粒料3D打印机机头传热结构优化设计
发布时间：2019-05-11 04:32
【摘要】：在熔融沉积成型制造技术中,热流道及喷头的温度场对聚合物的流动及沉积有很大影响。针对现有的聚合物熔体微分粒料3D打印机,建立机头的三维模型,运用有限元分析的方法得到其温度场分布。模拟结果表明,热源与喷头之间存在较大温差,且热流道温度分布不均匀。针对以上结构的缺点,提出机头结构的优化方案,并对其所用材料进行改进。对优化后的机头再次进行有限元热分析,分析结果表明,优化后的机头热源与喷头之间的温差显著减小,且热流道的温度分布趋于均匀。因此,3D打印机机头结构优化方案对于聚合物熔体的稳定输送及沉积成型有重要意义。
[Abstract]:In melt deposition manufacturing technology, the temperature field of hot runner and nozzle has a great influence on the flow and deposition of polymer. Aiming at the existing polymer melt differential particle 3D printer, the three-dimensional model of the machine head is established, and the temperature field distribution is obtained by finite element analysis. The simulation results show that there is a large temperature difference between the heat source and the nozzle, and the temperature distribution of the hot runner is uneven. In view of the shortcomings of the above structure, the optimization scheme of the nose structure is put forward, and the materials used are improved. The finite element thermal analysis of the optimized head is carried out again. The results show that the temperature difference between the optimized head heat source and the nozzle is significantly reduced, and the temperature distribution of the hot runner tends to be uniform. Therefore, the optimization scheme of 3D printer head structure is of great significance for the stable transportation and deposition of polymer melt.
【作者单位】： 北京化工大学机电工程学院;
【基金】：国家自然科学基金青年基金资助项目(51403014) 国家科技支撑计划(2014BAF10B01)
【分类号】：TP334.8;TQ316
本文编号：2474243
[Abstract]:In melt deposition manufacturing technology, the temperature field of hot runner and nozzle has a great influence on the flow and deposition of polymer. Aiming at the existing polymer melt differential particle 3D printer, the three-dimensional model of the machine head is established, and the temperature field distribution is obtained by finite element analysis. The simulation results show that there is a large temperature difference between the heat source and the nozzle, and the temperature distribution of the hot runner is uneven. In view of the shortcomings of the above structure, the optimization scheme of the nose structure is put forward, and the materials used are improved. The finite element thermal analysis of the optimized head is carried out again. The results show that the temperature difference between the optimized head heat source and the nozzle is significantly reduced, and the temperature distribution of the hot runner tends to be uniform. Therefore, the optimization scheme of 3D printer head structure is of great significance for the stable transportation and deposition of polymer melt.
【作者单位】： 北京化工大学机电工程学院;
【基金】：国家自然科学基金青年基金资助项目(51403014) 国家科技支撑计划(2014BAF10B01)
【分类号】：TP334.8;TQ316
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