【摘要】 针对气压挤出3D打印方法打印高黏度材料(黏度>1000 Pa·s)时存在挤出缓慢、易堵塞的问题，提出一种基于超声辅助的高黏度材料3D打印方法。首先，对超声辅助3D打印振动减摩机理进行分析，并模拟仿真了超声振动对高黏度材料打印速度的影响。然后，设计并搭建了超声辅助3D打印平台，并进行了高黏度材料挤出速度测试，研究了超声振动作用下振幅与喷嘴直径对于挤出速度的影响规律。最后，检验了打印成型精度，打印样件整体误差控制在1%内，结果表明，所提出高黏度材料超声辅助3D打印方法在大幅提高打印效率的同时，能够保证较高的打印精度。这些现象对机械与航空航天制造、医疗以及建筑等领域中高黏度材料的高效高精3D打印具有潜在的应用价值。更多还原

【Abstract】 Aiming at the problems of slow extrusion and easy clogging when printing materials with high viscosity (μ>1000 Pa·s) by pneumatic extrusion 3D printing method，an ultrasound-assisted 3D printing method for high viscosity materials was proposed.Firstly，the friction reduction mechanism of ultrasound-assisted 3D printing was analyzed，and the effect of ultrasonic vibration on printing speed of high viscosity materials was simulated.Then，an ultrasound-assisted 3D printing platform was designed and built，and the extrusion speed of high viscosity materials was tested.The effects of ultrasonic vibration amplitude and nozzle diameter on the extrusion speed were studied.Finally，the printing accuracy is tested，and the overall error of the printed sample is controlled within 1%.The results show that the proposed ultrasound-assisted 3D printing method for high viscosity materials can greatly improve the printing efficiency and ensure high printing accuracy.These phenomena have potential application value for high efficiency and high precision 3D printing of high viscosity materials in mechanical and aerospace manufacturing，medical and construction fields.更多还原