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Kazuya Naoi
Session ID: G37
Published: 2009
Released on J-STAGE: August 25, 2009
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Signal processing algorithm for graduation positions
Akira TAKAHASHI, Yuichi TAKIGAWA, Yuji KOKUMAI
Session ID: G38
Published: 2009
Released on J-STAGE: August 25, 2009
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Precision line scales are widely used for calibration of measuring instruments. A one-dimensional calibration system for line scales has been developed. To detect the graduations, the calibration system employs an optical microscope with a slit placed on its image plane. In this report, a method to optimize the signal processing algorithm will be discussed to suppress the uncertainty factor resulting from graduation anomaly from the viewpoints of simulation and experiments.
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The Measurement of the Line Width by the STEM Images of High Magnification
Kazuki Kuwabara, Yusuke Sawauchi, Satoru Takahashi, Kiyoshi Takamasu
Session ID: G39
Published: 2009
Released on J-STAGE: August 25, 2009
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The 1st report: Measurement of air-refractive-index fluctuation using Fabry-Perot cavity
Tuan Quoc Banh, Yuria Ohkubo, Masashi Ishige, Masato Aketagawa
Session ID: G62
Published: 2009
Released on J-STAGE: August 25, 2009
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The fluctuation of refractive index of air (Δ
nair) in the applications of laser interferometer is a dominate uncertainty source of the measurement. Stable experimental environment in the ambient of air for the nanometer order accurate measurement is required due to the progress of nanotechnology. In this report, we propose a construction of a constant temperature and a constant ″air-refractive-index″ chamber using optical cavity in which the stabilities for temperature and air refractive index are 1 mK and 10
-10, respectively, in normal air environment.
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Yusuke Kajihara, Susumu Komiyama, Nickels Patrick, Takeji Ueda
Session ID: G63
Published: 2009
Released on J-STAGE: August 25, 2009
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Azusa Hattori, Katsuyoshi Endo
Session ID: G64
Published: 2009
Released on J-STAGE: August 25, 2009
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We are developing surface cleaning method for GaN(0001) as received substrate to confirm the general preparation method of GaN clean surfaces and studying their atomic structures during cleaning process systematically. So far, we have confirmed the annealing condition in ultra high vacuum for clean surface. We found that different surface structures appeared even after the same annealing treatment at different synthesized samples. In the presentation, we will show each different surface structure and discussed the origin of the structures dependency.
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Keisuke Asai, Shinsuke Kawanishi, Akira Sasaki, Tatsuo Ushiki, Futoshi ...
Session ID: G65
Published: 2009
Released on J-STAGE: August 25, 2009
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Shoichiro Tanaka, Yoshikazu Kobayashi, Kenji Shirai
Session ID: G67
Published: 2009
Released on J-STAGE: August 25, 2009
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A three-dimensional micro part molding system was developed for the purpose of improving parts accuracy. This machine applies the progressive die fabrication method it fills photopolymerizing polymer into cavities arranged in row and irradiates ultraviolet rays to create three dimensional small parts. This system enables multi-layer laminated shapes of several hundred micrometers to be created for evaluating shape accuracy.
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Shinya Kojima, Takeshi Nakamoto
Session ID: G68
Published: 2009
Released on J-STAGE: August 25, 2009
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The purpose of this research work is to develop a combination machining of laser photolithography and electropolymerization. Structures with high precision can be produced by laser photolithography. However the unirradiated portion is not solidified by laser photolithography. The portion is solidified by electropolymerization in the present method. Electropolymerization is the phenomenon that a film polymerizes on only the anode by applying the electric field on a solvent including a monomer and the supporting electrolyte. The properties and design of the film are different by the constitution of the solvent greatly. When we perform a combination machining of laser photolithography and electropolymerization, we must use UV photopolymer as the solvent. However there has been no previous report in which UV photopolymer was electropolymerized. Therefore the characteristics of electropolymerization for UV photopolymer are examined in this paper.
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Ryota Tanabe, Jiang Zhu, Tomohisa Tanaka, Yoshio Saito
Session ID: G69
Published: 2009
Released on J-STAGE: August 25, 2009
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In this research, a polar coordinate desktop machine tool (P-DMT) was developed combining two rotary motions and one linear motion. The P-DMT is suitable for the machining and measurement of free-form surface such as sculpture. Measurement and machining method for P-DMT is proposed.
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The evaluation of firing condition of conductive ink
Satoshi Kikuchi, Kenji Shimoike, Hiroshi Koresawa, Hiroyuki Narahara, ...
Session ID: G73
Published: 2009
Released on J-STAGE: August 25, 2009
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Kenji Shimoike, Hiroshi Koresawa, Hiroyuki Narahara, Hiroshi Suzuki
Session ID: G74
Published: 2009
Released on J-STAGE: August 25, 2009
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In the ink-jet system, high viscous materials are able to be used by heating.However, there is a limit to use materials not to cause deterioration by heating.In this study, piezo electric ink-jet method controlled by pulse voltage is analyzed numerically to develop a nozzle head.Also, parametric design of nozzle head which promotes injection of high viscous material is performed using quality engineering.
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Report 2 Study on function of dispensing system
Shota Kato, Hiroyuki Narahara, Hiroshi Suzuki
Session ID: G75
Published: 2009
Released on J-STAGE: August 25, 2009
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Crystallographic Orientation and Removal Rate
Takeshi Nakamoto, Yoji Hagita
Session ID: G77
Published: 2009
Released on J-STAGE: August 25, 2009
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It is difficult to machine a sapphire because of its high hardness. The sapphire is composed of aluminum oxide and the material has chemical stability. However, the aluminum oxide reacts with silicon oxide under high temperature and high pressure. In this study, a glass disc that contains the silicon oxide is cut with the sapphire. The sapphire and glass react at the cutting point and the reaction product removes with the machined chips. By this process, the sapphire is removed. In this paper, the removal rate of sapphire on different surface of crystallographic orientation is examined.
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Takahiro Jinushi, Narutoshi Murasugi, Zenzo Ishijima, Kei Ishii
Session ID: G78
Published: 2009
Released on J-STAGE: August 25, 2009
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Keisuke Morita, Keiichi Edagawa, Shigeki Imagawa, Toshiki Niino
Session ID: G79
Published: 2009
Released on J-STAGE: August 25, 2009
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Taku Oohashi, Keitaro Naruse
Session ID: H01
Published: 2009
Released on J-STAGE: August 25, 2009
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Tian Li, Masao Sugi, Hidetoshi Nagai, Masashi Yamamoto, Yusukei Shiomi ...
Session ID: H02
Published: 2009
Released on J-STAGE: August 25, 2009
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Shunting scheduling problems in railway stations can be regarded as a kind of job-shop scheduling problems. But unlike standard job-shop scheduling, shunting scheduling problems have several constrains related to the physical layout of rails and stations. In this paper, we propose a new rescheduling method that can quickly deal with schedule disturbances, such as delays of train arrivals, by combining message passing approach.
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Evaluation Experiment in Practical Nurses' Work Environment
Mingang Cheng, Masako Kanai-Pak, Noriaki Kuwahara, Hiromi/Itoh Ozaku, ...
Session ID: H03
Published: 2009
Released on J-STAGE: August 25, 2009
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In most hospitals in Japan, nurses make schedules how they carry out nursing care for all patients using worksheets. Because of current complex medical treatment modalities and high acuity levels of patients, those schedules often do not go as planned. Nurses frequently encounter interruptions while performing nursing care. This phenomenon creates prolonging nurses′ work hours and particularly impacted on novice nurses. However, an evaluation system for this phenomenon has been received little attention from nurses. In this study, a dynamic scheduling method is proposed. The system was tested in the simulated experimental conditions with which clinical nurses were asked to perform assigned nursing tasks. In this experiment, simulated patients were also introduced for bringing in line with reality. By comparing with the care performed by the nurses′own action rules, it is confirmed that the proposed method is highly applicable to practical nurses′ work environments.
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Nobuhiro Sakamoto, Ikuo Suzuki, Masahito Yamamoto, Michiko Watanabe, M ...
Session ID: H04
Published: 2009
Released on J-STAGE: August 25, 2009
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In many situations, there arise a Vehicle Routing Problem (VRP), which explores the optimum routes for m-vehicles under some criteria and constraints. This study proposes how to apply ″Local Clustering Organization″ (LCO) to VRP. It is proved that LCO brings a good solution by comparing it with other solution methods in numerical experiments.
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Makiko Takahashi, Ikuo Suzuki, Masahito Yamamoto, Michiko Watanabe, Ma ...
Session ID: H05
Published: 2009
Released on J-STAGE: August 25, 2009
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We have proposed a new scheduling method on the order-picking problem in a logistic center based on local clustering organization (LCO). The purpose of the scheduling is to determine an efficient delivery plan for ordered products. This study focuses on the re-scheduling when urgent interrupt orders are requested. We propose a re-scheduling method how the urgent interrupt orders are assigned based on LCO as well. Moreover, the influence by urgent interrupt is examined by simulation experiments, and we prove the effectiveness of the proposed method.
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Tatsuhisa Koshiba, Shigeru Aomura
Session ID: H07
Published: 2009
Released on J-STAGE: August 25, 2009
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Toshihiro Nagatomo, Shigeru Aomura
Session ID: H08
Published: 2009
Released on J-STAGE: August 25, 2009
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Takanobu Nishimoto, Akihiro Hayashi, Shinya Haramaki, Toshifumi Satake
Session ID: H09
Published: 2009
Released on J-STAGE: August 25, 2009
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Manipulator kinematics model of the concept of using multi-agent model. Computational kinematics, the local direct and inverse kinematics the order of the agents calculated in accordance with manipulator structure by exchanging information with each other. By changing the combination of agents, as well as position and posture can be sought. Consider possibility by the numerical simulation.Computational kinematics, the local direct and inverse kinematics the order of the agents calculated in accordance with manipulator structure by exchanging information each other. By changing the combination of agents, as well as position and posture can be sought. Consider possibility by the numerical simulation.
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Minoru Kubo, Akihiro Hayashi, Shinya Haramaki, Toshifumi Satake
Session ID: H10
Published: 2009
Released on J-STAGE: August 25, 2009
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The dynamic behaviors of redundant manipulators are simulated by applying decentralized motion control schema to manipulation problems. The schema models a motion control system as a set of simple mass control sub-systems to take control of each joint. Sub-systems that are a sort of an agent exchange the information of joint motion each other to control joint corresponding to its-self. The motion of manipulator is tailored by the independent action of sub-systems to be done with information exchange. Phase plane analysis is conceived as a simple method for realizing the mass control of each joint and it is applied for decentralized manipulator position control system base on the modeling. Numerical simulations are executed for investigating the feasibilities and the influences of the decentralized mass control base on phase plane analysis. Various ways and views are obtained to reflect correlation among sub-systems to the control decision.
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Atsunori Betsuyaku, Toshifumi Satake, Akihiro Hayashi, Shinya Haramaki
Session ID: H14
Published: 2009
Released on J-STAGE: August 25, 2009
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Shingo Mizoi, Keitaro Naruse
Session ID: H15
Published: 2009
Released on J-STAGE: August 25, 2009
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Acquisition of stable flying behavior
Makoto Morinaga, Ikuo Suzuki, Masahito Yamamoto, Masashi Furukawa
Session ID: H16
Published: 2009
Released on J-STAGE: August 25, 2009
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This study aims at an acquisition of the stable flying under the virtual air environment that models the drag and the buoyancy.The designed model is inspired by existing creatures with several wings, and controlled by artificial neural network.Simulations by these models are carried out to evolve the proper behaviors by genetic algorithm.Simulation results verify that these models can fly stably by using wingstroke and gliding under the virtual air environment.
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Kazuya Ojiri, Ikuo Suzuki, Masahito Yamamoto, Masashi Furukawa
Session ID: H17
Published: 2009
Released on J-STAGE: August 25, 2009
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This study attempts to acquire autonomous behaviors on an artificial creature with multi-legs. We adopted physics modeling to represent the artificial creature in a virtual environment governed by the physics low. The model is equipped with actuator, controller, and self-evolution mechanism. Simulation results show the creature successfully acquires harmonious walking. Furthermore, we discuss the obtained behaviors by comparing with a real multi-legged organism.
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Underwater Behavior of Virtual Creatures
Keita Nakamura, Ikuo Suzuki, Masahito Yamamoto, Masashi Furukawa
Session ID: H18
Published: 2009
Released on J-STAGE: August 25, 2009
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We have presented the physics modeling of the swimming control of the virtual creatures in the virtual underwater environment with the buoyancy and the drag for the acquiring the reasonable behaviors visually. In this study, we try to evolve the morphologies of the virtual creatures in order to swim faster or more flexible. Simulation results show that appropriate behaviors can be obtained by our proposed method.
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The implementation of the control algorithm in fixed-point arithmetic
Tatsu Aoki
Session ID: H20
Published: 2009
Released on J-STAGE: August 25, 2009
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Recently, a robot toy called, MindStorms is noticed in domestic and overseas. The DC motor is controlled by themicrocomputer according to sensor information. Thus, the robot can be designed freely in hardware and softwareby using MindStorms. In my classes of robotics and mechatronics, MindStorms is utilized since fiscal 2000. Thepurpose of this study is to verify weather it is useful for education and research on the robotics and mechatronics.This paper describes the development of the multifingered robot hand by using the MindStorms Kit. The robotichand can grasp an object by unilateral control. Experimental results show that MindStorms can be sufficientlyutilized for education and research of the robotics and mechatronics.
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Masatoshi Imai, Toshiki Niino, Toshiyuki Suzuki, Takayuki Miyashita, S ...
Session ID: H21
Published: 2009
Released on J-STAGE: August 25, 2009
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Control of equivalent mass in force display device
Ken Sasaki, Takashi Morioka, Hideki Miyatake, Michimasa Itoh
Session ID: H22
Published: 2009
Released on J-STAGE: August 25, 2009
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Naoki Takahata, Yasuhiro Kakinuma, Tojiro Aoyama
Session ID: H31
Published: 2009
Released on J-STAGE: August 25, 2009
CONFERENCE PROCEEDINGS
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Masaaki Nakazawa, Yasuhiro Kakinuma, Tojiro Aoyama
Session ID: H32
Published: 2009
Released on J-STAGE: August 25, 2009
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Youhei Oda, Heisaburo Nakagawa, Keiji Ogawa, Yoshiaki Kakino
Session ID: H33
Published: 2009
Released on J-STAGE: August 25, 2009
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Machining status monitoring system using internal sensors has been developed. However, in conventional ball-screw driving machining center with slide or rolling guide ways, it seems to be difficult that the cutting force in stationary axis direction. Moreover, air-cutting was needed before monitoring of cutting force in moving axis direction. In the present study, we evaluated the monitoring performance using internal sensors in a linear motors driving machining center with hydrostatic guide ways. As a result, the cutting force was monitored with high precision and resolution in not only moving but also stationary axis direction with out pre-air-cutting.
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Takashi Kosugi, Akitoshi Matsuo, Yasuhide Ookura, Taro Seo, Tadao Kawa ...
Session ID: H34
Published: 2009
Released on J-STAGE: August 25, 2009
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Estimation of Machining Error in Ball End-Milling of Hemisphere Surface
Kenji Shimana, Eiji Kondo, Yoshihiro Kawano, Shunichi Yamashita, Seiic ...
Session ID: H36
Published: 2009
Released on J-STAGE: August 25, 2009
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In recent years, machining center has been used widely in metal mold manufacturing process because high speed machining by using a small diameter end-mill has been put into practical use. However, in cutting process with an end mill that is a low rigidity, it is very important to estimate the machining error caused by deflection of tool. The purpose of this study is to establish a method of in real time estimating machining errors caused by deflection of end-mill at a cutting point. For this purpose, in this research, the growth mechanism of machining errors in Ball End-Milling of Hemisphere Surface was investigated by comparing measured deflection of tool and cutting forces with machining errors.
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Suppression of regenerative chatter vibration by speed difference between two spindles
Eiji Shamoto, Kohei Nishimura, Yusuke Kurata, Norikazu Suzuki, Tatsuya ...
Session ID: H37
Published: 2009
Released on J-STAGE: August 25, 2009
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Kenta Matsumoto, Hajime Sakuraba, Ryuji Fuchiue, Eiji Kondo
Session ID: H38
Published: 2009
Released on J-STAGE: August 25, 2009
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The purpose of this study is to suppress forced vibrations of spindle head of machining center by using dynamic vibration absorber. Impact tests and running tests without machining were carried out to investigate effect of the dynamic vibration absorber on suppression of forced vibrations of spindle head. Furthermore, cutting tests also were carried out to investigate effect of the suppression of vibration during machining on machining accuracy. As a result, it was demonstrated that both of maximum vibration displacement of spindle head and machining error were reduced by about 40 % by the dynamic vibration absorber when its natural frequency was 120 Hz, which was slightly larger than the natural frequency of spindle head of 110 Hz, and its damping ratio was about 7 %.
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A Consideration to Wear Mechanism of Cutting Tool
Eiji Kondo, Kousuke Kuwahara, Kenji Yoshinaga
Session ID: H39
Published: 2009
Released on J-STAGE: August 25, 2009
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The purpose of this study is to elucidate wear mechanism of cutting tool in high-speed end-milling of titanium alloy. Cutting tests were carried out to observe state of chips on cutting edge and to measure width of tool wear land, dynamic cutting forces, and hardness of machined surface under some conditions: that is, in dry and with mist of cutting fluid. As a result, it was revealed that surface machined with mist of cutting fluid was harder than surface in dry and minimum cutting force in one cut with mist was larger than in dry. Furthermore, it was also demonstrated that the hardness of machined surface and the minimum cutting force may be related with wear mechanism of cutting tool.
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Kazuo Kasahara
Session ID: H61
Published: 2009
Released on J-STAGE: August 25, 2009
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In ball end milling, the cutting velocity of the sphere portion of the end mills changes in magnitude and direction at any point on the cutting edge, furthermore undeformed chip thickness also changes along the cutting edge. The chip is produced with various shear angles, chip flow angles and chip flow velocities so the cutting process is very complicated. In this report, a cutting model taking account of the condition of side-curl of the chip proposed in previous paper is presented. The cutting forces in upward or downward milling in which both cutting edges of the sphere and cylindrical portions engage with the workpiece are predicted by using the cutting model and energy method. The quantitative agreement between predicted and measured results is well enough.
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Kazuo Kasahara, Keisuke Murata, Akihiko Hirota
Session ID: H62
Published: 2009
Released on J-STAGE: August 25, 2009
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In milling with 5-axis machining center, the attitudes of tool or workpiece are controlled by tilting 2 axes, so the milling can be performed by outer portion of cutting edge having large cutting velocity. In this report, geometric quantities such as tool-workpiece contact region, undeformed chip thickness along the cutting edge and area of cutting cross-section in slot milling of a plane for various attitudes of tool are analyzed, and variation of these geometric quantities with tool tilting angle is discussed. Three components of the cutting force under various attitudes are predicted by using a cutting model and energy method proposed in previous paper. It is found that the appropriate tool tilting angle, which gives small variation of the cutting forces with rotational angle and non-overcut caused by tool deflection, can be obtained.
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Comparison of Calculated and Experimental Results
Kazuo Kasahara, Yushi Tanaka, Akihiko Hirota
Session ID: H63
Published: 2009
Released on J-STAGE: August 25, 2009
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In the 1st part of this investigation, the cutting forces in ball end milling along the contour line of inclined surface was predicted by using a cutting model, in which the condition of side-curl of the chip was considered, and energy method proposed in previous paper. By using the cutting force data predicted and Finite Element Method, the tool deflection is calculated and the behavior of the tool in milling was discussed. In this report, the tool deflection in milling of inclined surfaces having various slopes is measured by using eddy-current type sensor and compared with calculated results. The calculated results are good agreement with the experimental results. It is shown that the tool deflection and behavior of the tool vary considerably by feed direction of the tool on the inclined surface.
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Ryuji Iwashita, Hiroyuki Sasahara
Session ID: H64
Published: 2009
Released on J-STAGE: August 25, 2009
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Hideaki Onozuka, Koji Utsumi, Masayuki Kyoi
Session ID: H65
Published: 2009
Released on J-STAGE: August 25, 2009
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Hideki Shibahara, Yuki Kawai, Koichi Okuda
Session ID: H67
Published: 2009
Released on J-STAGE: August 25, 2009
CONFERENCE PROCEEDINGS
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In a micro end mill machining, the tool deflection by cutting force deteriorates the machined shape accuracy, because the rigidity of tool with a small diameter is very low. In this study, the milling tests of alloy tool steel for a die mold with square end mills of diameter of 1 mm or less have been carried out and the machined shape error was evaluated. The relationship between the cutting conditions and the cutting force is examined and then the influence of the cutting force on the machined shape error is investigated.
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Masahiro Sowa, Heisaburo Nakagawa, Keiji Ogawa
Session ID: H68
Published: 2009
Released on J-STAGE: August 25, 2009
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On the mechanism and possibility to cause
Osamu Horiuchi, Mitsuyoshi Nomura, Takayuki Shibata, Yoshihiko Murakam ...
Session ID: H69
Published: 2009
Released on J-STAGE: August 25, 2009
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In micro endmilling, because of small uncut chip thickness and low rigidity of tool, the cutting process must transit between ploughing and micro cutting, and it may deteriorate the machining stability, surface finish and tool wear. In this report, such unique phenomena are investigated by modeling a mechanism, computer simulations and experiments. As a result, a possibility of the unique phenomena proposed has been certified.
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Ryuichi Okazaki, Yoshiki Ito, Tomoya Kawakami, Takuya Semba, Satoru Ku ...
Session ID: H70
Published: 2009
Released on J-STAGE: August 25, 2009
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Micro ball endmill with a tool tip radius of 50 μm was made using PCD, binderless PCD and binderless cBN as a tool material. Tool fabrication technique that can make cutting edge into sharp using PCD plate as a truer whereby the tool working surface was flattened and cutting test results using glass-like carbon, NAK55, SKD11 and cemented carbide as a work material are presented.
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