Arc additive manufacturing path planning method and device based on constructed curved surface

The invention discloses an electric arc additive manufacturing path planning method and device based on a constructed curved surface. The method comprises the steps that according to model parameters of an electric arc additive model, single-channel forming parameters and the single-channel forming section size under the single-channel forming parameters are determined; according to the single-channel forming parameters and the single-channel forming section size, three-dimensional path curved surface construction is conducted on the electric arc additive model, and a path curved surface of the electric arc additive model is obtained; performing hierarchical slicing processing on the path curved surface to generate a plurality of hierarchical curved surfaces and a plurality of curves of each hierarchical curved surface, and taking the plurality of curves of each hierarchical curved surface as the additive path; and generating an electric arc additive manufacturing processing code according to the additive pat