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Surface quality improving method for DLP photocureable additive manufacturing

A technology of additive manufacturing and surface quality, applied in the field of additive manufacturing, can solve the problems of low surface quality, achieve the effect of improving surface quality, scientific and reliable principles, and reducing subsequent processing procedures

Inactive Publication Date: 2019-05-07
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Based on the main reason for the low surface quality of the existing DLP curing additive manufacturing parts, it is of great social and economic value to develop a method for improving the surface quality of DLP light curing additive manufacturing.

Method used

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  • Surface quality improving method for DLP photocureable additive manufacturing
  • Surface quality improving method for DLP photocureable additive manufacturing
  • Surface quality improving method for DLP photocureable additive manufacturing

Examples

Experimental program
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Effect test

Embodiment 1

[0018] The process of the method for improving the surface quality of DLP light-curing additive manufacturing involved in this embodiment is:

[0019] Using a computer to slice the three-dimensional digital model to obtain the outer contour 1 of the three-dimensional digital model;

[0020] Determine the beam curing width according to the DLP beam curing state;

[0021] Extend the outer contour 1 of the three-dimensional digital model to the inner normal direction and offset half the beam curing width to obtain the beam curing scanning path 2, and extend the beam curing scanning path 2 to the inner normal direction to offset half the beam curing width to obtain DLP curing internal boundary 3;

[0022] Place the three-dimensional digital model on the workbench 10, and use the DLP lamp group 8 to perform DLP curing on the inside of the DLP curing inner boundary 3 to obtain a curing area 4, and at the same time, generate DLP caused by halo spread outside the DLP curing inner bou...

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Abstract

The invention belongs to the technical field of additive manufacturing, and particularly relates to a surface quality improving method for DLP photocureable additive manufacturing. The surface qualityimproving method is characterized by comprising the following steps: performing slicing treatment on a three-dimensional digital model, thereby obtaining an inner area and an edge outline of the three-dimensional digital model; separately performing data processing on the inner area and the edge outline of the three-dimensional digital model to obtain a light beam curing scanning path and a DLP curing inner boundary; and performing DLP curing on the inner part of the DLP curing inner boundary to obtain a cured area, utilizing a scanning galvanometer to control a light beam to scan along the light beam curing scanning path, thereby obtaining an outer outline area of the three-dimensional digital model, wherein part of the area in the outer outline area is superposed with the DLP curing boundary, and the curing area is connected to the outer outline area. The surface quality improving method is scientific and reasonable in principle, is simple in curing process, can effectively improvesurface quality of current DLP light source photocureable additive manufacturing, and reduces follow-up processing processes.

Description

Technical field: [0001] The invention belongs to the technical field of additive manufacturing, and in particular relates to a method for improving the surface quality of DLP light-curing additive manufacturing, which can effectively improve the surface quality of single DLP light-curing additive manufacturing and reduce subsequent processing procedures. Background technique: [0002] Photocuring (photocuring) refers to the curing process of monomer, oligomer or polymer matrix under light induction. It has the characteristics of high efficiency, wide adaptability, economy, energy saving and environmental protection. It is generally used in the film forming process. Energy in the spectrum The activation energy generated by the highest ultraviolet light can break the C—C bond of the unsaturated polyester resin and generate free radicals to cure the resin; when a photosensitizer is added to the unsaturated polyester resin, ultraviolet light or visible light is used as the energy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C64/393B29C64/188B33Y50/02B33Y10/00
Inventor 张百成任淑彬陈刚章林曲选辉
Owner UNIV OF SCI & TECH BEIJING
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