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論文

論文
古本, 達明 ; 上田, 隆司 ; 細川, 晃 ; Abdullah, Yassin ; 阿部, 諭
出版情報: 精密工学会誌.  74  pp.836-840,  2008-08-01.  精密工学会
URL: http://hdl.handle.net/2297/12033
概要: 金沢大学理工研究域 機械工学系<br />In order to manufacture the part of a small lot at lower cost and shorter lead-time, various techniques, such as a rapid tooling, reverse engineering and high speed milling, are proposed. Recently, milling-combined laser metal sintering system, which is the device of sintering the metal powder and milling the sintered metal with end mill at the one process, has been developed to produce the injection molding dies. In this report, the sintering characteristics of the metal powder used for rapid tooling with Yb fiber laser are described. Relationship between the scanning speed of laser beam and the width of sintered material on the different surface plate are investigated. Moreover, the cross section of sintered material is analyzed with EPMA and cutting force is measured by the dynamometer in the various conditions. As a result, it was shown that the suitable irradiation energy for laser sintering should be selected to obtain the good shaped structure, which is occurred the melting, the cohesion and the solidification of the metal powder repeatedly. The shape of sintered material is formed like a spherical in the conditions of too much energy supply, and not formed partially in the conditions of a little energy supply. The melted metal powder with the generated heat by laser irradiation alloyed with the plate surface on the process of the solidification. The specific cutting force of sintered material on the surface with sandblast is quite larger than that on the standard surface by the difference of the wetting of melted metal powder. 続きを見る
2.

論文

論文
古本, 達明 ; 上田, 隆司 ; 青木, 慎太郎 ; 葛西, 惇士 ; 細川, 晃 ; 立矢, 宏
出版情報: Nihon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C.  75  pp.2810-2815,  2009-01-01.  日本機械学会
URL: http://hdl.handle.net/2297/20333
概要: 金沢大学理工研究域機械工学系<br />In this paper, a measurement of the impulse stress induced by a laser irradiation on the extra cted human enamel was proposed. The dynamic load induced in the specimen by using elastic wave propagation in the long bar made of aluminum alloy was measured. The human enamel was grinded with the grain of # 600, and fixed on the edge of the long bar. The titanium dioxide powder whose average diameter is 1 urn was applied to the enamel surface so as to absorb the irradiation laser beam effectively. The laser induced stress intensity was evaluated from the dynamic strain measured by small semiconductor strain gauges attached on the long bar. As a result, the impulse stress induced on the human enamel increased with increasing the laser energy, and related to the volume of the prepared cavity. The laser induced stress for the removal of the unit volume of human enamel was 0.03 Pa/mm<sup>3</sup>. 続きを見る
3.

論文

論文
榎本, 啓士 ; 稗田, 登 ; 上田, 隆司 ; 木村, 繁男
出版情報: 工学・工業教育研究講演会講演論文集.  pp.537-538,  2004-07-30.  日本工学教育協会 = Japanese Society for Engineering Education
URL: http://hdl.handle.net/2297/32543
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論文

論文
高本, 与志久 ; 木村, 繁男 ; 上田, 隆司
出版情報: 工学・工業教育研究講演会講演論文集.  pp.483-484,  2004-07-30.  日本工学教育協会 = Japanese Society for Engineering Education
URL: http://hdl.handle.net/2297/32548
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論文

論文
細川, 晃 ; 上田, 隆司 ; 榎本, 啓士 ; 木村, 繁男 ; 岡島, 厚
出版情報: 工学・工業教育研究講演会講演論文集.  pp.431-432,  2003-09-04.  日本工学教育協会 = Japanese Society for Engineering Education
URL: http://hdl.handle.net/2297/32565
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論文

論文
古本, 達明 ; 上田, 隆司 ; 青木, 慎太郎 ; 葛西, 惇士
出版情報: 砥粒加工学会誌 = Journal of the Japan Society of Grinding Engineers.  52  pp.595-600,  2008-10-01.  砥粒加工学会
URL: http://hdl.handle.net/2297/12036
概要: 金沢大学理工研究域 機械工学系<br />Nd:YAGレーザを用いた歯科治療では,出射したレーザ光は石英光ファイバを用いて口腔内部に伝送され,レーザ光をレンズで集光させることなく患部に照射して治療が行われる.これまで,治療部位に 対してレーザ光の吸収を効果的に行う手法として,伝送用光ファイバの先端を酸化チタン乳液から製作したペレットで加工する手法を提案し,加工ファイバ先端におけるエネルギ分配割合を求めてきた.本研究では,酸化チタン粉末に加えて,ジルコニア粉末,二酸化ケイ素粉末,二酸化マンガン粉末を用いて伝送用光ファイバ先端の加工実験を行い,加工ファイバ先端から出射される直進レーザ光の割合を求め,各粉末が石英ファイバ先端の加工特性に与える影響について調べた.その結果,ファイバ先端の加工性は,ペレットに含有された粉末濃度が高いほど,また,加工するレーザエネルギが大きいほど優れていることが明らかとなった.また,ファイバ先端の加工条件を同一とした場合,二酸化チタン粉末含有ペレットが最も加工性に優れ,ジルコニア粉末,二酸化マンガン粉末の順に加工性が悪くなり,二酸化ケイ素粉末ではファイバ先端がほとんど加工されないことがわかった. 続きを見る
7.

論文

論文
嵐, 知哉 ; 古本, 達明 ; 上田, 隆司 ; 細川, 晃 ; 田中, 隆太郎
出版情報: 日本機械学会講演論文集.  44  pp.231-232,  2007-03-01.  日本機械学会 = The Japan Society of Mechanical Engineers
URL: http://hdl.handle.net/2297/27060
概要: 金沢大学理工研究域機械工学系
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論文

論文
木村, 繁男 ; 上田, 隆司 ; 細川, 晃
出版情報: 工学・工業教育研究講演会講演論文集.  pp.351-352,  2001-07-18.  日本工学教育協会 = Japanese Society for Engineering Education
URL: http://hdl.handle.net/2297/32555
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論文

論文
山崎, 光悦 ; 近田, 康夫 ; 上田, 隆司 ; 米山, 猛
出版情報: 工学・工業教育研究講演会講演論文集.  pp.317-320,  2000-07-19.  日本工学教育協会 = Japanese Society for Engineering Education
URL: http://hdl.handle.net/2297/32554
10.

論文

論文
田中, 隆太郎 ; 井上, 豪 ; 中川, 智博 ; 細川, 晃 ; 古本, 達明 ; 上田, 隆司
出版情報: 日本機械学会論文集C編 / Nihon Kikai Gakkai Ronbunshu, C Hen / Transactions of the Japan Society of Mechanical Engineers, Part C.  77  pp.3193-3198,  2011-01-01.  日本機械学会 = The Japan Society of Mechanical Engineers
URL: http://hdl.handle.net/2297/31412
概要: The authors have reported that the micro wavy surface formed by machining combined with laser heat treatment have higher static coefficient of friction compared with the surface finished by polishing or cutting. Therefore, this study was carried out to clarify the surface formation mechanism in order to control micro wavy height and the influence of lubricant viscosity on static frictional force. In practical use, high viscosity lubricant is used in wet brake to prevent oil leakage. At cutting after laser heat treatment, when the higher thrust force was, the higher micro wavy height was obtained. Thus, decreasing cutting speed or increasing feed rate, the obtained micro wavy height became higher. The static coefficient of friction of surface finished by polishing was decreasing with lubricant viscosity. This tendency was also seen at micro wavy surface. However, the static coefficient of friction of micro wavy surface was constantly higher than polished surface regardless of lubricant viscosity. © 2011 The Japan Society of Mechanical Engineers. 続きを見る