Partition-based 3D printing filling path generation method

Abstract

The invention discloses a partition-based 3D printing filling path generation method. The method includes the following steps: determining an SLC file for entity processing, and a filing path spacing; generating contour offset paths, and saving the innermost contour offset path; determining a scan line angle; carrying out primary partition on a processing area according to the number of the intersection points of the scan line and the offset polygon of the innermost offset contour; carrying out second partition on the primary partitioned result according to the number of intersection points to obtain subarea sets; generating subarea paths according to the intersection points of the scan line and the offset polygon of the innermost offset contour and a relationship among the subareas; adjusting the subarea paths; and connecting remaining subpaths by using a spline curve to obtain the final inner filling path. The partition-based 3D printing filling path generation method has the advantages of strong robustness, adaptation to models with various shapes, easy realization, good versatility, easy embedding into 3D printing equipment, and commercialization realization.

Description

technical field [0001] The invention relates to the field of 3D printing technology path generation methods, in particular to a division-based 3D printing filling path generation method. Background technique [0002] As a kind of rapid prototyping technology, 3D printing is based on the solid digital model file, uses molding materials, and constructs three-dimensional solids by layer-by-layer printing. Since 3D printing technology does not require machining and any molds, it can shorten the product development cycle and reduce production costs to a certain extent. It has been widely used in construction, aerospace, machinery, biomedicine and other fields. For 3D printing technology, in order to ensure the accuracy, the thickness of the layers is very small, and the number of layered layers is large, and the filling of each layer requires a certain amount of spraying and filling time, so the generation of the filling path inside the contour is reduced. Part molding time is o...

AI Technical Summary

Problems solved by technology

However, it also has the following problems: For complex parts with many cavities, this path generation algorithm has to deal with the problems of self-intersection and mutual intersection after contour offset, involving polygonal Boolean operations, which makes the algorithm relatively complicated. The generation speed is slow, and there are a large number of curves in the generated path trajectory, and the filling speed is low, which affects the filling speed

[0004] However, there is currently no specific algorithm for the generation of internal filling paths, especially the partitioning and sub-path connections involved in the generation of parallel reciprocating paths, which are common problems in more complex models

This will make it difficult to generalize the 3D printing path generation method, and cannot further accelerate the development of 3D printing technology

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