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3D model slicing and projection surface generation method for surface exposure additive molding

A technology of additive molding and surface exposure, which is applied in the field of additive molding manufacturing, can solve the problems that the surface exposure molding process cannot be applied and is difficult to remove, and achieve the effect of optimal support effect, small support volume, and improved algorithm efficiency

Active Publication Date: 2017-02-15
SHAOXING FAST REAL ELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the method of obtaining support in the fusion deposition process (FDM) is mainly to obtain the spatial position of the support by calculating the projection of the contour on the two-dimensional plane, but this method obtains the support and fills the entire gap, which is difficult to remove and cannot be applied to Surface Exposure Molding Process

Method used

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  • 3D model slicing and projection surface generation method for surface exposure additive molding
  • 3D model slicing and projection surface generation method for surface exposure additive molding
  • 3D model slicing and projection surface generation method for surface exposure additive molding

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Embodiment Construction

[0033] Such as figure 1 As shown, the method for generating slices and projection planes based on ray tracing in this embodiment includes the following steps (the English letters in the figure represent the following step numbers):

[0034] A) Input the STL file of the 3D solid model (STL file is a standard format for expressing the 3D model in the field of additive manufacturing), read the number of vertices, edges and triangles of the 3D solid model, and judge whether it conforms to the 3D solid model Euler's formula (the number of vertices, the number of triangles, and the number of sides are respectively recorded as V, T, and E, and the three must meet the Euler's formula of the mesh model: T–E+V=2–2H, where H represents the through hole number), if satisfied, go to step B); if not satisfied, prompt input model error;

[0035] B) Establish the vertex table Vt and triangle table Trt of the model (the input original model contains point, edge, and triangle information, but ...

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Abstract

The invention discloses a three-dimensional model slice for surface exposure additive forming and a projection plane generating method. A projection plane and a support of the projection plane are generated based on ray tracing; the slicing efficiency is improved through a model traversing method based on a half-edge data structure, and an optimal slicing effect is obtained through an appropriate anti-aliasing measure; the slicing and support generating are carried out at the same time, additional data processing is avoided, a support column and a support branch are constructed through an optimal topology structure, the maximum support size is achieved, and the shape of a machined solid body is not affected.

Description

technical field [0001] The invention relates to a photosensitive surface exposure technology in the field of additive molding manufacturing, in particular to a method for slicing and projecting a 3D model. Background technique [0002] Additive Manufacturing (AM), also known as 3D printing technology, reduces manufacturing from three-dimensional to two-dimensional, making it possible to process complex parts. The surface exposure molding technology based on image projection uses digital micro-lenses to output the cross-sectional graphics of the molded parts. Layer molding, and finally the target part is obtained. [0003] The key to this technology is to efficiently obtain high-precision cross-sectional graphics, how to obtain the cross-sectional profile on the basis of existing parts (this "part" refers to the solid model to be 3D printed), and how to generate the support of the hanging part of the part is Two main technical difficulties. Current research on model slicin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
Inventor 张靖金良宋轩王彬潘亚月
Owner SHAOXING FAST REAL ELECTRONICS TECH CO LTD