Generating method and system for slice path used for 3D printing

Abstract

The invention discloses a generating method and system for a slice path used for 3D printing. The generating method comprises the following steps that S1, a to-be-printed model is layered so that slice layers can be obtained; S2, the slice layers are partitioned, and a plurality of slice layer areas are formed; S3, line segments in all the areas are connected according to the line segment connecting rule so that intra-area paths can be formed; S4, the intra-area paths in the different areas are connected according to the path connecting rule, and a plurality of complete paths are formed; and S5, the shortest distance among the complete paths is calculated, and the complete paths are combined according to the shortest distance so that the slice path used for 3D printing can be generated. According to the provided generating method and system for the slice path used for 3D printing, a slice path scanning mode that subarea scanning is conducted based on the model characteristics is put forward, thus, the number of times of empty scanning during machining is greatly decreased, the forming time is shortened, and in addition, the forming effect is improved.

Description

technical field [0001] The invention relates to the technical field of 3D printing, in particular to a method and system for generating slice paths for 3D printing. Background technique [0002] 3D printing technology, also known as rapid prototyping technology, is a technology that imitates the principle of ordinary printers and can print three-dimensional models. 3D printing can be divided into two stages. First, the computer generates the model to be printed by means of design, scanning, etc., and divides the above-mentioned model to be printed into N layers according to a certain height, and each layer obtains a plane figure, that is, the above-mentioned to-be-printed model The model is cut into N slices, and then the raw materials are loaded into the 3D printer. The slice path generation algorithm generates the path machine code Gcode that can be recognized by the 3D printer according to the model to be printed, so as to control the printer to accumulate the raw materia...

AI Technical Summary

Problems solved by technology

However, when scanning a model to be printed with a cavity, due to the need to frequently cross the inner contour part, the empty travel of the nozzle is too much, which not only greatly affects the molding efficiency, but also the internal effect of the molded product is also very poor

For the generation method of the contour parallel scanning path, the scanning line needs to be carried out along the direction parallel to the boundary contour line, that is, scanning is carried out according to the equidistant line of the cross-sectional contour. The algorithm involves a variety of complex operations between polygons. Not only does it take a long time to form the path, but even the scan path cannot be generated correctly for complex models to be printed.

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