3D printing pretreatment hierarchical algorithm based on intensive feature

Abstract

The invention discloses a 3D printing pretreatment hierarchical algorithm based on the intensive feature. The method is implemented according to the following steps that firstly, a datum tangent planeis determined through minimum height triangular patch traverse searching and determining on a 3D model in the STL file format; secondly, upward and downward layering is conducted with the datum tangent plane as the datum, a minimum height triangular patch in an intersection triangular patch set is determined, the height of the triangular patch serves as the reference to determine the layer heightof the layer, self-adaption layering is conducted, and the appearance precision of the 3D printing model is guaranteed; and thirdly, by parity of reasoning, all layering work of the 3D model is finished. According to the algorithm, the position where the minimum height triangular patch of the 3D model is located serves as the layering datum, downward and upward layering treatment is conducted, layering is conducted according to the self-adaptation layering rule, the layering height is automatically set according to the patch height and size, the printing efficiency is improved, and the precision of the printed 3D model can be guaranteed as well.

Description

Technical field [0001] The invention belongs to the technical field of 3D printing pre-processing, and specifically relates to a 3D printing pre-processing layering algorithm based on dense features. Background technique [0002] 3D printing technology is a new manufacturing method that stacks molten materials layer by layer from the bottom up. After more than 30 years of development, it has been widely used in medical, aerospace, industry, education, personality products and other fields. To reach the limit of manufacturing precision and manufacturing efficiency is still the development trend of my country's current 3D printing technology. At present, most of the pre-processing software used in China comes from foreign open source software or simple Chinese. Although these software can complete the pre-processing of most models, the algorithm efficiency is low and the stability is poor, especially for the pre-processing of more complex models. , The understanding of the core alg...

AI Technical Summary

Problems solved by technology

At present, most of the pre-processing software used in China comes from foreign open source software or simple Sinicization. Although these software can complete the pre-processing work of most models, the algorithm efficiency is low and the stability is poor, especially for the pre-processing of more complex models. , the understanding of the core algorithm is not deep

The layering algorithm of open source software generally uses the lowest layer as the base layer to layer up layers of equal thickness. The result of layering processing is likely to cause the loss of features in dense areas.

Because the 3D model is generally treated with STL files, the surface is all triangular patches, and the triangular patches of dense features (where the 3D features are delicate) are generally small and dense. It is easy to lose these triangular faces, resulting in the loss of features, making the printed 3D model partially distorted

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