3D printing supporting structure design method based on STL file

A support structure and 3D printing technology, applied in the field of 3D printing, can solve problems such as inability to achieve 100% detection, difficult removal of support structures, and troublesome post-processing stages, so as to save printing costs, save printing time, and be easy to remove Effect
CN112590198APending Publication Date: 2021-04-02HANGZHOU DIANZI UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HANGZHOU DIANZI UNIV
Publication Date
2021-04-02

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Abstract

A 3D printing supporting structure design method based on an STL file comprises the following steps that 3D modeling software is used for conducting three-dimensional modeling on a model, the STL fileis exported, the STL file is read, triangular patch vertex and normal vector information in the STL file is read, a critical angle is defined, the read triangular patch information is integrated, a to-be-supported area is projected to a working plane to form a two-dimensional projection area to obtain a part needing to be supported, sampling point sampling is carried out to generate a supportingstructure, and all vertex coordinates and normal vector coordinates are written into an STL file. Compared with the prior art, the problems that a traditional supporting structure is excessive in useamount, materials are wasted, the supporting structure is difficult to remove, and a to-be-supported area of a sharp-angled model including a suspension edge, a suspension point and the like cannot bedetected are solved, by means of the 3D printing supporting structure design method based on the STL file, the calculation efficiency is improved on the premise of guaranteeing that the model is tender and is consolidated and stably printed, the printing cost is saved, and the supporting structure is easier to remove.
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Description

technical field

[0001] The invention belongs to the technical field of 3D printing, in particular to a 3D printing support structure design method based on STL files. Background technique

[0002] Fused Deposition Manufacturing (Fused Deposition Modeling, FDM) technology is a common technology in 3D printing technology. It uses thermoplastic materials as printing raw materials to manufacture products by layer-by-layer printing. When printing, the printing material is heated and melted, and extruded into a filament directly under the nozzle. The nozzle moves along a certain path during the printing process. The filament material is extruded on the printing platform through the nozzle, and is rapidly cooled and solidified. With the emergence of fused deposition manufacturing technology, the design and optimization of support structures based on STL files has gradually become a hot topic.

[0003] At present, most support structures rely on commercial slicing software, such as...

Claims

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