巻号一覧
19 巻 (1950)
- 12 号 p. 238-
- 10-11 号 p. 203-
- 8-9 号 p. 164-
- 6-7 号 p. 122-
- 4-5 号 p. 90-
- 3 号 p. 40-
- 1-2 号 p. 2-
19 巻, 10-11 号
選択された号の論文の6件中1～6を表示しています
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杉原 栄次郎, 小沢 正義, 星野 廸男1950 年 19 巻 10-11 号 p. 203-208
発行日: 1950年
公開日: 2009/06/12
ジャーナル フリーThere has recently been developed in America an electronic instrument for measuring the eccentricity of the core wire of covered arc-welding electrodes, but in Japan we have yet no such development, mechanical measurement by means of a micrometer being a general practice.
We have made it possible to measure the eccentricity electrically by the application of the magnetic field. Our instrument has the important advantages that the readings can be obtained directly or by a dial indicator and its accuracy is not affected by the thickness of the welding electrode. The covered electrode is introduced into the magnetic field of an L- type coil, where inductance varies by rotating and translating the electrode, and induces the change of voltage or current in the circuit.
Thus, if the proper indicator, for example, microammeter is arranged through zero-method, it indicates the eccentricity of the electrode under test. The sensibility is 9/1000mm/0.5μA, the errors being less than a few percentages.抄録全体を表示PDF形式でダウンロード (3637K) -
壱岐 武彦, 児子 茂1950 年 19 巻 10-11 号 p. 209-213
発行日: 1950年
公開日: 2009/06/12
ジャーナル フリーThe writers designed a powder dispenser and a blowpipe for the powder-cutting method, and carried out studies on the cutting velocity of cast iron and on flux powder (iron powder) to be used in this method, for the purpose of riser removal. This report gives the results of investigations on the cutting velocity of cast iron and on the influences of the carbon content, grain size and injected quantity of iron powder on the cutting efficiency.抄録全体を表示PDF形式でダウンロード (5783K) -
不安定大洲田組織を含む鋼を心線とする被覆棒をもつて,強靭鋼を熔接する場合の熔着鋼の硬度に及ぼす被覆剤中の黄血塩の影響について関口 春治郎, 齊藤 司1950 年 19 巻 10-11 号 p. 214-221
発行日: 1950年
公開日: 2009/12/10
ジャーナル フリーIn this research, the authors made many kinds of arc-welding electrode by applying coating-materials containing or not containing potassium ferocYanide on core-rods made of Ni-Cr stainless steel or Mn-Cr steel which consisted of an unstable austenitic structure or a ferritic and martensitic structure. Using these electrodes, they welded a V-shaped groove between two plates made of Mn-Cr-Mo alloy steel, and measured the hardnesses of the weld metals, and made chemical analysis of them. In this way, the following results were obtaind.
(1) When a V-shaped butt joint of alloy steel was welded with electrodes having coating which contained potassium ferrocyanide, the weld metal obtained was softer than that obtained with electrodes which had the coating containing the same constituents excepting potassium ferrocyanide.
(2) Such a tendency was remerkable in the first layer of the V-shaped butt joint. And the authors considered these phenomena as follows :
When there is potassium ferrocyanide in the coating of an electrode, the atmosphere of CN gas is produced in the vicinity of the electric arc at the end of the electrode by decomposition of K4Fe(CN)6, and gas thus produced excludes the air from the surrounding place of the arc.
Consequently at the time of deposition by electric arc, the degree of decrease of easily oxidizable special elements such as Mn and Cr are insignificant, and nitrogen-content of weld metal is great. As a result of this tendency, the weld metal contains more austenitic structure and the austenitic structure is stabilized by the same tendency. Accordingly the hardness of weld metal decreases.
But when the content of potassium ferrocyanide in coating is more than 30%, much gas is produced at the time of electric arc-welding and the atmosphere of a workshop becomes bad for health. Therefore, when applying this method, precautionary measures such as opening of the workshop windows, etc. must be taken for the maintenance of healthy conditions for the workers.抄録全体を表示PDF形式でダウンロード (702K) -
川原子 了三, 佐藤 加賀生, 石田 静雄1950 年 19 巻 10-11 号 p. 221-223
発行日: 1950年
公開日: 2009/06/12
ジャーナル フリーThe practical use of the automatic welding method (union melt process) for the car constructions has been anticipated for several years, yet it has not met with much success owing to the various kinds of difficulties.
After carrying out the preliminary experiments carefully in our shop, we succeeded in the application of this process for the center sill of a freight car.
The machine and the material used are as follows :
1. The welding machine was of a thyratron controlled type and was built by ourselves.
2. The welding flux was prepared according to the result of the preliminary experiments.
3. The welding wire was a kind of "Sekiguchi Electrode Wire" which was chosen due to the special requirements on the quality of the electrode for this process.
4. The parent metal was of quality suiting the specifications.
Based on the results of tests, the author's conclusions are as follows :
1. The microscopic investigations and the physical properties of this process can safely be extended to the whole construction of cars, if the parent metal is of reliable quality.
2. The welding speed can be made faster if the welding current is increased a little more.
3. The bead shall be straightened if the vibration of the welding head of the machine is eliminated and if a reel of electrode is used.抄録全体を表示PDF形式でダウンロード (4216K) -
佐々木 新太郎1950 年 19 巻 10-11 号 p. 224-226
発行日: 1950年
公開日: 2009/06/12
ジャーナル フリーPDF形式でダウンロード (333K) -
沢井 善三郎1950 年 19 巻 10-11 号 p. 227-229
発行日: 1950年
公開日: 2009/06/12
ジャーナル フリーPDF形式でダウンロード (270K)
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