An adaptive layering method for 3D printing that preserves unconventional features of models

Abstract

The invention discloses an adaptive layering method for 3D printing that retains unconventional features of a model, comprising the following steps: S1. Define and identify regular features of the model, adjust the feature height spacing, and set a split at the adjusted height of each regular feature. Layer plane; S2. Subdivide the model by controlling the layer thickness between every two adjacent conventional feature heights, and retain unconventional features; S3. Adjust the layer height according to the actual printing layer thickness limit. The present invention not only defines and recognizes the common feature points, feature lines and feature surfaces of most models, but also ensures that these features will not be lost and offset during the printing process; and the method of calculating the volume error rate is adopted when the conventional definition is not satisfied. The detailed features of the model are subdivided, which effectively retains the unconventional features of the model, further reduces the printing error, and improves the modeling accuracy of the model.

Description

technical field [0001] The invention belongs to the technical field of 3D printing data processing, and in particular relates to a 3D printing adaptive layering method that preserves unconventional features of a model. Background technique [0002] 3D printing technology is an additive manufacturing technology that processes three-dimensional CAD models into entities by accumulating materials layer by layer. In a series of data processing processes, the 3D CAD model is discretized into 2D layers, and then the processing path of the layer file is converted into a machine code that can be recognized by the printer to complete the solid printing of the part. 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] The current research on layering algorithms is mainly divided into two categories: equal thickness layering and adaptive l...

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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