3D printing filling path planning method based on level set

Abstract

The invention discloses a 3D printing filling path planning method based on a level set. The 3D printing filling path planning method based on the level set comprises the following steps of 1, importing a three-dimensional model, obtaining the slice contour of each layer of the three-dimensional model, and carrying out triangular mesh generation on closed regions formed by the slice contours; step 2, constructing a filling path implicit function F (x, y) according to the shape requirement of the filling path of a printed object, and calculating the level set height of a filling path level set curve relative to the filling path implicit function; step 3, obtaining coordinates of each point of the filling path level set curve under each level set height; and 4, according to the adjacency topological relation of the triangulation grid triangular cells, connecting all points on the level set curve into an ordered contour. According to the method, the filling path pattern is mapped into the implicit function, and the complex filling path contour meeting the use requirements of the object is extracted by utilizing the strong topological change processing capability of the level set, so that the splitting and merging problems of the filling path can be well handled with, complex geometric calculation caused by only depending on the slice contours can be avoided, and the diversity and flexibility of the 3D printing filling paths can be effectively improved.

Description

technical field [0001] The invention relates to the technical field of 3D printing, in particular to a level set-based filling path planning method for 3D printing. Background technique [0002] 3D printing, also known as additive manufacturing, is a technology that manufactures objects by printing materials layer by layer. Because it changes the traditional subtractive manufacturing mode and can shape objects of any shape, it is increasingly used in various industries. All walks of life. [0003] Before manufacturing an object in 3D printing, it is first necessary to slice the model layer by layer to obtain the closed contours of each slice, and then fill the interior of these contours with paths. The quality of the filling path plays a decisive role in forming an object with a good structure. Appropriate filling path can not only improve manufacturing efficiency and prolong the service life of equipment, but also greatly improve the molding quality of parts, reduce warpi...

AI Technical Summary

Problems solved by technology

These filling paths do not consider the force and material characteristics of the object, and only rely on the slice contour information to generate the printing path by geometric calculation, so it is far from meeting the requirements of increasingly complex structures and multi-materials

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