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Fundamental Experiments
Katsushi Furutani, Takahiro Tsuchiya, Hiroki Yamagishi
Session ID: A02
Published: August 20, 2015
Released on J-STAGE: February 20, 2016
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This report proposes an additive manufacturing method by electrical discharge on a powder bed in air. While a stage was manually driven in the x- and y-directions, discharge was selectively occurred between twin electrodes through the powder bed connecting to the ground and the power was solidified. By repeating this process, a fabrication of three-dimensional solid was demonstrated. An overhung shape with dimensions of millimeters order was also fabricated.
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Addition of conductivity to the electrode
Yuya Suzuki, Ryota Mori, Takayuki Hirano, Akihiro Goto, Masashi Yoshid ...
Session ID: A03
Published: August 20, 2015
Released on J-STAGE: February 20, 2016
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In this study, transference of insulating material from the electrode to the workpiece with pulse discharges is investigated. Zinc is used as medium for transference of the insulating material as well as binder of the electrode. Zinc powder and insulating material powder is mixed and pressed and it becomes an electrode. When discharge is occurred between the electrode and the workpiece, electrode material, zinc and insulation material, moves to the workpiece. In this report, how to give the electrode conductivity is discussed.
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Atsushi Yamaguchi, Toshiki Ikeshima, Tatsuya Miyake, Akira Okada
Session ID: A04
Published: August 20, 2015
Released on J-STAGE: February 20, 2016
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This study has proposed a method of machining curved-holes using electrical discharge machining (EDM) with a suspended ball electrode. The EDM characteristics for die steel (JIS SKD11) and aluminum alloy (JIS A5052) using a suspended ball electrode were investigated. Using a copper-tungsten ball electrode of 7.0 mm in diameter, the stable machinings of both types of material were possible. Under almost EDM conditions, the machining speed using a suspended ball electrode was faster than that using a rod electrode with an electrode jump motion. The hole-diameter using the suspended ball electrode was larger than when using the rod electrode. It was found that the machining stability with the suspended ball electrode was affected mainly by the servo voltage. Additionally, the possibility of curved-hole machining using a suspended ball electrode was discussed. The experimental results showed that a 30°: curved-hole could be successfully machined in these materials by tilting the workpiece.
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Norliana Mohd Abbas, Masanori Kunieda
Session ID: A06
Published: August 20, 2015
Released on J-STAGE: February 20, 2016
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The controlled pulse train method was introduced to increase discharge energy and enlarge unit removal per crater in micro electrical discharge machining (EDM) using electrostatic induction feeding method as the pulse generator. With this method, group of discharges is allowed to occur at a single location within a controlled predetermined time known as pulse train duration. By fixing a cylindrical feeding electrode coaxially to the mandrel, capacitance C1 can be formed between the feeding electrode and the tool to realize the non-contact electrical feeding. However, the small feeding capacitance leads to very small discharge energy per pulse causing interval between the pulse discharges and interrupting the discharge continuity within the pulse train duration. This is undesirable because it will affect the size of discharge crater. Thus, by re-designing the feeding electrode the capacitance can be increased even if there is a limit on the length. This paper explains the new design and the manufacturing process of the feeding electrode. Comparison of discharge energy and crater size between the current and the new feeding capacitance will be made. Continuity of discharges within the pulse train duration will be observed.
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Ryuuichirou Fujieda, Masanori Kunieda
Session ID: A07
Published: August 20, 2015
Released on J-STAGE: February 20, 2016
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Azumi Mori, Masanori Kunieda, Kohzoh Abe
Session ID: A08
Published: August 20, 2015
Released on J-STAGE: February 20, 2016
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Takumi Mimma, Shinya Hayakawa, Fumihiro Itoigawa, Takashi Nakamura
Session ID: A09
Published: August 20, 2015
Released on J-STAGE: February 20, 2016
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Yuto Matsubara, Takeo Tamura
Session ID: A14
Published: August 20, 2015
Released on J-STAGE: February 20, 2016
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Kohei Shimizu, Takeo Tamura
Session ID: A15
Published: August 20, 2015
Released on J-STAGE: February 20, 2016
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Yonghua Zhao, Masanori Kunieda, Kohzoh Abe
Session ID: A16
Published: August 20, 2015
Released on J-STAGE: February 20, 2016
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Daisuke Nozaki, Akihiro Goto, Atsushi Nakata, Nagao Saito
Session ID: A19
Published: August 20, 2015
Released on J-STAGE: February 20, 2016
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Fuchen Chu, Masanori Kunieda
Session ID: A20
Published: August 20, 2015
Released on J-STAGE: February 20, 2016
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In electrochemical machining (ECM) processes, the workpiece is opposed to the tool electrodes in the electrolyte to get specific shape by electrolysis. In this complicated process, a wide variety of products, including bubbles and sludge of metal oxides are generated in the gap. These products influence the accuracy of ECM. As a result, to elucidate the gap phenomena, transparent electrodes made of semiconductor SiC wafer were utilized to observe the gap while machining. However, the material characteristics of semiconductor possibly make ECM processes different from the actual machining processes. Hence, the differences of ECM processes between using transparent electrodes such as SiC and ITO glass and using metallic material are investigated.
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Wei Han, Masanori Kunieda
Session ID: A21
Published: August 20, 2015
Released on J-STAGE: February 20, 2016
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Micro-electrodes have various applications in micro discharge machining (EDM) and micro electrochemical machining (ECM). In most cases, the micro-rods are fabricated by EDM and wire electrical discharge grinding (WEDG). The authors tried to fabricate the micro-rod using the micro-electrochemical machining due to the advantage, compared with the EDM and WEDG, with which the influence of the thermal process can be eliminated. This is because Electrochemical machining (ECM) is an anodic electrochemical dissolution process. On the other hand, the electrostatic induction feeding method developed by the authors was used in EDM and ECM. With the electrostatic induction feeding method, ultra-short current pulses can easily be obtained without a need to use an expensive pulse generator. In this report, the influence of the insulated cathode electrode on the micro-rod machining was investigated. The influence of the insulated and un-insulated electrode on the aspect ratio, surface accuracy, pitting corrosion, and material removal rate would be analyzed. In addition, the distribution of the gap current was simulated using COMSOL Multiphysics.
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Kohei Otake, Wataru Natsu
Session ID: A22
Published: August 20, 2015
Released on J-STAGE: February 20, 2016
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Dahai Mi, Wataru Natsu
Session ID: A24
Published: August 20, 2015
Released on J-STAGE: February 20, 2016
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The effect of electrical double layer (EDL) on the machining characteristic of Pulsed Electrochemical Machining (PECM) is investigated in this paper. It is believed that because of the double layer′s capacitive effect, the Electrochemical Machining (ECM) process using ultrashort pulses has the ability to achieve microstructure, which was difficult to machine with ECM due to the stray current. In this simulation, the EDL was modeled as capacitor, and the final machining current was calculated by combining the double layer effect and the Butler-Volmer equation. The effects of pulse conditions, such as pulse on time, duty ratio, pulse voltage, on the current distribution and the machined surface were discussed. The results showed that the machining area can be confined, hence the machining accuracy can be improved by choosing proper pulse parameters.
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Hiroshi Nagoya, Wataru Natsu
Session ID: A25
Published: August 20, 2015
Released on J-STAGE: February 20, 2016
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Saori Hizume, Hiroshi Nagoya, Wataru Natsu
Session ID: A26
Published: August 20, 2015
Released on J-STAGE: February 20, 2016
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Yuki Takashima, Wataru Natsu
Session ID: A27
Published: August 20, 2015
Released on J-STAGE: February 20, 2016
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Hiroki Maehama, Hiroaki Date, Satoshi Kanai
Session ID: A30
Published: August 20, 2015
Released on J-STAGE: February 20, 2016
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Yuhi Yoshida, Seungki Kim, Yusuke Imai, Hiroshi Kawaharada
Session ID: A31
Published: August 20, 2015
Released on J-STAGE: February 20, 2016
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Akihisa Urata, Hiroaki Date, Satoshi Kanai, Takayuki Gotoh, Seiki Yasu ...
Session ID: A32
Published: August 20, 2015
Released on J-STAGE: February 20, 2016
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Second Report : Divide Conquer based simplification
Hiromu Ozaki, Fumihito Kyota, Takashi Kanai
Session ID: A33
Published: August 20, 2015
Released on J-STAGE: February 20, 2016
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Akitsune Sakane, Hiromasa Suzuki, Yutaka Ohtake, Yukie Nagai, Katsutos ...
Session ID: A34
Published: August 20, 2015
Released on J-STAGE: February 20, 2016
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Tsubasa Maruyama, Satoshi Kanai, Hiroaki Date
Session ID: A36
Published: August 20, 2015
Released on J-STAGE: February 20, 2016
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Takeru Niwa, Hiroshi Masuda
Session ID: A37
Published: August 20, 2015
Released on J-STAGE: February 20, 2016
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Masaya Suzuki, Takeru Niwa, Hiroshi Masuda, Kiichiro Ishikawa
Session ID: A38
Published: August 20, 2015
Released on J-STAGE: February 20, 2016
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Kenji Oya, Takahiro Nakano, Youichi Nonaka, Masaharu Matsuyama
Session ID: A39
Published: August 20, 2015
Released on J-STAGE: February 20, 2016
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Ataru Kobayashi, Akisato Chida, Hiroshi Masuda
Session ID: A44
Published: August 20, 2015
Released on J-STAGE: February 20, 2016
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Hiroaki Kasai, Daisuke Tsutsumi, Norihisa Okada
Session ID: A45
Published: August 20, 2015
Released on J-STAGE: February 20, 2016
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Daisuke Tsutsumi, Hiroaki Kasai, Norihisa Okada
Session ID: A46
Published: August 20, 2015
Released on J-STAGE: February 20, 2016
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Extension of BIM International Standards for archiving degradation data and the implementation of web delivery function
Masato Hori, Fumiki Tanaka, Masahiko Onosato
Session ID: A47
Published: August 20, 2015
Released on J-STAGE: February 20, 2016
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Masaya Narumi, Eisuke Wakisaka, Satoshi Kanai, Hiroaki Date
Session ID: A61
Published: August 20, 2015
Released on J-STAGE: February 20, 2016
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Kazuto Saitou, Takeru Niwa, Hiroshi Masuda
Session ID: A62
Published: August 20, 2015
Released on J-STAGE: February 20, 2016
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Terukazu Higuchi, Kiichiro Ishikawa
Session ID: A63
Published: August 20, 2015
Released on J-STAGE: February 20, 2016
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Nao Hidaka, Takashi Michikawa, Nobuyoshi Yabuki, Tomohiro Fukuda
Session ID: A64
Published: August 20, 2015
Released on J-STAGE: February 20, 2016
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Kazunori Oono
Session ID: A66
Published: 2015
Released on J-STAGE: February 20, 2016
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The author aims to measure 3D point cloud data in damaged buildings and aged infrastructures by using robot technologies. This paper describes 3D measurement by using 3D Light Detection and Ranging (LIDAR) and mobile robots. A 3D LIDAR is developed for tracked vehicles (20-30kg). Reticulate scan method is proposed for the 3D measurement. Quince with the 3D LIDAR is used for the inspection of the damaged buildings in Tohoku University after East Japan Great Earthquake. 3D measurement in heavy fog is an important research topic. A method of 3D measurement in heavy fog is proposed. 3D point cloud data is measured by using the proposed method in heavy fog. In JAPAN, aged infrastructure is other big social problem. Robot technology can be used as a solution of the aged infrastructure. The 3D mapping technique is developed for inspection of the underground pipes.
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Taiki Sumi, Hiroaki Date, Satoshi Kanai
Session ID: A68
Published: August 20, 2015
Released on J-STAGE: February 20, 2016
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Keisuke Kohira, Kenta Fukano, Hiroshi Masuda
Session ID: A69
Published: August 20, 2015
Released on J-STAGE: February 20, 2016
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Performance evaluation of the experimental equipment using the industrial SCARA robot
Maki Suzuki, Naoki Hashimoto, Aiguo Ming, Tetsuya Taguchi
Session ID: B02
Published: August 20, 2015
Released on J-STAGE: February 20, 2016
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Yuki Machida, Yuki Shimizu, So Ito, Wei Gao, Hiroshi Yamazaki, Yusuke ...
Session ID: B03
Published: August 20, 2015
Released on J-STAGE: February 20, 2016
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Ryota Matsuoka, Tetsuya Taguchi, Shuhei Kurokawa, Takashi Teraoka
Session ID: B04
Published: August 20, 2015
Released on J-STAGE: February 20, 2016
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Atsuko Ohno, WooJae Kim, Yindi Cai, Yuan-Liu Chen, Yuki Shimizu, So It ...
Session ID: B06
Published: August 20, 2015
Released on J-STAGE: February 20, 2016
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Panart Khajornrungruang, Suryadevara Babu, Keiichi Kimura, Keisuke Suz ...
Session ID: B07
Published: August 20, 2015
Released on J-STAGE: February 20, 2016
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This study proposes the concept and a state-of-art compact and mobile apparatus by using an evanescent field for dynamically observing sub 50 nm-sized moving particles on the surface being processed, such as polishing process, in purpose to apply for investigating process phenomena. By this method, only the particles near the surface can be visualized due to the limited range of the localized evanescent field. Therefore, an observed image of scattering light from each nano-particle, however not an image of the particle, will have high contrast since there is no scattering light from other particles that are out of the evanescent field. The developed mobile apparatus approximately has 350 mm long, 150 mm high, 100 mm wide in dimensions and 16 N in weight. The scattering light from moving nano-particles in polishing can be dynamically (up to 100 frame/s) observed down to 50 nm for moving particles on 4H-SiC surface with the developed compact and mobile apparatus.
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Taiji Maruyama, Yuki Shimizu, So Ito, Wei Gao
Session ID: B08
Published: August 20, 2015
Released on J-STAGE: February 20, 2016
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Teppei Onuki, Yuki Nemoto, Yutaro Ebina, Hirotaka Ojima, Jun Shimizu, ...
Session ID: B09
Published: August 20, 2015
Released on J-STAGE: February 20, 2016
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Measurement of the Surface with Random Error
Mahito Negishi, Kotaro Hosaka, Kotaro Akutsu
Session ID: B14
Published: August 20, 2015
Released on J-STAGE: February 20, 2016
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The stitching measurement, which combines plural partial measurements into a whole shape, has been developed based on interferometry. But, with a free-form measurement machine, the measured data are sparse and contain 3D points, causing significant calculation errors. Then, we have developed a new stitch algorithm named ARSA (Approximated Reference Shape Algorithm). ARSA is based on minimizing the error of estimating the approximated reference shape. This algorithm has the unique feature that the calculation error is smaller in the case of severer asphericity. This paper investigates how it works with a surface with random error using the simulation. And we also investigates the relationship between calculation errors and total number of reference shape′s terms.
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Eiki Okuyama, Masayuki Ito
Session ID: B15
Published: August 20, 2015
Released on J-STAGE: February 20, 2016
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(Part 2) A study on the accumulation of random error
Hiroki Hanaoka, Hiroshi Yamazaki, Satoshi Kiyono
Session ID: B16
Published: August 20, 2015
Released on J-STAGE: February 20, 2016
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Hiroki Shimizu, Wataru Matsumoto, Yuuma Tamaru
Session ID: B17
Published: August 20, 2015
Released on J-STAGE: February 20, 2016
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Yuki Kondo, Munetoshi Numada, Hiroyasu Koshimizu, Kazuhide Kamiya, Ich ...
Session ID: B19
Published: August 20, 2015
Released on J-STAGE: February 20, 2016
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The spline filter has two types that periodic and nonperiodic. The transmission characteristics of the periodic spline filter are well known. However, the transmission characteristics of the nonperiodic spline filter are not shown. In the proceeding of JSPE 2015 spring, authors proposed a new method that can calculate the transmission characteristics of the Gaussian filter from actual measurement data and filter output. In this proceeding, using this method, the real transmission characteristics of the periodic and nonperiodic spline filter are confirmed.
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