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Effect of counter punch on formability in two-step compression forming for producing extremely deep cup
KAJIKAWA Shohei, UMEHARA Yutaro, KUBOKI Takashi, IIZUKA Takashi
download PDFAbstract. This paper presents two-step compression forming with a counter punch for producing an extremely deep cup with good shape accuracy. In the proposed method, the bottom shape is formed in the first step of the boss forming, and then the side wall is formed in the second step of the flange compression. The influence of the counter punch position in the boss forming was investigated to improve the shape accuracy of the bottom portion in this study. Appropriate counter punch position was predicted in finite element method (FEM) analysis. When the counter punch position was not appropriate, the forming defects, which were the local thinning and the backflow of the material, occurred. Based on the FEM result, the experiments were carried out. The experimental result agreed with the analysis result, and a deep cup with good shape accuracy was successfully formed under the optimum condition.
Keywords
Sheet Metal, Compression, Deep Cup, Sheet Forging, Aluminum, FEM
Published online 9/15/2024, 9 pages
Copyright © 2024 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA
Citation: KAJIKAWA Shohei, UMEHARA Yutaro, KUBOKI Takashi, IIZUKA Takashi, Effect of counter punch on formability in two-step compression forming for producing extremely deep cup, Materials Research Proceedings, Vol. 44, pp 616-624, 2024
DOI: https://doi.org/10.21741/9781644903254-66
The article was published as article 66 of the book Metal Forming 2024
Content from this work may be used under the terms of the Creative Commons Attribution 3.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
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