出版者

公益社団法人 精密工学会

雑誌

精密機械 (ISSN:03743543)

巻号頁・発行日

vol.10, no.117, pp.360-391, 1943-06-25 (Released:2009-06-30)

著者

小林 昭

出版者

公益社団法人 精密工学会

雑誌

精密機械 (ISSN:03743543)

巻号頁・発行日

vol.21, no.242, pp.134-140, 1955-04-05 (Released:2009-06-30)

参考文献数

11

被引用文献数

1

著者

倉藤 尚雄

出版者

公益社団法人 精密工学会

雑誌

精密機械 (ISSN:03743543)

巻号頁・発行日

vol.24, no.277, pp.121-124, 1958-03-05 (Released:2010-02-16)

被引用文献数

1

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昨年7月9日に,訪ソ工作機械視察団に加わつて羽田をたち,ソ連で約3週間工作機械工場,研究所を見学した.8月5日モスクワで団が解散した後,東大の曾田範宗,竹中規雄,束工大の益子正己の諸氏と西欧に出,ドイツ,スイス,フラソス,イギリスの工場見学をして,9月30日に帰国した.今回私の旅行は,放電加工見学を主目的にしたが,ソ連では旋盤,研削盤のような工作機械を見せるつもりであつたので,放電加工は偶然ぶつかったもの丈しか見られず,大変残念であつた.但し,ラザレソコ,レビンソン,リフシツの諸氏に会つて,交献交換が出来たことは何よりであつた.西欧は輸入商社の方々のあつせんで,有力メーカー,研究所の殆んどをたずねる事が出来,又Hannoverで開かれた第5回欧州工作機械展を見られたのは大きい収穫であった.

著者

樋田 並照

出版者

公益社団法人 精密工学会

雑誌

精密機械 (ISSN:03743543)

巻号頁・発行日

vol.33, no.392, pp.600-605, 1967-09-05 (Released:2010-02-16)

参考文献数

7

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At the determination of standard Vickers hardness number, it is one of the most important problem that the diagonal lengths of indentations are determined accuratly, but the absolute length can not be obtained by the ordinary measuring principles.A new method has been found to determine their absolute values. In this method, the relation between the test load pi and the measured value of diagonal length dij, in which the personal error βj is involved, is given by the following formula;-dij-βj = (2sin θ/2/Hv) 1/2pi1/nwhere θ is the angle included between opposite Faces of Vickers indenter, and Hv is the invariable Vickers hardness of a specimen, and 1/n is a parameter which gives the hardness dependency of the material to indentation load.The experimental data are verified in conformity to the above formula by using the regression analysis, and thus the absolute value of diagonal length and personal error are estimated by the aid of the least mean square method, and it becomes possible that both the absolute length and individual personal error can be determined with the accuracy of about 0.15μm at confidence coefficient of 95%.

著者

藤本 定正

出版者

公益社団法人 精密工学会

雑誌

精密機械 (ISSN:03743543)

巻号頁・発行日

vol.37, no.434, pp.184-189, 1971-03-05 (Released:2009-06-30)

参考文献数

6

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There are two kinds of worked surfaces turned with diamond tools. One of them is called iridescent surface and the other is called specular one. Moreover the iridescent surfaces are classified into glossy, ordinary, and white. The sections of turned surfaces have a periodic array of tri-angle which is made with feed of lathe and configurations of tools. It is made to examine the relation between the maximum heights of uneveness on the slopes of the triangular grooves (Umax) and the kind of turned surf aces.Some sumples are turned and the pitches and heights (Rmax) of the tri-angular grooves on them are constant but only Umax of them is changed. The Umax and the distributions of diffracted light intensity are measured with an interference microscope with total magnification 1000 times and an automatic recoding goniophotometer respectively. These samples are classified into each kinds of turned surfaces by 15 judges and the results are discussed with the observation of technique of sensory test.The classified kinds of iridescent surfaces are specular, glossy, ordinary and white according to ascending value of Umax. The psychological boundary between specular and glossy iridescent surfaces is definite comparatively, because only existence of iridescent light is judged mainly. The boundary is defined with the degree of smoothness of the slopes, in this case, it of Umax at a probability of 80% is 0.18μm. When Umax of a sample is smaller than 0.18μm, the sample is judged to be specular. The boundaries between glossy and ordinary, and white iridescent surfaces can not be defined. When the slopes are rougher than 0.40μm (in Umax), it becomes difficult to judge the intensity of iridescent light.

著者

大和田 国男

出版者

公益社団法人 精密工学会

雑誌

精密機械 (ISSN:03743543)

巻号頁・発行日

vol.29, no.339, pp.271-276, 1963-04-05 (Released:2010-02-16)

参考文献数

3

著者

STOFERLE TH. ERTL F. MCKEOWN P. A. SCARR A. J. 宮本 克巳

出版者

The Japan Society for Precision Engineering

雑誌

精密機械 (ISSN:03743543)

巻号頁・発行日

vol.44, no.526, pp.1282-1283, 1978

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Me'STCワーキングパーティは多軸測定機および多軸工作機械の精度をどうすれば最も良く表現できるかについて詳細に研究した.<BR>彼らは一軸機には1次元の不確かさ (one dimensional uncertainty) (1DU) を, 二軸機には2次元の不確かさを, 三軸機には3次元の不確かさという術語の適用を推奨している.<BR>(1DU) と (2DU) に対する式は, よく知られた蝶ネクタイ (bow-tie) 形テンプレートの概念を基礎にしており, 定数項, 長さに関連する項および応用の不確かさ (application unceftainty) (AU) をカバーする項を含んでいる.<BR>テンプレートの式を造りあげる概念と方法は, この問題に関する幾つかの公表論文の合理的説明であり, (3DU) の場合にもすぐ適用できると考えられる.

出版者

公益社団法人 精密工学会

雑誌

精密機械 (ISSN:03743543)

巻号頁・発行日

vol.28, no.329, pp.357-363, 1962-06-05 (Released:2009-06-30)

著者

半田 邦夫 堀内 生一

出版者

公益社団法人 精密工学会

雑誌

精密機械 (ISSN:03743543)

巻号頁・発行日

vol.50, no.2, pp.435-440, 1984-02-05 (Released:2009-06-30)

参考文献数

10

被引用文献数

1

出版者

公益社団法人 精密工学会

雑誌

精密機械 (ISSN:03743543)

巻号頁・発行日

vol.7, no.86, pp.636-670, 1940

著者

飯田 喜介

出版者

公益社団法人 精密工学会

雑誌

精密機械 (ISSN:03743543)

巻号頁・発行日

vol.24, no.282, pp.424-426, 1958-08-05 (Released:2010-02-16)

参考文献数

8

---

Coincidental result of the analysis with the experiment on the relation between the conditions of impact and the deformation was reported previously.Influence of friction at the contact surface was considered analytically in this report, and the result was compared with that of the experiment.The volume (V) of indentation is expressed by coefficient of friction (μ), normal stress (σ) at the contact surface, kinetic energy (1/2mv2) of sphere and diameters (d, D) of indentation and sphere as following;V=1/σ(1+μd/5D)-11/2mv2So far as the indentation is not so large, friction term is negligible.

著者

長山 三男

出版者

公益社団法人 精密工学会

雑誌

精密機械 (ISSN:03743543)

巻号頁・発行日

vol.10, no.117, pp.325-344, 1943

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本研究の結果,摩擦圓盤装置が多少の誤差を伴ふも,對空射撃指揮具内の航速測定用計算機構として實用し得るを確認するのみならず,計算機の目的に應じ如何なる注意を拂ふべきやも明瞭にし得たものと信ずる.以上を一括すれば<BR>(1)機素の精度は現在の精密工作法にて充分である.尚送りネヂの中央部分を特に嚴密に工作し誤差を減ずれば一層良い.<BR>(2)組立誤差中,最も影響大なる摩擦圓盤の傾斜はその軸を長くし支持法を適當に改めれば除き得る.目的に應じ(24)式に依り檢討するの要あるは當然である.<BR>(3)滑りとHertzの彈性變形は,それ自身としては顧慮外に置き得る程度である.然し新しく轉動盤を設計するに際しては<I>r</I>/<I>R</I>を次の如く決定すると宜しい.即<BR><I>A</I>=§/μ<SUP>3</SUP>&radic;9/128θ<SUP>2</SUP>(1/<I>R</I>+1/<I>r</I>)<I>P</I><SUP>2</SUP><BR>を觀察するに,立方根内の1/<I>R</I>+1/<I>r</I>の項は,今迄考へてきたる程度の<I>R</I>の大さにては,1/<I>r</I>が遙に大きく,<I>R</I>を増すも餘り變化なし.然るにξ/μの方は表3を見ればτ=20°以以では急激に減少するを以て,τを極めて小にしてみる.即τ=10°とせば<BR><I>M</I>-<I>N</I>/<I>M</I>+<I>N</I>=1-<I>r</I>/<I>R</I>/1+<I>r</I>/<I>R</I>=cos10°=0・98<BR>從つて<I>r</I>/<I>R</I>=1/99.故に<I>r</I>=1・5mmなれば<I>R</I>=148・5mmとなる.これより<BR><SUP>3</SUP>&radic;9/128θ<SUP>2</SUP>(1/<I>R</I>+1/<I>r</I>)=1・05,<BR>又ξ/μ=0・423なるを以て<BR><I>A</I>=0・44<I>P</I><SUP>2/3</SUP>(μ)<BR>となり半減する.然し<I>R</I>=148・5mmの轉動輪は固定式に非れば使用困難であらう.<BR>設計に際しては最初<I>r</I>を決定し,摩耗の状態を實驗し,次に計算機の大さに應じRを適當に定むれば良し.<BR>(4)摩擦圓盤の表面仕上程度は極力良好ならしむ.<BR>(5)接觸壓は摩耗を顧慮しつつ増大するを可とす.<BR>(6)摩擦圓盤の角速度は小なるが良い.且その誤差は1/1000以下ならしめるが良い.<BR>(7)材料は徑年變化少きものを選定し,熱處理に注意を拂ふこと.材質は現在使用中のものにて良し.<BR>(8)最後の調整は計算と實驗とに依り轉動輪の徑を適宜縮少して行へば良し.<BR>要するに固有滑りの物理的基礎附けは未だしなるも,工業的,實驗的には本装置の適用範圍と研究方法とを究明し得たるなり.<BR>尚BushがDifferential Analyserに使用せる摩擦圓盤装置はトルク増幅器を使用する爲轉動輪の採るべきトルクは極めて小にて可なる爲,延いては接觸面積も小となり,Analyser全體にて精度を0・1%以内に收め得ると云ふ.此の精度には,本装置にては(1)乃至(8)項に亘る條件に注意し且2mm以上のρの範圍にて使用するが如き,固定式大型のものを設計製造せば到達し得る筈なり.<BR>又Hertzの彈性變形の基礎的實驗法を擴張應用する時,各種の精密測定器或はスフエロ計等の測定壓及測定端面の問題,又は球軸承の球の變形に伴ふ偏心運動の問題等の再檢討に役立つこと大なるものありと信ずる.

著者

川野 恵一郎 青山 昇

出版者

公益社団法人 精密工学会

雑誌

精密機械 (ISSN:03743543)

巻号頁・発行日

vol.51, no.9, pp.1689-1694, 1985

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ダイヤモンドと人間との触れ合いは, 富の象徴として古くからあり, 時によっては戦争にまで発展した事実は周知の通りであるが, 近年は工業用として, 広く使われている.特に人工的にダイヤモンドが造られるようになってからの普及度は驚くべきものがあり, 先端技術に寄与する度合は今後ますます増大すると思われる.<BR>当社においても, 硬ぜい材料の研削・研磨用としてダイヤモンド砥石を自社で製造しながら, 工業用サファイア, 同ルビーの加工をはじめ, ダイヤモンドのレコード再生針の製造を通じて, 実績を積み, 最近では後述の工業用ダイヤモンドを使用した製品を製作している.<BR>ダイヤモンドを使用した工業用部品の用途は, 現状では硬度特性を利用することがほとんどであるが, 最高の伝熱性に着眼した利用法も考えられている.<BR>貴金属類も, 今では工業用に数多く使用されているが貴石類も同様に各分野で使用されている.<BR>地殼の形成で作られた天然ダイヤモンドも, 今では人工的に製造され, 近々2~3ctのものも量産的に製造されるようになれば, 用途も更に拡大され先端技術材料としてますます輝きを増すようになろう.

著者

藤本 定正 鮎沢 隆 巣山 博美

出版者

公益社団法人 精密工学会

雑誌

精密機械 (ISSN:03743543)

巻号頁・発行日

vol.32, no.377, pp.409-413, 1966-06-05 (Released:2010-02-16)

参考文献数

1

被引用文献数

2

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The angular distributions of reflected light from specular and indecent metal-surfaces finished by diamond cutting tools are measured by an automatic recording goniophotometer. The results are compared with the diffraction theory of optical gratings with triangular grooves with two flat faces, and the difference is discussed in connection with irregularity of the side faces of grooves on the surfaces.On both sides of the grooves on iridescent surfaces, there are many fine streaks parallel to the grooves which seem to be caused by unevenness of cutting edges of diamond tools. On other hand, the cutting edges of tools for specular surfaces are flat, and the distribution curves of reflected light correspond to the results calculated with diffraction theory fairly well.

著者

角田 馨 福田 栄治

出版者

公益社団法人 精密工学会

雑誌

精密機械 (ISSN:03743543)

巻号頁・発行日

vol.26, no.309, pp.580-584, 1960

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In most cases, the inner surface of the inner ring of the roller bearing or the inner surface of bushings is ground by the roll type centerless internal grinder.<BR>In this case, the work is held by 3 rolls and ground. Thus, the roll pressure imposed rdially on the work will restrict the vibration of work and, as well, will provide the work with axial thrust in the direction of the support. In auto-gaging, the gage pressure will work in the direction counter to the thrust and, if the work moves minutely in the direction of the axis, eventually working accuracy will be greatly affected adversely. As correlativity between the gage pressure and dimension accuracy exists, the correlativity between the roll pressure and thrust was sought for in order to establish the gage pressure.

著者

菊地 千之 臼井 英治 星 光一

出版者

公益社団法人 精密工学会

雑誌

精密機械 (ISSN:03743543)

巻号頁・発行日

vol.30, no.351, pp.316-324, 1964

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Based upon the slip line theory applied to machining with cut-away tools proposed in the previous papers, the cutting force equilibrium through the plastic field is analyzed.<BR>Cutting forces and chip formation in machining with various types of cut-away tool are compared with the conventional tool. Tools having restricted double rake face are discussed in view of cutting forces, chip formation and slip line construction of the plastic field produced.

著者

星 光一 臼井 英治

出版者

公益社団法人 精密工学会

雑誌

精密機械 (ISSN:03743543)

巻号頁・発行日

vol.34, no.397, pp.113-120, 1968

被引用文献数

1

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Wear characteristics and tool-life curves in machining of low and medium carbon steels with various types of cut-away tools made of carbide and high speed steel are described and compared with those for conventional tools.<BR>Although an artificial reduction of natural tool-chip contact length usually reduces both crater and flank wear, there always exists optimum value of contact length below which tool-life is shortened. The optimum length depends on side rake angle of the tool and is found that the smaller the rake angle, the shorter the length becomes.<BR>In comparison of tool wear at the optimum contact length, it is found that flank wear is somewhat increased, but crater is substantially reduced as the rake angle is decreased.<BR>Tools with sufficiently reduced contact length show a special type of crater which is not formed on the first rake face, but mainly develops along the second rake face. This characteristic is well explained by the theory of cutting mechanism presented in the previous papers.<BR>Not only cutting temperature but also shape of cutting edge has a great importance on tool wear even in high speed machining. The wear mechanism appears to be explained as a stressdependent rate process.

著者

岸浪 建史 秋山 俊彦 星 光一

出版者

公益社団法人 精密工学会

雑誌

精密機械 (ISSN:03743543)

巻号頁・発行日

vol.37, no.441, pp.701-707, 1971

被引用文献数

1

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This paper describes the effects of the artificially controlled shear angle on the metal cutting process. From the experiments in which commercially pure lead is cut with various controlled shear angles, constant cutting speed, and depth, and various rake angles, the following results were obtained.<BR>(1) Taking rake angle (&alpha;) as parameter and increasing the controlled shear angle (&phi;), the points (&phi;, &beta;-&alpha;) move along a right convex curve on the &phi; vs &beta;-&alpha; plane on which critical points giving a minimum value of cutting force (<I>F<SUB>c</SUB></I>, min), lie in the vicinity of Merchant's Line.<BR>(2) The variation of &phi; does not influence the friction force on the rake face (CF), and the angle which gives a minimum cutting force (<I>F<SUB>c</SUB></I> min) gives a maximum value of coefficient of friction on the rake face.<BR>(3) Hydrostatic pressure on the shear plane increases with the increase of &phi;, and does not influence the shear stress on it.<BR>(4) It has been confirmed either the shear plane model does not agree with the cutting mechanics for low cutting speed or the angle &phi; is such that the total cutting power is not minimum.

著者

嘉数 侑昇 沖野 教郎 星 光一

出版者

公益社団法人 精密工学会

雑誌

精密機械 (ISSN:03743543)

巻号頁・発行日

vol.38, no.448, pp.436-442, 1972

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Due to the increasing popularity of Numerical Controlled Machine Tool Systems, the development of the higher level soft wares in this field becomes necessary. Further more, direct connection between Computer-Aided Design (CAD) and Computer-Aided Manufacturing brings about a problem.<BR>In order to cope with these situations, this paper proposes a new method on the automatic programming for NC considering the connection of both systems.<BR>After description of the workpiece profile by &ldquo;Formulated Pattern&rdquo; in the process of CAD, this method makes it possible to generate automatically NC commands for the tool path.<BR>The basic idea of this method is to establish the penalty surface arround the workpiece profile as a guide for determining the tool path.<BR>Since, using &ldquo;Formulated Pattern&rdquo;, the penalty can be given such as having minimum value on the cutting point, the problem for finding tool path is reduced to that for seeking minimum on the penalty surface.<BR>In this paper a theoretical development of this principle and practical algorithm for the determination of tool path are described with two examples, NC milling of NASA Airfoil pat-tern and plate cam designed by CAD procedure. Then, a method for collision check using same principle is described too.

著者

臼井 英治 星 光一

出版者

公益社団法人 精密工学会

雑誌

精密機械 (ISSN:03743543)

巻号頁・発行日

vol.30, no.350, pp.273-284, 1964

被引用文献数

4

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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.<BR>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.<BR>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.