibrating a single diamond dresser and cutting a sine groove in a circumferential direction on the working surface.
The effect of the vibration dressing method on the practical improvement of the grinding performance is examined by the measurement of the effective cutting edge spacings and the comparison of the life time of grinding wheel dressed with the several conditions.
It is clarified that the grinding wheel is dressed effectively by using the new dressing device. Namely, the effective cutting edge spacings are ascertained to be adjusted until several times as compared to those dressed by a single point diamond dresser. It is cleared that the grinding performance of the grinding wheel dressed by the new dressing device is improved about seven times in some cases.抄録全体を表示PDF形式でダウンロード (3185K) -
田中 重芳, 大久保 嘉, 久保 達郎1973 年 39 巻 465 号 p. 1036-1041
発行日: 1973年
公開日: 2009/06/30
ジャーナル フリーWhen a completely polished surface plate is placed face down on the completely leveled plane and a slight force is applied at a corner point of it in a direction parallel to the side continuous thereto, the theoretical pivoting center of the surface plate is unique to a given shape thereof. The present method proposes to judge the flatness of a surface plate by a deviation between its theoretical pivoting center and an actual measurement. The theoretical pivoting center was calculated for surface plates of various shapes for this study. In the experiment an appropriate amount of grease was sandwiched between a surface plate and the level plate to create as completely flat planes as possible. In this condition the pivoting centers of surface plates nearly coincided with the calculated points. In the case of semi-polished surface plates, approximate wavy shapes of surface could be predicted from measurements of their pivoting points.抄録全体を表示PDF形式でダウンロード (2172K) -
高野 政晴1973 年 39 巻 465 号 p. 1042-1048
発行日: 1973年
公開日: 2009/06/30
ジャーナル フリーThe function of the gear mechanism is to transmit exactly the rotation angle. This function error, that is, single-flank mesh error is discussed from statistical view point, and the following results are obtained in relation to the inherent gear errors (pitch error and tooth profile error).
(1) If the inherent gear errors are normally distributed, the mesh error is also normally distributed in approximation in any contact ratio.
(2) If one factor causing the errors is dominant, it is no more normal distribution, and the effect of this factor appears characteristically in mesh error spectrum.
(3) The variance of mesh error is proportional to that of inherent gear errors, experimental results show, however, that the actual value is about (2/3-3/2)2 times of calculated one.
(4) In order to obtain the reliable function error, it is necessary to do the single-flank mesh test, as the usual measurement of inherent gear errors gives insufficient numbers of data to treat those statistically.抄録全体を表示PDF形式でダウンロード (1204K) -
鉄鋼材料の研削性に及ぼす被削材温度の影響(第2報)松尾 哲夫, 黒木 紳一郎, 清沢 研作, 長野 豊1973 年 39 巻 465 号 p. 1049-1054
発行日: 1973年
公開日: 2009/06/30
ジャーナル フリーThere are few reports about the wear of grinding wheel when grinding hot steels. In the present study the constant pressure plunge grinding tests have been performed with carbon steels, SUS 24 and SUS 27 stainless steels at the workpiece temperature range of room temperature to 600°C under the loads of 1.0, 2.0, and 3.0 kg/cm2. With increasing the workpiece temperature the wear of wheel increased on grinding SUS 24 stainless steel, but a completely different result were seen on grinding SUS 27 steel, while the wheel wear was shown to take a maximum value in the temperature range of 150 to 450°C. According to microscopic observations, a distinct difference was found in the workpiece temperature dependence of the wear mechanism of wheel.抄録全体を表示PDF形式でダウンロード (3247K) -
切削工具のチッピングに関する基礎研究(第1報)田中 義信, 井川 直哉, 安木 國晴1973 年 39 巻 465 号 p. 1055-1061
発行日: 1973年
公開日: 2009/06/30
ジャーナル フリーBased on the stress analysis of a wedge, the stress state in the cutting tool, especially in the region close to the edge, is analyzed theoretically under the distributed load both on the rake and flank faces. In a sharp tool, as an example, it is shown that the small region just close to the wedge apex and the slender region close to the flank face are subjected to the high compressive principal stress and that the thin region adjacent to the rake face is subjected to the high tensile principal stress. The quantitative results are also presented for the effect of the rake angle and the depth of cut on the stress distribution.抄録全体を表示PDF形式でダウンロード (1164K) -
小尾 誠, 辰巳 洋二, 佐田 登志夫1973 年 39 巻 465 号 p. 1062-1067
発行日: 1973年
公開日: 2009/06/30
ジャーナル フリーThis paper presents the in-process measuring method of metal loading on the wheel surface in grinding by use of an eddy current sensor and some experimental results.
The principle of the measurement is based on the inductive effect between the coil which is placed close to the wheel surface and metal particles loaded on the wheel surface. It is found that the sensor is so sensitive as to detect the fine metal particles as large as 0.1 mm in diameter loaded on the wheel surface. So, it is able to observe the process of formation, growth and fall out of the loading, and to estimate the total loading coverage on the wheel surface.
The experiments by use of the sensor show that the loading increases rapidly first and approaches to a certain value with increase of the metal removal by grinding. The loading depends on the work material and grinding conditions. For example, the stainless steel is apt to load more than the carbon steel, and the most is aluminium of these three work materials. The larger the infeed speed in grinding, the more loading. Increase of suppyling rate of grinding fluid decreases the loading on the wheel surface.抄録全体を表示PDF形式でダウンロード (3349K) -
研削仕上面に関する研究(第4報)喜田 義宏, 井戸 守1973 年 39 巻 465 号 p. 1068-1073
発行日: 1973年
公開日: 2009/06/30
ジャーナル フリーIn the grinding process, the swell out residual is produced at both sides of groove and there exists the interference phenomenon in forming swell out residual caused by following cutting edges. These phenomena have large influence on the formed surface roughness and have the relation to stock removal. So, for the purpose of analysing the grinding mechanism, such swell out phenomenon must be taken into consideration. But it is impossible to measure the volume and the height of swell out residual in the grinding process because of its complexity.
This paper concerns with swell out residual in the grinding process by means of Monte-Carlo simulation. In this simulation the parameters λ, η which identify with cutting conditions are led. That is, λ is the coefficient of cutting shape concerning with metal removal and η is the rate of swell out residual.
As a result it is found that the swell out phenomenon has a great part in the forming surface roughness in grinding process. And there exists the limit of surface roughness to be got in a given conditions for the existence of swell out phenomenon, and it is represented by λ. On the other hand η denotes the grinding efficiency. The larger the cutting edge distance (pitch: P) and the height of edge distribution increase, the larger the surface roughness becomes significant because of swell out residual within P<1.5 (P=cutting point spacing/cutting width).抄録全体を表示PDF形式でダウンロード (1086K)
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