著者

工藤 淳平 西田 進一 福留 一樹 本村 貢

出版者

一般社団法人 日本機械学会

雑誌

機械材料・材料加工技術講演会講演論文集 2009.17 (ISSN:2424287X)

巻号頁・発行日

pp._503-1_-_503-2_, 2009-11-06 (Released:2017-06-19)

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This paper describes a new melt drag process for producing magnesium alloy strip with boss. This magnesium alloy part is made by model melt drag process. Model melt drag process replace solidification roll with flat substrate. The substrate has circular cylinder cavity and oval cavity. Molten magnesium alloy AZ31 feed into this cavity and form boss. The diameters of cylindrical geometry are φ5, 7.5 and 10mm. The measurement of oval cavity is width 5mm, length 30mm, depth 3mm. It was possible in the achievement of the filling of shape by keeping the melt temperature high, and the contact time between molten metal and substrate long. As result of microstructure observation, the cast defect such as shrinkage cavity did not exist, and fine and uniformly grain size (50〜70μm) confirmed.

著者

滝島 勇希 吉田 一也 齊藤 梓 川上 勝 古川 英光

出版者

一般社団法人 日本機械学会

雑誌

機械材料・材料加工技術講演会講演論文集 2018.26 (ISSN:2424287X)

巻号頁・発行日

pp.403, 2018 (Released:2019-05-25)

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Various kinds of underwater exploration techniques have been developed. For instance, submersible research vehicles and autonomous underwater vehicle (AUV) have been used for observation of underwater conditions, in addition to the technique of fixed-point observation. However, such research vehicles and conventional AUV are difficult to control, are expensive, and are usually made with non-biodegradable materials such as metals. In contrast, jellyfish is the most efficient swimmers, traveling for long distance with saving energy by drifting in the ocean, its body can be decomposed after death, and safe for surrounding creatures. Therefore, we are developing the jellyfish-mimic AUV using a hydrogel. For designing a Jellyfish-mimic AUV robot, it is preferable to introduce a soft actuator driven by water pressure, as it requires low electric power and it is eco-friendly. In this study, we prototyped a Jellyfish-AUV robot using a soft material and a soft actuator. While it is ideal to make a robot body with hydrogel it is difficult to make the actuator with hydrogel.