基于金属3D打印技术成形嵌套零件工艺研究

针对传统采用多个零件拼接而成具有悬垂嵌套结构的零件，提出了金属均匀喷射熔滴沉积“双喷头”3D打印成形工艺，开发了金属微喷熔滴沉积成形试验平台，通过对新型支撑材料的配比和成形工艺研究，实现了金属以及支撑材料成形的联动控制，成形出较高精度悬垂嵌套的金属制件，与传统成形工艺相比，具有成形周期短，制造成本低等优点，实现了此类零件的即用即打，此类零件成形提供了实现的途径与条件.
According to the nested components jointed with multiple parts, a double-nozzle droplet deposition process was put forward in this paper, and the experimental system was developed. Through the research on the properties of support materials and the process of double-nozzle droplet deposition, the linkage control of the metal droplet deposition and the support material extrusion was realized, and a nested component with complex construction was fabricated directly. Compared with the traditional forming processes, this double-nozzle deposition process has the advantages of short cycle, low cost and so on. It can provide an approach way to build the nested parts.