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Hiromasa Yamamoto, Yoshihiro Yamada, Toru Narita, Hiroyuki Sasahara, M ...
Session ID: A01
Published: 2009
Released on J-STAGE: August 25, 2009
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Effect of end mill cutter on the cutting accuracy
Shigehiko Sakamoto, Hayato Shinagawa, Yuma Kawakami
Session ID: A02
Published: 2009
Released on J-STAGE: August 25, 2009
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Kazuhiko Nishioka, Naohiko Sugita, Mamoru Mitsuishi, Takeshi Watanabe, ...
Session ID: A03
Published: 2009
Released on J-STAGE: August 25, 2009
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Tungsten-based alloys are expected to be new mold materials, replacing conventional sintered tungsten carbide or CVD-silicon carbides, because of their superior thermal properties. However, it is difficult to machine them ultra-precisely because they are brittle materials and induce rapid tool wear. We propose a new method of machining - the cutting-burnishing method, in which the surface roughness is improved by the burnishing effect between the tool and the workpiece. Peripheral cutting experiments were performed using cylindrical workpieces 50 mm in diameter, 10 mm in thickness. Tools of clearance angle 1 deg., 5 deg., 10 deg., cutting edge roundness 0.05 μm, 0.1 μm, 0.3 μm were prepared to investigate the relationship between the burnishing effect and the shape of the tools. We also investigated how the burnishing effect is influenced by the tool materials: alumina ceramic and cemented carbide. The highest quality surface of surface roughness
Rz 0.43 μm was achieved with an alumina ceramic tool of rake angle 1 deg., cutting edge roundness 0.05 μm, depth of cut 1 μm. This was achieved at low cost through the use of inexpensive alumina ceramics, and required a short time of only 2 minutes with a cutting speed of 90 m/min.
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Effect of TiB2 particle content on tool wear
Kazuhiro Shintani, Junichi Iguchi, Yukio Ito
Session ID: A04
Published: 2009
Released on J-STAGE: August 25, 2009
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Noritaka Nagai, Hiroshi Usuki, Yuji Taota, Satoshi Sakamoto, Shogo Nak ...
Session ID: A06
Published: 2009
Released on J-STAGE: August 25, 2009
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Ryo Tezuka, Katsuhiko Sekiya, Keiji Yamada, Yasuo Yamane
Session ID: A07
Published: 2009
Released on J-STAGE: August 25, 2009
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Takanori Koyano, Takashi Hitomi, Imei Ka, Tohru Ihara
Session ID: A08
Published: 2009
Released on J-STAGE: August 25, 2009
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Sadayuki Akaki, Tatsuya Hirose, Tadaaki Satake, Takenobu Takeda
Session ID: A09
Published: 2009
Released on J-STAGE: August 25, 2009
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Taps are subjected to high cutting torque in the tapping process.Therefore, higher toughness and shear strength are strongly required as materials for taps.However, the shear strength of high-speed steel (SKH51) after secondary hardened was about 40% of bending strength and the tensile strength was 64% of bending strength. As for the fracture aspects, ductile fracture occurred under torsion.On the other hand, the tensile and bending specimens were damaged by carbide cracks and debondings in the interface of matrix and carbide. In this investigation, the fracture mechanisms were examined from the SEM microstructures.
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Kazuhiro Shintani, Noriaki Ikenaga, Teppei Nagano, Takashi Yoshimoto, ...
Session ID: A10
Published: 2009
Released on J-STAGE: August 25, 2009
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Heiji Yasui, Junichi Shimazu, Takuro Yoshimura
Session ID: A13
Published: 2009
Released on J-STAGE: August 25, 2009
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Akira Shinozaki, Heiji Yasui
Session ID: A14
Published: 2009
Released on J-STAGE: August 25, 2009
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In our previous researches, the coated-cemented-carbide tool is found so effective for the ultra-precision cutting of stainless steels and titanium metals and so on. In case of ultra-precison cutting of conventional steels and hardened die steels, carbideparticles included inside materials is inferred to influence the finished surface roughness and the tool life. In order to improvethe surface roughness and the tool life, in the research, the effect of low cutting speed on ultra-precision cutting of pure iron withcoated-cemented-carbide tool is examined. Using the low cutting speed below 1 m/min and depth of cut of 5 μm, the surfaceroughness improves remarkably and attains below 34 nm(
Rz) at cutting length of L = 40 m and keeps below 100 nm(
Rz) untilcutting length of 800 m. Tool wears after ultra-precision cutting of pure iron in cutting length of L = 40 m and 1,000m becomeVB = 15 μm and 30 μm, respectively, by using the low cutting speed of below 1 m/min.
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Takekazu Sawa, Yasushi Ikuse, Kuniaki Unno
Session ID: A15
Published: 2009
Released on J-STAGE: August 25, 2009
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Influence of SADFC Dressing Conditions on the Surface Forming of Metal Bond CBN Wheel
Yusuke Tanaka, Yasui Heiji
Session ID: A16
Published: 2009
Released on J-STAGE: August 25, 2009
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Ryushiro Sakamoto, Heiji Yasui
Session ID: A17
Published: 2009
Released on J-STAGE: August 25, 2009
CONFERENCE PROCEEDINGS
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Toshimi Odaki, Susumu Tomita
Session ID: A19
Published: 2009
Released on J-STAGE: August 25, 2009
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Makoto Imajo, Katsuya Nagayama, Keiichi Kimura, Kazuki Ueno
Session ID: A20
Published: 2009
Released on J-STAGE: August 25, 2009
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CMP is a planarization technology of polishing chemical and mechanical action, and it is mainly used for the wafer for the main board of semi-conductor. The friction between wafer and pad generates the heat in CMP process, and it affects on polishing the wafer uniformly. In this study, we analyzed the transport of slurry and heat and we made the phenomenon clear.
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Influence of Polisher Thickness
Masataka Takagi, Heiji Yasui, Kouhei Kusaba
Session ID: A21
Published: 2009
Released on J-STAGE: August 25, 2009
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The influence of the polisher surface structure on the first step polishing characteristic of the aluminum magnetic disk substrate is examined. The polishing pad used is suede type. The pore size of polisher increases with the increase of the surface buffing amount of the polishing pad. The polishing rate is larger for smaller pore size. The substrate waviness becomes smaller for smaller pore size. The thickness of polisher doesn't relate with the polishing rate. The thickness of polisher relates with the roll-off value of disk substrate.
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Heiji Yasui, Noriyuki Fukakusa, Kouhei Kusaba, Masataka Takagi
Session ID: A22
Published: 2009
Released on J-STAGE: August 25, 2009
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Digitalization of Evaluation by utilizing ECG signal
Norihiro Koizumi, Hiroyuki Tsukihara, Shinichi Takamoto, Mamoru Mitsui ...
Session ID: A31
Published: 2009
Released on J-STAGE: August 25, 2009
CONFERENCE PROCEEDINGS
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Yu Ikeda, Etsuko Kobayashi, Ichiro Sakuma, Yuko Yamashita, Takeshi Moc ...
Session ID: A32
Published: 2009
Released on J-STAGE: August 25, 2009
CONFERENCE PROCEEDINGS
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Toshiya Sakai, Yukio Saito, Atsushi Umemura, Toshiaki Ishii
Session ID: A33
Published: 2009
Released on J-STAGE: August 25, 2009
CONFERENCE PROCEEDINGS
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Wataru Hijikata, Chi Nan Pai, Tadahiko Shinshi, Akira Shimokohbe, Take ...
Session ID: A34
Published: 2009
Released on J-STAGE: August 25, 2009
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Shunichi Yoshida, Ryouichi Suzuki, Akio Yasukawa, Kazuo Takakuda, Tomo ...
Session ID: A35
Published: 2009
Released on J-STAGE: August 25, 2009
CONFERENCE PROCEEDINGS
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Naofumi Tsuru, Kazuyoshi Tsuchiya
Session ID: A37
Published: 2009
Released on J-STAGE: August 25, 2009
CONFERENCE PROCEEDINGS
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Takehiko Inoue, Kazuyoshi Tsuchiya, Minoru Kimura, Kagemasa Kajiwara
Session ID: A38
Published: 2009
Released on J-STAGE: August 25, 2009
CONFERENCE PROCEEDINGS
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Sampling Method of Smell Substances by Mist-cyclon Equipment
Osamu Matsubara, Jiang Zhiheng, Shigeki Tooyama
Session ID: A39
Published: 2009
Released on J-STAGE: August 25, 2009
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droplet using high voltage AC electric field
Masami Kagaya, Yasuhiro Sato, Yoichi Akagami
Session ID: A40
Published: 2009
Released on J-STAGE: August 25, 2009
CONFERENCE PROCEEDINGS
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Revised Decision Rule for Working Posture of Upper Limb in Digital Human
Tsuneo Kawano, Yutaka Fukui, Nobuhiro Sugimura
Session ID: A61
Published: 2009
Released on J-STAGE: August 25, 2009
CONFERENCE PROCEEDINGS
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The purpose of this study is to revise the decision rule for working posture of upper limb in the digital human model focusing to the work involving forearm torsion such as screw driving. In the previous report the decision rule was decided as the upper limb took the posture so as to maximize the degree of coincidence of direction vectors. However the error of around 10% of maximum degree of coincidence existed depending on the hand position. In this report revised rule was studied.
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Takuya Ogawa, Yusuke Maeda, Kunio Fukui, Natsuki Miyata
Session ID: A62
Published: 2009
Released on J-STAGE: August 25, 2009
CONFERENCE PROCEEDINGS
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Finding human fingertip forces in handling a productenables us to evaluate the property of the product such asusability.In this study, we present a method to estimate fingertip forcesfrom EMG signals. The method does not require measurement offingertip forces at all; a musculoskeletal model offingers of each subject is used instead. In this method, we calculate the maximum fingertip force from the model and finger pose measured by a data glove.Then, we estimate current fingertip forcesfrom the maximum fingertip force and measured EMG signals.Experimental results for an index finger show thatthe estimation is basically possible.
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Maki Takano, Yukio Saito, Atsushi Umemura
Session ID: A63
Published: 2009
Released on J-STAGE: August 25, 2009
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Tatsurou Okazaki, Hiroshi Yokoi
Session ID: A64
Published: 2009
Released on J-STAGE: August 25, 2009
CONFERENCE PROCEEDINGS
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Junichi Okawa, Shigenobu Suzuki, Akira Kakimoto, Yukio Sekiguchi, Fumi ...
Session ID: A66
Published: 2009
Released on J-STAGE: August 25, 2009
CONFERENCE PROCEEDINGS
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Yutaka Nagahama, Yusuke Fujii, Akira Kakimoto, Shigenobu Suzuki, Fumiy ...
Session ID: A67
Published: 2009
Released on J-STAGE: August 25, 2009
CONFERENCE PROCEEDINGS
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Sae Esaka, Hiroaki Seki, Yoshitsugu Kamiya, Masatoshi Hikitsu
Session ID: A68
Published: 2009
Released on J-STAGE: August 25, 2009
CONFERENCE PROCEEDINGS
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Makoto Suzuki
Session ID: A69
Published: 2009
Released on J-STAGE: August 25, 2009
CONFERENCE PROCEEDINGS
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Eye-gaze interface is expected to be used more widely, but its complex calibration is problem. In this study, we studied reducing calibration by lowering the demanded resolution of eye-gaze measurement, to help operation of assisting manipulator for handicapped person. Using plural infra-red light sources as candidate points of gazing, a method to distinguish the actual gazing point based on processing of eyeball image is studied. From the experiment system, number of points of calibration can be reduced to 1 point from currently used 9 points.
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Kiyohide Arimizu, Hiroshi Yokoi
Session ID: A73
Published: 2009
Released on J-STAGE: August 25, 2009
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Method for display of displacement information by FES
Hyunchul Souk, Hiroshi Yokoi
Session ID: A74
Published: 2009
Released on J-STAGE: August 25, 2009
CONFERENCE PROCEEDINGS
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Hiroshi Yamaura, Ryu Kato, Hiroshi Yokoi
Session ID: A75
Published: 2009
Released on J-STAGE: August 25, 2009
CONFERENCE PROCEEDINGS
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Tadashi Yoshimura, Yukio Saito, Takanori Higashihara
Session ID: A76
Published: 2009
Released on J-STAGE: August 25, 2009
CONFERENCE PROCEEDINGS
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Electric Effect of clothes material on SN ratio
Yoshio Ishida, Hideki Tomimori, Ken Sasaki, Yasuhiko Nakano, Satoshi S ...
Session ID: A78
Published: 2009
Released on J-STAGE: August 25, 2009
CONFERENCE PROCEEDINGS
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Evaluation of Supply power
Shudo Takenaka, Fukuro Koshiji, Takuma Maesaka, Ken Sasaki
Session ID: A79
Published: 2009
Released on J-STAGE: August 25, 2009
CONFERENCE PROCEEDINGS
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Reproduction of distortions of vision
Koichi Miura, Keishiro Shimonishi, Takazo Yamada, Hwa-Soo Lee, Kyoko F ...
Session ID: A80
Published: 2009
Released on J-STAGE: August 25, 2009
CONFERENCE PROCEEDINGS
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Kei Watanabe, Marina Fujita, Ryu Kato, Tamio Arai
Session ID: A81
Published: 2009
Released on J-STAGE: August 25, 2009
CONFERENCE PROCEEDINGS
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In Human-Robots collaborative assembly system, human workers have high mental work load induced by robot. However, this mental work load is not cleared enough. In this study, in order to evaluate mental work load induced by robot in Human-Robots collaborative assembly system, we detect the emotional sweating rates for physiological index and use the semantic differential method for subjective index. As the result, relationship between the motion of robots and mental work load was cleared by this experience.
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Yang Gao, Jeffrey/Too/Chuan Tan, Ryu Kato, Tamio Arai
Session ID: A83
Published: 2009
Released on J-STAGE: August 25, 2009
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The human operator′s skill level is an important design factor for the development of information support system in man-machine collaborative manufacturing. However, there is still no effective way to evaluate the operator′s skill level during practical working process in cell production. To quantify the operator′s skill level based on assembly tasks in cell production, a four-layer structure based on Dreyfus model of skill acquisition of skill level is defined in this paper. Furthermore, according to these characters which are in human worker centered production process, the main factors which influence the operator′s ability are studied to improve the information support system in cell production.
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Jeffrey/Too/Chuan Tan, Feng Duan, Ye Zhang, Ryu Kato, Tamio Arai
Session ID: A84
Published: 2009
Released on J-STAGE: August 25, 2009
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In a human-centered cell production system, various machines including robots are implemented to support the human operator with the goal of improving the overall productivity. In order to ensure the effectiveness of such system, the man and machine must be able to collaborate well throughout the assembly process. In this study, task modeling approach is used to develop assembly information to support the man-machine collaboration. Assembly information is provided to the human operator as guidance throughout the entire assembly operation. With the assembly information, the human operator is guided with assembly instruction together with the operation information of the total system including supporting devices. By this system, the operation sequence between human operator and machines can be coordinated well to ensure the effectiveness of the man-machine collaboration.
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Ye Zhang, Jeffrey/Too/Chuan Tan, Feng Duan, Ryu Kato, Tamio Arai
Session ID: A85
Published: 2009
Released on J-STAGE: August 25, 2009
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In this paper, the main aim is to obtain the most effective information support method which is suitable for the human operator. In order to study the design factors for information support me-thods, a cable-insert task experiment is conducted by using three information support methods. The result showed that assembly information provided in the human operator′s assembly area is the most effective method to improve the assembly productivity and reduce the human workload.
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Marina Fujita, Kei Watanabe, Ryu Kato, Tamio Arai
Session ID: A86
Published: 2009
Released on J-STAGE: August 25, 2009
CONFERENCE PROCEEDINGS
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In order to increase the productivity of a cell production system, assembly support in term of information plays an important role. However, large amount of information might cause high mental stress. For this reason, we had studied the relationship between information density and its induced effects on mental stress. In the experiments, from physiological parameter point of view, we had proven that the information density is proportional to the induced mental stress in information support.
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Masataka Nishio, Masao Sugi, Yewguan Soo, Jun Ota, Hiroshi Yokoi, Tami ...
Session ID: B01
Published: 2009
Released on J-STAGE: August 25, 2009
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Long time desk work causes cervico-omo-brachial syndrome and lumbago by muscle fatigue. In this research, we aim to develop a system that supports the workers to avoid cervico-omo-brachial syndrome and lumbago by decreasing their muscle fatigues. The system monitors the worker's muscle activities using the surface electromyography (sEMG) sensors, and supports the workers using self-adjustable desk and chair. APDF (Amplitude Probability Density Function) is applied to the evaluation index of muscle activities.As a fundamental experiment, muscle activities of workers invarious postures are evaluated by APDF analysis of sEMG data.
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Koji Teramoto
Session ID: B02
Published: 2009
Released on J-STAGE: August 25, 2009
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The objective of this research is to investigate an evaluation method for low-rigidity parts fixturing in machining. The research focuses on effects of variational fixturing such as eccentricity of load, geometrical error of contact surface, positioning error of fixturing equipments, and so on. Many researches have demonstrated the effectiveness of the FEM by demonstrating the evaluation of the fixturing error. Because one of the most important problems of low-rigidity parts fixturing is a variation of fixturing conditions. The paper proposes a fixturing variation model to evaluate the error-prone fixturing. Firstly, a representation method of varied contact states is introduced. Then, the fixturing variation is represented based on the contact states representation method. Features of proposed representation method are parametric representation of contact area and boundary conditions. A simple example for variational evaluation is explained as an application of the fixturing variation model.
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Kensuke Okita, Yusuke Maeda
Session ID: B03
Published: 2009
Released on J-STAGE: August 25, 2009
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Calibration of robot manipulators to obtain their DH parameters is very important to achieve high absolute accuracy. In this study, we propose a calibration method in which we use a laser displacement sensor attached on the end-effector of a robot to be calibrated; the robot aims at two fixed points with the laser in multiple configurationsand DH parameters of the robot are obtained as a result of nonlinear optimization.This method is based on one by Gatla et al., in which a laser pointer is used instead.Using additional distance information obtained from the sensor,our proposed method can achieve more accurate and practicalcalibration than the previous method. Some experimental resultson an industrial manipulator are shown.
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