{"created":"2023-05-15T11:02:41.651878+00:00","id":76,"links":{},"metadata":{"_buckets":{"deposit":"fdd589db-c1bc-4ebc-a0ae-4f1fa23d9f90"},"_deposit":{"created_by":3,"id":"76","owners":[3],"pid":{"revision_id":0,"type":"depid","value":"76"},"status":"published"},"_oai":{"id":"oai:iot.repo.nii.ac.jp:00000076","sets":["1:9"]},"author_link":["213","211","214","210","212","215"],"item_10002_biblio_info_7":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2012","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"3","bibliographicPageEnd":"37","bibliographicPageStart":"31","bibliographic_titles":[{"bibliographic_title":"ものつくり大学紀要"},{"bibliographic_title":"The Bulletin of Institute of Technologists","bibliographic_titleLang":"en"}]}]},"item_10002_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"Ebara Turbomachinery Corporation　In the process of manufacturing aluminum heat exchangers, they usually are brazed in the furnace　filled with nitrogen below 20 ppm oxygen concentration. This paper proposes a new method to make the environment above.\nFirstly, the chamber (as a model of the furnace) is evacuated to a certain pressure. Secondary, it is filled with nitrogen gas. And then, it is evacuated again to 20 ppm. This method reduces both the amount of nitrogen gas consumption and the time until the oxygen concentration falls enough. Furthermore, this time\nis found to be the shortest when the initial degree of vacuum p₁ is the same as the secondary p₂.\n","subitem_description_type":"Abstract"},{"subitem_description":"本研究ではこの従来式の窒素置換法を改良するために，窒素置換専用の前室を設けて以下に記す手法で窒素置換を行い，その後ＮＢ炉内に投入する方法を提案する．その手法とは，窒素ガス噴入前に前室を一旦真空状態にした後に窒素を噴入するものである．ただし，要求される低酸素濃度を真空排気のみによって実現することは，ある程度の真空度と相応の時間，そしてＶＢ炉に匹敵する頑強な設備を必要とする．そこで本研究ではこの作業を2回に分けて行う新しい方法³⁾ （真空2回排気法）を採用することにした．まず前室内を比較的低い真空度の状態まで排気する（短時間で完了）．そしてその後窒素ガス噴入によって前室内を大気圧近くまで復圧し（噴入窒素量は炉容積程度），再度排気を行う．ここに至っては，前室内はすでに窒素ガスによって希釈されているので，やはり比較的に低い真空度までの排気でも容易に20 ppm以下の酸素濃度に到達可能である．2回目の排気の後にさらに窒素ガスを噴入し再び大気圧に戻せばロウ付けのための準備は完了である．\nこの方法によれば真空排気の際の前室内圧力低下は1,000 Pa程度までであり，なおかつ直後には窒素によって大気圧まで復圧されるため低圧に晒される時間はきわめて短い．さらに前室は炉に比して小型に建造可能なため，ＶＢ炉のような高価な設備を用意する必要はない．\n本稿では上述の真空2回排気法によって酸素濃度20 ppmに到達する時間を大幅に短縮できること，そして従来のＮＢ炉に比して窒素使用量も劇的に削減できることを模型実験の結果に基づいて報告する．さらに，この到達時間を最小にする条件についても考察を加える．","subitem_description_type":"Abstract"}]},"item_10002_publisher_8":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"学校法人ものつくり大学"}]},"item_10002_source_id_9":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"2185-3746","subitem_source_identifier_type":"ISSN"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"香村, 誠"},{"creatorName":"コウムラ, マコト","creatorNameLang":"ja-Kana"}],"nameIdentifiers":[{"nameIdentifier":"210","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"吉川, 徹"},{"creatorName":"ヨシカワ, トオル","creatorNameLang":"ja-Kana"}],"nameIdentifiers":[{"nameIdentifier":"211","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"松本, 光太郎"},{"creatorName":"マツモト, コウタロウ","creatorNameLang":"ja-Kana"}],"nameIdentifiers":[{"nameIdentifier":"212","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Makoto, KOMURA","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"213","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Toru, YOSHIKAWA","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"214","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Kotaro, MATSUMOTO","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"215","nameIdentifierScheme":"WEKO"}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2017-06-06"}],"displaytype":"detail","filename":"bulletin_53.pdf","filesize":[{"value":"1.5 MB"}],"format":"application/pdf","licensetype":"license_11","mimetype":"application/pdf","url":{"label":"ラジエタNB ロウ付け炉における酸素濃度低減に関する研究","url":"https://iot.repo.nii.ac.jp/record/76/files/bulletin_53.pdf"},"version_id":"71d5f852-e771-4a8e-8759-27bf6549ee8b"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"Nocolok Brazing Furnace","subitem_subject_scheme":"Other"},{"subitem_subject":"Oxygen Concentration","subitem_subject_scheme":"Other"},{"subitem_subject":"Vacuum Suction","subitem_subject_scheme":"Other"},{"subitem_subject":"Energy Saving","subitem_subject_scheme":"Other"},{"subitem_subject":"Environmental Benign Manufacturing","subitem_subject_scheme":"Other"},{"subitem_subject":"Nocolok Brazing Furnace","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"Oxygen Concentration","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"Vacuum Suction","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"Energy Saving","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"Environmental Benign Manufacturing","subitem_subject_language":"en","subitem_subject_scheme":"Other"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"jpn"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"departmental bulletin paper","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_title":"ラジエタNB ロウ付け炉における酸素濃度低減に関する研究","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"ラジエタNB ロウ付け炉における酸素濃度低減に関する研究"},{"subitem_title":"Decrease of Oxygen Concentration in Nocolok Flux Brazing Furnace\\nfor Aluminum Heat Exchanger","subitem_title_language":"en"}]},"item_type_id":"10002","owner":"3","path":["9"],"pubdate":{"attribute_name":"公開日","attribute_value":"2017-06-06"},"publish_date":"2017-06-06","publish_status":"0","recid":"76","relation_version_is_last":true,"title":["ラジエタNB ロウ付け炉における酸素濃度低減に関する研究"],"weko_creator_id":"3","weko_shared_id":3},"updated":"2023-05-15T11:15:19.657743+00:00"}