Boolean operation method for FDM three-dimensional printing vertical support model

Abstract

The invention discloses a Boolean operation method for an FDM three-dimensional printing vertical support model. The method specifically comprises the following steps of (1) a support area is searchedon the basis of an STL mesh model, and the support area is scanned into a support contour; (2) Boolean difference operation is performed on the support contour; (3) Boolean union operation is performed, specifically, a model obtained on the basis of the Boolean difference operation is a support body with the vertical side faces, the Boolean union operation is carried out for the side faces coinciding with each other, and the union faces of the side faces are actually vertical faces parallel to each other; and (4) re-meshing is performed, specifically, a corresponding relation of the meshes ata mesh boundary is re-established, so that it is guaranteed that the obtained support model is an effective two-dimensional manifold, and the support model is output. The method has the beneficial effects that Boolean difference and Boolean union operation are optimized, namely, a solving method of top surface-Z direction projection intersection is considered to obtain a proper support model, sothat the requirement on a algorithm is greatly simplified.

Description

technical field [0001] The invention relates to the technical field related to three-dimensional printing, in particular to a Boolean operation method for a vertical support model of FDM three-dimensional printing. Background technique [0002] FDM is an abbreviation for "Fused Deposition Modeling", which is fused deposition modeling. To understand FDM molding technology, we first need to change our thinking. Usually 2D printing is to print on a piece of paper (on a plane), while 3D printing is to complete the printing of a three-dimensional model. FDM, generally speaking, is to use high temperature to melt the material into a liquid state, and then solidify after being extruded through the print head, and finally arranged in a three-dimensional space to form a three-dimensional object. [0003] Due to the particularity of FDM equipment, the data preprocessing part needs to generate support parts for parts to prevent collapse during processing. It is a complex problem to ...

AI Technical Summary

Problems solved by technology

Generating support data for FDM devices based on existing STL models is a complex problem, which involves Boolean operations, tolerance processing, and robustness processing that are difficult to handle in digital geometry processing.