巻号一覧
52 巻, 2 号
選択された号の論文の26件中1～26を表示しています
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徐 性初1986 年 52 巻 2 号 p. 203-205
発行日: 1986/02/05
公開日: 2009/06/30
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森 隆1986 年 52 巻 2 号 p. 206-209
発行日: 1986/02/05
公開日: 2009/06/30
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内尾 舜二1986 年 52 巻 2 号 p. 210-214
発行日: 1986/02/05
公開日: 2010/02/16
ジャーナル フリー精密成形品用の金型について,その要点等を列記してまとめてみたい.
(1) 金型の剛性を高くすること.モールドベースの材料についてもよく吟味する.
(2) 鋼材の熱処理は出来るだけ回数多く行って, 機械加工時のひずみを取ること.熱処理は鋼種の特性に従って行うこと.
(3) 加工及び測定の温度環境に留意すること.鋼材は素手で触れても膨張する. 機械はスタートすると油の温度が上がって主軸等が膨張する.
(4) 研磨後の精度を出すためには, 可能な限り研磨代を少なくすること(研磨代は筆者のところでは最大2μmである).そのためには精度は機械加工で出すこと.
(5) 機械加工時にワークに加工変質層が発生するのを避けること.ツールの選択,切込み量,切込み回数, 切削・研削の速度等がポイントである.
(6) 上型下型の型合わせ精度はリーダピンによらないこと.
(7) 寸法測定は必ず基準面から行うこと.
(8) 金型温度調節は複数の方法で行うこと.
(9) 多数個取りでキャビティ配置,ランナ距離等に配慮してバランスを取ること.
(10) 成形機との結合性をよく考えること.スプルーは短い方がよい.抄録全体を表示PDF形式でダウンロード (1131K) -
中島 壮1986 年 52 巻 2 号 p. 215-218
発行日: 1986/02/05
公開日: 2009/06/30
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藤田 滋1986 年 52 巻 2 号 p. 219-223
発行日: 1986/02/05
公開日: 2009/06/30
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金井 日出夫1986 年 52 巻 2 号 p. 224-230
発行日: 1986/02/05
公開日: 2009/06/30
ジャーナル フリー市場では,精密機械分野のみならず, エレクトロニクス, 光等の分野の急速な進展を背景に,プラスチック製品 (部品) に対する精密度の要求が急速に高まってきている.しかも, 単に寸法面からだけではなく機械的, 光学的特性の均質性 (等方性) が伴うことが必須となっている.図1に分野別に精密度ニーズの分類を示す.点線部分は,今後更にニーズの上級移行があると考えられる範囲である.
今回は,このような市場の変化に対応して, プラスチック原料メーカの立場から材料開発の考え方を実例をあげながら述べることにしたい.抄録全体を表示PDF形式でダウンロード (1074K) -
八木 敏雄1986 年 52 巻 2 号 p. 231-235
発行日: 1986/02/05
公開日: 2009/06/30
ジャーナル フリー35mmのコンパクトカメラにおいてはエンプラ部品が年々多用化されてきており, 技術的観点からみるとすでに完成されたごとくにとられると思うが, 実態は本文でも述べてきたように多くの課題をかかえている状況である.顕在化している問題点の解決には当然取り組むことになるが, 新技術開発の面においても先行していく必要がある.
例えば,
・高価なエソプラを100%リサイクル使用し材料の節減を図る技術
・多部品適用金型による金型費の節減の技術
・電気回路のインサート成形による成形品の多機能化技術
・レンズ類のアウトサート成形により組立工程を省略する技術
等々
原価低減及び多機能化の面での研究課題は山積みされている.
これらの課題を解決するには関係する多くの研究機関及びメーカの協力なしには実現不可能な内容である.今後も今まで以上に関係を密にして研究成果が出たら実用化にむけての展開を積極的にされることを期待するものである.抄録全体を表示PDF形式でダウンロード (8526K) -
森川 修1986 年 52 巻 2 号 p. 236-239
発行日: 1986/02/05
公開日: 2009/06/30
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仲野 義和, 藤田 康郎1986 年 52 巻 2 号 p. 240-245
発行日: 1986/02/05
公開日: 2009/06/30
ジャーナル フリー今日の本格的なビデオディスク時代の幕明けは, 1972年12月, アメリカのMCA社がHe-Neレーザビームを用いたDISCOVISION方式を完成し, その年の9月にオランダのフィリップス社がVLP方式を発表したころからと言える.その後, 1974年には両社の光学方式ビデオディスクシステムについての提携が行われ, 今日の非接触光学方式として一本化され, パイオニアはこの最も新しい方式を採用し, その上に独自の高度な精密加工技術と光学技術を加えることにより高次元の商品化を実現した.抄録全体を表示PDF形式でダウンロード (927K) -
鈴木 利助1986 年 52 巻 2 号 p. 246-248
発行日: 1986/02/05
公開日: 2009/06/30
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土肥 寿秀1986 年 52 巻 2 号 p. 249-252
発行日: 1986/02/05
公開日: 2009/06/30
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後藤 文男1986 年 52 巻 2 号 p. 253-254
発行日: 1986/02/05
公開日: 2009/06/30
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柳原 栄一1986 年 52 巻 2 号 p. 255-260
発行日: 1986/02/05
公開日: 2009/06/30
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XI.ディジタルデータの場合田口 玄一1986 年 52 巻 2 号 p. 261-265
発行日: 1986/02/05
公開日: 2009/06/30
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藤井 義也, 岩部 洋育1986 年 52 巻 2 号 p. 273-278
発行日: 1986/02/05
公開日: 2009/06/30
ジャーナル フリーThis paper deals with the influence of chuck and collet on deflections in end milling. The results are as follows. (1) The deflection of spindle E0 in end milling is divided into three portions, namely, by chuck E1, by collet E2 and by end mill E3. And the distribution ratios are given by E1/E0, E2/E0 and E3/E0 for various diameters of end mill. (2) The ratio E3/E0 by end mill is from 25 to 45% for 16 mm diameter. So it is obvious that working accuracy with end milling is affected significantly by the deflections E1 of chuck and E2 of collet. (3) The ratio E3/E0 by end mill increases, but the ratios E1/E0 by chuck and E2/E0 by collet become decrease with smaller diameter of end mill. (4) The deflection curve of spindle shows a discontinuous manner by collet, however deflection curves are independent of any slit position.抄録全体を表示PDF形式でダウンロード (1092K) -
切削工具材の表面工学的解析と欠損防止に関する研究 (第1報)竹山 秀彦, 飯島 昇, 山本 幸弘1986 年 52 巻 2 号 p. 279-284
発行日: 1986/02/05
公開日: 2009/06/30
ジャーナル フリーThe objective of this study is to clarify the mechanism of metal adhesion on the cutting tool and to prevent its brittle fracture due to metal adhesion. The WC-Co cemented carbides, of which surfaces were processed by diamond wheel grinding, aluminum oxide wheel grinding, electrolytic grinding, sandblasting and coating of TiC and TiN, were subjected to cutting tests, in order to assess the tool life in view of brittle fracture due to metal adhesion, and to surface characterization to correlate it with the cutting performance. The important findings are that the surface treatments of carbide tool greatly affect metal adhesion and hence brittle fracture due to metal adhesion, and especially, carbide tools ground with an aluminum oxide wheel exhibit excellent adhesion resistance to yield longer tool life in the sense aforementioned and superior quality of machined surface.抄録全体を表示PDF形式でダウンロード (24978K) -
中野 嘉邦, 加藤 秀雄1986 年 52 巻 2 号 p. 285-290
発行日: 1986/02/05
公開日: 2009/06/30
ジャーナル フリーThis paper presents a new practical method of balancing grinding wheels in the case of surface and cylindrical grinding machines. In this method, the grinding wheel is mounted on its own grinding machine without any changes of commercially available wheel flanges and grinding machines. The relative displacement between the wheel head and the work table is detected by using a gap sensor under running conditions. Simultaneously, the phase of the peak of the relative displacement with respect to a datum line on the wheel is measured by using a reflecting photo-sensor and an aluminum foil sticked on the face of the wheel. On the basis of the amplitude and phase shown on two indicators of a newly developed instrument, the balancing procedure is performed manually when the wheel is stationary by shifting correcting masses in the same way as the conventional gravitational method. By using this method, the amplitude of the relative displacement between the wheelhead and the work table can be reduced easily to about twenty to thirty per cent of the values in the case of the conventional gravitational method.抄録全体を表示PDF形式でダウンロード (13488K) -
各種ツルーイング法のツルーイング効果について松井 正己, 庄司 克雄, 山尾 昌道1986 年 52 巻 2 号 p. 291-296
発行日: 1986/02/05
公開日: 2009/06/30
ジャーナル フリーDiamond wheels must be correctly prepared in order to give optimum results in grinding. This preparation will be sufficed by only truing operation for diamond vitrified wheels. This paper first describes a brief investigation of truing performance on the most widely used truing techniques for preparing vitrified wheels. The main obtained results are as follows : (1) Single-point diamond tool or diamond impregnated tool has a comparatively high efficiency in truing but cannot derive a satisfactory grinding performance from the diamond wheel. SEM observations shows that the wheel surface trued by these techniques contains numerous grains with flat plateaux. (2) Diamond wheel after truing with a silicon carbide brake truer has a higher performance in grinding but remains out of round by 2-3 μm. On the basis of these results a new technique with GC cup truer is proposed in the rest of this paper. This device consists of a silicon carbide wheel with the axis perpendicular to the grinder table. This technique is discussed in detail and proved to be satisfactory in truing effect and efficiency.抄録全体を表示PDF形式でダウンロード (13541K) -
田中 武司, 井川 直哉, 上野 信幸, 岡田 昭次郎, 津田 展宏, 小川 茂樹1986 年 52 巻 2 号 p. 297-299,343
発行日: 1986/02/05
公開日: 2009/06/30
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測定のための図面処理の手法高増 潔, 大園 成夫1986 年 52 巻 2 号 p. 300-305
発行日: 1986/02/05
公開日: 2009/06/30
ジャーナル フリーIn this report, the drawings are recognized for the basis of measurements and the drawing processing is discussed from this point of view. First, the general characteristics of drawings is discussed. Then, “Drawing Space” is defined which is three dimensional space described by the drawing. “Product-solids” are created by two loops on the drawing so as to minimize units in the drawing space. The “Part Divide” method that processes drawings of polyhedron parts is proposed, and this method extract the structure of the drawing space by using product-solids. The contradictions and the equivocals of drawings can also be found by this method. From these results, the structure of the drawing space can be composed from top to down. Using this information, the measuring point is recognized by the relationship between the position of the projected point and loops on the drawing. This method and the structure of the drawing space are intended to use for automatic measurements of parts.抄録全体を表示PDF形式でダウンロード (1143K) -
石田 智利, 箕輪 元, 中島 尚正1986 年 52 巻 2 号 p. 306-312
発行日: 1986/02/05
公開日: 2009/06/30
ジャーナル フリーThis paper shows a computerized method to detect unanticipated functions of a machine for verifying the design before manufacturing. As for the detection of the functions mentioned above, we think the approach of simulating disigner's thinking behaviour is effective. In our system, the structure of the whole assembly, which is described by the Feature Descriptor, is transformed and stored in the frame structure in a computer, and the detection procedures with knowledge are kept also in the frame structure. Thus, the evaluation about such as fluid leakage, impossibility of disassembling and various unnoticed defects, can be done by applying the procedures obtained from the frames to the machine structure.抄録全体を表示PDF形式でダウンロード (1249K) -
コンクリートベッドの振動特性に関する研究永易 修, 新納 敏文, 杉下 寛, 西山 宏, 佐藤 壽芳, 大堀 真敬1986 年 52 巻 2 号 p. 313-318
発行日: 1986/02/05
公開日: 2009/06/30
ジャーナル フリーRecently it has been an important theme to improve dynamic rigidity and damping characteristic of machine tools. One method to solve this problem is to use new materials, which are concrete, plastics and ceramics, as structural elements of machine tools. The present paper aims at development of machine tools of better dynamic characteristics with hydraulic concrete which is one of new materials and has high damping characteristic. The object of this paper is machining center with vertical milling head. The cast iron bed of the machine is charged with concrete bed and improvement of dynamic characteristics and cutting performance of machining center are experimentally studied. For the 1st report, the results of comparative experiments of two beds are reported. Following some advantages of concrete bed are obtained : (1) By means of suitable coating of surface, concrete endures cutting oils and drying shrinkage of concrete is very little. (2) Bending rigidity of concrete bed can be made almost equal to that of cast iron bed. (3) Natural frequencies are high and mode shapes are simple. (4) Damping ratio is high and especially good in high frequencies.抄録全体を表示PDF形式でダウンロード (1040K) -
原理とその動作小泉 邦雄, 横山 恭男1986 年 52 巻 2 号 p. 319-325
発行日: 1986/02/05
公開日: 2009/06/30
ジャーナル フリーThe study deals with analysis for development of the hammering machine with the shock isolating anvil. It consists of the rigidly installed machine body and the elastically suspended anvil on the body or a rigid base. The anvil causes self synchronous impact motion with the hammer. Damping of the anvil system must be small for the active motion. A work is held at a constant colliding position by operator's hands on a guide table and given counterblow by them. The few important points of this isolation method are as follows : (1) The work must be light enough compared with the anvil. (2) Anvil ratio must be large, more than about 15, under condition that a damped natural frequency of the anvil system is lower than an exciting one. (3) If the ratio of these frequencies is adjusted to 1/2, the work receives impact at static equilibrium position of the anvil head. The feeling of work operation approaches to that in the case of a rigidly connected anvil.抄録全体を表示PDF形式でダウンロード (1273K) -
寿命試験機の試作とシングルナットボールねじの寿命試験結果下田 博一, 井沢 実1986 年 52 巻 2 号 p. 326-331
発行日: 1986/02/05
公開日: 2010/02/16
ジャーナル フリーIn this paper, the 12 life testing apparatuses of ball screw are made on a trial basis, and the life test of the 25 precision ball screws (C 3 class) with single nut are carried out. Based on the results of these life tests, the states of the initial fatigue failures and their progress and the life distribution of the ball screws are discussed. The main results are as follows : (1) The initial fatigue failure are occurred at the nut raceway on the back side of ball return tube for nearly all the ball screws. (2) The initial fatigue failures of the ball screws are generated by the very small pittings or the surface-initiated cracks, which grows to the flakings. (3) The scattering of the ball screw lives is fairly small as compared with that of the rolling bearing lives. (4) The basic dynamic load rating is 20% greater and the rating life is 77% longer than those which are recommended by the ball screw manufactures.抄録全体を表示PDF形式でダウンロード (8221K) -
馬 樹元, 下河辺 明1986 年 52 巻 2 号 p. 332-337
発行日: 1986/02/05
公開日: 2009/06/30
ジャーナル フリーDevelopment of three dimensional (3 D) measuring machines which are not equipped with axes; x, y, z axes and/or joint axes, is important because such machines do not suffer from the Abbe's errors, play and clearance of joint axes, and/or elastic deformation of mechanisms. This paper first introduces the principle of a new coordinate measurement system using ultrasonic waves in which : (1) some fixed receivers receive several kinds of ultrasonic signals from a movable transmitter, (2) from the phase shifts between the transmitted and received signals, distances of the transmitter from the receivers are calculated, and (3) from the distances, 3 D coordinates of the transmitter are determined by triangulation. Secondly, the paper explains a measuring setup. Some experimental results in a space of 300 mm×300 mm×1000 mm shows that the errors of 1 D measurements are less than 0.2 mm and those of 2 D and 3 D are less than 1 mm and 2 mm respectively. The causes of the errors are also discussed.抄録全体を表示PDF形式でダウンロード (1154K) -
三井 公之, 小沢 則光1986 年 52 巻 2 号 p. 338-342
発行日: 1986/02/05
公開日: 2009/06/30
ジャーナル フリーIt is well known that the surface of ground workpiece often contain visible chatter patterns, such as diagonal grid of parallel lined patterns. These patterns, often occur in finish grinding operations, may be unacceptable by the inspection or as in case of rolls for sheet metal production or dies for plastics parts production, they may be transferred on to the parts and reduce its quality. At present the intensity of the pattern is assessed by visual inspection and forms a part of a machine tool acceptance test. But it is of course a subjective test. So, a less arbitrary technique is required. A simple method of quantitative assessment of certain patterns visible of precision ground surface has been developed. The measuring system is described in detail and the measuring results of its application for several specimen are also given.抄録全体を表示PDF形式でダウンロード (933K)
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