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34 巻, 404 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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加藤 顕剛1968 年 34 巻 404 号 p. 575-580
発行日: 1968/09/05
公開日: 2009/06/30
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若島 久男, 黒部 利次, 伊藤 憲道1968 年 34 巻 404 号 p. 581-585
発行日: 1968/09/05
公開日: 2009/06/30
ジャーナル フリーA moiré method is described for measuring partial slope contours of flat surfaces of transparent plates. A reference grating is projected by means of a collimated light beam on the surface of a specimen. The light beam passing through the specimen forms a distorted image of the reference grating on the surface of an identical grating, and produces moiré fringes which yield partial slope contours of the specimen.
A formula for obtaining the slope contour from the inclination and the spacing of the moiré fringe is introduced theoretically. Experiments made with a straight line grating of 0.025 mm spacing show that this method has nearly the same precision as the optical interference method.
In this paper few applications are shown. As an example, the slope contours are calculated from moiré pattern produced by an acrylyte plate which is supported at both ends and loaded at mid point. And also a moiré pattern produced by the fractured surface of acrylyte plate is shown.
The method described in this paper is applicable for the transparent materials, but for the reflecting materials their slope contours are derived by the somewhat different moiré technique.抄録全体を表示PDF形式でダウンロード (4546K) -
摩耗における酸化・還元剤の役割 (続報)水野 万亀雄1968 年 34 巻 404 号 p. 586-592
発行日: 1968/09/05
公開日: 2010/02/16
ジャーナル フリーThis report is concerned with basic wear experiments for zinc, antimony and aluminium against a glass disk carried on under unlubricated condition, and under various lubricated conditions, using distilled water, 15% hydrogen peroxide and 2% hydroquinone. These wear phenomena have been studied quantitatively on the amount of wear, the coefficient of friction and the surface roughness of the glass disk. As a result, it is found that the mechanical properties, especially the hardness of the oxide of wear particles, plays a major role in the wear rate at steady state. The results obtained from these expreriments are summarized as follows. 1) With a soft metal, the more easily the metal is oxidized and the harder the oxide of wear particle is, then the higher wear rate results in. 2) Under unlubricated condition, the wear rates for gold, silver, copper, antimony, aluminium, except zinc are lower or the same, and the coefficients of friction are somewhat higher, as compared with that of the lubricated conditions. 3) In the case of lubrication with hydrogen peroxide, the wear rates for gold, silver, copper, zinc, aluminium, except antimony are the highest of those in another lubricated conditions; especially, the wear rate of aluminium is maximum between six metals. 4) The wear behaviors of zinc and antimony can be explained from the fact that these metals have poor ductility in character, and also the oxide of antimony has lower hardness than pure metal. Finally, it is concluded that these wear are due to lapping or abrasion by the oxides of wear particles.抄録全体を表示PDF形式でダウンロード (1124K) -
内山 弘, 石川 二郎1968 年 34 巻 404 号 p. 593-599
発行日: 1968/09/05
公開日: 2009/06/30
ジャーナル フリーThe angular position error of mating gear is tested by means of the single flank gear meshing tester.
However, it is passably difficult to apply this tester to a fine pitch gear and a worm gear.
Therefore, new measuring method of angular position error of these gears using Gear type condenser, Involute helicoid master worm and two change gears is developed and the measuring apparatus based, on this method is assembled. In this apparatus, the work gear and the gear type condenser are attach-ed on the same mandrel, the master worm mating the work gear is rotated by the handle through the change gears. One of the change gears has the same number of teeth as the gear type condenser and the other has the same number of teeth as the work gear. The number of measuring point is equal to the number of teeth of t he gear type condenser.
If necessary, the measuring points are increased in number by the regular displacement of the position of gear type condenser.
Furthermore, if the work worm is attached instead of the master worm, the angular posit ion error of worm gears is also tested.
Several of hobbed gears and worm gears are tested by this measuring apparatus and the angular position error of these gears are obtained in detail from the results.抄録全体を表示PDF形式でダウンロード (4301K) -
長周期ねじり受振器の研究 (第2報)古川 英一, 村奈嘉 与一1968 年 34 巻 404 号 p. 600-605
発行日: 1968/09/05
公開日: 2009/06/30
ジャーナル フリーA taut-wire suspension of seismic rotor of torsional pickup was discussed in the first report. For the measurement of transmission error of small and medium gears an electrodynamic torsional pickup using the taut-wire suspension has been designed with the following characteristics : size 66φ×98mm; weight 0.8kg; natural frequency 1 c/s; fraction of critical damping 0.65; unbalance of seismic rotor ±20 sec of arc; and minimum measuraibe angle ±0.1sec of arc and over-all sensitivity 3.4mm/sec of arc for the lowest working frequency of 1.8 c/s (-10%), respectively. Design details of the newly developed pickup, including the construction of pickup, the associated integrating amplifier, and the unbalance of seismic rotor, are described. An electrodynamic torsional vibration generator which is specially designed for the calibration of the pickup, together with a mechanical magnifying mechanism to read out the amplitude of generator with an accuracy of 0.1sec of arc, are briefly outlined.抄録全体を表示PDF形式でダウンロード (838K) -
須藤 徹也1968 年 34 巻 404 号 p. 606-611
発行日: 1968/09/05
公開日: 2009/06/30
ジャーナル フリー研削により砥石作業面に生じる切れ刃の摩耗を光電的に検出し, 電気的に処理して摩耗切れ刃の数や間隔などを短時間に測定できる装置を試作した.本研究でえられた個々の点については次のようにまとめられる.
(1) 測定速度, スリット長さが装置に固有な時定数との関係で適切であれば, 切れ刃から得られる光電出力波形のピーク電位がその切れ刃の摩耗面長さの一義的な関数として決まり, 実用上の範囲では両者は比例関係にあるとしてよい.
(2) 光電波形のピーク電位を, 切れ刃摩耗面積の関数として, 電気的に定量測定する方法を採り入れたことにより測定を高速化することができた.そのために, インプロセス測定が可能となった.また切れ刃の大きさについての分布が簡単に求められるようになった.
(3) 高速度鋼を研削したGC砥石の作業面を本装置を使って解析し, 目直しの影響として, 初期切れ刃数のみでなく, 砥石表層部のぜい弱化を考えることの重要性が明らかになった.抄録全体を表示PDF形式でダウンロード (4335K) -
井田 一郎, 新井 湧三, 福田 満利, 稲盛 和夫, 杉浦 正敏1968 年 34 巻 404 号 p. 612-620
発行日: 1968/09/05
公開日: 2009/06/30
ジャーナル フリーThis paper deals with diamond grinding characteristics such as grinding force, grinding efficiency and ground surface for steatite, forsterite, alumina and mullite when changing firing temperatures, and for three kinds of alumina having different contents. The principal results obtained are as follows :
(1) Accompanying with the increase in alumina content, bending strength and hardness become higher with the decrease in pore sizes and porosity. (2) The firing temperature influences upon grinding characteristics, especially markedly in the case of grinding with a fine grained diamond wheel. (3) Though wet grinding has little effect on steatite and forsterite, it gives desirable effect on alumina and mullite. (4) Roughness on wet-ground surface is almost governed by the distribution of heights in cutting edges of abrasive grains, and it has a value of about 6μ for No. 100, 3μ for No. 320 and 1μ for No. 600 grain size, respectively. Consequently, alumina 92 or 98 having uniform and minute crystals are suitable for machining fine shapes on ceramics.抄録全体を表示PDF形式でダウンロード (13540K) -
並河 昭, 比屋根 正雄1968 年 34 巻 404 号 p. 621-629
発行日: 1968/09/05
公開日: 2009/06/30
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中村 常郎1968 年 34 巻 404 号 p. 630-636
発行日: 1968/09/05
公開日: 2010/02/16
ジャーナル フリーPDF形式でダウンロード (7846K)
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