3D打印砂型的滚压紧实方法的探究  

Exploration of Rolling Compaction Methods for 3D Printing Sand Mold

作　　者：李景明 陈瑞 宋照伟 高云保 熊云龙 赵岭 张海军 LI Jing-ming;CHEN Rui;SONG Zhao-wei;GAO Yun-bao;XIONG Yun-long;ZHAO Ling;ZHANG Hai-jun(Shenyang Research Institute of Foundry Co.,Ltd.,Shenyang 110022,Liaoning,China)

机构地区：[1]沈阳铸造研究所有限公司,辽宁沈阳110022

出　　处：《铸造》2021年第12期1430-1435,共6页Foundry

基　　金：联合基金项目(U1808216)。

摘　　要：针对砂型3D打印无法采用紧实方法,只能通过添加粘结剂的方法增加强度,粘结剂加入量大,导致砂型发气量大,强度低的问题,提出在3D打印过程中增加一种新的工艺方法滚压紧实工艺。本文对滚压紧实基本原理进行了阐述,并对其进行了试验探究,分析了滚压过程各项因素的变化对砂型强度、透气性及紧实率的影响。研究结果表明:滚压紧实可以提升砂型强度,当滚压层层厚越小,滚压压下量越大,砂型强度越高;滚压速度越小,砂型强度越高;而滚压辊直径的大小对滚压砂型的各项性能基本没有影响。研究结果有望为进一步拓展3D打印砂型的应用提供了一定数据支撑。In view of the fact that 3D printing of sand mold cannot use the compacting method,the strength can only be increased by adding a binder.The large amount of binder added leads to the large amount of gas and low strength of the sand mold.It is proposed to add a new rolling compaction type during the 3D process.This paper expounded the basic principle of the rolling compaction,and conducted experimental exploration on it,analyzed the influence of the changes of various factors in the rolling process on the strength,air permeability and compaction rate of the sand mold.The results show that the rolling compaction can increase the strength of the sand mold.The smaller the layer thickness,the greater the rolling reduction,and the better the strength of the sand mold;the lower the rolling speed,the better the strength of the sand mold;the diameter of the rolling roller has basically no effect on the performance of the rolling sand mold.The results will provide a data foundation for further application of the 3D printing sand mold.

关 键 词：3D打印 滚压紧实 砂型强度 砂型透气性 

分 类 号：TG242[金属学及工艺—铸造]