巻号一覧
後続誌
24 巻, 279 号
選択された号の論文の7件中1～7を表示しています
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大越 諄1958 年 24 巻 279 号 p. 233-238
発行日: 1958/05/05
公開日: 2009/06/30
ジャーナル フリーPDF形式でダウンロード (1299K) -
被切断材料の影響について篠原 茂之1958 年 24 巻 279 号 p. 239-242
発行日: 1958/05/05
公開日: 2009/06/30
ジャーナル フリーIt can be proved from the experiment that the maximum speed of electric discharge saw-ing is independent of the components of work material, although the conditions of electric discharge sawing change according to the work materials.
This is explained from the following : The temperature at the electric discharged point is so high, that eroding capability has scarcely any relation with the mechanical, electrical and physical properties of the work in room temperature. And the burnt film of water glass and oxidized layer of the work are two kinds of dielectrical films necessary for the continuation of electric arc discharge.抄録全体を表示PDF形式でダウンロード (727K) -
浅枝 敏夫, 西本 廉1958 年 24 巻 279 号 p. 243-248
発行日: 1958/05/05
公開日: 2009/06/30
ジャーナル フリーThis paper describes how the magnitude and distribution of residual stresses in cold-rolled 4-6 brass sheets are affected by the reduction and the annealing temperature before rolling. For this purpose the residual stresses in the traverse direction as well as in the rolling direction are measured.
The results obtained are summarized as follows :
(1) The distributions of the residual stresses in the rolling direction are of the same type ; tension in the surface and compression in the inner layer.
(2) The annealing temperature of 600°, 650° and 700°C causes nearly the same residual stresses in the rolling direction.
(3) The residual stresses in the traverse direction are changed remarkably by the annealing temperature ; the stress caused by the rolling after annealing at 600°C is much greater than that at 650° and 700°C. And the type of stress distributions is oscillation type, in which compressive and tensile stresses exist alternately.
(4) The rate of reduction is almost independent of the residual stresses in both directions.抄録全体を表示PDF形式でダウンロード (1311K) -
大越 諄, 篠崎 襄1958 年 24 巻 279 号 p. 249-254
発行日: 1958/05/05
公開日: 2009/06/30
ジャーナル フリーOne of the distinguished traits of CSM cutter is double radial raking of blades. Double radial raking not only directs the cutting force vector to the centre line of a cutter but also reduces cutting powers. Double radial raking forces the contact lengths between chip and blades to shorten, and it is the cause of reduction of cutting powers.抄録全体を表示PDF形式でダウンロード (1325K) -
鋼球ラヅピングにおけるラヅプ圧-(2)井戸 守, 羽地 務1958 年 24 巻 279 号 p. 254-258
発行日: 1958/05/05
公開日: 2009/06/30
ジャーナル フリーExperimental results on the lapping of steel balls with the diameter of about 1 mm are as follows:
1. The rate of cutting in lapping steel balls is not proportional to the lapping pressure, owing to the crush of abrasives and the metallic contacts between the ball and the lap. These results are obtained when the abrasives are supplied intermittently with comparatively short intervals.
2. The optimum lapping pressure may exist when the sphericity of steel balls and the rate of cutting are considered. It is expected from the lapping mechanism that the optimum condition is variable due to the condition of lapping composition associated with diameter of the steel ball and feed interval of the composition.
3. The increasing rate of sphericity is connected with the lapping pressure. The maximum increasing rate is obtained when the grits are embedded actively into the lap and when no metallic contact occurs.
4. The rate of cutting performed with nylon lap is not different from that with cast iron lap when the lapping pressure is low. The increasing rate of sphericity is, however, almost proportional to the lapping pressure.
5. Nylon lap is effectively used for the fine finish in regard to the wear of lap, the residual stress, the sphericity, and the surface roughness of the work-piece.抄録全体を表示PDF形式でダウンロード (1148K) -
小林 正己, 塚田 龍二1958 年 24 巻 279 号 p. 259-261
発行日: 1958/05/05
公開日: 2009/06/30
ジャーナル フリー材料規格には引張試験に次いで重きをなすカタサ試験は時には他の機械的試験の代りに行なわれることが多い。
しかしその信頼度は割合に少なく試験をしても参考程度にと黛まる場合も少なくない。カタサ値が直接その材料の価値を左右するものでなく他の機械的性質に対する一つの目安に過ぎないからではあるまいか。カタサ試験を有効ならしたるたたにはその信頼度を高たなければならない。最近はカタサ試験に対する関心も次第に高まりつゝあり信頼度も増加しているかに見える。カタサ試験のうちブリネルとビッカースは基準が得られやすいのに反し,ロックウエルとショアは基準の決定が函難である。
従つて巷間に問題の起ぎるのも後者が多く何れが甲乙かをつけられず調停がでぎない。東京都立工業奨励館では生産工場におけるロックウエルカタサの実態を明らかにし,併せてその技術的向上とカタサ混乱を調整するため次のような調査を行なつた。抄録全体を表示PDF形式でダウンロード (386K) -
1958 年 24 巻 279 号 p. 266-268
発行日: 1958/05/05
公開日: 2009/06/30
ジャーナル フリーPDF形式でダウンロード (545K)
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