层高对陶瓷浆料微流挤出成形质量的影响研究

doi:10.3969/j.issn.1004-132X.2021.15.010

摘要/Abstract

摘要： 为了确定微流挤出成形陶瓷浆料的最佳层高以及能够成形的最大高度，针对氧化锆陶瓷浆料，分析了丝体从喷头挤出后喷头与沉积丝体之间的5种高度关系，探讨了层高对打印质量的影响机理，并根据浆料特性建立了层间压缩形变模型；通过不同喷头直径和不同层高的3D打印工艺实验，采用数码显微镜扫描、尺寸测量及力学实验等方法对打印试样的表面形貌、成形精度及力学性能等进行了测量与表征，验证了所建模型的正确性。结果表明，当层高与喷头直径的比值分别为0.96、0.92、0.86、1、1.2时，打印质量从优到劣依次递减，因此，合理的层高设置可以减少陶瓷零件的打印缺陷，提高打印质量，为基于材料挤出工艺的参数选择提供一定的理论指导。

关键词: 陶瓷浆料, 挤出式3D打印, 层高, 成形质量

Abstract: In order to determine the optimal layer height and the maximum height of the ceramic slurry formed by micro-flow extrusion， the five height relations between the nozzle and the deposited filament were analyzed after the filament flew out of the nozzle for zirconia ceramic slurry， the influence mechanism of the height of the nozzle on the printing quality was discussed， and the interlayer compression deformation model was established according to the slurry characteristics. The surface morphology， forming precision and mechanics properties of the printed samples were measured and characterized by digital microscope scanning， dimension measurement and mechanics test through 3D printing technology tests with different nozzle diameters and different layers， and the correctness of the model was verified. The results show that under the different ratios of the layer height to the nozzle diameter， the printing quality from good to bad is as follows：0.96， 0.92， 0.86， 1， 1.2. Therefore， a reasonable layer height setting may reduce the printing defects of ceramic parts， and improve the printing quality， which may provide some theoretical guidance for the selection of processing parameters based on material extrusion-based additive manufacturing.

Key words: ceramic slurry, extrusion-based 3D printing, layer height, forming quality

中图分类号:

TP23
TP331

张静, 周婧, 张旭, 段国林. 层高对陶瓷浆料微流挤出成形质量的影响研究[J]. 中国机械工程, 2021, 32(15): 1844-1853,1860.

ZHANG Jing, ZHOU Jing, ZHANG Xu, DUAN Guolin. Study on Influences of Layer Height on Forming Quality of Ceramic Slurry Microfluidic Extrusion#br#[J]. China Mechanical Engineering, 2021, 32(15): 1844-1853,1860.

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链接本文: http://www.cmemo.org.cn/CN/10.3969/j.issn.1004-132X.2021.15.010

http://www.cmemo.org.cn/CN/Y2021/V32/I15/1844

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