巻号一覧
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36 巻, 427 号
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内山 弘1970 年 36 巻 427 号 p. 519-525
発行日: 1970/08/05
公開日: 2009/07/23
ジャーナル フリーRunout measurements are widely used because their results can be easily obtained. However, the meaning of information obtained from data of runout measurement is not always clear.
Purpose of the present paper is to make clear the meaning of runout. From analytical and experimental results, the following conclusions are derived.
(1) Runout is calculated using accumulated pitch errors on a right and the adjacent left tooth flank in a gear, namely from
frn= (FLn-FRn) /tan ψ, ψ=π/2Z-inv α0+tan α-2x tan α0/Z
where FLn and FRn are accumulated pitch errors on both flanks, Z is the number of teeth, α0 is standard pressure angle, α is pressure angle at the measuring point and x is coefficient of profile shift.
(2) Runout measurement is effective for determining the eccentricity and the errors resulting from the worm cyclic error in the gear generating machine.
(3) To obtain the worm cyclic error with high magnification, it is desirable to use a feeler diameter (dB) estimated from the following equation,
dB=dg· {tan (π/2J+α0) - (π/2J-π/2Z+tanα0+2xtanα0/Z)}
where dg is base circle diameter and J is number of waves in worm cyclic error.抄録全体を表示PDF形式でダウンロード (760K) -
圧粉体の焼結に関する研究 (第3報)吉川 昌範, 白鳥 武, 西本 廉, 浅枝 敏夫1970 年 36 巻 427 号 p. 526-531
発行日: 1970/08/05
公開日: 2009/07/23
ジャーナル フリーThe experiments have been carried out in order to examine generated phases, thermal analysis and hardness during sintering of Cu-30 Vol. % Al green compacts, and to examine generated phases, hardness and tensile strength at room temperature after sintering.
The results are as follows :
(1) During sintering.
Al4Cu9 (γ2-phase), Al2Cu (θ-phase) and AlCu3 (β-phase) generate till 650°C, and there is a close relation between generation of Al4Cu9 and remarkable expansion at about 450°C. An exothermic reaction generates at about 465°C, and this is supposed to be caused by generation of Al4Cu9. Hardness decreases as temperature raises, but it increases in the range of 400500°C, and becomes maximum at 500°C.
(2) After sintering.
The compacts sintered at 300, 400°C consist of Cu and Al, the compact at 500°C consists of Cu, Cu-9.5 wt. % Al solid solution, Al4Cu9, the compacts at 600900°C consist of Cu-9.5 wt. % Al solid solution, Al4Cu9. Hardness of the compacts sintered at temperatures higher than 500°C is remarkably high, and this is supposed to be caused by generation of Al4Cu9. The higher sintering temperature is, the higher tensile strength becomes, and the compact sintered at 500°C has remarkably high strength.抄録全体を表示PDF形式でダウンロード (5860K) -
被削材の動的挙動の解析隈部 淳一郎, 谷口 修1970 年 36 巻 427 号 p. 532-537
発行日: 1970/08/05
公開日: 2009/07/23
ジャーナル フリーIn the first report, in the case whereω /ωn<1 (ω : natural angular frequency of tool, ωn : natural angular frequency of work), the mechanism of unti-vibration state was clarified by analyzing the dynamical behavior of a work material under a pulsating cutting force in the cutting direction peculiar to a vibrating cutting tool.
In this report, it is clarified that in the regions of ω/ωn>>1, the displacement x of the work is determined only by the maximum pulsating thrust force Pt, the spring constant k of the work, the net cutting time tc per one cycle of the vibration of the cutting tool, and the period T of the tool vibration, and the dynamical behavior of the work can be represented by a formula x=Pt/k·tc/T.
In other words, when the pulsating cutting force is subjected to the work material, the work material does not make any dynamical displacement, and it is characterized by that compared with the case where a statical, thrust force is subjected to the work material, the displacement of work is reduced by tc/T. This mechanism is named “insensitive vibrating cutting mechanism”.抄録全体を表示PDF形式でダウンロード (723K) -
研削砥石の結合度測定に関する研究 (第1報)海野 邦昭, 篠崎 襄1970 年 36 巻 427 号 p. 538-544
発行日: 1970/08/05
公開日: 2009/07/23
ジャーナル フリーIn this paper, it is cleared that ultrasonic pulse propagates into grinding wheel and its velocity in grinding wheel depends upon its components.
The results obtained are as follows :
1. In case of grain percentage being constant, ultrasonic velocity in grinding wheel becomes higher in accordance with increase of bond percentage.
2. In case of bond percentage being constant, the larger grain percentage is, the higher ultrasonic velocity in grinding wheel becomes.
3. The relation between ultrasonic velocity in grinding wheel and that in each element of it is obtained experimentally.
4. The structure model of grinding wheel induced from propagation of ultrasonic pulse is discussed.抄録全体を表示PDF形式でダウンロード (2687K) -
林 巌, 石川 二郎, 林 輝1970 年 36 巻 427 号 p. 545-552
発行日: 1970/08/05
公開日: 2010/01/20
ジャーナル フリーThe authors tryed to measure a helical gear with a several kinds of profile testers and compared these results. Also we examined experimentally the transmission errors in the friction drive between base circle cylinder and straight edge of a base circle type profie tester. More over we theoritically investigated mesured errors due to the inclination of the center spindle of the tester, the position errors of feeler and the run out of base circle cylinder.
In consequence we got following results.
(1) The deviations of 2μm-6μm appeared in the values of tooth profile error and they correspond to 0 grade-3 grade of JIS. And 3μm-14μm appeared in the values of lead error and they correspond to 0 grade-5grade of JIS.
(2) The transmission errors due to the unexpected happenings such as slip was not observed. It is revealed that the movement is accurately transmitted from the straight edge to the base circle.
(3) Measuring error due to the run out of a base circle can be minimized by setting the direction of the vector of the run out pallarel to the straight edge.
(4) In some cases the values of spiral angle error due to the inclination of the center spindle become several minutes. These values can be obtained with formula (4).
(5) The length of tooth profile is due to accuracy of feeler position in the radial direction. The values of pressure angle error can be estimated within 4% by setting the feeler in the accuracy of±0.01mm.抄録全体を表示PDF形式でダウンロード (4243K) -
切削における動特性の解析 (第2報)竹山 秀彦, 坂田 興亜1970 年 36 巻 427 号 p. 553-559
発行日: 1970/08/05
公開日: 2009/07/23
ジャーナル フリーThe method proposed here is an approach to obtain frequency characteristic curve by means of inditial response. This paper treats with the method to compute the frequency characteristics of total cutting system, tool system and cutting zone from the output signal produced by the input of step function, which is given by a sudden increase of depth of cut, by assuming the Merritt's model. Firstly a simulation test is carried out to examine the feasibility of this method and to check the computer programme. The theoretical output through an assumed transfer function is computed when a definite step-function is applied to the system. After that the frequency characteristic curves of the system are calculated by sampling the foregoing theoretical output and compared with those directly computed from the assumed transfer function. Secondly, assuming that a cutting system is approximately linear, the linearlity between the input and output of cutting zone is examined by obtaining the frequency response curves of cutting zone for varied inputs.抄録全体を表示PDF形式でダウンロード (768K) -
神崎 一男, 板生 清1970 年 36 巻 427 号 p. 560-567
発行日: 1970/08/05
公開日: 2009/07/23
ジャーナル フリーThis paper presents the dynamic problem of the cam mechanism by which the positioning of the typehead may be controlled. In order to realize the high speed printer of fine print quality, it is necessary to keep the residual vibration of the typehead within limit and to make short the positioning time. Herein the dynamic characteristics and the positioning time with some basic motion cams are discussed in the treatment of the mechanism as a single-degree-offreedom system.
The results obtained are as follows :
(1) In case of undamped system, the residual vibration strongly depends upon the cam speed through the ratio λ=t1/t0, where t0 denotes the natural vibration period of the system and t1 the duration of the rise period. The vibration disappers at λ=λi (i=1, 2...) which are characteristic to any cam form, but increases abruptly when λ varies a little.
(2) In case of viscous damped system, the vibration surely occurs, but tends to decrease monotonically with the increase of λ.
(3) The positioning time is influenced by both the cam form and viscous damping for 1<λ<B, but is hardly influenced by the cam form except that range, where B is constant whichdepends upon the allowable value.抄録全体を表示PDF形式でダウンロード (4532K) -
組合せ形カスケード増幅空気マイクロメータ (第3報)山本 巌1970 年 36 巻 427 号 p. 568-577
発行日: 1970/08/05
公開日: 2009/07/23
ジャーナル フリーThis paper is concerned in static transfer characteristics of the pneumatic micrometer system with both hybrid pressure cascade connection and linear feedback. The static transfer characteristic expression is shown as the sum of the transfer characteristic of the linear feedback path and that of the forward circuit which consists of a series of two pneumatic micrometer single circuits. Using the same pneumatic circuit element informed in the previous report No. 2, the static characteristic curve is concretely introduced, and the effect of the input stage initial operating point, the coupling transducer gain, the feedback transducer gain and the compliance between the gauging nozzle and its counter-face on the transfer characteristic curve are discussed. It is also described on a three stage pneumatic amplifier having additional intermediate amplifier curcuit which is good for getting very high amplification.抄録全体を表示PDF形式でダウンロード (3479K) -
田中 義信, 井川 直哉, 田中 武司, 柳沢 猛, 森岡 幹夫, 中村 喜十郎1970 年 36 巻 427 号 p. 578-584
発行日: 1970/08/05
公開日: 2009/07/23
ジャーナル フリーPDF形式でダウンロード (7164K)
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