振动场下FFF热熔喷头内熔体表观黏度的理论研究

doi:10.12068/j.issn.1005-3026.2021.03.014

东北大学学报（自然科学版） ›› 2021, Vol. 42 ›› Issue (3): 395-401.DOI: 10.12068/j.issn.1005-3026.2021.03.014

振动场下FFF热熔喷头内熔体表观黏度的理论研究

姜世杰，陈丕峰，孙明宇，董天阔

(东北大学机械工程与自动化学院，辽宁沈阳110819)

收稿日期:2019-09-15 修回日期:2019-09-15 接受日期:2019-09-15 发布日期:2021-03-12
通讯作者: 姜世杰
作者简介:姜世杰(1985-)，男，辽宁营口人，东北大学讲师，博士.
基金资助:
国家自然科学基金资助项目(51705068)；中央高校基本科研业务费专项资金资助项目(N180703009， N170302001).

Theoretical Study on the Apparent Viscosity of Melt Inside the Fused Filament Fabrication Extrusion Liquefier Under Vibration Field

JIANG Shi-jie， CHEN Pi-feng， SUN Ming-yu， DONG Tian-kuo

School of Mechanical Engineering & Automation， Northeastern University， Shenyang 110819， China.

Received:2019-09-15 Revised:2019-09-15 Accepted:2019-09-15 Published:2021-03-12
Contact: CHEN Pi-feng
About author:-
Supported by:
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摘要/Abstract

摘要： 热熔喷头内部熔体的表观黏度是影响熔丝制造成型(FFF)产品机械性能的关键因素之一.本文首先提出利用振动改善FFF热熔喷头内部熔体表观黏度的方法，即对喷头施加纵向的正弦振动力场;然后针对施加振动后热熔喷头内部熔体的表观黏度进行了理论建模，并利用已有文献中的实验结果验证了理论模型的正确性;最后，利用所建模型探讨了施加不同频率振动后熔体表观黏度的变化规律，阐明了相应机理.研究表明:熔体表观黏度的理论与实验结果吻合度较好，理论模型正确;对热熔喷头施加振动场后，熔体表观黏度有效值随着振动频率的增大而逐渐降低.

关键词: 熔丝制造成型;热熔喷头;振动;表观黏度;理论模型

Abstract: The apparent viscosity of the melt inside the extrusion liquefier is one of the key factors affecting the mechanical properties of fused filament fabrication (FFF) products. A method applying a longitudinal sinusoidal vibration to the FFF extrusion liquefier is proposed to improve the apparent viscosity of the internal melt. Then the theoretical model of the apparent viscosity of the melt inside the extrusion liquefier with vibration applied is carried out， and the experimental results from the existing literature are used to verify the correctness of the theoretical model. Finally， the variation of apparent viscosity with different-frequency vibrations applied is discussed through the model， and the corresponding mechanism is clarified. It is shown that the theoretical results agree well with the experimental ones，validating the model’s feasibility. When the vibration field is applied to the extrusion liquefier， the effective value of apparent viscosity will decrease with the increase of vibration frequency.

Key words: fused filament fabrication(FFF); extrusion liquefier; vibration; apparent viscosity; theoretical model

中图分类号:

TH113.1

姜世杰，陈丕峰，孙明宇，董天阔. 振动场下FFF热熔喷头内熔体表观黏度的理论研究[J]. 东北大学学报（自然科学版）, 2021, 42(3): 395-401.

JIANG Shi-jie， CHEN Pi-feng， SUN Ming-yu， DONG Tian-kuo. Theoretical Study on the Apparent Viscosity of Melt Inside the Fused Filament Fabrication Extrusion Liquefier Under Vibration Field[J]. Journal of Northeastern University(Natural Science), 2021, 42(3): 395-401.

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振动场下FFF热熔喷头内熔体表观黏度的理论研究

Theoretical Study on the Apparent Viscosity of Melt Inside the Fused Filament Fabrication Extrusion Liquefier Under Vibration Field

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