| Issue |
Manufacturing Rev.
Volume 5, 2018
|
|
|---|---|---|
| Article Number | 3 | |
| Number of page(s) | 12 | |
| DOI | https://doi.org/10.1051/mfreview/2018007 | |
| Published online | 23 May 2018 | |
Research Article
Finite element design procedure for correcting the coining die profiles
1
INCM, Imprensa Nacional Casa da Moeda,
Av. António José de Almeida,
1000-001
Lisboa, Portugal
2
IDMEC, Instituto Superior Técnico, Universidade de Lisboa,
Av. Rovisco Pais,
1049-001
Lisboa, Portugal
* e-mail: pmartins@tecnico.ulisboa.pt
Received:
15
February
2018
Accepted:
16
March
2018
This paper presents a new finite element based design procedure for correcting the coining die profiles in order to optimize the distribution of pressure and the alignment of the resultant vertical force at the end of the die stroke. The procedure avoids time consuming and costly try-outs, does not interfere with the creative process of the sculptors and extends the service life of the coining dies by significantly decreasing the applied pressure and bending moments. The numerical simulations were carried out in a computer program based on the finite element flow formulation that is currently being developed by the authors in collaboration with the Portuguese Mint. A new experimental procedure based on the stack compression test is also proposed for determining the stress-strain curve of the materials directly from the coin blanks.
Key words: Coining / dies / finite element modelling / experimentation
© P. Alexandrino et al., Published by EDP Sciences 2018
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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