巻号一覧
後続誌
23 巻, 272 号
選択された号の論文の8件中1～8を表示しています
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井上 潔1957 年 23 巻 272 号 p. 475-480
発行日: 1957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 (2211K) -
切削抵抗に及ぼす温度の影響大越 諄, 飯田 喜介, 尾関 和夫1957 年 23 巻 272 号 p. 481-484
発行日: 1957年
公開日: 2009/06/30
ジャーナル フリーCuttime forces at elevated temperature of work material (paraffin) were calculated in various cutting conditions experimented.
In general, the higher the temperature, the lower the cutting force.
Cutting force is affected by two factors; one is the shear strength of work material and the other is the factor related to the cutting mechanism. The former was decreased exceedingly at high temperatur as reported previously (Part 2), and influences of the latter is not so much. Therefore, the decrease of cutting forces is mainly due to low shear stren-gth of work material at high temperature.抄録全体を表示PDF形式でダウンロード (501K) -
井形 厚臣, 大石 清1957 年 23 巻 272 号 p. 485-488
発行日: 1957年
公開日: 2009/06/30
ジャーナル フリーThe sharpening method of circular cutleries by electrolytic polishing was discussed in the previous report. The level of electrolytic solutions was kept constant and the resultant shapes of the cross section of the edge were comparatively slender. In this research the relatively slow motion between the level of the solution and the circular discs of the cutleries, that is, the gradual elevation of aqueous level was given by adequate attachments. Then the resultant shape of the polished edge was very desirable, that is a form was thick in the inner side and sharply thin in the peripheral side. This shape coincides with the theoretical estimation.
The details of the experiment are explained and the results are discussed.抄録全体を表示PDF形式でダウンロード (447K) -
鉄合金に対するショットピーニング効果浅枝 敏夫, 西本 廉1957 年 23 巻 272 号 p. 488-491
発行日: 1957年
公開日: 2009/06/30
ジャーナル フリーThe shot-peening effects on some structures of iron alloys such as ferrite, pearlite and martensite structure were already described in the 5th report. Now, in this report N, e studied the shot peening effects on the sorbite, troostite and austenite structure of iron alloys. The pearlite plus cementite and martensite were used as the reference structure. The centrifugal wheel peening machine was used to shot-peen the test pieces and the residual stress, the depth of surface layer and the work-hardening effects were checked to estimate the peening effect.
The results were as follows :
(1) The greatest effect of shot-peening Was obtained on the martensite structure, secondly on the troostite, then on the pearlite+cementite and the smallest on the sorbite.
(2) The austenite structure was work-hardened not only on the surface, but also over the whole section of test piece. The residual stress on the surface was considerably low.抄録全体を表示PDF形式でダウンロード (696K) -
中山 一雄1957 年 23 巻 272 号 p. 491-495
発行日: 1957年
公開日: 2009/06/30
ジャーナル フリー以上を総括すると, 0.496炭素鋼と18-8不銃鋼を切削する際, 被削材温度と切削速度とが切削抵抗, 勇断角, 切屑と工具との摩擦角, 匁先温度等にいかなる影響を及ぼすかを調べた。又その結果を考察した結果, 切削条件による切削抵抗の変化は勢断面の勢断応力及び切屑と工具との摩擦角の変化によつて説明することができ, 摩擦角の変化はすくい面及び勇断面の両所における被削材の勢断流動応力の変化から説明づけられた。
之等の説明は定性的なものであり, 之を定量的なものにするには, 切削現象の複雑性から考えて, 多くの困難を伴うことが予想される。然し以上の説明によつて, 切削機構を根本的に支配するのは被削材の勢断流動応力の温度による変化であることがわかり, 高温切削を含めた一般の切削において, 切削条件による切削抵抗, 摩擦角, 勇断角等の変化を予測する手がかりを得ることができた。抄録全体を表示PDF形式でダウンロード (942K) -
-工具研磨条件と工具の切削性-竹山 秀彦1957 年 23 巻 272 号 p. 496-500
発行日: 1957年
公開日: 2009/06/30
ジャーナル フリーTool-chip contact area has been demonstrated, by the previous papers, to be a controlling factor of machinability in terms of chip formation, shear angle, cutting force or surface finish. Since tool grinding conditions such as tool face roughness or grinding direction with regard to the chip flow have something to do with tool-chip contact. area, it can be easily supposed that tool grinding conditions will influence upon the tool performance appreciablly.
The test results have revealed that the tool face roughness of about 1.5 microns makes the smallest tool-chip contact area that means the best tool performance from the point of view mentioned above. The cutting force with a mirror lapped tool is nearly twice as that with a tool of the optimum roughness. By almost the same reason the best result can be attained when the grinding direction of the rake face is 40 or 45 degrees with regard to the chip flow. This means that the grinding conditions of a rake face control the metallic contact between chip and tool face or consequently the tool-chip contact area which greatly affects machining characteristics such as chip formation, cutting force, surface finish or sometimes tool life.抄録全体を表示PDF形式でダウンロード (1095K) -
山本 健太郎1957 年 23 巻 272 号 p. 501-504
発行日: 1957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 (796K) -
1957 年 23 巻 272 号 p. 509-511
発行日: 1957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 (585K)
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