微滴喷射3D打印尺寸建模与数值模拟

Modeling and Numerical Simulation of Droplet Jetting 3D Printing Size

形貌尺寸是影响微滴喷射3D打印微结构精度的重要指标,主要受材料自身特性及打印工艺参数的影响,其中打印速度、加速度等为可控工艺参数.本文以微滴喷射打印直线轨迹为研究对象,建立了速度、加速度对打印尺寸及微滴沉积位置的预测模型,并通过数值仿真进行了验证.结果表明,所建模型能对3D打印尺寸及微滴沉积位置进行较为准确的预测,其中尺寸预测精度达6.07%、位置偏差预测精度为2.69%.研究结果可为微滴喷射3D打印尺寸控制提供理论和实际参考.

Morphology and size are important indexes affecting the micro structure accuracy of micro dropletjetting 3D printing, which are mainly affected by the characteristics of materials and printing process parameters, in which the printing speed and acceleration are controllable process parameters. In this paper, a linearprediction model of 3D printing size and droplet deposition position are established by using droplet injectionto print the straight line trajectory. The numerical simulation is carried out to verify the model. The resultsshow that the model can accurately predict the size of 3D printing and droplet deposition; and the size prediction accuracy is 6.07% ; and the position prediction accuracy is 2.69%. The research results can provide theoretical and practical reference for the dimension control of micro droplet jetting 3D printing.