Sand table forming dynamic slicing method based on three-dimensional data driving

Abstract

The invention discloses a sand table forming dynamic slicing method based on three-dimensional data driving. The method comprises the steps that an STL model is constructed, the feature data of a to-be-printed sand table are acquired from the STL model, the feature data are trained, and an optimal slicing processing scheme is obtained; according to the optimal slicing processing scheme, layered slicing processing is carried out on the STL model, first contour data of each layer of slice are obtained, the first contour data are pre-processed, and second contour data are obtained; in the layered slicing process, triangular patches corresponding to layered heights in various patches need to be automatically adjusted according to different layered heights; and the second contour data are optimized, third contour data after curve fitting are obtained, the third contour data are converted into G codes which can be identified by a three-dimensional printer, and the printer is guided to achieve printing layer by layer. Compared with a traditional method, the manufacturing precision is higher, meanwhile, the scale can be enlarged and reduced at will, and meanwhile errors brought by splicing of the sand table are reduced at.

Description

technical field [0001] The invention belongs to the technical field of 3D printing, and in particular relates to a dynamic slicing method for sand table forming driven by three-dimensional data. Background technique [0002] The sand table has a wide range of uses, and can vividly display the terrain of the combat area, and show the composition of enemy and enemy positions, the deployment of troops, and the configuration of weapons. The traditional sand table is a model made of sand, foam and other materials in a certain proportion according to topographic maps, aerial photos or field terrain. 3D printing refers to the process of manufacturing a digital model into a three-dimensional entity by adding materials layer by layer. According to the shape of the sand table to be printed, using 3D printing technology to print the sand table requires making several sections with a certain thickness and specific shape, and then bonding these sections layer by layer to obtain the requ...

AI Technical Summary

Problems solved by technology

The 3D printing process essentially adopts the idea of ​​discrete and superposition. The discrete process is to slice the 3D model and process the obtained layer information. However, at present, only one material can be used for 3D printing, and different physical properties cannot be processed. The mixed use of different materials makes it impossible to express more delicate and realistic representations of different types of ground features in the sand table production process.

At present, the additive manufacturing technology research based on 3D data visualization has achieved certain results, but due to the limitation of the data form, a large amount of artificial optimization and compensation of the model is required before the additive manufacturing, and the post-forming processing process is time-consuming and cumbersome, which restricts the additive manufacturing process. Application of material manufacturing technology in rapid and efficient display of terrain data

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