大悬臂回转体金属零件的熔积增量成形技术

Research on Large Cantilever Axially Symmetrical Metal Parts based on Deposition Incremental Technology

在具有倾角曲面或悬空特征的、复杂金属零件的直接增量制造中,无需支承的LENS与HPDM技术可省去因设立支承带来的诸多不便,在制造高性能和梯度功能材料零件方面独具优势;但尚未有效解决大悬臂复杂形状零件成形过程中的流淌问题。为此,本文提出基于骨架特征的变方向无支承制造技术,以改善制造效果。采用高效低成本的电弧熔积五轴直接成形制造系统,完成了大悬臂零件的直接成形制造。试验结果表明,该技术可用于此类零件的增量成形,为无支承增量成形技术在复杂悬臂结构零件的精确数字化熔积制造中的应用提供了有效途径。

LENS and HPDM technology have a distinct advantage and inconvenience without supporting for the complex surface with cantilever characteristics in manufacturing high performance or functional gradient materials parts, but the problem of metal flow has not been solved effectively. The paper proposed a new method to solve the problem by changing manufacturing direction based on skeleton characteristics. It is completed that the direct manufacturing of large cantilever parts with low cost and high efficiency arc based on deposition manufacturing system of five-axis. The experimental results showed that the technology can be used in incremental manufacturing for the above parts and provide an efficient way for the precise digital deposition manufacturing with complex cantilever structure.