[in Japanese]

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The purpose of this study is to evaluate the machining accuracy for high-precise surface texture generation. In basic experiments, measurement and evaluation of metal surface machined in end milling were carried out. The surface of S50C work material was machined by a square end mill, and machining difference was measured using a scanning white interferometer. Simultaneously,principle was clarified, and machining was carried out using the new compensation technique.

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The purpose of this study is improving the accuracy of surface textures. In end mill machining, error arises as a result of tool flexure, and revising machining error margin caused in that case. We develop the system that forecasts amount of fluctuation due to flexure of a tool on end mill machining. For this purpose, we suggested that application method to machining with considering flexure of tool holding parts and so on. In this report, we introduces the outline, the accuracy forecast methodology of the surface texture and forecasted shapes.

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[in Japanese]

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This paper describes the development of the cutting process of pure titanium material using electrolyzed reduced water of dilute sodium chloride instead of the cutting fluid which is not environmentally consciousness. First, as cutting solution, we processed an end milling of titanium material using electrolyzed reduced water and cutting fluids (water-miscible cutting fluid and water-immiscible cutting fluid). Next, we measured the microscopic shape and the surface roughness of the cutting surface, and then analyzed the cleanliness and the chemical composition of the surface layer in the cutting surface. We got the result that electrolyzed reduced water can be applied to the cutting process of pure titanium material as cutting fluid sufficiently.

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[in Japanese]

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Accurate dynamic control of Langevin typed ultrasonic vibrator has been just achieved. In the former report, the fluctuation of the drive current in thestate of resonance was indicated. The reason of the phenomena is clarified in this report and improved successfully. Furthermore, a PWM power supply was prototyped to obtain modulated drive voltage, which enables variable speed of vibration while keeping state of resonance.

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Recently, we have proposed a method of surface acoustic wave excitation and propagation on a glass substrate surface and its application for the ultrasonic motor. Although the motor worked successfully, a detail of driving phenomenon is unclear in the glass substrate ultrasonic motor yet. In this research, to expand the glass substrate motor with any shapes of the stator transducer, we investigated the detail of its driving mechanism.

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[in Japanese]

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Ultrasonic actuators using a mode-coupled vibrator are able to be driven by a single phase power source, and some of them are able to move in both direction with switching driving frequency or driving electrodes. This type of an ultrasonic actuator has flexibility in choosing its shape, so that it is suitable to miniaturize and set up at an intricate space in comparison with mode-rotation type motor and that using degenerate modes of different form. In this paper, some types of an ultrasonic actuator using a mode-coupled vibrator are reported, and their constructions, operating principles and some examples of their performances are described.

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[in Japanese]

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[in Japanese]

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[in Japanese]

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Recently, there is a demand for actuators which can be used in the high magnetic fields. They are used for medical instruments and componential analysis equipments. The aim of this research is the development of a nonmagnetic cylindrical ultrasonic motor that can be used in the high magnetic fields. This motor is used for the rotation of the high-resolution solid-state nuclear magnetic resonance (NMR) analysis. We have fabricated the ultrasonic motor for a solid-state NMR and evaluated the driving performance of this motor. Additionally, we have succeeded in obtaining the ¹H-NMR signal by using this motor under the condition.

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[in Japanese]

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We research self-sensing control of piezoelectric actuators that make compensation for hysteresis characteristics by using linear relation between permittivity change and piezoelectric displacement when it is driven.This research intends to improve accuracy of control. We can improve the accuracy of the sensitivity of detection and positioning of the self-sensing control by enlarging the frequency of the voltage for a permittivity detecting phase.Moreover, in applying this technique, we tried the solution of the creep phenomenon that was a peculiar problem to a piezoelectric actuator.

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Typically, continuous driving voltage is required to maintain the piezoelectricdisplacement. However, the shape memory piezoelectric actuator can keep itspiezoelectric displacement without any operating voltages. In this study, a piezoelectricactuator was operated as a shape memory piezoelectric actuator by asymmetric pulsedvoltage operation. When certain range of asymmetric voltage was applied to thepiezoelectric actuator to switch its polarization, an asymmetric butterfly hysteresis wasobserved. With this result, the piezoelectric strain had two stable values at the point of0 voltages. Then, the actuator realized shape memory by asymmetric pulsed voltageoperation.

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[in Japanese]

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This report deals with an application of a small mobile device, ″AZARASHI (Seal) Mechanism″ to a manipulation device. A manipulation device employed L-shape AZARASHI mechanism for the x, y and theta-motions, and one-DOF Seal mechanism for the z-motion. A glass bead with a diameter of 60-70 um was manipulated with a pair of micro-tweezers. Local Machining Station (LMS) method was expected to improve the positioning performance of the manipulation. The performance for the manipulation based on LMS method was measured.

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In recent years, demands for high-precision machining are increasing in the manufacturing of precision dies and molds, optical parts, and high-precision electrical parts. In such machining, it is a critical issue to minimize the relative position errors between the tool tip and the workpiece, since they are copied to the machined surface. The objective of this research is to investigate a methodology to measure and control relative position errors between the tool tip and workpiece, which is referred to as tool-workpiece closed-loop control. Especially, this paper covers the flat surface machining on XY plane. For this purpose, a three-axis vertical machine with the measuring system was developed. Three linear axes are driven by ball screws. Additionally, for the relative position control, the Z-axis has a fine motion mechanism driven by a piezoelectric actuator. In order to measure the relative displacement, a laser displacement sensor is installed near the cutting tool, and an artifact is installed near the work piece. By using control terminology, this measurement system is referred to as a relative-position observer. By the tool-workpiece full-closed loop control , the straightness errors are reduced to about &pousmn;0.4 μm /90 mm.

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[in Japanese]

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[in Japanese]

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[in Japanese]

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A noncontact transfer device using ultrasonic levitation and flexure traveling wave has some advantage in clean environment and simple device configuration. This report deals with the concept of a two-dimensional transfer device using ultrasonic levitation and fundamental experiments for this device. A one-dimensional transfer device was built and examined as a basis of a two-dimensional transfer device. A prototype of the two-dimensional transfer device with four bolted Langevin transducers was constructed based on the result of the fundamental experiments. Thrust by the flexure traveling wave was observed.

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In recent year, an enlargement of plane substrates and semiconductor wafers advances. The substrates are easier to break, so the development of non-contact transportation is desired. In our research, the substrates are levitated by an aerostatic guideway. Simultaneously, when a stator of handling deice vibrated by standing wave are faced over the substrate with narrow clearance, non-contact holding force is generated between them. In the handling state, the substrate follows the motion of handling device, namely, non-contact transportation of the substrate can be achieved. In this report, performance of the handling device was reported.

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In spite of long-standing effort in manufacturing system developments, a lot of resource waste can be found from a viewpoint of environmental efficiency. For sustainable manufacturing, it is important to visualize resource flow in manufacturing processes, and to identify and evaluate hidden waste, or environmental impacts. Then practical Kaizen methods, such as localization and minimization, can be applied to reconfigure existing systems. A generic modelling framework of resource flow in manufacturing processes and an evaluation procedure for environmental efficiency are proposed. Recycling and reuse processes are considered. Some industrial case studies are shown to validate the proposed method.

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Natural fiber is paid attention as an environmentally superior material. It is known that a bamboo fiber has high strength like a glass fiber. However, it is difficult to extract high quality bamboo fiber using conventional methods such as crushing, shearing, steam explosion, and swelling. Therefore, an extraction method of bamboo fibers end-milled from bamboo using a machining center with in-situ measurement is proposed in the present study. End-milling conditions and tool path was decided based on in-situ measurement result. As a result, it was shown that bamboo fibers with high precision shape could be acquired efficiently.

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[in Japanese]

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This research aims at the development of Part agent system that manages individual parts throughout the life cycle of their products by using technology of network agents. A Part agent promotes the reuse of its corresponding individual part by proposing suitable behavior for maintenance of the part to its user. In this report, a life cycle simulator we have developed for the behavior of individual parts under the control of Part agents is described.

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To construct the sustainable production, authors are proposing Part agent system.This system consisting of network agent and RFID tags attached on parts promotes reuse of parts. For the experiment of Part agent system, authors develop the test environment consisting of RFID, database and distributed computers. This paper reports the result of Part agent′s behavior on this environment and development tasks of Part agent system.

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[in Japanese]

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[in Japanese]

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[in Japanese]

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[in Japanese]

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This research aims at the development of Part agent system that manages individual parts throughout the life cycle of their products by using technology of network agents. A Part agent promotes the reuse of its corresponding individual part by proposing suitable behavior for maintenance of the part to its user. In this report, a tool we have developed for visualizing behavior of individual parts in prototype life cycle simulator is described.

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This paper describes the influence of electrolyzed water dilute NaCl on the surface of industrial pure iron. First, we clarified the etching characteristic of electrolytically-oxidized water and electrolytically-reduced water against the surface of industrial pure iron using HCl solution for comparative immersion experiments. The results show that there is no etching operation on iron produced by electrolytically-reduced water, but electrolytically-oxidized water works well for the etching operation, and if the ORP/pH value of the electrolytically-oxidized water is high, the etching speed becomes correspondingly fast. Next, by the observation of the SEM image, the influence of electrolysis water on the shape of the industrial pure iron surface became clear. The results indicated that electrolyzed water didn't have a big influence on the surface form of industrial pure iron. Lastly, surface analysis revealed that electrolyzed water had no negative influence on the chemical composition of the industrial pure iron surface. The study indicates that electrolytically-reduced water can be utilized in the washing process, and that electrolytically-oxidized water can be applied to the surface treatment and washing of industrial pure iron.

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[in Japanese]

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We have developed a testing machine for evaluating Joule heat induced shape memory behavior in Ti-Ni binary and Ti-Ni-X ternary alloy system thin films prepared by sputtering. The apparatus can apply a constant tensile stress to the specimen and measure the change of the strain of the specimen induced by Joule′s heating. It was confirmed that the films having higher Ms temperature and/or narrower transformation hysteresis showed faster actuation response.

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[in Japanese]

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[in Japanese]

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[in Japanese]

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[in Japanese]

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