3D打印连续碳纤维复合材料冷却模型及变形研究  

Cooling model and deformation study of 3D printing continuous carbon fiber composites

作　　者：董传贺 孙晓宇 李旺鑫 贾睿昊 赵欣 DONG Chuanhe;SUN Xiaoyu;LI Wangxin;JIA Ruihao;ZHAO Xin(Jinan Guoke Medical Technology Development Co.,Ltd.,Jinan 250000,China;Rongcheng College,Harbin Institute of Technology,Weihai 264200,China;Jinan Guangkang Medical Equipment Co.,Ltd.,Jinan 250000,China)

机构地区：[1]济南国科医工科技发展有限公司,济南250000 [2]哈尔滨理工大学荣成学院,威海264200 [3]济南广康医疗器械有限公司,济南250000

出　　处：《复合材料科学与工程》2025年第3期79-86,共8页Composites Science and Engineering

基　　金：山东省自然科学基金(ZR2021QE264)。

摘　　要：为探究3D打印连续碳纤维复合材料(C-CFRP)动态冷却行为以及翘曲变形行为,本文首先针对3D打印C-CFRP复合材料丝,建立了考虑材料物性及打印参数的冷却模型,采用热电偶、热成像仪监测了不同打印参数下复合材料丝温度随时间的变化,并与冷却模型计算值进行了验证,误差最小为11%。然后针对3D打印C-CFRP薄片件,探究了不同打印参数及尺寸对翘曲的影响,并分别采用热电偶、三坐标测量仪进行了成型过程温度动态变化以及翘曲度的测试。结果表明:挤出丝材高于玻璃化转变温度的时间与打印温度、层厚呈正相关,与打印速度呈负相关;C-CFRP薄片件的翘曲度与层厚、长度呈正相关,与打印温度、打印速度呈负相关。本文研究为高精度C-CFRP的3D打印技术发展提供了参考。To investigate the dynamic cooling behavior and warping deformation behavior of 3D printed continuous carbon fiber reinforced plastic(C-CFRP).Firstly,a cooling model considering material properties and printing parameters for 3D printed C-CFRP composite wires was established in this paper.And thermocouples and thermal imagers were used to monitor the temperature changes of composite wires over time under different process parameters.The results were verified with the calculated values of the cooling model,with a minimum error of 11%.Then,the influence of different printed parameters and dimensions on warping were explored for 3D printed C-CFRP thin pieces,and the dynamic temperature changes and warping degree during the forming process were tested using thermocouples and coordinate measuring instruments.The results shown that the time when the extruded wire exceeds the glass transition temperature was positively correlated with the printing temperature and layer thickness,and negatively correlated with the printing speed;the warpage of C-CFRP thin films was positively correlated with layer thickness and length,but negatively correlated with printing temperature and printing speed.A reference for the development of 3D printed high-precision C-CFRP technology was provided in this article.

关 键 词：连续碳纤维复合材料 3D打印 翘曲变形 冷却模型 

分 类 号：TB332[一般工业技术—材料科学与工程]