In situ observation of re-lubrication of die–workpiece interface during forging with ram pulsation

Matsumoto, Ryo; Nakamura, Yusaku; Utsunomiya, Hiroshi

doi:https://doi.org/10.1016/j.jmapro.2023.06.017

In situ observation of re-lubrication of die–workpiece interface during forging with ram pulsation

Matsumoto, Ryo; Nakamura, Yusaku; Utsunomiya, Hiroshi

Journal of Manufacturing Processes, 2023, 101, 675-686

アクセス数:475件（2025-08-28 17:24 集計）

固定URL: https://hdl.handle.net/11094/93993

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タイトル	In situ observation of re-lubrication of die–workpiece interface during forging with ram pulsation
著者	NRID 1000050362645 1000050362645 ORCID 0000-0002-4477-2139 0000-0002-4477-2139 researchmap permalink ryo-matsumoto ryo-matsumoto Scopus Author ID 35512063000 35512063000 著者名 Matsumoto, Ryo
	著者名 Nakamura, Yusaku
	NRID 1000080252584 1000080252584 researchmap permalink read0042799 read0042799 Scopus Author ID 7102139699 7102139699 著者名 Utsunomiya, Hiroshi
キーワード等	Extrusion
	Forging
	In situ observation
	Lubrication
	Ram pulsation
内容	Matsumoto R., Nakamura Y., Utsunomiya H.. In situ observation of re-lubrication of die–workpiece interface during forging with ram pulsation. Journal of Manufacturing Processes 101, 675 (2023); https://doi.org/10.1016/j.jmapro.2023.06.017.
抄録	With the aim of investigating the re-lubrication behavior under ram pulsation, the contact interface between die and workpiece was in situ observed during cold forging. For in situ observation, the die was partly made of transparent ceramic glass, while the workpiece was used commercially pure aluminum. A microscope and high-speed camera were used for observing and recording the contact interface. For analyzing the lubrication behavior, visibility of polybutene lubricant was enhanced by oil-soluble black colorant, and the brightness value of the observed image was used. Obtained results indicated that the lubricant was thickened by approximately 1–10 μm at each ram pulsation through the ram retreat movement in forging with complete unloading ram pulsation. The re-lubrication behavior during ram pulsation was discussed by the thickness of the lubricant, forming load, deformation, and surface roughness of the workpiece.
出版者	Elsevier Ltd
収録物名	Journal of Manufacturing Processes
巻(号)	101
ページ	675-686
刊行年月	2023-09-08
言語	英語
ハンドルURL	https://hdl.handle.net/11094/93993
PISSN	15266125
関連情報 (isVersionOf)	DOI (出版社版) https://doi.org/10.1016/j.jmapro.2023.06.017
アクセス権	embargoed access
権利情報	© 2023. This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/
権利情報	The full-text file will be made open to the public on 8 September 2025 in accordance with the publisher's policy.
出版タイプ	Accepted Manuscript
カテゴリ	学術雑誌論文 Journal Article

資源タイプ	学術雑誌論文
ローカル資源タイプ	学術雑誌論文
DCMI資源タイプ	text
DCTERMS.bibliographicCitation	Journal of Manufacturing Processes. 2023, 101, p. 675-686
DC.title	In situ observation of re-lubrication of die–workpiece interface during forging with ram pulsation
DC.creator	Matsumoto, Ryo
	Nakamura, Yusaku
	Utsunomiya, Hiroshi
DC.publisher	Elsevier Ltd
DC.language' scheme='DCTERMS.RFC1766	英語
DC.type' scheme='DCTERMS.DCMIType	text
DCTERMS.issued' scheme='DCTERMS.W3CDTF	2023-09-08
DC.identifier	https://doi.org/10.1016/j.jmapro.2023.06.017
DC.subject	Extrusion
	Forging
	In situ observation
	Lubrication
	Ram pulsation
DC.description	Matsumoto R., Nakamura Y., Utsunomiya H.. In situ observation of re-lubrication of die–workpiece interface during forging with ram pulsation. Journal of Manufacturing Processes 101, 675 (2023); https://doi.org/10.1016/j.jmapro.2023.06.017.
DCTERMS.abstract	With the aim of investigating the re-lubrication behavior under ram pulsation, the contact interface between die and workpiece was in situ observed during cold forging. For in situ observation, the die was partly made of transparent ceramic glass, while the workpiece was used commercially pure aluminum. A microscope and high-speed camera were used for observing and recording the contact interface. For analyzing the lubrication behavior, visibility of polybutene lubricant was enhanced by oil-soluble black colorant, and the brightness value of the observed image was used. Obtained results indicated that the lubricant was thickened by approximately 1–10 μm at each ram pulsation through the ram retreat movement in forging with complete unloading ram pulsation. The re-lubrication behavior during ram pulsation was discussed by the thickness of the lubricant, forming load, deformation, and surface roughness of the workpiece.
DC.rights	© 2023. This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/
DC.rights	The full-text file will be made open to the public on 8 September 2025 in accordance with the publisher's policy.
DC.format	93993
citation_title	In situ observation of re-lubrication of die–workpiece interface during forging with ram pulsation
citation_author	Matsumoto, Ryo
	Nakamura, Yusaku
	Utsunomiya, Hiroshi
citation_publisher	Elsevier Ltd
citation_language	英語
citation_date	2023-09-08
citation_journal_title	Journal of Manufacturing Processes
citation_volume	101
citation_firstpage	675
citation_lastpage	686
citation_doi	https://doi.org/10.1016/j.jmapro.2023.06.017
citation_public_url	https://hdl.handle.net/11094/93993

In situ observation of re-lubrication of die–workpiece interface during forging with ram pulsation

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