Influence of Wire Feeding Mode on Formation of Single-pass Multilayer Inclined Parts in Laser Wire Additive Manufacturing

In order to study the influence of wire feeding mode on the formation of inclined parts in laser wire additive manufacturing, the laser wire deposition experiments of single-pass multilayer inclined parts were carried out under the modes of front wire feeding, rear wire feeding and side wire feeding. The changes of macroscopic morphology, cross-sectional morphology, forming size and the fitted center trajectory of each deposited layer contour were compared and analyzed. The results show that the paraxial wire feeding mode has an influence on the macroscopic morphology, average height, average wall thickness and average inclined angle of the single-pass multilayer inclined part. The height fluctuation value and wall thickness fluctuation value of the inclined part manufactured by rear wire feeding are the smallest, and the inclined angle error is also small, so the forming accuracy is better. The height fluctuation value, wall thickness fluctuation value and inclined angle error of inclined parts manufactured by side wire feeding are the largest, and the forming accuracy is poor. The welding wire can be stably fed into the middle and rear part of the molten pool under rear wire feeding mode, the actual forming position of each deposited layer is stable, and the forming accuracy of each inclined part is relatively better.