Joining by forming of bi-material collector coins with rotating elements

IF 3.8 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY
Pedro M.S. Rosado , Rui F.V. Sampaio , João P.M. Pragana , Ivo M.F. Bragança , Carlos M.A. Silva , Paulo A.F. Martins
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引用次数: 0

Abstract

This paper presents a novel manufacturing process for producing innovative bi-material collector coins with free-rotating inner elements. The inner elements are fabricated using additive manufacturing, enabling the creation of coins with complex and intricate geometric details that would be unattainable using conventional wrought materials. The outer elements (rings) are metallic, and this study addresses the challenge of securely connecting them to the inner elements through force-closed mechanisms formed during the coin minting process. Finite element modeling, combined with experimentation on bi-material (polymer-metal and metal-metal) coins, is employed to analyze material flow, assess minting forces, and evaluate contact pressures at the force-closed joints. The analysis ensures that adequate destructive forces are required to separate the inner elements from the rings and provides insights into selecting the appropriate process parameters for simultaneous coining and joining. The successful production of the first bi-material collector coin prototypes with free-rotational inner elements validates the overall development.
以成型方式连接带有旋转元件的双材料收藏硬币
本文介绍了一种新颖的制造工艺,用于生产具有自由旋转内部元素的创新型双材料收藏硬币。内部元件采用增材制造工艺制造,因此能制造出具有复杂和错综复杂几何细节的硬币,而传统的锻造材料是无法实现这些细节的。外部元件(环)是金属的,本研究要解决的难题是如何通过硬币铸造过程中形成的力闭合机制将它们与内部元件安全地连接起来。有限元建模与双材料(聚合物-金属和金属-金属)硬币实验相结合,用于分析材料流动、评估铸造力,以及评估力闭合连接处的接触压力。该分析确保需要足够的破坏力才能将内部元件与圆环分离,并为选择适当的工艺参数以同时进行铸币和接合提供了启示。首枚带有自由旋转内部元件的双材料收藏硬币原型的成功生产验证了整个开发过程。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
7.10
自引率
9.80%
发文量
58
审稿时长
44 days
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