Path Planning for Multi-Axis Additive Manufacturing Based on Normal Slicing and Helical Strategy

Additive manufacturing (AM) technology when combined with multi-axis strategies is widely used in various industries due to its growth potential and innovation. Before printing a solid part, it is important to obtain path data based on the geometric features of the model. Most of the previous path planning methods are based on fixed-direction slicing and section-filling strategies, which can lead to step effects and frequent start-stop problems. Therefore, this paper proposes a path planning method based on normal direction slicing and helical strategy. First, cross-sections adapted to the model growth characteristics can be derived based on guidelines to ensure smooth contour boundary changes after layering. Then, the discrete contours are transformed into a helical upward pattern through the mapping relationship between neighboring layers to ensure the global continuity of the path. Finally, validation is performed on an StereoLithography (STL) model of a typical part, and the visualization results demonstrate the effectiveness and feasibility of the method.