巻号一覧
後続誌
46 巻, 4 号
選択された号の論文の17件中1～17を表示しています
- |<
- <
- 1
- >
- >|
-
接触面における研削抵抗分布と研削抵抗の特性柴田 順二, 稲崎 一郎, 米津 栄1980 年 46 巻 4 号 p. 395-401
発行日: 1980/04/05
公開日: 2009/06/30
ジャーナル フリーThe concept of the distribution of the grinding force at the area of contact between the grinding wheel and the workpiece was introduced on the assumption that the grinding force is distributed continuously at the area of contact. The integration value of the distribution is equal to the grinding force. Based on the model constructed here, some characteristics of the distribution and the grinding force in high-depth-of-cut grinding were analyzed theoretically and investigated experimentally. It was confirmed that the concept of the distribution of the grinding force is useful in order to analyze some characteristics in high-depth-of-cut grinding. As a result, the following conclusions may be drawn. (1) The distribution in a vertical direction (the Y coordinate) can be assumed ap-proximately in a linear relation to X-distance, and the distribution in a horizontal direction (the X coordinate) is infinitively large at Y= 0, decreasing rapidly with the increasing value of Y to reach a nearly constant value. (2) The distributions in a normal and a tangential direction can be obtained from the distributions in the vertical and the hor-izontal distribution. The distributions in a normal and a tangential direction are both increase linearly along the arc of contact. The directions of the vectors of the distributions have a significant effect on the vertical and the horizontal components of the grinding force.抄録全体を表示PDF形式でダウンロード (1590K) -
大石 進, 古川 勇二, 塩崎 進1980 年 46 巻 4 号 p. 402-409
発行日: 1980/04/05
公開日: 2010/02/16
ジャーナル フリーThis paper aims to clarify the condition under which workpiece burning occurs in creep feed grind-ing and by connecting the result to obtain an optimal grinding condition which can avoid any occurrence of burning. With continuing operation, the grinding wheel becomes dull and workpiece burning takes place when the grinding energy flux φ (grinding energy per unit contact area per unit time) exceeds a critical value of φb. According to the experiment, the value of, was about 7-8 J/mm2·s and was not influenced by the wheel, the grinding manner nor the contact length of wheel and workpiece, but was solely a function of dimen-sionless grain depth of cut hg=- (Vw/Vs) a/D. The φ value increases from an initial φ0 almost linearly with the path length of grain L. Therefore the φb as well as the rate of increase of φ with L must be as small as possible in order to avoid workpiece burning. Taking all the above factors into consid-eration, nomographs to indicate the optimal grind-ing conditions in view of burning are presented.抄録全体を表示PDF形式でダウンロード (1661K) -
太田 信之, 小林 康男, 村山 浩一1980 年 46 巻 4 号 p. 410-415
発行日: 1980/04/05
公開日: 2009/06/30
ジャーナル フリーThis paper deals with the injection velocity of molten metal from the gate of dies in die casting. This injection velocity of molten metal is very important to design the die casting dies, or to make the good die castings. Therefore, the fundamental formula of the injection velocity had theoretically derived from the hydraulic theorem. In order to apply this formula on the design of die casting dies, this formula is necessary to make sure by the experiment. However the injection velocity is very difficult to be directly measured by the experiment. On that reason, the velocity meter of the die casting plunger which is easy to be handled and accurate to measure is developed in this research. The injection velocity is obtained from the plunger velocity multiplied the ratio of the sectional area of the casting plunger to the gate area. In this experiment, the plunger velocity is measured on the various cases of die casting. The injection velocity obtained from the velocity meter is well agreed with the velocity calculated by above formula. Therefore in the design of dies, it is able to calculate accurately the injection velocity of molten metal by means of the fundamental formula.抄録全体を表示PDF形式でダウンロード (1190K) -
断面曲線の確率過程モデル長谷川 素由1980 年 46 巻 4 号 p. 416-422
発行日: 1980/04/05
公開日: 2009/06/30
ジャーナル フリーThe ground surface profile may be interpreted as the output from a stochastic linear system with an input white noise. To characterize the stationary stochastic process of the ground surface, the profiles are analyzed by the procedure of FPE method from the discrete sampled data of five profiles which were measured on the direction of the cross direction, 0°, the grinding direction, θ=90°, and midways direction, θ=30°, θ=45°, θ=60°, respec-tively. The average order of the uniformly sam-pled autoregressive model obtained by the FPE method of time series techniques is nearly 20, but it is very sensitive, therefore, it is not so good to describe the characteristics of the ground surface roughness as an independent variable. The para-meter of the autoregressive model depends upon the direction of measurement, so that there is a direction to make an autoregressive parameter maximum or minimum. Further, from comparison of autoregressive parameters with the order of the model and its spectral analyses, the adequate model for the ground surface profiles under consideration is represented by the autoregressive model of order 4, denoted by AR (4). The ground surface characteristics given by this model AR (4) is aniso-tropic and its roughness decreases gradually from the cross direction to the grinding direction.抄録全体を表示PDF形式でダウンロード (1169K) -
佐田 登志夫, 川辺 真嗣, 西山 隆雄, 木村 文彦, 穂坂 衛1980 年 46 巻 4 号 p. 423-428
発行日: 1980/04/05
公開日: 2009/06/30
ジャーナル フリーThe paper describes a computer programming system to generate NC commands for three coordinate measuring machines based on the geometric model of the part to be measured. By utilizing the CAD system called GEOMAP the geometric model of a part is generated first. Then the measuring commands and the other geometrical information necessary for the measurements are given to the computer. The programming system developed processes the inputs, generates the shortest path of the measuring probe for the measurements and prints out the NC commands. When the system detects collision between the probe and the parts, it is able to modify the probe path to avoid the collision. Some experiments to measure squareness between two planes and the center distance between two holes are carried out to prove the validity of the computer programming system.抄録全体を表示PDF形式でダウンロード (1362K) -
予測手法の大略と確率的破壊応力条件臼井 英治, 井原 透, 白樫 高洋1980 年 46 巻 4 号 p. 429-435
発行日: 1980/04/05
公開日: 2009/06/30
ジャーナル フリーThe paper first outlines an analytical method. developed to predict cutting edge chipping of carbide tool in interrupted turning operation, which enables us to know the probability distribution of fracture onset within the cutting edge. In, order to utilize in the prediction method, a new probabilistic criterion is established by superimposing the Weibull's probability distribution upon the tri-axial stress criterion of brittle fracture proposed by B. Paul. The criteria for carbide tool materials determined from static fracture tests in compression and bending are proved to well fit the test results in torsion with or without axial compressive load. The impact fracture tests in compression and bending are designed in order to ascertain the effect of loading rate upon the fracture strength, and some preliminary results are obtained.抄録全体を表示PDF形式でダウンロード (1354K) -
干渉じまの解析と最適実験条件野村 俊, 細野 八郎, 加藤 正, 古川 和男1980 年 46 巻 4 号 p. 436-441
発行日: 1980/04/05
公開日: 2009/06/30
ジャーナル フリーWhen the movement of an object moving toward a hologram plate with constant velocity is recorded by the methods of holographic interferometry using a swirl type shutter, the intensity of a reconstructed image of the object changes according to velocity of an object, exposure time and observational aperture. The above phenomena were analyzed and confirmed by the experiment. The distinctness of the fringe was defined as the differ-ence between the fringe intensity of maxima and minima. By this standard the optimum experimental condition was obtained. On the basis of the above investigations, the standardization of the experimental procedure was shown.抄録全体を表示PDF形式でダウンロード (1219K) -
鳴瀧 則彦, 山根 八洲男1980 年 46 巻 4 号 p. 442-447
発行日: 1980/04/05
公開日: 2009/06/30
ジャーナル フリーTo ascertain the thermal wear of cermet tools, diffusion tests were conducted between the tools and plain carbon steel S 15 C. Machining tests were also conducted to find the relation between cutting temperature and tool wear. The results obtained were as follows : (1) According to the diffusion test, Fe and Ni diffused each other at the temper-ature from 1000 to 1200°C. However, at the elevat-ed temperature of 1300°C, a thick reaction layer which contains Fe, Ni, Mo, W or Ti was generated near the tool surface. And a large amount of carbon diffused from the tool to the steel. (2) Mo and W in nitride type cermet tools were easily diffused to the steel compared with carbide type cermet tools. Generally, Mo and W diffused more easily than Ti. (3) According to the cutting test, thermal wear of cermet tool was remarkable above around 900°C for flank wear, and around 1100 to 1200°C for creater wear. (4) The tool whose elements diffused easily in diffusion test tend to generate a severe creater wear.抄録全体を表示PDF形式でダウンロード (1251K) -
稲村 豊四郎, 佐田 登志夫1980 年 46 巻 4 号 p. 448-453
発行日: 1980/04/05
公開日: 2009/06/30
ジャーナル フリーExperimental and analytical study is carried out on the stability of boring operation with special reference to the increase of stability by partly cutting off the side faces of a boring bar. The experimental results show the improved stability for two specific regions of the tool attachment angle defined between the directions of the cutting tool and the normal axis to the cut-off faces of a boring bar. The results also show that the degree of improvement is rapidly reduced for one of the regions with increasing the cut-off amount for the boring bar, though the stability in the other region is increased still more. Analysis is carried out based on the general theory of three dimensional chattering in three different ways depending on how strong hypotheses are imposed on the derivations of the simplified characteristic equations for the system. The first most simplified way is used to clarify the mechanism of improvement of sta-bility by the proposed method and the other two are for checking how accurately the experimental results can be explained by the analysis. Good agreements are obtained between the experimental and analytical results to show the validity of both the analysis and proposed method itself.抄録全体を表示PDF形式でダウンロード (1056K) -
切残し生成機構の理論的解析松原 十三生, 久保木 貞次1980 年 46 巻 4 号 p. 454-459
発行日: 1980/04/05
公開日: 2009/06/30
ジャーナル フリーA formation of an uncut core in a cutoff process of the bar works is investigated theoretically. The diameter of the uncut core is determined by the cutting force and the weight of the cutoff work and the mechanism of the formation of the uncut core is different depending on which force is pre-dominant for a given cutting condition. Theoretically, the minimum uncut diameter which is determined by the weight of the cutoff work is always existed in any cutting conditions. Providing the optimal tool angle which is predicted by con-sidering the mechanism of the formation of the uncut core, it is possible to obtain the minimum uncut diameter. It is suggested that a higher revolution of the work and a smaller depth of cut are advantageous to the cutoff process from the point of view of the uncut core.抄録全体を表示PDF形式でダウンロード (977K) -
トラバース研削におけるかつぎ現象と寸法生成機構岡村 健二郎, 塚本 真也, 竹山 一郎1980 年 46 巻 4 号 p. 460-466
発行日: 1980/04/05
公開日: 2009/06/30
ジャーナル フリーAccumulation phenomenon and size generation mechanism in traverse grinding show quite com-plicated processes on the wheel surf ace along the wheel width. In order to make these processes clear, the experimental analysis of traverse grind-ing was conducted by widely changing the speed ratio, Kv, the setting depth of wheel, Δr, and the number of total steps, m, (the ratio of the wheel width over the traverse feed per one revolution of the workpiece). The following results were obtained : (1) One of the typical characteris-tics of accumulation phenomenon in traverse grinding is that it changes in such a way that some part of accumulation amount is relieved during the 1st step and the rest of it is transmitted to the next accumulattion. (2) When m is large enough, the size generation effect does not exist on the trailing edge of the wheel surface. In this case the limit residual stock removal, (dr) c, assumes a constant value which has nothing to do with the variables of Kv and ΔT. (3) The relationship between the real cutting depth of wheel, Δ (n), and the size generation amount, ΔR (n), is given by ΔR (n) =c {Δ (n) - (dr) l}, where c is the size generation rate. (4) The main factors which govern the changing processes of size generation mechanism are the displacement between wheel axis and work axis, the wheel wear during each step and the size generation rate.抄録全体を表示PDF形式でダウンロード (1003K) -
縦衝撃を受けた粘弾性棒に生じるひずみとその伝ぱ土屋 八郎, 井上 友一, 森 勇蔵, 井川 直哉1980 年 46 巻 4 号 p. 467-472
発行日: 1980/04/05
公開日: 2009/06/30
ジャーナル フリーThis paper deals with the measurement of pressure wave produced by spark discharge in liquid. Analyses are made, in this paper, for the dynamic response of the nylon bar as a medium to measure the pressure wave. When longitudinal impact is applied on one end of a steel bar which is in contact at the other end with the nylon bar, the propagation of strain wave in the latter is analyzed both experimentally and theoretically.The results obtained are as follows : (1) The strain wave propagation in visco-elastic bars can be analyzed theoretically by using the Laplace transform technique. (2) The model of the nylon bar and its parameters necessary to evaluate the strain at the end of the nylon bar are determined as follows. A three-parameter model is suitable for representing the mechanical behaviour of the nylon bar, and the equivalent Young's moduli and the viscous constant for the model are 1. 3 ×104 kgf/cm2, 2.7 x 104 kgf/cm2 and 1.5×103 kg/cm·s, respectively.抄録全体を表示PDF形式でダウンロード (1083K) -
山崎 新一, 中山 了, 石原 直, 篠山 伸彌1980 年 46 巻 4 号 p. 473-478
発行日: 1980/04/05
公開日: 2009/06/30
ジャーナル フリーPDF形式でダウンロード (1249K) -
吉成 秀樹, 平賀 亮三, 加納 一郎1980 年 46 巻 4 号 p. 479-486
発行日: 1980/04/05
公開日: 2009/06/30
ジャーナル フリーPDF形式でダウンロード (1117K) -
中村 哲夫, 荒井 喜博1980 年 46 巻 4 号 p. 487-493
発行日: 1980/04/05
公開日: 2009/06/30
ジャーナル フリーPDF形式でダウンロード (1259K) -
酸素センサほか大塚 伸也, 幸塚 善作1980 年 46 巻 4 号 p. 494-501
発行日: 1980/04/05
公開日: 2010/02/16
ジャーナル フリー固体ハロゲン化物, 硫化物, 酸化物がイオン性電気伝導を有することは古くから知られており, 種々の研究が行われてきた.Wagnerらはこのような固体電解質を用いたガルパニック電池の起電力を理論的に解明し, さらに約20年前に, 酸化物固体電解質を用いて理論値とよく一致する安定した起電力を得ることに成功した.その後, 数多くの高温化学反応の基礎研究がいろいろな固体電解質, 特にCaO安定化ZrO2電解質を用いて行われてきた.このような固体電解質を用いたガルバニック電池は適切な実験条件下では理論にあった再現性の非常によい測定結果を与え, そのうえ試料を閉鎖系に近い状態にして, サンプリングすることなしに試料の物性を連続測定することを可能とする.そのため, このような電気化学的手法は今日では多くの研究者により種々の分野で活用されており, 高温化学反応を研究する上で欠くことのできないものとなっている.また工業的な実用面への適用も盛んに進められており, その用途はますます拡大するものと期待されている.これらの研究成果は個々に取りあげればきりがないほど膨大であり, 最近では多くの解説あるいは単行本も出版されている.
このように固体電解質を用いたガルバニック電池の重要性が多くの研究者により認識されている反面, 今なおこのような電気化学的手法の信頼性に疑いをもつ人もいるのは残念である.この主な原因は固体電解質の特性の不理解にあり, 誤った実験条件下で使用してもなんらかの測定結果が得られるという, 電気的実験の特質に起因していると思われる.そこで本報では, 主に使われているZrO2 (+CaO) 固体電解質を中心にして, その基本的な電気的特性と起電力測定原理について解説したい.またその代表的な応用例も酸素センサを中心に紹介するが, 詳細は前述の多くの解説を参照されたい.固体電解質を用いたガルパニック電池は適切な実験条件下で使用する限り, 強力な研究手法の一つになるものであり, 本稿が多少なりとも固体電解質を用いた測定結果の信頼性の判定に役に立ち, またこの種のガルパニック電池が種種の分野へと応用される道しるべになれば幸いである.なお本稿中印をつけた部分については, 少しでも理解に役立つようにと, 付録において定性的な説明を試みている.抄録全体を表示PDF形式でダウンロード (1174K) -
久保田 浩司1980 年 46 巻 4 号 p. 502-503
発行日: 1980/04/05
公開日: 2009/06/30
ジャーナル フリーPDF形式でダウンロード (529K)
- |<
- <
- 1
- >
- >|