Comparative Study on Metal Coin Cancelling Methods, Using 3D Modelling and FEM Analysis
10.15660/AUOFMTE.2023-1.3665
C C Gavrila, M T Lates
cgavrila@unitbv.ro
Volume XXXII, 2023/1
Along time, many minted coins were withdrawn from circulation, being replaced with new ones. The returned obsolete metal coins were melted in order to use the alloy for other purpose. Between the withdrawing and melting, some of the metal coins were cancelled by destruction of the original shape and dimension, using some adequate tools. The paper presents some aspects about the cancelling method used on the Romanian old nickel coins. In the first part of the paper, the introductive aspects about the used cancelling methods are presented; also, there are presented some examples. In the paper second part, the simplified 3D model computed for the cancelling dies, respectively the coin, are presented. Then, there are introduced the assembled models, corresponding to each cancelling case, which consist by the obverse and reverse cancelling dies, having the coin inside them. For the each model, the finite element analysis is realized and is achieved for different initial conditions. The final part of the paper presents the analysis results and also the conclusions.
metal coin, fem
ISSN 1583-0691, CNCSIS "Clasa B+"