基于颗粒流态化技术的砂型3D打印铺砂器的开发与应用研究  

Research on the Development and Application of 3D Printing Sand Spreader Based on Particle Fluidization Technology

作　　者：李征 刘丰 明禹 王驰腾 侯俊吉 LI Zheng;LIU Feng;MING Yu;WANG Chi-teng;HOU Jun-ji(State Key Laboratory of Advanced Forming Technology and Equipment,Being National Innovation Instute of Lightweight Ltd.,Beijing 100044,China)

机构地区：[1]北京机科国创轻量化科学研究院有限公司先进成形技术与装备国家重点实验室,北京100044

出　　处：《铸造》2022年第8期1045-1049,共5页Foundry

基　　金：机械科学研究总院技术发展基金资助项目(项目编号:311908Q9)。

摘　　要：为了解决铺砂过程中的预混砂结桥问题,本文基于颗粒流态化技术开发了一种新的砂型3D打印铺砂器。利用仿真手段对比分析了三种(平底、圆底、锥底)流化床铺砂器中型砂的流动特性,在满足铺砂量的要求下,平底流化床铺砂器对已打印砂面的破坏影响小。基于仿真结果开发了新的平底铺砂器样机并进行了现场应用,其铺砂质量良好。In order to solve the problem of premixed sand bridges in the sand paving process, a new sand spreader of sand mold 3D printing was developed on the basis of the particle fluidization technology in this paper. The flow characteristics of molding sand in three kinds of fluidized bed sanders(flat bottom, round bottom and cone bottom) were compared and analyzed by means of simulation method. The results showed that the flat bottom fluidized bed sander had the least damage to the printed sand surface under the condition of meeting the requirements of sand quantity. Based on the simulation results, a new flat bottom sand spreader prototype was developed and applied in the field, and the sand spreading quality was good.

关 键 词：颗粒流态化 砂型3D打印 铺砂 型砂流动性 

分 类 号：TG242[金属学及工艺—铸造]