巻号一覧
後続誌
26 巻, 305 号
選択された号の論文の10件中1～10を表示しています
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荒木 鶴雄1960 年 26 巻 305 号 p. 307-311
発行日: 1960/06/05
公開日: 2009/06/30
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レース輪郭および工具輪郭村瀬 善三郎1960 年 26 巻 305 号 p. 312-317
発行日: 1960/06/05
公開日: 2009/06/30
ジャーナル フリーIt has been known for long to insert a number of balls between the hericoidal surfaces of a screw and a nut for reducing the friction in their relative motion and increase the operating efficiency of the screw feeding. The machine element applied above idea has been called Screw Traversing Ball Bearing, Kugellauf Mutter, Ball Bearing Screw, etc, and we named it "Ball Screw".
I have studied several problems included in the machine element and the trial manufacture of it. In this article I discuss only the mathematical method of determining the ball race profiles and its cutting tool profiles.抄録全体を表示PDF形式でダウンロード (815K) -
第1報 自動定寸による研削角田 馨1960 年 26 巻 305 号 p. 318-322
発行日: 1960/06/05
公開日: 2010/02/16
ジャーナル フリーWhen the work is continuously ground with an automatic internal grinder, there is a tendency of dimensional error occurring according to a specific trend.
The causes for this, in most cases, are attributable to the automatic dressing of grinding wheel and to the mechanism whereon the stop position varies whenever the work head is dressed. Thus, the author interprets that the error occurring from continuous operation is due to the function of the respective relative positions of the centers of the work and the grinding wheel spindle and, also, of the diamond cutting edge.抄録全体を表示PDF形式でダウンロード (854K) -
第2報 自動範測による研削角田 馨1960 年 26 巻 305 号 p. 323-327
発行日: 1960/06/05
公開日: 2009/06/30
ジャーナル フリーIn most cases, grinding of the work with an internal grinder is done auto-gagingly. In this case, correlativity exists between the gage size and the work dimension. The author has drawn up an empirical formula related to the gage pressure on the work and the amount of insert and finishing dimension of the work.
When the amount of gage inserted into the work increases, the finishing dimension of the work will increase and when the pressure is increased, the finishing dimension will decrease. It is also found out that pressure and amount of insert are related with the deviation of finishing dimension.抄録全体を表示PDF形式でダウンロード (669K) -
炭素鋼の超高速切削におけるセラミック工具と超硬工具の切削性能の比較山田 国男, 中山 登, 梶原 弘, 酒井 清介, 三井 寿雄1960 年 26 巻 305 号 p. 328-332
発行日: 1960/06/05
公開日: 2010/02/15
ジャーナル フリーThe present study is concerned with the comparison of the performances between a carbide tool and a ceramic tool in cutting a carbon steel at ultra high speeds.
Work pieces of a carbon steel. S 45 C in JIS, having a hardness of 90 in Hv were cut three-dimentionally at speeds varying from 600 to 1260 m/min with a fixed feed of 0.1 mm/rev throughout. Both tools have the same geometry, -5, -7, 5, 7, 15, 15, 0.5 in their cutting edges.
Various factors such as the maximum width of flank wear, the maximum depth of crater, the surface roughness of work piece, the tool life and so on were taken into consideration in comparing the performances of both tools, and the following conclusions were obtained.
(1) While the carbide tool wore more rapidly with the increment of cutting speed, the apparent behavior of the wear was very near that shown in an ordinary high speed cutting.
(2) The ceramic tool hardly wore, and it withstood particularly well to the cratering of tool. This fact may be attributed to the high temperature hardness of the ceramic tool, a sintered aluminum oxide.
(3) The life of ceramic tool was very much elongated in comparison with that of carbide tool when the cutting speed approached 1000 nil/min.
(4) There was no appreciable difference in the surface qualities of works cut with both tools, and the smoothness was fairly good.抄録全体を表示PDF形式でダウンロード (4184K) -
酒井 高男1960 年 26 巻 305 号 p. 333-336
発行日: 1960/06/05
公開日: 2009/06/30
ジャーナル フリー本論文は支え刄をもつ普通の型のカム秤の研究1)にひきつづいて行つた研究の報告である。
差動カム秤は,支え刄の代りにスティールテープとこれをまきとるローラとをもつている。このように支え刄をもたないために,差動カム秤は支え刀カム秤にくらべて乱暴な取扱いに対する寛容度が大きいものと考えられる。理論的には,差動カムにおいてスティールテープをまきとるローラの直径を零にするとき,支え刄カムがえられる。よつて代用円を用いた差動カムに許されている良由度は,支え刄カムのそれより1つ多いことがわかる。すなわち後者は偏心率および取付角なる2つの自由度をもつだけであるが,差動カムにおいては偏心率,取付角および振子の腕長対ローラの径(以下これを比振子長ということにする)なる3つの自由度をもつ。この特徴のゆえに,差動カム秤の誤差曲線は,支え刄カム秤のそれよりさらに1つだけ多い変曲点をもつことができる。
本論文はこの観点に立つて差動カムの設計方法を論じたものである。理論を展開するに当り,1つの顕著な事実を発見した。すなわち振子の傾斜範囲の中央における傾角を基にして,偏心率と比振子長との問にある函数関係を定めるとき,誤差曲線はこの中央点に対して対称型になる。それゆえ計算を必要とする範囲が半減するばかりでなく,データの整理が簡単になる。本論文において述べる方法が代用円を決定する唯一の方法ではないことは勿論である。しかし振子の傾斜範囲600という比較的に大きな値に対して,±0.00002というよい誤差率がえちれたという事実は,実際上本論文による設計方法で十分であることを示しているように思われる。残された問題は代用円を利用した差動カム秤の主として工作に関する問題である。これについて今回はふれていない。将来必要の生じた場合に取上げることにする。
本研究が秤業者だけでなく,この種の問題を扱う研究者にとり何らかの参考になれば幸いである。抄録全体を表示PDF形式でダウンロード (627K) -
工具加熱による高温切削法の効果(その2)大越 諄, 上原 邦雄1960 年 26 巻 305 号 p. 337-346
発行日: 1960/06/05
公開日: 2009/06/30
ジャーナル フリーIn this paper the effect of hot machining by heating tool on the surface roughness and on the cutting force is examined experimentally using Copper, Carbon-Steel and Manganese Steel as workpieces. The conclusion derived from these experiment and theoretical consideration presented in the 1st report are as follows:
1. The hot machining by heating tool is effective when the interface temperature is raised sufficiently by the heating of tool, and in this case similar effect to the ordinary hot machining is obtainable; i.e., the cutting force decreases and the built-up edge disappears. Moreover, when non dimensional number L (=va/2K) is comparatively large (according the experiment when the L is larger than 0.8) the shear angle φ increases and β decreases.
2. The raising of the interface temperature by heating tool is attained when following conditions are fulfilled: a) Thermal conductivity of workpiece material is small(especially when the L is large) or L is small (especially when the thermal conductivity of workpiece material is large). b) Interface temperature at ordinary (non hot machining) cutting condition is lower than durable temperature of the cutting tool material.
3. With the thermal conductivity of workpiece material the non dimensional number L is a suitable number for discliminating the effect of hot machining by heating tool.抄録全体を表示PDF形式でダウンロード (5445K) -
竹山 秀彦, 糟谷 梅太郎1960 年 26 巻 305 号 p. 347-351
発行日: 1960/06/05
公開日: 2009/06/30
ジャーナル フリーAlthough there have been various explanations or hypotheses on entering process and lubricating behavior of cutting fluids during machining, most of them do not seem to have reached a decisive conclusion yet. In this experiment the behavior of the cutting fluid has been visually analyzed by means of a 16 milimeter movie camera. The important findings are as follows:
(1) Wherever putting a cutting fluid, it enters the tool-chip interface almost in parallel with the cutting edge from both sides of free boundary of the chip on the rake face.
(2) In wet machining there exist the zone where the cutting fluid cannot enter, the area of boundary lubrication, it seems, and the liquid phase of the cutting fluid, in sequence from the cutting edge.
(3) The cutting fluid appreciably reduces the area of metallic contact between tool and chip.
(4) It is advisable to apply a cutting fluid aiming at the rake face, in parallel with the cutting edge from both sides of free boundary of the chip, for the most efficient lubrication of the tool-chip interface.抄録全体を表示PDF形式でダウンロード (7956K) -
大石 清1960 年 26 巻 305 号 p. 352-356
発行日: 1960/06/05
公開日: 2009/06/30
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1960 年 26 巻 305 号 p. 357-359
発行日: 1960/06/05
公開日: 2009/06/30
ジャーナル フリーPDF形式でダウンロード (693K)
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