高频振动辅助的FDM 3D打印喷头结构设计及其实验研究  

Structural design of a FDM 3D printer head assisted with high frequency vibration and experimental research

作　　者：冶竣峰 郭明森[1] 邢晓红[2] 张凌鹤 Ye Junfeng;Guo Mingsen;Xing Xiaohong;Zhang Linghe(The State Key Laboratory of Mechanics and Control of the Mechanical Structures,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;Nanhang Jincheng College,Nanjing 211156,China;College of Mechanical and Electrical Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)

机构地区：[1]南京航空航天大学机械结构力学及控制国家重点实验室,南京210016 [2]南京航空航天大学金城学院,南京211156 [3]南京航空航天大学机电学院,南京210016

出　　处：《国外电子测量技术》2021年第2期73-77,共5页Foreign Electronic Measurement Technology

基　　金：江苏高校优势学科建设工程(PAPD);国家自然科学基金(51775273);装备预研航天科工联合基金(6141B07090119);国防基础科研基础研究与前沿技术计划(JCKY2018605C010)项目资助。

摘　　要：由于熔融沉积增材制造技术(fused deposition modeling,FDM)能极大缩短样件的研发制造周期,且能直接打印尼龙PA、聚醚醚酮PEEK等高强度工程塑料,使得FDM技术工艺迅速发展。有研究表明在挤出加工中,振动可以增加相同机头压力下的挤出流率或降低相同挤出流率下的口模压力。针对熔融沉积型3D打印机在打印过程中存在的打印速度慢的问题,引入了高频振动辅助的工作方式,设计了集成压电换能器的FDM 3D打印喷头。通过COMSOL Multiphysics有限元软件优化了集成压电换能器的3D打印机喷头结构,制备了一个打印头原型并进行测试,挤出测试结果表明,高频振动能够有效地降低纯ABS和15wt%碳纤维-PLA流动阻力,提高挤出速度,从而提高打印速度。The fused deposition modeling(FDM)technology has being widely used due to its advantages such as rapid prototyping and utilization of high strength plastics(Nylon PA,PEEK,etc).Studies have shown that in the polymer extrusion process,vibration can increase the extrusion flow rate under the same die pressure(or reduce the required die pressure while keeping the same extrusion flow rate).In order to improve the printing speed,vibration-assisted printing method is proposed,and the FDM 3 Dprinter head integrated with ultrasonic transducer is designed.The structure of the printer head is optimized by COMSOL Multiphysics finite element software.A printer head prototype is fabricated and tested.The extrusion test results show that high frequency vibration can effectively reduce the flow resistance of pure ABS and 15 wt%carbon fiber-PLA and increase the printing speed.

关 键 词：3D打印喷头 压电换能器 振动辅助 有限元分析 

分 类 号：TB552[理学—物理] TH164[理学—声学]