Journal of The Japan Society for Precision Engineering 

About: Journal of The Japan Society for Precision Engineering is an academic journal. The journal publishes majorly in the area(s): Machining & Grinding. It has an ISSN identifier of 0912-0289. Over the lifetime, 5273 publications have been published receiving 13285 citations. The journal is also known as: Journal of Japan Society of Precision Engineering & Journal of the Japan Society for Precision Engineering.

Optical integrated circuits.

Abstract: 以上, Ti拡散LiNbO3を中心として, 光集積化の特長について述べ, 代表的な導波路材料を含めて具体的な光ICを紹介したこれによって, 光ICの基礎的な概念と最近の研究動向の一端がご理解いただければ幸いである現状は, ようやく実用的なニーズにこたえる光ICが試作される段階に達したところであり, 実際のシステムサイドの要求を満足するには, なお光ICの実装技術を含めて検討すべき問題が残されているしかし, 今や薄膜光導波を基礎とする光IC技術は光エレクトロニクスの分野において不可欠なキーテクノロジーである今後は, 非線形光学効果を用いた光-光制御素子を始めとして, 新しい機能をもつ導波形素子, 光ICの開発に向けてのなお一層の研究の進展が期待される

Precise Positioner Utilizing Rapid Deformations of a Piezoelectric Element

Abstract: This paper describes a new method of precise positioning using piezoelectric elements. The method utilizes the friction force between the object to be moved and the base plane, and the reaction of the inertial force caused by a rapid deformation of a piezoelectric element. The configuration of this positioning mechanism is simple : an element for inertial mass is connected to the object to be moved by a piezoelectric element. Through controlling the rapid deformation of the piezoelectric element, we can control the inertial force, which causes a controlled step-like movement of some nanometers up to some ten-micrometers. Repeating this stepping action, it is possible to move the positioner with a velocity of more than one millimeter per second. Applying a sensor feedback to the mechanism, almost the same resolution and accuracy as the sensor can be achieved in position control. This method of positioning also realizes a remarkably simple 3-axial precise positioning table.

Stability Analysis of Cutting under Varying Spindle Speed

Abstract: The stability of cutting system with periodically varying spindle speed is analyzed by means of functional analysis. The dynamic characteristics of both the machine tool structure and cutting process are considered as the linear operators in Hilbert space and the stability problem of the cutting system is solved as an Eigen value problem of these operators. It is proved that two kinds of beat type vibration exist under the stability limit of the system. The amplitude of these beats changes by the same and twice period as that of the spindle speed variation, respectively. The analytical results show that the maximum amplitude of both types of vibration decrease when the frequency of spindle speed variation increases or when the amplitude of spindle speed variation decreases. The analytical results also show that the stability limit of the system rises up when the amplitude of spindle speed variation increases but it is independent of the frequency of spindle speed variation. Finally the stability of the cutting system containing external random vibration is analyzed by using these results and the results show good agreement with the experimental results.

The mechanics of Three-dimensional Cutting Operations

Abstract: This paper contains the reports of the researches on the most practical three-dimensional cutting. On three-dimensional cutting operation, the effective rake angle αe equivalent to the rake angle α at the orthogonal cutting was determined, also more complex three-dimensional tools were analysed relating to an equivalent oblique tool, which has a cutting edge inclined to the direction of motion of the work.The authors constructed a tool dynamometer for three cutting forces as shown in Fig. 4, and the results of the experiments carried out using the dynamometer are shown in Fig. 6, and present a method for predicting the direction of chip flow in a range of tool geo- metry. The direction of chip flow across the tool face, determines the effective rake angle which in turn affects to the tool life.And the effective rake angle was determined from the results of the experiments, and the cutting forces against the angle also were determined.Treating these results theoretically at the same time, it was cleared up how the chips slide on the tool face, and its maximum side sliding angle θ had an influence on the chip flow angle. The authors therefore obtained the foundation of the practical three-dimentional cutting theory.