巻号一覧
後続誌
38 巻, 452 号
選択された号の論文の10件中1～10を表示しています
- |<
- <
- 1
- >
- >|
-
小林 昭1972 年 38 巻 452 号 p. 708-714
発行日: 1972/09/05
公開日: 2010/02/16
ジャーナル フリーPDF形式でダウンロード (1627K) -
緒方 省三, 新井 貴雄, 村奈 嘉与一, 古川 英一1972 年 38 巻 452 号 p. 715-720
発行日: 1972/09/05
公開日: 2009/06/30
ジャーナル フリーA seismic instrument for measuring the hob-to-table cyclic error of large gear hobbing machine is described in which a large and heavy torsional vibration pickup, currently in use for detecting the non-uniformity of rotation of the machine table, is replaced by a pair of small and light rectilinear vibration pickups mounted tangentially on a periphery of the machine table, 180 apart. Two differential-transformer seismic pickups of 1.6 s natural period are connected so as to be additive for the rotational vibration and null each other for the rectilinear vibration of the machine table. The sensitivity for rotational vibration increases in proportion to the table diameter, the minimum measurable angular displacement being 0.0025 sec of arc for the table diameter of 6 m.
From theoretical analysis of the motion of the seismic system under working condition, it is shown that the equality of the sensitivities and frequency responses and the parallelism of the sensitive axes of both pickups, and the accuracy of the machine alignment are important factors in determining the measurement error; and these factors are examined in detail. The operating principle of the instrument and the adjustment and calibration of pickups, together with the test results on the bobbing machines of 2 m and 6 m in table diameter, are outlined.抄録全体を表示PDF形式でダウンロード (2477K) -
武田 孝一, 大西 利美1972 年 38 巻 452 号 p. 721-725
発行日: 1972/09/05
公開日: 2009/06/30
ジャーナル フリーThis paper deals with tool conditions on fine blanking of relatively thick hot rolled steel sheet of a 6 mm gauge. The effects of tool clearence and height, position, and depth of indentation of the V-ridge are examined.
The results are as follows;
1) The V-ridge on the die is more effective to obtain smooth sheared surface than that on the blankholder.
2) The V-ridge on the die has to be fully indented before the punch starts blanking.
3) It is recommendable to adopt relatively lower height of the V-ridge on the die than that on the blankholder to reduce tool load and blankhoding pressure.
4) It is more effective that the position of the V-ridge on the die is nearer to the blanking edge up to about one third of sheet thickness.抄録全体を表示PDF形式でダウンロード (2471K) -
炭素鋼,黄銅,アルミニウムの切削実験と解の実現性高田 孝次, 白樫 高洋, 星 光一, 臼井 英治1972 年 38 巻 452 号 p. 726-732
発行日: 1972/09/05
公開日: 2009/06/30
ジャーナル フリーKudo's slip line solutions are compared with the results of machining of carbon steels, α-brass and pure aluminium under various cutting conditions.
For the cases of α-brass and other non-ferrous metals which show the coefficient of friction on the rake face less than unity, the solutions are verified to be sucessfully constructed so as to fit measured shear angle φ, friction angle β and observed secondary flow along the tool face. The solutions, however, fail to account for the case of pure aluminium, since the actual coefficient of friction is more than unity.
For the cases of carbon steels, the solutions are unable to be constructed so as to fit the measured φ, β and the secondary flow. The reason for the unsuccess may be attributed to the paticular nature of the secondary flow along the tool face. Eliminating the secondary flow layers as a particular form of built-up edge, the solutions are successfully constructed.
The cutting forces predicted by the solutions for a constant maximum shear stress are in good agreement with the measured forces for the case of α-brass and for the cases carbo steels as well, if the secondary flow layers are eliminated.抄録全体を表示PDF形式でダウンロード (9423K) -
モンテカルロ法による接触現象の解析方法の評価瀬戸口 良三1972 年 38 巻 452 号 p. 733-738
発行日: 1972/09/05
公開日: 2009/06/30
ジャーナル フリーIn the 1st report, the 2nd report, and the 3rd report concerned with the study on the mechanism of contact phenomena of the solid, the quantities about the state of the contacts between the static contact and the dynamic contact caused by the relative motion has been determined.
In this paper, the method of the analysis and evaluation about the quantities of the state of contacts is applied on the rugged surfaces, which is wellknown for the quantities of the state of contact, made by the Monte-Carlo method simulation, and then it is proved by evaluating the accuracy of the method and the surface structures, especially the geometrical relations, that the method is proper.
The main evaluated affairs are as refer:
(1) The determination method of the statistical group of the solid surface and its accuracy.
(2) The 1st differential order between the roughness amplitude distribution and the height distribution of the asperities.
(3) The equality of the diameter between the asperity and the caluculation basic on the roughnees curve.抄録全体を表示PDF形式でダウンロード (1092K) -
中島 孝慈, 三井 寿雄, 藤城 郁哉, 平松 孝雄1972 年 38 巻 452 号 p. 739-744
発行日: 1972/09/05
公開日: 2010/02/16
ジャーナル フリー4000kg/cm2までの静水圧力下で抵抗線ひずみ計の挙動を調べ,つぎの結果を得た.
(1)抵抗線ひずみ計のベース層の厚さにはかなりのばらっき(フォイルゲージでは30～60μ)があり,たとえ接着層の厚さ(通常10μ程度)を均一にしても,ベース層および接着層の総厚さは変わる.静水圧力のみによるゲージ出力は,ゲージのタイプにかかわらず,これらの層が厚くなるほど大きくなり,圧力の効果が減少する.
(2)ベークライトワイヤゲージおよびエポキシフォイルゲージでは,アクティブとダミーのベース層厚さを等しく選んだところ,静水圧力によるゲージ率の変化を認めなかった.したがって,これらのゲージを用いた荷重計では常圧力下の検定値を静水圧力下で準用できる.抄録全体を表示PDF形式でダウンロード (964K) -
最大ポンチカを求める解法佐川 武俊, 竹山 寿夫1972 年 38 巻 452 号 p. 745-751
発行日: 1972/09/05
公開日: 2009/06/30
ジャーナル フリーThe axisymmetrical deep drawing of a circular blank of sheet metal with a punch of semi-spherical type and a die is analysed by means of both the strain incremental theory and the logarithmic total strain theory, taking work hardening and anisotropy into consideration and neglecting elastic strains and bending effect.
This paper presents the analytical method obtaining the maximum punch load in the deep drawing.
There is good agreement between the punch load-stroke diagrams by both theories.
The theoretical relations between the maximum punch loads and various operating variables are in qualitatively close agreement with the experimental ones which have been obtained.抄録全体を表示PDF形式でダウンロード (929K) -
補強の限界と最適補強径山本 明1972 年 38 巻 452 号 p. 752-758
発行日: 1972/09/05
公開日: 2010/02/15
ジャーナル フリーA design principle is proposed on the reinforced vitrified grinding wheels with harder grade material or resin-penetration around the arbor hole. And, through this design procedure, an adequate combination of two wheel materials to be used and an appropriate dimensions (inner-outer diameter ratio a and reinforced material diameter ratio f) are discussed for getting larger increasing ratio R in centrifugal bursting speed by reinforcement. Main results are as follows:
1) The maximum value Rmax of R grows larger with decreased a and this enables to manufacture the wheel having larger bursting speed than that of the inner material. The optimum value fmax of. f resulting in Rmax comes near the inner diameter when a<0.5, but near the outer diameter when a>0.5. fmax and Rmax vary by the Young's modulus ratio A and the density ratio B of the outer material to the inner material.
2) For the reinforcement A<1 and B<1 are necessary, and for getting the maximum profits by reinforcement A_??_0.8 and B_??_0.9 are recommended from considerations of qualities and dimensions of wheels used generally. Hereupon, it goes without saying that a considerable increase in bursting strength of each wheel material is required.
3) Resin-penetrated reinforced wheels are expected theoretically an increment of about twenty percent in the bursting speed from without penetration, but its attainment depends upon completeness of resin penetration in manufacturing.
4) The experimental results are almost in good agreements with the calculated ones.抄録全体を表示PDF形式でダウンロード (1209K) -
加工変質層分科会1972 年 38 巻 452 号 p. 759-769
発行日: 1972/09/05
公開日: 2009/06/30
ジャーナル フリーPDF形式でダウンロード (2573K) -
放電加工機の性能調査分科会1972 年 38 巻 452 号 p. 770-771
発行日: 1972/09/05
公開日: 2009/06/30
ジャーナル フリーPDF形式でダウンロード (251K)
- |<
- <
- 1
- >
- >|