基于EDEM的瓷砖粉料压制成型过程仿真分析与研究

发布时间：2018-03-31 09:41

本文选题：离散单元法　切入点：EDEM　出处：《广东工业大学》2015年硕士论文

【摘要】：陶瓷材料因其各方面性能都很优异,而在越来越多的领域里被使用。日常生活中最为常见的则是瓷砖。本文在阅读大量国内外文献的基础上,首先对瓷砖的各种压制技术进行了阐述,包括相应技术的结构及原理。在此基础上对数值模拟方法在粉料压制成型方面的应用作了详细的介绍,特别是重点介绍了基于离散单元法的数值模拟方法。目前,陶瓷粉末成型工艺和模具形状尺寸基本上都是根据工人经验,或者是通过反复试验的方式来确定的,这不仅成本高而且生产效率低下。随着现代计算机技术的不断发展,应用数值模拟方法则能够很好的解决以上问题。本文在国内首次将基于离散单元法的大型数字模拟软件EDEM应用于瓷砖粉料的模压成型过程中,得出了粉料压制成型的完整模拟过程,并在该基础上对模冲在压制过程中受力与不同压制速度间的关系进行了分析。最后通过多组不同的仿真实验,对影响压制坯体的密度的因素作了详细分析,包括模压速度、模具尺寸及瓷砖粉体颗粒尺寸。本文针对离散单元法的分析,特别是针对离散元方法中的硬球模型和软球模型进行的分析具有一定的学术意义。对于粉料压制成型过程方法的分析具有一定的工程实用价值。尤其是首次将基于离散元软件EDEM的仿真试验方法应用于瓷砖的粉料压制过程中,可以为今后EDEM在粉料压制成型方面的应用提供一定的指导作用。
[Abstract]:Ceramic materials because of its excellent performance in all aspects, and is used in more and more fields in daily life. The most common is the tile. Based on reading a large number of domestic and foreign literature, first of all ceramic tile pressing technology is introduced, including the structure and principle of the corresponding technology based. The numerical simulation method in the application of the powder molding is introduced in detail, especially focuses on the numerical simulation method based on discrete element method. At present, the ceramic powder molding process and mold shape and size are basically according to the experience of workers, or is determined by trial and error method, the not only the high cost and low production efficiency. With the continuous development of modern computer technology, the application of numerical simulation method can well solve the above problems. In this paper, for the first time in China based on the discrete single The molding process of large scale digital element method simulation software EDEM is applied to the ceramic powder, the complete simulation process of powder press molding, and punching in the pressing process by analyzed the relationship between force and speed of different pressing die on this basis. Finally, through different sets of simulation experiment. A detailed analysis of influence factors on the suppression of the density of green body, including molding speed, particle size and powder size of die tiles. This paper analyses for the discrete element method, especially has certain academic significance for the analysis of discrete element method in the hard sphere model and soft sphere model. It has some practical value for the analysis of powder pressing process. Especially the initial application of simulation test method of discrete element software EDEM based on the ceramic powder pressing process, for the future of EDEM in powder press The application of molding provides a certain guiding role.

【学位授予单位】：广东工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TQ174.765

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