Simulation on geometric morphology of multi-channel deposition in laser wire additive manufacturing

Abstract

In multi-channel deposition of laser wire additive manufacturing, to obtain the deposited parts with flat geometric morphology, the deposition process of multi-channel involves the remelting and fusion of the current and the previous channel, and the lap ratio greatly affects the geometric morphology of multi-channel. To study the effect of lap ratio on multi-channel geometric morphology, experiment and numerical simulation were carried out, and the flatness of geometric morphology was taken as the evaluation index. The results show that with the increase of lap ratio, the gap between channels is gradually filled, the pits are gradually smaller, and the geometric morphology tends to be flatter. When the lap ratio exceeds the optimal lap ratio, the latter layer deposits too much on the former one and the height of the deposit will gradually increase, forming slope-like deposited parts.