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树脂渗透对砂型 3D 打印成型精度影响机理研究
Influence Mechanism of Resin Penetration on Molding Accuracy of Sand 3D Printing
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- DOI:
- 作者:
- 李 征 1 ，单忠德 2 ，孙启利 1 ，张学良 1 ，余洛生 1
LI Zheng1 , SHAN Zhongde2 , SUN Qili1 , ZHANG Xueliang1 , YU Luosheng1
- 作者单位:
- 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; 2. 南京航空航天大 学，江苏 南京 211106
1. State Key Laboratory of Advanced Forming Technology and Equipment, Beijing National Innovation Institute of Lightweight Ltd., Beijing 100044, China; 2. Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China
- 关键词:
- 砂型 3D 打印; 成型精度；树脂加入量；水力半径；层厚
sand mold 3d printing; molding dimensional accuracy; resin addition amount; hydraulic radius; layer thickness
- 摘要:
- 研究了树脂渗透对砂型 3D 打印成型精度的影响，提出对应的理论模型，并进行实验验证。 结果表明：树脂
渗透通过树脂加入量、水力半径和铺砂厚度影响砂型打印成型精度，与成型尺寸无关。 随着树脂加入量的增大，树脂渗
透压力增大，尺寸误差增大；固化剂含量与型砂颗粒直径的增大均会导致型砂水力直径增大，进而导致尺寸误差变大；
铺砂层厚的增大导致树脂渗透阻力的增大，进而导致尺寸误差减小。
The influence of resin penetration on the molding accuracy of sand mold 3D printing was studied, and the corresponding theoretical model was put forward and verified by experiments. The results show that the resin penetration amount, hydraulic radius and sand thickness affect the precision of sand printing, and have nothing to do with the molding size. With the increase of resin content, the resin penetration pressure and dimensional error increase. The increase of the content of curing agent and the diameter of molding sand will lead to the increase of the hydraulic diameter of molding sand and the dimensional error. The increase of sand layer thickness leads to the increase of resin penetration resistance and the decrease of dimensional error.