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A 3D printing method based on mesh model simplification

A 3D printing and grid model technology, applied in 3D modeling, image data processing, manufacturing auxiliary devices, etc., can solve problems such as the limitation of structural optimization results

Active Publication Date: 2018-07-24
CHINA THREE GORGES UNIV
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Problems solved by technology

However, these methods cannot well keep the geometric shape of the structure consistent with the stress state of the model entity, so the structural optimization results will be limited by the adopted structural type

Method used

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  • A 3D printing method based on mesh model simplification
  • A 3D printing method based on mesh model simplification
  • A 3D printing method based on mesh model simplification

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Embodiment Construction

[0072] In the simplified error based on the quadratic error metric algorithm, the order of edge folding and the position of new points are determined by the quadratic error measure, so before calculating the folding cost of the next round of folding, by calculating the curvature value of each folded vertex, Combining with polyhedron vertex convexity judgment method to determine the convexity of folded vertices, the quadratic error measurement algorithm is improved to judge whether vertices should be folded. Such as Figure 1a ~ Figure 1d as shown, Figure 1a Indicates that the folded vertices are convex, Figure 1b Indicates that the curvature increases. If the folded vertex is a convex point, and the curvature increases before and after simplification, the vertex will not be folded; Figure 1c Indicates that the folded vertices are concave, Figure 1d Indicates that the curvature decreases. If it is a concave point and the curvature decreases before and after simplification...

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Abstract

A 3D printing method based on grid model simplification is disclosed. On the basis of a present quadric error metric grid model simplifying algorithm, the vertex collapse cost is optimized through combining three-dimensional space vertex convexity-concavity and curvature, collapse vertexes are ensured to be simplified towards the inside of the entity of the model all the time. By reducing the number of triangular patches and reducing the volume of the model at the same time of not changing boundary characteristic, rigidity, or other physical characteristics of the grid model as possible, the objective of reducing material consumption of 3D printing is achieved. Validity of the method is finally verified by the volume change before and after the model simplification.

Description

technical field [0001] The invention relates to the technical computer application field, in particular to a 3D printing method based on grid model simplification. Background technique [0002] 3D printing technology is a high-tech based on the principle of additive manufacturing. It is the continuation and development of rapid prototyping technology, and its application fields are constantly expanding and popularizing. At present, the research hotspots on 3D printing focus on the principle and structure of 3D printers, 3D printing free forming process, 3D printing materials, and 3D printing costs. How to reduce material consumption to reduce the cost of 3D printing is one of the important research contents, and reducing material consumption by optimizing the model structure is a commonly used method at present. [0003] In recent years, many researchers have proposed model structure optimization methods such as internal hollowing, internal mosaic mesh structure, skin skele...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C64/393B33Y50/02G06T17/30
CPCB33Y50/02G06T17/30
Inventor 董方敏王洁瑜孙水发
Owner CHINA THREE GORGES UNIV
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