Three-dimensional model two-dimensional nested placement method based on three-dimensional printing

Abstract

The invention discloses a three-dimensional model two-dimensional nested placement method based on three-dimensional printing. The method comprises the following operation steps: S100: the three-dimensional model has attributes in X, Y and Z directions, placing the three-dimensional model on a two-dimensional plane only having the attributes in X, Y and Z directions, projecting the three-dimensional model perpendicular to an XY plane to obtain a contour polygon of the model, and calculating according to the contour polygon to obtain an angle suitable for placing each model in the plurality ofmodels; S200, determining a model placement sequence after the contour polygon is solved; S300, according to the determined model placement sequence, sequentially placing the models according to a certain angle, and obtaining a placement result; and S400, repeating the previous step S300 for multiple times to obtain a plurality of instance results, and selecting the optimal instance result as thefinal result. According to the method, more models can be placed on the same platform, more parts can be printed at the same time, the production efficiency is greatly improved, and the actual production requirements can be met.

Description

Technical field [0001] The invention relates to the technical field of three-dimensional printing, in particular to a two-dimensional nesting method for three-dimensional models based on three-dimensional printing. Background technique [0002] In 3D printing, especially in digital light processing (DLP), light curing molding (SLA), selective laser melting (SLM) and other technologies, the 2D nesting of 3D models (2D nesting, is to place 3D models on It is very important that the models do not collide with each other on a two-dimensional plane platform. While meeting printing needs, the tighter the placement on the printing platform, the more models can be printed at the same time, which improves the efficiency of printing production and manufacturing. [0003] Existing 3D printing pre-processing software: 1. Some have the function of 2D packing / 2Dnesting for 3D models. But they can't call it two-dimensional nested placement. The fundamental reason is that their placement method ...

AI Technical Summary

Problems solved by technology

But they cannot be called two-dimensional nested placement. The fundamental reason is that their placement method is based on the axis-aligned bounding box of the model.

The effect of this method is not tight enough, leaving a lot of space, resulting in low production efficiency

2. Some 3D printing software has the function of two-dimensional nesting and placement

However, their algorithms are still not tightly placed, or the program takes too long to run, and there is still room for improvement

3. The printing platform of many 3D printers on the market is not necessarily a rectangular platform, for example, the printing platform of some 3D printers is circular

However, in the existing 3D printing software, there is no good software that can handle the close nesting of circular platforms

[0004] In the existing academic papers and the latest research progress, many scholars have proposed different nested placement algorithms, but their shortcomings are still the following: 1) The algorithm complexity is too high and the time efficiency is too low

2) The algorithm itself is flawed, and the effect of placing complex models is not good

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