巻号一覧
後続誌
19 巻, 217 号
選択された号の論文の9件中1～9を表示しています
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野本 明1953 年 19 巻 217 号 p. 131-134
発行日: 1953/04/05
公開日: 2009/06/30
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新しい測定法および一,二の測定例浅尾 晴海, 越智 隆冬1953 年 19 巻 217 号 p. 135-138
発行日: 1953/04/05
公開日: 2009/06/30
ジャーナル フリーUp to this time, in order to get the value of thermal diffusivity k, we have measured the values of heat conductivity K, density p and specific heat c of materials, and calculated from the equation K/cρ.
But this method requires much labour and time, so we established a new method to measure them directly. By means of this method we can measure the value of K very esaily and accurately. In this paper we explain this new method and show some results obtained by this method.抄録全体を表示PDF形式でダウンロード (820K) -
黄銅の磨耗について葉山 房夫, 渡辺 侊尚1953 年 19 巻 217 号 p. 139-142
発行日: 1953/04/05
公開日: 2010/02/16
ジャーナル フリーThe Research on the wear of copper alloy bearings is, at present, being continued. This is a report on the wear of brass bearings.
The results obtained were as follows:
1. The effect of rubbing condition.
At a comparatively high speed, wear was stable, but as a speed became lower, wear increased gradually and it was maximum at the velocity of 1-2mm/s. As to the rubbing pressure, wear was almost proportional to the pressure.
2. The effecct of adding elements (Al, Si, Fe, Sn, Pb, etc.)
By adding Al, Si, Ni, or Fe, brass bore wear-resisting property, but when Sn or Pb was added, wear increased remarkably.
3. The effect of mechanical property.
The impact value and the high temperature hardness (500°C) seemed to have relation considerably with wear, but these are still under experimentation.抄録全体を表示PDF形式でダウンロード (845K) -
益田 亮1953 年 19 巻 217 号 p. 143-148
発行日: 1953/04/05
公開日: 2009/06/30
ジャーナル フリーA formula for blank-diameters of thread rolling is developed here from the calculation of the volume of one thread. The theoretical diameter is affected by the surface roughness of blank and the axial elongation during thread rolling. Such effects are able to be diminished by the blank-finishing and thread rolling method.
The approximate distribution of the thread dimensions by rolling can be theoretically ditermined by the distribution of the blank-diameter, the thread rolling dies' form and the elastic deformation of the machine.抄録全体を表示PDF形式でダウンロード (730K) -
田中 義信, 筒井 忠夫1953 年 19 巻 217 号 p. 149-154
発行日: 1953/04/05
公開日: 2010/02/16
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研削切屑の温度と研削面の温度佐藤 健児1953 年 19 巻 217 号 p. 154-160
発行日: 1953/04/05
公開日: 2010/02/16
ジャーナル フリーIn order to find the heat distribution in grinding, the mean chip temperature is measured by a water calorimetry method, and the work surface temperature by touching an Almel-Chromel thermocouple. Then, the temperature of wheel-work contact surfaces is calculated from the heat quantity conducted into the work through the contact area.
The results are as follows:-
1) The heat distribution in the process of grinding is found that about 85% of total energy is conducted to the work, 12% to the wheel, and only 3-5% of heat runs away with the chip.
2) The heat conducted to the work in the process of grinding increases as the depth of cut increases, and also as the speed of table feed decreases.
3) In grinding mild.steel by A36L-Vit 7'' wheel, the chip temperature measured is about 300-400°C, in case the wheel surface speed is 1140m/min, the work surface speed 60m/min. the table feed speed 100 mm/min and the depth of cut 0.012mm in radius without any grindiug fluid.
4) The wheel work interface temperature iucreases in proportion to Δ0.63, where Δ is the depth of grind, and it reach-s easily over 1000°C in normal grinding conditions.抄録全体を表示PDF形式でダウンロード (1073K) -
浅野 徹, 和田 尚1953 年 19 巻 217 号 p. 161-163
発行日: 1953/04/05
公開日: 2010/02/16
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1953 年 19 巻 217 号 p. 165-169
発行日: 1953/04/05
公開日: 2009/06/30
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1953 年 19 巻 217 号 p. 170-172
発行日: 1953/04/05
公開日: 2009/06/30
ジャーナル フリーPDF形式でダウンロード (608K)
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