Multi-resolution photocuring 3D printing system and edge optimization printing method

Abstract

The invention discloses a multi-resolution photocuring 3D printing system and an edge optimization printing method, a three-dimensional model is preliminarily divided into H / h layers, H is the height of the three-dimensional model, h is the printing height of each layer, and the contour of the current layer is determined; selecting a next layer contour of the current layer, and performing difference set operation on the current layer and the next layer contour to obtain a positive region result, a zero region result and a negative region result; marking results of the positive region and the negative region, and accumulating the results into an edge structure of the three-dimensional model; a plurality of entities are obtained and marked as high-resolution printing areas; when the high-resolution printing area is manually designated, an entity or a surface is manually selected and marked as the high-resolution printing area; when the high-resolution printing area is not specified, marking a difference set of the whole three-dimensional model and the high-resolution area as a low-resolution printing area; meanwhile, photocuring is carried out, and a final solid model is obtained through layer-by-layer printing. According to the invention, the continuity and smoothness of the edge are optimized through simultaneous curing molding of a plurality of light sources with different resolutions.

Description

technical field [0001] The invention belongs to the technical field of photocuring 3D printing, and in particular relates to a multi-resolution photocuring 3D printing system and an edge optimization printing method. Background technique [0002] 3D printing technology belongs to additive manufacturing. By accumulating layers and continuously stacking the designed geometric structure, it can process complex geometric models that are difficult to process by traditional techniques, and has high flexibility. [0003] Photocuring 3D printing technology is an important branch of 3D printing. Specifically, light-curing 3D printing technology refers to the use of ultraviolet light sources in a certain wavelength range (usually 365-405nm) to irradiate liquid resin so that the resin is cured and shaped, and finally processed to obtain the designed model. Light curing technology can be roughly divided into two categories according to the type of light source. One is the printing solu...

AI Technical Summary

Problems solved by technology

[0008] For the above method of optimizing the quality of slope forming by graying the brightness of the light source at the edge of the printed structure, first of all, it is unreasonable to judge whether there is a slope by changing the area, and there are cases of misjudgment and missed judgment; secondly, grayscale The fineness of printing is affected by the printing resolution, and the brightness after graying will not be much different from the original normal brightness, so the processing quality that can be improved is limited, and the smoothness of curved or inclined surfaces cannot be effectively optimized, especially for Some steeper slopes make it more difficult to ensure optimal quality; in addition, this requires more subtle and continuous adjustment of the brightness of the light source, which puts forward higher requirements on the printing equipment, and correspondingly increases the cost of the entire equipment

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