巻号一覧
後続誌
38 巻, 450 号
選択された号の論文の8件中1～8を表示しています
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内部熱源による非定常熱変形奥島 啓弐, 垣野 義昭, 菊池 敏彦1972 年 38 巻 450 号 p. 565-571
発行日: 1972/07/05
公開日: 2010/02/16
ジャーナル フリーThermal deformations in unsteady-state condition due to inner heat sources are studied in this paper, as a part of the study on the thermal deformation of machine tools.
The amount of heat generation and thermal characteristic values, for instance heat transfer coefficient of machine surface and thermal resistance of the contact surfaces, play an important role in the thermal deformation in unsteady-state condition. These values are measured in practice for the analysis.
Temperature distributions and thermal deformations of a model column of ABS resin and a horizontal-type milling machine are analyzed using the finite element method and are compared with those measured in practice.
It became clear that thermal deformations of machine tools in unsteady-state conditions can be estimated with moderate accuracy using the finite element method, when the values of heat generation and thermal characteristic values are given.抄録全体を表示PDF形式でダウンロード (1216K) -
非線形制約条件の場合岩田 一明, 室津 義定, 岩壺 卓三, 大場 史憲, 竹森 弘尚1972 年 38 巻 450 号 p. 572-579
発行日: 1972/07/05
公開日: 2009/06/30
ジャーナル フリーAn analytical method and its algorithm for numerical calculation are proposed to determine the optimum cutting conditions considering the probabilistic nature of the objective funtion and non-linear constraints. The effectiveness of the proposed method is demonstrated by means of an example. The optimum cutting conditions for minimum production cost are affected by the probabilistic nature of coefficients in the non-linear and linear constraints. It is also shown that the optimum cutting conditions are affected by the uncertainty of the predicted tool life for the severe surface roughness constraints, and production cost at optimum cutting conditions increases as the probability level for the tool life increases.抄録全体を表示PDF形式でダウンロード (1329K) -
かつぎ現象の解明岡村 健二郎, 中島 利勝1972 年 38 巻 450 号 p. 580-585
発行日: 1972/07/05
公開日: 2009/06/30
ジャーナル フリーIn cylindrical plunge grinding where a plunge speed is set so that a depth setting per one revolution of workpiece becomes of the order of 10-3 mm, there exists an accumulation phenomenon of interference depth of wheel and the accumulation phenomenon in grinding leads to two transient states, a state of spark-in grinding at the beginning of grinding and a state of spark-out grinding after stop of the infeed of grinding wheel.
The purpose of this study is to get a foundation for scientific understanding of grinding process by combining an analysis of transient characteristics in grinding with that of grinding process in steady state.
In this paper the concept of the accumulation phenomenon in grinding is made clear by analyzing the variation of grinding force in spark-in, steady and spark-out states in plunge grinding, and the spark-in and spark-out grinding times. Then it is indicated that the two plunge speed grinding is effective to make the spark-in grinding time shorter.抄録全体を表示PDF形式でダウンロード (3363K) -
山本 明, 前田 良昭, 板本 宗一, 峰 直毅, 井上 雄次1972 年 38 巻 450 号 p. 586-591
発行日: 1972/07/05
公開日: 2010/02/16
ジャーナル フリーFor the further experimental analysis of metal cutting dynamics, a new tool-dynamometer of piezoelectric type has been developed. In this dynamometer, the cutting edge block is mounted on the top of the tool shank through two piezoelectric elements-Lead Titanate Ceramics-having a good high frequency response and heat-resisting, and by which the cutting force components are picked up independently of the tool displacement. Therefore, this dynamometer can measure these force components strictly even under the tool-vibration.
Results of the basic investigations of this dynamometer characteristics show a good line-arity and a better high frequency response than the force-displacement type dynamometer generally used today. The cross-talking between its outputs, so bad in those made in the earlier stage, has been improved so low as to give few disadvantage. Besides, some metal cutting experiments with this dynamometer indicates that some interesting correspondences are observed between the cutting force variation and the tool displacement under dynamic cutting conditions and that so called the cutting speed coefficient of dynamic cutting force, which is usually estimated from the data under stationary cutting states, can be measured directly under dynamic cutting states. Like these, this dynamometer may be expected to clarify the unknown fields of metal cutting dynamics.抄録全体を表示PDF形式でダウンロード (3553K) -
切りくず形状の研究(第1報)中山 一雄1972 年 38 巻 450 号 p. 592-598
発行日: 1972/07/05
公開日: 2010/02/16
ジャーナル フリー以上で切りくずがとるらせんの形状と位置に関するすべての情報がただ三つの量によって一義的にきまることが示された.すなわち,たとえば流出角η,上向きおよび横向きカールの曲率半径ρxとρzの3者が与えられれば,らせんの半径ρとピッチp,およびらせんの軸の傾角θとx-z面からの距離eが上記諸式で与えられる.
ただし以上は切りくず分離線を基準にして表示したものであり,実際には切れ刃に対する位置が問題になるので,さらに切りくず-すくい面接触長さと分離線傾角ψを知る必要がある.前者はあまり問題にならないが,ψは高送り切削ではかなり大きくなり,切りくずの折れやすさに影響する.抄録全体を表示PDF形式でダウンロード (3528K) -
レーザによる薄膜加工の研究(第4報)高本 喜一, 中山 了1972 年 38 巻 450 号 p. 599-605
発行日: 1972/07/05
公開日: 2009/06/30
ジャーナル フリーThe characteristics of holes machined by a deflected laser beam are investigated theoretically, from the point of view that the variation of beam power profiles caused by the deflection of a beam can be represented by the change of beam spot sizes. The practical applicability of the theoretical results is shown by the experiment on the machining of a thin chromium film with a Q-switched laser oscillated in a single transverse mode. The results obtained are as follows:
1) It is possible to minimize the change of hole diameters with an increase in beam spot sizes by adequately choosing the irradiation condition, which can be obtained theoretically.
2) By removing a focusing lens sufficiently far from the laser cavity, holes with diameter as fine as 5 μm can be machined by the long focus lens suitable to combine with a beam deflector.
3) With respect to the distance from the center to the position at which the hole diameter is almost the same as that at the center, it is the longest when a deflected laser beam has the irradiation power 34 times the threshold one required for machining. This experimental result fairly agrees with the theoretical one.抄録全体を表示PDF形式でダウンロード (3860K) -
井沢 実1972 年 38 巻 450 号 p. 606-613
発行日: 1972/07/05
公開日: 2009/06/30
ジャーナル フリーPDF形式でダウンロード (5592K) -
芝田 光彦, 藤原 晴夫1972 年 38 巻 450 号 p. 614-619
発行日: 1972/07/05
公開日: 2009/06/30
ジャーナル フリーPDF形式でダウンロード (7498K)
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