不同工艺参数对金属熔滴沉积成形影响

采用数值计算与试验分析相结合的方法，深入研究了不同工艺参数(沉积距离、扫描速度、熔体温度、基板温度、喷嘴直径等)，单颗金属熔滴的沉积、铺展变化，验证了当前模型的正确性.通过对单颗金属熔滴沉积行为的研究，建立了单道/多道水平搭接成形数值计算模型，探索了金属熔滴在小空间、大温度梯度环境下沉积成形中熔体流动、铺展、凝固成形机理，结果表明，在典型特征截面上搭接成形时，通过优化工艺参数，可以获得熔滴沉积中的主要特征因素与成形形貌、内部质量之间的影响规律，为后续复杂金属件的熔滴液流沉积成形提供了技术支持和参考依据.

Influence of process parameters on metal droplet deposition

Using numerical calculation and experimental analysis methods, the deposition and spreading change of single metal droplet at different process parameters (deposition distance, scanning speed, melt temperature, substrate temperature, nozzle diameter, etc.). The validity of the current model was verified. Then, numerical models of single channel/multi-channel lap formations were established. Melt flow, spreading and coagulation mechanisms of the molten metal drop in the sedimentary formation were explored under small space and large temperature gradient. The results showed that when using the lap formation on a typical cross section, the influence law between primary characteristic factors, morphology and internal quality could be obtained by optimizing process parameters. This provides technical support and reference for the molten droplet depositing formation of the subsequent complex metal parts.