Elucidation of Mechanism Underlying Workpiece Jump in Hammer Forging
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- NIHO Takayoshi
- 東京大学大学院工学系研究科
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- NAGATO Keisuke
- 東京大学大学院工学系研究科
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- NAKAO Masayuki
- 東京大学大学院工学系研究科
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- OHTANI Toshiro
- (株)小松製作所
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- MIYOSHI Koji
- (株)小松製作所
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- KONDO Shuhei
- (株)小松製作所
Bibliographic Information
- Other Title
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- ハンマ鍛造におけるワーク跳躍メカニズムの解明
- ハンマ タンゾウ ニ オケル ワーク チョウヤク メカニズム ノ カイメイ
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Abstract
<p>During the process of drop hammer forging, workpieces sometimes jump after strikes. The present research investigates the mechanism of the workpiece jump by means of experiments and numerical simulations. In the experiments, workpieces were struck by vertical symmetrical flat dies or vertical asymmetrical dies. A high-speed camera was used to measure the workpiece deformation, the position of workpieces during jumping and the position of the dies. Strain of lower dies and structures of the hammer were measured by strain gauges. Vibration of the antirattler under the hammer, elastic vibration of lower dies and structures of the hammer, and contact area between workpieces and dies were analyzed by numerical simulations. The results indicate that workpieces jump by adhesive force between workpieces and dies, and by elastic vibration of lower dies and structures of the hammer.</p>
Journal
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- Journal of the Japan Society for Technology of Plasticity
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Journal of the Japan Society for Technology of Plasticity 62 (721), 21-28, 2021
The Japan Society for Technology of Plasticity
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Details 詳細情報について
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- CRID
- 1390568772523454592
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- NII Article ID
- 130007990775
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- NII Book ID
- AN00135062
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- ISSN
- 18820166
- 00381586
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- NDL BIB ID
- 031318281
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed