巻号一覧
後続誌
44 巻, 525 号
選択された号の論文の17件中1～17を表示しています
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固体潤滑剤を充てんした微粒ダイヤモンドレジノイドボンド砥石の摩耗三宅 正二郎, 鶴田 兼吉, 渡辺 純二, 上野 嘉之1978 年 44 巻 525 号 p. 1050-1056
発行日: 1978/09/05
公開日: 2009/06/30
ジャーナル フリーWheel wear experiments have been carried out in Mn-Zn ferrite grinding by using the wheels which are composed of 6-12μm diamond abrasives, polyoxybenzoyl, thermosetting polyimide and solid lubricant filler. The wheel wear is characterized by a specific grinding wheel wear at a small stock removal rates and by a grinding condition in which rapid increase of wheel wear arises. These characteristics are related to binding force of the bond to abrasives and fillers, and to the thermal resin softening which is caused by the frictional heating. The most excellent wheel, which contains 10 wt% WS2 particles of 0.1μm size, shows 3000 in grinding ratio. Effects of the solid lubricant fillers are concluded as increasing in permissible removal rate, reducing the wheel wear and its periodic change through grinding, and improving surface roughness of the work.抄録全体を表示PDF形式でダウンロード (948K) -
本多 良辰1978 年 44 巻 525 号 p. 1057-1063
発行日: 1978/09/05
公開日: 2009/06/30
ジャーナル フリーWhen a groove is produced on the surface of the metal with a grain edge, the side regions of the groove swell out due to plastic deformation, and the groove depth becomes smaller than grain cutting depth due to elastic recovery. In this paper, the influence is discussed of such elastic and plastic deformation at the tracks of the grains on the formation of surface roughness in the grinding process. Firstly, the experiments are performed of the grinding with single cutting point of the conical diamond for various kinds of metals, in order to determine the ratio of swell-out hight ηs and the ratio of elastic recovery ηr of the grinding grooves, and then, the relation of these parameters to ground surface roughness is investigated analytically and experimentally. As a result, it is found that the relationship between the parameters ηs, ηr, actual ground surface roughness Rsr and theoretical ground surface roughness Rgeom can be expressed by the following equation.
Rsr= {1+0.23 (ηs-ηr)} Rgeom抄録全体を表示PDF形式でダウンロード (1398K) -
遊離砥粒による平行平面加工 (第3報)河西 敏雄, 野田 寿一1978 年 44 巻 525 号 p. 1064-1070
発行日: 1978/09/05
公開日: 2009/06/30
ジャーナル フリーEccentrically distributed loading for the improvement of parallelism in lapping and polishing is proposed. The typical additional weights used for a circular plate work are made by cutting a column at an angle. The centers of gravity of these are at one quarter of the distance from their geometrical center to the foot of the maximum height. Therefore, it is unnecessary to calculate the loading position taking into account the weights of the work and the eccentric load, contrary to a conventional concentrated loading. In lapping, three kinds of eccentrically distributed weights were used, and the deterioration and the improvement of parallelism were repeated by replacing their maximum height positions in 180° direction at 5minutes intervals. This procedure is found to be simpler and more reproducible. In polishing, parallelism was improved better than 1 second without any deterioration of flatness as polishing advances. Moreover, the parallelism of the individual small bits of work fixed on a plate jig using two kinds of waxing methods were compared after lapping and polishing.抄録全体を表示PDF形式でダウンロード (1486K) -
基本的手法の確立三好 由記博, 中沢 弘1978 年 44 巻 525 号 p. 1071-1077
発行日: 1978/09/05
公開日: 2009/06/30
ジャーナル フリーThis paper deals with the foundational method of forecasting chatter stability limits with acceleration signals in cutting process by applying time series analysis and forecasting theory. In this study machine tools and cutting process are considered as a black-box and consequently all the factors concerned with chatter are included in the analysis, hence the method proposed in this study is very actual and practical for forecasting chatter stability limits. Firstly it is verified theoretically that chatter stability limits can be predicted from the trend of the acceleration amplitude and next taking variance of sampled data zt is shown to be effective as a method of converting trends of amplitude to those of average level. After the estimation of the time series models for the preprocessed series using the FPE method and Yule-Walker's equation, future values are forecasted precisely by means of the models estimated. As for the prediction of the onset of chatter vibration, three methods of model estimation for each cutting speed and forecast origin viz. (1) using common model, (2) using the same set of model order (p, d) and estimating autoregressive parameters, (3) estimating the new suitable model, are investigated and the three methods are all shown to be capable of forecasting practical limit conditions of chatter applying the acceleration level on the onset of chatter vibration at a cutting speed.抄録全体を表示PDF形式でダウンロード (1292K) -
縞間隔を利用した測定法伊藤 紀男, 加藤 正1978 年 44 巻 525 号 p. 1078-1084
発行日: 1978/09/05
公開日: 2009/06/30
ジャーナル フリー本研究ではレーザ光の可干渉性を利用して,くさび状をなす開口と物体の角度を,その後方にできるFraun-hofer回折像の縞間隔が角度によって変化するという点に着目して測定する一つの方法を提案した。そして本測定法の特徴から比較的小さく,しかも厚みの無視できるような試料によって実験を試み,その結果と主として従来からの方法である投影器による測定値との比較を行った。さらに本測定法の問題点や縞次数との関係についても検討を加え,次のようなことが明らかにされた.
(1) くさび状をした開口によっても物体によっても,そのFraunhofer回折像は双曲線群となることを示し,実験によっでそれを確認した.
(2) 回折像を利用した角度測定法としての原理的な特長が明らかにされた.
(3) この方法では入射光に対する試料のわずかな非垂直性はほとんど無視できる.
(4) 測定精度を高めるためには,縞間隔の測定誤差をできるだけ小さくすることである.
(5) 今回の測定例の結果からは投影器測定値と2%以内で一致しているが,次数との顕著な関係は現れなかった.抄録全体を表示PDF形式でダウンロード (1457K) -
せん断ピッチおよびすべり量の解析上田 昇, 松尾 哲夫1978 年 44 巻 525 号 p. 1085-1091
発行日: 1978/09/05
公開日: 2010/02/16
ジャーナル フリー以上の研究から次のようなことがわかった.
(1) SUS304の切削では切削速度V=50～100m/min以上,マルエージング鋼ではV=10～50m/min以上,チタンおよびチタン合金では実験した全切削速度域(V=0.1～500m/min)において切りくずは鋸歯型になる.
(2) 鋸歯型切りくずにおけるせん断ピッチ,すべり量は共に切込み程度の値で,マルエージング鋼,チタン合金,チタンそしてSUS304の順に大きく,SUS304のせん断ピッチ,すべり量は共にマルエージング鋼の約4倍である.
(3) せん断ピツチと切削速度の関係におけるすくい角の影響は一般に小さく,特にSUS304では影響はほとんどない.これに対し,すべり量と切削速度の関係はすくい角の影響を大きく受け,すくい角が小さいほどすべり量は大きく,特にチタンでは切削速度の大きいところでその影響は大きい.
(4) せん断ピッチは切込みの増加と共にほぼ比例的に増大する.このことは理論 (3.4節) ともよく一致する.切込みが高くなるにつれ,せん断ピッチは切削速度の上昇に伴い,SUS 304では減少の傾向が著しく,チタンでは増加傾向を示す.切込みによ'るすべり量の変化もせん断ピッチと同じ傾向の変化を示す.
(5) 鋸歯型切りくずのせん断ひずみは,SUS304のα=6°, t=0.1mm, V=100m/min以上で1.5～2.8,チタンではV=0.1～500m/minで1～2の間である.また,切込みが大きくなるとせん断ひずみは,SUS 304では減少するが,チタンでは変わらない.
(6) 鋸歯型切りくずはせん断型切りくずと同様に,被削材変形がある限界せん断ひずみに達した時に生ずるが,せん断型切りくずに比べ限界せん断ひずみ値がかなり大きく,また刃先の引張りき裂を主原因とする不連続なせん断型切りくずとは異なる.抄録全体を表示PDF形式でダウンロード (1536K) -
数値制御工作機械による加工精度に関する研究 (第2報)藤井 義也, 岩部 洋育1978 年 44 巻 525 号 p. 1092-1098
発行日: 1978/09/05
公開日: 2009/06/30
ジャーナル フリーThis paper deals with the influence of the dwell function of a controller on profile error of contouring. The results are as follows.
(1) Using intermittently the dwell function, the dwell time longer than 0. 04 sec is controllable in our controller.
(2) For the improvement of accuracy, the dwell function is applicable in down millingwith a positive dimensional error.
(3) The means of dimensional error and shape error decrease by using the dwell function.Errors present in the same manner of the transient phenomenon and reach to a steady state above one second under the experimental conditions. Longer than one-second-dwell makes the machining time increase.
(4) The effect of the dwell on the accuracy of contouring is verified in machining a circular contour. Using intermittently the dwell function is applicable to improve profile error.抄録全体を表示PDF形式でダウンロード (1330K) -
喜田 義宏, 井戸 守, 川崎 直通1978 年 44 巻 525 号 p. 1099-1104
発行日: 1978/09/05
公開日: 2009/06/30
ジャーナル フリーIn this paper, experimental results in low speed machining on lead with a wide range ofnegative rake angle of a tool (0--75deg.) are presented. During cutting, the deformation process of grid lines on the side of a test-piece was observed through the side glass restricting the side-flow of the material in order to clarify the behavior of the material and also, cutting force was measured by strain wire gage. Then, the behavior of the material ahead of the tool face was discussed from the point of view of friction between tool and material, and of the flow line of the material ahead of the tool face. And, the stress analysis of the material ahead of the tool face was conducted by the deformation study of the grid.抄録全体を表示PDF形式でダウンロード (1129K) -
安永 暢男, 小原 明, 樽見 昇, 今中 治1978 年 44 巻 525 号 p. 1105-1110
発行日: 1978/09/05
公開日: 2009/06/30
ジャーナル フリーThis paper describes experimental results for polishing Si single crystals by means of “mechanochemical polishing method with soft powders”. In this method the powders used are softer than the work materials and react chemically with them. It is shownthat high precision polishing of Si single crystals is materialized by utilizing the solid state reaction between the powder and the oxide layer formed on the Si surface. The followingare the main results obtained.
(1) A mirror surface free from mechanical damages is easily produced by polishing with soft powders such as BaCO3 and Fe3O4. High polishing rates are obtainable especially in dry processing.
(2) Polishing by a relatively rigid polisher e. g. bakelite brings a polished surface of high flatness.
(3) The oxidized and worked layer remaining on the surface polished by BaCO3 powder is much thinner than by conventional mechanical polishing.抄録全体を表示PDF形式でダウンロード (2074K) -
工具の挙動と加工穴の形状佐久間 敬三, 田口 紘一, 甲木 昭雄1978 年 44 巻 525 号 p. 1111-1116
発行日: 1978/09/05
公開日: 2009/06/30
ジャーナル フリーThe effects of tool vibration on hole-profile in deep drilling are examined by analysis of vibration with respect to frequency. Further, the mechanism and the causes of formation of multi-corner shape in holes with high length-to-diameter ratio are discussed. It is concluded that the frequency of the bending vibration of the boring bar during machining of the holes corresponds to the number of the corners of holes. From the fact that pentagonal shaped holes are produced frequently, the BTA system solid boring tool is supposed to behave like the equally spaced four-cutting edge tool. This behavior is clarified through measuring the movements of the axis of boring bar. The forming of multi-corner shaped holeitself may be due to one kind of self-excited vibration which is induced by the vibratory movements of the tool axis. Its movements occur at a rate of Z times per one revolution of a workpiece in boring by the tool with Z cutting edges, because of the unbalance of cutting forces. Multi-corner shaped hole tends to be oversized and the number of multi-corner become less as the hole is deeply machined.抄録全体を表示PDF形式でダウンロード (1043K) -
長松 昭男, 道村 晴一, 石原 章1978 年 44 巻 525 号 p. 1117-1122
発行日: 1978/09/05
公開日: 2010/02/16
ジャーナル フリー著者らが先に提案した縮小インピーダンス合成法を用いて, 機械構造物の振動を計算するプログラムを作成した.これをシリンダブロックの二つの部分に適用して計算したところ, 固有振動数は打撃試験の結果と約1割の誤差範囲で一致し, 一方固有モードはボログラム振動試験結果とよく一致した.この結果, 本プログラムは回転機械のケーシングの振動特性を設計段階で予知するのに十分有用であることが判明した.抄録全体を表示PDF形式でダウンロード (1476K) -
久米 靖文, 橋本 文雄1978 年 44 巻 525 号 p. 1123-1128
発行日: 1978/09/05
公開日: 2009/06/30
ジャーナル フリーThis paper is concerned with the determination of the damping occurring at the contact surfaces where machine elements are joined each other by a press fit. When a plate is held between two spheres by means of a constant clamping pressure and is then subjected to a cyclic twisting moment parallel to the flat plate, energy is dissipated at the contact surfaces. The contact area is divided into a region of slip and locked region of no slip. In the present solution, it is assumed that the tangential component of traction at the area over which slip has progressed, is equal to the product of a constant friction coefficient by the normal pressure on the contact surfaces. The relationship between slip damping and twisting angle, between slip damping and stick ratio may be found by this analysis. The results of the analysis are correlated with experimental data.抄録全体を表示PDF形式でダウンロード (1109K) -
切りくず処理に関する研究中山 一雄, 新井 実1978 年 44 巻 525 号 p. 1129-1135
発行日: 1978/09/05
公開日: 2009/06/30
ジャーナル フリーThe breakability of chip is one of the important factors for the evaluation of the machinability of steel. For the quantitative evaluation of the breakability, a simple method to get the ultimate strain in the bending of chip with the help of I. T. V. and V. T. R. is shown to be useful. By this method, following results are obtained on the breakability of steel chip :
(1) In the practical range of cutting conditions with carbide tool, the ultimate strain of chip is varied only a little by cutting speed and feed.
(2) Cracks on the chip surface increase the breakability remarkably.
(3) Free machining steels produce chip with high breakability.
(4) Steel chip looses its breakability at a critical temperature. Very fortunately, however, the chip temperatures under usual cutting conditions are a little lower than the critical temperature.抄録全体を表示PDF形式でダウンロード (1248K) -
直線歯形内歯車とかみあう小歯車の近似歯形石川 雄一, 石川 二郎1978 年 44 巻 525 号 p. 1136-1141
発行日: 1978/09/05
公開日: 2009/06/30
ジャーナル フリーThe advantages of an internal gearing may be summarized briefly : 1. The gearing is compact. 2. The tooth surface is highly durable. With such advantages on one hand, the internal gearing has limitations on the other hand. The biggest difficulty is cutting and grinding the internal gear teeth accurately. Accordingly, it is the purpose of this study to produce a pair of tooth profiles which are easily and accurately machined and which engage with an allowable transmission error. In this gearing, the teeth of the internal gear are made with straight line profiles, and the teeth of the mating pinion are made with various kinds of profiles approximating theoretical ones. These tooth profiles can be machined by standard machine tools. In this report, six kinds of approximate tooth profiles of mating pinion are examined. The deviation between the approximate and theoretical profiles is calculated and compared with each other. By this comparison, it is made clear that in the six kinds of tooth profiles, the circular arc which is obtained by the least squares method, has the least deviation of all and holds a fairly good approkimation under various specifications of gearing. And it is recognized that a designer needs to choose the most suitable value of inclination angle of an internal gear, taking the effective tooth depth and the deviation of approximation into consideration.抄録全体を表示PDF形式でダウンロード (1029K) -
繰返し圧延と旋回圧延中田 孝1978 年 44 巻 525 号 p. 1142-1148
発行日: 1978/09/05
公開日: 2009/06/30
ジャーナル フリーPDF形式でダウンロード (1196K) -
石川 二郎1978 年 44 巻 525 号 p. 1149-1156
発行日: 1978/09/05
公開日: 2009/06/30
ジャーナル フリーPDF形式でダウンロード (1535K) -
木下 夏夫1978 年 44 巻 525 号 p. 1157-1162
発行日: 1978/09/05
公開日: 2010/05/07
ジャーナル フリーPDF形式でダウンロード (1374K)
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