按需喷射下金属熔体流动行为数值分析

Numerical analysis of flow behavior of metal melt under on-demand injection

金属熔体沉积增材制造技术可通过逐层堆积直接成形零构件,无需特殊模具和昂贵设备,被公认为是一种节能、降耗的新型快速成型方法,极具发展潜力。研究了按需喷射下金属熔体沉积、铺展凝固机理以及其工艺参数控制;层流和湍流不同情况下金属熔体沉积铺展的主要特征参数;探索了金属微熔体在小空间、大时间温度梯度环境下沉积成型中熔体流动行为、凝固成型机理。这种成形方法将为复杂金属构件的高效控形控性增材制造开拓新途径。

Metallic melts deposition material-adding manufacturing technology can directly form zero components through layer-by-layer accumulation,without special mould and expensive equipment,which has been widely recognized as a new kind of energy saving&consumption reduction rapid prototyping method with extreme development potential.The metallic melts deposition,spreading solidification mechanism and the process parameter control under on-demand injection have been studied.The melt flow behavior and solidification molding mechanism of the micro metal melt have been explored during deposit forming process in little space&large time temperature gradient environment.The main characteristic parameters of metal melt during deposit spreading process have been studied under laminar flow and turbulent flow conditions.This method will create a new method for efficient control materialadding production of complex metal member.