巻号一覧
後続誌
41 巻, 483 号
選択された号の論文の15件中1～15を表示しています
- |<
- <
- 1
- >
- >|
-
堀内 義和1975 年 41 巻 483 号 p. 305-311
発行日: 1975/04/05
公開日: 2010/02/16
ジャーナル フリーIt is strange and curious that the limits and ranges of pressure angles of involute spur gears, which is so to speak the " A, B, C " of these gears, have not yet been completely solved. In this paper, this fundamental problem is throughly investigated from various angles and we got the results to the followings;
(1) for rack-pinion gearings 0<α≤π/4,
(2) for external gearings 0<α<π/4,
(3) for internal gearings 0<α≤αεg,
wherein, contact ratio ε, gear ratio g being given.
Whereas, only gear ratio g being given 0<α≤αg(≡α1g>αεg, ε>1).
The equations for obtaining αεg, αg are referred to the original paper.抄録全体を表示PDF形式でダウンロード (916K) -
佐田 登志夫, 稲村 豊四郎1975 年 41 巻 483 号 p. 312-318
発行日: 1975/04/05
公開日: 2009/06/30
ジャーナル フリーA new analytical method to evaluate the dynamic cutting coefficients in generalized three-dimensional cutting is presented in this paper. The method is developed based on the shear plane model and the static three-dimensional model of gutting, and can determine the stiffness coefficients in dynamic three-dimensional cutting using a few kinds of data obtained by the steady state orthogonal cutting. The dynamic cutting experiments are carried out under various cutting conditions, confirming the validity of the present method. The analytical results as well as experimental ones show the increase of the inner and outer modulation effects with increasing the side cutting edge angle or the nose radius of tool. The results enable one to predict the onset of chatter in any three-dimensional cutting with knowing the dynamic stiffness of machine-tool, tool and workpiece.抄録全体を表示PDF形式でダウンロード (971K) -
村奈嘉 与一, 塚田 光芳, 古川 英一1975 年 41 巻 483 号 p. 319-324
発行日: 1975/04/05
公開日: 2009/06/30
ジャーナル フリーA simple electromagnetic device is developed for lengthening the natural period of torsional vibration pickup, utilizing a conventional eddy-current damper which is one of the essential elements of the seismic pickup of long natural period. A rectangular coil of small number of turn, connected to a DC source, is bonded on a surface of the plate conductor of the damper in such a way that two facing sides of the coil intersect respectively leakage fluxes existing symmetrically on both sides of the permanent magnet of the damper. By proper dimensioning of the coil, each of two facing sides travels inside a range within which the leakage-flux density varies with respect to the travel of coil as linearly as possible; thus a controllable negative restoring torque is electrodynamically generated to lengthen the natural period, and the resulting natural period can be pasily controlled by adjusting the coil current. The principle of operation of the device and limiting factors for lengthening the natural period are discussed in detail. Under a laboratory condition, the natural period Of 1 s can be lengthened to as long as 7 s.抄録全体を表示PDF形式でダウンロード (3375K) -
加工軟化の研究(第2報)飯田 喜介, 山下 菊丈1975 年 41 巻 483 号 p. 325-331
発行日: 1975/04/05
公開日: 2009/06/30
ジャーナル フリーWork softening of steel prestrained as compression and tension at room temperature was reported already. This report describes work softening obtained from deformation by compression, tension and torsion for steels prestrained by drawing with 4 rollers and torsion. Evident difference between work softening and Bauschinger effect was obtained from the experiment of torsion forward and reverse direction. The decrease of Rockwell superficial hardness number in the experiment was up to 8.1% from compressed steel prestrained by drawing.抄録全体を表示PDF形式でダウンロード (977K) -
松尾 誠太郎, 高本 喜一, 中山 了1975 年 41 巻 483 号 p. 332-337
発行日: 1975/04/05
公開日: 2009/06/30
ジャーナル フリーThe changes which occur in surface features during ion etching are investigated from the theoretical analysis based on the dependence of etch rate on the angle of ion incidence. The practical applicabilities of the theoretical results are shown by the experiment on etching of fused quartz with an RF sputtering apparatus. The main results obtained are as follows:
(1) The etch rate V(θ) (θ; the angle of ion incidence) in the direction of ion incidence is expressed in the form; V(θ) = V0(1+A sin2 θ)sec θ. By choosing the suitable value of A, V(θ) is in quantitative agreement with the experimental values for various materials. The value of A for fused quartz is 3.
(2) The variation of the surface topography obeys the eikonal equation in optics. Therefore, the features of etched surface are equivalent to those of the wave fronts which propagate with the constant velocity (2A+1)V0 in the direction of the normal to the wave-front.
(3) The etched surface comprises many spherical concavities.
(4) The surface roughness decreases in proportion to (2A+1) and the square of the frequency.抄録全体を表示PDF形式でダウンロード (3343K) -
円筒プランジ研削のびびり(第2報)鴻巣 健治1975 年 41 巻 483 号 p. 338-343
発行日: 1975/04/05
公開日: 2009/06/30
ジャーナル フリーThis paper deals with analysis of the transition phenomena changed from the stable to the unstable grinding. From the previous paper, the grinding system can be expressed by the model of the parametric vibration system, and so it is made the Mathieu's equation. The parametric factor on its equation, which is the "working state" of the grinding wheel periphery, is given the criterion of the stable grinding. The characteristic phenomenon, which is progressive increasing chatter-amplitude, can't be explained by the usual regenerative theory, but can be made clear by the above method. The experimental results obtained the approximate 40% agreement with the theoretical analysis. Futhermore, the principle of chatter prevention is considered by means of this method.抄録全体を表示PDF形式でダウンロード (6243K) -
2m標準尺測定用レーザ干渉計(第1報)清野 昭一, 桜井 好正, 阿部 佳夫1975 年 41 巻 483 号 p. 344-350
発行日: 1975/04/05
公開日: 2009/06/30
ジャーナル フリーThe paper describes an automatic laser interferometer for the calibration of line standards up to 2 m which is developed in National Research Laboratory of Metrology. The principles of construction, the performance of the apparatus and the errors arised from the apparatus are given. The errors caused by the misalignments of the optical systems, by the mechanical deformation of the base member and by fluctuation of translation speed of the carriage are estimated. Experiments have shown the errors are less than 0.2 μm.抄録全体を表示PDF形式でダウンロード (2900K) -
金属円板の絞り-張出し河合 望, 後藤 学, 黒崎 靖1975 年 41 巻 483 号 p. 351-357
発行日: 1975/04/05
公開日: 2009/06/30
ジャーナル フリーDeep-drawing, pure stretch-forming and combined-forming tests are carried out in order to clarify the relationship between the relative load-carrying capacity Tcr/(A0ST) and the press formability of circular blanks for various kinds of sheet metals; where Tcr is the fracture force, A0=2πr1t0 the initial cross-sectional area of a blank at punch radius r1, t0 its initial thickness and ST tensile strength of the metal used. It is confirmed both experimentally and theoretically that the forming depth has a significant correlation with Tcr/ (A0ST). Besides, a close correlation between the values of Tcr/(A0ST) obtained from each of the forming tests examined has been also confirmed. Therefore, once this parameter is gained in any of these tests, it is approximately effective to the formability in all.抄録全体を表示PDF形式でダウンロード (1308K) -
津和 秀夫, 山田 弘文, 河村 末久1975 年 41 巻 483 号 p. 358-363
発行日: 1975/04/05
公開日: 2009/06/30
ジャーナル フリーIn this paper, the length of arc of contact during the plunge cut grinding process with a surface grinder is studied. The actual value of this length is 20-30% bigger than the theoretical value which has been used in surface grinding process up to the present. Moreover, this arc length increases relative, to an increase of grinding force. It seems that this phenomena occur due to the fact that the wheel and the work deform elastically in the grinding process. Under the assumption that the quantities of the elastic deformation near the contact are is found using Hertz's static contact models the following relation is obtained:
ls={DG(t+δ2)}1/2+(DG·δ2)1/2
where ls; length of arc of contact
t ; depth of cut
δ2 ; quantities of elastic deformation
DG; wheel diameter
The computated values seemed in coincidence with the experimental ones in this experiments.抄録全体を表示PDF形式でダウンロード (2824K) -
平面研削における工作物の熱変形の研究(第2報)中野 嘉邦, 太田 勝彦1975 年 41 巻 483 号 p. 364-368
発行日: 1975/04/05
公開日: 2009/06/30
ジャーナル フリーIn the preceding paper, the deformations of workpieces during surface grinding and the profile errors of the finished workpieces were studied experimentally. In this paper, in order to clarify the mechanism of the deformations and the profile errors of the workpieces, the temperature distributions and the thermal deformations of the workpieces under the steady-state conditions, under which the heat flowed into the workpieces through the ground surfaces are equal to the heat transferred out to the atmosphere through all the surfaces of the workpieces, are analysed by using the finite element method and the calculated results are compared with the experimental results. This study confirms that the analytical results agree approximately with the experimental results and that the principal cause of the convex deformations during grinding and the concave profiles after grinding shown in the preceding paper is the unequal temperature distributions due to the grinding heat.抄録全体を表示PDF形式でダウンロード (831K) -
大庫 和孝, 中島 耕一, 粟野 泰吉1975 年 41 巻 483 号 p. 369-373
発行日: 1975/04/05
公開日: 2009/06/30
ジャーナル フリー以上に示す一連の実験結果をまとめると,過共晶Al-Si合金の切削にあたり,
(1)超硬工具材を切削工具として使用すると,切削過程において被削材内のSiと工具内のバインダーCoとが置換する.一方,ADC12およびAC8Bの切削の場合では工具摩耗の激しい切れ刃稜側で,AlにくらべSiが多量に付着している.
(2)サーメット工具材を使用すると被削材内のAlと工具材内のバインダーNiとが置換している.
(3)Al2O3系セラミック工具材を使用すると,工具材の激しい移着が生じている.
(4)過共晶Al-Si合金切削に対し耐摩耗性のある工具材としては,その材質がAlおよびSiと親和性に欠けるものであることが望ましい.抄録全体を表示PDF形式でダウンロード (764K) -
ベルト研削に関する研究(第5報)難波 義治, 津和 秀夫1975 年 41 巻 483 号 p. 374-378
発行日: 1975/04/05
公開日: 2009/06/30
ジャーナル フリーThis paper deals with the ground surface roughness theoretically and experimentally, which is one of the most important value in grinding technique. Basing on the results of scratch-deformation experiment using a single abrasive grain, the theoretical formula is presented on the surface roughness of metals ground by a contact wheel type belt grinder. The formula has five variables, that is, numbers of cutting edges existing in the contact area between the abrasive belt and the workpiece, normal load applied to the contact area, the hardness of the workpiece, the pointed angle of abrasives and the factor obtained from the scratch test. The formula can explain the effects of contact wheel, of grain size and of grain wear to the ground surface roughness from the standpoint of the number of cutting edges in the contact area. The adequacy of the formula is discussed by the results of the grinding test. The formula may give the approximate value which can be used in metal processing industries.抄録全体を表示PDF形式でダウンロード (767K) -
切削力の変動について長谷川 嘉雄, 花崎 伸作, 鈴木 康夫1975 年 41 巻 483 号 p. 379-384
発行日: 1975/04/05
公開日: 2009/06/30
ジャーナル フリーIn the cutting of aluminium and its alloys, the surface finish is often inferior, and the variation of cutting forces is considerably large. In this paper, the relation between the variation of cutting forces and overcutting phenomenon is described. Then the cause of overcutting is experimentally discussed. Some results obtained in this paper are as follows:
(1) In the repeated orthogonal cutting of pure aluminium (1100) at low speed, the cutting forces vary in each cutting.
(2) The finished surface is deeply overcut without a built-up edge. The depth of overcutting becomes often comparable with the depth of cut.
(3) There exists the explicit relation between the cutting forces and the actual cutting area, i. e. the actual cutting area is consistent with the cutting forces.
(4) The cause of overcutting is the friction on the rake face, which restrains the chip flow.抄録全体を表示PDF形式でダウンロード (11143K) -
方向性をもつ均一形状突起モデルによる理論的考察石垣 博行, 木原 利喜, 川口 格1975 年 41 巻 483 号 p. 385-391
発行日: 1975/04/05
公開日: 2009/06/30
ジャーナル フリーTheory of contact between a sphere and a rough plane involves a difficulty that the deformation of the subsurface material should be compatible to the deformation of the surface asperity. An approximate method in which the subsurface displacement is expressed in a quadratic equation having two unknown constants is considered to solve the above problem. These two constants are so determined by iterative method as the subsurface displacement is compatible to the surface asperity displacement. In order to clarify the theoretical basis of this method and to discuss the approximating error, this method is applied to the contacts between a sphere and such a simple model surface that uniform hemicylindrical protuberances are arranged unidirectionally. The deformation of material is assumed to be elastic for the subsurface material and to be either elastic or plastic for the surface asperity. The numerical results show that the directional arrangement of surface asperity gives the directional effect upon the deformation of subsurface material, and that the pressure at the peak of asperity is extremely high, and so on. Some experimental results are shown to verify the validity of the analysis.抄録全体を表示PDF形式でダウンロード (3017K) -
竹山 秀彦, 吉川 悌二, 高田 孝次1975 年 41 巻 483 号 p. 392-394
発行日: 1975/04/05
公開日: 2009/06/30
ジャーナル フリーPDF形式でダウンロード (519K)
- |<
- <
- 1
- >
- >|