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| 1.
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論文
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山田, 外史 ; 池畑, 芳雄 ; 林, 亮平 ; Yamada, Sotoshi ; Ikehata, Yoshio ; Hayashi, Ryohei
概要:
Induction heating type hyperthermia treatment needs both high magnetic fields (> 2 mT) and a few hundred kHz inside of a
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body to heat magnetic particles and implant materials up to 43°C. We proposed the double-pancake type coils sandwiching human body。 The exciting coils of human scale could generate magnetic fields with both magnitude and frequency required to a medical treatment. In order to make magnetic fields inside a deep body further increase, we proposed that a back yoke as magnetic materials was added to both coils. The paper discussed magnetic- and electrical-circuit characteristics of the coils with a magnetic sheet and ferrite as back yoke.<br />Special Issue on The 23rd MAGDA Conference in Takamatsu (MAGDA2014)
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| 2.
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田中, 隆太郎 ; 林, 勇伝 ; 田邉, 一真 ; 上田, 隆司 ; 細川, 晃
概要:
This study deals with the trial for improvement of chip controllability in turning with selective laser heat treatment for workpiece. Selective heat treatment for carbon steel JIS S45C was carried out with Nd:YAG laser which
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could be transmitted through an optical fiber and shows higher absorption rate against carbon steels than CO2 laser. In turning of these selective laser heat threatened carbon steel, the chip form changed regular curl from irregular curl and chip breakability was improved compared with non-laser treated carbon steel. Surface roughness was obviously smaller comparing with non-laser treated carbon steel. Especially in the case that the depth of cut was larger, the surface roughness was smaller. As for cutting force, the principal force was slightly smaller, but the thrust force and feed force were almost the same. The cutting temperature was slightly lower. The tool wear was almost same as that in the case of non-laser treated carbon steel.
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論文
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佐藤, 彰 ; 黒部, 利次 ; 広崎, 憲一
概要:
Edge-chipping yielded by grooving of ferrite using thin diamond blade is responsible for a deterioration of an electro-magnetic property of the magnetic head. Work damage such as chipping may be closely related to the mechanical
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property of bonding material of thin diamond blade. Edge-chipping yielded by grooving is examined using three types of thin diamond blade whose are made of metal, resin-metal and resin bonded materials. This paper focusses on the relationship between work damage and grinding force. Experiments show that chipping size is influenced by grinding conditions and mechanical property of bonding materials. It is found that the value of maximum normal grinding force per grain is made up of good correlation for edge-chipping size.
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