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首页> 外文会议>Symposium on Cellular Metals and Polymers; 20041012-14; Furth(DE) >Casting of metallic sponges using rapid prototyping
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Casting of metallic sponges using rapid prototyping

机译：使用快速原型铸造金属海绵

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摘要

Cellular Metals show a great potential for a wide range of technical applications due to their unique mechanical and physical properties. Metallic sponges have found first applications in heat-exchangers and filters, but hitherto neither open nor closed cell materials are commercially used for the manufacture of light-weight structural components. The major obstacle is the irregular structure of most cellular metals, induced by the limitations of the respective manufacturing method, which hinders the exact prediction of the material properties. Therefore, improvement of the production processes, the three-dimensional characterisation of the cellular structures and the development of appropriate methods for mechanical testing are subjects of current research activities. A new approach for the optimisation of metallic open-cell sponges is rendered possible by the use of rapid-prototyping. Almost arbitrary structures, tailored to the demands of the intended application, can be directly fabricated from CAD data sources. Software systems for structural optimisation can play a decisive role in the process of designing these structures, which can be directly used as lost models in the investment casting process. The underlying casting techniques have been developed in the Foundry Institute of Aachen University during several research projects. They allow for the use of a wide range of alloys as raw material for the fabrication of cellular metals. This technique is now used for the structural optimisation of metallic sponges.
机译：蜂窝金属由于其独特的机械和物理特性，在广泛的技术应用中显示出巨大的潜力。金属海绵首先发现在热交换器和过滤器中的应用，但是迄今为止，开孔或闭孔材料都没有在商业上用于制造轻型结构部件。主要障碍是大多数蜂窝金属的不规则结构，这是由各自制造方法的局限性引起的，这阻碍了材料特性的准确预测。因此，生产工艺的改进，细胞结构的三维表征以及机械测试的适当方法的开发是当前研究活动的主题。通过使用快速成型技术，可以实现一种优化金属开孔海绵的新方法。可以根据CAD数据源直接制造满足预期应用需求的几乎任意结构。用于结构优化的软件系统可以在设计这些结构的过程中起决定性的作用，可以将其直接用作熔模铸造过程中的损失模型。在几个研究项目中，亚琛大学铸造研究所已经开发了基础铸造技术。它们允许使用多种合金作为制造多孔金属的原材料。现在，该技术用于金属海绵的结构优化。

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