Language：English   Publishing type：Research paper (scientific journal)  

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Language：Japanese   Publishing type：Research paper (scientific journal)  

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Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：The Japan Society of Mechanical Engineers  

<p>Diamond cutting tools shows severe wear in turning of steels. In previous paper, it was shown that carbides on ferrite phase, which were precipitated by carburization, suppressed the diamond tool wear. In this paper, detailed distribution of constituents of the carbides was analyzed by EDS (energy-dispersive X-ray spectroscopy). In addition, characteristics of each carbide such as occupancy, diameter, and degree of circularity were measured. Results indicate that those characteristics of the carbides influence suppression of the tool wear.</p>

DOI： 10.1299/transjsme.17-00161

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：Springer Science and Business Media LLC  

DOI： 10.1186/s40648-017-0093-3

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Other Link： http://link.springer.com/article/10.1186/s40648-017-0093-3/fulltext.html

Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：The Japan Society for Precision Engineering  

Recently, demands have increased on fabricating complex and accurate structures by ultra-precision cutting. However, the machinability is influenced by crystallographic orientations in micron/submicron cutting. In our past work, it was clear that the crystal anisotropy affected the elastic recovery in submicron groove cutting of single crystal copper. Before the experiments, three-step cutting, i.e., rough cutting, intermediate cutting, and finish cutting, have been employed to flattening single crystal copper surface. The depth of affected layer was thinned by increasing the number of intermediate and finish cutting. Nevertheless, few microns of affected layer remained on finished surface. The rough cutting step is considered to cause the remaining affected layer. In this paper, we have investigated the effect of cutting conditions of the rough cutting step to reduce the depth of affected layer. The Schmidt factor of each slip system was calculated from measured cutting forces. Results suggest that the slip system and its Schmidt factor may explain the machinability, and results indicate that the thickness of affected layer decrease with an increase in cutting speed.

DOI： 10.2493/jjspe.83.967

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：Fuji Technology Press  

In planarization processes of sapphire, lapping process takes a long time because sapphire is a hard material. In contrast, superfinishing, which involves fixed abrasive machining, can substitute for lapping, and it would be possible to shorten the amount of processing time. In this work, vitrified-bonded diamond superabrasive stones with different grain diameters are developed. Then, multistage superfinishing is investigated by combining these stones. Results indicate that the multistage process is capable of producing a 2 nmRa surface, equivalent of a lapped surface in less than 10 min. To improve the process of multistage superfinishing, a removal amount estimation method is developed based on the real contact pressure calculation. The working area ratio of the stone was calculated by considering elastic deformation during superfinishing. The contact ratio of sapphire is calculated considering the roughness of the pre-finished surface and grain depth of cut. Accordingly, the real contact pressure is calculated to estimate the removal amount during superfinishing and finished surface roughness was expected.

DOI： 10.20965/ijat.2017.p0742

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：Institute of Electrical Engineers of Japan  

This paper describes an improved particle-excitation flow-control valve with high flow rate and controllability. The proposed control valve has a small volume, is lightweight, and can smoothly control the airflow through particle excitation. Pneumatic actuators, which have many advantages, are widely used in automation machine equipment and are expected to be used in robots. In general, such highly controllable pneumatic-control devices used as proportional valves are large-scale, heavy, and exhibit low response. We have developed a new flow-control valve called a particle-excitation flow-control valve, which has a simple structure with a lead zirconium titanate (PZT) resonance mode, large control-flow rate, and is lightweight. Further, this valve is expected to be highly responsive because it is driven by a PZT vibrator. In this study, we designed an experimental prototype to increase the maximum flow rate and measured its flow control and response characteristics. Moreover, we showed that this control valve has high controllability and control flow rate.

DOI： 10.1541/ieejsmas.137.32

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Language：Japanese   Publishing type：Research paper (scientific journal)  

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：Trans Tech Publications Ltd  

A pressure sensor is developed to explain the finishing mechanism in centrifugal disc finishing. The distributions of the flow pressure of mass in the radial direction and the height direction of the barrel are investigated. The flow pressure of mass is higher in the lower layer near the disc than in the upper layer, regardless of the finishing conditions. In the upper layer of the mass and near the side wall of the barrel, the flow pressure of the mass of the wet process is higher than that of the dry process. However, the stock removal of the dry process is larger than that of the wet process.

DOI： 10.4028/www.scientific.net/AMR.1017.559

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Language：Japanese   Publishing type：Research paper (scientific journal)  

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Language：Japanese   Publishing type：Research paper (scientific journal)  

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Authorship：Lead author   Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：The Japan Society for Abrasive Technology  

Our goal is the development of a design system for mechanochemical superabrasive stones containing both cBN and CeO₂ abrasives. As the first step, we have already developed a morphological structure model for the stone using fractal modeling techniques. As the second step, this paper describes the surface topography model for the stone. We have already proposed a surface topography model for the stone containing only cBN grains. This model can describe the surface topography with the same fractal dimension of grain distribution as the morphological structure model. Therefore, we have improved the model by preparation of the describing parameters for each grain and the changes in these parameters through the describing algorithm. As a result, the model bears resemblance to the real stone in topography and fractal dimension in each grain of the topography model is approximately equal to the morphological structure model.

DOI： 10.11420/jsat.57.453

CiNii Books

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Other Link： https://jlc.jst.go.jp/DN/JALC/10021320100?from=CiNii

Language：English   Publishing type：Research paper (international conference proceedings)  

In this paper, we investigated the super finishing performance of bearing steel with vitrified bonded mechanochemical stone composed of CeO2 abrasives, which can act as oxidizing agents. Superfinishing experiments showed that finishing mechanism of CeO2 stones changed when superfinishing pressures exceeded boundary. On the basis of this finding, superfinishing performance of CeO2 stones of three grades, i.e. I, T, and X, were evaluated through the superfinishing of bearing steels. Experiments showed that CeO2 stone of grade I is superior in surface finish to other two grades because of the mechanical action of the crushed bonds.

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Language：English   Publishing type：Research paper (international conference proceedings)  

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Authorship：Lead author   Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：The Japan Society for Abrasive Technology  

Our goal is to develop a design system for mechanochemical superabrasive stone containing both cBN and CeO<SUB>2 </SUB>abrasives. As the first step of development, this paper describes the morphological structure model for the stone using fractal-modeling techniques. We have proposed two models to represent the conventional stone structure: the "agglomerate model of a plastic mixture" on the basis of the diffusion-limited aggregation algorithm and the "morphological model of a burnt stone" on the basis of the sandpile algorithm. In consideration of the characteristics of the mechanochemical stone, we have improved these models by adding the following procedures: the "cluster formation" algorithm and the "judgment of a bonded grain" algorithm. Both models bear resemblance to real wheels in the spatial distributions of both grains and the fractal dimensions in each grain of the real stone are approximately equivalent to those of the models.

DOI： 10.11420/jsat.54.557

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：TECHNISCHE RUNDSCHAU EDITION COLIBRI LTD  

An appropriate phosphorous addition to electroless nickel deposits remarkably reduces tool wear in diamond turning. To understand the wear suppression mechanism of phosphorous addition, erosion tests simulating tool wear process and ab initio molecular dynamics calculations of interactions between diamond and Ni-P and Ni are carried out. The erosion tests show that carbon diffusion into the workpiece is reduced, and the ab initio calculations suggest that dissociation of carbon atoms on diamond surface due to the interaction with the workpiece is reduced. The results suggest that another possible additive to suppress tool wear can be found by the method proposed. (C) 2010 CIRP.

DOI： 10.1016/j.cirp.2010.03.058

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：ELSEVIER SCIENCE INC  

This paper describes a newly developed mechanochemical superabrasive stone containing reactive BaSO4 abrasive. A thermodynamic analysis suggested that BaSO4 reacts with Fe forming oxides. X-ray diffraction patterns revealed that scales that cover steels heated with BaSO4 abrasive consist of Fe3O4, alpha-Fe and BaS. On the basis of these results, vitrified diamond stones containing BaSO4 abrasive were manufactured and the effect of the BaSO4 abrasive on their performances was evaluated through the superfinishing of bearing steels. It was found that soft BaSO4 abrasive rubs the surface of hardened steel producing smooth surfaces with valleys. The stone reduces both the hardened layer depth and the compressive residual stress in the finished surface because of the formation of a thin white layer. The addition of BaSO4 abrasive improves the wear resistance of diamond stone because the dominant wear mechanism changes from carbon diffusion to oxidization of diamond. (C) 2009 Elsevier Inc. All rights reserved.

DOI： 10.1016/j.precisioneng.2009.12.004

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Language：Japanese   Publishing type：Research paper (scientific journal)  

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Language：Japanese   Publishing type：Research paper (scientific journal)  

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Language：English   Publishing type：Research paper (bulletin of university, research institution)  

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Language：English   Publishing type：Research paper (international conference proceedings)   Publisher：SPRINGER-VERLAG LONDON LTD  

This paper describes the application of prototype of the AFLEF to a peg-in hole task. This AFLEF is an active fixture and can fix any hole-work and position the fixed work at short range. We have combined the prototype of it and a 1-DOF inserting device with the RCC device into a new assembly system for such assembly task as a peg-in-hole task. However, there are two problems to realize this task. One is the "incomplete contact condition," and another is the modification of location of a hole-work to the insertion point. In this paper, in order to solve the former, the AFLEF has been newly equipped with two touch sensors to judge the contact condition and it can modify the contact condition to the complete contact. Moreover, in order to solve the latter, we propose the modification method without any vision sensor. In order to confirm the effectiveness of our proposing modifications of the contact condition and the hole-work&apos;s location, we have tried a peg-in-hole task with the assembly unit. As a result of this trial, although it took a little long time to finish a task, a task has been realized without failure.

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Language：English   Publishing type：Research paper (international conference proceedings)  

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：ELSEVIER SCIENCE INC  

This paper describes a new polishing method for diamond cutting tools. The method is based on the principle of oxidization of copper and deoxidization of copper oxide by carbon. A diamond tool was brought into contact with a copper plate, heated in air to a range of 323-523 K. The depth of the removed layer of diamond increased almost linearly with contact time and reached approximately 7 nm after 6 h. In this erosion process, pre-existing microcracks on the diamond surface were reduced. In comparison with the mechanically polished tool, the thermo-chemically polished tool was highly resistant to chipping and yielded a significant rise in tool life. (C) 2009 Elsevier Inc. All rights reserved.

DOI： 10.1016/j.precisioneng.2009.01.004

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Authorship：Lead author   Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：The Japan Society for Precision Engineering  

The "active flexible fixture (AFLEF)" on plane level is an active and practical fixture, which can fix any work rigidly and position the fixed work at a few millimeters to correct the position error after gripping on plane level. This paper describes the application of the AFLEF to an assembly. We have combined the AFLEF and a 1-DOF inserting device with the RCC device, which controls a peg only to go down vertically, into a new assembly system for the assembly. However, there are two problems to realize it. One problem is the modification of the "incomplete contact" to the "complete contact" between a polygonal work and each contact-tip of the AFLEF. When four contact-tips of it grip the work, it is very rare that the plane contact is complete at all contact positions because of a rubber-slab and a free joint in the contact-tip. In this paper, we present the modification by using two touch sensors equipped each contact-tip with at both ends of it. Another problem is the method of positioning of a hole-work to the insertion point. Generally, the work is controlled with feedback from position sensor like vision sensor. However, we propose another method needing no vision sensor and taking advantage of the characteristic of the AFLEF in this paper. Therefore, in order to confirm the effectiveness of our proposing modifications of the contact condition and the holework's position, we have tried a peg-in-hole task with the assembly system at twenty times. As results of these trials, although it took a little long time to finish a task, all trials have been realized without failure.

DOI： 10.2493/jjspe.75.1134

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Language：Japanese   Publishing type：Research paper (scientific journal)  

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Language：English   Publishing type：Research paper (bulletin of university, research institution)  

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Authorship：Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：ELSEVIER SCIENCE INC  

One of the effective methods for obtaining an ultra-precision surface is utilization of the mechanochemical reaction that occurs at the interface between a tool and a workpiece. A thermodynamic analysis suggested that cerium oxide CeO(2) in contact with steel oxidizes the steel surface. Then, steel specimens embedded in CeO(2) powder were heated to 773 K in a vacuum, and their surfaces were closely analyzed by X-ray diffractometry. As a result, peaks of Fe(3)O(4) together with alpha-Fe were recognized by their diffraction patterns. On the basis of this finding, vitrified superabrasive stones containing CeO(2), i.e., cBN/CeO(2) stones, were made and their performances were evaluated through the superfinishing of bearing steels. Experiments showed that cBN/CeO(2) stone is superior in surface finish to conventional cBN stone because of the synergistic effect of the mechanical action of the cBN abrasive and chemical action of the CeO(2) abrasive. (c) 2008 Elsevier Inc. All rights reserved.

DOI： 10.1016/j.precisioneng.2008.03.005

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This paper describes a newly developed mechanochemical superabrasive stone containing CeO2 abrasive. The effect of CeO2 abrasive on their performances was evaluated through the superfinishing of optical glass. It was found that soft CeO2 abrasive rubs the surface of optical glass producing smooth surfaces with fewer scratches than diamond abrasive. The addition of CeO2 abrasive improves the surface integrity of optical glass because it reduces production of scratches by diamond abrasive.

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Authorship：Corresponding author   Language：Japanese   Publishing type：Research paper (scientific journal)  

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Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：ELSEVIER SCIENCE INC  

Diamond tools become severely worn when machining Ni-P plating materials. Tool life monitoring is therefore essential to avoid the deterioration of workpiece quality. In this paper, in order to better detect tool life while the tools are in use, detailed investigations of the cutting force and acoustic emission (AE) measured during diamond turning process have been made. The results of this tool-life testing show that the cutting force and AE supply valuable information on tool failure; the dynamic component of the thrust force fluctuates chaotically when the tool dulls. This phenomenon can be detected using the 1/f(beta) power spectrum with a spectral exponent of beta &gt; 1. On the other hand, the AE amplitude a tends to rise just when chipping occurs on the cutting edge. This feature can be detected by the amplitude distribution spectrum, in which the AE event rate follows the power law a(-m) with a scaling exponent of m &lt; 2. Therefore, we can conclude that a spectral exponent of beta &gt; 1 and a scaling exponent of m &lt; 2 can be used as the criteria to gauge tool life, because it was observed at the end of the tool life -that tool comer had become wom out and that chipping had occurred on the cutting edge. (c) 2006 Elsevier Inc. All rights reserved.

DOI： 10.1016/j.precisioneng.2006.07.002

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Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：ELSEVIER SCIENCE INC  

Our goal is the development of the morphological model faithfully representing the structure of a real vitrified-bonded wheel in order to determine the wheel structure to meet a required wheel grade and derive the wheel composition to form such a wheel structure. This paper describes the two and new morphological model for a vitrified-bonded wheel using fractal modeling techniques. One model is the "agglomerate model of a plastic mixture" representing a plastic mixture before the burning process of a wheel on the basis of the diffusion-limited aggregation algorithm and another is the "morphological model of a burnt wheel" representing the structure of the burnt wheel on the basis of the sandpile algorithm. Both models bear resemblances to the real productions in structure. In particular, the morphological model of a burnt wheel bears resemblances not only in morphology but also in bulk density to real wheel structure, and it provides the structural characteristics such as average grain spacing and number of bond bridges per grain that relate to the tensile strength of wheels. Therefore, our models play an important role in the development of new wheels. (c) 2006 Elsevier Inc. All rights reserved.

DOI： 10.1016/j.precisioneng.2006.02.003

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Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：Japan Society of Mechanical Engineers  

A geometric modeling technique of the complex vitrified superabrasive stone surfaces has been developed for the purpose of describing their topographies with desired characteristics. It is based on the generating algorithms for random fractals, such as midpoint displacement and successive random additions, and yields a three-dimensional topographic map of the stone surface. Comparisons between the simulated topographic map and the measured one show a good match
the spatial distribution of abrasives on both the stone surfaces exhibits a fractal structure, indicating that the simulated stone surface is a good representation of the real one. Therefore, the computer modeling could be used advantageously when the designer makes drawings of stone surfaces.

DOI： 10.1299/kikaic.73.2381

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Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：ELSEVIER SCIENCE BV  

The wide scattering in tool life of natural mono-crystalline diamond tools is considered to depend on intrinsic crystalline defects due to nitrogen impurities in raw diamond. In this paper, the correlation was investigated between the amounts and types of the impurity evaluated by infrared absorption (IRA) and the crater wear and chipping resistances. As a result, diamonds including less total amount of impurity show larger wear resistance and that with larger amount of B2-aggregates show larger chipping resistance. This suggests that the inspection by IRA can be a useful method for screening of raw diamond for highly durable cutting tools.

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Authorship：Lead author   Language：Japanese   Publishing type：Research paper (scientific journal)  

CiNii Books

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Language：English   Publishing type：Research paper (international conference proceedings)  

This paper describes a new polishing method for diamond cutting tools. It is based on the principle of oxidization of copper and deoxidization of copper oxide by diamond. Practically speaking, a diamond tool is brought into contact with copper plates heated to a temperature range from 323 K to 523 K in air. The wear amount of the diamond increased almost exponentially with contact time and reached about 30 nm after 6 hours. In this erosion process, pre-existing microcracks on the diamond surface were eliminated. Accordingly, the thermo-chemically polished tool is highly resistant to chipping and yields a remarkable rise in tool life compared to the mechanically polished one.

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Authorship：Lead author   Language：Japanese   Publishing type：Research paper (scientific journal)  

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Authorship：Lead author   Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：砥粒加工学会  

CiNii Books

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：TECHNISCHE RUNDSCHAU EDITION COLIBRI LTD  

This paper investigates the mechanism of cutting edge chipping in diamond turning of copper in terms of the change in Hertzian strength of diamond specimens subjected to thermal histories. The study suggests that the strength of diamond decreases as the result of the propagation of existing surface micro cracks caused by the thermo-chemical erosion of oxygen at the crack tips. The catalytic reaction involving copper is also shown to accelerate the crack propagation. Then, a cutting technique of reduced oxygen atmosphere is proposed to suppress the cutting edge chipping in diamond turning of copper over an extended cutting time.

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Language：Japanese   Publishing type：Research paper (scientific journal)  

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Authorship：Lead author   Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：The Japan Society for Precision Engineering  

This paper describes the evaluation of machining performance for the developed micro multi-edged tool and a prototype of new cutting device by using it for plane machining. This tool is like a grinding stone and consists of micro pyramidal hillocks, which are about a few hundred nanometers tall and formed on the wet anisotropic etching in the silicon fabrication process. Though it is expected to machine aluminum alloy, glass and so on, there is a problem that is the requirement of surface contact between a material and the tool in plane machining. The developed prototype of cutting device is equipped with a new mechanism to solve this problem. In the plane machining of Al-Mg alloy by using this device, the cutting performance of micro multi-edged tool has been evaluated and it has become clear that the tool has the machining performance as well as superfinishing by using an grinding stone with superfine grains.

DOI： 10.2493/jspe.70.1276

CiNii Books

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Authorship：Lead author   Language：Japanese   Publishing type：Research paper (scientific journal)  

This paper proposes a micro multi-edged tool made of silicon as a new tool in the micro/nano-cutting and the decision system of fabricating conditions to the tool. This new tool is expected to machine a softer material, like aluminum alloy, glass and so on, than iron because silicon is as hard as alloy tool steel and high speed tool steel. On this new tool, the pyramidal etch hillocks on Si (100) surfaces etched in aqueous KOH solution function as cutting edges because the shape and distribution of the hillocks are resemble to those of the cutting edges on grinding wheel surfaces. The multi-edged tool can be fabricated at the desire of user by only adjusting the etching conditions suitably because the topography of hillocks depends on them. Therefore, we have developed the decision system of the etching conditions corresponding to a specified tool. In this system, the genetic algorithms and the neural network model are applied and the suitable etching conditions; - temperature, concentration and time - are output corresponding to the inputs of average height and number of the hillocks. In this paper, the system is proved fit for practical use as the result of experiments.

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：TECHNISCHE RUNDSCHAU EDITION COLIBRI LTD  

To understand the wear mechanism of diamond tool in machining of ferrous metals, an erosion test simulating wear process and ab-initio molecular orbital calculation are carried out. The results of the tests and analyses show that the essential wear mechanism at the temperature higher than 1000K is the dissociation of carbon atoms on diamond surface due to the interaction with iron surface. The wear rate is controlled by the removal rate of dissociated carbon atoms from the tool-work interface such as diffusion into workpiece. At the temperature lower than 900K, the mechanism involves the removal of carbon atoms due to oxidization of diamond accompanied with deoxidization of iron oxide.

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Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：The Japan Society for Precision Engineering  

A practical and reliable technique is essential for monitoring the tool wear and predicting the tool life in automated diamond turning processes. For the purpose of developing such technique, features of the cutting force are investigated, which are closely related to the tool wear. When turning coppers, the notch wear that causes a fracture of the diamond tool corner grows on the rake face as well as the growth of crater wear. The ratio of the thrust force to the principal force rises gradually as the face wear progresses, and rises extremely just as the tool corner is fractured. The dynamic component of the cutting force fluctuates randomly during the mirror-like surface finishing accompanied with the face wear. However, it changes into chaotic fluctuation by the occurrence of the chipping or fracture. The change from random to chaos in the dynamic component can be clearly known from the 1/&fnof;^β power spectrum of the cutting force. That is, the failure of the cutting edge makes the spectral exponent β large as compared with the face wear.

DOI： 10.2493/jspe.70.661

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Authorship：Lead author   Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：The Japan Society of Mechanical Engineers  

This paper presents a new and effective assembly model by using a fixture with passive RCC function. Previously, in a peg-in-hole task, such functions for skillful assembly as RCC, contact force sensing and so on have been supplied to a ”peg-device” like a hand-manipulator, not a ”hole-device” like a fixture. Therefore the characteristics of a fixture with passive RCC function in this task is investigated in this paper. The peg-in-hole task model by using the ”RCC fixture” is constructed on vertical (x-z) plane. And the performance of this task is investigated by the quasi-static analysis, which was proposed by Whitney, to evaluate the characteristics of it. From the results of the analysis, it has been made clear that the RCC fixture has shown the insertion behavior unlike conventional RCC applied to a peg near the entrance of hole.

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Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：The Japan Society of Mechanical Engineers  

Various models are considered for the generation of the ground surface topography to predict the surface texture of workpieces in terms of the wheel topography. Both topographies of ground surface and wheel surface exhibit the self-similar structure and can be quantitatively characterized by the fractal dimension, so that the mathematical model can be built based on the empirical results by using the group method of data handling. Again, since it is possible to represent the self-similar wheel surface topography by a probability function which gives the fractional Brownian motion, a method of simulating the generation of the ground surface texture with the artificial wheel surface is proposed.

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Authorship：Lead author   Language：Japanese   Publishing type：Research paper (scientific journal)  

Machining sounds has been told to be effective for monitoring of cutting tool conditions, but it has been difficult to avoid misunderstanding of the conditions in previous systems. There are two main causes. First, the peculiar sound to a condition dose not emanate continuously and an unexpected sound emanates occasionally. Secondly, in case of tool wear, the small difference between normal tool and tool wear makes the recognition of the wear hard. We propose the HSP (Hexadecimal Spectrum Pattern) as the definite expression of the spectrum patterns in this paper. And we also propose the new monitoring system by using the frequency of sound, which is applied by neural network, because we consider that the emanating time of the peculiar sound is as important as the spectrum pattern of it to recognize the condition exactly. In this system, cutting tool conditions, like normal, wear and fracturing, can be monitored without misunderstanding under a few cutting conditions. © 2002, The Japan Society of Mechanical Engineers. All rights reserved.

DOI： 10.1299/kikaic.68.1251

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Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：The Japan Society of Mechanical Engineers  

When aluminum single crystals are machined at the depth of cut less than a grain size, th surface integrity varies with the machined crystallographic orientations. In the paper, the surfac integrity produced by facing the Al-Mg alloy disks with crystallographic texture is described. The residual stress in the faced surface layer results in the inequality, because the scratch strength of Al Mg alloy is anisotropic. From the determination of the Lyapunov exponent and correlation dimension of the measuring profile, the following statement can be made. The faced surface assumes the chaotic character that depends largely on the anisotropy of the strength. Besides, the faced surface has a non uniform self-similarity. Furthermore, the surface roughness is different in localities.

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Language：Japanese   Publishing type：Research paper (scientific journal)  

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Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：The Japan Society for Precision Engineering  

This paper illustrates an integrated design procedure for quantifying the manufacturing parameters of the porous super-finishing stone which complies with the specified cutting performance. The outline is as follows. After a stone hardness and a preliminary drawing of stone topography which can be produced by the computer graphics called ”fractional Brownian motion” are assumed, the cutting performance is estimated from mathematical models. Such analysis reveals whether the topography and hardness of the stone are optimal or not. If the design fails, these steps are iterated. To find an optimized solution, genetic algorithms have been applied to the iterative design process. The developed GA-based design tool is called SUSDIN (Superfinishing Stone Design Inventor), and has proved fit for practical use as the result of experiments.

DOI： 10.2493/jjspe.67.428

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Authorship：Lead author   Language：Japanese   Publishing type：Research paper (scientific journal)  

This research is a thing for the purpose of the development of the system which decides the production schedule of the grinding wheels of the typical multiple kind small quantity production forms suitably. SA method, which is one of meta-hyuristhics, was applied to both mixing process and baking process as an objective function for the maximization of the production efficiency with the satisfaction to a restriction on the kind of the wheels and size and the production facilities. Then, the matter that it had the most suitable production schedule looked for in each process was cleared as a result of this simulation.

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Language：Japanese   Publishing type：Research paper (scientific journal)  

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Language：Japanese   Publishing type：Research paper (scientific journal)  

The decision of 5 factor of the grinding wheels depends on technician's experiential knowledge greatly, and that decision process isn't being structuralized, either. So a method to deal with the design process is being looked for based on the definite engineering and the algorithm. It was examined about the new way of designing it which 5 factor of the wheel was decided as in accordance with the algorithm which made the process that a protein was synthesized. The validity of this algorithm was admitted as a result examined about the design answer that a built design system was carried out and which could get it.

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Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：The Japan Society for Precision Engineering  

Mirror-like surfaces obtained by the ultra-precision turning using diamond cutting tools are smooth to the eye, but rough under a microscope. Although a lot of work has been done on the roughness of the mirror-finished surface, its inhomogeneous static structure is not yet well analyzed. This has led to attempt to discuss quantitatively whether the surface texture was indeed chaotic or not. In the paper, the trajectory on the attractor reconstructed in phase space from a measured surface profile was characterized by the Lyapunov exponent and the correlation dimension. The characterization shows that the mirror-finished surface has the strange attractor, the positive Lyapunov exponent and the finite correlation dimension and hence it has the chaotic characteristics. Further, the mirror-finished surface produced by the ultra-precision turning becomes more chaotic as the feed rate and the cutting speed decrease.

DOI： 10.2493/jjspe.64.1196

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Other Link： https://jlc.jst.go.jp/DN/JALC/00054658165?from=CiNii

Language：Japanese   Publishing type：Research paper (scientific journal)  

This study has been done for the purpose of understanding the mechanism by which the grinding wheel topographies are formed. The irregularity of distribution of grain tips over the wheel surface and the complexity of their morphology can be characterized by the fractal dimensions. Therefore, it was investigated how the fractal dimensions correlated with the dressing parameters and the composition and properties of wheel themselves. Based on the experimental data, the models adequate to describe the mechanisms were built by the technique, which is called ”group method of data handling”. On the basis of the obtained models, the following conclusions could be drawn. (1) The dressing at bigger depth of cut on the harder-grade and more open wheel results in the increased morphological complexity of grain tips. (2) The finer dressing on the denser wheel results in the decreased irregularity of grain distribution.

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Authorship：Last author   Language：Japanese   Publishing type：Research paper (scientific journal)  

This paper describes piezoelectric force sensor of a placement system for surface mount devices. Electric charge of the piezoelectric sensor was converted into voltage signal with charge amplifier. And then, in the developed method, a satisfactory measurement of the chip placement force was accomplished by compensation for the voltage signal. This compensation was based on an integral compensation for a transfer function of the charge amplifier. As a result, an effectuality of piezoelectric devices for mount force sensor was confirmed. And the endurance tests were put into practice. The result of the test was that well endurance characteristic was confirmed.

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Language：Japanese   Publishing type：Research paper (scientific journal)  

A proper characterization of the topography of grinding wheel surface is very important for understanding grinding performances. The wheel topography which is comprised of the spatial distribution of abrasive grains over the wheel surface and their morphology suggests a fractal structure. Then fractal geometry which can produce a numerical description of an indescribably rugged surface was applied to characterize such a geometrical structure. It has quantitatively been evidenced by measured fractal dimensions that both the complexity of morphology of cutting edges and the irregularity of their distribution increase through dressing process. However, it has been indicated that the complexity of cutting edge's morphology decreases by wheel wears, such as attritious wear and grain fracture.

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Authorship：Corresponding author   Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：The Japan Society for Precision Engineering  

This paper presents a new high speed and high precision NC-lathe for machining a piston-head of a reciprocating engine. In the machining of a piston-head, a cutting tool positioning servomechanism is needed, because the machining of a piston-head is the non-circular machining, in which the stroke of the cutting tool positioning is 0.1-0.5 mm. Previously a new servomechanism actuated by electromagnetic attractive force was developed as a cutting tool positioning mechanism. But a prototype of this servomechanism did not make a high speed non-circular machining possible, as the response performance was not at a satisfactory level. Thus, to enhance the response performance, the prototype has been redesigned with the use of some plate springs, the decrease in mass, the restraint of eddy-current loss and so on. Also the periodic learning control method with the inverse transfer function compensation has been applied to the positioning control for the high accurate positioning. These modifications lead the developed NC-lathe for a piston-head to the achievement of practical machining with an accuracy of 2 ┣T00300┫m at 3000 rpm.

DOI： 10.2493/jjspe.62.453

CiNii Books

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Other Link： https://jlc.jst.go.jp/DN/JALC/00038597688?from=CiNii

Authorship：Lead author   Language：Japanese   Publishing type：Research paper (scientific journal)  

This paper presents a new automatic 3D-measuring system, using a developed three-dimensional coordinate measuring machine (3D-CMM) by two image processors (a CCD camera and laser microscope) and a workstation (WS), for the dimensional inspection during the production of small molded electronic parts. Generally, in the measurement of small molded electronic parts, a 3D-CMM by an image processor (CCD camera) is rather suitable than a 3D-CMM by a probe, because a probe may damage some portions and unable to enter narrow spaces. But it is less accurate in vertical direction than it is length and breadth directions. Also it takes much time to make a measuring program. So it is difficult for the system using only a 3D-CMM by an image processor to shorten the process time of the dimensional inspection. At this stand point, in the developed system, a confocal scanning laser microscope and a WS are appended to a 3D-CMM by an image processor to get the required vertical direction accuracy and to save the process time as much as possible. The former ensures the vertical accuracy, and the latter shortens the process time 45% than the previous one.

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Authorship：Corresponding author   Language：Japanese   Publishing type：Research paper (scientific journal)  

This paper presents a new high speed positioning servomechanism in order to machine an article with a non-circular profile. In the non-circular machining by a lathe, the positioning servomechanism of a cutting toll is necessary, and, in order to operate it with high efficiency, this positioning servomechanism must have the enough force to overwhelm cutting resistance and have a good responsiveness. Previously an electrohydraulic servomechanism was applied to the cutting tool positioning mechanism and the high efficient non-circular machining was realized. But there were some problems, such as the maintenance of oil, a noise, and so on in this mechanism. And so a new high speed and high power positioning servomechanism was developed. This new servomechanism is actuated by electromagnetic attractive force in the same as a support mechanism by an active magnetic bearing. Usual mechanical springs were incorporated into the fundamental servomechanism by the electromagnetic attractive force to achieve the high responsiveness on the lower electric power, and the new servomechanism was developed to make the high responsiveness on practical electric power possible.

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Authorship：Corresponding author   Language：Japanese   Publishing type：Research paper (scientific journal)  

This paper presents a high speed non-circular machining NC-lathe for cutting a piston-head of a reciprocating engine. In the non-circular machining, it is indispensable for a cutting tool to reciprocate in phase with the rotation of the main spindle. This cutting tool positioning mechanism needs high frequency response and high power. So an electro-hydraulic servomechanism was applied to the positioning mechanism, and the non-circular machining NC-lathe was developed. The machining of a piston-head needs higher speed cutting, and so the positioning servomechanism needs higher frequency response because the mass of the cutting tool and the base is too heavy. So the lightening of the mass and the frequency response possible, and the high speed non-circular machining NC-lathe has been newly developed for machining of a piston-head.

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Authorship：Corresponding author   Language：Japanese   Publishing type：Research paper (scientific journal)  

This paper describes a newly developed lathe for machining numerical non-circular profile article with high accuracy and high efficiency. In general, the machining of non-circular profile articles, such as camshafts and rotary engines, has conventionally been carried out by means of a copying lathe. This method sets upper bounds to machining speed owing to mechanical factors. In order to machine a non-circular profile object by a lathe with high efficiency, a lathe has been developed whose the cutting tool is positioned in-phase with the rotation of the spindle by the use of an electro-hydraulic servo-mechanism controlled numerically. When the speed of the spindle is increased to improve machining efficiency, the positioning of the cutting tool tends to become out of phase with the rotation owing to the delay caused in the servo-system. The inverse transfer function compensation, which is a kind of feed-forward control, has been applied to the system in order to overcome the problem of the delay. And application of this compensation has enabled improvement in positioning accuracy of ┣T00010┫0.5 mm to ┣T00010┫0.1 mm at a spindle rotation of 180 rpm. This result and some examples of the products machined by the developed lathe are shown in the paper.

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Authorship：Corresponding author   Language：Japanese   Publishing type：Research paper (scientific journal)  

The machining of an object into a non-circular outline has conventionally been carried out by means of a copying lathe. This method, though reproducible, is time-consuming and necessitates the preparation of a model to be copied. The authors, with a view to improving efficiency and diversity of non-circular machining, have developed a lathe incorporating an electro-hydraulic servomechanism for positioning the cutting tool in-phase with the rotation of the work. When the rotation of work is increased to improve efficiency, the positioning of the cutting tool tends to become out of phase with rotation owing to the delay caused in the servo-system. The authors have applied periodic learning control method and inverse transfer function compensation to the system, and thus achieved a notable improvement of accurate high-speed positioning for an electro-hydraulic servo-system.

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Language：Japanese   Publishing type：Article, review, commentary, editorial, etc. (bulletin of university, research institution)  

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Language：Japanese   Publishing type：Article, review, commentary, editorial, etc. (bulletin of university, research institution)  

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Language：Japanese   Publishing type：Article, review, commentary, editorial, etc. (bulletin of university, research institution)   Publisher：Kansai University  

CiNii Books

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Other Link： http://hdl.handle.net/10112/951

Language：Japanese   Publishing type：Article, review, commentary, editorial, etc. (bulletin of university, research institution)  

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Authorship：Lead author   Language：Japanese   Publishing type：Internal/External technical report, pre-print, etc.  

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Authorship：Corresponding author   Language：Japanese   Publishing type：Internal/External technical report, pre-print, etc.  

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Authorship：Corresponding author   Language：Japanese   Publishing type：Internal/External technical report, pre-print, etc.  

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Authorship：Corresponding author   Language：Japanese   Publishing type：Article, review, commentary, editorial, etc. (bulletin of university, research institution)  

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Authorship：Lead author   Language：Japanese   Publishing type：Internal/External technical report, pre-print, etc.  

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Authorship：Corresponding author   Language：Japanese   Publishing type：Internal/External technical report, pre-print, etc.  

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Authorship：Corresponding author   Language：Japanese   Publishing type：Internal/External technical report, pre-print, etc.  

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Language：Japanese   Publishing type：Article, review, commentary, editorial, etc. (bulletin of university, research institution)  

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Authorship：Lead author   Language：Japanese   Publishing type：Internal/External technical report, pre-print, etc.  

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Authorship：Corresponding author   Language：Japanese   Publishing type：Internal/External technical report, pre-print, etc.  

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Authorship：Lead author   Language：Japanese   Publishing type：Internal/External technical report, pre-print, etc.  

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Authorship：Lead author   Language：Japanese   Publishing type：Internal/External technical report, pre-print, etc.  

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Authorship：Corresponding author   Language：Japanese   Publishing type：Internal/External technical report, pre-print, etc.  

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Language：Japanese   Publishing type：Article, review, commentary, editorial, etc. (bulletin of university, research institution)  

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Authorship：Lead author   Language：Japanese   Publishing type：Internal/External technical report, pre-print, etc.  

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Language：Japanese   Publishing type：Article, review, commentary, editorial, etc. (bulletin of university, research institution)  

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Authorship：Lead author   Language：Japanese   Publishing type：Article, review, commentary, editorial, etc. (bulletin of university, research institution)  

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Language：Japanese   Publishing type：Internal/External technical report, pre-print, etc.  

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Language：Japanese   Publishing type：Internal/External technical report, pre-print, etc.  

J-GLOBAL

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Language：Japanese   Publishing type：Internal/External technical report, pre-print, etc.  

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Language：Japanese   Publishing type：Internal/External technical report, pre-print, etc.  

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Language：Japanese   Publishing type：Internal/External technical report, pre-print, etc.  

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Authorship：Lead author   Language：Japanese   Publishing type：Article, review, commentary, editorial, etc. (bulletin of university, research institution)  

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Language：English   Publishing type：Rapid communication, short report, research note, etc. (scientific journal)  

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Authorship：Corresponding author   Language：Japanese   Publishing type：Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media)  

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Event date： 2018.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：中央大学 後楽園キャンパス，東京   Country：Japan  

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Event date： 2017.12

Language：English   Presentation type：Poster presentation  

Venue：Okinawa   Country：Japan  

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Event date： 2017.11

Language：English   Presentation type：Oral presentation (general)  

Venue：Hiroshima   Country：Japan  

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Event date： 2017.11

Language：English   Presentation type：Oral presentation (general)  

Venue：Hiroshima   Country：Japan  

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Event date： 2017.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：大阪大学 豊中キャンパス，大阪   Country：Japan  

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Event date： 2017.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：大阪大学 豊中キャンパス，大阪   Country：Japan  

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Event date： 2017.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：大阪大学 豊中キャンパス，大阪   Country：Japan  

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Event date： 2017.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：大阪大学 豊中キャンパス，大阪   Country：Japan  

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Event date： 2017.8 - 2017.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：福岡工業大学，福岡   Country：Japan  

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Event date： 2017.8 - 2017.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：福岡工業大学，福岡   Country：Japan  

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Event date： 2017.5 - 2017.6

Language：English   Presentation type：Oral presentation (invited, special)  

Venue：Hanover   Country：Germany  

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Event date： 2017.5

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：ビッグパレットふくしま，郡山   Country：Japan  

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Event date： 2017.3

Language：Japanese   Presentation type：Oral presentation (general)  

Country：Japan  

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Event date： 2017.3

Language：Japanese   Presentation type：Oral presentation (general)  

Country：Japan  

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Event date： 2017.3

Language：Japanese   Presentation type：Oral presentation (general)  

Country：Japan  

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Event date： 2016.10

Language：English   Presentation type：Poster presentation  

Venue：Portland   Country：United States  

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Event date： 2016.10

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：名古屋大学，名古屋   Country：Japan  

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Event date： 2016.9

Language：English  

Venue：Tours   Country：France  

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Event date： 2016.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：九州大学，福岡   Country：Japan  

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Event date： 2016.6

Language：English   Presentation type：Oral presentation (general)  

Venue：Bremen   Country：Germany  

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Event date： 2016.3

Language：Japanese   Presentation type：Oral presentation (general)  

Country：Japan  

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Event date： 2016.3

Language：Japanese   Presentation type：Oral presentation (general)  

Country：Japan  

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Event date： 2015.10

Language：English   Presentation type：Oral presentation (general)  

Venue：Taipei   Country：Taiwan, Province of China  

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Event date： 2015.9

Language：Japanese   Presentation type：Oral presentation (general)  

Country：Japan  

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Event date： 2015.9

Language：Japanese   Presentation type：Oral presentation (general)  

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Event date： 2015.9

Language：Japanese   Presentation type：Oral presentation (general)  

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Event date： 2015.9

Language：Japanese   Presentation type：Oral presentation (general)  

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Event date： 2015.5

Language：Japanese   Presentation type：Poster presentation  

Venue：みやこめっせ，京都   Country：Japan  

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Event date： 2015.5

Language：Japanese   Presentation type：Poster presentation  

Venue：みやこめっせ，京都   Country：Japan  

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Event date： 2015.4

Language：English   Presentation type：Oral presentation (general)  

Venue：Okinawa   Country：Japan  

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Event date： 2015.3

Language：Japanese   Presentation type：Oral presentation (general)  

Country：Japan  

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Event date： 2015.3

Language：Japanese   Presentation type：Oral presentation (general)  

Country：Japan  

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Event date： 2015.3

Language：Japanese   Presentation type：Oral presentation (general)  

Country：Japan  

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Event date： 2015.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：東洋大学 白山キャンパス，東京   Country：Japan  

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Event date： 2014.12

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：東京ビッグサイト，東京   Country：Japan  

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Event date： 2014.11

Language：English  

Venue：Boston   Country：United States  

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Event date： 2014.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：岩手大学 上田キャンパス，盛岡   Country：Japan  

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Event date： 2014.6

Language：English  

Venue：Dubrovnik   Country：Croatia  

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Event date： 2014.5

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：機械振興会館，東京   Country：Japan  

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Event date： 2014.5

Language：Japanese   Presentation type：Poster presentation  

Country：Japan  

Pneumatic actuators can achieve compliance and flexibility easily. For the above-mentioned reasons, pneumatic actuators are used in widely fields of medical treatments and industries. However the pneumatic control vale that can control air flow rate smoothly is large scale weigh. The purpose of this study is development of the new flow control valve using torsional vibration. This valve can control air flow continuously and drive by power saving. In this report, firstly we show basic mechanism of the valve and expound the advantage to drive by low power. Next we designed the prototype of this valve using FEM. Finally, we confirmed the principle of the valve.

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Event date： 2014.5

Language：Japanese   Presentation type：Poster presentation  

Country：Japan  

The purpose of this study is development of the flow control valve which is small in size, lightweight and can control air flow proportionally. In this study, we thought about a condition that makes flow rate proportional to applied voltage taking the vibration property of orifice plate into consideration. To verify whether the condition is appropriate to flow control valve using particle excitation, a prototype using Langevin type transducer structure that aims at application to proportional valve has been designed by using finite element method and made. And we have evaluated the vibration property and flow rate of the prototype.

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Event date： 2014.3

Language：Japanese   Presentation type：Oral presentation (general)  

Country：Japan  

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Event date： 2014.3

Language：Japanese   Presentation type：Oral presentation (general)  

Country：Japan  

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Event date： 2014.3

Language：Japanese   Presentation type：Oral presentation (general)  

Country：Japan  

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Event date： 2014.1

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：関西大学 千里山キャンパス，吹田   Country：Japan  

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Event date： 2013.10

Language：English  

Venue：St. Paul   Country：United States  

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Event date： 2013.9

Language：Japanese   Presentation type：Oral presentation (general)  

Country：Japan  

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Event date： 2013.8

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：日本大学 駿河台キャンパス，東京   Country：Japan  

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Event date： 2013.8

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：日本大学 駿河台キャンパス，東京   Country：Japan  

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Event date： 2013.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：大阪工業大学 大宮キャンパス，大阪   Country：Japan  

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Event date： 2013.3

Language：Japanese   Presentation type：Oral presentation (general)  

Country：Japan  

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Event date： 2013.3

Language：Japanese   Presentation type：Oral presentation (general)  

Country：Japan  

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Event date： 2013.3

Language：Japanese   Presentation type：Oral presentation (general)  

Country：Japan  

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Event date： 2013.3

Language：Japanese   Presentation type：Oral presentation (general)  

Country：Japan  

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Event date： 2012.10

Language：English  

Venue：San Diego   Country：United States  

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Event date： 2012.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：首都大学東京（東京都立大学） 南大沢キャンパス，八王子   Country：Japan  

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Event date： 2011.11

Language：English  

Venue：Denver   Country：United States  

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Event date： 2011.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：金沢大学 角間キャンパス，金沢   Country：Japan  

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Event date： 2011.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：金沢大学 角間キャンパス，金沢   Country：Japan  

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Event date： 2011.3

Language：Japanese   Presentation type：Oral presentation (general)  

Country：Japan  

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Event date： 2011.3

Language：Japanese   Presentation type：Oral presentation (general)  

Country：Japan  

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Event date： 2011.3

Language：Japanese   Presentation type：Oral presentation (general)  

Country：Japan  

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Event date： 2011.3

Language：Japanese   Presentation type：Oral presentation (general)  

Country：Japan  

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Event date： 2010.10 - 2010.11

Language：English  

Venue：Atlanta   Country：United States  

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Event date： 2010.9

Language：Japanese   Presentation type：Oral presentation (general)  

Country：Japan  

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Event date： 2010.8

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：岡山大学，岡山   Country：Japan  

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Event date： 2010.5

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：京都大学，京都   Country：Japan  

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Event date： 2010.4

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：高エネルギー加速器研究機構，つくば   Country：Japan  

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Event date： 2010.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：埼玉大学，さいたま   Country：Japan  

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Event date： 2010.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：埼玉大学，さいたま   Country：Japan  

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Event date： 2010.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：埼玉大学，さいたま   Country：Japan  

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Event date： 2010.1

Language：Japanese   Presentation type：Poster presentation  

Venue：関西大学 千里山キャンパス，吹田  

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Event date： 2009.11

Language：English   Presentation type：Oral presentation (general)  

Venue：Station Hotel Kokura, Kitakyushu   Country：Japan  

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Event date： 2009.10

Language：English   Presentation type：Poster presentation  

Venue：Monterey   Country：United States  

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Event date： 2009.10

Language：English   Presentation type：Poster presentation  

Venue：Monterey   Country：United States  

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Event date： 2009.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：神戸大学，神戸   Country：Japan  

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Event date： 2009.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：神戸大学，神戸   Country：Japan  

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Event date： 2009.5

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：千里ライフサイエンスセンター，豊中   Country：Japan  

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Event date： 2009.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：中央大学，東京   Country：Japan  

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Event date： 2009.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：中央大学，東京   Country：Japan  

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Event date： 2009.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：中央大学，東京   Country：Japan  

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Event date： 2009.1

Language：Japanese   Presentation type：Poster presentation  

Venue：関西大学 千里山キャンパス，吹田   Country：Japan  

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Event date： 2008.10

Language：English   Presentation type：Poster presentation  

Venue：Portland, Oregon   Country：United States  

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Event date： 2008.9

Language：English   Presentation type：Oral presentation (general)  

Venue：Awaji Yumebutai International Conference Center, Awaji   Country：Japan  

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Event date： 2008.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：東北大学 川内北キャンパス，仙台   Country：Japan  

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Event date： 2008.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：東北大学 川内北キャンパス，仙台   Country：Japan  

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Event date： 2008.9

Language：Japanese   Presentation type：Oral presentation (general)  

Country：Japan  

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Event date： 2008.8

Language：Japanese   Presentation type：Oral presentation (general)  

Country：Japan  

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Event date： 2008.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：明治大学，川崎   Country：Japan  

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Event date： 2008.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：明治大学，川崎   Country：Japan  

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Event date： 2008.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：明治大学，川崎   Country：Japan  

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Event date： 2008.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：明治大学，川崎   Country：Japan  

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Event date： 2008.1

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Event date： 2007.9

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Event date： 2007.5

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Event date： 2007.3

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Event date： 2007.3

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Event date： 2007.3

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Event date： 2007.3

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Event date： 2007.1

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Event date： 2007

Venue：Dallas  

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Event date： 2006.8

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Event date： 2006.7

Venue：Osaka  

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Event date： 2006.5

Venue：Baden  

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Event date： 2006.3

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Event date： 2006.3

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Event date： 2006.3

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Event date： 2006.3

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Event date： 2006.3

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Event date： 2006.1

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Event date： 2005.10

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Event date： 2005.9

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Event date： 2005.9

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Event date： 2005.6

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Event date： 2005.4

This paper describes the application of the active flexible fixture (AFLEF) with passive RCC to the peg-in-hole task on the disk in the X-band accelerator. The AFLEF can fix any work and position the fixed work at short range. In this paper, the 2-dimensional AFLEF is proposed as the simplified type and is provided with passive RCC function to be equipped with dexterity for a peg-in-hole task. As results of the experiment on the peg-in-hole task on the X-band accelerator disks with the AFLEF, we make the ability of the AFLEF for the task clear and also the boundary conditions to the complete task clear.

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Event date： 2005.3

標記のセンサとアクチュエータの開発を目的としたプロジェクトの研究成果の概要を報告した。報告は,1)マイクロ加速度センサに関する構造設計,2)マイクロ超音波センサのバックプレートに設けるダンピングホールの最適設計,3)FET動作を用いた増幅型静電容量圧力センサの製作,について行った。研究では,それぞれ,1)有限要素法による共振周波数と加速度との関係を調べた,2)送受信兼用のコンデンサ型マイクロ超音波センサにおけるダンピングホールの大きさと個数を有限要素法によってシミュレーションを行い,最適設計を行った,3)圧力変化によってMOSFETの印可電圧を変化させて信号増幅を行うことができる圧力センサを製作した。

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Event date： 2005.3

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Event date： 2005.3

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Event date： 2005.3

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Event date： 2005.3

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Event date： 2005.3

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Event date： 2005.3

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Event date： 2005.3

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Event date： 2005.3

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Event date： 2005.3

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Event date： 2005.3

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Event date： 2005.3

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Event date： 2005.1

様々な電子機器のデバイス部品を省エネルギかつ低コストで製造するために，加工機の小型化が進められている．本研究では，ナノオーダの切削加工を目的とするサブミリサイズのマイクロ加工機の開発に着手し，試作機の開発を行った．工具の運動部に，シリコンファブリケーションによる直動型静電マイクロアクチュエータを適用し，さらに，その表面に，異方性エッチングによりマイクロピラミッド群の切れ刃を形成し，試作機の動作確認を行った．

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Event date： 2004.11

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Event date： 2004.11

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Event date： 2004.11

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Event date： 2004.11

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Event date： 2004.11

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Event date： 2004.11

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Event date： 2004.11

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Event date： 2004.10

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Event date： 2004.9

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Event date： 2004.9

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Event date： 2004.9

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Event date： 2004.7

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Event date： 2004.7

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Event date： 2004.4

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Event date： 2004.4

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Event date： 2004.3

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Event date： 2004.3

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Event date： 2004.3

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Event date： 2004.1

マイクロマシンの動特性を二次元解析として行う場合に用いられる空間的縞解析法は,測定物体が大きく変形し,解析に用いる基準となる縞が解析可能な周期を大きく逸脱すると,部分的に解析が困難になる問題がある。この問題の解決法を一次元解析で示してきたが,一次元処理ではマイクロマシンの動特性解析において実用上十分な解析を行うことができない問題が生じている。すなわち,微小構造物全体の変位や変形を解析するためには干渉縞を二次元で解析する必要がある。一次元処理を二次元処理へと拡張することによって,このような解析法の改善をはかった。さらに,従来から高精度解析を行うことができると考えられているフーリエ変換法との比較によって本手法の有効性を議論した。

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Event date： 2004

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Event date： 2003.9

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Event date： 2003.3

アルカリ水溶液によるシリコン単結晶の異方性エッチングの過程で,反応生成物が表面に付着してマイクロピラミット(MP)を形成する。このMPを利用してマイクロツールを開発している。単結晶シリコンをKOH水溶液でエッチング処理してMPの状態を調べ,その平面的配列はフラクタル分布,先端高さの分布は正規分布であることから,このマイクロツールの切れ刃の分布状態は,研削砥石のそれと酷似していることを明らかにした。ミリ-サイズ加工デバイスを作製し,切削性能を調べた。

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Event date： 2003.3

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Event date： 2003.3

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Event date： 2003

実用的なマイクロメータサイズロボットを実現するために,シリコンファブリケーションを応用したマイクロマシニング技術によるマイクロパーツ,あるいはマイクロデバイスの開発計画を紹介した。現在,1)マイクロアレイ型超音波センサ,2)微量血液検査システムのための微小注射針,3)透明媒体中金属薄膜へのレーザマーキング,4)Siマイクロピラミッドによるナノ切削加工,の4テーマの研究が進行中である。

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Event date： 2002.12

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Event date： 2002.11

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Event date： 2002.11

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Event date： 2002.8

Venue：近畿大学，和歌山  

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Event date： 2002.7

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Event date： 2002.4

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Event date： 2002.4

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Event date： 2002.3

シリコンの異方性エッチング過程で発生するマイクロピラミッドは微小なやすりの切れ刃と見なせ,ナノオーダの除去加工を行うマイクロツールとして期待される。本研究では,このマイクロツールを取り付けた可動体を外部から拘束されない独立した構造にし,電磁石の磁力の変化を利用して主運動を与えて定圧加工を行うミリ加工機の開発を行い,本加工機でAl-Mg合金が切削可能であることを確認した。

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Event date： 2002.3

シリコン単結晶の異方性エッチング過程で生成されるマイクロピラミッドを切れ刃とするマイクロツールの切削能力を確認し,ミリサイズ,マイクロサイズの加工装置を試作した。上記エッチング過程で形成するマイクロピラミッド(MP)は4角錐の形状の微小突起物であり,その3次元分布は研削砥石の作用面の砥粒切れ刃分布に類似する。フリントガラスの小片を試料(凸面)として,超音波振動と往復動を行う装置によりMPを使った加工実験を行った。さらにミリサイズの加工機の開発の基礎実験装置(電磁石利用)を製作し,被削材をAl-Mg合金(JIS A5086)を加工した結果,切削条痕の深さが平均40nmであることを確認した。また,マイクロサイズ加工装置の試作実験結果も示した。

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Event date： 2002.3

Venue：東京工業大学，東京  

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Event date： 2002.3

Venue：東京工業大学，東京  

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Event date： 2002.3

Venue：東京工業大学，東京  

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Event date： 2002.3

Venue：東京工業大学，東京  

科研費基盤研究 199604-200103

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Event date： 2002.3

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Event date： 2002.3

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Event date： 2001.11

Venue：生産性国際交流センター，神奈川  

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Event date： 2001.11

Venue：生産性国際交流センター，神奈川  

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Event date： 2001.9

Venue：大阪大学，大阪  

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Event date： 2001.5

This report describes the influence by difference of the conveyance performance of the robot. It is efficient to do conveyance work by using the robot of the plural unit. Thereupon, we constructed the plural unit conveyance system that the robot of the plural unit shares conveyance work and be able to materialize the conveyance including collision avoidance. We did the confirmation of the influence by using the system. As a result, it became clear that there are the first position and restriction condition of the robot that collision avoidance number decreases or collsion avoidance time become small.

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Event date： 2001.3

シリコン単結晶の異方性エッチングにより形成されるマイクロピラミッドを切れ刃に利用する,マイクロツールの可能性を検討した。マイクロピラミッドの形成はエッチング条件に依存し,低濃度のKOH水溶液を用いて高温で長時間エッチングすると高密度となり,マイクロピラミッドの平均高さが高くなる。マイクロツールを製作するためのエッチング条件選択システムは,遺伝的アルゴリズムを用いて構築できる。

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Event date： 2001.3

Venue：東京都立大学，東京  

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Event date： 2001.3

Venue：東京都立大学，東京  

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Event date： 2001.3

Venue：東京都立大学，東京  

重点領域研究助成 200004-200103

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Event date： 2001.3

Venue：東京都立大学，東京  

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Event date： 2000.9

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Event date： 2000.9

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Event date： 2000.8

サイズが数十μm-数mm程度のマイクロ・ロボット用のセンサ・アクチュエータの開発と,その性能を評価するマイクロマシン用計測システムの開発を紹介した。アクチュエータとしては制御性に優れた圧電駆動方式,センサには圧電検出方式の開発を計画し,振動解析,振動観察,振動制御の各問題を検討する。マイクロアクチュエータとしての圧電駆動カンチレバにより尺取り虫型マイクロロボットの移動機構等への応用が考えられる。マイクロセンサでは圧電薄膜を利用したアレイ型超音波センサ,アレイ型触覚センサを開発する予定である。何れも多くの業界,分野で広範囲の応用が期待される。

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Event date： 2000.3

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Event date： 2000.3

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Event date： 1999.10

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Event date： 1998.7

This paper presents a new assembly unit for practical passive compliant assembly system. Previously such functions for flexible and skillful assembly as passive compliant system are added to a hand-manipulator. But an assembly system is not made practical by this method because a hand or a manipulator become big and heavy. On the other hand, a fixture is permitted to be a little big and heavy. So a fixture is added with some parts of functions for flexible and skillful assembly, that is 'active functional fixture' is proposed as practical assembly unit. In this paper, the 'compliant fixture' having similar function ofRCC device is considered. The effect of this proposed fixture is investigated by evaluating the performance of a peg-in-hole task theoretically. From the results of the analysis, it is clear that the compliant fixture has two advantages. The first one is the wide ranges of the compliance center's location in which the assembly unit shows good performances. The second one is the wedging-free/jamming-free operation throughout the insertion process, even though the size of the work and the friction are large. Due to these advantages, the proposed compliant fixture is suitable for the practical passive compliant assembly system.

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Event date： 1997.3

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Event date： 1997.3

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Event date： 1997.3

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Event date： 1997.3

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Event date： 1997.3

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Event date： 1996.10

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Event date： 1995.11

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Event date： 1992.7

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Event date： 1990.7

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Event date： 1987.11

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