摘要
针对国内外活塞挤压喷射生物3D打印研究中,存在过于依赖实验研究、缺乏系统理论分析的问题,提出了有限元辅助分析与设计的方法。利用流体力学相关理论和有限元分析软件ANSYS建立了活塞式喷头挤出过程的流体动力学仿真模型,分析了喷头各项设计参数(喷嘴长度、喷嘴直径、接头长度、接头直径、各变径过渡夹角等)对挤出过程的影响,通过实验验证了喷嘴直径和喷嘴长度对挤出过程产生的影响。研究表明:喷嘴越长,缸体内所需的挤出压力就越大;喷嘴直径越小,挤出压力对其变化就越敏感。该方法能够对生物3D打印活塞式喷头的设计提供一定的理论参考。
As there is a lack of systematic theoretical analysis for piston extrusion in biological 3D printing, fluid dynamics simulation model of extrusion process for piston nozzle was established based on fluid dynamics and finite element software ANSYS, and the influence of the nozzle design parameters on the extrusion process was analyzed. The impact of nozzle length and diameter on the extrusion process was studied through experiments. The results show that the extrusion pressure in the cylinder is bigger with longer nozzle, and the extrusion pressure is more sensitive to the diameter change with smaller nozzle diameter. This method is effective for theoretical research on the design of biological 3 D printing piston nozzle.
作者
李艳
李传良
王梓勋
LI Yan LI Chuanliang WANG Zixun(College of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China State Key Laboratory of High Performance Complex Manufacturing, Central South University, Changsha 410083, China)
出处
《轻工机械》
CAS
2017年第4期33-37,共5页
Light Industry Machinery
