FDM 3D打印机喷头设计

Design of FDM 3D printer nozzle

在温度因子的驱动下,研究基于FDM技术的3D打印机喷头设计思路。采用比例因子法,设定多目标条件下的3D打印机打印精度评价指标体系,设计3种不同喷口直径和2种不同加热腔结构,共形成6种比较方案,在12种打印介质的联合比较实验中对其性能进行分析。(1)通过技术手段加强对发热元件的温度控制精度,使其控制在打印介质熔融点附近,可以有效提升3D打印机性能。(2)加热腔温度传导机制下,T=1.03T 0时系统效率最高。(3)缩小喷口直径D 0,可有效降低成型效率比例因子B DS的统计学表达。在统计学角度证实了更小直径的FDM喷口可以实现更高的打印精度,影响打印精度的参数还包括对发热体温度的控制精度。

To study the design idea of 3D printer nozzle based on FDM technology driven by temperature factor.The scale factor method was used to set up the evaluation index system of 3D printer printing accuracy under multi-objective conditions.Three different nozzle diameters and two different heating chamber structures were designed to form six comparison schemes.The performance of these schemes was analyzed in the joint comparative experiment of 12 printing media.(1)Through technical means to strengthen the temperature control accuracy of the heating element,make it controlled near the melting point of printing medium,which can effectively improve the performance of 3D printer.(2)Under the temperature conduction mechanism of the heating chamber,the system efficiency is the highest when T=1.03T 0.(3)Reducing the nozzle diameter D 0 can effectively reduce the statistical expression of B DS.The smaller diameter FDM nozzle can achieve higher printing accuracy from the statistical point of view,and the parameters affecting the printing accuracy also include the control accuracy of heating body temperature.