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Simulation of Powder Flow in a Die Shoe

机译：模具鞋中粉末流动的模拟

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摘要

The flow properties of powder are poorly understood even though Powder Metallurgy (PM) and particle related industries are currently experiencing a massive growth. In this paper, we examine the flow of powder inside a die shoe, which is used for die filling. Numerical experiments have been conducted which allows a deeper understanding of the die-filling process even before the actual die filling takes place. The influence of particle shapes in the flow has been investigated using numerical models based on the discrete element method (DEM) in which particles of three different geometric compositions were considered. It is found that mound formation took place in all the three particle shape compositions. However, there are distinct variations in particle arrangement and voids formation. Simulations show that circular particles are packed closer together but polydispersed disks experienced much more random and turbulent flow. The most voids appeared in particles composed of polydispersed ellipses, followed by polydispersed disks and finally monodispersed disks. Particle shapes certainly have an influence in the quality of a die filling, thus density variation within a die fill. The numerical study provides new insights, which enhance our understanding of the mechanism of die filling even before the process begins.
机译：尽管粉末冶金（PM）和与颗粒相关的行业目前正经历着巨大的增长，但人们对粉末的流动性了解甚少。在本文中，我们检查了用于模头填充的模座内部的粉末流动。进行了数值实验，即使在实际的模具填充之前，也可以更深入地了解模具填充过程。已经使用基于离散元素方法（DEM）的数值模型研究了颗粒形状对流动的影响，其中考虑了三种不同几何组成的颗粒。发现在所有三种颗粒形状的组合物中都发生了土堆的形成。但是，颗粒排列和空隙形成存在明显的差异。模拟表明，圆形颗粒堆积得更紧密，但多分散的盘却经历了更多的随机和湍流。最多的空隙出现在由多分散椭圆形组成的颗粒中，随后是多分散圆盘，最后是单分散圆盘。颗粒形状当然会影响模具填充的质量，从而影响模具填充内的密度变化。数值研究提供了新的见解，甚至在过程开始之前，就增强了我们对模具填充机理的理解。

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  • 来源
  • 会议地点 Corfu Island(GR);Corfu Island(GR);Corfu Island(GR);Corfu Island(GR)
  • 作者

    M. RADZIM YUNUS; D. T. GETHIN; R. HASHIM;

  • 作者单位

    Faculty of Mechanical and Manufacturing Engineering Universiti Tun Hussein Onn Malaysia 86400, Park Raja, Batu Pahat, Johor Darul Ta'zim MALAYSIA;

    College of Engineering, Swansea University, Swansea University Singleton Park, Swansea, SA2 8PP Wales UK;

    Faculty of Computer Science and Information Technology Universiti Tun Hussein Onn Malaysia 86400, Park Raja, Batu Pahat, Johor Darul Ta'zim MALAYSIA;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 教育学;
  • 关键词

    die filling; paniculate flow; discrete element method; die shoe;

    机译：充模ic流离散元法死鞋;

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