Unsupported 3D printing method based on dynamic slicing algorithm

Abstract

The invention relates to an unsupported 3D printing method based on a dynamic slicing algorithm. The unsupported 3D printing method comprises the following steps: extracting a neutral skeleton point set of a model according to triangular patch data in an STL document of the model; performing curve fitting on the neutral skeleton point set to obtain a neutral skeleton curve; selecting a slicing point on the neutral skeleton curve of the model and calculating a tangent vector of the point, wherein the slicing direction is always perpendicular to the Z-axis direction of a five-axis 3D printer through real-time control on the spatial rotation of a five-axis 3D printing receiving platform; finally generating a G code identified by the five-axis 3D printer to realize spatial printing. The unsupported 3D printing method provided by the invention mainly focuses on the unsupported printing of a cantilever structure with continuous holes or grooves, simultaneously avoids external and internal supporting structures of cantilever mechanism printing parts, reduces the printing supply and time, avoids the stripping support post-treatment process and improves the flexibility of an unsupported printing process.

Description

technical field [0001] The invention relates to the technical field of spatial 3D printing, in particular to an unsupported 3D printing method based on a dynamic slicing algorithm. Background technique [0002] 3D printing is a kind of additive manufacturing technology. Based on the digital model file, the computer is used to cut the model into a series of thin slices. The 3D printing equipment manufactures each layer of thin slices from bottom to top, and finally superimposes them to form a three-dimensional entity. This manufacturing technology does not require traditional tools or molds, and can realize the manufacture of complex structures that are difficult or impossible to process by traditional techniques, and can effectively simplify the production process and shorten the manufacturing cycle. [0003] Existing 3D printers are mostly three-degree-of-freedom, and the manufacturing form is stacked layer by layer along the Z-axis direction, and the slicing method is pla...

AI Technical Summary

Problems solved by technology

The current unsupported 3D printing focuses on the unsupported printing of the outer contour of the solid model, but it is difficult to achieve unsupported printing for the internal continuous hole structure, and the internal continuous hole or groove structure plus a support structure is generally very difficult. Difficult to remove

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