3D printing self-adaptive layering method capable of reserving unconventional features of model

Abstract

The invention discloses a 3D printing self-adaptive layering method capable of reserving unconventional features of a model. The 3D printing self-adaptive layering method comprises the following steps of S1, defining and identifying conventional features of the model, adjusting the height spacing of the features, and setting a layering plane at the height of each adjusted conventional feature; S2, subdividing the model by controlling the layer thickness through the volume error rate between heights of every two adjacent conventional features, and retaining the unconventional features; and S3, adjusting the layering height according to the actual printing layer thickness limitation. According to the 3D printing self-adaptive layering method capable of reserving the unconventional features of the model, common conventional feature points, feature lines and feature surfaces of most models are defined and recognized, and it is guaranteed that the features are not lost or deviated in the printing process; and the model is subdivided at the detail features which do not meet the conventional definition by adopting a volume error rate calculation method, so that the unconventional features of the model are effectively reserved, the printing error is further reduced, and the model forming precision is improved.

Description

technical field [0001] The invention belongs to the technical field of 3D printing data processing, and in particular relates to a 3D printing self-adaptive layering method for retaining unconventional features of a model. Background technique [0002] 3D printing technology is an additive manufacturing technology that processes a three-dimensional CAD model into a solid by accumulating materials layer by layer. Its basic principle is "layer-by-layer manufacturing, layer-by-layer superposition". A series of data processing processes discretize the 3D CAD model into 2D layers, and then convert the processing path of the layer files into machine codes that can be recognized by the printer to complete the physical printing of the parts. Therefore, the data processing process, especially the layered slicing link, is the core content of 3D printing, which has a crucial impact on the accuracy and efficiency of physical printing. [0003] At present, the research on layering algor...

AI Technical Summary

Problems solved by technology

The equal thickness layering algorithm is to layer the entire model evenly according to the fixed layer thickness. This algorithm is simple to implement, but it is easy to cause the loss of dense features on the outer surface of the model; the adaptive layering algorithm is to automatically correct the printing according to the curvature change of the outer surface of the model. Thickness, reduce printing error with as few layers as possible

However, in dealing with the detailed features of the outer surface of the model, most of the current self-adaptive layering algorithms only summarize and define conventional features such as steps and holes, and are unable to deal with unconventional features such as chutes that do not meet the conventional definition. Identification and processing can easily lead to the loss of such features during the layering process. Therefore, it is necessary to consider the loss and offset of the model's unconventional features during the adaptive layering process to further reduce printing errors.

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