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30 巻, 350 号
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鹿取 一男1964 年 30 巻 350 号 p. 233-238
発行日: 1964/03/05
公開日: 2009/10/08
ジャーナル フリーPDF形式でダウンロード (9464K) -
切削作業標準設定に関する研究 (第8報)竹山 秀彦, 糟谷 梅太郎, 野池 一広1964 年 30 巻 350 号 p. 239-245
発行日: 1964/03/05
公開日: 2009/10/08
ジャーナル フリーIt has not been assured yet whether free cutting steels are advantageous or not for turning operations at rather high cutting speeds with carbide tools. This report is to clarify the aforementioned problem and to establish the turning standard with carbides from the standpoint of tool life.
According to the test results, the leaded free cutting steel can be turned at the speeds about forty percent higher than the case of the corresponding normal steel, if only the carbide grade is properly selected.抄録全体を表示PDF形式でダウンロード (5615K) -
点算法による砥粒分布密度の測定, およびドレッシング条件の影響鈴木 憲二, 高橋 邦夫1964 年 30 巻 350 号 p. 246-252
発行日: 1964/03/05
公開日: 2009/10/08
ジャーナル フリーGenerally, in order to determine the number of grains per unit area and the mean distance between grains on surface of grinding wheel, transcription method and reflecting method are used.
By these methods, however, it is difficult to estimate them accurately.
Therefore, point counting method was adopted it the present investigation.
Putting the lattice board on the transcripted figures, and taking a count of the number of grains on the lattice point, we can calculate the ratio of grain area to the total area of wheel surface (s).
From this ratio, showing in following equation, we can calculate the number of grains per unit area (ρ) and the mean distance between grains (l).
ρ=1.91s/do2, l=0.723do√s
where
do : original grains diameter.
This method is applied to an experiments which is made to determine the effect of dressing condition on grinding wheel.抄録全体を表示PDF形式でダウンロード (4173K) -
研削抵抗について田中 義信, 津和 秀夫, 矢野 章成1964 年 30 巻 350 号 p. 253-258
発行日: 1964/03/05
公開日: 2009/10/08
ジャーナル フリーAs has been previously mentioned in 1st report, the mechanism of fine finishing by an ultrasonically vibrated abrasive stone is, except its complexity, similar to the mechanism of superfinishing.
In this paper, the mechanism of this finishing is investigated through the measurement of the resistace T (Θ) along the rotational direction by the use of a wire-strain-gauge dynamometer and the measurement of the resistance T along the finishing direction calculated by the resistanceT (Θ).
The results are as follows :
(1) The mechanism of finishing is better understood by the measurement of the resistance T along the finishing direction than by the measurement of the resistance T (Θ) along the rotational direction.
(2) In the most suitable condition, the resistances T (Θ) in both cases are found to be much the same. The resistance T of ultrasonic finishing, however, is larger than that of the superfinishing because the angle of the finishing direction of the former remains larger than the latter for different conditions.
(3) For the same rate of stock removal, the value of the finishing resistance by the ultrasonic finishing is only a half or a quarter of the value by the superfinishing.抄録全体を表示PDF形式でダウンロード (3203K) -
放電電力について筒井 忠夫1964 年 30 巻 350 号 p. 259-265
発行日: 1964/03/05
公開日: 2009/10/08
ジャーナル フリーThe power in the electric-discharge grinding (R-C circuit) was studied theoretically and experimentally under various electrical conditions. The results were as follows :
(1) In case of repeating electric-discharge, the maximum power was, both theoretically and experimentally, proportional to the square of the source voltage, but inversely proportional to the charging resistance, and irrelevant to the capacity of the condenser.
(2) When observing the wave forms of the condenser voltage, it was found that the smaller was the resistance or the capacity, the shorter became a period of the repeating electric-discharge.
(3) The relation between the mean power and the mean charging-current was experimentally investigated and could also be theoretically explained.
(4) The metal-removal rate was proportional to the maximum power and increased when the capacity became larger.抄録全体を表示PDF形式でダウンロード (4715K) -
グリーソン社の零番カッタだけを用いて近藤 誠造1964 年 30 巻 350 号 p. 266-272
発行日: 1964/03/05
公開日: 2010/01/27
ジャーナル フリーHypoid gears have the unsymmetrical tooth profile. Therefore, it either needs a cutter to cut the hypoid gears which has unsymmetrical blades or it must tilt the cutter shaft as much as the amount of unsymmetry. But, if the hypoid gears can be finished by the Gleason's No. 0 cutter that has symmetrical blades, it is very convenient and advantageous.
In this study, it says that the gear is cut with Formate method by the No. 0 cutter and non-tilting of the cutter shaft, and the pinion is generated by the No. 0 cutter to mesh with this gear.抄録全体を表示PDF形式でダウンロード (1175K) -
通常構成刃先と拘束工具の構成刃先について臼井 英治, 星 光一1964 年 30 巻 350 号 p. 273-284
発行日: 1964/03/05
公開日: 2009/10/08
ジャーナル フリーIn the previous papers, it was reported that the plastic flow ahead of the restricted tool-chip contact length of cut-away tools is produced through a slip-line field which involves a centered fan.
The plastic flow peculiar to the tools bears a great resemblance to the curved layer structure of built-up edge and the plastic flow within the chip ahead of the built-up edge nose, which are usually observed on etched specimen under microscope. In addition, the plastic flow itself turns to the stable built-up edge under some conditions.
This paper stresses the importance of the plastic flow due to the centered fan of slip lines for more rational understandings of the nature of built-up edge. In this connection, the formation and the growth of the natural built-up edge as well as the built-up edge produced by cut-away tools are critically re-examined.抄録全体を表示PDF形式でダウンロード (17308K) -
圧力角誤差石川 二郎, 富井 正男1964 年 30 巻 350 号 p. 285-293
発行日: 1964/03/05
公開日: 2009/10/08
ジャーナル フリーThough the two-flank gear roll test has been used widely in the field of gear inspection, the relation between the recorded data and the individual errors is still not clear.
The authors wish to clarify the problem.
The paper presents a theoretical treatment on the relation between the fluctuation of center distance of a pair of spur gears under testing and the errors of pressure angle. It is assumed that any other errors except pressure angle do not exist in the gear. And the following results are found.
(1) The fluctuation of center distance, which is recorded on a chart, varies with the combination of the relative pressure angle errors of the mating tooth profiles, for instance, when one of the relative pressure angle error is negative and the other is positive, the shape of the recorded data becomes a saw tooth wave, and when the relative pressure angle errors are both negative or positive, the shape of fluctuation becomes rectangular wave.
(2) In order to know the absolute value of the error, we have to check the high spot region of the mating profiles with minum or to use a master gear with a little smaller pressure angle from the correct value in the testing.抄録全体を表示PDF形式でダウンロード (1450K) -
1964 年 30 巻 350 号 p. 294-295
発行日: 1964/03/05
公開日: 2009/10/08
ジャーナル フリーPDF形式でダウンロード (409K)
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