摘要
针对碳纤维增强聚醚醚酮复合材料中高熔点、高黏度、低热穿透性以及打印过程出现阶梯效应等问题,基于激光辅助加热螺杆挤出的理念,设计了一种六自由度熔融沉积复合材料3D打印机。阐明了新型3D打印机的工作原理和结构设计,并且对核心设计结构渐变螺杆进行了强度校核和静应力分析,检验其实际工况下的可靠性。仿真结果表示,打印过程中渐变螺杆等效应力和变形量的最大值分别为215 MPa与0.055 mm,满足强度与刚度要求。该3D打印机精度、稳定性高、成本低,不仅可以消除阶梯效应,解决高熔点、高黏度问题,而且增强了热穿透性,提高了打印速度,改善了打印质量。该3D打印机可适用于其他诸多高性能热塑性材料的复合打印,应用领域广泛。
A six-degree-of-freedom fused deposition composite 3D printer was designed based on the concept of laser-assisted heated screw extrusion aimed to the problems of high melting point,high viscosity,low thermal penetration and step effect in the printing process in carbon fiber reinforced polyetheretherketone composites.The working principle and structural design of the new3D printer were clarified,and the strength calibration and static stress analysis of the core design structure of the progressive screw were carried out to check its reliability under actual working conditions.The simulation results indicate that the maximum values of the equivalent force and deformation of the progressive screw during the printing process are 215 MPa and 0.055 mm respectively,meeting the strength and stiffness requirements.The 3D printer can be applied to the composite printing of many other high-performance thermoplastic materials with a wide range of applications.
作者
夏振宝
张鹏飞
李俊儒
李欣琳
张传伟
何田
王晓
Xia Zhenbao;Zhang Pengfei;Li Junru;Li Xinlin;Zhang Chuanwei;He Tian;Wang Xiao(College of Mechanical and Electrical Engineering,Qingdao University,Qingdao 266071,China;School of Mathematics and Statistics,Qingdao University,Qingdao 266071,China)
出处
《工程塑料应用》
CAS
CSCD
北大核心
2022年第10期77-83,89,共8页
Engineering Plastics Application
基金
山东省高等学校青创人才引育计划(DC2000000891)。
关键词
聚醚醚酮/碳纤维
六自由度
3D打印
激光辅助加热
螺杆挤出
polyetheretherketone/carbonfiber
sixdegrees of freedom
3Dprinting
laser-assisted heating
screwextrusion
